CN113178630A - Battery management system HBMS of multiple electric cores - Google Patents
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- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000009413 insulation Methods 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims description 38
- 238000012544 monitoring process Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 17
- 238000013461 design Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 27
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 24
- 229910052744 lithium Inorganic materials 0.000 description 24
- 238000000034 method Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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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
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
- 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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- 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
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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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- Microelectronics & Electronic Packaging (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a battery management system HBMS of multiple battery cells, which belongs to the technical field of battery management systems and comprises a master control module, a slave control module and a battery pack formed by connecting multiple battery cells in series and in parallel, wherein the master control module comprises a data acquisition unit, a battery protection module, a display unit module and a control component module, the slave control module comprises a current sensor, a voltage sensor, a temperature sensor, leakage detection and insulation detection, and the battery pack formed by connecting multiple battery cells in series and in parallel comprises multiple battery cell models 1, 2 and 3.
Description
Technical Field
The invention relates to the technical field of battery management systems, in particular to a battery management system HBMS of various battery cores.
Background
Due to the rapid development of the electric automobile industry, batteries with 5 years and 8 years of quality assurance continuously reach the retired years, and millions of groups of retired batteries exist every year according to the millions of years of electric automobile sales each year. The total annual amount of decommissioned batteries is 500 hundred million Wh, with an average of 50kWh of stored energy per battery group. According to the national standard, the capacity of the retired power battery is 80% of the initial capacity, and the capacity is 400 hundred million Wh. With the popularization of the electric automobile market, the annual output and sales volume of the electric automobile is estimated to reach 500 thousands and the retired power battery reaches 2000 hundred million watt-hour by 2025 years. Such huge amount of batteries need to be reused, and products capable of utilizing the retired batteries of the electric vehicles include low-speed electric vehicles and energy storage systems. Generally, the cells in the retired power battery system are differentiated after being used for a long time, and when the cells are reused, the cells cannot be directly used in a whole group in a gradient manner, and a separation and rearrangement process is needed. And the used battery has different use performance and decay rule from the new battery, and the battery management system also needs to make different schemes and strategies.
Chinese patent 201410023240.3 discloses a method for continuously tracking the health status of a battery by continuously monitoring the ambient temperature, humidity, battery temperature, and driving road conditions of the battery. This in turn brings much less expense to the study of echelon grouping and management strategies. The national monitoring platform also collects real-time data of each group of batteries, and can provide massive data in the aspects of group matching research and management strategy research. Patent application 201910777291.8 has designed a scheme that retired power battery joined in marriage group, collects the data of all batteries of the same model of same producer promptly, joins in marriage the group, because joined in marriage the group pond and reached the maximize, joined in marriage the group effect and can obtain optimizing. Patent application 201910502720.2 discloses a method for allocating groups of retired batteries by using echelon utilization, which comprises the steps of disassembling a battery system into minimum modules, and then testing and allocating the modules as battery cores. Patent 201610843085.9 develops a method for managing battery energy in a echelon manner, which designs an energy storage system into a plurality of parallel branches, calculates the real-time output power of each branch according to the output power requirement and the battery state of each branch, and sends the real-time output power to the converter of the corresponding branch through the CAN communication, so as to optimize the power configuration and energy management of each branch.
In the prior art, a battery system company which is utilized in an echelon mode may not obtain enough cells of the same model, but may purchase cells of various models of various manufacturers, how to match the cells at this time, and how to manage the battery system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a battery management system HBMS of various battery cells, improve the efficiency of echelon grouping and reduce the cost of echelon utilization.
In order to achieve the purpose, the invention adopts the technical scheme that: battery management system HBMS of multiple electric core, including host system, follow the group battery that accuse module and the many varieties electric core cluster are parallelly connected to be constituteed, host system includes data acquisition unit, battery protection module, display element module and control unit module, follow the accuse module and include current sensor, voltage sensor, temperature sensor, leakage detection and insulation detection, the group battery that many varieties electric core cluster are parallelly connected to be constituteed includes a plurality of electric core models 1, electric core model 2 and electric core model 3.
Preferably, the battery protection module comprises a liquid cooling system, an air cooling system, a voltage stabilizer system and an air switch, wherein the liquid cooling system wraps the outer surface of the battery pack formed by the series-parallel connection of the multiple types of electric cores, the air cooling system is positioned at the bottom or the top of the battery pack formed by the series-parallel connection of the multiple types of electric cores, the voltage stabilizer system is connected with the battery pack formed by the series-parallel connection of the multiple types of electric cores in parallel, and the air switch is connected with the battery pack formed by the series-parallel connection of the multiple types of electric cores in series.
Preferably, the display unit module comprises a display screen, the control component module comprises a fusing device and a relay, the fusing device is connected with the air switch, the master control module is connected with the slave control module through CAN communication, and the master control module manages the battery system according to a set management scheme and a set strategy.
Preferably, the current sensor, the voltage sensor, the temperature sensor, the leakage detection and the insulation detection are all connected with a battery pack formed by connecting multiple types of battery cells in series and parallel, and the current sensor, the voltage sensor, the temperature sensor, the leakage detection and the insulation detection are all connected with the main control module through the data acquisition unit.
Preferably, the plurality of the cell models 1 are connected in series, the plurality of the cell models 2 are connected in series and the plurality of the cell models 3 are connected in series, and the plurality of the cell models 1, 2 and 3 are connected in series to form the battery pack.
Preferably, the management scheme and the management policy are characterized by:
1. the power load rate of each battery cell is equivalent;
2. the SOC use interval change percentage of each string of the battery cells is equivalent;
3. monitoring whether the SOH change condition of each battery string continues the rule before the utilization of the battery string for a plurality of times;
4. monitoring the temperature distribution and the safety state of the battery system;
5. and balancing the battery system.
Preferably, the SOC usage interval change percentage refers to a designed cell usage SOC interval change percentage. For example, one cell design has an SOC interval of 30% to 70% with each percentage change of 0.4% SOC, and one cell design has an SOC interval of 10% to 100% with each percentage change of 0.9% SOC.
Preferably, the law of the change of the SOH refers to the change rate of the SOH with the cycle number under a given working condition.
Preferably, in the balancing, the SOC of each battery string is not adjusted to be consistent, but the change rate of the SOC usage interval is adjusted to be consistent.
Preferably, the power load rate refers to a performance degradation rate of the battery cell, such as capacity under the power, within a designed allowable interval.
Compared with the prior art, the invention has the beneficial effects that: the HBMS is provided with a current sensor, a voltage sensor, a temperature sensor, leakage detection and insulation detection, and is connected with a battery pack formed by connecting a plurality of types of battery cells in series and parallel, and the current sensor, the voltage sensor, the temperature sensor, the leakage detection and the insulation detection are all connected with a main control module through a data acquisition unit, so that the safety of the battery pack formed by connecting the plurality of types of battery cells in series and parallel can be gradually detected through the current sensor, the voltage sensor, the temperature sensor, the leakage detection and the insulation detection, when potential safety hazards appear, the main control module connected with the current sensor, the voltage sensor, the temperature sensor, the leakage detection and the insulation detection through the data acquisition unit can send instructions, and the HBMS is provided with a liquid cooling system, The air cooling system, the voltage stabilizer system and the air switch are matched, so that the liquid cooling system and the air cooling system can be used for physically cooling and radiating a battery pack formed by connecting a plurality of types of battery cells in series and parallel, the voltage stabilizer system can enhance the voltage stability of the battery pack formed by connecting the plurality of types of battery cells in series and parallel, the fusing device can close the air switch to protect the battery pack formed by connecting the plurality of types of battery cells in series and parallel, and simultaneously, as the battery management system HBMS of the plurality of battery cells is provided with the power load rate of each battery cell in series and parallel, the SOC use interval change percentage of each battery cell in series is equivalent, the rule of monitoring whether the SOH change condition of each battery cell in series continues to be utilized for echelon times or not is adopted, the temperature distribution and the safety state of the battery system are monitored, the battery system is balanced, the grouping efficiency of the system is improved, the shelving rate and the stock backlog rate are reduced, and the battery cells are grouped differently, the flexibility of echelon utilization is improved, echelon utilization cost is reduced, and cost expenses such as transportation, disassembly, test, processing are included.
Drawings
FIG. 1 is a schematic diagram of a multi-variety battery management system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "mounted," "connected," "secured," "sleeved," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, can be communicated inside two elements or can be in an interaction relationship of the two elements, and the specific meaning of the terms in the invention can be understood according to specific situations by a person skilled in the art
The first embodiment is as follows:
the invention provides a technical scheme that: the battery management system HBMS comprises a master control module, a slave control module and a battery pack formed by connecting multiple types of batteries in series and parallel, wherein the master control module comprises a data acquisition unit, a battery protection module, a display unit module and a control component module, the slave control module comprises a current sensor, a voltage sensor, a temperature sensor, leakage detection and insulation detection, and the battery pack formed by connecting multiple types of batteries in series and parallel comprises multiple types of batteries model 1, battery model 2 and battery model 3.
Furthermore, the battery protection module comprises a liquid cooling system, an air cooling system, a voltage stabilizer system and an air switch, wherein the liquid cooling system is wrapped on the outer surface of the battery pack formed by the series-parallel connection of the multiple types of electric cores, the air cooling system is positioned at the bottom or the top of the battery pack formed by the series-parallel connection of the multiple types of electric cores, the voltage stabilizer system is connected with the battery pack formed by the series-parallel connection of the multiple types of electric cores in parallel, and the air switch is connected with the battery pack formed by the series-parallel connection of the multiple types of electric cores in series.
Further, the display unit module comprises a display screen, the control component module comprises a fusing device and a relay, the fusing device is connected with the air switch, the master control module is connected with the slave control module through CAN communication, and the master control module manages the battery system according to a set management scheme and a set strategy.
Furthermore, the current sensor, the voltage sensor, the temperature sensor, the leakage detection and the insulation detection are connected with a battery pack formed by connecting multiple types of battery cells in series and in parallel, and the current sensor, the voltage sensor, the temperature sensor, the leakage detection and the insulation detection are connected with the main control module through the data acquisition unit.
Further, a plurality of electric core models 1 are established ties mutually, a plurality of electric core models 2 are established ties mutually and a plurality of electric core models 3 are established ties mutually, and a plurality of electric core models 1, electric core model 2 and electric core model 3 are established ties mutually and are constituteed the group battery.
Further, the management scheme and the management policy are characterized in that:
1. the power load rate of each battery cell is equivalent;
2. the SOC use interval change percentage of each string of the battery cells is equivalent;
3. monitoring whether the SOH change condition of each battery string continues the rule before the utilization of the battery string for a plurality of times;
4. monitoring the temperature distribution and the safety state of the battery system;
5. and balancing the battery system.
Further, the SOC usage interval change percentage refers to a designed cell usage SOC interval change percentage. For example, one cell design has an SOC interval of 30% to 70% with each percentage change of 0.4% SOC, and one cell design has an SOC interval of 10% to 100% with each percentage change of 0.9% SOC.
Further, the law of the change of the SOH refers to the change rate of the SOH with the number of cycles under a given working condition.
Further, in the balancing, the SOC of each cell string is not adjusted to be consistent, but the change rate of the SOC use interval is adjusted to be consistent.
Further, the power load rate means that the performance degradation rate of the battery cell, such as the capacity under the power, is within a designed allowable interval.
Example two:
the battery management system comprises a battery management system formed by mixing 100Ah0.5C ternary lithium batteries with 1000 cycle lives and 50Ah1C lithium iron phosphate batteries with 2000 cycle lives into a group:
according to design 72 volts, the ternary lithium battery is 3.6 volts, the lithium iron phosphate is 3.2 volts, 10 strings of ternary lithium batteries and 11 strings of lithium iron phosphate are selected.
10 strings of ternary lithium batteries are connected in series to obtain 36V, 11 strings of lithium iron phosphate are connected in series to obtain 35.2V, and the total rated voltage is 71.2V.
And respectively connecting the ternary lithium battery and the lithium iron phosphate battery in series and then connecting the ternary lithium battery and the lithium iron phosphate battery in series.
And the slave controller respectively acquires the voltage of 21 strings of battery cells and the set temperature of 21 temperature monitoring points.
And the master control obtains the voltage and temperature data of 21 battery cells through CAN communication.
According to the requirement of capacity, the SOC use range of the ternary lithium battery is 30% -80%, and the SOC use range of the lithium iron phosphate is 0% -100%.
1. The power load rate of each battery cell is equivalent, so that the whole group has the cycle life of 50Ah after 2000 times;
2. the SOC use interval change percentage of each battery string is equivalent, and each Ah corresponds to a change rate of 2%;
3. monitoring whether the SOH change condition of each battery string continues the rule before the utilization of the battery string for a plurality of times;
4. monitoring the temperature distribution and the safety state of the battery system;
5. and balancing the battery system. 30% SOC of the ternary lithium battery is consistent with 0% SOC of the lithium iron phosphate, and 80% SOC of the ternary battery is consistent with 100% SOC of the lithium iron phosphate.
Example three:
the battery management system comprises a battery management system formed by mixing 120Ah0.5C ternary lithium battery with the cycle life of 1200 times and 80Ah1C lithium iron phosphate batteries with the cycle life of 1500 times, wherein the battery management system comprises:
according to design 108 volts, the ternary lithium battery is 4.2 volts, the lithium iron phosphate is 3.2 volts, and 12 strings of ternary lithium batteries and 15 strings of lithium iron phosphate are selected.
The 12 strings of ternary lithium batteries are connected in series to obtain 28.8 volts, the 15 strings of lithium iron phosphate are connected in series to obtain 35.2 volts, and the total rated voltage is 67 volts.
And respectively connecting the ternary lithium battery and the lithium iron phosphate battery in series and then connecting the ternary lithium battery and the lithium iron phosphate battery in series.
The slave controller respectively collects the voltage of 27 strings of battery cells and the set temperature of 27 temperature monitoring points.
And the master control obtains the voltage and temperature data of 27 battery cells through CAN communication.
According to the requirement of capacity, the SOC use range of the ternary lithium battery is 40% -80%, and the SOC use range of the lithium iron phosphate is 0% -100%.
1. The power load rate of each series of battery cells is equivalent, so that the whole group reaches 1500 times of 50Ah cycle life;
2. the SOC use interval change percentage of each battery string is equivalent, and each Ah corresponds to a change rate of 3%;
3. monitoring whether the SOH change condition of each battery string continues the rule before the utilization of the battery string for a plurality of times;
4. monitoring the temperature distribution and the safety state of the battery system;
5. and balancing the battery system. The 40% SOC of the ternary lithium battery is consistent with the 0% SOC of the lithium iron phosphate, and the 80% SOC of the ternary battery is consistent with the 100% SOC of the lithium iron phosphate.
Example four:
the battery management system comprises a battery management system formed by mixing 150Ah0.5C ternary lithium batteries with 1500 times of cycle life and 100Ah1C lithium iron phosphate batteries with 2000 times of cycle life:
100 volts according to the design, the ternary lithium battery is 5 volts, the lithium iron phosphate is 4 volts, 10 strings of ternary lithium batteries and 12 strings of lithium iron phosphate are selected.
The 10 strings of ternary lithium batteries are connected in series to obtain 50 volts, the 12 strings of lithium iron phosphate are connected in series to obtain 48 volts, and the total rated voltage is 98 volts.
And respectively connecting the ternary lithium battery and the lithium iron phosphate battery in series and then connecting the ternary lithium battery and the lithium iron phosphate battery in series.
And the slave controller respectively acquires the voltage of 22 strings of battery cells and the set temperature of 22 temperature monitoring points.
And the master control obtains the voltage and temperature data of 22 battery cells through CAN communication.
According to the requirement of capacity, the SOC use range of the ternary lithium battery is 20% -80%, and the SOC use range of the lithium iron phosphate is 0% -100%.
1. The power load rate of each battery cell is equivalent, so that the whole group has the cycle life of 50Ah after 2000 times;
2. the SOC use interval change percentage of each battery string is equivalent, and each Ah corresponds to a change rate of 2%;
3. monitoring whether the SOH change condition of each battery string continues the rule before the utilization of the battery string for a plurality of times;
4. monitoring the temperature distribution and the safety state of the battery system;
5. and balancing the battery system. The 20% SOC of the ternary lithium battery is consistent with the 0% SOC of the lithium iron phosphate, and the 80% SOC of the ternary battery is consistent with the 100% SOC of the lithium iron phosphate.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. Battery management system HBMS of multiple electric core, including host system, from the group battery that control module and many varieties electric core series-parallel connection constitute, its characterized in that: the main control module comprises a data acquisition unit, a battery protection module, a display unit module and a control component module, the slave control module comprises a current sensor, a voltage sensor, a temperature sensor, leakage detection and insulation detection, and the battery pack formed by connecting multiple types of battery cells in series and in parallel comprises multiple battery cells of type 1, type 2 and type 3.
2. The battery management system HBMS of multiple cells of claim 1, wherein: the battery protection module comprises a liquid cooling system, an air cooling system, a voltage stabilizer system and an air switch, wherein the liquid cooling system wraps the outer surface of a battery pack formed by the serial-parallel connection of the multiple types of battery cells, the air cooling system is positioned at the bottom or the top of the battery pack formed by the serial-parallel connection of the multiple types of battery cells, the voltage stabilizer system is connected in parallel with the battery pack formed by the serial-parallel connection of the multiple types of battery cells, and the air switch is connected in series with the battery pack formed by the serial-parallel connection of the multiple types of battery cells.
3. The battery management system HBMS of multiple cells of claim 1, wherein: the display unit module comprises a display screen, the control component module comprises a fusing device and a relay, the fusing device is connected with the air switch, the master control module is connected with the slave control module through CAN communication, and the master control module manages the battery system according to a set management scheme and a set strategy.
4. The battery management system HBMS of multiple cells of claim 1, wherein: the current sensor, the voltage sensor, the temperature sensor, the leakage detection and the insulation detection are all connected with a battery pack formed by connecting multiple types of battery cells in series and in parallel, and the current sensor, the voltage sensor, the temperature sensor, the leakage detection and the insulation detection are all connected with the main control module through the data acquisition unit.
5. The battery management system HBMS of multiple cells of claim 1, wherein: it is a plurality of 1 looks series connections of electric core model, a plurality of 2 looks series connections of electric core model and a plurality of 3 looks series connections of electric core model, and it is a plurality of the electric core model 1, electric core model 2 and 3 looks series connections of electric core model constitute the group battery.
6. The battery management system HBMS of multiple cells of claim 3, wherein: the management scheme and the management strategy are characterized in that:
1. the power load rate of each battery cell is equivalent;
2. the SOC use interval change percentage of each string of the battery cells is equivalent;
3. monitoring whether the SOH change condition of each battery string continues the rule before the utilization of the battery string for a plurality of times;
4. monitoring the temperature distribution and the safety state of the battery system;
5. and balancing the battery system.
7. The battery management system HBMS of multiple cells of claim 6, wherein: the SOC use interval change percentage refers to the designed cell use SOC interval change percentage. For example, one cell design has an SOC interval of 30% to 70% with each percentage change of 0.4% SOC, and one cell design has an SOC interval of 10% to 100% with each percentage change of 0.9% SOC.
8. The battery management system HBMS of multiple cells of claim 6, wherein: the law of the change condition of the SOH refers to the change rate of the SOH along with the cycle number under a given working condition.
9. The battery management system HBMS of multiple cells of claim 6, wherein: in the balancing, the SOC of each string of battery cells is not adjusted to be consistent, but the change rate of the SOC use interval is adjusted to be consistent.
10. The battery management system HBMS of multiple cells of claim 6, wherein: the power load rate refers to that the performance degradation rate of the capacity and the like of the battery cell under the power is within a designed allowable interval.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114035068A (en) * | 2021-10-26 | 2022-02-11 | 上海兰钧新能源科技有限公司 | Hybrid battery system and residual capacity estimation method thereof |
| CN114142111A (en) * | 2022-02-07 | 2022-03-04 | 中国长江三峡集团有限公司 | Battery module and energy storage system |
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