CN201828652U - Quick voltage and temperature acquisition system for battery management system - Google Patents
Quick voltage and temperature acquisition system for battery management system Download PDFInfo
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- CN201828652U CN201828652U CN2010205791707U CN201020579170U CN201828652U CN 201828652 U CN201828652 U CN 201828652U CN 2010205791707 U CN2010205791707 U CN 2010205791707U CN 201020579170 U CN201020579170 U CN 201020579170U CN 201828652 U CN201828652 U CN 201828652U
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- voltage
- temperature
- sampling
- management system
- battery management
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Abstract
The utility model discloses a quick voltage and temperature acquisition system for a battery management system, which relates to quick voltage and temperature acquisition systems and solves the problems of the conventional battery management system that the sampling speed to the voltage of a battery is slow and the sampling electromagnetic interference resistance capacity is poor. A thermal resistor of the quick voltage and temperature acquisition system for the battery management system acquires and outputs a temperature signal of a battery pack to a sampling chip; the sampling chip acquires the voltage between two ends of every single battery in the battery pack; the sampling chip outputs the temperature signal and a voltage signal to a singlechipsingle chip computer; and the singlechipsingle chip computer outputs the temperature signal and the voltage signal to a management host of the battery management system by a controller area network (CAN) communication circuit. The quick voltage and temperature acquisition system for the battery management system is applicable to the quick acquisition of the voltage and the temperature of the battery management system.
Description
Technical field
The present invention relates to a kind of voltage and temperature Fast Acquisition System.
Background technology
Along with the growing tension of world petroleum resource and the continuous deterioration of environmental pollution, the electric automobile of energy-conserving and environment-protective has become the industry with strategic importance of worldwide attention.The lithium ion battery group is as the main source of electric powered motor, and the stability of its work directly influences the performance of car load.At present because technology may cause burning or blast if lithium ion battery overcharges; If over-discharge can cause battery failure, therefore in the process of using, must carry out monitoring management to lithium ion battery, promptly must use battery management system.High-power electric automobile batteries management system all is made up of master controller, some voltage and temperature collect module and a current module at present.Wherein the quick acquisition module of voltage and temperature is the main test section of battery parameter, the performance of its performance decision pond management system.
There are following shortcoming in voltage and temperature acquisition subsystem in the existing battery management system: 1, adopting chip is technical grade, poor anti jamming capability; 2, battery voltage sampling adopts a plurality of optoisolator spares, and sample rate is slow, and the trouble spot is many; 3, do not have holding circuit, high pressure or misconnection cause acquisition module to damage; 4, do not have rational balanced measure, can't improve, thereby influence serviceable life of battery for the phenomenon of battery capacity consistance variation; 5, acquisition module needs the outside that power work is provided, and because of needs additional power supply line, if power lead goes wrong, module can not be worked.
The utility model content
The utility model is that the sample rate to cell voltage that exists in the existing battery management system is slow, the problem of sampling anti-electromagnetic interference capability difference in order to solve, thereby voltage and the temperature Fast Acquisition System that is used for battery management system is provided.
The voltage and the temperature Fast Acquisition System that are used for battery management system, it comprises CAN communicating circuit, single-chip microcomputer and N group voltage and temperature sampling module, the structure of described N group voltage and temperature sampling module is identical, every group of voltage and all corresponding voltage and the temperature signal of gathering an electric battery of temperature sampling module; Described every group of voltage and temperature sampling module include sampling A and thermistor, and described thermistor is used to gather the temperature of electric battery, and the temperature signal output terminal of described thermistor is connected with the temperature signal input end of sampling A; Sampling A is gathered the both end voltage of each cell in the electric battery; The voltage and the temperature signal output terminal of each sampling A in N group voltage and the temperature sampling module all are connected with the voltage and the temperature signal input end of single-chip microcomputer, the signal output part of described single-chip microcomputer is connected with the signal input part of CAN communicating circuit, and the signal input part of described CAN communicating circuit is connected with the signal input part of the management host of battery management system; N is a positive integer.
The utility model adopts specialized voltages and temperature sampling chip to realize the collection of battery pressure and temperature, and anti-electromagnetic interference capability is strong, picking rate is fast.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Embodiment one, this embodiment is described in conjunction with Fig. 1, the voltage and the temperature Fast Acquisition System that are used for battery management system, it comprises CAN communicating circuit 1, single-chip microcomputer 2 and N group voltage and temperature sampling module, the structure of described N group voltage and temperature sampling module is identical, every group of voltage and all corresponding voltage and the temperature signal of gathering an electric battery 7 of temperature sampling module; Described every group of voltage and temperature sampling module include sampling A 3 and thermistor 6, and described thermistor 6 is used to gather the temperature of electric battery 7, and the temperature signal output terminal of described thermistor 6 is connected with the temperature signal input end of sampling A 3; The both end voltage that sampling A 3 is gathered each cell in the electric battery 7; The voltage and the temperature signal output terminal of each sampling A 3 in N group voltage and the temperature sampling module all are connected with the voltage and the temperature signal input end of single-chip microcomputer 2, the signal output part of described single-chip microcomputer 2 is connected with the signal input part of CAN communicating circuit 1, and the signal input part of described CAN communicating circuit 1 is connected with the signal input part of the management host of battery management system; N is a positive integer.
The temperature signal that voltage signal in the electric battery of the present utility model and thermistor 6 are gathered is given single-chip microcomputer 2 by sampling A 3 and is carried out computing, monitoring, give the main frame of management system by CAN communication circuit 1 again, thereby realize the voltage of electric battery and the collection of temperature.
Present embodiment adopts the CAN bus to carry out communication, and communication speed is fast, and has stronger antijamming capability.
Embodiment two, this embodiment and embodiment one be described to be used for the voltage of battery management system and the difference of temperature Fast Acquisition System is, every group of voltage and temperature sampling module also comprise M equalizing circuit 8, the quantity of the cell in the value of described M and the electric battery 7 equates that described each equalizing circuit 8 is all in parallel with the cell in the electric battery 7; The equalizing signal output terminal of described each equalizing circuit 8 all is connected with the equalizing signal input end of single-chip microcomputer 2.
Adopt equalizing circuit in the present embodiment, can guarantee the consistance of battery, increase the service life according to the parameters such as internal resistance, capacity and temperature of battery to battery balanced.
Embodiment three, this embodiment and embodiment one or two describedly are used for the voltage of battery management system and the difference of temperature Fast Acquisition System is; every group of voltage and temperature sampling module also comprise holding circuit 5, and described holding circuit 5 is connected between sampling A 3 and the electric battery 7.
Holding circuit in the present embodiment is used for sampling A 3 is protected, and prevents because the sampling A damage that faulty operations such as misconnection cause.
Embodiment four, this embodiment and embodiment three be described to be used for the voltage of battery management system and the difference of temperature Fast Acquisition System is, it also comprises power circuit 4, and the power supply signal output terminal of described power circuit 4 is connected with the power supply signal input end of single-chip microcomputer 2.
Independent of single-chip microcomputer 2 power supplies in this embodiment by power circuit, and then be sampling A 3 power supplies, need not externally fed, reduced system power dissipation, reduce the quantity of wire harness, further increased the reliability of system.
Embodiment five, this embodiment and embodiment one, two or four be described to be used for the voltage of battery management system and the difference of temperature Fast Acquisition System is, it also comprises the CAN bus, is connected by the CAN bus between CAN communicating circuit 1 and the single-chip microcomputer 2.
Embodiment six, this embodiment and embodiment five be described to be used for the voltage of battery management system and the difference of temperature Fast Acquisition System is, sampling A 3 is that model is the sampling A of BQ76PL536.
The sampling A 3 of present embodiment adopts the special-purpose sampling A BQ76PL536 of electric automobile, and its anti-electromagnetic interference capability is strong, picking rate is fast.Microprocessor adopts the highly reliable chip of automotive grade.
Claims (6)
1. the voltage and the temperature Fast Acquisition System that are used for battery management system, it is characterized in that: it comprises CAN communicating circuit (1), single-chip microcomputer (2) and N group voltage and temperature sampling module, the structure of described N group voltage and temperature sampling module is identical, every group of voltage and all corresponding voltage and the temperature signal of gathering an electric battery (7) of temperature sampling module; Described every group of voltage and temperature sampling module include sampling A (3) and thermistor (6), described thermistor (6) is used to gather the temperature of electric battery (7), and the temperature signal output terminal of described thermistor (6) is connected with the temperature signal input end of sampling A (3); Sampling A (3) is gathered the both end voltage of each cell in the electric battery (7); The voltage and the temperature signal output terminal of each sampling A (3) in N group voltage and the temperature sampling module all are connected with the voltage and the temperature signal input end of single-chip microcomputer (2), the signal output part of described single-chip microcomputer (2) is connected with the signal input part of CAN communicating circuit (1), and the signal input part of described CAN communicating circuit (1) is connected with the signal input part of the management host of battery management system; N is a positive integer.
2. voltage and the temperature Fast Acquisition System that is used for battery management system according to claim 1, it is characterized in that every group of voltage and temperature sampling module also comprise M equalizing circuit (8), the quantity of the cell in the value of described M and the electric battery (7) equates that described each equalizing circuit (8) is all in parallel with the cell in the electric battery (7); The equalizing signal output terminal of described each equalizing circuit (8) all is connected with the equalizing signal input end of single-chip microcomputer (2).
3. voltage and the temperature Fast Acquisition System that is used for battery management system according to claim 1 and 2; it is characterized in that every group of voltage and temperature sampling module also comprise holding circuit (5), described holding circuit (5) is connected between sampling A (3) and the electric battery (7).
4. voltage and the temperature Fast Acquisition System that is used for battery management system according to claim 3 is characterized in that it also comprises power circuit (4), and the power supply signal output terminal of described power circuit (4) is connected with the power supply signal input end of single-chip microcomputer (2).
5. according to claim 1,2 or 4 described voltage and the temperature Fast Acquisition System that are used for battery management system, it is characterized in that it also comprises the CAN bus, be connected by the CAN bus between described CAN communicating circuit (1) and the single-chip microcomputer (2).
6. voltage and the temperature Fast Acquisition System that is used for battery management system according to claim 5 is characterized in that sampling A (3) is that model is the sampling A of BQ76PL536.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205791707U CN201828652U (en) | 2010-10-27 | 2010-10-27 | Quick voltage and temperature acquisition system for battery management system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205791707U CN201828652U (en) | 2010-10-27 | 2010-10-27 | Quick voltage and temperature acquisition system for battery management system |
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| CN201828652U true CN201828652U (en) | 2011-05-11 |
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| CN2010205791707U Expired - Fee Related CN201828652U (en) | 2010-10-27 | 2010-10-27 | Quick voltage and temperature acquisition system for battery management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275524A (en) * | 2011-06-30 | 2011-12-14 | 奇瑞汽车股份有限公司 | Diagnostic system and diagnostic method for power battery packs |
| CN106785151A (en) * | 2016-12-16 | 2017-05-31 | 奇瑞汽车股份有限公司 | A kind of batteries of electric automobile information acquisition module makeup is put |
-
2010
- 2010-10-27 CN CN2010205791707U patent/CN201828652U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275524A (en) * | 2011-06-30 | 2011-12-14 | 奇瑞汽车股份有限公司 | Diagnostic system and diagnostic method for power battery packs |
| CN106785151A (en) * | 2016-12-16 | 2017-05-31 | 奇瑞汽车股份有限公司 | A kind of batteries of electric automobile information acquisition module makeup is put |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20141027 |
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| EXPY | Termination of patent right or utility model |