CN201117742Y - Lithium ion dynamic batteries administrative system - Google Patents

Lithium ion dynamic batteries administrative system Download PDF

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Publication number
CN201117742Y
CN201117742Y CNU2007201136112U CN200720113611U CN201117742Y CN 201117742 Y CN201117742 Y CN 201117742Y CN U2007201136112 U CNU2007201136112 U CN U2007201136112U CN 200720113611 U CN200720113611 U CN 200720113611U CN 201117742 Y CN201117742 Y CN 201117742Y
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CN
China
Prior art keywords
voltage monitoring
circuit
links
cell voltage
monitoring chip
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Expired - Fee Related
Application number
CNU2007201136112U
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Chinese (zh)
Inventor
李建林
宋文涛
胡矩锋
雷荣
蒋云飞
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.)
Wanxiang Group Corp
Wanxiang Electric Vehicle Co Ltd
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Wanxiang Group Corp
Wanxiang Electric Vehicle Co Ltd
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Priority to CNU2007201136112U priority Critical patent/CN201117742Y/en
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Publication of CN201117742Y publication Critical patent/CN201117742Y/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model relates to a lithium ion power battery management system which includes a plurality of equalization circuits, a plurality of multiple-circuit battery voltage monitoring chips and an SCM unit connected with all the multiple-circuit battery voltage monitoring chips through a bus; a plurality of batteries form a series circuit; each battery is connected with one equalization circuit in parallel; a plurality of equalization circuits are connected on the voltage monitoring pins of each multiple-circuit battery voltage monitoring chip; the series circuit is connected with a current detecting resistance and a protection circuit in series. The two ends of the current detecting resistance are connected with the current detecting pin of one multiple-circuit battery voltage monitoring chip; the control end of the protection circuit is connected with the SCM unit or connected with the power tube drive pin of one multiple-circuit battery voltage monitoring chip. The utility model has simple circuits, is convenient to be maintained, has the protection functions of overvoltage, over-discharge, over-current and over-heating as well as improves the service and safe performance of the lithium ion power battery group.

Description

The lithium-ion power battery group management system
Technical field
The utility model belongs to the battery management technical field, relates in particular to a kind of lithium-ion power battery group management system with equalizing voltage, charge and discharge protecting function.
Background technology
Electric automobile will bring huge variation to human society in 21 century as the green traffic instrument.The development electric automobile must solve several main key technologies, and batteries management system is exactly wherein one.Traditional battery management system circuit and line complexity, maintenance difficult, reliability are also low.On the other hand, at present the technology of lithium-ion-power cell is not ripe especially, and through after the charge and discharge cycles repeatedly, each cell otherness increases, and can directly influence the useful life and the safety of battery.
Summary of the invention
The utility model is in order to overcome above-mentioned technical problem; a kind of simplification circuit and line are provided; be convenient to maintenance; improve reliability; and the monomer lithium-ion-power cell is had the balance protection function, improve the useful life of lithium-ion-power cell group and the lithium-ion power battery group management system of security performance.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: the utility model comprises several equalizing circuits, several multichannel cell voltage monitoring chips and the single machine unit that links to each other by bus with all multichannel cell voltage monitoring chip; Multiple batteries is formed series circuit, forms battery pack anode, battery pack negative terminal, and equalizing circuit in parallel is connected with a plurality of equalizing circuits on the voltage monitoring pin of each multichannel cell voltage monitoring chip on every batteries; Be in series with current sense resistor, protective circuit on the described series circuit; the two ends of current sense resistor link to each other with the current detecting pin of one of them multichannel cell voltage monitoring chip, and the control end of protective circuit links to each other with described single machine unit or drives pin with the power tube of one of them multichannel cell voltage monitoring chip and links to each other.Can finish the work that is provided with of equalizing voltage, overcharged voltage, overdischarge pressure, overheat protector, overcurrent protection by multichannel cell voltage monitoring chip is linked to each other with computer in advance.In the batteries charging process, the voltage monitoring pin of cell voltage monitoring chip detects the voltage of single-unit lithium-ion-power cell, in case find that voltage difference surpasses the equalizing voltage that is provided with between any two batteries, the equalizing circuit that then is connected in parallel on the two ends of the high battery of voltage is started working, reduce cell voltage, make the consistency of each batteries better.By current sense resistor, multichannel cell voltage monitoring chip obtains the electric current in the series circuit, in case electric current surpasses the overcurrent protection value that is provided with, then starts protective circuit and cuts off series circuit, stops to discharge and recharge, and realizes defencive function.Multichannel cell voltage monitoring chip carries out data communication by bus form and single machine unit, and circuit is simple, and is easy to maintenance, improve reliability, and the quantity of multichannel cell voltage monitoring chip is unrestricted, and autgmentability is better.The major function of single machine unit is a management multichannel cell voltage monitoring chip, it caught the data of coming carries out analyzing and processing, and by the standard industry bus, with the data output of whole Battery pack group.
As preferably, described protective circuit is a contactor, and the control end of contactor links to each other with the control output end of described single machine unit.Various data such as the voltage that multichannel cell voltage monitoring chip obtains, electric current flow to single machine unit by bus; internal processes by single machine unit is handled, is analyzed; in case find that overvoltage, mistake are put, overcurrent; send control signal immediately through the control output end and give contactor; make contactor be in off-state; disconnect series circuit, stop, realizing defencive function battery charging and discharging.
As preferably, described protective circuit is the series circuit of discharge prevention metal-oxide-semiconductor Tf and charge protection metal-oxide-semiconductor Tc; The grid of Tf, Tc drives pin with the power tube of multichannel cell voltage monitoring chip and links to each other, and the source electrode of Tf both linked to each other with the battery pack negative terminal, links to each other with the drain electrode of Tc again, and the source electrode of Tc is drawn and formed the charging negative terminal.Multichannel cell voltage monitoring chip obtains voltage, current data through voltage monitoring pin, current detecting pin; and with the value of setting of the overcharged voltage of prior setting, overdischarge pressure, overcurrent protection relatively; in case surpass these values of setting; the power tube of multichannel cell voltage monitoring chip drives pin output control signal; drive discharge prevention metal-oxide-semiconductor Tf or charge protection metal-oxide-semiconductor Tc; stop discharge or charging, realize defencive function.
As preferably, described equalizing circuit comprises resistance R, metal-oxide-semiconductor T; One end of resistance R links to each other with anode, and the other end of R links to each other with the drain electrode of metal-oxide-semiconductor T, and the source electrode of metal-oxide-semiconductor T links to each other with battery cathode, and the grid of metal-oxide-semiconductor T, anode, battery cathode link to each other with the voltage monitoring pin of multichannel cell voltage monitoring chip.The voltage monitoring pin of multichannel cell voltage monitoring chip detects the voltage of single battery, in charging process, if find that voltage difference surpasses the equalizing voltage that is provided with between any two batteries, then export high level and give the grid of the metal-oxide-semiconductor T corresponding with the high battery of voltage, make the T conducting, battery discharges to resistance R, cell voltage reduces, realize the equilibrium between each battery, guarantee that the consistency of each battery is better, improve the useful life and the security performance of lithium-ion-power cell group.
As preferably, be connected with temperature sensor on the temperature survey pin of described multichannel cell voltage monitoring chip, described temperature sensor is located near the battery.The temperature sensor measurement battery pack temperature; and give multichannel cell voltage monitoring chip with temperature data; in case the temperature value that records surpasses the temperature protection value that is provided with in advance; then make it to disconnect to protective circuit, realize the overheat protector function by multichannel cell voltage monitoring chip or single machine unit output control signal.
As preferably, be connected with display circuit on the described single machine unit.Demonstrate the various data such as voltage, electric current, temperature of battery pack by display circuit, use more convenient.
As preferably, the communication interface of described single machine unit links to each other with external equipment.External equipment can be vehicle-mounted equipment such as onboard system, panel board, and data such as the voltage of battery pack, electric current, temperature also can show on mobile unit, and the driver is come into plain view to the operating state of battery pack.
The beneficial effects of the utility model are: by bus a plurality of multichannel cell voltage monitoring chips are linked to each other with single machine unit, simplified circuit and line greatly, easy to maintenance, reliability improves.By being connected in parallel on the equalizing circuit on the single battery, the consistency of each batteries voltage when having guaranteed charging, the useful life and the security performance of raising lithium-ion-power cell group.Contactor or the protective circuit of forming by discharge prevention metal-oxide-semiconductor, charge protection metal-oxide-semiconductor; guarantee in the battery pack overvoltage, cross and to put, to cut off during abnormal working position such as overcurrent, excess temperature the series circuit that battery pack is formed; stop to discharge and recharge; realize defencive function, guarantee the safe handling of lithium-ion-power cell group.
Description of drawings
Fig. 1 is that a kind of circuit of the present utility model connects block diagram.
Fig. 2 is a kind of circuit connection diagram of equalizing circuit in the utility model.
Fig. 3 is that another circuit of the present utility model connects block diagram.
1. equalizing circuits among the figure, 2. multichannel cell voltage monitoring chip, 3. bus, 4. single machine unit, 5. battery pack anode, 6. battery pack negative terminal, 7. current sense resistor, 8. contactor, 9. charging negative terminal, 10. temperature sensor, 11. display circuits, 12. external equipments.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: the lithium-ion power battery group management system of present embodiment, as shown in Figure 1 and Figure 2, comprise n * 13 equalizing circuit 1, a n multichannel cell voltage monitoring chip 2 and the single machine unit 4 that links to each other by bus 3 with n multichannel cell voltage monitoring chip 2.N * 13 battery pack becomes series circuit, forms battery pack anode 5, battery pack negative terminal 6, equalizing circuit 1 in parallel on every batteries.Equalizing circuit 1 comprises resistance R, metal-oxide-semiconductor T, one end of resistance R links to each other with anode, the other end of R links to each other with the drain electrode of metal-oxide-semiconductor T, the source electrode of metal-oxide-semiconductor T links to each other with battery cathode, and the grid of metal-oxide-semiconductor T, anode, battery cathode link to each other with the voltage monitoring pin of multichannel cell voltage monitoring chip 2.Be connected with 13 equalizing circuits 1 on the voltage monitoring pin of each multichannel cell voltage monitoring chip 2, a multichannel cell voltage monitoring chip 2 can be monitored 13 batteries at most, 13 batteries are formed a battery group, each battery group is attached with temperature sensor 10, and temperature sensor 10 connects the temperature survey pin of multichannel cell voltage monitoring chip 2.Be in series with current sense resistor 7, contactor 8 on the series circuit, the two ends of current sense resistor 7 link to each other with the current detecting pin of n multichannel cell voltage monitoring chip 2, and the control end of contactor 8 links to each other with the control output end of single machine unit 4.Be connected with display circuit 11 on the single machine unit 4, the communication interface of single machine unit 4 links to each other with external equipments 12 such as the onboard system of electric automobile, panel boards.
The utility model linked to each other multichannel cell voltage monitoring chip earlier before being installed on the electric automobile with computer, finish equalizing voltage, overcharged voltage, overdischarge pressure, excess temperature, overcurrent is isoparametric that work is set, and then installed on the electric automobile.In the batteries charging process, realize the mop-up equalization of battery pack, voltage difference surpasses 30mV between any two batteries when multichannel cell voltage monitoring chip detects, then export control signal and give the grid of the metal-oxide-semiconductor T corresponding with high-voltage battery, make this metal-oxide-semiconductor conducting, cell voltage is to the conductive discharge that is attached thereto, thereby the reduction cell voltage keeps the consistency between each batteries.
The major function of single machine unit is n multichannel cell voltage monitoring chip of management, carry out analyzing and processing to catch the data of coming by n multichannel cell voltage monitoring chip, and by the standard industry bus, data such as the voltage of whole Battery pack group, electric current, temperature are defeated by external equipments such as onboard system, panel board.
Usually our overcharged voltage of setting is 4.25V, and overdischarge is pressed and is 2.80V, when a batteries voltage surpasses the overcharged voltage that sets in advance or be lower than the overdischarge pressure, the control output end output control signal of single machine unit is given contactor, make it to disconnect, cut off series circuit, stop to discharge and recharge.
In charging process and discharge process, detect electric current and temperature simultaneously in real time, if electric current and temperature surpass set point; then the control output end of single machine unit is also exported control signal and is given contactor, makes it to disconnect, and cuts off series circuit; stop to discharge and recharge, realize defencive function.
The utlity model has following function:
1. the total voltage of every cell voltage, battery group total voltage and whole battery group in the monitoring battery group simultaneously.
2. can monitoring battery the charging and discharging currents of group, and have overcurrent and short-circuit protection function.
3. can discern automatically and the monitoring battery set charge/discharge process in every joint monomer battery voltage, can multiple spot detect the whole battery group internal temperature, and have overcharge, cross put, functions such as overcurrent, short circuit, overheat protector.
4. can open equalizing circuit automatically when charging, reduce the too high cell voltage of monomer voltage, every batteries voltage in the balancing battery group makes it to be consistent to greatest extent.
5. can match as standard industry bus interface such as RS232, RS485, CAN.
6. need the number of batteries of management unrestricted, extendiblely be any group: promptly to tens, hundreds of even more battery pack manage.
Embodiment 2: the lithium-ion power battery group management system of present embodiment as shown in Figure 3, is in series with discharge prevention metal-oxide-semiconductor Tf and charge protection metal-oxide-semiconductor Tc on the series circuit that a plurality of batteries are formed; The grid of Tf, Tc drives pin with the power tube of n multichannel cell voltage monitoring chip 2 and links to each other, and the source electrode of Tf both linked to each other with battery pack negative terminal 6, links to each other with the drain electrode of Tc again, and the source electrode of Tc is drawn and formed charging negative terminal 9.Usually our overcharged voltage of setting is 4.25V, and overdischarge is pressed and is 2.80V.In the batteries charging process, if wherein there is a batteries voltage to surpass 4.25V, then the power tube of multichannel cell voltage monitoring chip 2 drives pin output control signal and makes charge protection metal-oxide-semiconductor Tc disconnection, stops charging.In the battery power discharge process, if wherein there is a batteries voltage to be lower than 2.80V, then the power tube of multichannel cell voltage monitoring chip 2 drives pin output control signal and makes discharge prevention metal-oxide-semiconductor Tf disconnection, stops discharge.Realize overcharging, crossing and put defencive function of battery, improve the useful life and the security performance of lithium-ion-power cell group.Remaining is with embodiment 1.

Claims (7)

1. lithium-ion power battery group management system is characterized in that comprising several equalizing circuits (1), several multichannel cell voltage monitoring chips (2) and the single machine unit (4) that links to each other by bus (3) with all multichannel cell voltage monitoring chip (2); Multiple batteries is formed series circuit, forms battery pack anode (5), battery pack negative terminal (6), and an equalizing circuit (1) in parallel is connected with a plurality of equalizing circuits (1) on every batteries on the voltage monitoring pin of each multichannel cell voltage monitoring chip (2); Be in series with current sense resistor (7), protective circuit on the described series circuit; the two ends of current sense resistor (7) link to each other with the current detecting pin of one of them multichannel cell voltage monitoring chip (2), and the control end of protective circuit links to each other with described single machine unit (4) or drives pin with the power tube of one of them multichannel cell voltage monitoring chip (2) and links to each other.
2. lithium-ion power battery group management according to claim 1 system is characterized in that described protective circuit is contactor (8), and the control end of contactor (8) links to each other with the control output end of described single machine unit (4).
3. lithium-ion power battery group management according to claim 1 system is characterized in that described protective circuit is the series circuit of discharge prevention metal-oxide-semiconductor Tf and charge protection metal-oxide-semiconductor Tc; The grid of Tf, Tc drives pin with the power tube of multichannel cell voltage monitoring chip (2) and links to each other, and the source electrode of Tf both linked to each other with battery pack negative terminal (6), links to each other with the drain electrode of Tc again, and the source electrode of Tc is drawn and formed charging negative terminal (9).
4. according to claim 1 or 2 or 3 described lithium-ion power battery group management systems, it is characterized in that described equalizing circuit (1) comprises resistance R, metal-oxide-semiconductor T; One end of resistance R links to each other with anode, and the other end of R links to each other with the drain electrode of metal-oxide-semiconductor T, and the source electrode of metal-oxide-semiconductor T links to each other with battery cathode, and the grid of metal-oxide-semiconductor T, anode, battery cathode link to each other with the voltage monitoring pin of multichannel cell voltage monitoring chip (2).
5. according to claim 1 or 2 or 3 described lithium-ion power battery group management systems, it is characterized in that being connected with temperature sensor (10) on the temperature survey pin of described multichannel cell voltage monitoring chip (2), described temperature sensor (10) is located near the battery.
6. according to claim 1 or 2 or 3 described lithium-ion power battery group management systems, it is characterized in that being connected with on the described single machine unit (4) display circuit (11).
7. according to claim 1 or 2 or 3 described lithium-ion power battery group management systems, it is characterized in that the communication interface of described single machine unit (4) links to each other with external equipment (12).
CNU2007201136112U 2007-08-22 2007-08-22 Lithium ion dynamic batteries administrative system Expired - Fee Related CN201117742Y (en)

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CN101976876A (en) * 2010-11-18 2011-02-16 无锡东海新能源科技有限公司 Device and method for equalizing batteries in charging process
CN102097838A (en) * 2010-12-24 2011-06-15 余维 Elementary unit for intelligent battery management system
CN102097844A (en) * 2011-01-17 2011-06-15 余维 Intelligent battery management system
CN102122834A (en) * 2011-04-08 2011-07-13 武汉理工大学 Power battery management chip supporting multi-series connection
CN102130360A (en) * 2011-01-28 2011-07-20 华为技术有限公司 Lithium battery module
CN102136748A (en) * 2011-02-17 2011-07-27 厦门市国维电子科技有限公司 Electric quantity transfer circuit
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CN102623760A (en) * 2011-01-26 2012-08-01 上海樟村电子有限公司 Battery management system
CN102844959A (en) * 2010-04-16 2012-12-26 株式会社Lg化学 Battery management system and method for transferring data within battery management system
CN103257699A (en) * 2013-05-17 2013-08-21 天宇通讯科技(昆山)有限公司 Notebook computer battery intelligent control circuit
CN104979883A (en) * 2015-08-07 2015-10-14 杭州业旭电器科技有限公司 Storage battery voltage balance management system
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CN105375582A (en) * 2015-12-09 2016-03-02 合肥国盛电池科技有限公司 Load self-inspection based lithium battery pack control system
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CN102270885A (en) * 2010-06-04 2011-12-07 Abb公司 Method and arrangement for balancing voltages of series connection of storage units for electrical energy
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CN102130360A (en) * 2011-01-28 2011-07-20 华为技术有限公司 Lithium battery module
CN102136748A (en) * 2011-02-17 2011-07-27 厦门市国维电子科技有限公司 Electric quantity transfer circuit
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CN102122834A (en) * 2011-04-08 2011-07-13 武汉理工大学 Power battery management chip supporting multi-series connection
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CN105895843A (en) * 2016-06-23 2016-08-24 广州益维电动汽车有限公司 Intelligent lithium ion battery module
CN105958137A (en) * 2016-06-23 2016-09-21 广州益维电动汽车有限公司 Heat balance management system for lithium-ion battery module
CN105978094A (en) * 2016-06-23 2016-09-28 广州益维电动汽车有限公司 Equalizing charge control system for lithium ion battery module
CN106026262A (en) * 2016-06-23 2016-10-12 广州益维电动汽车有限公司 Lithium ion battery module safety protection system
CN105958137B (en) * 2016-06-23 2019-05-14 广州益维电动汽车有限公司 A kind of lithium ion battery mould group thermal balance management system
CN106300280A (en) * 2016-10-19 2017-01-04 上海空间电源研究所 A kind of lithium electricity collecting unit isolating and protecting device
CN107482728A (en) * 2017-09-04 2017-12-15 东莞钜威动力技术有限公司 The battery signal Acquisition Circuit and cell managing device of power-consumption balance
CN107589382A (en) * 2017-10-25 2018-01-16 宁夏黑金昊源绿能科技有限公司 A kind of detection means of battery surplus and health status
CN111959280A (en) * 2020-08-31 2020-11-20 中车大连机车车辆有限公司 Power battery safety protection system and safety protection method
CN112582700A (en) * 2020-11-18 2021-03-30 超威电源集团有限公司 Lead-acid storage battery and manufacturing method thereof
CN112701766A (en) * 2021-03-23 2021-04-23 广东高斯宝电气技术有限公司 Single battery passive equalization circuit structure and battery pack passive equalization control method
CN112701766B (en) * 2021-03-23 2021-06-25 广东高斯宝电气技术有限公司 Single battery passive equalization circuit structure and battery pack passive equalization control method
CN117595465A (en) * 2024-01-18 2024-02-23 杭州高特电子设备股份有限公司 Active equalization circuit of battery pack and protection system thereof
CN117595465B (en) * 2024-01-18 2024-05-03 杭州高特电子设备股份有限公司 Active equalization circuit of battery pack and protection system thereof

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