CN220306354U - Battery pack lower box body and battery pack - Google Patents
Battery pack lower box body and battery pack Download PDFInfo
- Publication number
- CN220306354U CN220306354U CN202321928828.4U CN202321928828U CN220306354U CN 220306354 U CN220306354 U CN 220306354U CN 202321928828 U CN202321928828 U CN 202321928828U CN 220306354 U CN220306354 U CN 220306354U
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- Prior art keywords
- channel
- bottom plate
- battery pack
- lower box
- lower case
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- 238000001816 cooling Methods 0.000 claims abstract description 35
- 230000000903 blocking effect Effects 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000000110 cooling liquid Substances 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims description 22
- 239000003507 refrigerant Substances 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 2
- 230000005764 inhibitory process Effects 0.000 abstract description 3
- 230000035484 reaction time Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 13
- 239000000376 reactant Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 4
- 230000009194 climbing Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- QYSGYZVSCZSLHT-UHFFFAOYSA-N octafluoropropane Chemical compound FC(F)(F)C(F)(F)C(F)(F)F QYSGYZVSCZSLHT-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229960004065 perflutren Drugs 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The application belongs to the technical field of battery packs and provides a battery pack lower box body and a battery pack, and mainly comprises a lower box body bottom plate, wherein a first channel and a second channel are arranged in the lower box body bottom plate, and the first channel and the second channel are mutually independent; the first channel is communicated with a cooling liquid supply system; a first through hole is formed between the second channel and the inner side of the bottom plate of the lower box body, a first blocking piece is arranged in the first through hole, and a fire extinguishing agent is arranged in the second channel. According to the scheme, the first channel and the second channel are arranged in the lower box bottom plate, and the first channel is communicated with the cooling liquid supply system, so that the lower box bottom plate can have the cooling and heat exchanging functions, and the space utilization rate of the battery pack in the height direction is improved; meanwhile, the fire extinguishing agent is arranged in the second channel, so that the fire extinguishing agent can participate in the inhibition and the extinguishing of the heat source earlier when the thermal runaway phenomenon occurs, more reaction time can be strived for, and the application safety is improved.
Description
Technical Field
The application belongs to the technical field of battery packs, and particularly relates to a battery pack lower box body and a battery pack.
Background
At present, the lower box body of the battery pack is mainly used for providing a storage space of an electric core or an electric core module, plays a role in supporting at the same time, and has a relatively single function. The cooling of the module is usually to set a cold plate at the bottom or top of the module, and the cooling liquid in the cold plate circulates to realize contact heat exchange cooling with the end face of the module. However, in the mode, the contact area between the cold plate and the module is small, and meanwhile, the heat exchange effect is limited by the circulation of cooling liquid to a great extent, and particularly, the heat exchange effect is poor when the stacked working conditions such as high-speed climbing and high-power quick charging are dealt with.
Disclosure of Invention
In order to overcome at least one of the above drawbacks of the prior art, an object of the present application is to provide a battery pack lower case and a battery pack.
The technical means adopted for solving the technical problems are as follows:
the application provides a battery pack lower box body, which comprises a lower box body bottom plate, wherein a first channel and a second channel are arranged in the lower box body bottom plate, and the first channel and the second channel are mutually independent;
the first channel is communicated with a cooling liquid supply system;
a first through hole is formed between the second channel and the inner side of the bottom plate of the lower box body, a first blocking piece is arranged in the first through hole, and a fire extinguishing agent is arranged in the second channel.
Preferably, the first channel is arranged in the lower box bottom plate in a winding way, and the second channel is at least partially arranged in the winding range of the first channel.
In the above preferred scheme, the first channel is arranged in a winding manner, so that the path length and the coverage area of the first channel can be increased, and the heat exchange effect is improved; meanwhile, the second channel is arranged in the winding range of the first channel, so that the storage state of the fire extinguishing agent can be ensured conveniently, and the fire extinguishing agent is more reliable to use.
Preferably, a third channel is further arranged in the bottom plate of the lower box body, and the third channel, the first channel and the second channel are mutually independent;
the third channel is communicated with an air conditioner refrigerant supply system.
In the above preferred scheme, the third channel can form a double cooling channel with the first channel, at this time, cooling liquid is introduced into the first channel, and air-conditioning refrigerants can be introduced into the third channel, so that cooling operation under superposition working conditions such as high-speed climbing and high-power rapid charging can be better handled, and the thermal management effect can be better.
Preferably, the third channel is arranged in the lower box bottom plate in a winding way, and the first channel is at least partially arranged in the winding range of the third channel.
In the above preferred solution, the third channel is set in a winding manner, so that the path length and the coverage area of the third channel can be increased, and the heat exchange effect is improved; meanwhile, the first channel is arranged in the winding range of the third channel, so that the cooling liquid can be conveniently subjected to heat exchange and cooling through an air conditioner refrigerant.
Preferably, the coverage area of the first channel on the lower box bottom plate is larger than the coverage area of the third channel on the lower box bottom plate.
In the above preferred solution, the coverage area of the first channel is set to be larger than the coverage area of the third channel, so that the actual application situation of the battery pack can be better adapted, for example, the operation time of the battery pack under the conventional working condition is longer, and at this time, the heat exchange and cooling operation can be performed only through the first channel.
Preferably, the first channel and the third channel form a lateral enclosure for the second channel.
In the above preferred scheme, the first channel and the third channel form a lateral surrounding of the second channel, and the second channel, the first channel and the third channel are in a layer-by-layer winding mode, so that the overall heat exchange effect and the temperature uniformity are better.
Preferably, the cooling device further comprises a plurality of cooling plates, wherein the cooling plates are internally provided with a first pipeline and a second pipeline which are mutually independent;
the cooling plate is connected with the bottom plate of the lower box body in a plugging manner, the first pipeline is communicated with the first channel, and the second pipeline is communicated with the third channel;
and a containing space for installing the power supply core is formed between the two cooling plates.
In the above preferred scheme, through the cooling plate, thermal interaction with the battery core can be realized at the large side of the battery core, so that the contact area between the cooling system and the battery core during thermal interaction can be effectively increased, and the thermal management effect is further improved.
Preferably, a second through hole is arranged between the second channel and the outer side of the bottom plate of the lower box body, and a second blocking piece is arranged in the second through hole.
In the above preferred solution, the second blocking member may block the second channel from the outer side of the bottom plate of the lower case; meanwhile, when the thermal runaway phenomenon occurs, the thermal runaway reaction breaks through the second barrier, and at the moment, the downward discharge of the thermal reactant can be carried out through the second through holes, so that the use is safer.
There is also provided a battery pack in which the battery pack lower case as described above is provided.
Preferably, the anti-explosion device comprises a plurality of electric cores, wherein the anti-explosion valves of the electric cores are arranged opposite to the first blocking piece.
In the above preferred scheme, the explosion-proof valve of the battery core is arranged to be opposite to the first blocking member, so that when the explosion-proof valve of the battery core is exploded, the thermal reactant can directly break through the first blocking member, and then fire extinguishing operation is performed through the fire extinguishing agent in the second channel, and the reaction can be quicker.
Compared with the prior art, the application has the following beneficial effects:
in the scheme, the first channel and the second channel are arranged in the lower box bottom plate, and the first channel is communicated with the cooling liquid supply system, so that the lower box bottom plate can have the cooling and heat exchanging functions, and the space utilization rate of the battery pack in the height direction is improved; meanwhile, the fire extinguishing agent is arranged in the second channel, so that the fire extinguishing agent can participate in the inhibition and the extinguishing of the heat source earlier when the thermal runaway phenomenon occurs, more reaction time can be strived for, and the application safety is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional view of a bottom plate of a lower case of the present application.
Fig. 2 is a schematic view of the installation of the cooling plate of the present application on the bottom plate of the lower case.
Fig. 3 is a schematic cross-sectional view of the cooling plate of the present application.
Fig. 4 is a schematic cross-sectional view of the first through hole of the present application.
Fig. 5 is a schematic structural view of the battery pack of the present application.
Marking:
1-a lower box bottom plate, 11-a first channel, 12-a second channel, 121-an injection port, 13-a third channel, 14-a first through hole and 15-a second through hole;
2-cooling plate, 21-first conduit, 22-second conduit.
Detailed Description
In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. In addition, embodiments of the present application and features of the embodiments may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, and the described embodiments are merely some, rather than all, embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.
It should be noted that: unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-5, the embodiment provides a lower case of a battery pack, which comprises a lower case bottom plate 1, wherein a first channel 11 and a second channel 12 are arranged in the lower case bottom plate 1, and the first channel 11 and the second channel 12 are mutually independent.
Wherein the first channel 11 may be used for communication with a cooling liquid supply system; for example, the lower case bottom plate 1 is provided with a liquid inlet and a liquid outlet which are communicated with the first channel 11, and the liquid inlet and the liquid outlet are communicated with a loop of a cooling liquid supply system, so that the supply and the circulation of the cooling liquid are realized.
The second channel 12 may be used for storing fire extinguishing agent, where the fire extinguishing agent may be a compound agent such as perfluoropropane, and the like, and is required to be cooled and to block oxygen. As an example of application, an injection port 121 communicating with the second passage 12 may be provided in the lower case bottom plate 1, and a fire extinguishing agent may be injected into the second passage 12 through the injection port 121, and then the injection port 121 may be sealed.
In some embodiments, a first through hole 14 is provided between the second channel 12 and the inner side of the lower case bottom plate 1, where the inner side is referred to herein as the side of the lower case bottom plate 1 provided with the battery cell or the module; a second through hole 15 is provided between the second channel 12 and the outside of the lower case bottom plate 1. A first blocking member is provided in the first through hole 14 and a second blocking member is provided in the second through hole 15.
As an application example, the first blocking member and the second blocking member may be in the form of stress marks, and when the applied pressure reaches a preset threshold value, the first blocking member and the second blocking member may be broken.
As an application example, the first blocking member and the second blocking member may be made of a metal material with a low melting point, and when the temperature reaches a preset threshold, the first blocking member and the second blocking member may be melted through.
Through the first blocking member, when thermal runaway or explosion and pressure relief of the battery core occur at the inner side of the lower box body of the battery pack, the thermal reactant acts on the first blocking member, and at this time, the first through hole 14 is in a communicating state, so that the fire extinguishing agent in the second channel 12 can inhibit and extinguish the heat source. By the second blocking member, when the thermal reactant acts on the second blocking member, the second through holes 15 are in a communication state, and the thermal reactant can be discharged from the second through holes 15 to the outside, and is in a downward discharge form, so that the thermal reactant is safer and more reliable to use.
In some embodiments, as shown in fig. 1, the first channel 11 is disposed in a winding manner in the lower case bottom plate 1, and the second channel 12 is disposed at least partially within the winding range of the first channel 11. The first channel 11 is arranged in a winding mode, so that the path length and the coverage area of the first channel 11 can be increased, and the heat exchange effect is improved; meanwhile, the second channel 12 is arranged in the winding range of the first channel 11, so that the storage state of the fire extinguishing agent can be ensured, and the fire extinguishing agent is more reliable to use.
In some embodiments, as shown in fig. 1, a third channel 13 is further disposed in the lower case bottom plate 1, and the third channel 13 is disposed independent of the first channel 11 and the second channel 12. The third channel 13 may be used to communicate with an air conditioning coolant supply system, so as to form a dual cooling channel with the first channel 11, at this time, cooling liquid is introduced into the first channel 11, and air conditioning coolant may be introduced into the third channel 13, so that cooling operations under stacked working conditions such as high-speed climbing and high-power fast charging may be better handled, and a thermal management effect may be better.
In some embodiments, the third channel 13 is also disposed in the lower case bottom plate 1 in a winding manner, and the first channel 11 is at least partially disposed in the winding range of the third channel 13. The third channel 13 is arranged in a winding mode, so that the path length and the coverage area of the third channel 13 can be increased, and the heat exchange effect is improved; meanwhile, the first channel 11 is arranged in the winding range of the third channel 13, so that the cooling liquid can be conveniently cooled by heat exchange through an air conditioning refrigerant.
In some embodiments, the first channel 11 and the third channel 13 form a lateral enclosure for the second channel 12. The first channel 11 and the third channel 13 form a lateral surrounding of the second channel 12, as shown in fig. 1, and the second channel 12, the first channel 11 and the third channel 13 are in a layer-by-layer winding form, so that the overall heat exchange effect and the temperature uniformity are better.
In addition, as an application example, as shown in fig. 1, the coverage area of the first channel 11 on the lower case bottom plate 1 is larger than the coverage area of the third channel 13 on the lower case bottom plate 1, and the coverage area of the first channel 11 is set to be larger than the coverage area of the third channel 13, so that the actual application situation of the battery pack, for example, the operation time of the battery pack under the normal working condition is longer, and the heat exchange cooling operation can be performed only through the first channel 11.
In some embodiments, the lower case bottom plate 1 is further provided with a plurality of cooling plates 2, and a receiving space for mounting power supply is formed between two cooling plates 2. Wherein a first pipeline 21 and a second pipeline 22 which are mutually independent are arranged in the cooling plate 2; the cooling plate 2 is in plug connection with the lower box bottom plate 1, and when the cooling plate 2 is in plug connection with the lower box bottom plate 1, the first pipeline 21 is communicated with the first channel 11, and the second pipeline 22 is communicated with the third channel 13, as shown in fig. 3. Through the cooling plate 2, thermal interaction with the battery cell can be realized at the large side of the battery cell, so that the contact area between a cooling system and the battery cell during thermal interaction can be effectively increased, and the thermal management effect is further improved.
In addition, the embodiment also provides a battery pack, wherein the battery pack lower box body and a plurality of battery cells are arranged. Meanwhile, the explosion-proof valve of the battery core is arranged opposite to the first blocking piece. The explosion-proof valve of the battery core is arranged to be opposite to the first blocking piece, so that when the explosion-proof valve of the battery core is exploded, a thermal reactant can directly break through the first blocking piece and then perform fire extinguishing operation through the fire extinguishing agent in the second channel 12, and the reaction can be quicker.
Compared with the prior art, the scheme of the embodiment has the following beneficial effects:
in this scheme be provided with first passageway 11 and second passageway 12 in lower box bottom plate 1, first passageway 11 and coolant liquid supply system intercommunication, thereby make lower box bottom plate 1 can have the function of cooling heat transfer concurrently, improves the space utilization in the battery package direction of height.
Meanwhile, the fire extinguishing agent is arranged in the second channel 12, so that the fire extinguishing agent can participate in the inhibition and the extinguishing of the heat source earlier when the thermal runaway phenomenon occurs, more reaction time can be strived for, and the application safety is improved.
And, still be provided with third passageway 13 to can be in down box bottom plate 1 with form the heat transfer cooling circuit of two cold sources formula between the cooling plate 2, in order to deal with the application under the stack operating mode such as high-speed climbing and high-power quick charge better, holistic thermal management effect is better.
The foregoing is merely a specific embodiment of the present application and is not intended to limit the scope of the present application, and various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. Variations and substitutions will be readily apparent to those skilled in the art within the scope of the present disclosure, and are intended to be included within the scope of the present disclosure. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. The battery pack lower box body is characterized by comprising a lower box body bottom plate, wherein a first channel and a second channel are arranged in the lower box body bottom plate, and the first channel and the second channel are mutually independent;
the first channel is communicated with a cooling liquid supply system;
a first through hole is formed between the second channel and the inner side of the bottom plate of the lower box body, a first blocking piece is arranged in the first through hole, and a fire extinguishing agent is arranged in the second channel.
2. The battery pack lower case of claim 1, wherein the first channel is disposed in a winding manner in the lower case bottom plate, and the second channel is at least partially disposed in a winding range of the first channel.
3. The battery pack lower box according to claim 1 or 2, wherein a third channel is further arranged in the lower box bottom plate, and the third channel, the first channel and the second channel are mutually independent;
the third channel is communicated with an air conditioner refrigerant supply system.
4. The battery pack lower case of claim 3, wherein the third channel is provided in the lower case bottom plate in a winding manner, and the first channel is at least partially provided in a winding range of the third channel.
5. The battery pack lower case of claim 4, wherein a coverage area of the first channel on the lower case bottom plate is larger than a coverage area of the third channel on the lower case bottom plate.
6. The battery under-pack case according to claim 5, wherein the first channel and the third channel form a lateral enclosure for the second channel.
7. The battery pack lower case according to any one of claims 4 to 6, further comprising a plurality of cooling plates, wherein the cooling plates are provided with first and second pipes independent from each other therein;
the cooling plate is connected with the bottom plate of the lower box body in a plugging manner, the first pipeline is communicated with the first channel, and the second pipeline is communicated with the third channel;
and a containing space for installing the power supply core is formed between the two cooling plates.
8. The battery pack lower case according to claim 7, wherein a second through hole is provided between the second passage and the outer side of the lower case bottom plate, and a second blocking member is provided in the second through hole.
9. A battery pack, characterized in that a battery pack lower case according to any one of the preceding claims 1 to 8 is provided therein.
10. The battery pack of claim 9, comprising a plurality of cells, wherein the explosion-proof valve of the cells is disposed opposite the first barrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321928828.4U CN220306354U (en) | 2023-07-20 | 2023-07-20 | Battery pack lower box body and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321928828.4U CN220306354U (en) | 2023-07-20 | 2023-07-20 | Battery pack lower box body and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220306354U true CN220306354U (en) | 2024-01-05 |
Family
ID=89374774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321928828.4U Active CN220306354U (en) | 2023-07-20 | 2023-07-20 | Battery pack lower box body and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220306354U (en) |
-
2023
- 2023-07-20 CN CN202321928828.4U patent/CN220306354U/en active Active
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