CN219959160U - Heat balance battery pack and battery pack energy storage system - Google Patents
Heat balance battery pack and battery pack energy storage system Download PDFInfo
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- CN219959160U CN219959160U CN202223549703.9U CN202223549703U CN219959160U CN 219959160 U CN219959160 U CN 219959160U CN 202223549703 U CN202223549703 U CN 202223549703U CN 219959160 U CN219959160 U CN 219959160U
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- battery
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- battery pack
- heat
- battery module
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- 238000004146 energy storage Methods 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 12
- 239000000110 cooling liquid Substances 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000004512 die casting Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000012546 transfer 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 relates to a heat balance battery pack and a battery pack energy storage system, wherein the battery pack comprises a battery module, a front end plate, a rear end plate, a bottom plate, a liquid cooling plate and an upper cover, wherein the liquid cooling plate is used for taking heat of the battery module away through cooling liquid; the front end plate is arranged at the front end of the battery module; the rear end plate is arranged at the rear end of the battery module; the bottom plate is positioned at the bottom end of the battery module; a runner is arranged in the liquid cooling plate; the two liquid cooling plates are respectively arranged at the two sides of the battery module; a heat conduction pad is arranged between the liquid cooling plate and the battery module; the outer side of the liquid cooling plate is provided with a heat insulation paste; the battery module is connected with the positive and negative electrode output ends through copper bars; the copper bars are arranged on the front end plate; the front end plate, the rear end plate, the bottom plate, the liquid cooling plate and the upper cover are fixed into a cuboid-shaped frame structure which wraps the battery module through fasteners. Compared with the prior art, the utility model has the advantages of uniform temperature difference, good heat dissipation effect, simple structure and the like.
Description
Technical Field
The utility model relates to the field of electric power energy storage, in particular to a heat balance battery pack and a battery pack energy storage system.
Background
With the rapid development of the electric automobile industry, the requirement for the battery pack is increasing, and the safety problem of the battery pack is also important. When the battery pack is operated as an automobile to provide power, the battery pack can generate higher temperature, if heat dissipation is not timely carried out, the battery pack can be damaged, the use of the electric automobile is affected, and even safety risks are brought.
The liquid cooling mode of the current liquid cooling battery pack mainly uses bottom liquid cooling, the temperature difference of the square battery cell in the height direction of the battery cell (the battery cell pole column and the bottom of the battery cell shell) is larger, along with the increase of the height, such as 280Ah (174X 74X204 width and thickness) common in the market, if the temperature difference of 7-10 ℃ exists in the bottom liquid cooling mode, the temperature difference between the top and the bottom of the single battery cell has larger influence on the cycle life and the safety of the battery cell, and the battery pack in the current market mainly comprises key parts such as a module, a liquid cooling system, a box body and the like, so that the structure is more complex and the cost is higher; liquid cooling energy storage systems in the current market are generally integrated into liquid cooling modules by battery cells (cells), a battery Pack (Pack) is formed by the modules, the battery packs are connected in series to form a battery cluster (Rack), and the battery Pack has a plurality of interfaces and a complex structure.
Therefore, how to realize a battery pack with high-performance heat balance and a battery pack energy storage system with a simple structure are technical problems to be solved.
Disclosure of Invention
The present utility model is directed to a heat balance battery pack and a battery pack energy storage system that overcomes the above-described drawbacks of the prior art.
The aim of the utility model can be achieved by the following technical scheme:
the battery pack comprises a battery module, a front end plate, a rear end plate, a bottom plate, a liquid cooling plate and an upper cover, wherein the liquid cooling plate is used for taking away heat of the battery module through internal cooling liquid; the front end plate is arranged at the front end of the battery module; the rear end plate is arranged at the rear end of the battery module; the bottom plate is positioned at the bottom end of the battery module; a flow passage for circulating cooling liquid is arranged in the liquid cooling plate; the two liquid cooling plates are respectively arranged at the two sides of the battery module; a heat conduction pad is arranged between the liquid cooling plate and the battery module; the outer side of the liquid cooling plate is provided with a heat-insulating patch for isolating heat; the battery module is connected with the positive and negative electrode output ends through copper bars; the copper bars are arranged on the front end plate; the front end plate, the rear end plate, the bottom plate, the liquid cooling plate and the upper cover are fixed into a cuboid-shaped frame structure which wraps the battery module through fasteners.
Further, the battery module comprises a plurality of electric cores, heat-conducting glue for conducting heat of the electric cores and a phase-change temperature-equalizing plate for equalizing temperature difference of the electric cores in all directions; the phase-change temperature-equalizing plate is connected with the side surface of the battery cell; the heat-conducting glue is positioned between the battery cell and the phase-change temperature-equalizing plate; the plurality of the battery cells are connected in series.
Further, the top of the battery module is provided with an acquisition circuit module for acquiring the voltage and the temperature of the current core; the acquisition circuit module comprises a battery cell voltage acquisition terminal, a battery cell temperature acquisition terminal and an overcurrent aluminum row; the battery cell voltage acquisition terminal and the battery cell temperature acquisition terminal are welded on the overcurrent aluminum row; and the overcurrent aluminum row is welded with the electrode post of the battery cell to form a conductive loop.
Further, elastic elements for absorbing thickness tolerance of the battery cell are arranged at two ends of the battery module.
Further, the front end plate is provided with a terminal seat and a battery management module for detecting the voltage and temperature conditions of the battery cell; the battery management module is connected with the acquisition line module through the line speed.
Further, the heat-conducting glue is heat-conducting glue with the heat conductivity coefficient of 0.5-3W/mK; the phase-change temperature-equalizing plate is a temperature-equalizing plate with micro channels inside and filled with phase-change working medium.
Further, grooves for limiting and fixing when the front end plate and the rear end plate are assembled into an energy storage system are formed in the rear parts of the front end plate and the rear end plate; the bottom plate bottom set up the reinforcing beam that is used for supporting the weight of battery module.
The battery pack energy storage system adopting the heat balance battery pack comprises a frame, a supporting frame, a vertical beam and a plurality of limiting brackets, wherein the supporting frame is used for contacting with a bottom plate of the battery pack to support the weight of the battery pack, the vertical beam is used for being matched with a groove of a rear end plate to limit the battery pack left and right, and the limiting brackets are used for limiting the battery pack in the vertical direction; the two supporting frames are respectively fixed at two sides of the frame; the vertical beam is fixed at the rear side of the frame; a plurality of limit brackets are fixed on the vertical beam; the front end plate is connected with the supporting frames on the two sides through the grooves.
Further, a plurality of limit brackets are uniformly fixed on the vertical beam through welding.
Further, the energy storage system comprises a plurality of battery packs; the plurality of battery packs are electrically connected through the copper bars connected in series.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the utility model, the phase change temperature equalization plates are arranged among the electric cores, so that the temperature difference of the electric cores in all directions is reduced to be within 2 ℃, the problem of overlarge temperature difference between the upper and lower electric core monomers is solved, the electric cores achieve high-performance heat balance, and the electric core temperature equalization device is safe and reliable and effectively prevents electric core damage and safety accidents caused by heat conduction.
2. According to the utility model, the liquid cooling plate is arranged at the side of the battery pack and contacts with the phase-change temperature equalizing plate to take away the heat of the battery core, so that the temperature difference of the battery pack can be controlled within 3-5 ℃ under the condition of continuous charge and discharge of 1C under high multiplying power, and the heat balance and heat dissipation can be effectively carried out.
3. The structure of the utility model further simplifies the battery cluster structure, and the energy storage system in the CTR form is formed by directly connecting the battery packs, so that the integration step of the battery packs is omitted, the structure is simple, the number of parts is further reduced, the cost is lower, the space utilization rate of the energy storage system is improved, and the weight is reduced;
drawings
Fig. 1 is a schematic view of a battery pack according to the present utility model;
FIG. 2 is a schematic diagram of a battery module finished product of the present utility model;
fig. 3 is a schematic view of a battery module structure according to the present utility model;
FIG. 4 is a schematic diagram of the installation structure of the battery cell and the phase-change temperature-equalizing plate of the utility model;
FIG. 5 is a schematic view of the structure of the base plate of the present utility model;
FIG. 6 is a schematic diagram of the finished battery pack assembly of the present utility model;
FIG. 7 is a schematic diagram of an energy storage system according to the present utility model;
FIG. 8 is a side-to-side schematic view of a battery pack of the present utility model in an energy storage system;
FIG. 9 is a schematic view of a vertical orientation of a battery pack of the present utility model in an energy storage system;
fig. 10 is a schematic diagram of a plurality of battery packs connected in series in the energy storage system of the present utility model.
The reference numerals in the figures are:
101. the battery cell, 102, heat conducting glue, 103, a phase-change temperature equalizing plate, 200, a battery module, 201, an acquisition circuit module, 202, an elastic element, 300, a battery pack, 301, a copper bar, 302, a front end plate, 303, a rear end plate, 304, a bottom plate, 305, a liquid cooling plate, 306, a heat conducting pad, 307, a heat insulating paste, 308, a battery management module, 309, a wire harness, 310, an upper cover, 321, a terminal seat, 400, a frame, 401, a support frame, 402, a vertical beam, 403 and a limiting support.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present utility model, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present utility model is not limited to the following examples.
Examples
As shown in fig. 1 and 2, a heat balance battery pack 300 includes a battery module 200, a front end plate 302, a rear end plate 303, a bottom plate 304, a liquid cooling plate 305, and an upper cover 310; the front end plate 302 may be in the form of an aluminum profile or a die casting, and is placed at the front end of the battery module 200 to bear the final expansion force of the battery module 200; the rear end plate 303 may be in the form of an aluminum profile or a die casting, and is disposed at the rear end of the battery module 200 to bear the final expansion force of the battery module 200; the bottom plate 304 may be made of aluminum steel or steel material, and is located at the bottom end of the battery module 200, and is bonded to the bottom of the battery module 200 by using structural adhesive or heat-conducting structural adhesive; the liquid cooling plate 305 can be made of aluminum steel or steel material, and is internally provided with a runner for cooling liquid circulation; the two liquid cooling plates 305 are respectively arranged at two sides of the battery module 200 and are used for taking away the heat of the battery module 200 through the cooling liquid in the liquid cooling plates 305; a heat conducting pad 306 is arranged between the liquid cooling plate 305 and the battery module 200; the outside of the liquid cooling plate 305 is provided with a heat insulation paste 307 for insulating heat; the battery module 200 is connected with the positive and negative output ends through copper bars 301; the copper bar 301 is arranged on the front end plate 302; the upper cover 310 is made of insulating, flame-retardant and nonmetallic materials and is used for insulation protection; the front end plate 302, the rear end plate 303, the bottom plate 304, the liquid cooling plate 305 and the upper cover 310 are fixed by fasteners 311 to form a rectangular frame structure for wrapping the battery module 200, so as to restrict the battery module 200 from falling off due to excessive weight.
As shown in fig. 3 and 4, the battery module 200 includes a plurality of electric cells 101, a heat conductive adhesive 102 and a phase change temperature equalizing plate 103; the phase-change temperature-equalizing plate 103 is connected with the side surface of the battery cell 101 and is used for equalizing the temperature difference of the battery cell 101 in all directions; the heat-conducting glue 102 is positioned between the battery cell 101 and the phase-change temperature-equalizing plate 103, and is extruded by the liquid cooling plate 305 during assembly, so that the battery cell 101 is fully contacted with the phase-change temperature-equalizing plate 102, the thermal resistance is reduced, and the heat on the side surface of the battery cell 101 is conducted to the phase-change temperature-equalizing plate 103; a plurality of the battery cells 101 are connected in series; the top of the battery module 200 is provided with an acquisition circuit module 201 for acquiring the voltage and temperature of the electric core 101; the acquisition line module 201 comprises a battery cell voltage acquisition terminal, a battery cell temperature acquisition terminal and an overcurrent aluminum row; the battery cell voltage acquisition terminal and the battery cell temperature acquisition terminal are welded on the overcurrent aluminum row; the overcurrent aluminum row is welded with the pole of the battery cell 101 to form a conductive loop; the elastic elements 202 are arranged at two ends of the battery module 200 and used for absorbing the thickness tolerance of the battery cell 101, ensuring the assembly of the liquid cooling plates 305 at two sides, the front end plate 302 and the rear end plate 303, simultaneously playing a role of heat insulation, avoiding the temperature difference in the battery pack 300 from being further increased due to heat dissipation of the end plates of the battery module 200 at two ends, and further compressing the elastic elements 202 along with the increase of the thickness of the battery cell 101 at the end of the cycle, wherein the elastic elements 202 simultaneously provide larger rebound stress, and the service life of the battery cell 101 is slowed down and rapidly attenuated; the heat-conducting glue 102 is heat-conducting glue with a heat conduction coefficient of 0.5-3W/mK; the phase-change temperature-equalizing plate 103 is internally provided with micro-channels and is filled with phase-change working medium, and has high heat transfer density which can reach 600W/cm 2 ～1000W/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the High heat conducting performance, and the heat conducting coefficient can reach 4000-10000W/m.K; gao Junwen, the temperature difference can be controlled within 1 deg.C.
As shown in fig. 5 and 6, the front end plate 302 is provided with a terminal block 321 and a battery management module 308; the battery management module 308 is connected with the acquisition circuit module 201 through a line speed 309 and is used for detecting the voltage and temperature conditions of the battery cell 101; grooves are formed at the rear parts of the front end plate 302 and the rear end plate 303 and are used for limiting and fixing when the energy storage system is assembled; the bottom of the bottom plate 304 is provided with a reinforcing beam for supporting the weight of the battery module 200.
As shown in fig. 7 to 10, a battery pack energy storage system adopting the heat balance battery pack comprises a frame 400, a support frame 401, a vertical beam 402 and a plurality of limit brackets 403; the two supporting frames 401 are respectively fixed at two sides of the frame 400 and are used for contacting with the bottom plate 304 of the battery pack 300 to support the weight of the battery pack 300; the vertical beam 402 is fixed at the rear side of the frame 400 and is used for being matched with the groove of the rear end plate 303 to limit the battery pack 300 left and right; a plurality of limiting brackets 403 are fixed on the vertical beams 402 and are used for limiting the battery pack 300 in the vertical direction; a plurality of limit brackets 403 are uniformly fixed on the vertical beams 402 by welding; the energy storage system includes a plurality of battery packs 300; when the battery pack 300 is assembled, the battery pack 300 is sequentially placed on the support frame 401 and pushed inwards, and the rear end is respectively restrained from jumping left and right and up and down through the vertical beams 402 and the limiting brackets 403; the front end is connected with the frames of the support frames 401 on two sides through the grooves on the front end plate 302 of the battery pack 300, a plurality of battery packs 300 are electrically connected through the copper bars in series, so that an energy storage system in a CTR (Cell to Rack) mode is formed, the integration step of the battery pack 300 is omitted, the structure is simple, the number of parts is further reduced, the cost is lower, the space utilization rate of the energy storage system is improved, and the weight is reduced.
The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (10)
1. A heat balance battery pack, wherein the battery pack (300) comprises a battery module (200), a front end plate (302), a rear end plate (303), a bottom plate (304), a liquid cooling plate (305) for taking heat of the battery module (200) through internal cooling liquid, and an upper cover (310); the front end plate (302) is arranged at the front end of the battery module (200); the rear end plate (303) is arranged at the rear end of the battery module (200); the bottom plate (304) is positioned at the bottom end of the battery module (200); a flow passage for circulating cooling liquid is arranged in the liquid cooling plate (305); the number of the liquid cooling plates (305) is two, and the liquid cooling plates are respectively arranged at two sides of the battery module (200); a heat conduction pad (306) is arranged between the liquid cooling plate (305) and the battery module (200); the outside of the liquid cooling plate (305) is provided with a heat insulation paste (307) for isolating heat; the battery module (200) is connected with the positive electrode output end and the negative electrode output end through copper bars (301); the copper bar (301) is arranged on the front end plate (302); the front end plate (302), the rear end plate (303), the bottom plate (304), the liquid cooling plate (305) and the upper cover (310) are fixed into a cuboid frame structure which wraps the battery module (200) through fasteners (311).
2. The heat balance battery pack according to claim 1, wherein the battery module (200) comprises a plurality of electric cells (101), a heat conducting adhesive (102) for conducting heat of the electric cells (101), and a phase change temperature equalizing plate (103) for equalizing temperature differences of the electric cells (101); the phase-change temperature-equalizing plate (103) is connected with the side surface of the battery cell (101); the heat-conducting glue (102) is positioned between the battery core (101) and the phase-change temperature-equalizing plate (103); a plurality of the battery cells (101) are connected in series.
3. A heat balance battery pack according to claim 2, wherein the battery module (200) is provided with a collecting line module (201) on top for collecting the voltage and temperature of the current core (101); the acquisition circuit module (201) comprises a battery cell voltage acquisition terminal, a battery cell temperature acquisition terminal and an overcurrent aluminum row; the battery cell voltage acquisition terminal and the battery cell temperature acquisition terminal are welded on the overcurrent aluminum row; and the overcurrent aluminum row is welded with the pole of the battery core (101) to form a conductive loop.
4. A heat balance battery pack according to claim 2, wherein the battery module (200) is provided with elastic members (202) at both ends thereof for absorbing thickness tolerance of the battery cells (101).
5. A heat balance battery pack according to claim 3, wherein the front end plate (302) is provided with a terminal block (321) and a battery management module (308) for detecting the voltage and temperature conditions of the battery cells (101); the battery management module (308) is connected with the acquisition line module (201) through a line speed (309).
6. The heat balance battery pack according to claim 2, wherein the heat conductive adhesive (102) is a heat conductive adhesive having a heat conductivity coefficient of 0.5-3W/mK; the phase-change temperature-equalizing plate (103) is a temperature-equalizing plate with micro channels inside and filled with phase-change working medium.
7. The heat balance battery pack according to claim 1, wherein the rear parts of the front end plate (302) and the rear end plate (303) are provided with grooves for limiting and fixing when the battery pack is assembled into an energy storage system; the bottom of the bottom plate (304) is provided with a reinforcing beam for supporting the weight of the battery module (200).
8. A battery pack energy storage system adopting the heat balance battery pack according to claim 7, wherein the energy storage system comprises a frame (400), a supporting frame (401) for contacting with a bottom plate (304) of the battery pack (300) to support the weight of the battery pack (300), a vertical beam (402) for limiting the battery pack (300) left and right in cooperation with a groove of a rear end plate (303), and a plurality of limiting brackets (403) for limiting the battery pack (300) in the vertical direction; the two support frames (401) are respectively fixed at two sides of the frame (400); the vertical beam (402) is fixed at the rear side of the frame (400); a plurality of limit brackets (403) are fixed on the vertical beams (402); the front end plate (302) is connected with the supporting frames (401) on the two sides through grooves.
9. The energy storage system of claim 8, wherein a plurality of said spacing brackets (403) are uniformly secured to the vertical beams (402) by welding.
10. The energy storage system of claim 8, wherein the energy storage system comprises a plurality of battery packs (300); the plurality of battery packs (300) are electrically connected through the series copper bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223549703.9U CN219959160U (en) | 2022-12-29 | 2022-12-29 | Heat balance battery pack and battery pack energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223549703.9U CN219959160U (en) | 2022-12-29 | 2022-12-29 | Heat balance battery pack and battery pack energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219959160U true CN219959160U (en) | 2023-11-03 |
Family
ID=88549649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223549703.9U Active CN219959160U (en) | 2022-12-29 | 2022-12-29 | Heat balance battery pack and battery pack energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219959160U (en) |
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2022
- 2022-12-29 CN CN202223549703.9U patent/CN219959160U/en active Active
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