CN212625771U - Battery heat dissipation liquid cooling device and battery pack - Google Patents

Battery heat dissipation liquid cooling device and battery pack Download PDF

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Publication number
CN212625771U
CN212625771U CN202021378710.5U CN202021378710U CN212625771U CN 212625771 U CN212625771 U CN 212625771U CN 202021378710 U CN202021378710 U CN 202021378710U CN 212625771 U CN212625771 U CN 212625771U
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battery
liquid cooling
liquid
cooling
wall
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刘华俊
阎明瀚
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Hubei Eve Power Co Ltd
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Hubei Eve Power Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Abstract

The utility model discloses a battery heat dissipation liquid cooling plant and battery package belongs to power battery technical field. The battery heat dissipation liquid cooling device is arranged on the outer wall of a bottom plate of the battery module, a boss protruding outwards is arranged on the outer wall of the bottom plate, and the battery heat dissipation liquid cooling device comprises a liquid cooling plate unit and a heat conduction filler; the liquid cooling plate unit and the outer wall of the bottom plate are arranged at intervals, a groove is formed in the upper surface, close to the outer wall of the bottom plate, of the liquid cooling plate unit, and the groove is matched with the boss; the heat conducting filler is filled between the outer wall of the bottom plate and the upper surface. The battery pack comprises the battery heat dissipation liquid cooling device. The utility model discloses a battery cooling liquid cooling device and battery package through set up the recess on the upper surface at liquid cooling board unit, reduces the packing volume of heat conduction filler to reduce the thermal resistance, and then improved the cooling performance of battery cooling liquid cooling device and battery package.

Description

Battery heat dissipation liquid cooling device and battery pack
Technical Field
The utility model relates to a power battery technical field especially relates to a battery heat dissipation liquid cooling device and battery package.
Background
With the development of electric vehicles, the problems of service life and capacity attenuation of power batteries are emphasized. The research finds that the temperature difference and the temperature rise amplitude have close relationship. The power battery can produce a large amount of heats at the during operation, if this heat can not in time be discharged, will make the temperature in the power battery constantly rise, cause its inside temperature difference to increase gradually, and finally the power battery will be in the operational environment of big difference in temperature, influences power battery's life. If the temperature of the working environment is high, if the effective heat dissipation management can not be carried out on the power battery in time, the final working temperature of the power battery is far higher than the reasonable working temperature of the power battery, so that the service life and the battery capacity of the power battery are seriously influenced, and meanwhile, the discharge performance of the power battery is greatly interfered.
The liquid cooling plate cooling technology is a copper/aluminum plate which is internally provided with a flow channel for a liquid cooling medium to flow and is in contact with a heating element to absorb heat. It is also necessary to construct a closed circulation path of the cooling medium including the reservoir, the pump, the cold plate, and the heat exchanger to continuously remove heat from the heating element in contact with the cold plate when installed.
Among the prior art, the battery module is installed on the liquid cold plate, dispels the heat to the battery module through the liquid cold plate, and liquid cold plate and battery module still fill usually have heat-conducting piece to make liquid cold plate and battery module fully contact, be convenient for transmit the heat of battery module for the liquid cold plate through heat-conducting piece, cool down the battery module. However, the upper surface of the liquid cooling plate contacting the battery module is a plane, and under the condition that the bottom surface of the module is uneven, the volume and the mass of the filler in the middle of the module and the cold plate are large, so that the thermal resistance is high, the temperature of the battery module is slow, and the heat dissipation and cooling effects are poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery heat dissipation liquid cooling plant reduces the thermal resistance, improves the cooling performance.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a battery heat dissipation liquid cooling plant, its installs on the bottom plate outer wall of battery module, is provided with outside bellied boss on the bottom plate outer wall, and battery heat dissipation liquid cooling plant includes:
the liquid cooling plate unit is arranged at an interval with the outer wall of the bottom plate, a groove is formed in the upper surface, close to the outer wall of the bottom plate, of the liquid cooling plate unit, and the groove is matched with the boss;
and the heat conducting filler is filled between the outer wall and the upper surface of the bottom plate.
Optionally, the boss includes a plurality of bosses, and the groove includes a plurality of undercuts respectively mating with the plurality of bosses.
Optionally, an annular groove is further formed in the upper surface, close to the outer wall of the bottom plate, of the liquid cooling plate unit, and the annular groove is formed in the circumferential direction of the battery module.
Optionally, the annular groove is communicated with the groove; and/or the depth of the annular groove is not less than the depth of the groove.
Optionally, install a plurality of battery modules on the liquid cooling board unit, be provided with a plurality of ring channels on the upper surface that the liquid cooling board unit is close to the bottom plate outer wall, a plurality of ring channels intercommunication sets up.
Optionally, the liquid cooling plate unit comprises an upper cooling plate, a lower cooling plate and cooling liquid, the cooling liquid is filled in an enclosed space formed by the upper cooling plate and the lower cooling plate, and a liquid inlet and a liquid outlet communicated with the enclosed space are formed in the lower cooling plate.
Optionally, a plurality of communicated channels are arranged on the lower cooling plate, and the plurality of channels are communicated with the liquid inlet and the liquid outlet.
Optionally, the upper and lower cold plates are both metal plates.
Optionally, the thermally conductive filler is a thermally conductive glue.
Another object of the utility model is to provide a battery pack improves the heat dissipation cooling effect.
To achieve the purpose, the utility model adopts the following technical proposal:
a battery pack comprises the battery heat dissipation liquid cooling device.
The utility model has the advantages that:
the utility model provides a pair of battery heat dissipation liquid cooling plant, set up through liquid cooling board unit and bottom plate outer wall interval, the recess of liquid cooling board unit upper surface cooperatees with the boss of bottom plate outer wall to reduce the clearance between upper surface and the bottom plate outer wall, heat conduction filler is filled between recess and boss, the filling space of heat conduction filler has been reduced, thereby the packing volume of heat conduction filler has been reduced, the volume and the quality of heat conduction filler have been reduced, and then the thermal resistance of heat conduction filler has been reduced, the cooling performance of battery heat dissipation liquid cooling plant has been improved; the structural characteristics of the outer wall of the bottom plate are fully utilized, and the combination of groove structure design and filling assembly mode is adopted, so that the battery cooling liquid is simple in structure, and the cooling performance is improved.
The utility model provides a pair of battery package through adopting foretell battery heat dissipation liquid cooling plant, has improved the heat dissipation cooling effect of battery package.
Drawings
Fig. 1 is a schematic structural diagram of a battery module provided in the prior art, which is mounted on a battery heat dissipation liquid cooling device;
fig. 2 is a schematic structural view of a battery module provided in the prior art;
fig. 3 is a cross-sectional view of a battery module according to an embodiment of the present invention mounted on a battery cooling device;
FIG. 4 is an enlarged view at A of FIG. 3;
fig. 5 is a schematic structural diagram of an upper cooling plate according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a lower cooling plate according to an embodiment of the present invention.
In the figure:
100-a battery module; 101-a floor outer wall; 1011-boss;
1-a liquid cold plate unit; 11-upper cold plate; 111-grooves; 112-an annular groove; 12-cold plate down; 121-channel; 13-cooling liquid; 14-a liquid inlet pipe; 15-a liquid outlet pipe;
2-thermally conductive filler.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the prior art, as shown in fig. 1, the outer wall 101 of the bottom plate of the battery module 100 is installed on a liquid cooling plate, the battery module 100 is cooled by the liquid cooling plate, and generally, the liquid cooling plate and the outer wall 101 of the bottom plate are filled with a heat conducting member, so that the liquid cooling plate is in full contact with the outer wall 101 of the bottom plate, the heat of the battery module 100 is conveniently transferred to the liquid cooling plate through the heat conducting member, and the battery module 100 is cooled. However, as shown in fig. 2, the outer wall 101 of the bottom plate is provided with a convex boss 1011, the upper surface of the liquid cooling plate contacting the battery module 100 is a plane, and when the bottom surface of the module is uneven, the volume of the filling material between the module and the cooling plate is large, which results in high thermal resistance, slow cooling of the battery module 100, and poor heat dissipation and cooling effects.
In order to solve the above problem, the present embodiment provides a battery-cooling liquid cooling apparatus, as shown in fig. 3 and 4, which includes a liquid cooling plate unit 1 and a heat conductive filler 2. Specifically, the liquid cooling plate unit 1 and the outer wall 101 of the bottom plate are arranged at intervals, a groove 111 is formed in the upper surface, close to the outer wall 101 of the bottom plate, of the liquid cooling plate unit 1, and the groove 111 is matched with the boss 1011; the heat conductive filler 2 is filled between the soleplate outer wall 101 and the upper surface.
The liquid cooling plate unit 1 and the bottom plate outer wall 101 are arranged at intervals, and the heat conducting filler 2 is filled between the bottom plate outer wall 101 and the upper surface and is used for heat conduction between the battery module 100 and the liquid cooling plate unit 1 so as to improve the cooling performance of the battery module 100; in order to avoid the problem that the volume and the mass of the middle filler are large due to the fact that the upper surface of the liquid cooling plate unit 1, which is in contact with the battery module 100, is a plane in the traditional structure, the groove 111 on the upper surface of the liquid cooling plate unit 1 is matched with the boss 1011 of the outer wall 101 of the base plate so as to reduce the gap between the upper surface and the outer wall 101 of the base plate, the heat-conducting filler 2 is filled between the groove 111 and the boss 1011, and the filling space of the heat-conducting filler 2 is reduced, so that the filling amount of the heat-conducting filler 2 is reduced, the volume and the mass of the heat-conducting filler 2 are reduced, the thermal resistance of the heat-conducting filler 2 is further reduced, and the cooling; the structural characteristics of the outer wall 101 of the bottom plate are fully utilized, and the structural design of the groove 111 and the filling and assembling mode are combined, so that the battery cooling liquid is simple in structure, and the cooling performance is improved. Wherein, the filling height of the heat conductive filler 2 is the difference between the depth of the groove 111 and the height of the boss 1011.
Optionally, the boss 1011 includes a plurality of convex portions, the groove 111 includes a plurality of concave portions, the plurality of concave portions are respectively matched with the plurality of convex portions, and the convex portions and the concave portions are arranged in a one-to-one correspondence, so that the size of the gap between the upper surface and the outer wall 101 of the bottom plate is further reduced, and the thermal resistance is reduced; referring to fig. 2 and 3, in the present embodiment, a plurality of protruding portions are arranged in parallel at intervals, and include a protruding portion arranged in the middle of the outer wall 101 of the bottom plate and protruding portions arranged at both ends of the outer wall 101 of the bottom plate, accordingly, as shown in fig. 5, the concave portion is provided with a concave portion in the middle and concave portions at both ends respectively corresponding to the protruding portions, and different grooves 111 are arranged according to different outer walls 101 of the bottom plate to reduce thermal resistance and improve heat dissipation performance.
When the heat conductive filler 2 is filled between the bottom plate outer wall 101 and the upper surface of the liquid cooling plate unit 1, the heat conductive filler 2 overflows to affect the appearance. In order to solve the above problem, optionally, with continued reference to fig. 5, an annular groove 112 is further provided on the upper surface of the liquid cooling plate unit 1 close to the bottom plate outer wall 101, and the annular groove 112 is provided along the circumferential direction of the battery module 100, so that the excessive heat conductive filler 2 overflows into the annular groove 112, thereby improving the appearance of the installation of the battery module 100 and the liquid cooling plate unit 1. Further alternatively, the annular groove 112 is provided in communication with the groove 111 so that the heat conductive filler 2 flows from within the groove 111 into the annular groove 112.
Further optionally, the depth of the annular groove 112 is not less than the depth of the groove 111, so that the heat-conducting filler 2 flows into the annular groove 112 from the inside of the groove 111, and the heat-conducting filler 2 is prevented from accumulating between the outer wall 101 of the bottom plate and the upper surface of the liquid cooling plate unit 1 and affecting the heat-conducting performance.
Referring to fig. 4 and 6, in the present embodiment, the liquid-cooled plate unit 1 further includes an upper cold plate 11, a lower cold plate 12 and a cooling liquid 13, the cooling liquid 13 is filled in a closed space formed by the upper cold plate 11 and the lower cold plate 12, and the heat generated by the battery module 100 is taken away by the flowing cooling liquid 13, so as to achieve the purpose of heat dissipation; the lower cooling plate 12 is provided with a liquid inlet and a liquid outlet which are communicated with the closed space, so that the cooling liquid 13 can circulate between the closed space and the outside. Specifically, the liquid inlet and the liquid outlet are respectively provided with a liquid inlet pipe 14 and a liquid outlet pipe 15, so that the lower cooling plate 12 is communicated with an external cooling device, and the circulation of the cooling liquid 13 is facilitated.
Referring to fig. 6, optionally, a plurality of communicated channels 121 are disposed on the lower cooling plate 12, the channels 121 on the lower cooling plate 12 and the upper cooling plate 11 form a closed space, so that the cooling liquid 13 circulates along the channels 121 in the closed space, and the plurality of channels 121 are all communicated with the liquid inlet and the liquid outlet, so as to improve the flowability, and further improve the heat dissipation efficiency.
Because the metal material has better heat dissipation performance, optionally, the upper cold plate 11 and the lower cold plate 12 are both metal plates, that is, the upper cold plate 11 is made of the metal material, so that the heat conduction performance of the upper cold plate 11 to the heat conduction member is improved; the lower cold plate 12 is made of a metal material, so that the heat dissipation performance of the lower cold plate 12 to the cooling liquid 13 is improved.
The heat-conducting glue is a heat-conducting room-temperature curing organic silicon bonding sealant. The low molecular weight is released by condensation reaction of water in the air to cause crosslinking and curing, and the high-performance elastomer is vulcanized. Alternatively, the thermally conductive filler 2 is made of thermally conductive glue; the heat-conducting adhesive has excellent cold and heat alternation resistance, aging resistance and electrical insulation performance, so that the service life of the battery heat-dissipating liquid cooling device can be prolonged; the battery cooling liquid cooling device has excellent moisture resistance, shock resistance, corona resistance, electric leakage resistance and chemical medium resistance, and the use safety of the battery cooling liquid cooling device is improved; the heat-conducting glue is not swelled and has good adhesion to most of metal and non-metal materials, so that the battery heat-dissipating liquid cooling device is easy to assemble and has a more stable structure.
The embodiment also provides a battery pack which comprises the battery heat-dissipation liquid cooling device so as to improve the heat-dissipation cooling effect of the battery pack. Optionally, a plurality of battery modules 100 are arranged on the battery cooling device, the plurality of battery modules 100 are mounted on the liquid cooling plate unit 1, a plurality of annular grooves 112 are formed in the upper surface, close to the bottom plate outer wall 101, of the liquid cooling plate unit 1, the plurality of annular grooves 112 are communicated with one another, and the plurality of annular grooves 112 are prevented from being arranged independently, so that the upper cooling plate 11 can be processed conveniently.
Optionally, the manufacturing process of the battery heat dissipation liquid cooling device includes the following steps:
s1, processing the groove 111 and the annular groove 112 of the upper cold plate 11 according to the size of the boss 1011 of the outer wall 101 of the bottom plate;
s2, processing the lower cold plate 12 according to the cooling requirement, and installing the upper cold plate 11 and the lower cold plate 12;
s3, assembling the assembled upper cold plate 11 and the assembled lower cold plate 12 on the battery module 100;
and S4, filling the heat conducting filler 2 between the upper surface of the liquid cooling plate unit 1 and the outer wall 101 of the bottom plate.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a battery heat dissipation liquid cooling plant, its installs on bottom plate outer wall (101) of battery module (100), be provided with outside bellied boss (1011) on bottom plate outer wall (101), its characterized in that, battery heat dissipation liquid cooling plant includes:
the liquid cooling plate unit (1) is arranged at an interval with the outer wall (101) of the bottom plate, a groove (111) is formed in the upper surface, close to the outer wall (101) of the bottom plate, of the liquid cooling plate unit (1), and the groove (111) is matched with the boss (1011);
and the heat-conducting filler (2) is filled between the outer wall (101) of the bottom plate and the upper surface.
2. The battery-powered hydrocooling apparatus of claim 1, wherein the boss (1011) comprises a plurality of protrusions and the recess (111) comprises a plurality of depressions that respectively engage the plurality of protrusions.
3. The battery cooling device according to claim 1, wherein an annular groove (112) is further provided on the upper surface of the liquid cooling plate unit (1) near the bottom plate outer wall (101), and the annular groove (112) is provided along the circumferential direction of the battery module (100).
4. The battery hydrocooling device of claim 3, wherein the annular groove (112) is provided in communication with the recess (111);
and/or the depth of the annular groove (112) is not less than the depth of the groove (111).
5. The battery cooling device according to claim 3, wherein a plurality of battery modules (100) are mounted on the liquid cooling plate unit (1), a plurality of annular grooves (112) are formed in the upper surface of the liquid cooling plate unit (1) close to the outer wall (101) of the bottom plate, and the plurality of annular grooves (112) are communicated with each other.
6. The battery radiating liquid cooling device according to any one of claims 1-5, wherein the liquid cooling plate unit (1) comprises an upper cooling plate (11), a lower cooling plate (12) and a cooling liquid (13), the cooling liquid (13) is filled in a closed space formed by the upper cooling plate (11) and the lower cooling plate (12), and a liquid inlet and a liquid outlet which are communicated with the closed space are arranged on the lower cooling plate (12).
7. The battery cooling device according to claim 6, wherein the lower cooling plate (12) is provided with a plurality of communicating channels (121), the channels (121) and the upper cooling plate (11) form the closed space, and the plurality of channels (121) are communicated with the liquid inlet and the liquid outlet.
8. The battery hydrocooling device of claim 6, wherein the upper cold plate (11) and the lower cold plate (12) are both metal plates.
9. The battery hydrocooling device of any one of claims 1-5, wherein the thermally conductive filler (2) is a thermally conductive glue.
10. A battery pack comprising the battery heat sink fluid cooling device of any one of claims 1-9.
CN202021378710.5U 2020-07-14 2020-07-14 Battery heat dissipation liquid cooling device and battery pack Active CN212625771U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113224415A (en) * 2021-04-14 2021-08-06 浙江零跑科技股份有限公司 Liquid cooling board and battery package
CN113793998A (en) * 2021-08-04 2021-12-14 岚图汽车科技有限公司 Battery heat dissipation system and battery heat dissipation method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113224415A (en) * 2021-04-14 2021-08-06 浙江零跑科技股份有限公司 Liquid cooling board and battery package
CN113793998A (en) * 2021-08-04 2021-12-14 岚图汽车科技有限公司 Battery heat dissipation system and battery heat dissipation method

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