CN222190913U - A battery pack - Google Patents
A battery pack Download PDFInfo
- Publication number
- CN222190913U CN222190913U CN202420630729.6U CN202420630729U CN222190913U CN 222190913 U CN222190913 U CN 222190913U CN 202420630729 U CN202420630729 U CN 202420630729U CN 222190913 U CN222190913 U CN 222190913U
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- CN
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- Prior art keywords
- battery
- battery pack
- cooling
- cells
- cell
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- 238000001816 cooling Methods 0.000 claims abstract description 72
- 239000006260 foam Substances 0.000 claims description 10
- 239000002826 coolant Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 8
- 239000000178 monomer Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003466 welding 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
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- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a battery pack, which belongs to the technical field of battery packs and comprises a cooling part, an electric element and a first battery pack, wherein the first battery pack comprises a plurality of first battery cells, the first battery cells are of three-direction sizes and stacked in a first direction, the cooling part is at least abutted against the outside of the side face of the first battery cell in the first battery pack in a second direction, and the electric element is at least arranged outside the top face of the first battery cell in the first battery pack in a third direction. The double-row battery pack structure is formed by arranging the cooling plates on the two sides of the battery cells, so that the cooling contact area is increased, the heat dissipation efficiency is improved, the double-row battery pack structure is formed by connecting the bottoms of the first battery cells and the second battery cells, the grouping mode is optimized, and the energy density of the battery pack is further improved.
Description
Technical Field
The utility model relates to the technical field of battery packs, in particular to a battery pack.
Background
The battery pack is widely used as an energy storage device in electric vehicles and hybrid vehicles. Battery packs are used to store and provide electrical energy, but due to their large amount of energy storage and release processes, a large amount of heat is generated, which can have a certain impact on the life and performance of the battery pack. Therefore, heat dissipation of the power cell is particularly important. Along with the rapid development of new energy industry, in the field of small power batteries, the requirements on the endurance energy density and the thermal management capability of the small power battery pack are higher and higher, and the requirements of the small power battery pack on quick charge are also increased.
In the prior art, most common battery design modes are single-row battery module box packing or double-row module box packing modes are adopted for improving the energy density of the battery pack. After the battery module is put into the box, in order to improve the thermal management capability of the battery pack, a cooling plate is usually designed at the bottom of the box body to be contacted with the bottom of the battery cell so as to achieve the purpose of heat dissipation. For example, chinese patent with document number CN219226448U discloses a double-row large module battery pack, the box of the battery pack is composed of a box bottom plate and a box cover covered on the box bottom plate, an integrated liquid cooling pipeline is arranged in the box bottom plate, a plurality of double-row battery modules are sequentially arranged from one end to the other end in the box, a BMS bracket is arranged between adjacent double-row battery modules, a panel mounting window is arranged on the end wall of one end of the box cover, an electric appliance panel is arranged on the panel mounting window, and the electric appliance panel is connected with the adjacent double-row battery modules in the box through copper bars for controlling the double-row battery modules. The double-row large module with higher integration level is used in the scheme, the strength is improved relative to two single modules, and materials are saved. However, the problem of this scheme is that the cooling plate of this battery module can only cool off the electric core from the bottom surface of electric core, and this cooling method cooling efficiency is lower, is difficult to satisfy the quick even demand of cooling of electric core.
In addition, small power battery packs currently widely used in two-wheeled vehicles are prone to fire during charging, and are prone to serious casualties and property loss. With the increase of the productivity and the decrease of the cost in the power battery industry, the battery cells above the vehicle standard level are also possible to be applied to two-wheel vehicles as small power battery packs, but no mature product design exists at present.
Disclosure of utility model
The utility model provides a battery pack aiming at the problems of the prior art, and aims to solve the problems of low heat dissipation efficiency and poor heat dissipation effect of the existing battery module. In order to achieve the above purpose, the present utility model provides the following technical solutions:
a battery pack comprises a cooling part, an electric element and a first battery pack, wherein the first battery pack comprises a plurality of first battery cells, the first battery cells are of three-direction sizes and stacked in a first direction, the cooling part is at least abutted against the outside of the side face of the first battery cells in the first battery pack in a second direction, and the electric element is at least arranged outside the top face of the first battery cells in the first battery pack in the third direction.
The battery pack comprises a first battery pack, a second battery pack and a cooling component, wherein the first battery pack comprises a plurality of first battery cells, the first battery cells are stacked in the first direction, the second battery cells comprise a plurality of second battery cells, the second battery cells have three dimensions in the first direction and are stacked in the first direction, and the second battery cells in the second battery pack and the first battery cells in the first battery pack are stacked in the third direction, so that the cooling component is abutted against the outside of the side surfaces of the first battery cells and the second battery cells in the second direction.
Further, the top surfaces of the first battery unit and the second battery unit face opposite to each other, and the electric element is arranged at least outside the top surface of the second battery unit in the second battery pack in the third direction.
Further, in the third direction, the top surface of the first battery cell and the top surface of the second battery cell are far away from each other, and the bottom surface of the first battery cell and the bottom surface of the second battery cell are close to each other.
The cooling component is internally provided with a cooling flow passage for flowing in and out of the cooling agent from the inflow port, the cooling flow passage comprises a first flow passage and a second flow passage, the first flow passage is a circular flow passage, the second flow passage is an S-shaped flow passage, and the inflow port, the first flow passage, the second flow passage and the outflow port are sequentially connected.
The electric element further comprises bus bar components, wherein the two bus bar components are respectively arranged on the top surfaces of the first battery cells and the second battery cells, and the two bus bar components are respectively used for connecting and conducting a plurality of first battery cells in the first battery pack and a plurality of second battery cells in the second battery pack.
The battery pack is characterized by further comprising a bridging busbar piece, wherein the bridging busbar piece is connected with the two busbar components and used for connecting and conducting the first battery pack and the second battery pack.
The battery pack further comprises an insulating plate, wherein the insulating plate is positioned outside the side surfaces of the first battery pack and the second battery pack in the third direction.
Further, buffer foam is arranged on at least one side of the two sides of the first battery pack along the first direction, and buffer foam is arranged on at least one side of the two sides of the second battery pack along the first direction.
Further, the box body also comprises a cooling part, wherein the cooling part is a cooling plate, and the cooling plate forms a side plate of the box body; the battery pack is a small-power battery pack, and the first battery unit and the second battery unit are square aluminum-shell batteries.
The beneficial effects of the utility model are as follows:
1. According to the battery pack, the cooling plates are arranged on the two side surfaces of the battery monomers, so that the cooling contact area is increased, the heat dissipation efficiency is improved, and the circulation path of the coolant in the cooling plates is reasonably optimized, so that the cooling plates can uniformly dissipate heat of all the battery monomers in the battery pack, and the safety performance of the small-power battery pack is improved.
2. The battery pack comprises a first battery pack and a second battery pack, wherein a double-row battery pack structure is formed by connecting the bottoms of the first battery unit and the second battery unit, the grouping mode is optimized, and the energy density of the battery pack is further improved.
3. The battery pack provided by the utility model uses the standard battery monomer, is designed by CTP technology, has no technical difficulty in the whole battery pack process, and is convenient for realizing mass production.
Drawings
Fig. 1 is an exploded view of a battery pack according to the present utility model;
fig. 2 is a schematic view of a battery pack case according to the present utility model;
fig. 3 is a top view of a battery pack case provided by the present utility model;
In the attached drawings, 1-first battery unit, 2-second battery unit, 3-cooling plate, 4-inflow port, 5-outflow port, 6-first runner, 7-second runner, 8-busbar component, 9-bridging busbar piece, 10-insulating board, 11-buffer foam, 12-shell body, 13-upper cover, 14-fixed beam, 15-first connecting layer and 16-third connecting layer.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings and the detailed description, but the present utility model is not limited to the following examples.
Embodiment one:
See figures 1-3. A battery pack comprises a cooling part, an electric element and a first battery pack, wherein the first battery pack comprises a plurality of first battery cells 1, the first battery cells 1 are of three-direction sizes and are stacked in a first direction, the cooling part is at least abutted against the outside of the side face of the first battery cell 1 in the first battery pack in a second direction, and the electric element is at least arranged outside the top face of the first battery cell 1 in the first battery pack in the third direction. As can be seen from the foregoing structure, the present embodiment provides a battery pack, including a cooling component, an electrical element and a first battery pack, where the first battery pack includes a plurality of first battery cells 1, the first battery cells 1 include two oppositely disposed first side surfaces disposed in a first direction, two oppositely disposed second side surfaces disposed in a second direction, and oppositely disposed top and bottom surfaces disposed in a third direction, the first direction, the second direction and the third direction are perpendicular to each other, preferably, the first direction is a thickness direction of the first battery cells 1, the second direction is a length direction of the first battery cells 1, and the third direction is a height direction of the first battery cells 1. Preferably, the first battery unit 1 is a square aluminum shell battery, and the battery pack is a small power battery pack. The top surfaces of the plurality of first battery cells 1 face the same direction and are stacked in the first direction, for example, adjacent first battery cells 1 can be adhered by a first connecting layer 15, and the first connecting layer 15 can be a PC sheet, foam or glue. The cooling parts are respectively attached to the two second side surfaces of the first battery unit 1, and the two second side surfaces of all the first battery units 1 in the first battery pack are contacted with the two cooling parts, the cooling parts are used for radiating heat of the first battery pack, and the cooling parts can be liquid cooling plates. An electrical component is further provided outside the top surface of the first battery cell 1 in the third direction, and the electrical component is connected with the first battery cell 1. The first battery cells 1 are connected to form a first battery pack, the cooling part is abutted against the side surface of the first battery cells 1 to form a side plate of the battery pack, and finally the side plate is put into the shell to form the battery pack. According to the battery pack provided by the utility model, the cooling parts are arranged on the two second side surfaces of the first battery unit 1, so that the cooling contact area is increased, and the heat dissipation capacity of the battery pack is further improved.
Embodiment two:
See figures 1-3. On the basis of the first embodiment, the battery pack further comprises a second battery pack, the second battery pack comprises a plurality of second battery cells 2, the second battery cells 2 are of three-direction sizes and stacked in the first direction, and the second battery cells 2 in the second battery pack and the first battery cells 1 in the first battery pack are stacked in the third direction, so that cooling parts are abutted against the outer sides of the first battery cells 1 and the second battery cells 2 in the second direction. As can be seen from the above structure, the present embodiment provides a battery pack with a dual-row battery pack structure, which includes a first battery pack and a second battery pack, wherein the second battery pack includes a plurality of second battery cells 2, the second battery cells 2 have the same structure as the first battery cells 1, and the second battery cells 2 and the first battery cells 1 are stacked in a third direction. The two cooling components are also respectively attached to the two second side surfaces of the second battery cells 2, and the two second side surfaces of all the second battery cells 2 in the second battery pack are in contact with the two cooling components, and the cooling components are used for simultaneously radiating heat of the first battery pack and the second battery pack.
The top surfaces of the first battery cells 1 and the second battery cells 2 face opposite directions, and the electric element is at least arranged outside the top surface of the second battery cells 2 in the second battery pack in the third direction. According to the structure, the first battery pack and the second battery pack are stacked to form the battery pack with the double-row battery pack structure, when the battery pack is specifically arranged, the top surfaces of the first battery unit 1 and the second battery unit 2 face opposite directions, and the first battery pack and the second battery pack are stacked in the third direction, so that the volume energy density of the battery pack can be effectively improved in a grouping mode. An electrical component is also provided outside the top surface of the second battery cell 2 in the third direction, and the electrical component is connected to the second battery cell 2.
In the third direction, the top surface of the first battery cell 1 and the top surface of the second battery cell 2 are far away from each other, and the bottom surface of the first battery cell 1 and the bottom surface of the second battery cell 2 are close to each other. As can be seen from the above structure, when the first battery pack and the second battery pack are stacked in the third direction, specifically, the top surface of the first battery cell 1 and the top surface of the second battery cell 2 are all outward, and the bottom surface of the first battery cell 1 and the bottom surface of the second battery cell 2 are close to each other, preferably, the first battery cell 1 and the second battery cell 2 are in one-to-one correspondence. As shown in fig. 1, the adjacent first battery cells 1 may be adhered by a first connection layer 15, the adjacent second battery cells 2 may be adhered by a first connection layer 15, the first battery pack and the second battery pack may be adhered by a third connection layer 16, and the third connection layer 16 may be foam bottom. The double-row battery pack structure is formed by the adhesion mode of the bottoms of the first battery monomer 1 and the second battery monomer 2, the grouping mode is optimized, the energy density of the battery pack is improved, and meanwhile, the cooling contact area is increased and the heat dissipation efficiency is improved by arranging the cooling parts on the two second side surfaces of the first battery monomer 1 and the second battery monomer 2.
Embodiment III:
See figures 1-3. On the basis of the second embodiment, the cooling component is provided with an inflow port 4 and an outflow port 5, a cooling flow passage for flowing in from the inflow port 4 and flowing out from the outflow port 5 is arranged in the cooling component, the cooling flow passage comprises a first flow passage 6 and a second flow passage 7, the first flow passage 6 is a circular flow passage, the second flow passage 7 is an S-shaped flow passage, and the inflow port 4, the first flow passage 6, the second flow passage 7 and the outflow port 5 are sequentially connected. As is clear from the above structure, the cooling member is used for radiating heat from the first battery pack and the second battery pack, and specifically, the cooling member is provided with an inlet 4, an outlet 5, and a cooling flow path, and both ends of the cooling flow path are respectively connected with the inlet 4 and the outlet 5. Preferably, the inflow opening 4 and the outflow opening 5 are arranged on the same side of the cooling element. The circulation pump and the radiator may be connected to the outside of the inflow port 4 or the outflow port 5. In operation, coolant flows into the cooling flow channel from the inflow port 4 and finally flows out from the outflow port 5, and the coolant takes away heat generated by the battery pack in the flowing process, so that heat of the battery pack is dissipated. For example, the cooling member is a cooling plate 3, the cooling plate 3 is a liquid cooling plate, and the coolant is cooling water. As shown in fig. 1, the cooling flow channel comprises a first flow channel 6 and a second flow channel 7 which are connected end to end in sequence, the first flow channel 6 is a loop-shaped flow channel and is arranged on the periphery of the cooling plate 3, and the second flow channel 7 is an S-shaped flow channel. According to general thermodynamics, the electrolyte of the battery cell flows upward after being heated, so that the temperature of the top surface of the battery cell is always higher than that of the bottom surface of the battery cell. After the coolant flows into the first flow channel 6 through the inflow port 4, the first flow channel 6 is arranged on the periphery of the cooling plate 3, and the top surfaces of the first battery monomer 1 and the second battery monomer 2 are outwards arranged, so that when the coolant flows along the first flow channel 6, the top surfaces of the first battery monomer 1 and the second battery monomer 2 are firstly radiated, and the rest positions of the first battery monomer 1 and the second battery monomer 2 are radiated through the S-shaped second flow channel 7, so that uniform radiation of the battery pack is realized.
The electric element further comprises bus bar parts 8, wherein the two bus bar parts 8 are respectively arranged on the top surfaces of the first battery cells 1 and the second battery cells 2, and the two bus bar parts 8 are respectively used for connecting and conducting a plurality of first battery cells 1 in the first battery pack and a plurality of second battery cells 2 in the second battery pack. As can be seen from the above structure, the plurality of first battery cells 1 in the first battery pack are connected in series by one bus bar member 8, and the plurality of second battery cells 2 in the second battery pack are connected in series by one bus bar member 8. Wherein, one end of the busbar part 8 is provided with an output port, and the output port is electrically connected with the busbar part 8 and is used for outputting current or electric signals. Preferably, the output port is provided on the same side as the inflow port 4 and the outflow port 5. The shape and size of the busbar member 8 can be adjusted according to the specific situation.
The battery pack also comprises a bridging busbar sheet 9, wherein the bridging busbar sheet 9 is connected with the two busbar parts 8 and is used for connecting and conducting the first battery pack and the second battery pack. According to the structure, the bridging busbar sheets 9 are arranged, and two ends of each bridging busbar sheet 9 are respectively connected with one busbar part 8, so that the first battery pack and the second battery pack are connected in series, and a double-row battery pack structure is formed.
The battery pack further comprises an insulating plate 10, wherein the insulating plate 10 is positioned outside the side surfaces of the first battery pack and the second battery pack in the third direction. As shown in fig. 1 and 2, the insulating plates 10 are disposed on the outermost two sides of the first and second battery packs along the third direction, so that the battery pack can be insulated from the casing after being encased in the casing in the third direction, and the series welding surfaces of the first and second battery packs can be effectively insulated and protected, and the insulating plates 10 can be insulated PC boards.
The first battery pack is provided with buffer foam 11 on at least one side on two sides along the first direction, and the second battery pack is provided with buffer foam 11 on at least one side on two sides along the first direction. As can be seen from the above structure, as shown in fig. 1, by providing the buffer foam 11 on both sides of the first battery pack and the second battery pack in the first direction, insulation from the case after the battery pack is encased in the case can be achieved in the first direction.
The battery pack is a small-power battery pack, and the first battery unit 1 and the second battery unit 2 are square aluminum shell batteries. According to the structure, the first battery pack and the second battery pack are connected to form the double-row battery pack and then are put into the shell to form a battery pack, the cooling plate 3 is attached to the side surfaces of the first battery unit 1 and the second battery unit 2, and the cooling plate 3 forms a side plate of the box body. As shown in fig. 2 and 3, the housing may include a housing body 12 having an open top, and an upper cover 13 detachably coupled to the housing body 12 at the open top, and the housing body 12 includes a housing bottom wall and a housing side wall surrounding the housing bottom wall. A fixing beam 14 may also be provided on the side wall of the housing, and a space surrounded by the fixing beam 14 and the side wall of the housing may be used for placing and mounting the electrical assembly.
When the battery pack is put into the shell, the battery pack can be clamped into the shell through a restraint tool, after the clamping jaw is released, the battery pack expands along a first direction, restraint fixation is realized with the fixed beam 14 and the side wall of the shell, and after an electric assembly is installed, the upper cover 13 is installed, so that the assembly of the battery pack is completed. The battery pack provided by the utility model has no technical difficulty and is convenient for realizing mass production.
It should be understood that the first battery pack and the second battery pack may be CTP (Cell To Pack) battery packs of a modular-free design formed from square aluminum-case cells.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the utility model.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420630729.6U CN222190913U (en) | 2024-03-27 | 2024-03-27 | A battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420630729.6U CN222190913U (en) | 2024-03-27 | 2024-03-27 | A battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222190913U true CN222190913U (en) | 2024-12-17 |
Family
ID=93823621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420630729.6U Active CN222190913U (en) | 2024-03-27 | 2024-03-27 | A battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222190913U (en) |
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2024
- 2024-03-27 CN CN202420630729.6U patent/CN222190913U/en active Active
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