CN103475047A - Battery pack management and control circuit - Google Patents

Battery pack management and control circuit Download PDF

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Publication number
CN103475047A
CN103475047A CN2013103756213A CN201310375621A CN103475047A CN 103475047 A CN103475047 A CN 103475047A CN 2013103756213 A CN2013103756213 A CN 2013103756213A CN 201310375621 A CN201310375621 A CN 201310375621A CN 103475047 A CN103475047 A CN 103475047A
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CN
China
Prior art keywords
circuit
battery
battery pack
chip microcomputer
parameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2013103756213A
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Chinese (zh)
Inventor
李浩明
贾海江
何斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Santroll Electric Automobile Technology Co Ltd
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Tianjin Santroll Electric Automobile Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianjin Santroll Electric Automobile Technology Co Ltd filed Critical Tianjin Santroll Electric Automobile Technology Co Ltd
Priority to CN2013103756213A priority Critical patent/CN103475047A/en
Publication of CN103475047A publication Critical patent/CN103475047A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a battery pack management and control circuit. The battery pack management and control circuit comprises a single chip microcomputer, an isolated voltage acquisition circuit, an electronic switch circuit, a pre-charging circuit, a low-voltage direct-current power supply and a battery pack, wherein the low-voltage direct-current power supply is connected to a key switch which is connected to the electronic switch circuit; the electronic switch circuit is connected to the single chip microcomputer in series; the single chip microcomputer is connected to the isolated voltage acquisition circuit, a first CAN (Controller Area Network) bus and a second CAN bus; the first CAN bus is connected to a whole controller; the second CAN bus is connected to a battery information acquisition card. The battery pack management and control circuit disclosed by the invention has the advantages that the defects in the prior art are overcome, through cooperation of digital isolated acquisition and acquisition card and CAN buses communication acquisition, the safety performance of the battery pack of an automobile is effectively improved, and the accuracy and the stability of management and monitoring are improved.

Description

A kind of battery set management control circuit
Technical field
The invention belongs to electronic circuit field, be specifically related to the management control circuit of the battery pack of a kind of applicable pure electric automobile or hybrid vehicle.
Background technology:
Along with developing rapidly of new-energy automobile industry, the battery management technology also becomes developing focus.In order to meet the actual motion demand of pure electric automobile or hybrid vehicle, battery management system is all had higher requirement at aspects such as function, reliability and stability and practicality.Context of detection, majority takes the analog switch original paper to be switched battery at present, then utilize analog to digital conversion circuit to carry out voltage acquisition, although acquisition precision and security performance can meet vehicle operating and battery instructions for use, but physical circuit complexity, the software amount is large, not only the estimation of battery status, the monitoring of battery performance is exerted an influence, and has also improved greatly product development cycle and cost.So existing battery management control circuit need to the property improved design.
Summary of the invention:
The objective of the invention is to overcome deficiency of the prior art, providing a kind of isolates and gathers and in conjunction with the collection of capture card CAN bus communication by numeral, thereby effectively promote the security performance of automobile batteries group, the battery management control circuit of the Stability and veracity of management and monitoring.
Its technical scheme is:
Comprise that single-chip microcomputer, isolation gather potential circuit, electronic switching circuit, electronic switching circuit, pre-charge circuit, low-voltage dc power supply, battery pack; Low-voltage dc power supply is connected to key switch, and key wants switch to be connected to electronic switching circuit, and electronic switching circuit is connected serially to single-chip microcomputer, single-chip microcomputer; Single-chip microcomputer is connected to isolation and gathers potential circuit, a CAN bus, the 2nd CAN bus, and a CAN bus is connected to entire car controller, and the 2nd CAN bus is connected to the battery information capture card.
The battery information capture card is connected to battery pack and gathers the voltage parameter of each battery, the temperature parameter of each battery.
After the key switch closure, electronic switching circuit detects key signal closed, and the low-voltage dc power supply output current is given respectively and powered to single-chip microcomputer, isolation voltage Acquisition Circuit, battery capture card, pre-charge circuit after key switch and electronic switching circuit.
Single-chip microcomputer is connected to memory, memory is E2PROM memory or FLASH memory, electronic switching circuit is the universal electric switching circuit, as controlled the structure of the break-make of field effect transistor by latching circuit, when low-voltage dc power supply cuts off the power supply, electronic switch is realized postponing outage, and single-chip microcomputer is saved to memory by received various information.
The isolation voltage Acquisition Circuit is general isolation voltage Acquisition Circuit, be specially digital isolation voltage Acquisition Circuit, the isolation voltage Acquisition Circuit is connected to pre-charge circuit, insulation resistance, and be connected to battery pack by current sensor, gather the information parameter from pre-charge circuit, insulation resistance parameter, battery pack; The total current value parameter that wherein state parameter of battery pack is battery pack, the SOC state-of-charge of reaction cell group; The value that the insulation resistance state parameter is insulation resistance, the resistance of reaction insulation resistance; The voltage parameter that the state parameter of pre-charge circuit is pre-charge resistance, the power-up state of reaction pre-charge circuit, pre-charge circuit is arranged on the output bus of battery pack.
Than traditional battery management control circuit, the present invention has significant advantage and beneficial effect, is embodied as:
(1) the built-in pre-charge circuit of battery management control circuit of the present invention, the mode that simultaneously adopts the numeral isolation to gather gathers battery current, has guaranteed the precision of battery SOC estimation, has improved the security performance of battery and car load power consumption equipment.
(2) battery management control circuit of the present invention gathers each monomer battery voltage by capture card, but the capture card cascade, the quantity that gathers cell after cascade improves, and the total voltage scope increases, and increases the range of application of this battery management control circuit.
(3) battery management control circuit of the present invention adopts numeral isolation Acquisition Circuit and CAN communication interface technique can effectively improve antijamming capability and the stability of system.
The accompanying drawing explanation
Fig. 1 is the structure chart of battery pack control circuit of the present invention;
Embodiment
Narrate the specific embodiment of the present invention below in conjunction with accompanying drawing; below in conjunction with accompanying drawing, the embodiment of the present invention is further described; below just exemplary about the description of embodiments of the present invention; the claimed theme be not meant to limit the present invention; the variation of other that also exist for embodiment described in the invention in the claim protection range, all belong to the theme that will protect required for the present invention.
As shown in Figure 1, low-voltage dc power supply is connected to key switch, and key wants switch to be connected to electronic switching circuit, and electronic switching circuit is connected to single-chip microcomputer, single-chip microcomputer; Single-chip microcomputer is connected to isolation and gathers potential circuit, a CAN bus, the 2nd CAN bus, the one CAN bus is connected to entire car controller, the 2nd CAN bus is connected to the battery information capture card, and the battery information capture card is connected to battery pack and gathers the voltage parameter of each battery, the temperature parameter of each battery; Single-chip microcomputer also is connected to memory, and memory is E2PROM memory or FLASH memory, and electronic switching circuit is the universal electric switching circuit, as controlled the structure of the break-make of field effect transistor by latching circuit.
The isolation voltage Acquisition Circuit is general isolation voltage Acquisition Circuit, be specially digital isolation voltage Acquisition Circuit, the isolation voltage Acquisition Circuit is connected to pre-charge circuit, insulation resistance, and be connected to battery pack by current sensor, gather the information parameter from pre-charge circuit, insulation resistance parameter, battery pack; The total current value parameter that wherein state parameter of battery pack is battery pack, the SOC state-of-charge of reaction cell group; The value that the insulation resistance state parameter is insulation resistance, the resistance of reaction insulation resistance; The voltage parameter that the state parameter of pre-charge circuit is pre-charge resistance, the power-up state of reaction pre-charge circuit, pre-charge circuit is arranged on the output bus of battery pack.
The battery management control circuit is monitored voltage and the temperature parameter of all batteries and is carried out communication and control them with other unit in battery system, and its function is monitoring voltage, electric current, SOC state-of-charge and the maximum power of temperature, calculating battery; The failure condition of identification battery; The monitoring insulation status, and communicate through a CAN bus and entire car controller.Be specially, after the key switch closure, electronic switching circuit detects key signal closed, and the low-voltage dc power supply output current is given respectively and powered to single-chip microcomputer, isolation voltage Acquisition Circuit, battery capture card, pre-charge circuit after key switch and electronic switching circuit.Pre-charge circuit carries out precharge to the output bus of battery pack and powers on, and the isolation voltage Acquisition Circuit gathers the voltage signal of pre-charge circuit, and the voltage parameter collected is transferred to single-chip microcomputer; The isolation voltage Acquisition Circuit gathers the voltage signal of insulation resistance, and by the voltage parameter single-chip microcomputer of insulation resistance; The isolation voltage Acquisition Circuit is passed through the total current signal of current sensor battery pack, and the total current parameter of battery pack is transferred to single-chip microcomputer; Single-chip microcomputer is connected to the current acquisition card by the 2nd CAN bus, the battery capture card gathers magnitude of voltage and the temperature value of each cell, temperature value by each cell, settle in the temperature sensor collection, the quantity of current acquisition card is not limit, according to the number of the battery cell in battery pack, determine, if cell is too much, the battery capture card completes the collection to each all cell current parameters and temperature parameter by cascade, and the battery capture card transfers to single-chip microcomputer by the 2nd CAN bus by the current parameters of each cell and temperature parameter; Single-chip microcomputer is by processing the voltage parameter of pre-charge circuit, draw the precharge power-up state of battery power feeds, by processing the voltage parameter of insulation resistance, draw the state of insulation of battery system, by the voltage parameter for the treatment of of battery total current parameter, cell, operating state, SOC state-of-charge and the maximum power state that temperature parameter draws each cell.Single-chip microcomputer is connected with entire car controller by a CAN bus, and the state parameter of battery pack and entire car controller are communicated, and when low-voltage dc power supply cuts off the power supply, electronic switch postpones outage, and single-chip microcomputer is saved to memory by received various information.
Embodiments of the invention are example embodiment of the present invention; should be understood to is certain demonstrative example wherein in the protection range of claims of the present invention; there is the directiveness effect that those skilled in the art is realized to corresponding technical scheme, but not limitation of the invention.

Claims (5)

1. a battery management control circuit, is characterized in that: comprising: single-chip microcomputer, isolation collection potential circuit, electronic switching circuit, electronic switching circuit, pre-charge circuit, low-voltage dc power supply, battery pack; Low-voltage dc power supply is connected to key switch, and key wants switch to be connected to electronic switching circuit, and electronic switching circuit is connected serially to single-chip microcomputer, single-chip microcomputer; Single-chip microcomputer is connected to isolation and gathers potential circuit, a CAN bus, the 2nd CAN bus, and a CAN bus is connected to entire car controller, and the 2nd CAN bus is connected to the battery information capture card.
2. battery management control circuit according to claim 1, it is characterized in that: described battery information capture card is connected to battery pack and gathers the voltage parameter of each battery, the temperature parameter of each battery.
3. battery management control circuit according to claim 1, it is characterized in that: after comprising the key switch closure, electronic switching circuit detects key signal closed, and the low-voltage dc power supply output current is given respectively and powered to single-chip microcomputer, isolation voltage Acquisition Circuit, battery capture card, pre-charge circuit after key switch and electronic switching circuit.
4. battery management control circuit according to claim 1, it is characterized in that: described single-chip microcomputer is connected to memory, memory is E2PROM memory or FLASH memory, electronic switching circuit is the universal electric switching circuit, as controlled the structure of the break-make of field effect transistor by latching circuit, when low-voltage dc power supply cuts off the power supply, electronic switch is realized postponing outage, and single-chip microcomputer is saved to memory by received various information.
5. battery management control circuit according to claim 1, it is characterized in that: described isolation voltage Acquisition Circuit is general isolation voltage Acquisition Circuit, be specially digital isolation voltage Acquisition Circuit, the isolation voltage Acquisition Circuit is connected to pre-charge circuit, insulation resistance, and be connected to battery pack by current sensor, gather the information parameter from pre-charge circuit, insulation resistance parameter, battery pack; The total current value parameter that wherein state parameter of battery pack is battery pack, the SOC state-of-charge of reaction cell group; The value that the insulation resistance state parameter is insulation resistance, the resistance of reaction insulation resistance; The voltage parameter that the state parameter of pre-charge circuit is pre-charge resistance, the power-up state of reaction pre-charge circuit, pre-charge circuit is arranged on the output bus of battery pack.
CN2013103756213A 2013-08-26 2013-08-26 Battery pack management and control circuit Pending CN103475047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013103756213A CN103475047A (en) 2013-08-26 2013-08-26 Battery pack management and control circuit

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Application Number Priority Date Filing Date Title
CN2013103756213A CN103475047A (en) 2013-08-26 2013-08-26 Battery pack management and control circuit

Publications (1)

Publication Number Publication Date
CN103475047A true CN103475047A (en) 2013-12-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105068014A (en) * 2015-08-28 2015-11-18 江苏大学 Parallel single cell performance monitoring system and monitoring method
CN105874680A (en) * 2014-01-08 2016-08-17 罗伯特·博世有限公司 Battery management system for monitoring and regulating the operation of battery and battery system having such battery management system
CN107390571A (en) * 2017-06-19 2017-11-24 江苏大学 A kind of batteries of electric automobile packet system and its measure voltage & current method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2164153Y (en) * 1993-07-15 1994-05-04 昆明电子技术推广应用研究所 Multi-functional sound, light and hand controlling time-delay switch
CN1896892A (en) * 2006-04-10 2007-01-17 重庆大学 Management system of power battery for mixed-power automobile
CN102019888A (en) * 2009-09-10 2011-04-20 上海海马汽车研发有限公司 Controller and control method of pure electric vehicle
CN102320275A (en) * 2011-09-28 2012-01-18 重庆长安汽车股份有限公司 Power-off delay circuit of hybrid control unit for electric automobile
CN102501770A (en) * 2011-11-03 2012-06-20 中国科学院电工研究所 Electrical system for pure electric vehicle
CN102642480A (en) * 2012-05-02 2012-08-22 苏州市奥杰汽车技术有限公司 Vehicle control system of pure electric vehicle
CN202593301U (en) * 2012-04-05 2012-12-12 郑州宇通客车股份有限公司 Universal high-voltage safety control device for electric vehicle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2164153Y (en) * 1993-07-15 1994-05-04 昆明电子技术推广应用研究所 Multi-functional sound, light and hand controlling time-delay switch
CN1896892A (en) * 2006-04-10 2007-01-17 重庆大学 Management system of power battery for mixed-power automobile
CN102019888A (en) * 2009-09-10 2011-04-20 上海海马汽车研发有限公司 Controller and control method of pure electric vehicle
CN102320275A (en) * 2011-09-28 2012-01-18 重庆长安汽车股份有限公司 Power-off delay circuit of hybrid control unit for electric automobile
CN102501770A (en) * 2011-11-03 2012-06-20 中国科学院电工研究所 Electrical system for pure electric vehicle
CN202593301U (en) * 2012-04-05 2012-12-12 郑州宇通客车股份有限公司 Universal high-voltage safety control device for electric vehicle
CN102642480A (en) * 2012-05-02 2012-08-22 苏州市奥杰汽车技术有限公司 Vehicle control system of pure electric vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105874680A (en) * 2014-01-08 2016-08-17 罗伯特·博世有限公司 Battery management system for monitoring and regulating the operation of battery and battery system having such battery management system
CN105068014A (en) * 2015-08-28 2015-11-18 江苏大学 Parallel single cell performance monitoring system and monitoring method
CN107390571A (en) * 2017-06-19 2017-11-24 江苏大学 A kind of batteries of electric automobile packet system and its measure voltage & current method

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Inventor after: Li Haoming

Inventor after: Jia Haijiang

Inventor before: Li Haoming

Inventor before: Jia Haijiang

Inventor before: He Bin

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Application publication date: 20131225

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