CN102955132A - Battery sensor - Google Patents
Battery sensor Download PDFInfo
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- CN102955132A CN102955132A CN2012102958923A CN201210295892A CN102955132A CN 102955132 A CN102955132 A CN 102955132A CN 2012102958923 A CN2012102958923 A CN 2012102958923A CN 201210295892 A CN201210295892 A CN 201210295892A CN 102955132 A CN102955132 A CN 102955132A
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- sense resistor
- battery
- current sense
- tongue piece
- terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/364—Battery terminal connectors with integrated measuring arrangements
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Abstract
The present invention relates to a battery, specifically a battery sensor for a battery installed in a motor vehicle. The battery sensor has a terminal clamp (2) that is made of an electrically conductive material for electrically connected the battery sensor (1) to an connecting terminal of the battery, specifically a ground contact terminal of the battery, and a low impedance current measuring resistor (4) for measuring the battery power which is charged or discharged through the battery. According to the invention, the battery sensor comprises several tongue structures (8-10) which are arranged at a distance away from the terminal clamp (2), for providing mechanical support of the current measuring resistor at the terminal clamp.
Description
Technical field
The present invention relates to a kind of battery sensor for battery, particularly on-vehicle battery.
Background technology
In current motor vehicles onboard power system, the electric current of on-vehicle battery (charging current or discharge current) is measured by battery sensor.Battery sensor is installed in earth terminal and the terminals that the battery earth terminal is connected.The actual measurement of battery current realizes by the current sense resistor (" shunt ") of a low resistance usually: when battery current can produce voltage drop during by current sense resistor, can extrapolate battery current according to Ohm law according to this voltage drop, for example can use current sense resistor EP 0605800A1 to measure.In addition an electronic measurement circuit can be installed in battery sensor, such as EP 1363131A1 and EP 1030185A2.
The problem of above these battery sensors is easily to be mechanically damaged because of misoperation, for example when installation personnel is moved with earth lead is connected on-vehicle battery, battery sensor has to bear the total weight of on-vehicle battery, and be easy to cause sensor impaired because of violation operation this moment.
According to DE 102004051489A1 and DE 102004055848A1, battery sensor can have multiple different make, such as the current sense resistor of low resistance or consist of in the terminals independently element or weld together with terminals.But there is the problem of the complicated and mechanical Lack of support of production technology in the battery sensor of this structure.
Summary of the invention
Therefore, for the problems referred to above the present invention has been proposed.
The present invention requires to realize improved purpose according to principal right.
The present invention preferentially designs for on-vehicle battery, but also is applicable to the battery of other types simultaneously.The explanation of this external demand, the present invention is unrestricted aspect battery capacity and voltage, and both has been applicable in principle rechargeable battery, also is applicable to non-rechargeable battery.
Consistent with the prior art level is that terminals of the present invention also are to be made by conductive material, and can be installed on some electrodes of battery, in order to set up electronics and the connection of being connected between terminals and battery electrode.For the benefit of operation preferentially is installed in terminals on the earth terminal of battery, but also terminals can be installed on the voltage pole of battery in principle.
In addition, the present invention also has a low resistance current sense resistor that is used for measuring battery current.When battery current passes through current sense resistor, can calculate according to the voltage drop that produces the electric current of battery according to Ohm law.For example, the present invention can use the current sense resistor described in the EP 605800A1, but the present invention also can utilize the current sense resistor of other types in principle.
Terminals of the present invention have a plurality of tongue pieces of outwards giving prominence to, and are used for fixed current and detect resistance.Current sense resistor obtain the machinery of this form fixing after, more foregoing traditional structure possesses larger mechanical resistance properties.
Term used in the present invention " tongue piece " preferentially uses the fixture of strip, preferentially installs or be molded in a side of terminals, and each tongue piece preferably has rectangular cross section, but the present invention also can adopt the tongue piece with other cross-sectional shape.
The best integral body of each tongue piece is placed on the terminals, and its core made by the material identical with terminals, so just in a kind of simple again economic mode tongue piece and terminals is coupled together.
Have at least in a preferred embodiment of the invention a tongue piece outwards to conduct electricity on the terminals, in order to couple together with the interface of current sense resistor, particularly can or be brazed together this conduction tongue piece and current sense resistor melting welding.That is to say, this conduction tongue piece has the dual-use function on machinery and the circuit, and the machinery that namely is used on the one hand current sense resistor is fixed, and realizes that on the other hand the electricity of current sense resistor is connected.
In addition, in a preferred embodiment of the invention, having a tongue piece on the terminals at least is External Insulation, is connected with current sense resistor to avoid this tongue piece, otherwise can causes the current sense resistor short circuit.That is to say, the electrical isolation tongue piece on the terminals only is used for the machinery of current sense resistor to be fixed, and does not have the circuit linkage function.
In a preferred embodiment of the invention, terminals have tight each a slice of electrical isolation tongue piece around current sense resistor upside and downside at least.The advantage of this structure is usually not connect wire owing to not connecting the interface of terminals on the current sense resistor, so this interface just can bear larger mechanicals efforts.If this interface is subject to acting force upwards, then described power is born and is derived by the terminals tongue piece that is arranged on the current sense resistor upside; If this interface is subject to downward acting force, then described power is born and is derived by the terminals tongue piece that is arranged on the current sense resistor downside.
In addition, electronic measurement circuit that the present invention is also built-in is used for measuring the voltage drop of current sense resistor and further extrapolates battery current.For example, can use the metering circuit such as EP 1030185A2 or EP 1363131A1 description, but also be not limited to this metering circuit structure.
In a preferred embodiment, the present invention has a circuit board that is used for settling metering circuit, and this circuit board directly is placed in the current sense resistor upside.
It is favourable will directly being placed on the current sense resistor with the circuit board of metering circuit, because on the one hand Stability Analysis of Structures, inductance are very low.
On the other hand, good thermo-contact is arranged between circuit board and current sense resistor, can be down to the impact of thermoelectric voltage minimum thus.
In a preferred embodiment of the invention, the circuit board downside has two voltage branch/contacts that are used for measuring resistance voltage, and these two contacts are connected with two interfaces of current sense resistor respectively, especially can connect by soldering.Metering circuit (for example ASIC:Application Specific Integrated Circuit, special IC) preferably is placed in the circuit board upside, but also can be placed in the circuit board downside.
The supply voltage of the metering circuit that the present invention, particularly the present invention are built-in (usually namely cell voltage) is preferentially inputted via voltage input end.In addition, the present invention can also measure supply voltage by metering circuit.In other words, in a preferred embodiment, the present invention not only can measure battery current, can also measure cell voltage.
In addition, the present invention also has a data output terminal, so that can outputting measurement value (such as battery current, cell voltage etc.).
In a preferred embodiment, data output end and voltage input end can be placed in the same wedge contact, have so just simplified the circuit structure of battery sensor.
Data output end has the data bus of a numeral, controller local area network's bus (CAN-bus for example, Controller Area Network bus) or local interconnect network bus (LIN-bus, Local Interconnect Network bus).But the present invention is being not limited to above bus type aspect the data structure of data output end, also can use other bus types parallel or serial.
In addition, the present invention also has a temperature measuring equipment, can measure various temperature or temperature difference.
On the one hand, this temperature measuring equipment can be measured the temperature of current sense resistor, in order to can consider the resistance value fluctuation of the current sense resistor that is caused by temperature when measuring battery current.Do so very usefully, because when calculating battery current according to Ohm law, the resistance value of current sense resistor is must known parameter value.
On the other hand, this temperature measuring equipment can be measured the temperature difference between each interface of current sense resistor.Do so very useful because temperature difference can produce little thermoelectric voltage, thus the distortion that further causes voltage measurement and battery current to be measured.
In a preferred embodiment, the present invention has the plastic casing of an electrical isolation, in current sense resistor, circuit board, metering circuit, wedge contact, temperature measuring equipment and/or terminals tongue piece must be wrapped in wholly or in part.
In a preferred embodiment of the invention, plastic casing and tongue piece one machinery that is used from current sense resistor is fixed.That is to say, tongue piece only has to combine with plastic casing could realize its mechanical fixation function, so tongue piece needn't nestle up current sense resistor in order to reach fixation.But the present invention also can directly abut in tongue piece on the current sense resistor, thereby does not rely on plastic casing and realize independently the mechanical fixation function of current sense resistor.
Preferably, above plastic casing is made by thermosetting plastic, and its reason is many-sided.The first, thermosetting plastic can be attached on the metal well, is convenient to make.The second, even if thermosetting plastic and the current sense resistor metal between transitional region good damp proof impermeability is also arranged.The 3rd, the thermal expansivity of thermosetting plastic and the thermal expansivity of metal are suitable, the problem that is caused by temperature variation therefore can not occur.The 4th, the mechanical resistance properties of thermosetting plastic is higher than other plastics, also can further improve thus mechanical load-bearing capacity of the present invention.The 5th, thermosetting plastic is the liquid state of high flow when sealing injection moulding, therefore can not damage electronic component, and the thermoplastics situation is not so just.At last, use thermosetting plastic can simplify manufacture process, get final product because plastic casing only need be sealed injection moulding simply.
The present invention is being not limited only to thermosetting plastic aspect the material of plastic casing, also can utilize other plastics in principle, as long as possess the characteristics of heat conductivity, and thermal expansion character is identical with the thermal expansion character of circuit board, current sense resistor and/or metering circuit.
Need to prove, in a preferred embodiment, one of two tabular interfaces of current sense resistor will stretch out plastic casing, and this outstanding interface is power interface, in order to import or derive battery current.
Also it should be noted that, the present invention is not limited only to the battery sensor of the independent member of above-described conduct, and comprises battery, and battery sensor of the present invention namely is placed in the battery upside.
Description of drawings
Other advantages of the present invention also can further be set forth at dependent claims or below in conjunction with preferred embodiment with reference to the accompanying drawings.Following legend has been showed:
Fig. 1 decomposition view of the present invention,
Fig. 2 A terminals skeleton view of the present invention,
Fig. 2 B terminals skeleton view of the present invention has been installed current sense resistor in the terminals,
The skeleton view of a certain installation steps of Fig. 2 C has wherein been installed the circuit board with metering circuit on the current sense resistor,
The a certain installation steps of Fig. 2 D have wherein connected a wedge contact on the circuit board,
Skeleton view of the present invention after Fig. 2 E installation.
Each accompanying drawing has been showed battery sensor 1 of the present invention (seeing Fig. 2 E), and this battery sensor can be used for measuring the electric current (charging current or discharge current) of conventional motor vehicle battery.
Embodiment
For this reason, battery sensor 1 is built-in with terminals 2, and these terminals are inserted on the earth terminal of motor vehicle battery, and is fixed on the earth terminal by bolt flange 3, sets up electronics and mechanical connection at the earth terminal of terminals 2 and motor vehicle battery thus.
According to four known line technologies, measure battery current by the current sense resistor 4 of low resistance.Current sense resistor 4 can be traditional make, as described in EP 0605800A1.Current sense resistor 4 by the low resistance electric resistance alloy (for example has two tabular interfaces 5 of being made by conductive material (for example copper or aldary), 6 and one
) the identical tabular resistive element 7 certainly done, resistive element 7 is positioned in the current path between the interface 5,6, thereby so that battery current imports via interface 5,6 or derived current detects resistance, and from the resistive element 7 of low resistance, pass through.That is to say, can be according to the voltage drop of the resistive element 7 of low resistance, calculate battery electric quantity by current sense resistor 4 according to Ohm law.
For current sense resistor 4 is fixed in terminals 2, terminals 2 have three tongue pieces 8,9,10, and these tongue pieces are integrally molded on the terminals 2, and extend laterally in parallel to each other terminals 2.
Two other tongue piece 8 of terminals 2,9 machineries that only are used for current sense resistor 4 are fixed.Like this, tongue piece 9 plays supporting role at the downside of current sense resistor 4, and tongue piece 8 places the upside of current sense resistor 4, and such two tongue pieces 8,9 have been fixed current sense resistor 4 simultaneously at upside and downside.
Shown in Fig. 2 C and 2D, settled a circuit board 11 with the metering circuit (not shown) at the current sense resistor upside, circuit board 11 downsides have two voltage branch contacts, and these two contacts link to each other with two interfaces 5,6 of current sense resistor 4 by soldering.Like this, two of circuit board 11 voltage drops that contact can be measured current sense resistor 4.The metering circuit that is positioned on circuit board 11 upsides links to each other with two contacts by corresponding wire, can measure thus the voltage drop of current sense resistor 4 interior resistive elements 7.In addition, circuit board 11 also has a unillustrated earthing contact.
In addition, battery sensor 1 of the present invention also has wedge contact 12, and this wedge contact has two functions.
On the one hand, the cell voltage of motor vehicle battery is by wedge contact 12 inputs, and this voltage can be measured by the metering circuit that is arranged on the circuit board 11, also is used for simultaneously to battery sensor 1 power supply.
On the other hand, wedge contact 12 also comprises the data output end of controller local area network's bus (CAN-bus:Controller Area Network bus) or local interconnect network bus (LIN-bus:Local Interconnect Network bus), so that the data that the output metering circuit is measured.
The plastic casing 13 of being made by thermosetting plastic is significant, in this plastic casing is wrapped in current sense resistor 4, tongue piece 8-10, circuit board 11 and wedge contact 12.
Plastic casing is used for the external hermetic seal of electrical isolation of battery sensor 1 on the one hand.
On the other hand, plastic casing 13 is also fixed for the machinery of battery sensor 1.The interface 5 of current sense resistor 4 stretches out from plastic casing 13.Like this, the mechanical force that acts on the interface 5 is not only born by two tongue pieces 8,9, also born by plastic casing 13, so plastic casing has mechanical fixation function equally.In addition, plastic casing 13 filled up between the tongue piece 8,9 and and current sense resistor 4 between the space fix so that tongue piece 8,9 also can reach the machinery of current sense resistor 4.
Also need point out at this, be arranged on metering circuit on the circuit board 11 and also can measure temperature difference between two interfaces 5,6 of current sense resistor 4.Its advantage is to calculate the measured value fluctuation that causes because of thermoelectric voltage, and this thermoelectric voltage is because the temperature difference between the interface 5,6 of current sense resistor produces.
In addition, be arranged on the temperature that temperature measuring equipment on the circuit board 11 also can be measured current sense resistor 4.Its meaning is, because the resistance value of the resistive element 7 of current sense resistor 4 can produce along with temperature variation slightly fluctuation.By the temperature of measuring resistance element 7, can calculate the change in resistance that temperature fluctuation causes.
The present invention is not limited only to embodiment described above, also can spread out and stretch out multiple improvement and change programme.These improve and change programme has been used design of the present invention equally, therefore also belong in the scope of patent protection.In addition, the present invention is content and the feature in the claimed dependent claims also, and the content characteristic during this protection requires with related right is irrelevant.Therefore, the design such as plastic casing also belongs in protection scope of the present invention.
Claims (15)
- One kind be used for battery, especially for the battery sensor (1) of on-vehicle battery, haveA) terminals of being made by conductive material (2) are used for described battery sensor (1) is connected electrically in the connecting terminal of described battery, particularly is connected to the earthing contact of described battery,B) current sense resistor of low resistance (4), for the battery current in order to discharge or charging of measuring described battery,It is characterized in that,C) have from the outstanding a plurality of tongue pieces (8-10) of described terminals (2), be used for described current sense resistor (4) is mechanically remained on described terminals (2).
- 2. battery sensor according to claim 1 (1) is characterized in that, described tongue piece (8-10) is molded on the described terminals (2) integratedly.
- 3. according to the described battery sensor of one of the claims (1), it is characterized in that, at least one tongue piece (10) in the described tongue piece of described terminals (2) is conduction outwards, so as particularly by with the interface melting welding of this tongue piece (10) and described current sense resistor (4) or be brazed together and with interface (6) the electricity connection of described current sense resistor (4).
- 4. according to the described battery sensor of one of the claims (1), it is characterized in that,A) the external electrical isolation of at least one tongue piece in the described tongue piece (8-10) of described terminals (2) is connected to avoid this tongue piece and described current sense resistor (4) electricity, and/orB) the external electrical isolation and around the upside of described current sense resistor (4) and the downside of described current sense resistor (4) of two tongue pieces (8,9) of described terminals (2).
- 5. according to the described battery sensor of one of the claims (1), it is characterized in that having electronic measurement circuit, described electronic measurement circuit is used for measuring the voltage of described current sense resistor (4) and further extrapolates battery current.
- 6. battery sensor according to claim 5 (1) is characterized in that,A) have be used to the circuit board of settling described electronic measurement circuit (11), and/orB) described circuit board (11) directly is placed in described current sense resistor (4) upside, and/orC) described circuit board (11) downside has the voltage branch/contact be used to the voltage of measuring described current sense resistor (4), two contacts of this of described circuit board (11) especially can be connected electrical connection by soldering with two interfaces of described current sense resistor (4), and/orD) described metering circuit is placed in described circuit board (11) upside.
- 7. according to claim 5 or 6 described battery sensors (1), it is characterized in that,A) described battery sensor (1) has voltage input end, and described voltage input end is used for the feed-in supply voltage, and/orB) described metering circuit is supplied electric energy by the supply voltage of inputting by described voltage input end, and/orC) described metering circuit is not only measured battery current, also measures the supply voltage by described voltage input end input.
- 8. according to the described battery sensor of one of the claims (1), it is characterized in that,A) described battery sensor (1) has data output end, so that outputting measurement value, and/orB) described data output end and voltage input end are placed in the same wedge contact (12), and/orC) described data output end has data bus, particularly controller local area network's bus or the local interconnect network bus of numeral.
- 9. according to the described battery sensor of one of the claims (1), it is characterized in that having be used to the temperature of measuring described current sense resistor (4) and/or be used for measuring the temperature measuring equipment of the temperature difference between each interface of described current sense resistor (4).
- 10. battery sensor according to claim 9 (1) is characterized in that,A) described metering circuit is calculated the thermoelectric voltage of described current sense resistor (4) and consider described thermoelectric voltage when being measured battery current according to the temperature difference of the described current sense resistor (4) that records, and/orB) resistance variations that caused by heat according to the temperature computation of the described current sense resistor (4) that records of described metering circuit and when measuring battery current, consider the described resistance variations that is caused by heat.
- 11. according to the described battery sensor of one of the claims (1), it is characterized in that, in plastic casing (13) with electrical isolation, described plastic casing (13) are wrapped in the tongue piece (8-10) of described current sense resistor (4), circuit board (11), metering circuit, wedge contact (12), temperature measuring equipment and/or terminals (2).
- 12. battery sensor according to claim 11 (1) is characterized in that,A) described plastic casing (13) is made by thermosetting plastic, and/orB) tongue piece (8-10) of described current sense resistor (4), described circuit board (11), described metering circuit, described wedge contact (12), described temperature measuring equipment and/or described terminals (2) is sealed injection moulding with thermosetting plastic, and/orC) described plastic casing (13) is made by the plastics that basically have the thermal expansion character identical with described circuit board (11) and/or described metering circuit, and/orD) described plastic casing (13) is made by the plastics of energy heat conduction, and/orE) in two interfaces of described current sense resistor (4) partly stretches out described plastic casing (13), and this interface that stretches out is power interface, in order to import or derive battery current.
- 13. according to the described battery sensor of one of the claims (1), it is characterized in that,A) described current sense resistor (4) has the tabular first interface (6) of being made by a kind of conductor material and tabular the second interface (5) of being made by described conductor material,B) described current sense resistor (4) has the tabular resistive element (7) of being made by electric resistance alloy,C) described resistive element (7) is arranged in the current path between two interfaces (5,6),D) described conductor material has the specific electrical resistance less than described electric resistance alloy.
- 14. battery sensor according to claim 13 (1) is characterized in that,A) first tongue piece (10) of described terminals (2) is from the first interface (6) of the described current sense resistor of following mechanical support (4),B) first tongue piece (10) of described terminals (2) electricity is connected the first interface (6) of described current sense resistor (4),C) second interface (5) of described current sense resistor (4) consists of power interface, in order to import or derive battery current,D) second tongue piece (9) of described terminals (2) is from the described current sense resistor of lower surface bearing (4),E) the 3rd tongue piece (8) of described terminals (2) is from the described current sense resistor of upper surface bearing (4),F) the external electrical isolation of second tongue piece (9) of described terminals (2) and the 3rd tongue piece (8) is connected described current sense resistor (4) to avoid electricity,G) described the second tongue piece (9) and described the 3rd tongue piece (8) are bearing between two interfaces (5,6), in order to bear as the mechanical load on second interface (5) of power interface.
- 15. a battery, particularly on-vehicle battery have two connecting terminals, it is characterized in that, are installed on the described connecting terminal, particularly are installed on the earth terminal of battery according to the described battery sensor of one of the claims (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011111081.3 | 2011-08-18 | ||
| DE102011111081.3A DE102011111081B4 (en) | 2011-08-18 | 2011-08-18 | Battery sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102955132A true CN102955132A (en) | 2013-03-06 |
| CN102955132B CN102955132B (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210295892.3A Active CN102955132B (en) | 2011-08-18 | 2012-08-17 | Battery sensor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102955132B (en) |
| DE (1) | DE102011111081B4 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180005904A (en) * | 2016-07-07 | 2018-01-17 | 현대모비스 주식회사 | Combination structure of battery sensor module for vehicle |
| CN108107288A (en) * | 2017-11-17 | 2018-06-01 | 成都新泰高科技术有限公司 | Vehicular Fault Diagnosis of Construction Machinery instrument |
| CN108226578A (en) * | 2016-12-12 | 2018-06-29 | 大陆汽车有限公司 | For the tightening member of battery sensor arrangement |
| CN108700616A (en) * | 2015-11-27 | 2018-10-23 | 罗伯特·博世有限公司 | Current sensor and battery with this current sensor |
| CN110785667A (en) * | 2017-04-28 | 2020-02-11 | 株式会社杰士汤浅国际 | Current detection device, management device, and battery for starting engine |
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| DE102014207756A1 (en) * | 2014-04-24 | 2015-10-29 | Continental Automotive Gmbh | Shunt current measurement with temperature compensation |
| DE102015218796A1 (en) * | 2015-07-10 | 2017-01-12 | Continental Automotive Gmbh | Battery sensor unit with integrated resistance element |
| DE102017217866A1 (en) * | 2017-10-09 | 2019-04-11 | Robert Bosch Gmbh | Batteriepolklemmenanordnung |
| DE102019209182A1 (en) * | 2019-06-25 | 2020-12-31 | Continental Automotive Gmbh | Battery sensor and method for making a battery sensor |
| DE102021209116A1 (en) | 2021-08-19 | 2023-02-23 | Robert Bosch Gesellschaft mit beschränkter Haftung | Arrangement for connecting a battery sensor to a positive pole of a battery |
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| DE102009029381A1 (en) | 2009-09-11 | 2011-03-24 | Robert Bosch Gmbh | Surface mark and/or label for forming on e.g. duroplast material of housing of battery sensor in motor vehicle, has smooth and/or glow area provided in dull or rough environment, where label is formed on material of housing using mold |
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2012
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102011111081A1 (en) | 2013-02-21 |
| CN102955132B (en) | 2015-05-13 |
| DE102011111081B4 (en) | 2021-08-05 |
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