CN214254579U - Full-parallel uniform air distribution type battery pack heat management system - Google Patents

Full-parallel uniform air distribution type battery pack heat management system Download PDF

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CN214254579U
CN214254579U CN202023324150.8U CN202023324150U CN214254579U CN 214254579 U CN214254579 U CN 214254579U CN 202023324150 U CN202023324150 U CN 202023324150U CN 214254579 U CN214254579 U CN 214254579U
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air
battery
module
battery pack
baffle
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尹祥
白帆飞
刘洋
周阳
赵天宇
陈锦芳
刘春明
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Fo Ran Energy Group Co ltd
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Fo Ran Energy Group Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Abstract

The utility model relates to a full parallel even air distribution formula battery package thermal management system, this system include fan, battery package box, go into wind gap, air outlet, total air supply baffle, total induced air baffle, battery package air supply chamber, inside air supply baffle, inside induced air baffle, inside air supply passageway, inside induced air passageway, battery module, module box, battery monomer, module air supply baffle, module air supply chamber and monomer cooling channel. The system effectively avoids the phenomena of uneven air distribution and uneven upstream and downstream cooling of batteries at different positions in the conventional air-cooled battery pack heat management system by utilizing the special air chamber and air duct design, realizes the parallel and even cooling of a plurality of rows and a plurality of columns of battery modules in the battery pack, realizes the bilateral cooling of battery monomers, ensures the safety of the battery pack and prolongs the service life of the batteries.

Description

Full-parallel uniform air distribution type battery pack heat management system
Technical Field
The utility model relates to a battery package thermal management technical field, concretely relates to full parallel even air distribution formula battery package thermal management system.
Background
The lithium ion battery pack is an important component of the electric automobile, and a large number of lithium ion battery monomers in the battery pack are closely arranged together in series and parallel connection due to limited vehicle space. The battery generates a large amount of heat along with violent electrochemical reaction in the charging and discharging process, and heat accumulation and battery temperature rise in the battery pack can be caused if the heat dissipation is not timely carried out. The long-term high-temperature environment can reduce the cycle efficiency of the battery in the charging and discharging process and the service life of the battery, and can lead to thermal runaway in severe cases, thereby influencing the safety and reliability of the system. Therefore, in order to improve the performance of the whole vehicle, ensure the normal work of the battery pack and prolong the cycle life of the battery, a battery pack thermal management system is adopted to reduce the temperature of the battery and the temperature difference of the battery.
At present, liquid cooling and air cooling are mainly adopted for heat management of lithium ion battery packs for electric automobiles. Liquid cooling relies on liquid cooling medium, and cooperation metal liquid cold drawing, liquid cooling pipeline, liquid circulating pump etc. cool off the battery package, and for preventing the battery package short circuit that liquid leakage caused, cooling system leakproofness requires comparatively high, therefore liquid thermal management system structure is complicated, weight is big, the price is higher. The air cooling method is a heat dissipation method for reducing the temperature of the battery by taking low-temperature air as a medium, and natural wind or a fan is matched with a radiator of an automobile to reduce the temperature of the battery. Meanwhile, the air cooling system can effectively remove harmful gas possibly generated in the battery pack, and the safety is improved. The air cooling system has the advantages of simple structure, low price, convenience in maintenance and the like, and is widely applied to electric automobiles.
When the charge-discharge rate of the battery pack is low at normal temperature, the maximum temperature of the battery pack can be effectively reduced and the maximum temperature difference can be reduced by the conventional air-cooled heat management system. When the ambient temperature rises and the battery pack is in a quick charge-discharge working condition, the conventional air-cooled heat management system cannot meet the heat dissipation requirement of the battery pack, the highest temperature of the battery pack can exceed the upper limit, and the temperature difference between the single batteries and between the battery modules can be further increased. The air has small specific heat capacity, so that the temperature of the battery positioned at the upstream of the cooling air channel is obviously reduced after being cooled by the low-temperature air at the upstream, the temperature of the battery is gradually increased after the air absorbs the heat of the battery, and the battery positioned at the downstream of the air channel is cooled by the heated air, so that the cooling effect is poor and the temperature is high.
SUMMERY OF THE UTILITY MODEL
For solving among the conventional air-cooled battery package thermal management system different positions battery air distribution inhomogeneous, the inhomogeneous technical problem of upstream and downstream cooling, the utility model provides a following technical scheme:
a first object of the present invention is to provide a fully parallel uniform air distribution type battery pack thermal management system, which comprises a battery pack case, wherein the battery pack case is provided with an air inlet and an air outlet, a total air supply baffle is arranged at the lower end inside the battery pack case near the air inlet, and a total induced air baffle is arranged at the upper end inside the battery pack case near the air outlet; a plurality of rows and a plurality of columns of battery modules are arranged in the battery pack box body; the inner wall of the right side of the battery pack box body and the battery modules in the adjacent rows enclose to form a first clearance channel, the adjacent two rows of battery modules form a second clearance channel, and the inner wall of the left side of the battery pack box body and the battery modules in the adjacent rows enclose to form a third clearance channel; an internal air supply baffle is arranged in the first gap channel and the second gap channel, and an internal induced air baffle is arranged in the second gap channel and the third gap channel; the lower end face of the row of battery modules close to the air inlet, the main air supply baffle and the battery pack box body form a battery pack air supply chamber, and the upper end face of the row of battery modules close to the air outlet, the main air guide baffle and the battery pack box body form a battery pack air guide chamber; the internal air supply baffle, the right side surface of each row of battery modules and the battery pack box body are enclosed to form an internal air supply channel communicated with the battery pack air supply chamber, and the internal air inducing baffle, the left side surface of each row of battery modules and the battery pack box body are enclosed to form an internal air inducing channel communicated with the battery pack air inducing chamber; the battery module comprises a module box body, and a plurality of lithium ion battery single bodies which are arranged side by side at intervals are arranged in the module box body; the lower end of the module box body is connected with a module air supply baffle, and the upper end of the module box body is connected with a module induced draft baffle; the module air supply baffle, the module box body and the lower end face of the battery monomer enclose a module air supply chamber communicated with the internal air supply channel, and the upper side face of the module air guide baffle, the module box body and the battery monomer enclose a module air guide chamber communicated with the internal air supply channel; the inner wall of the left side of the module box body is adjacent to the battery monomer, the battery monomers are adjacent to the inner wall of the left side of the module box body, and a gap between the inner wall of the right side of the module box body and the battery monomers adjacent to the inner wall of the right side of the module box body forms a monomer cooling channel communicated with the module air supply chamber and the module air inducing chamber.
Preferably, the total air supply baffle and the lower end surface of the row of battery modules close to the air inlet form an included angle. The module air supply baffle and the lower end faces of the plurality of lithium ion battery monomers which are arranged side by side at intervals form an included angle. The internal air supply baffle and each row of the left side surface of the battery module are designed to form an included angle. And the included angle is an acute angle, and the design of the included angle in the acute angle shape can balance the air flow between the position close to the air inlet and the position far away from the air inlet.
Preferably, the total induced air baffle is parallel to the upper end face of the row of battery modules close to the air outlet. The module induced air baffle is parallel to the upper end faces of the plurality of lithium ion battery monomers which are arranged side by side at intervals. The total induced draft baffle and the module induced draft baffle are designed in parallel (namely, horizontal design) to ensure even air outlet and avoid influence on heat dissipation caused by local aggregation of air flow with heat in the battery pack.
Preferably, the lower end of the internal air supply baffle is connected to the inner wall of the right side of the battery pack case or the lower end of the internal induced air baffle, and the upper end of the internal air supply baffle is connected to the lower portion of the right side of the module case of the uppermost row of the battery modules. To ensure that the lowermost and uppermost rows of the battery modules in each row are also sufficiently cooled.
Preferably, the lower end of the internal induced draft baffle is connected to the lower portion of the left side of the module case of the battery module at the lowermost row, and the upper end of the internal induced draft baffle is connected to the upper portion of the right side of the module case of the battery module at the uppermost row. So as to prevent the air current with heat from being collected in the lowermost and uppermost rows of the battery modules in each row.
Preferably, the battery pack air supply device further comprises a fan, and an air inlet of the fan is aligned with the air inlet and communicated with the battery pack air supply chamber.
A second object of the present invention is to provide a method for operating a fully parallel uniform air distribution type battery pack thermal management system, the method comprising the steps of: the air enters the battery pack air supply chamber from the air inlet of the battery pack box under the drive of the fan, uniformly flows into the internal air supply channel under the action of the total air supply baffle, then uniformly enters each battery module on the left side under the action of the internal air supply baffle of the battery pack, uniformly enters the monomer cooling channels of each battery monomer under the action of the module air supply baffle after entering the module air supply chamber to cool the monomer batteries, then flows into the module air induction chamber, flows into the internal air induction channel under the action of the module air induction baffle, then the air in the internal air induction channel is collected in the battery pack air induction chamber, and leaves the battery pack through the air outlet of the battery pack box under the action of the total air induction baffle.
Compared with the prior art, the utility model has the advantages of: in the fully-parallel uniform air distribution type lithium ion battery pack heat management system, under the action of a total air supply baffle and each internal air supply baffle of a battery pack, the cooling air flow of each internal air supply channel in the battery pack is similar; under the action of the internal air supply baffle and the row of module air supply baffles, the flow of cooling air of the row of module air supply chambers is similar; under the action of each module air supply baffle and the corresponding module induced air baffle, the flow of cooling air in each battery monomer cooling channel in the module is similar, so that each battery module in the battery pack and each battery monomer in the battery module can be cooled by the air with similar flow in the air cooling process, and the inconsistency of temperature fields among the battery modules and among the battery monomers caused by uneven flow of the cooling air is reduced; and all battery monomers in the battery pack do not have an upstream-downstream relationship, so that the temperature inconsistency between the battery modules and between the battery monomers caused by different upstream and downstream cooling air temperatures in a common air-cooled battery thermal management system is avoided. The phenomena of uneven air distribution and uneven upstream and downstream cooling of batteries at different positions in a conventional air-cooled battery pack heat management system are effectively avoided by utilizing the special air chamber and air duct design, the heat dissipation effect is improved to the maximum extent, the temperature of a battery pack is reduced, the temperature difference between the single batteries and between the battery modules is reduced, the parallel and even cooling of multiple rows and multiple columns of battery modules in the battery pack is realized, the double-side cooling of the battery single batteries is realized, the safety of the battery pack is ensured, and the service life of the batteries is prolonged. Meanwhile, the structure is simplified and the maintenance is convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of the management system;
fig. 2 is a schematic structural view of the battery module.
Wherein: 1. a fan; 2. a battery pack case; 3. an air inlet; 4. an air outlet; 5. a total air supply baffle; 6. a total induced draft baffle; 7. the battery pack air supply chamber; 8. a battery pack air induction chamber; 9. an internal air supply baffle; 10. an internal induced draft baffle; 11. an internal air supply channel; 12. an internal induced draft channel; 13. a battery module; 14. a module box body; 15. a battery cell; 16. a module air supply baffle; 17. a module induced draft baffle; 18. a module air supply chamber; 19. a module air induction chamber; 20. a monomer cooling channel; 21. a first clearance channel; 22. a second gap channel; 23. a third interstitial channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Embodiments of the present invention will be described below with reference to the accompanying drawings:
as shown in fig. 1-2, a fully-parallel uniform air distribution type battery pack thermal management system is provided, which includes a fan 1 and a battery pack case 2, wherein the battery pack case 2 is provided with an air inlet 3 and an air outlet 4, a total air supply baffle 5 is arranged at the lower end of the interior of the battery pack case 2 near the air inlet 3, and a total induced air baffle 6 is arranged at the upper end of the interior of the battery pack case 2 near the air outlet 4;
a plurality of rows and a plurality of columns (such as 6 multiplied by 6) of battery modules 13 are arranged in the battery pack box body 2; the right inner wall of the battery pack case 2 and the adjacent battery modules 13 enclose a first clearance channel 21, the adjacent two rows of battery modules 13 form a second clearance channel 22, and the left inner wall of the battery pack case 2 and the adjacent rows of battery modules 13 enclose a third clearance channel 23.
An internal air supply baffle 9 is arranged in the first gap channel 21 and the second gap channel 22, and an internal induced air baffle 10 is arranged in the second gap channel 22 and the third gap channel 23; in order to ensure that the battery modules 13 in the lowermost row and the uppermost row in each row are also sufficiently cooled, the lower end of the internal air supply baffle 9 is connected to the right inner wall of the battery pack case 2 or the lower end of the internal air inducing baffle 10, and the upper end of the internal air supply baffle 9 is connected to the right lower portion of the module case 14 of the battery module 13 in the uppermost row. Meanwhile, in order to prevent the air flow with heat from being collected in the lowermost and uppermost rows of the battery modules 13 in each row, the lower end of the internal air inducing baffle 10 is connected to the lower portion of the left side of the module case 14 of the lowermost battery module 13, and the upper end of the internal air inducing baffle 10 is connected to the upper portion of the right side of the module case 14 of the uppermost battery module 13.
The lower end face of the row of battery modules 13 close to the air inlet 3, the total air supply baffle 5 and the battery pack box body 2 form a battery pack air supply chamber 7, and the upper end face of the row of battery modules 13 close to the air outlet 4, the total air inducing baffle 6 and the battery pack box body 2 form a battery pack air inducing chamber 8; the air inlet of the fan 1 is aligned to the air inlet 3 and communicated with the battery pack air supply chamber 7; the internal air supply baffle 9, the right side surface of each row of battery modules 13 and the battery pack box body 2 enclose an internal air supply channel 11 communicated with the battery pack air supply chamber 7, and the internal air inducing baffle 10, the left side surface of each row of battery modules 13 and the battery pack box body 2 enclose an internal air inducing channel 12 communicated with the battery pack air inducing chamber 8.
The battery module 13 comprises a module box 14, wherein a plurality of (for example, 15) lithium ion battery cells 15 are arranged in the module box 14 at intervals; the lower end of the module box body 14 is connected with a module air supply baffle 16, and the upper end is connected with a module induced draft baffle 17; a module air supply chamber 18 communicated with the internal air supply channel 11 is enclosed by the lower end surfaces of the module air supply baffle 16, the module box body 14 and the battery monomer 15, and a module air induction chamber 19 communicated with the internal air supply channel 11 is enclosed by the upper side surfaces of the module air induction baffle 17, the module box body 14 and the battery monomer 15; the inner wall of the left side of the module case 14 and the adjacent battery cell 15, the adjacent two battery cells 15, and the gap between the inner wall of the right side of the module case 14 and the adjacent battery cell 15 form a cell cooling channel 20 communicated with the module air supply chamber 18 and the module air induction chamber 19.
The total air supply baffle 5 and the lower end face of a row of battery modules 13 close to the air inlet 3, the module air supply baffle 16 and the lower end faces of a plurality of lithium ion battery monomers 15 arranged side by side at intervals, the internal air supply baffle 9 and the left side face of each row of battery modules 13 are all designed to be acute angles capable of balancing air flow between positions close to the air inlet 3 and far away from the air inlet 3.
The total induced air baffle 6 and the upper end face of a row of battery modules 13 close to the air outlet 4, the module induced air baffle 17 and the upper end faces of a plurality of lithium ion battery monomers 15 which are arranged side by side at intervals are all in order to ensure even air outlet, and the parallel design (namely horizontal design) that the heat dissipation is influenced by local aggregation of heat airflow in the battery pack is avoided.
The working process is as follows: air enters the battery pack air supply chamber 7 from the air inlet 3 of the battery pack box body 2 under the drive of the fan 1, uniformly flows into the internal air supply channel 11 under the action of the main air supply baffle 5, then uniformly enters each battery module 13 on the left side under the action of the battery pack internal air supply baffle 9, enters the module air supply chamber 18, uniformly enters the monomer cooling channel 20 of each battery monomer 15 under the action of the module air supply baffle 16 to cool the battery monomer, then flows into the module air guide chamber 19, flows into the internal air guide channel 12 under the action of the module air guide baffle 17, then the air in the internal air guide channel 12 is collected in the battery pack air guide chamber 8, and leaves the battery pack through the air outlet 4 of the battery pack box body 2 under the action of the main air guide baffle 6.
The beneficial effects of the utility model reside in that: in the fully-parallel uniform air distribution type lithium ion battery pack heat management system, under the action of a total air supply baffle 5 and each internal air supply baffle 9 of a battery pack, the cooling air flow of each internal air supply channel 11 in the battery pack is similar; under the action of the internal air supply baffle 9 and each module air supply baffle 16 of the row, the cooling air flow of each module air supply chamber 18 of the row is similar; under the action of each module air supply baffle 16 and the corresponding module induced air baffle 17, the flow of cooling air in the cooling channel of each battery monomer 15 in the module is similar, so that each battery module 13 in the battery pack and each battery monomer 15 in the battery module 13 can be cooled by the air with similar flow in the air cooling process, and the inconsistency of temperature fields among the battery modules 13 and among the battery monomers 15 caused by uneven flow of the cooling air is reduced; and all the battery monomers 15 in the battery pack do not have the upstream and downstream relation, so that the temperature inconsistency between the battery modules 13 and between the battery monomers 15 caused by different upstream and downstream cooling air temperatures in a common air-cooled battery thermal management system is avoided. The phenomena of uneven air distribution and uneven upstream and downstream cooling of batteries at different positions in a conventional air-cooled battery pack heat management system are effectively avoided by utilizing the special air chamber and air duct design, the heat dissipation effect is improved to the maximum extent, the temperature of the battery pack is reduced, the temperature difference between the single batteries and between the battery modules 13 is reduced, the parallel and even cooling of multiple rows and multiple columns of battery modules 13 in the battery pack is realized, the double-side cooling of the battery single batteries 15 is realized, the safety of the battery pack is ensured, and the service life of the battery is prolonged. Meanwhile, the structure is simplified and the maintenance is convenient.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A full-parallel uniform air distribution type battery pack heat management system comprises a battery pack box body and is characterized in that the battery pack box body is provided with an air inlet and an air outlet, a total air supply baffle is arranged at the lower end of the interior of the battery pack box body close to the air inlet, and a total induced air baffle is arranged at the upper end of the interior of the battery pack box body close to the air outlet; a plurality of rows and a plurality of columns of battery modules are arranged in the battery pack box body; the inner wall of the right side of the battery pack box body and the battery modules in the adjacent rows enclose to form a first clearance channel, the adjacent two rows of battery modules form a second clearance channel, and the inner wall of the left side of the battery pack box body and the battery modules in the adjacent rows enclose to form a third clearance channel; an internal air supply baffle is arranged in the first gap channel and the second gap channel, and an internal induced air baffle is arranged in the second gap channel and the third gap channel; the lower end face of the row of battery modules close to the air inlet, the main air supply baffle and the battery pack box body form a battery pack air supply chamber, and the upper end face of the row of battery modules close to the air outlet, the main air guide baffle and the battery pack box body form a battery pack air guide chamber; the internal air supply baffle, the right side surface of each row of battery modules and the battery pack box body are enclosed to form an internal air supply channel communicated with the battery pack air supply chamber, and the internal air inducing baffle, the left side surface of each row of battery modules and the battery pack box body are enclosed to form an internal air inducing channel communicated with the battery pack air inducing chamber; the battery module comprises a module box body, and a plurality of lithium ion battery single bodies which are arranged side by side at intervals are arranged in the module box body; the lower end of the module box body is connected with a module air supply baffle, and the upper end of the module box body is connected with a module induced draft baffle; the module air supply baffle, the module box body and the lower end face of the battery monomer enclose a module air supply chamber communicated with the internal air supply channel, and the upper side face of the module air guide baffle, the module box body and the battery monomer enclose a module air guide chamber communicated with the internal air supply channel; the inner wall of the left side of the module box body is adjacent to the battery monomer, the battery monomers are adjacent to the inner wall of the left side of the module box body, and a gap between the inner wall of the right side of the module box body and the battery monomers adjacent to the inner wall of the right side of the module box body forms a monomer cooling channel communicated with the module air supply chamber and the module air inducing chamber.
2. The system according to claim 1, wherein the total air supply baffle is disposed at an angle to the lower end of the row of battery modules adjacent to the air inlet.
3. The all-parallel uniform air distribution type battery pack thermal management system according to claim 1, wherein the module air supply baffle is designed to form an included angle with the lower end surfaces of the plurality of lithium ion battery cells which are spaced side by side.
4. The system according to claim 1, wherein the internal air supply baffle is disposed at an angle to the left side of each row of the battery modules.
5. The all parallel uniform air distribution battery pack thermal management system of any of claims 2-4, wherein the included angle is an acute angle.
6. The all-parallel uniform air distribution type battery pack heat management system according to claim 1, wherein the total induced air baffle is parallel to the upper end face of the row of battery modules near the air outlet.
7. The all-parallel uniform air distribution type battery pack thermal management system according to claim 1, wherein the module induced air baffle is parallel to the upper end faces of the plurality of lithium ion battery cells which are spaced side by side.
8. The system according to claim 1, wherein the lower end of the internal air supply baffle is connected to the inner wall of the right side of the battery pack case or the lower end of the internal air inducing baffle, and the upper end of the internal air supply baffle is connected to the lower portion of the right side of the module case of the battery module in the uppermost row.
9. The all-parallel uniform air distribution type battery pack thermal management system according to claim 1, wherein the lower end of the internal air inducing baffle is connected to the lower left side of the module case of the lowermost battery module, and the upper end of the internal air inducing baffle is connected to the upper right side of the module case of the uppermost battery module.
10. The system according to claim 1, further comprising a blower having an inlet aligned with the inlet and communicating with the battery pack plenum.
CN202023324150.8U 2020-12-31 2020-12-31 Full-parallel uniform air distribution type battery pack heat management system Active CN214254579U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112701395A (en) * 2020-12-31 2021-04-23 佛燃能源集团股份有限公司 Full-parallel uniform air distribution type battery pack heat management system and operation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112701395A (en) * 2020-12-31 2021-04-23 佛燃能源集团股份有限公司 Full-parallel uniform air distribution type battery pack heat management system and operation method thereof
CN112701395B (en) * 2020-12-31 2024-05-28 佛燃能源集团股份有限公司 Full-parallel uniform air distribution type battery pack thermal management system and operation method thereof

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