CN103490390A - Battery management system and method with double protective functions - Google Patents
Battery management system and method with double protective functions Download PDFInfo
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- CN103490390A CN103490390A CN201310447158.9A CN201310447158A CN103490390A CN 103490390 A CN103490390 A CN 103490390A CN 201310447158 A CN201310447158 A CN 201310447158A CN 103490390 A CN103490390 A CN 103490390A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000009993 protective function Effects 0.000 title abstract 4
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 230000005669 field effect Effects 0.000 claims description 46
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 abstract description 9
- 230000008569 process Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
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- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a battery management system and method with double protective functions. The battery management system with the double protective functions comprises a master control protective module, a slave control protective module and a switch circuit, wherein the switch circuit is connected with a battery discharging circuit in series, and the master control protective module and the slave control protective module are respectively connected with the switch circuit and can independently control on-off of the switch circuit. According to the technical scheme, a software protective circuit and a hardware protective circuit are connected through a simple circuit to achieve the double protective functions for a battery, the problem that an existing battery management system protective board is poor in protection capacity is well solved, the safety coefficient of the power battery is largely improved, and broad application prospects are achieved.
Description
Technical field
The invention belongs to the battery management technical field, relate in particular to a kind of battery management system and method with double protection functions.
Background technology
Battery management system (BATTERY MANAGEMENT SYSTEM, abbreviation BMS) is the tie between battery and user, and battery management system is mainly used in secondary cell.
In normal use procedure, lithium battery interior carries out the chemical positive reaction that electric energy and chemical energy transform mutually, but under certain conditions, as it is overcharged, overdischarge and overcurrent will cause inside battery generation chemical side reactions, after this side reaction aggravation, can have a strong impact on performance and the useful life of battery, and may produce a large amount of gas, make cell internal pressure increase after-explosion rapidly and cause safety problem, therefore all lithium batteries circuit that all needs protection, for filling battery, discharge condition is effectively monitored, and turn-off and fill under certain conditions, discharge loop damages battery preventing.
And existing BMS baffle, or be by hardware circuit as AFE(Analog Front End, AFE (analog front end)) module occurs when abnormal it is protected in the battery use procedure, or is to adopt software mode to be guarded battery.But no matter be hardware mode or software mode protection, all too single, once go wrong, whole protection system will be paralysed, and makes battery lose the self-insurance ability, in the life-span of infringement battery, even to people's life, causes potential safety hazard.
Therefore, need a kind of technical scheme, to address the above problem.
Summary of the invention
The object of the present invention is to provide a kind of battery management system and method with double protection functions, be intended to solve the low problem of battery management system robustness in prior art.
The present invention is achieved in that a kind of battery management system with double protection functions, comprises the master control protection module, from control protection module, switching circuit; Described switching circuit is serially connected in battery discharging circuit, described master control protection module, from the control protection module, with switching circuit, is connected respectively, but described master control protection module, from the break-make of the equal independent control switch circuit of control protection module.
Preferably, described master control protection module is the MCU protection module.
Preferably, described is the AFE protection module from the control protection module.
Preferably, described switching circuit comprises the first field effect transistor, the second field effect transistor, the 3rd field effect transistor, the source electrode of described the first field effect transistor, the source electrode of the second field effect transistor, the source electrode of the 3rd field effect transistor all is connected to the battery pack negative pole of battery discharging circuit, the negative pole of output end that the drain electrode of described the 3rd field effect transistor is battery discharging circuit, described AFE protection module connects the grid of the second field effect transistor, described MCU protection module comprises control end, the constant voltage output, the control end of described MCU protection module connects the first fet gate, the constant voltage output of described MCU protection module is connected respectively to the first field effect transistor drain electrode, the second field effect transistor drain electrode, the grid of the 3rd field effect transistor.
The present invention also proposes a kind of double protection method of battery management system, comprising:
Set the security parameter of battery management system protection battery, the real-time parameter of master control protection module monitoring battery, and analyze the operating state of obtaining from the control protection module;
Based on described real-time parameter and described from the control protection module operating state, described master control protection module and described from the control protection module battery is protected accordingly.
Preferably, described master control protection module is the MCU protection module.
Preferably, described is the AFE protection module from the control protection module.
Preferably, described security parameter at least comprises: the safe voltage of battery, electric current, temperature.
Preferably, described based on described real-time parameter and the described operating state from the control protection module, described master control protection module and described step of battery being carried out to corresponding protection from the control protection module comprise:
When the part defencive function of analyzing described AFE protection module lost efficacy and described real-time parameter while exceeding the security parameter scope of setting, described MCU protection module and described AFE protection module cooperatively interact, and jointly for battery, provide defencive function.
Preferably, described based on described real-time parameter and the described operating state from the control protection module, described master control protection module and described step of battery being carried out to corresponding protection from the control protection module also comprise:
When analyzing the defencive function complete failure of described AFE protection module, described MCU protection module starting protection function, and provide defencive function for battery separately by described MCU protection module.
The present invention overcomes the deficiencies in the prior art; a kind of battery management system and method for double protection functions are provided; software protection circuit and hardware protection circuit have been connected to realize the double protection functions to battery by simple circuit; solved well the problem of existing BMS baffle protective capability weakness; improve greatly the coefficient of safety of electrokinetic cell, there is more wide application prospect.
The accompanying drawing explanation
Fig. 1 is the circuit diagram of a preferred embodiment of the battery management system of double protection functions of the present invention;
Fig. 2 is the schematic flow sheet of a preferred embodiment of the double protection method of battery management system of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the present invention has a preferred embodiment of the battery management system of double protection functions, comprises the master control protection module, from control protection module, switching circuit; Described switching circuit is serially connected in battery discharging circuit, described master control protection module, from the control protection module, with switching circuit, is connected respectively, but described master control protection module, from the break-make of the equal independent control switch circuit of control protection module.Described master control protection module is MCU protection module 1, and described is AFE protection module 2 from the control protection module.
Described battery discharging circuit comprises output OUT+, the OUT-of battery pack 6, battery discharging circuit; the battery management system of the application's double protection functions is serially connected between the output of battery pack 6 and battery discharging circuit; preferably, be serially connected between the negative pole of output end OUT-of the negative pole of battery pack 6 and battery discharging circuit.
Described AFE protection module 2 is analog front-end chip, is the module of a sampling cell voltage, current information, and the protection galvanic action is arranged again simultaneously.
Described MCU protection module 1, can adopt the MCU protection module in existing battery management system.
Described switching circuit comprises the first field effect transistor 3, the second field effect transistor 4, the 3rd field effect transistor 5, the source electrode of described the first field effect transistor 3, the source electrode of the second field effect transistor 4, the source electrode of the 3rd field effect transistor 5 all is connected to battery pack 6 negative poles of battery discharging circuit, the negative pole of output end OUT-that the drain electrode of described the 3rd field effect transistor 5 is battery discharging circuit, described AFE protection module 2 connects the grid of the second field effect transistor 4, described MCU protection module 1 comprises control end 11, constant voltage output 12, the control end 11 of described MCU protection module 1 connects the grid of the first field effect transistor 3, the constant voltage output 12 of described MCU protection module 1 is connected respectively to the drain electrode of the first field effect transistor 3, the drain electrode of the second field effect transistor 4, the grid of the 3rd field effect transistor 5.
The present embodiment course of work: the constant voltage output 12 of MCU protection module 1 is exported high level always; When control end 11 output low levels, AFE protection module 2 output low levels of MCU protection module 1, the 3rd field effect transistor 5 conductings, the first field effect transistor 3, the second field effect transistor 4 cut-offs, battery discharging circuit regular picture; When battery discharging circuit occurs when abnormal, the control end 11 output high level of MCU protection module 1, the first field effect transistor 3 conductings, the 3rd field effect transistor 5 grid input low levels, the 3rd field effect transistor 5 cut-offs, battery discharging circuit stops external electric discharge; When battery discharging circuit occurs abnormal; and MCU protection module 1 is not normal operation also; AFE protection module 2 is to the grid output high level of the second field effect transistor 4; the second field effect transistor 4 conductings; the 3rd field effect transistor 5 grid input low levels, the 3rd field effect transistor 5 cut-offs, battery discharging circuit stops external electric discharge.Protection process while only take battery discharge in the present embodiment describes as example; operation principle when the protection process in battery when charging can be with reference to above-mentioned battery discharge; still for the switching characteristic of utilizing field effect transistor, call AFE protection module 2 and 1 pair of battery of MCU protection module carries out duplicate protection, do not repeat them here.
Battery management system in the present embodiment; utilize the switching characteristic of field effect transistor; AFE protection module 2 and MCU protection module 1 are integrated in a battery management system; under extreme environment; even any one cisco unity malfunction that goes wrong in AFE protection module 2 and MCU protection module 1; also can improve the protective capability of system by another protection module of gating, thereby form a duplicate protection system, increase the reliability of product.And MCU protection module 1 and AFE protection module 2; a software protection module and a hardware protection module are combined with; make protection system there is better adaptability to different environments for use, relatively under rugged environment, still bringing into play its defencive function, more reliable and stable.
As shown in Figure 2, preferred embodiment of the present invention proposes a kind of double protection method of battery management system, comprising:
Step S101, set the security parameter that battery management system is protected battery, the real-time parameter of master control protection module monitoring battery, and analyze the operating state of obtaining from the control protection module;
According to the specification of battery management system, set the security parameter of its protection battery, this security parameter at least comprises: the safe voltage of battery, electric current, temperature.In the time of in the security parameter scope that voltage, electric current, the temperature of battery are being set, illustrate that now battery is at safe condition.Described master control protection module is also that the MCU protection module is monitored the real-time parameter of battery; the parameters such as the real-time voltage to battery in the charge and discharge process, electric current, temperature are detected; and obtain the real-time parameter of battery in the charge and discharge process, to grasp fully the state of battery in the charge and discharge process.
The MCU protection module by real-time detection analyze obtain described from the control protection module be also the operating state of AFE protection module; according to the operating state of AFE protection module, judge whether to cause battery in the hole because of its operational failure; in order to carry out immediately follow-up protection operation, reduce to damage the risk of battery.
Step S102, based on described real-time parameter and described from the control protection module operating state, described master control protection module and described from the control protection module battery is protected accordingly.
When analysis knows that the described part defencive function that is the AFE protection module from the control protection module lost efficacy and described real-time parameter while exceeding the security parameter scope of setting; illustrate that current battery is in the hole; impaired risk is arranged; described master control protection module is MCU protection module actuating section defencive function; the operating state that the MCU protection module is current according to the AFE protection module; cooperatively interact with the AFE protection module, jointly for battery provides defencive function, guarantee that battery recovers normal as early as possible.
When analysis is known described from the control protection module while being the defencive function complete failure of AFE protection module; illustrate that now the AFE protection module may damage; can't provide protection for battery; current battery is in the unprotect state; the MCU protection module directly starts its defencive function; and by the MCU protection module separately for battery provides defencive function, guaranteed that battery, in real time in shielded state, has reduced the impaired risk of battery further.
The present embodiment passes through such scheme, utilize the MCU protection module to carry out Real-Time Monitoring to the operating state of battery status and AFE protection module, and occur when abnormal the work of AFE protection module being detected, the MCU protection module provides defencive function for battery, like this, even when under rugged environment, in MCU protection module and AFE protection module, any one breaks down cisco unity malfunction, also can enable another module is protected battery, can carry out duplicate protection to battery, fail safe and the reliability of battery management system have greatly been improved, also strengthened the adaptability of battery management system to different environments for use.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the battery management system with double protection functions is characterized in that: comprise the master control protection module, from control protection module, switching circuit; Described switching circuit is serially connected in battery discharging circuit, described master control protection module, from the control protection module, is connected respectively described master control protection module, from controlling the break-make of the equal independent control switch circuit of protection module with switching circuit.
2. the battery management system with double protection functions according to claim 1, it is characterized in that: described master control protection module is the MCU protection module.
3. the battery management system with double protection functions according to claim 2 is characterized in that: described is the AFE protection module from the control protection module.
4. the battery management system with double protection functions according to claim 3, it is characterized in that: described switching circuit comprises the first field effect transistor, the second field effect transistor, the 3rd field effect transistor, the source electrode of described the first field effect transistor, the source electrode of the second field effect transistor, the source electrode of the 3rd field effect transistor all is connected to the battery pack negative pole of battery discharging circuit, the negative pole of output end that the drain electrode of described the 3rd field effect transistor is battery discharging circuit, described AFE protection module connects the grid of the second field effect transistor, described MCU protection module comprises control end, the constant voltage output, the control end of described MCU protection module connects the first fet gate, the constant voltage output of described MCU protection module is connected respectively to the first field effect transistor drain electrode, the second field effect transistor drain electrode, the grid of the 3rd field effect transistor.
5. the double protection method of a battery management system, is characterized in that, comprising:
Set the security parameter of battery management system protection battery, the real-time parameter of master control protection module monitoring battery, and analyze the operating state of obtaining from the control protection module;
Based on described real-time parameter and described from the control protection module operating state, described master control protection module and described from the control protection module battery is protected accordingly.
6. method according to claim 5, it is characterized in that: described master control protection module is the MCU protection module.
7. method according to claim 5 is characterized in that: described is the AFE protection module from the control protection module.
8. according to the described method of claim 6 or 7, it is characterized in that, described security parameter at least comprises: the safe voltage of battery, electric current, temperature.
9. method according to claim 8, is characterized in that, described based on described real-time parameter and the described operating state from the control protection module, and described master control protection module and described step of battery being carried out to corresponding protection from the control protection module comprise:
When the part defencive function of analyzing described AFE protection module lost efficacy and described real-time parameter while exceeding the security parameter scope of setting, described MCU protection module and described AFE protection module cooperatively interact, and jointly for battery, provide defencive function.
10. method according to claim 8, is characterized in that, described based on described real-time parameter and the described operating state from the control protection module, and described master control protection module and described step of battery being carried out to corresponding protection from the control protection module also comprise:
When analyzing the defencive function complete failure of described AFE protection module, described MCU protection module starting protection function, and provide defencive function for battery separately by described MCU protection module.
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| CN201310447158.9A CN103490390B (en) | 2013-09-26 | 2013-09-26 | There is battery management system and the method for double protection functions |
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| CN201310447158.9A CN103490390B (en) | 2013-09-26 | 2013-09-26 | There is battery management system and the method for double protection functions |
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| CN103490390B CN103490390B (en) | 2016-04-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529676A (en) * | 2014-10-20 | 2016-04-27 | 英飞凌科技股份有限公司 | Electronic fuse |
| CN106684482A (en) * | 2016-12-29 | 2017-05-17 | 深圳市沃特玛电池有限公司 | Battery overcharge protection system |
| CN106786928A (en) * | 2016-12-29 | 2017-05-31 | 惠州市蓝微新源技术有限公司 | A kind of BMS charge and discharge controls protection circuit |
| CN107650686A (en) * | 2017-11-13 | 2018-02-02 | 深圳市睿德电子实业有限公司 | The dual-protection circuit of balance car battery and its guard method |
| US10132868B2 (en) | 2016-12-20 | 2018-11-20 | Industrial Technology Research Institute | Battery management system and method thereof |
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| EP1533882B1 (en) * | 2003-11-14 | 2008-10-29 | Sony Corporation | Battery pack with integrated battery protection circuit |
| CN102621494A (en) * | 2011-01-25 | 2012-08-01 | 三洋电机株式会社 | Overvoltage detection device, protective device and battery pack |
| CN103208784A (en) * | 2012-01-17 | 2013-07-17 | 东莞赛微微电子股份有限公司 | Battery protection circuit and method thereof |
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2013
- 2013-09-26 CN CN201310447158.9A patent/CN103490390B/en active Active
Patent Citations (3)
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| EP1533882B1 (en) * | 2003-11-14 | 2008-10-29 | Sony Corporation | Battery pack with integrated battery protection circuit |
| CN102621494A (en) * | 2011-01-25 | 2012-08-01 | 三洋电机株式会社 | Overvoltage detection device, protective device and battery pack |
| CN103208784A (en) * | 2012-01-17 | 2013-07-17 | 东莞赛微微电子股份有限公司 | Battery protection circuit and method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529676A (en) * | 2014-10-20 | 2016-04-27 | 英飞凌科技股份有限公司 | Electronic fuse |
| US9979180B2 (en) | 2014-10-20 | 2018-05-22 | Infineon Technologies Ag | Electronic fuse |
| US10132868B2 (en) | 2016-12-20 | 2018-11-20 | Industrial Technology Research Institute | Battery management system and method thereof |
| CN106684482A (en) * | 2016-12-29 | 2017-05-17 | 深圳市沃特玛电池有限公司 | Battery overcharge protection system |
| CN106786928A (en) * | 2016-12-29 | 2017-05-31 | 惠州市蓝微新源技术有限公司 | A kind of BMS charge and discharge controls protection circuit |
| CN106786928B (en) * | 2016-12-29 | 2023-10-20 | 惠州市蓝微新源技术有限公司 | BMS charge-discharge control protection circuit |
| CN107650686A (en) * | 2017-11-13 | 2018-02-02 | 深圳市睿德电子实业有限公司 | The dual-protection circuit of balance car battery and its guard method |
| CN107650686B (en) * | 2017-11-13 | 2023-10-27 | 深圳市睿德电子实业有限公司 | Dual protection circuit of balance car battery and protection method thereof |
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| CN103490390B (en) | 2016-04-13 |
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Address after: Room 758, 7th Floor, Block A and B, Xinghua Building, No. 2018 Shennan Middle Road, Fuqiang Community, Huaqiang North Street, Futian District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Peicheng Electronic Technology Co.,Ltd. Address before: 518000, 3rd floor, Building B, Tsinghua Ziguang Information Port, North District, Science and Technology Park, Nanshan District, Shenzhen, Guangdong Province Patentee before: SHENZHEN PACE ELECTRONIC TECHNOLOGY CO.,LTD. |