CN104518530A - Lithium battery pack management system - Google Patents
Lithium battery pack management system Download PDFInfo
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- CN104518530A CN104518530A CN201310450992.3A CN201310450992A CN104518530A CN 104518530 A CN104518530 A CN 104518530A CN 201310450992 A CN201310450992 A CN 201310450992A CN 104518530 A CN104518530 A CN 104518530A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 96
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000003862 health status Effects 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 7
- 238000011161 development Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000003993 interaction Effects 0.000 abstract description 3
- 230000005856 abnormality Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000005669 field effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- H02J7/0021—
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- H02J7/0026—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H02J2007/0067—
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a lithium battery pack management system. The lithium battery pack management system comprises N sets of lithium batteries, N slave control panel cards, a main control board and a host computer. The system can monitor the voltage, the charging and discharging currents, the operating temperature and the environmental temperature of a single lithium battery in real time, equalization control can be performed on the single battery with a large state difference according to the detected voltage of the lithium battery and an equalization algorithm brought forward, and the consistency of the battery is improved. According to collected parameters, the main control board can give an SOC estimated value, provides a charging and discharging management strategy, and extends the service lifetime of the battery. The host computer displays the collected state information, control information, abnormality information and alarm information of a lithium battery pack and provides friendly man-computer interaction. Meanwhile, a similar modularization design scheme is brought forward for hardware development of the system, and the maintenance cost can be effectively reduced.
Description
Technical field
The present invention relates to the management system field of transforming plant DC back-up source, is a kind of lithium battery pack management system specifically.
Background technology
Current in transformer station of China, DC power system is a kind of independent electric power supply irrelevant with power system operation, ensures that transformer station is when alternating current complete failure, still can reliably normally work.Battery pack is the important component part of DC power system.Conventional is lead-acid battery group in the market, but it has some inherent defects, and as short in the life-span, security performance is difficult to reach requirement, discharge performance difference etc.And lithium battery group has premium properties such as volume is little, the life-span is long, energy density is high, memory-less effect, high voltage and self-discharge rate are low.
In addition, in order to play the superior function of lithium battery group to greatest extent, and ensureing battery pack long-term safety reliability service, needing a set of perfect lithium battery fabric anomaly scheme.A set of outstanding lithium battery Managed Solution usually to meet following some: one, lithium battery group state information is accurately provided.As the state-of-charge (i.e. SOC) etc. of single lithium battery voltage, battery total voltage, charging and discharging currents value, battery temperature and ambient temperature, battery.Two, ensure safe and reliable control measures accurately.As balanced management, discharge and recharge safety management etc.In addition, the prerequisite realizing management is that system can provide and reliably communicates timely.Three, false alarm information and exception handling are provided.As cell voltage exception, charging and discharging currents exception, communication abnormality etc., and undertaken showing and record by abnormal.
Current, still there is the shortcoming of following several respects in the technology of existing lithium battery management system:
One, structurally, current lithium battery pack management system mainly contains centralized and distributed two kinds.Centralized when battery cell quantity is larger, be difficult to realize, shortcoming is comparatively obvious, less use.Distributedly to have many good qualities, as having good autgmentability, can expand from Control card easily, thus the larger environment of number of batteries, division of labor work can be met, the burden of master control board can be reduced, realize monitor and managment etc. preferably.But also there is certain shortcoming: system bulky complex, realizes difficulty large; Cost is high, particularly each system that can only manage a batteries from Control card; Volume is large, is applied in actual condition environment restricted.
Two, functionally, current lithium battery pack management system can provide the information such as voltage, temperature, charging and discharging currents of battery usually, but the process of balanced management aspect is not perfect.Because lithium battery exists inconsistency, if the battery in battery pack keeps inconsistent for a long time, battery active volume can be caused to reduce on the one hand, also can reduce battery on the other hand.
Summary of the invention
High for existing lithium battery pack management system cost, realize the problems such as difficulty is large, balanced management imperfection, the invention provides a kind ofly can to monitor in real time battery pack, cost is lower and have the lithium battery pack management system of balanced management function.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of lithium battery pack management system, is applied in the DC back-up power supply of transformer station, comprises
A master control board, connects each from Control card by CAN, for obtaining the information that each sends from Control card, and sends order to from each Control card;
N number of from Control card, for connecting N group lithium battery, eachly connect one group of lithium battery from Control card, for obtaining the parameter information of this group lithium battery;
Host computer, for being obtained the state information of lithium battery group from master control board by serial ports, and is shown; Send order by serial ports to master control board simultaneously, lithium battery group is managed.
Described lithium battery of often organizing is made up of 4 ~ 6 joint cells.
Described master control board adds serial ports by core control panel card and IO expansion interface is formed, described serial ports is used for the communication of master control board and host computer, described core control panel card is used for the data of collection to send to host computer, accept the control command of host computer, and SOC estimation and charge and discharge control are carried out to lithium battery group.
Describedly comprise the current detection module of core control panel card and connection thereof, voltage detection module and balanced management module from Control card;
Described core control panel card is used for sticking into Serial Communication with master board, the data of collection is sent to master control board, accepts the control command of master control board, and provide balanced management to this Battery pack;
The charging and discharging currents of described current detection module on testing circuit main line;
Described voltage detection module is used for each joint single lithium battery voltage;
Described balanced management module is battery balanced for what manage in lithium battery group between each lithium battery monomer.
Described core control panel card comprises temperature detecting module, CAN transceiver module, indicator light, the communication module of MCU and connection thereof, and the power management module for powering for above-mentioned modules;
Described MCU gathering and processing for the information of carrying out;
Described CAN transceiver module is used for master control board and communicating from Control card;
Described temperature detecting module, for monitoring temperature and the ambient temperature of lithium battery, provides temperature parameter for analyzing the health status of lithium battery;
Described communication module is used for communicating of master control board and host computer, to realize the transmission of the state information of lithium battery, control information and abnormal information;
Described indicator light is used to indicate operating state and the abnormal information of battery.
Described balanced management module comprises switch control unit and necessary protective circuit; Described switch control unit turns on and off according to equalization algorithm, makes part lithium battery realize electric discharge, finally reaches balanced object.
Tool of the present invention has the following advantages and beneficial effect:
1. achieve the real-time monitoring to lithium battery group.The operating state that each saves lithium battery can be monitored in real time, as the voltage, charging and discharging currents, temperature etc. of lithium battery.
2. achieve the safety management to lithium battery group, increase battery life.One side lithium battery instead of traditional lead-acid battery; Provide Security Strategies and balanced management on the other hand, make battery keep good consistency, effectively can improve the life-span of battery.
3. intuitively show, provide friendly interactive interface.On the one hand, Control card there is indicator light, the operating state of battery can be demonstrated intuitively; On the other hand, upper computer software, by the state information of lithium battery management system, control and management information, exception and warning message etc., is clearly presented on upper computer software, provides a friendly interactive interface.
4. reduce cost.One is saved cell from Control card ALARA Principle 4-6, effectively reduces direct cost; Adopt generic module design philosophy, effectively reduce development cost and management maintenance cost.
Accompanying drawing explanation
Fig. 1 is the topology diagram of lithium battery pack management system of the present invention;
Fig. 2 is the nucleus module structured flowchart of lithium battery pack management system of the present invention;
Fig. 3 is the master board card structure block diagram of lithium battery pack management system of the present invention;
Fig. 4 be lithium battery pack management system of the present invention from Control card structured flowchart;
Fig. 5 is the balanced management cellular construction block diagram of lithium battery pack management system of the present invention;
Fig. 6 is the balanced management control switch unit of lithium battery pack management system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Be illustrated in figure 1 the topology diagram of lithium battery pack management system of the present invention.The invention provides a kind of lithium battery fabric anomaly scheme, the program adopts master-slave mode distributed architecture, and common management N group lithium battery, often organizes lithium battery and be made up of 4-6 joint cell, can effectively reduce volume and system cost like this.In order to convenient management, ensure each lithium battery managing identical joint number from Control card as far as possible, such as, to provide the voltage of 220V, approximately need 68 joint lithium batteries, can be divided into 12 groups, wherein 10 groups is often organize 6 joints, and other two groups is often organize 4 joints.Often organize lithium battery directly to manage from Control card (data collecting plate card namely figure) by one piece.The coordinated management of master control board is each from Control card, realizes the indirect control to all batteries.Wherein, master control board and adopt CAN interface to carry out communication between Control card, from Control card and from not communication between Control card.On the other hand, master board cartoon crosses serial ports and host computer carries out communication, and send the data of system acquisition to host computer, host computer shows through process, realizes friendly man-machine interaction.
Be illustrated in figure 2 the core control panel card of lithium battery pack management system of the present invention.The present invention analyzes whole system design, proposes a kind of generic module design, analyzes and is extracted master control board and the total design requirement from Control card, and reserved suitable interface, constitute the core control panel card of design.Like this, different peripheral module of only need arranging in pairs or groups can form master control board and respectively from Control card.So be designed with following benefit: one, reduce development difficulty.Master control board will adopt identical MCU with from Control card, design and develop master control board and from the program of Control card time, have obvious advantage.Effectively can reduce the development difficulty of system and shorten the construction cycle; Two, reduce development and maintenance cost.Construction cycle shortens, and will reduce cost of human resources; After hardware modularity, the cost that hardware version upgrades can reduce; If certain module accidental damage, conveniently replaced module, reduces maintenance cost.
Core control panel card comprises MCU, CAN transceiver module, status indicator lamp, temperature detecting module, power management module, wherein MCU adopts identical control chip, but it is not identical with the software program run from Control card at master control board, in master control board, MCU mainly realizes SOC estimation and management of charging and discharging strategy and coordinated management from Control card, and carry out communication with upper computer software, mainly realize balanced management algorithm etc. from Control card; CAN transceiver module is for realizing the communication between master & slave control board, and all Control cards are all connected to CAN to carry out CAN communication; Status indicator lamp module is for showing the operating state of lithium battery and lithium battery management system, and abnormal show; Temperature detecting module is for detecting working temperature and the ambient temperature of battery, and for SOC estimation and lithium battery management provide call parameter, SOC estimates that the Kalman filtering algorithm of available improvement realizes; Power management module is used for providing safe and reliable power supply guarantee for master control board with from Control card.
Be illustrated in figure 3 the master board card structure figure of lithium battery pack management system of the present invention.This board is made up of core control panel card, serial port module, necessary peripheral interface.Described serial port module is used for and upper machine communication, and the information such as single lithium battery voltage, charging and discharging currents, temperature collected is passed to upper computer software; Accept the order sended over from host computer simultaneously, thus realize man-machine interaction.Discharge and recharge strategy: when charging, according to the cell voltage detected, judges which kind of state charging is in, and when lithium battery voltage is lower, adopts large current charge; When voltage reaches metastable platform, reduce charging current; When close to voltage saturation value, adopt tiny stream current charges; When reach capacity state time, battery pack enters floating charge state.In whole process, monitor the operating state of transformer station all the time, when transformer station needs DC power supply, switch to load discharge state.
Be illustrated in figure 4 lithium battery pack management system of the present invention from Control card structure chart.This board is primarily of core control panel card, voltage detection module, current detection module, balanced management module composition.Wherein, voltage detection module for monitoring the monomer voltage of lithium battery, on the one hand for detecting the health status of battery, on the other hand for battery estimation SOC, balanced management etc. provide reference data.Current detection module, for monitoring main line charging and discharging currents in lithium battery management system, guarantees system safety on the one hand, can provide management parameters on the other hand.Balanced management module is battery balanced for what realize between lithium battery group.Wherein balanced management module also comprises switch control unit, from the MCU of Control card according to the voltage data information gathered, formulate corresponding balanced management algorithm, output switch control signal gives described switch control unit, the lithium battery realizing voltage higher discharges, until realize balanced object.
Be illustrated in figure 5 the balanced management unit of lithium battery pack management system of the present invention.The object of Balance route reduces the inconsistency of lithium battery, improves the active volume that lithium battery is total, improves the useful life of lithium battery.When detecting that the battery difference in lithium battery group reaches the threshold value of opening equilibrium, being judged by voltage, getting rid of the possibility that the maximum or minimum lithium battery of voltage damages, after judging that cell health state is normal, open equilibrium, otherwise send abnormal alarm.After opening equilibrium, controller is according to the lithium battery voltage detected and the Balance route logical algorithm preset, opening and shutoff of control switch unit, make high-voltage battery be in discharge condition, until the potential difference of adjacent two batteries reaches shutoff threshold value, then judged by logic control algorithm, whether complete the balanced management of all batteries in group, if no, continue to perform until battery all meets condition for consistence in group, thus realize the Balance route to lithium battery.Because the discharge resistance resistance of Balance route is less, likely there is the situation that short time current is larger, therefore add necessary protective circuit, to make balanced management unit safe and reliable operation.
Be illustrated in figure 6 the balanced management switch control unit of lithium battery pack management system of the present invention.Wherein, Q2-Q7 is field effect transistor, and controller, by exporting CB1-CB6 level, controls the level of the grid G of field effect transistor, thus controls opening and shutoff of field effect transistor, plays on-off action.The resistance such as R18-R19, R23-R24 are discharge resistance, and why in parallel two resistance are, are because resistance is less, and discharging current is comparatively large, in case after the damage of some resistance, and still can normal reliable work.D3-D8 is protection diode, prevents field effect transistor breakdown.
Claims (6)
1. a lithium battery pack management system, is applied in the DC back-up power supply of transformer station, it is characterized in that: comprise
A master control board, connects each from Control card by CAN, for obtaining the information that each sends from Control card, and sends order to from each Control card;
N number of from Control card, for connecting N group lithium battery, eachly connect one group of lithium battery from Control card, for obtaining the parameter information of this group lithium battery;
Host computer, for being obtained the state information of lithium battery group from master control board by serial ports, and is shown; Send order by serial ports to master control board simultaneously, lithium battery group is managed.
2. a kind of lithium battery pack management system according to claim 1, is characterized in that: described lithium battery of often organizing is made up of 4 ~ 6 joint cells.
3. a kind of lithium battery pack management system according to claim 1, it is characterized in that: described master control board adds serial ports by core control panel card and IO expansion interface is formed, described serial ports is used for the communication of master control board and host computer, described core control panel card is used for the data of collection to send to host computer, accept the control command of host computer, and SOC estimation and charge and discharge control are carried out to lithium battery group.
4. a kind of lithium battery pack management system according to claim 1, is characterized in that: describedly comprise the current detection module of core control panel card and connection thereof, voltage detection module and balanced management module from Control card;
Described core control panel card is used for sticking into Serial Communication with master board, the data of collection is sent to master control board, accepts the control command of master control board, and provide balanced management to this Battery pack;
The charging and discharging currents of described current detection module on testing circuit main line;
Described voltage detection module is used for each joint single lithium battery voltage;
Described balanced management module is battery balanced for what manage in lithium battery group between each lithium battery monomer.
5. a kind of lithium battery pack management system according to claim 3 or 4, it is characterized in that: described core control panel card comprises temperature detecting module, CAN transceiver module, indicator light, the communication module of MCU and connection thereof, and the power management module for powering for above-mentioned modules;
Described MCU gathering and processing for the information of carrying out;
Described CAN transceiver module is used for master control board and communicating from Control card;
Described temperature detecting module, for monitoring temperature and the ambient temperature of lithium battery, provides temperature parameter for analyzing the health status of lithium battery;
Described communication module is used for communicating of master control board and host computer, to realize the transmission of the state information of lithium battery, control information and abnormal information;
Described indicator light is used to indicate operating state and the abnormal information of battery.
6. a kind of lithium battery pack management system according to claim 4, is characterized in that: described balanced management module comprises switch control unit and necessary protective circuit; Described switch control unit turns on and off according to equalization algorithm, makes part lithium battery realize electric discharge, finally reaches balanced object.
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| CN201310450992.3A CN104518530A (en) | 2013-09-29 | 2013-09-29 | Lithium battery pack management system |
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| CN201310450992.3A CN104518530A (en) | 2013-09-29 | 2013-09-29 | Lithium battery pack management system |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098219A (en) * | 2015-06-24 | 2015-11-25 | 杭州信控科技有限公司 | Portable universal battery standard module for electric vehicle |
| CN105375583A (en) * | 2015-12-09 | 2016-03-02 | 合肥国盛电池科技有限公司 | Management system and method of power lithium battery pack |
| CN105429221A (en) * | 2015-12-09 | 2016-03-23 | 合肥国盛电池科技有限公司 | Lithium-battery-pack-charging real-time control protection method and apparatus |
| CN105811531A (en) * | 2016-05-12 | 2016-07-27 | 芯创力源（北京）科技发展有限公司 | Novel power battery heath management system |
| CN106707216A (en) * | 2017-01-17 | 2017-05-24 | 广东电网有限责任公司电力科学研究院 | Distribution automation terminal battery management test system |
| CN107154666A (en) * | 2017-07-20 | 2017-09-12 | 山东圣阳电源股份有限公司 | A kind of batteries management system and electric power system |
| CN107612083A (en) * | 2017-10-10 | 2018-01-19 | 无锡东方高速艇发展有限公司 | Lithium electricity ship battery management system |
| CN108258343A (en) * | 2018-02-28 | 2018-07-06 | 北京国能电池科技股份有限公司 | From control module and battery management system |
| CN109546695A (en) * | 2017-09-22 | 2019-03-29 | 神华集团有限责任公司 | A kind of battery management method and device, equipment and system |
| CN110618964A (en) * | 2018-09-17 | 2019-12-27 | 科大国盾量子技术股份有限公司 | Quantum communication module self-management system |
| CN110911765A (en) * | 2019-10-24 | 2020-03-24 | 北京交通大学 | Battery equalization strategy verification platform |
| CN111092799A (en) * | 2019-12-26 | 2020-05-01 | 力神动力电池系统有限公司 | Automatic ID setting method applied to battery management system BMS |
| CN112467837A (en) * | 2020-11-20 | 2021-03-09 | 上海韧思能源科技有限公司 | Power or energy storage battery maintenance equipment and maintenance method |
| CN112865205A (en) * | 2019-11-12 | 2021-05-28 | 中国科学院沈阳自动化研究所 | System and method for controlling dissipation balance of starting power supply of unmanned helicopter engine |
| CN113078701A (en) * | 2020-10-30 | 2021-07-06 | 翊工动力科技(上海)有限公司 | Lithium battery charging management system and method thereof |
| CN114824516A (en) * | 2022-03-29 | 2022-07-29 | 珠海极海半导体有限公司 | Battery management system and SOC correction method thereof |
| CN117578657A (en) * | 2023-11-17 | 2024-02-20 | 徐州宏远通信科技有限公司 | Battery self-balancing method and system |
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| CN105375583A (en) * | 2015-12-09 | 2016-03-02 | 合肥国盛电池科技有限公司 | Management system and method of power lithium battery pack |
| CN105429221A (en) * | 2015-12-09 | 2016-03-23 | 合肥国盛电池科技有限公司 | Lithium-battery-pack-charging real-time control protection method and apparatus |
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| CN106707216A (en) * | 2017-01-17 | 2017-05-24 | 广东电网有限责任公司电力科学研究院 | Distribution automation terminal battery management test system |
| CN106707216B (en) * | 2017-01-17 | 2023-03-21 | 广东电网有限责任公司电力科学研究院 | Test system of distribution automation terminal battery management |
| CN107154666A (en) * | 2017-07-20 | 2017-09-12 | 山东圣阳电源股份有限公司 | A kind of batteries management system and electric power system |
| CN109546695A (en) * | 2017-09-22 | 2019-03-29 | 神华集团有限责任公司 | A kind of battery management method and device, equipment and system |
| CN107612083A (en) * | 2017-10-10 | 2018-01-19 | 无锡东方高速艇发展有限公司 | Lithium electricity ship battery management system |
| CN108258343A (en) * | 2018-02-28 | 2018-07-06 | 北京国能电池科技股份有限公司 | From control module and battery management system |
| CN110618964A (en) * | 2018-09-17 | 2019-12-27 | 科大国盾量子技术股份有限公司 | Quantum communication module self-management system |
| CN110911765A (en) * | 2019-10-24 | 2020-03-24 | 北京交通大学 | Battery equalization strategy verification platform |
| CN112865205A (en) * | 2019-11-12 | 2021-05-28 | 中国科学院沈阳自动化研究所 | System and method for controlling dissipation balance of starting power supply of unmanned helicopter engine |
| CN111092799A (en) * | 2019-12-26 | 2020-05-01 | 力神动力电池系统有限公司 | Automatic ID setting method applied to battery management system BMS |
| CN113078701A (en) * | 2020-10-30 | 2021-07-06 | 翊工动力科技(上海)有限公司 | Lithium battery charging management system and method thereof |
| CN112467837A (en) * | 2020-11-20 | 2021-03-09 | 上海韧思能源科技有限公司 | Power or energy storage battery maintenance equipment and maintenance method |
| CN114824516A (en) * | 2022-03-29 | 2022-07-29 | 珠海极海半导体有限公司 | Battery management system and SOC correction method thereof |
| CN114824516B (en) * | 2022-03-29 | 2023-10-27 | 珠海极海半导体有限公司 | Battery management system and SOC correction method thereof |
| CN117578657A (en) * | 2023-11-17 | 2024-02-20 | 徐州宏远通信科技有限公司 | Battery self-balancing method and system |
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Application publication date: 20150415 |