CN116581403B - Battery module control method, system and circuit - Google Patents
Battery module control method, system and circuit Download PDFInfo
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- CN116581403B CN116581403B CN202310858024.XA CN202310858024A CN116581403B CN 116581403 B CN116581403 B CN 116581403B CN 202310858024 A CN202310858024 A CN 202310858024A CN 116581403 B CN116581403 B CN 116581403B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000002159 abnormal effect Effects 0.000 claims abstract description 43
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 238000003062 neural network model Methods 0.000 claims description 9
- 238000012937 correction Methods 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000004927 fusion Effects 0.000 claims description 4
- 238000007500 overflow downdraw method Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000001186 cumulative effect Effects 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a battery module control method, a system and a circuit, which belong to the field of batteries, wherein the service life of a battery cell can be corrected by building the circuit, detecting the battery cell with abnormal service life, removing the battery cell with abnormal service life, adjusting the real-time parameters of a battery pack, replacing the battery cell with abnormal service life in batches and the like, and the service life of the battery cell is accurately calculated; the control system controls the two switch switches of the battery core with abnormal service life to be closed through the isolation circuit, the battery core with abnormal service life is short-circuited, the power supply sequence is removed, the abnormal battery core is quickly and accurately withdrawn from the charge and discharge operation sequence under the condition that the battery pack is not replaced by the whole pack, a large amount of maintenance time and waiting time are saved through system adjustment, the influence of inconsistent new and old battery cores and the problem of pressure difference in the system in the whole pack replacement process is also solved, and the cost after sale and the storage problem of the accessory battery pack are saved.
Description
Technical Field
The invention relates to the field of batteries, in particular to a battery module control method, a battery module control system and a battery module control circuit.
Background
In the prior art, battery cells are connected in series to form a battery module by laser welding of tabs, then the battery module is connected in series into a box to be assembled into an energy storage battery pack, and the energy storage battery pack is connected in series and parallel to form an energy storage battery system; the service life of the currently used lithium iron phosphate battery core is continuously attenuated along with the use of the system, and the situation that the service life of an individual battery core is suddenly reduced happens due to the fact that the rate of attenuation of the battery core is inconsistent, so that the charging and discharging capacity of a single package are influenced due to the fact that the service life of the battery core is suddenly reduced, and therefore cluster capacity and system capacity are sequentially influenced, and the use requirement of the whole energy storage power station is not met.
The patent CN112585487a and CN114545271a both disclose battery life detection methods, in the prior art, when a sharp decrease of the life of an individual battery cell is detected, passive equalization or active equalization is often adopted, but the passive equalization can cause a heat dissipation problem, and the active equalization needs to be configured with corresponding equipment and energy storage elements, so that the cost is high.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a battery module control method capable of avoiding the influence of a battery cell with abnormal service life on a battery pack.
In order to overcome the defects in the prior art, the second object of the invention is to provide a battery module control system, which can avoid the influence of the battery cells with abnormal service lives on a battery pack.
In order to overcome the defects in the prior art, the third objective of the invention is to provide a battery module control circuit which can avoid the influence of the battery cells with abnormal service lives on a battery pack.
One of the purposes of the invention is realized by adopting the following technical scheme:
a battery module control method, comprising the steps of:
s1: the battery module comprises a plurality of battery cores, two change-over switches are arranged between two adjacent battery cores, the two change-over switches are a first change-over switch and a second change-over switch respectively, one end of the first change-over switch is connected with the negative electrode of the battery core and the second change-over switch respectively, one end of the second change-over switch is connected with the positive electrode of the battery core and the first change-over switch, and when the first change-over switch and the second change-over switch are in an off state, the two adjacent battery cores are connected in series;
s2: collecting various parameters of the complete life cycle of the battery core, taking the various parameters as input features, calculating the input features by adopting a neural network model, and constructing a battery core life model by adopting a feature fusion mode from output values of the neural network model;
s3: acquiring the ambient temperature, the position information of each battery cell and the real-time parameters of each battery cell, inputting the real-time parameters of the battery cells into a battery cell life model to obtain the real-time life of the battery cells, and correcting the real-time life of the battery cells according to the position information of each battery cell and the ambient temperature to judge whether the battery cells with abnormal life occur;
s4: the control system controls the two change-over switches of the battery core with abnormal service life to be closed through the isolation circuit, so that the battery core with abnormal service life is short-circuited, and the power supply sequence is removed;
s5: the control system reports the number and the positions of the battery cells with abnormal service life, and adjusts the real-time parameters of the battery pack according to the number of the battery cells with abnormal service life;
s6: when the number of the battery cells with abnormal service lives reaches a preset value, carrying out batch replacement according to the recorded positions of the battery cells with abnormal service lives.
Further, in step S2, the method for constructing the battery life model by using the feature fusion method to the output value of the neural network model specifically includes: and taking the output values of the various parameters as characteristics, sequentially setting the weight coefficients of the characteristics, and then carrying out weighted calculation and addition on the characteristics class by class according to the weight coefficients to construct and output the battery cell life model.
Further, in step S3, when the ambient temperature is greater than the preset temperature range, the correction coefficient is a 1 When the ambient temperature is less than the preset temperature range, the correction coefficient is a 2 。
Further, in step S3, by changing a single variable of the ambient temperature, maintaining the working state, the position of the battery cell, and the real-time parameters of the battery cell unchanged, calculating the life of the battery cell, and comparing with a reference value to obtain a 1 A) 2 。
Further, in step S3, it is further required to determine whether the battery cell is in an operating state or an off-line state during detection, and when the battery cell is in the operating state, the operating temperature of the battery cell is obtained, and the service life of the battery cell is further corrected according to the operating temperature, where the correction coefficient is a 3 。
Further, in step S3, by changing a single variable of the working state, keeping the ambient temperature, the position of the battery cell and the real-time parameters of the battery cell unchanged, calculating the life of the battery cell, and comparing with a reference value to obtain a 3 。
Further, in step S3, the real-time parameters of the battery pack include voltage, current, and capacitance.
The second purpose of the invention is realized by adopting the following technical scheme:
the battery module control system for implementing the battery module control method comprises a plurality of battery cells and a control system, wherein the battery cells are connected in series, each battery cell comprises two switch switches, the two switch switches are a first switch and a second switch respectively, one end of each first switch is connected with a battery cell negative electrode and a second switch respectively, one end of each second switch is connected with a battery cell positive electrode and the first switch, and when the first switch and the second switch are in an off state, two adjacent battery cells are connected in series; the control system is electrically connected with the two switches of each battery cell through the isolation circuit, and when the service life of the battery cell is normal, the two switches are disconnected; when the service life of the battery cell is abnormal, the control system controls the two switching switches to be closed, so that the short circuit of the battery cell is removed from the power supply sequence.
The third purpose of the invention is realized by adopting the following technical scheme:
the battery module control circuit for implementing the battery module control method comprises a plurality of battery cells and a control circuit, wherein the battery cells are connected in series, the control circuit is electrically connected with each battery cell, each battery cell comprises two change-over switches, the change-over switches are arranged between two adjacent battery cells, the two change-over switches are respectively a first change-over switch and a second change-over switch, one end of each first change-over switch is respectively connected with a negative electrode of the battery cell and the second change-over switch, one end of each second change-over switch is connected with a positive electrode of the battery cell and the first change-over switch, and when the first change-over switch and the second change-over switch are in an off state, the two adjacent battery cells are connected in series; the battery module control circuit further comprises an isolation circuit, the control system is electrically connected with the two switching switches of each battery cell through the isolation circuit, and when the service life of the battery cell is normal, the two switching switches are disconnected; when the service life of the battery cell is abnormal, the control circuit controls the two switching switches to be closed, so that the short circuit of the battery cell is removed from the power supply sequence.
Compared with the prior art, the battery module control method has the advantages that the service life of the battery cells is calculated, the service life of the battery cells is corrected according to the position information of each battery cell and the ambient temperature, and the calculation of the service life of the battery cells is accurate; the control system controls the two switch switches of the battery core with abnormal service life to be closed through the isolation circuit, the battery core with abnormal service life is short-circuited, the power supply sequence is removed, the abnormal battery core is quickly and accurately withdrawn from the charge and discharge operation sequence under the condition that the battery pack is not replaced by the whole pack, a large amount of maintenance time and waiting time are saved through system adjustment, the influence of inconsistent new and old battery cores and the problem of pressure difference in the system in the whole pack replacement process is also solved, and the cost after sale and the storage problem of the accessory battery pack are saved.
Drawings
FIG. 1 is a flowchart of a method for controlling a battery module according to the present invention;
fig. 2 is a circuit diagram of a control circuit of a battery module according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or be present as another intermediate element through which the element is fixed. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the battery module control method of the present invention includes the steps of:
s1: the battery module comprises a plurality of battery cores, two change-over switches are arranged between two adjacent battery cores, the two change-over switches are a first change-over switch and a second change-over switch respectively, one end of the first change-over switch is connected with the negative electrode of the battery core and the second change-over switch respectively, one end of the second change-over switch is connected with the positive electrode of the battery core and the first change-over switch, and when the first change-over switch and the second change-over switch are in an off state, the two adjacent battery cores are connected in series;
s2: collecting various parameters of the complete life cycle of the battery core, taking the various parameters as input features, calculating the input features by adopting a neural network model, and constructing a battery core life model by adopting a feature fusion mode from output values of the neural network model;
s3: acquiring the ambient temperature, the position information of each battery cell and the real-time parameters of each battery cell, inputting the real-time parameters of the battery cells into a battery cell life model to obtain the real-time life of the battery cells, and correcting the real-time life of the battery cells according to the position information of each battery cell and the ambient temperature to judge whether the battery cells with abnormal life occur;
s4: the control system controls the two change-over switches of the battery core with abnormal service life to be closed through the isolation circuit, so that the battery core with abnormal service life is short-circuited, and the power supply sequence is removed;
s5: the control system reports the number and the positions of the battery cells with abnormal service life, and adjusts the real-time parameters of the battery pack according to the number of the battery cells with abnormal service life;
s6: when the number of the battery cells with abnormal service lives reaches a preset value, carrying out batch replacement according to the recorded positions of the battery cells with abnormal service lives.
Specifically, in step S2, the multiple parameters of the complete life cycle of the battery cell include a cumulative amount of charge, a cumulative amount of discharge, a cumulative amount of charge power, a cumulative amount of discharge power, a cumulative amount of charge duration, a cumulative amount of discharge duration, a total cumulative amount of charge and discharge duration, a storage capacity, an internal resistance, a voltage, a current, and a capacitance.
The output value of the neural network model is subjected to characteristic fusion to construct a battery cell life model, which comprises the following steps: and taking the output values of the various parameters as characteristics, sequentially setting the weight coefficients of the characteristics, and then carrying out weighted calculation and addition on the characteristics class by class according to the weight coefficients to construct and output the battery cell life model.
Specifically, in step S3, since the influence of the external environment temperature is different when the battery cells are at different positions, the influence factor of the external environment temperature on the battery cells is determined according to the position information of each battery cell, so that the service life of the battery cells is accurately calculated.
The suitable ambient temperature of the battery core is 0-40 ℃, the temperature of the electrolyte in the battery is low, the capacity output is less, the temperature of the electrolyte in the battery is high, and the capacity output is high. But when the ambient temperature is lower than 0 degrees and higher than 40 degrees, the service life of the battery cell is seriously affected. By changing single variable of ambient temperature, keeping the working state, the position of the battery cell and the real-time parameters of the battery cell unchanged, calculating the service life of the battery cell, and comparing the service life with a reference value to obtain a correction coefficient a when the ambient temperature is greater than a preset temperature range 1 Is a numerical value of (2); and when the ambient temperature is less than the preset temperature range, correcting the coefficient a 2 Is a numerical value of (2).
Because the battery cell can generate heat during operation, when the battery cell detects the service life, if the battery cell is in the working state, the service life of the battery cell can be influenced, therefore, in the step of detecting the abnormal service life of the battery cell, the battery cell is still required to be judged to be in the working state or in the off-line state during detection, when the battery cell is in the working state, the working temperature of the battery cell is obtained, the service life of the battery cell is further corrected according to the working temperature, and the correction coefficient is a 3 . By changing a single variable of the working state, keeping the ambient temperature, the position of the battery cell and the real-time parameters of the battery cell unchanged, calculating the service life of the battery cell, and comparing the service life with a reference value to obtain a 3 。
The invention also relates to a battery module control system for implementing the battery module control method, which comprises a plurality of battery cells and a control system, wherein the battery cells are connected in series, each battery cell comprises two change-over switches, the two change-over switches are respectively a first change-over switch and a second change-over switch, one end of the first change-over switch is respectively connected with the negative electrode of the battery cell and the second change-over switch, one end of the second change-over switch is connected with the positive electrode of the battery cell and the first change-over switch, and when the first change-over switch and the second change-over switch are in a disconnection state, the two adjacent battery cells are connected in series; the control system is electrically connected with the two switching switches of each battery cell through the isolation circuit, and when the service life of the battery cell is normal, the two switching switches are disconnected; when the service life of the battery cell is abnormal, the control system controls the two transfer switches to be closed, so that the short circuit of the battery cell is removed from the power supply sequence.
With reference to fig. 2, the present invention further relates to a battery module control circuit for implementing the above battery module control method, which includes a plurality of battery cells and a control circuit, wherein the plurality of battery cells are connected in series, the control system is electrically connected with each battery cell, each battery cell includes two switches, the two switches are a first switch and a second switch, one end of the first switch is connected with a negative electrode of the battery cell and the second switch, one end of the second switch is connected with a positive electrode of the battery cell and the first switch, and when the first switch and the second switch are in an off state, the adjacent two battery cells are connected in series; the battery module control circuit also comprises an isolation circuit, wherein the control circuit is electrically connected with the two switches of each battery cell through the isolation circuit, and when the service life of the battery cell is normal, the two switches are disconnected; when the service life of the battery cell is abnormal, the control system controls the two transfer switches to be closed, so that the short circuit of the battery cell is removed from the power supply sequence.
Compared with the prior art, the battery module control method has the advantages that the service life of the battery cells is calculated, the service life of the battery cells is corrected according to the position information of each battery cell and the ambient temperature, and the calculation of the service life of the battery cells is accurate; the control system controls the two switch switches of the battery core with abnormal service life to be closed through the isolation circuit, the battery core with abnormal service life is short-circuited, the power supply sequence is removed, the abnormal battery core is quickly and accurately withdrawn from the charge and discharge operation sequence under the condition that the battery pack is not replaced by the whole pack, a large amount of maintenance time and waiting time are saved through system adjustment, the influence of inconsistent new and old battery cores and the problem of pressure difference in the system in the whole pack replacement process is also solved, and the cost after sale and the storage problem of the accessory battery pack are saved.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, it is possible to make several modifications and improvements without departing from the concept of the present invention, which are equivalent to the above embodiments according to the essential technology of the present invention, and these are all included in the protection scope of the present invention.
Claims (9)
1. A battery module control method, comprising the steps of:
s1: the battery module comprises a plurality of battery cores, two change-over switches are arranged between two adjacent battery cores, the two change-over switches are a first change-over switch and a second change-over switch respectively, one end of the first change-over switch is connected with the negative electrode of the battery core and the second change-over switch respectively, one end of the second change-over switch is connected with the positive electrode of the battery core and the first change-over switch, and when the first change-over switch and the second change-over switch are in a disconnection state, the two adjacent battery cores are connected in series;
s2: collecting various parameters of the complete life cycle of the battery core, taking the various parameters as input features, calculating the input features by adopting a neural network model, and constructing a battery core life model by adopting a feature fusion mode from output values of the neural network model;
s3: acquiring the ambient temperature, the position information of each battery cell and the real-time parameters of each battery cell, inputting the real-time parameters of the battery cells into a battery cell life model to obtain the real-time life of the battery cells, and correcting the real-time life of the battery cells according to the position information of each battery cell and the ambient temperature to judge whether the battery cells with abnormal life occur;
s4: the control system controls the two change-over switches of the battery core with abnormal service life to be closed through the isolation circuit, so that the battery core with abnormal service life is short-circuited, and the power supply sequence is removed;
s5: the control system reports the number and the positions of the battery cells with abnormal service life, and adjusts the real-time parameters of the battery pack according to the number of the battery cells with abnormal service life;
s6: when the number of the battery cells with abnormal service lives reaches a preset value, carrying out batch replacement according to the recorded positions of the battery cells with abnormal service lives.
2. The battery module control method according to claim 1, wherein: in step S2, the method for constructing the battery life model by adopting the feature fusion method to the output value of the neural network model specifically includes: and taking the output values of the various parameters as characteristics, sequentially setting the weight coefficients of the characteristics, and then carrying out weighted calculation and addition on the characteristics class by class according to the weight coefficients to construct and output the battery cell life model.
3. The battery module control method according to claim 1, wherein: in step S3, when the ambient temperature is greater than the preset temperature range, the correction coefficient is a 1 When the ambient temperature is less than the preset temperature range, the correction coefficient is a 2 。
4. The battery module control method according to claim 3, wherein: in step S3, the service life of the battery cell is calculated by changing the single variable of the ambient temperature, keeping the working state, the position of the battery cell and the real-time parameters of the battery cell unchanged, and comparing the service life with a reference value to obtain a 1 A) 2 。
5. The battery module control method according to claim 1, wherein: in step S3, it is also necessary to determine whether the battery cell is in an operating state or an off-line state during detection, and when the battery cell is in the operating state, the operating temperature of the battery cell is obtained, and the service life of the battery cell is further corrected according to the operating temperature, where the correction coefficient is a 3 。
6. The battery module of claim 5The group control method is characterized in that: in step S3, the service life of the battery cell is calculated by changing a single variable of the working state, keeping the ambient temperature, the position of the battery cell and the real-time parameters of the battery cell unchanged, and comparing the calculated service life with a reference value to obtain a 3 。
7. The battery module control method according to claim 1, wherein: in step S3, the real-time parameters of the battery pack include voltage, current, and capacitance.
8. A battery module control system for implementing the battery module control method of any one of claims 1 to 7, comprising a plurality of electric cells and a control system, wherein the plurality of electric cells are connected in series, and the battery module control system is characterized in that: each battery cell comprises two switch switches, wherein the two switch switches are a first switch and a second switch respectively, one end of the first switch is connected with the negative electrode of the battery cell and the second switch respectively, one end of the second switch is connected with the positive electrode of the battery cell and the first switch, and when the first switch and the second switch are in an off state, two adjacent battery cells are connected in series; the control system is electrically connected with the two switches of each battery cell through the isolation circuit, and when the service life of the battery cell is normal, the two switches are disconnected; when the service life of the battery cell is abnormal, the control system controls the two switching switches to be closed, so that the short circuit of the battery cell is removed from the power supply sequence.
9. A battery module control circuit for implementing the battery module control method of any one of claims 1 to 7, comprising a plurality of electric cells and a control circuit, wherein the electric cells are connected in series, and the control circuit is electrically connected with each electric cell, and is characterized in that: each cell comprises two change-over switches, the change-over switches are arranged between two adjacent cells, the two change-over switches are a first change-over switch and a second change-over switch respectively, one end of each first change-over switch is connected with the negative electrode of the cell and the second change-over switch respectively, one end of each second change-over switch is connected with the positive electrode of the cell and the first change-over switch, and when the first change-over switch and the second change-over switch are in an off state, the two adjacent cells are connected in series; the battery module control circuit further comprises an isolation circuit, the control system is electrically connected with the two switching switches of each battery cell through the isolation circuit, and when the service life of the battery cell is normal, the two switching switches are disconnected; when the service life of the battery cell is abnormal, the control circuit controls the two switching switches to be closed, so that the short circuit of the battery cell is removed from the power supply sequence.
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| CN103534859B (en) * | 2011-03-17 | 2017-03-29 | 电动车芯片能量有限公司 | battery pack system |
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| CN101969214A (en) * | 2010-10-09 | 2011-02-09 | 华为技术有限公司 | Battery pack and control method thereof |
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| CN114336823A (en) * | 2022-01-17 | 2022-04-12 | 成都康斯维智慧能源技术有限公司 | Intelligent device for safely replacing battery in battery working state and replacement method |
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Address after: West of Building 28, No. 2, Mount Taishan Road, High tech Zone, Suzhou City, Jiangsu Province, 215000 Patentee after: Suzhou Jingkong Energy Technology Co.,Ltd. Address before: West of Building 28, No. 2, Mount Taishan Road, High tech Zone, Suzhou City, Jiangsu Province, 215000 Patentee before: SUZHOU JK ENERGY Ltd. |
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