CN220189749U - Battery pack and energy storage device - Google Patents
Battery pack and energy storage device Download PDFInfo
- Publication number
- CN220189749U CN220189749U CN202320956862.6U CN202320956862U CN220189749U CN 220189749 U CN220189749 U CN 220189749U CN 202320956862 U CN202320956862 U CN 202320956862U CN 220189749 U CN220189749 U CN 220189749U
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- Prior art keywords
- liquid
- cooling plate
- battery
- battery pack
- liquid cooling
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- 238000004146 energy storage Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 181
- 238000001816 cooling Methods 0.000 claims abstract description 80
- 238000007654 immersion Methods 0.000 claims abstract description 53
- 238000002955 isolation Methods 0.000 claims description 12
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 239000011324 bead Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Abstract
The utility model relates to the technical field of battery packs and discloses a battery pack and an energy storage device. The battery cell module is arranged in the shell and comprises a plurality of battery cells arranged side by side, and the battery cells are adjacently arranged by the large surface of the battery cell; the liquid cooling plate assembly is arranged on the shell, the liquid cooling plate assembly is provided with a liquid inlet in the height direction along the battery cell module, the shell is provided with a liquid outlet, the liquid inlet and the liquid outlet are arranged on two opposite sides of the battery cell module, the liquid cooling plate assembly is provided with a flow dividing structure communicated with the liquid inlet, and the flow dividing structure is suitable for enabling immersion liquid to flow along the large surface of the battery cell. The utility model can solve the problem of poor cooling effect of the existing flowing immersed cooling scheme, the immersed liquid in the utility model can flow along the large surface of the battery core, the temperature difference between the battery core and the immersed liquid is large, the heat exchange efficiency is high, and the cooling effect is good.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery pack and an energy storage device.
Background
The power battery can produce great heat in the use, and the heat can cause great influence to battery performance, therefore, need in time dispel the heat to power battery to guarantee the battery and operate with better performance, and guarantee the security performance of battery package.
Currently, the cooling of battery packs typically employs an immersion cooling scheme, which uses dielectric immersion cooling, whereby the battery is directly contacted with an electrically insulating working fluid. The submerged cooling of the power cell pack is classified into a flow type and a no-flow type.
In the existing flow type immersed cooling scheme, the circulation flow path of the immersed liquid is long, the heated immersed liquid cannot be discharged in time, the heat exchange efficiency is low, and the cooling effect of the immersed liquid is reduced.
Disclosure of Invention
In view of the above, the present utility model provides a battery pack and an energy storage device to solve the problem of poor cooling effect of the existing flow type immersion cooling scheme.
In a first aspect, the utility model provides a battery pack comprising a housing, a cell module and a liquid cooling plate assembly. The battery cell module is arranged in the shell and comprises a plurality of battery cells arranged side by side, and the battery cells are adjacently arranged by the large surface of the battery cell; the liquid cooling plate assembly is arranged on the shell, the liquid cooling plate assembly is provided with a liquid inlet in the height direction along the battery cell module, the shell is provided with a liquid outlet, the liquid inlet and the liquid outlet are arranged on two opposite sides of the battery cell module, the liquid cooling plate assembly is provided with a flow dividing structure communicated with the liquid inlet, and the flow dividing structure is suitable for enabling immersion liquid to flow along the large surface of the battery cell.
As an alternative embodiment, the liquid cooling plate assembly comprises a first liquid cooling plate arranged on one side of the electric core and a second liquid cooling plate arranged between the first liquid cooling plate and the electric core, the flow dividing structure comprises a plurality of flow passages arranged on the first liquid cooling plate and a plurality of flow dividing holes arranged on the second liquid cooling plate, the flow passages are communicated with the liquid inlet, and the flow dividing holes are communicated with the flow passages.
As an alternative implementation mode, the second liquid cooling plate is arranged perpendicular to the large surface of the battery cell, and the diversion holes are long-strip-shaped and are arranged along the length direction of the battery cell.
As an alternative embodiment, the tap holes are arranged corresponding to the gaps between adjacent cells.
As an alternative implementation mode, an isolation assembly is arranged between large faces of adjacent electric cores, the isolation assembly comprises at least two parting strips arranged at intervals, the parting strips are arranged along the height direction of the electric core module, the parting strips are perpendicular to end covers of the electric cores, and two side faces of the parting strips are simultaneously contacted with the adjacent electric cores.
As an alternative embodiment, the isolating assembly comprises a plurality of spacers arranged side by side, which are adapted to be connected to one large side of the cell at a time by means of a release paper attached to both sides.
As an alternative implementation mode, the shell comprises an upper cover and a lower cover, the cell module is arranged between the upper cover and the lower cover, the liquid outlet is arranged on the lower cover, and the liquid cooling plate module is connected with the upper cover.
As an alternative embodiment, the liquid cooling plate assembly is an upper cover of the battery pack.
As an alternative embodiment, the liquid inlet and the liquid outlet are communicated outside the battery pack through a circulation pipeline, and the immersion liquid is suitable for circulating between the liquid inlet and the liquid outlet.
In a second aspect, the present utility model further provides an energy storage device, including a battery pack according to any one of the above technical solutions.
The beneficial effects are that:
by utilizing the technical scheme provided by the utility model, the immersion liquid enters the liquid cooling plate assembly from the liquid inlet, flows onto the battery cell module under the shunting action of the shunting structure, flows along the large surface of the battery cell, and cools the battery cell; the immersion liquid flows along the large surface of the battery cell, so that the immersion liquid directly contacts the large surface of the battery cell, the temperature difference between the battery cell and the immersion liquid is large, the heat exchange efficiency is high, and the cooling effect is good; because the liquid outlet and the liquid inlet are respectively arranged at the two sides of the electric core module along the height direction, the immersion liquid flows along the height direction of the electric core module. In addition, as the flow path of the immersion liquid is short, the difference between the temperature of the liquid outlet of the immersion liquid and the temperature of the liquid inlet is small, the temperature difference of the battery cell is small, and the temperature uniformity in the battery pack is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is an exploded view of a battery pack according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the liquid cooling plate assembly of FIG. 1;
FIG. 3 is a schematic view of the immersion liquid flow path of FIG. 1;
FIG. 4 is a schematic diagram of a cell and isolation assembly;
fig. 5 is a schematic view of the structure of the isolation assembly prior to assembly.
Reference numerals illustrate:
1. a housing; 2. a battery cell module; 201. a battery cell; 2011. large surface; 3. a liquid cooling plate assembly; 301. a first liquid cooling plate; 3011. a flow passage; 302. a second liquid cooling plate; 3021. a diversion aperture; 4. a liquid inlet; 5. a liquid outlet; 6. an isolation assembly; 601. a parting bead; 602. release paper; 7. a lower cover; 8. a sealing strip; 9. a support beam.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not 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 utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiments of the present utility model are described below in conjunction with fig. 1-5.
According to an embodiment of the present utility model, in one aspect, there is provided a battery pack including a case 1, a cell module 2, and a liquid cooling plate module 3. The battery cell module 2 is arranged in the shell 1, the battery cell module 2 comprises a plurality of battery cells 201 which are arranged side by side, and the battery cells 201 are adjacently arranged by a large surface 2011 of the battery cell 201; the liquid cooling plate assembly 3 is arranged on the shell 1, a liquid inlet 4 is formed in the liquid cooling plate assembly 3 in the height direction along the cell module 2, a liquid outlet 5 is formed in the shell 1, the liquid inlet 4 and the liquid outlet 5 are formed in two opposite sides of the cell module 2, the liquid cooling plate assembly 3 is provided with a flow dividing structure communicated with the liquid inlet 4, and the flow dividing structure is suitable for enabling immersion liquid to flow along a large surface 2011 of the cell 201.
By utilizing the technical scheme provided by the utility model, the immersion liquid enters the liquid cooling plate assembly 3 from the liquid inlet 4, flows onto the battery cell module 2 under the shunting action of the shunting structure, flows along the large surface 2011 of the battery cell 201, and cools the battery cell 201; as the immersion liquid flows along the large surface 2011 of the battery cell 201, the immersion liquid directly contacts the large surface 2011 of the battery cell 201, the temperature difference between the battery cell 201 and the immersion liquid is large, the heat exchange efficiency is high, and the cooling effect is good; because the liquid outlet 5 and the liquid inlet 4 are respectively arranged at the two sides of the cell module 2 along the height direction, the immersion liquid flows along the height direction of the cell module 2, compared with the immersion liquid flowing along the length and width directions of the cell module 2 in the prior art, the flow path of the immersion liquid is short, the immersion liquid after temperature rise can be timely discharged, the heat exchange efficiency is improved, the cooling effect is enhanced, and the working performance of the battery pack is ensured. In addition, because the flow path of the immersion liquid is short, the difference between the temperature of the liquid outlet 5 of the immersion liquid and the temperature of the liquid inlet 4 is smaller, the temperature difference of the battery cell 201 is smaller, and the temperature uniformity in the battery pack is improved.
As an alternative embodiment, referring to fig. 2, the liquid cooling plate assembly 3 includes a first liquid cooling plate 301 disposed on one side of the electric core 201 and a second liquid cooling plate 302 disposed between the first liquid cooling plate 301 and the electric core 201, the flow dividing structure includes a plurality of flow passages 3011 disposed on the first liquid cooling plate 301 and a plurality of flow dividing holes 3021 disposed on the second liquid cooling plate 302, the flow passages 3011 are communicated with the liquid inlet 4, and the flow dividing holes 3021 are communicated with the flow passages 3011.
Specifically, referring to fig. 1, the flow passage 3011 on the first liquid cooling plate 301 plays a role in guiding the immersion liquid. The shape of the flow passage 3011 is not limited, and includes a plurality of elongated flow passages 3011 arranged in parallel as in fig. 1 of the present embodiment 1, and also includes other shapes such as a curved shape or other irregular shape. Of course, regardless of the shape of the flow passage 3011, the first liquid cooling plate 301 is fully distributed so that the immersion liquid dispersedly flows to various positions of the first liquid cooling plate 301. The split aperture 3021 in the second liquid cooled plate 302 is the entrance for immersion liquid into the region of the cell module 2. The immersion liquid enters from the liquid inlet 4, is guided and dispersed to be fully distributed on the whole first liquid cooling plate 301 through the flow passage 3011 on the first liquid cooling plate 301, and is split into the region of the cell module 2 from the plurality of split holes 3021. Since the plurality of the diversion holes 3021 are arranged and are distributed on the second liquid cooling plate 302 corresponding to the region of the cell module 2, the immersion liquid can be diverted to the cells 201 in each region of the cell module 2.
As an alternative embodiment, the edges of the first liquid cooling plate 301 and the second liquid cooling plate 302 are fixedly connected by welding. Of course, holes may be punched and connected by fasteners.
As an alternative embodiment, the second liquid cooling plate 302 is disposed perpendicular to the large surface 2011 of the cell 201, and the shunt hole 3021 is elongated and is disposed along the length direction of the cell 201. Referring to fig. 1, the shape and arrangement direction of the diversion hole 3021 further divert the immersion liquid, so that the immersion liquid can flow to the large face 2011 of the cell 201 more precisely and smoothly.
As an alternative embodiment, the shunt hole 3021 is provided corresponding to the gap between the adjacent cells 201. The arrangement enables the gap between the diversion hole 3021 and the adjacent electric core 201 to be arranged in an aligned mode, so that the direct flow of immersion liquid to the large surface 2011 of the electric core 201 is further improved, and the cooling effect is improved. Referring to fig. 3, the liquid inlet 4 is provided at one end of the battery pack, and the liquid outlet 5 is provided at the other end of the battery pack opposite to the liquid inlet 4. From the perspective of fig. 3, the immersion liquid enters the liquid cooling plate assembly 3 from the liquid inlet 4 at the upper end, flows downward through the plurality of flow dividing holes 3021 of the second liquid cooling plate 302 into the region of the cell module 2 after being guided and dispersed by the flow channel 3011 of the first liquid cooling plate 301, flows in the gap between the large faces 2011 of the cell 201, flows from the upper portion of the cell 201 to the bottom of the cell 201, and is discharged from the liquid outlet 5.
As an alternative embodiment, the liquid inlet 4 and the liquid outlet 5 are connected outside the battery pack by a circulation line, adapted to circulate the immersion liquid between the liquid inlet 4 and the liquid outlet 5.
As an alternative embodiment, referring to fig. 4, an isolation component 6 is disposed between large faces 2011 of adjacent cells 201, where the isolation component 6 includes at least two parting strips 601 disposed at intervals, the parting strips 601 are disposed along the height direction of the cell module 2, and two sides of the parting strips 601 are simultaneously contacted with the adjacent cells 201. In the prior art, a partition board is arranged between adjacent electric cores 201 to play a supporting role, but the space occupied by the partition board is large, and the large surface 2011 of the larger electric core 201 is shielded, in this embodiment, through arranging the isolation component 6, on one hand, the electric cores 201 can be supported, gaps between the adjacent electric cores 201 are kept, on the other hand, a plurality of division bars 601 in the isolation component 6 are arranged at intervals, the gaps between the adjacent division bars 601 form a channel for the flow of immersion liquid, so that the immersion liquid flowing into the gaps between the adjacent electric cores 201 flows along the channel limited by the division bars 601, and a third diversion effect is played on the immersion liquid, so that the cooling effect of the immersion liquid is further improved. Compared with the scheme of diversion of the immersion liquid by means of the water pipe in the existing scheme, in the embodiment, the diversion holes 3021 and the parting strips 601 are adopted to divert or divert the immersion liquid, the second liquid cooling plate 302 and the parting strips 601 occupy small space, and the volume utilization rate of the battery pack is improved.
As an alternative embodiment, the gap between the shunt hole 3021 and the adjacent division bar 601 is provided correspondingly. Therefore, the immersion liquid directly flows into the gaps between the adjacent parting strips 601 from the diversion holes 3021, so that the flow path of the immersion liquid is further shortened, the flow of the immersion liquid is smoother, the circulating flow speed of the immersion liquid is improved, the immersion liquid after temperature rise can be smoothly discharged, and the cooling effect on the battery cell 201 is improved.
As an alternative embodiment, the isolating assembly 6 comprises a plurality of spacers 601 arranged side by side, the plurality of spacers 601 being adapted to be connected simultaneously to one large face 2011 of the cell 201 at a time by means of a release paper 602 glued on both sides. Considering that the number of parting strips 601 is large, the number of steps is increased when the parting strips 601 are adhered one by one, in this embodiment, the parting strips 601 are designed in the manner shown in fig. 5 when the parting strips 601 are fed, and release papers 602 are adhered on both sides of the parting strips 601. In actual installation, one side of the release paper 602 is torn off, the isolation assembly 6 with the rest release paper 602 is adhered to the large surface 2011 of the cell 201, and then the other release paper 602 is torn off to be adhered to the next cell 201. By the arrangement, one parting bead 601 is not required to be adhered, working hours are reduced, meanwhile, the accuracy of the width of the flow passage 3011 between the parting beads 601 can be guaranteed, and the cooling uniformity of immersion liquid to the battery cell 201 is guaranteed.
As an alternative embodiment, the casing 1 includes an upper cover and a lower cover 7, the cell module 2 is disposed between the upper cover and the lower cover 7, the liquid outlet 5 is disposed in the lower cover 7, and the liquid cooling plate module 3 is connected to the upper cover.
As an alternative embodiment, the liquid cooling plate assembly 3 is an upper cover of the battery pack. That is, the liquid cooling plate assembly 3 is used as an upper cover, so that the structure of the battery can be simplified, the dimension of the battery pack in the Z direction is reduced, namely, the height of the battery pack is reduced, the volume utilization rate of the battery pack is improved, the manufacturing cost is reduced, and the lightweight design of the battery pack and the whole vehicle is facilitated.
As an alternative embodiment, referring to fig. 1, a support beam 9 is provided in the case 1, the support beam 9 includes cross beams and vertical beams disposed to cross each other, the cross beams and the vertical beams divide a space in the case 1 into a plurality of regions, and a plurality of battery modules are respectively disposed in the different regions. The support beam 9 serves as a support for the upper and lower covers 7 and 2.
Sealing strips 8 are arranged on two sides of the battery cell module 2 in the shell 1, and the battery cell module 2 is sealed in the shell 1 along the periphery of the shell 1 by the sealing strips 8 to prevent liquid leakage of immersion liquid.
The battery pack provided by the embodiment of the utility model has the following advantages:
1. the direction of the immersed liquid flow channel 3011 is changed into the height direction with smaller distance, and the immersed liquid directly flows through the large surface 2011 of the cell 201 through the flow dividing structure, so that the length of the flow path of the immersed liquid is reduced, the heat exchange efficiency of the immersed liquid can be improved, and the temperature uniformity in the battery pack can be improved;
2. the spacers between the cells 201 are replaced by a plurality of spacers 601, so that the flow channel 3011 can be provided for the flow of the immersion liquid while ensuring the gaps of the cells 201.
3. The liquid cooling plate assembly 3 is directly used as an upper cover of the battery pack, so that the Z-direction height is reduced, and the volume utilization rate of the battery pack is improved.
According to an embodiment of the present utility model, in another aspect, there is provided an energy storage device including the battery pack according to any one of the above technical solutions.
As an alternative embodiment, a pump is provided on the circulation line outside the battery pack and through the condenser of the vehicle. From the above, the immersion liquid and the electric core 201 exchange heat and then are discharged from the liquid outlet 5, the discharged high-temperature immersion liquid is cooled by the condenser at the whole vehicle end and then pumped to the liquid inlet 4 of the liquid cooling plate to form circulation.
Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.
Claims (9)
1. A battery pack, comprising:
a housing;
the battery cell module is arranged in the shell and comprises a plurality of battery cells arranged side by side, and the battery cells are adjacently arranged by the large surface of the battery cells;
the liquid cooling plate assembly is arranged on the shell, a liquid inlet is formed in the liquid cooling plate assembly in the height direction of the battery cell module, a liquid outlet is formed in the shell, the liquid inlet and the liquid outlet are formed in two opposite sides of the battery cell module, the liquid cooling plate assembly is provided with a flow dividing structure communicated with the liquid inlet, and the flow dividing structure is suitable for enabling immersion liquid to flow along the large surface of the battery cell;
the liquid cooling plate assembly comprises a first liquid cooling plate arranged on one side of the electric core and a second liquid cooling plate arranged between the first liquid cooling plate and the electric core, the flow dividing structure comprises a plurality of flow passages arranged on the first liquid cooling plate and a plurality of flow dividing holes arranged on the second liquid cooling plate, the flow passages are communicated with the liquid inlet, and the flow dividing holes are communicated with the flow passages.
2. The battery pack according to claim 1, wherein the second liquid cooling plate is arranged perpendicularly to the large surface of the cell, and the flow dividing hole is elongated and is provided along the length direction of the cell.
3. The battery pack according to claim 2, wherein the separation holes are provided in correspondence with gaps between the adjacent cells.
4. A battery pack according to any one of claims 1 to 3, wherein an isolation assembly is provided between large faces of adjacent cells, the isolation assembly comprising at least two spacer bars arranged at intervals, the spacer bars being arranged in the height direction of the cell module, and both sides of the spacer bars being in contact with adjacent cells at the same time.
5. The battery pack of claim 4, wherein the separator assembly comprises a plurality of separator strips arranged side by side, and wherein a plurality of the separator strips are adapted to be simultaneously connected to one large surface of the battery cell at a time by means of release paper adhered to both sides.
6. A battery pack according to any one of claims 1 to 3, wherein the housing comprises an upper cover and a lower cover, the cell module is disposed between the upper cover and the lower cover, the liquid outlet is disposed in the lower cover, and the liquid cooling plate module is connected to the upper cover.
7. A battery pack according to any one of claims 1 to 3, wherein the liquid cooling plate assembly is an upper lid of the battery pack.
8. A battery pack according to any one of claims 1 to 3, wherein the liquid inlet and the liquid outlet are in communication with each other outside the battery pack via a circulation line, adapted to circulate immersion liquid between the liquid inlet and the liquid outlet.
9. An energy storage device comprising a battery pack according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320956862.6U CN220189749U (en) | 2023-04-24 | 2023-04-24 | Battery pack and energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320956862.6U CN220189749U (en) | 2023-04-24 | 2023-04-24 | Battery pack and energy storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220189749U true CN220189749U (en) | 2023-12-15 |
Family
ID=89115907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320956862.6U Active CN220189749U (en) | 2023-04-24 | 2023-04-24 | Battery pack and energy storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220189749U (en) |
-
2023
- 2023-04-24 CN CN202320956862.6U patent/CN220189749U/en active Active
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