CN219832764U - Immersed cooling battery pack and energy storage cooling system - Google Patents
Immersed cooling battery pack and energy storage cooling system Download PDFInfo
- Publication number
- CN219832764U CN219832764U CN202223539721.9U CN202223539721U CN219832764U CN 219832764 U CN219832764 U CN 219832764U CN 202223539721 U CN202223539721 U CN 202223539721U CN 219832764 U CN219832764 U CN 219832764U
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- Prior art keywords
- liquid
- battery pack
- cooling
- immersion
- battery
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- 238000001816 cooling Methods 0.000 title claims abstract description 40
- 238000004146 energy storage Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 95
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 16
- 238000007654 immersion Methods 0.000 claims description 46
- 238000007789 sealing Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000012982 microporous membrane Substances 0.000 claims description 8
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 claims description 5
- 230000015556 catabolic process Effects 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- WVSNNWIIMPNRDB-UHFFFAOYSA-N 1,1,1,3,3,4,4,5,5,6,6,6-dodecafluorohexan-2-one Chemical compound FC(F)(F)C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F WVSNNWIIMPNRDB-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray 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
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model relates to an immersed cooling battery pack and an energy storage cooling system, wherein the battery pack comprises a lower box body and an upper cover; the lower box body and the upper cover are fixed through bolts; the lower box body is provided with a liquid outlet, a liquid inlet, a high-voltage connector and a battery management unit for judging whether thermal runaway occurs; the fixed position of the liquid inlet is higher than the fixed position of the liquid outlet; the battery module is fixed in the lower box body through bolts, and immersed liquid is filled in the lower box body; the battery module is connected with the battery management unit through a wire harness; the anode and the cathode of the battery module are connected with the anode and the cathode of the high-voltage connector through copper bars; the upper cover is fixedly provided with a pressure release valve for gas exchange between the inside and the outside of the battery pack through bolts. Compared with the prior art, the utility model has the advantages of good cooling and heat dissipation effects, reduced risk of thermal runaway, simple structure and the like.
Description
Technical Field
The utility model relates to the field of battery pack cooling, in particular to an immersed cooling battery pack and an energy storage cooling system.
Background
The cooling mode of battery packs in the current energy storage market mainly comprises liquid cooling and air cooling modes, no matter which mode is adopted, certain temperature difference exists between battery cells in one battery pack and between the top and the bottom of a single battery cell, so that the cycle life and the safety of the battery cells are greatly influenced.
At present, the battery core for energy storage is mainly lithium iron phosphate, under the condition of overcharge or thermal runaway, in order to avoid further expansion of fire disaster, a fire extinguishing system is arranged in a battery pack and a battery cluster, and the fire extinguishing agent mainly adopts gases such as heptafluoropropane and perfluoro-hexanone to extinguish fire, wherein the heptafluoropropane cannot realize battery module-level fire, and the perfluoro-hexanone fire extinguishing system needs accessories such as a detector, a spray head and the like matched with the module or the battery pack, so that the cost is high, the system structure is complex, and the fire extinguishing effect is limited.
Therefore, how to realize effective cooling of the battery pack and to realize effective fire extinguishing under overcharge or thermal runaway becomes a technical problem to be solved.
Disclosure of Invention
The present utility model is directed to a submerged cooling battery pack and an energy storage cooling system that overcome the above-mentioned drawbacks of the prior art.
The aim of the utility model can be achieved by the following technical scheme:
an immersed cooling battery pack, the battery pack comprises a lower box body and an upper cover; the lower box body and the upper cover are fixed through bolts; the lower box body is provided with a liquid outlet, a liquid inlet, a high-voltage connector and a battery management unit for judging whether thermal runaway occurs; the fixed position of the liquid inlet is higher than the fixed position of the liquid outlet; the battery module is fixed in the lower box body through bolts, and immersed liquid is filled in the lower box body; the battery module is connected with the battery management unit through a wire harness; the anode and the cathode of the battery module are connected with the anode and the cathode of the high-voltage connector through copper bars; the upper cover is fixedly provided with a pressure release valve for gas exchange between the inside and the outside of the battery pack through bolts.
Further, a sealing strip or sealant for sealing is arranged between the lower box body and the upper cover.
Further, the liquid outlet and the liquid inlet are both provided with stop valves for preventing leakage of immersion liquid during maintenance.
Further, the stop valve comprises a pipeline outer wall, a valve body and a spring; the valve body and the spring are arranged inside the outer wall of the pipeline; the valve body is connected with the spring.
Further, a sealing ring for sealing is arranged on the valve body.
Further, the battery module comprises a plurality of single battery cells and copper bars connected in series among the battery cells which are connected in series with the single battery cells; the battery cells are connected in series with copper bars, and a single battery cell voltage acquisition terminal and a single battery cell temperature acquisition terminal are arranged on the copper bars; the copper bars connected in series between the battery cores are also provided with output connectors for converging collected voltage and temperature signals; the output connector is connected with the battery management unit through a wire harness.
Further, the pressure relief valve comprises a pressure relief valve shell, a waterproof and breathable tetrafluoroethylene microporous membrane and a pressure relief valve body, wherein the pressure relief valve body is used for being jacked by air pressure to finish pressure relief; the pressure relief valve body is arranged in the pressure relief valve shell; the tetrafluoroethylene microporous membrane is arranged in the pressure release valve body.
Further, the resistivity of the immersion liquid is more than 1X10 14 An immersion liquid having an ohm-cm and a breakdown voltage greater than 30 kV/mm.
Further, the height of the immersion liquid in the lower box body is higher than 80% of that of the battery module and lower than the upper cover.
The energy storage cooling system comprises a water pump for conveying immersion liquid, a cooler for cooling the immersion liquid, a liquid storage tank for storing the cooled immersion liquid, a hydraulic pump for pumping the immersion liquid from the liquid storage tank and conveying the immersion liquid to a liquid inlet, a heater for heating the immersion liquid under a low-temperature condition and a flowmeter for controlling the flow rate of the liquid inlet, which are connected through pipelines in sequence; the water pump is connected with the liquid outlet; the flowmeter is connected with the liquid inlet.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the utility model, the single-phase immersion liquid is adopted to directly contact the battery cell, the radiating surface of the battery cell is larger, the extremely high heat transfer rate is realized, the temperature uniformity between the battery cell monomer and the battery cell is greatly ensured, the service life of the battery cell is facilitated, and meanwhile, the immersion liquid fully submerges the battery as a fire extinguishing agent, so that the risk and influence of thermal runaway are reduced.
2. The utility model adopts the immersed cooling battery pack to cancel the battery pack and the fire-fighting system in the battery cluster, thereby simplifying the system design and reducing the complexity of the system.
3. According to the utility model, a plurality of battery packs can be connected in series through the energy storage cooling system, so that the temperature of the battery packs is effectively controlled, the flow and the temperature of the immersion liquid are controlled, and the circulation of the immersion liquid in the system is completed.
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 pack assembly of the present utility model;
FIG. 3 is a schematic diagram of a shut-off valve according to the present utility model;
fig. 4 is a schematic view of a battery module structure according to the present utility model;
FIG. 5 is a schematic diagram of a pressure relief valve according to the present utility model;
FIG. 6 is a schematic illustration of an immersion liquid of the present utility model;
fig. 7 is a schematic diagram of an energy storage cooling system according to the present utility model.
The reference numerals in the figures are:
101. the battery cell comprises a battery cell, 102, copper bars connected among the battery cells in series, 103, a single battery cell voltage acquisition terminal, 104, a single battery cell temperature acquisition terminal, 105, an output connector, 200, a lower box, 210, a liquid outlet, 211, a pipeline outer wall, 212, a valve body, 213, a spring, 220, a liquid inlet, 230, a high-voltage connector, 240, a high-voltage connector, 250, a battery management unit, 260, copper bars, 270, a pressure relief valve, 271, a pressure relief valve shell, 272, a tetrafluoroethylene microporous membrane, 273, a pressure relief valve body, 280, an upper cover, 300, immersion liquid, 301, a water pump, 302, a cooler, 303, a liquid storage tank, 304, a hydraulic pump, 305, a heater, 306 and a flowmeter.
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 submerged cooling battery pack includes a lower case 200 and an upper cover 280, which themselves satisfy sealing performance of IP67 or more; a sealing strip or sealant for sealing is arranged between the lower box body 200 and the upper cover 280, and is fixed by a bolt, so that a sealing interface is ensured to reach a sealing grade above IP 67; the lower case 200 is provided with a liquid outlet 210, a liquid inlet 220, a high-voltage connector 230, a low-voltage connector 240 and a battery management unit 250 for judging whether thermal runaway occurs; the fixed position of the liquid inlet 220 is higher than the fixed position of the liquid outlet 210, so as to ensure that the low-temperature liquid is placed on the high-temperature liquid, thereby facilitating cold-heat exchange; the battery module is fixed in the lower case 200 by bolts, and the immersion liquid 300 is filled in the lower case; the battery modules are connected with the battery management unit 250 through a wire harness; the anode and the cathode of the battery module are connected with the anode and the cathode of the high-voltage connector 230 through a copper bar 260; the upper cover 280 is fixed with a pressure release valve 270 through bolts for exchanging gas between the inside and the outside of the battery pack; the liquid outlet 210 and the liquid inlet 220 are both provided with stop valves for preventing leakage of the immersion liquid 300 during maintenance.
As shown in fig. 3, the shut-off valve includes a pipe outer wall 211, a valve body 212 and a spring 213; the valve body 212 and the spring 213 are arranged inside the outer wall 211 of the pipeline; the valve body 212 is connected with the spring 213; the valve body 212 is provided with a sealing ring for sealing; after the external pipeline of the battery pack is inserted, the valve body 212 and the spring 213 are compressed, the water gap is opened, normal circulation of the immersion liquid 300 is guaranteed, when the subsequent maintenance is needed, the external pipeline is pulled out, the valve body 212 blocks the liquid outlet 210 and the liquid inlet 220 under the action of the spring 213, and leakage of the immersion liquid 300 during maintenance and replacement is avoided.
As shown in fig. 4, the battery module includes a plurality of unit cells 101 and inter-cell series copper bars 102 connecting the unit cells 101 in series; the inter-cell series copper bar 102 is provided with a single cell voltage acquisition terminal 103 and a single cell temperature acquisition terminal 104; an output connector 105 is further arranged on the copper bar 102 connected in series between the electric cores and used for converging collected voltage and temperature signals; the output connector 105 is connected to the battery management unit 250 through a wire harness, and is used for inputting the collected signals to the battery management unit 250.
As shown in fig. 5, the relief valve 270 includes a relief valve housing 271, a tetrafluoroethylene microporous membrane 272, and a relief valve body 273; the pressure relief valve body 273 is disposed within the pressure relief valve housing 271; the tetrafluoroethylene microporous membrane 272 is arranged in the pressure relief valve body 273; when the battery pack is used in a normal state, a tetrafluoroethylene (E-PTFE) microporous membrane 272 in the pressure relief valve 270 is used as a main waterproof breathable material, and gas is exchanged normally, so that the excessive pressure in the battery pack is avoided, the sealing of a box body is invalid, and the circulation of the immersion liquid 300 is facilitated; when the single cell 101 in the battery pack is out of control, the temperature in the pack is increased, and when the gas pressure is increased, the whole pressure relief valve 273 is pushed open by the gas pressure, so that pressure relief is completed.
As shown in FIG. 6, the immersion liquid 300 has a resistivity of greater than 1X10 14 An immersion liquid having an ohm-cm and a breakdown voltage greater than 30 kV/mm; the height of the immersion liquid 300 in the lower box 200 is higher than 80% of that of the battery module and lower than the upper cover 280, so that a certain air volume is ensured in the battery pack, circulation of the immersion liquid 300 is facilitated, and the temperature of the immersion liquid 300 is prevented from rising when the single battery cell 101 is out of control, so that the pressure in the battery pack is overlarge.
As shown in fig. 7, an energy storage cooling system for the submerged cooling battery pack includes a water pump 301, a cooler 302, a liquid storage tank 303, a hydraulic pump 304, a heater 305 and a flow meter 306 connected in sequence through pipelines; the water pump 301 is connected with the liquid outlet 210; the flowmeter 306 is connected with the liquid inlet 220; in the energy storage cooling system, battery packs (pack) can be connected in series according to the requirement, the immersion liquid 300 brings out the heat of the battery cells, the immersion liquid 300 is pumped out from the liquid outlet 210 by the water pump 301 and is conveyed to the cooler 302, and the immersion liquid 300 cooled by the cooler 302 is directly stored in the liquid storage tank 303; the hydraulic pump 304 pumps the immersion liquid 300 with lower temperature out of the liquid storage tank 303 and conveys the immersion liquid to the liquid inlet 220; the flowmeter 306 is used for controlling the flow rate of the liquid inlet; the heater 305 is used to heat the immersion liquid 300 under low temperature conditions; under normal working conditions, the optimal temperature of the battery monomer can be controlled by adjusting the flow according to the charge-discharge multiplying power of the energy storage cooling system; when the battery management unit 250 judges that thermal runaway occurs, the flow can be increased, and the battery pack can be cooled in time, so that the occurrence of thermal diffusion is avoided.
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. An immersed cooling battery pack, characterized in that the battery pack comprises a lower case (200) and an upper cover (280); the lower box body (200) and the upper cover (280) are fixed through bolts; the lower box body (200) is provided with a liquid outlet (210), a liquid inlet (220), a high-voltage connector (230), a high-voltage connector (240) and a battery management unit (250) for judging whether thermal runaway occurs; the fixed position of the liquid inlet (220) is higher than the fixed position of the liquid outlet (210); the battery module is fixed in the lower box body (200) through bolts, and immersed liquid (300) is filled in the lower box body; the battery module is connected with the battery management unit (250) through a wire harness; the anode and the cathode of the battery module are connected with the anode and the cathode of the high-voltage connector (230) through copper bars (260); the upper cover (280) is fixedly provided with a pressure release valve (270) for exchanging gas between the inside and the outside of the battery pack through bolts.
2. An immersion cooling battery pack according to claim 1, wherein a sealing strip or sealant for sealing is provided between the lower case (200) and the upper cover (280).
3. An immersion cooling battery pack according to claim 1, wherein the liquid outlet (210) and the liquid inlet (220) are provided with shut-off valves for preventing leakage of the immersion liquid (300) during maintenance.
4. A submerged cooling battery pack according to claim 3, wherein the shut-off valve comprises a pipe outer wall (211), a valve body (212) and a spring (213); the valve body (212) and the spring (213) are arranged inside the outer wall (211) of the pipeline; the valve body (212) is connected with the spring (213).
5. An immersion cooling battery pack according to claim 4, wherein the valve body (212) is provided with a sealing ring for sealing.
6. The immersed cooling battery pack according to claim 1, wherein the battery module comprises a plurality of unit cells (101) and inter-cell series copper bars (102) connecting the plurality of unit cells (101) in series; a single cell voltage acquisition terminal (103) and a single cell temperature acquisition terminal (104) are arranged on the copper bar (102) connected in series between the cells; an output connector (105) for converging collected voltage and temperature signals is further arranged on the copper bars (102) connected in series between the electric cores; the output connector (105) is connected with the battery management unit (250) through a wire harness.
7. The submerged cooling battery pack according to claim 1, wherein the pressure release valve (270) comprises a pressure release valve housing (271), a waterproof and breathable tetrafluoroethylene microporous membrane (272), and a pressure release valve body (273) for being pneumatically pushed open to release pressure; the pressure relief valve body (273) is arranged in the pressure relief valve shell (271); the tetrafluoroethylene microporous membrane (272) is arranged in the pressure relief valve body (273).
8. An immersion cooling battery pack according to claim 1, wherein the immersion liquid (300) has a resistivity of greater than 1X10 14 An immersion liquid having an ohm-cm and a breakdown voltage greater than 30 kV/mm.
9. The submerged cooling battery pack according to claim 1, wherein the submerged liquid (300) has a height in the lower case (200) higher than 80% of the battery module and lower than the upper cover (280).
10. An energy storage cooling system for an immersion cooling battery pack according to claim 1, characterized in that the energy storage cooling system comprises a water pump (301) for conveying immersion liquid (300), a cooler (302) for cooling the immersion liquid (300), a liquid storage tank (303) for storing the cooled immersion liquid (300), a hydraulic pump (304) for pumping the immersion liquid (300) from the liquid storage tank (303) and conveying the immersion liquid (300) to a liquid inlet (220), a heater (305) for heating the immersion liquid (300) under a low-temperature condition, and a flowmeter (306) for controlling the flow rate of the liquid inlet (220) which are connected in sequence through pipelines; the water pump (301) is connected with the liquid outlet (210); the flowmeter (306) is connected with the liquid inlet (220).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223539721.9U CN219832764U (en) | 2022-12-29 | 2022-12-29 | Immersed cooling battery pack and energy storage cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223539721.9U CN219832764U (en) | 2022-12-29 | 2022-12-29 | Immersed cooling battery pack and energy storage cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219832764U true CN219832764U (en) | 2023-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223539721.9U Active CN219832764U (en) | 2022-12-29 | 2022-12-29 | Immersed cooling battery pack and energy storage cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219832764U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220294074A1 (en) * | 2019-09-10 | 2022-09-15 | Vehicle Energy Japan Inc. | Battery Pack |
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2022
- 2022-12-29 CN CN202223539721.9U patent/CN219832764U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220294074A1 (en) * | 2019-09-10 | 2022-09-15 | Vehicle Energy Japan Inc. | Battery Pack |
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