CN112652837A - Periodic circulating flow lithium ion battery cooling system and cooling method - Google Patents
Periodic circulating flow lithium ion battery cooling system and cooling method Download PDFInfo
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- CN112652837A CN112652837A CN202011530126.1A CN202011530126A CN112652837A CN 112652837 A CN112652837 A CN 112652837A CN 202011530126 A CN202011530126 A CN 202011530126A CN 112652837 A CN112652837 A CN 112652837A
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
A cooling system and a cooling method for a periodically circulating flow lithium ion battery are provided, wherein the cooling system comprises a working medium flow channel arranged around a battery pack, turning valves are respectively arranged around the battery pack, the size of each turning valve is equal to the caliber of the working medium flow channel, and the flow direction of a cooling working medium on the battery pack can be correspondingly adjusted by adjusting the turning valves. The cooling method is divided into the following two working states for control in one cooling working period: in a first working state, a first turnover valve and a fourth turnover valve are opened, a third turnover valve and a second turnover valve are closed, and a cooling working medium enters from the first turnover valve and flows out from the fourth turnover valve; and in the second working state, the first turnover valve and the fourth turnover valve are closed, the third turnover valve and the second turnover valve are opened, and the cooling working medium enters from the third turnover valve and flows out from the second turnover valve. The invention can obviously reduce the temperature difference of the cooling working medium in the flowing direction.
Description
Technical Field
The invention belongs to the field of new energy batteries, and relates to a periodic circulating flow lithium ion battery cooling system and a cooling method.
Background
Lithium ion batteries are widely used in electric vehicles due to their high power density and charge-discharge efficiency. If electrochemical reaction heat, polarization heat and joule heat generated by the battery in the charging and discharging process are not effectively dissipated in time, the temperature of the battery can be rapidly increased, thermal runaway occurs, and even safety problems such as combustion and explosion occur. According to statistics, when the working temperature of the battery is 30-40 ℃, the service life of the battery is reduced by about 2 months when the temperature is increased by 1 ℃. Therefore, the battery thermal management system can maintain the temperature of the battery pack in the optimal working temperature range (the optimal working temperature range of lithium ions is 25-40 ℃, the temperature difference is less than 5 ℃) and has important significance for improving the service performance and prolonging the service life of the battery. In the prior art, on one hand, in the conventional unidirectional flow cooling system, a cooling working medium enters from one end of the battery pack, and flows out from the other end of the battery pack, so that the temperature of the working medium is higher along the air flow direction, the temperature of the downstream battery is higher than that of the upstream battery, a temperature gradient is formed, and the temperature difference is increased along with the increase of the discharge rate. On the other hand, the existing battery pack heat dissipation structure is not reasonable enough, and the efficiency of a battery heat management system is not high, so that the electric vehicle is subjected to fire and explosion accidents occasionally, and potential safety hazards and defects in design are caused.
Disclosure of Invention
The invention aims to provide a periodic circulating flow lithium ion battery cooling system and a cooling method aiming at the problem of uneven cooling temperature of a battery module in the prior art, so that the temperature difference of the flow direction of a cooling working medium is obviously reduced.
In order to achieve the purpose, the invention has the following technical scheme:
the utility model provides a periodic circulation flow lithium ion battery cooling system, is including the working medium runner that encircles the group battery and arrange, and the group battery is provided with the upset valve respectively all around, and the size of upset valve equals with the bore of working medium runner, can correspond the flow direction of adjusting cooling working medium on the group battery through adjusting the upset valve.
Preferably, each turnover valve is provided with a temperature sensor, and the temperature sensor is connected with a high-temperature alarm.
Preferably, the temperature sensor and the turnover valve are both connected with a control system, and the control system controls the opening and closing of the turnover valve according to the collected temperature.
Preferably, the temperature sensor is arranged on the wall surface of the working medium flow passage on the inner side of the turnover valve.
Preferably, the inlet of the working medium flow passage is provided with a circulating pump, and the inlet and the outlet of the working medium flow passage are separately arranged.
Preferably, along the working medium flow direction, the turnover valve comprises a first turnover valve, a third turnover valve, a fourth turnover valve and a second turnover valve which are arranged on the periphery of the battery pack in sequence, the first turnover valve and the fourth turnover valve are opened or closed simultaneously, and the third turnover valve and the second turnover valve are opened or closed simultaneously.
The invention also provides a cooling method based on the periodic circulating flow lithium ion battery cooling system, which is divided into the following two working states for control in one cooling working period:
the first working state: the first turnover valve and the fourth turnover valve are opened, the third turnover valve and the second turnover valve are closed, and the cooling working medium enters from the first turnover valve and flows out from the fourth turnover valve;
the second working state: the first turnover valve and the fourth turnover valve are closed, the third turnover valve and the second turnover valve are opened, and the cooling working medium enters from the third turnover valve and flows out from the second turnover valve.
Preferably, the battery pack is divided into four regions, and the first, second, third and fourth rollover valves are arranged corresponding to the first, second, third and fourth regions of the battery pack; the first region and the second region of the battery pack are cooled in the first operating state, and the third region and the fourth region of the battery pack are cooled in the second operating state.
Compared with the prior art, the cooling system has the following beneficial effects: the working medium flow channel arranged around the battery pack is adopted, the flow direction of the cooling working medium on the battery pack is correspondingly adjusted by adjusting the turnover valve, and the temperature difference in the flow direction of the working medium can be obviously reduced by adopting periodic circulating flow. The invention can fully utilize the cooling working medium, thereby improving the cooling effect, reducing the temperature gradient generated by the unidirectional air flow by utilizing the periodic reversion, realizing uniform cooling and having good cooling effect.
Furthermore, every upset valve department all is provided with temperature sensor, monitors through temperature sensor, and when valve department high temperature, temperature sensor can be to the high temperature alarm signaling, and the high temperature alarm can send the unusual early warning of temperature after that, reminds timely flow direction to the cooling working medium to adjust, can furthest reduce the operating time that the group battery was located in high temperature environment like this, makes the security of group battery work obtain further improvement.
Furthermore, temperature sensor and the equal connected control system of upset valve, temperature sensor sends the temperature information who gathers for control system, and control system automatic control upset valve opens and shuts, and the real-time is better, further prolongs the life of group battery, increases electric automobile's security.
Compared with the prior art, the cooling method is easy to operate and realize, can obviously reduce the temperature difference of the working medium in the flowing direction, ensures the cooling uniformity of the battery pack, and improves the service life and the safety of the battery pack.
Drawings
Fig. 1 is a schematic view of the zone division of the battery pack of the present invention;
FIG. 2 is a schematic view of a first operating state of the cooling method of the present invention;
FIG. 3 is a schematic view of a second operating state of the cooling method of the present invention;
in the drawings: 1-a battery pack; 2-a working medium flow passage; 3-a circulating pump; 4-a first roll-over valve; 5-a second roll-over valve; 6-a third rollover valve; 7-a fourth rollover valve; 8-a first temperature sensor; 9-a second temperature sensor; 10-a third temperature sensor; 11-fourth temperature sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 2 and 3, the periodic circulating flow lithium ion battery cooling system of the invention comprises a working medium flow channel 2 arranged around a battery pack 1, wherein the periphery of the battery pack 1 is respectively provided with a turnover valve, the turnover valve comprises a first turnover valve 4, a third turnover valve 6, a fourth turnover valve 7 and a second turnover valve 5 which are sequentially arranged around the battery pack 1 along the working medium flow direction, and the size of the turnover valve is equal to the caliber of the working medium flow channel 2. Every upset valve department all is provided with temperature sensor, and first upset valve 4 department is equipped with first temperature sensor 8, and third upset valve 6 department is equipped with third temperature sensor 10, and fourth upset valve 7 department is equipped with fourth temperature sensor 11, and second upset valve 5 department is equipped with second temperature sensor 9. The temperature sensor is arranged on the wall surface of the working medium flow passage 2 at the inner side of the turnover valve. The flow direction of the cooling working medium on the battery pack 1 can be correspondingly adjusted by adjusting the turnover valve, the first turnover valve 4 and the fourth turnover valve 7 are opened or closed simultaneously, and the third turnover valve 6 and the second turnover valve 5 are opened or closed simultaneously. Temperature sensor connects high temperature alarm, and temperature sensor and the equal connection control system of upset valve, when valve department high temperature, temperature sensor can send a signal to high temperature alarm, and high temperature alarm can send the unusual early warning of temperature after that to control system can be timely adjusts the cooling working medium flow direction, can reduce the operating time that the group battery was located in high temperature environment like this furthest, thereby the life of extension group battery and the security that increases electric automobile. And a circulating pump 3 is arranged at the inlet of the working medium flow passage 2, and the inlet and the outlet of the working medium flow passage 2 are separately arranged. The system monitors the temperature of the turnover valve through the temperature sensor, and controls the opening and closing of the turnover valve to control the inlet and the outlet of the cooling working medium and the flow channel, so that a better cooling effect is achieved, and the battery pack works in a proper temperature range.
The cooling method of the periodic circulating flow-based lithium ion battery cooling system comprises the following steps:
the control is carried out by dividing the working state into two working states in one cooling working period;
the first working state: the first turnover valve 4 and the fourth turnover valve 7 are opened, the third turnover valve 6 and the second turnover valve 5 are closed, and cooling working media enter from the first turnover valve 4 and flow out from the fourth turnover valve 7; the temperature sensors are all in working state. The flow direction of the cooling working medium is shown as the arrow direction in fig. 2, and the temperature gradient of the cooling working medium from the first turnover valve 4 to the fourth turnover valve 7 is gradually increased. The working state is the working state of the battery thermal management system in the first half cycle.
The second working state: the first turnover valve 4 and the fourth turnover valve 7 are closed, the third turnover valve 6 and the second turnover valve 5 are opened, and a cooling working medium enters from the third turnover valve 6 and flows out from the second turnover valve 5; the temperature sensors are all in working state. The flow direction of the cooling working medium is shown as the arrow direction in fig. 3, and the temperature gradient of the cooling working medium is gradually increased from the third turnover valve 6 to the second turnover valve 5. The working state is the working state of the lower half cycle of the battery thermal management system.
Referring to fig. 1, the battery pack 1 is divided into four regions, and a first tumble valve 4, a second tumble valve 5, a third tumble valve 6, and a fourth tumble valve 7 are disposed corresponding to the first region, the second region, the third region, and the fourth region of the battery pack 1.
When in the first operating state (i.e., the first half cycle), the first temperature sensor 8 and the second temperature sensor 9 do not give an early warning in a normal situation because the cooling of the batteries in the first region and the second region is mainly performed. During the last half cycle, the third and fourth zone batteries are not cooled sufficiently and the temperature will rise slightly. If the temperature rise gradient is not large, the third temperature sensor 10 and the fourth temperature sensor 11 do not give an early warning. If the temperature of the battery pack 1 in the third zone or the fourth zone is increased more in the last half period, the third temperature sensor 10 and the fourth temperature sensor 11 may issue a high temperature warning. After the high-temperature early warning appears, even when the battery is in the first working state of the first half cycle, the battery thermal management system can forcibly end the first working state and enter the second working state, so that the batteries in the third region and the fourth region are cooled in time.
When in the second operating state (i.e. the next half cycle), the third temperature sensor 10 and the fourth temperature sensor 11 normally do not give an early warning because of the cooling that is mainly performed on the batteries of the third zone and the fourth zone. During the next half cycle, the first and second zone batteries are not cooled sufficiently and the temperature will rise slightly. If the temperature rise gradient is not large, the first temperature sensor 8 and the second temperature sensor 9 do not give an early warning. If the temperature of the battery pack 1 in the first zone or the second zone is increased more in the last half period, the first temperature sensor 8 and the second temperature sensor 9 may give a high temperature warning. After the high-temperature early warning appears, even if the battery is in the second working state of the next half period, the battery thermal management system can forcibly end the second working state and enter the first working state, so that the batteries in the first area and the second area are cooled in time.
When the battery thermal management system is started, firstly, a first working state is entered, whether the third temperature sensor 10 and the fourth temperature sensor 11 perform high-temperature early warning or not is judged, if yes, the second working state is directly entered, and if not, the first working state is continued for a half cycle; after entering the second working state, judging whether the first temperature sensor 8 and the second temperature sensor 9 perform high-temperature early warning, if so, directly entering the first working state, and if not, continuing the second working state for half a period; thus circulating.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and it should be understood by those skilled in the art that the technical solution can be modified and replaced by a plurality of simple modifications and replacements without departing from the spirit and principle of the present invention, and the modifications and replacements also fall into the protection scope covered by the claims.
Claims (8)
1. A periodic circulation flow lithium ion battery cooling system is characterized in that: including working medium runner (2) that encircle group battery (1) and arrange, be provided with the upset valve respectively around group battery (1), the size of upset valve equals with the bore of working medium runner (2), can correspond the flow direction of adjusting cooling medium on group battery (1) through adjusting the upset valve.
2. The periodic circulating flow lithium ion battery cooling system of claim 1, wherein: and a temperature sensor is arranged at each overturning valve and connected with a high-temperature alarm.
3. The periodically circulating flow lithium ion battery cooling system of claim 2, wherein: the temperature sensor and the turnover valve are both connected with a control system, and the control system controls the opening and closing of the turnover valve according to the collected temperature.
4. The periodically circulating flow lithium ion battery cooling system of claim 2, wherein: the temperature sensor is arranged on the wall surface of the working medium flow passage (2) at the inner side of the turnover valve.
5. The periodic circulating flow lithium ion battery cooling system of claim 1, wherein: the inlet of the working medium flow passage (2) is provided with a circulating pump (3), and the inlet and the outlet of the working medium flow passage (2) are separately arranged.
6. The periodic circulating flow lithium ion battery cooling system of claim 1, wherein: along working medium flow direction, the upset valve is including setting gradually first upset valve (4), third upset valve (6) fourth upset valve (7) and second upset valve (5) around group battery (1), first upset valve (4) and fourth upset valve (7) open simultaneously or close simultaneously, third upset valve (6) and second upset valve (5) open simultaneously or close simultaneously.
7. The cooling method of the cooling system of the lithium ion battery with periodic circulating flow according to claim 6, characterized in that the following two operation states are controlled in one cooling operation period:
the first working state: the first turnover valve (4) and the fourth turnover valve (7) are opened, the third turnover valve (6) and the second turnover valve (5) are closed, and a cooling working medium enters from the first turnover valve (4) and flows out from the fourth turnover valve (7);
the second working state: the first turnover valve (4) and the fourth turnover valve (7) are closed, the third turnover valve (6) and the second turnover valve (5) are opened, and the cooling working medium enters from the third turnover valve (6) and flows out from the second turnover valve (5).
8. The cooling method according to claim 7, characterized in that: the battery pack (1) is divided into four areas, and a first turnover valve (4), a second turnover valve (5), a third turnover valve (6) and a fourth turnover valve (7) are arranged corresponding to the first area, the second area, the third area and the fourth area of the battery pack (1); the first and second regions of the battery pack (1) are cooled in the first operating state, and the third and fourth regions of the battery pack (1) are cooled in the second operating state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011530126.1A CN112652837A (en) | 2020-12-22 | 2020-12-22 | Periodic circulating flow lithium ion battery cooling system and cooling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011530126.1A CN112652837A (en) | 2020-12-22 | 2020-12-22 | Periodic circulating flow lithium ion battery cooling system and cooling method |
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| CN112652837A true CN112652837A (en) | 2021-04-13 |
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| CN202011530126.1A Pending CN112652837A (en) | 2020-12-22 | 2020-12-22 | Periodic circulating flow lithium ion battery cooling system and cooling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224420A (en) * | 2021-04-25 | 2021-08-06 | 长安大学 | Reciprocating flow cooling system of normal-pressure lithium ion power battery and control method |
| DE102021204695A1 (en) | 2021-05-10 | 2022-11-10 | Robert Bosch Gesellschaft mit beschränkter Haftung | Housing for accommodating battery cells and electronic components |
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| CN206480734U (en) * | 2017-01-23 | 2017-09-08 | 北京新能源汽车股份有限公司 | Battery component and vehicle |
| CN110048185A (en) * | 2019-03-26 | 2019-07-23 | 开沃新能源汽车集团有限公司 | A kind of battery pouring-basket cooling system arragement construction with four-way valve |
| CN210607377U (en) * | 2019-10-12 | 2020-05-22 | 华南理工大学 | Power battery pack heat dissipation device with heat pipe device |
| CN211062826U (en) * | 2018-10-08 | 2020-07-21 | 三星Sdi株式会社 | Battery pack |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104471784A (en) * | 2012-05-17 | 2015-03-25 | 日立汽车系统株式会社 | Battery module |
| CN206480734U (en) * | 2017-01-23 | 2017-09-08 | 北京新能源汽车股份有限公司 | Battery component and vehicle |
| CN211062826U (en) * | 2018-10-08 | 2020-07-21 | 三星Sdi株式会社 | Battery pack |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224420A (en) * | 2021-04-25 | 2021-08-06 | 长安大学 | Reciprocating flow cooling system of normal-pressure lithium ion power battery and control method |
| CN113224420B (en) * | 2021-04-25 | 2023-02-10 | 长安大学 | Reciprocating flow cooling system of normal-pressure lithium ion power battery and control method |
| DE102021204695A1 (en) | 2021-05-10 | 2022-11-10 | Robert Bosch Gesellschaft mit beschränkter Haftung | Housing for accommodating battery cells and electronic components |
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Application publication date: 20210413 |
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