CN220121927U - Phase-change liquid-cooling heat radiation structure of lithium battery module - Google Patents
Phase-change liquid-cooling heat radiation structure of lithium battery module Download PDFInfo
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- CN220121927U CN220121927U CN202320341602.8U CN202320341602U CN220121927U CN 220121927 U CN220121927 U CN 220121927U CN 202320341602 U CN202320341602 U CN 202320341602U CN 220121927 U CN220121927 U CN 220121927U
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- 238000001816 cooling Methods 0.000 title claims abstract description 80
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 27
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 230000005855 radiation Effects 0.000 title claims description 3
- 239000007788 liquid Substances 0.000 claims abstract description 70
- 230000017525 heat dissipation Effects 0.000 claims abstract description 25
- 150000002641 lithium Chemical class 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 7
- 239000004519 grease Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 238000004382 potting Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 48
- 238000012546 transfer Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 239000012808 vapor phase Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Abstract
The utility model discloses a phase-change liquid-cooling heat dissipation structure of a lithium battery module, which comprises one or more battery modules, a phase-change device and a liquid cooling plate; the battery module comprises a plurality of battery blocks, and the battery blocks are orderly arranged; the phase change device is arranged at the bottom and/or the top and/or the side part of the battery module and is used for radiating heat to the bottom and/or the top and/or the side part of the battery module through liquid cooling; the dimension of the phase change device exceeds the length or width of the battery module in length or width; the liquid cooling plate is contacted with the phase change device at one end of the phase change device, which is far away from the battery module, and a gap is reserved between the liquid cooling plate and the battery module. According to the utility model, the phase change device and the battery module are bonded for heat dissipation, so that the lithium batteries at different positions can be fully ensured to be uniform in temperature, the effective service life of the battery module and even the battery pack is prolonged, and the risk of thermal runaway caused by overhigh temperature of a single battery is avoided.
Description
Technical Field
The utility model relates to the field of phase-change heat dissipation of lithium batteries, in particular to a phase-change liquid-cooling heat dissipation structure of a lithium battery module.
Background
The power lithium battery is used as a core power source of the new energy automobile, and the endurance performance of the power lithium battery is improved continuously, and meanwhile, the safety and the stability are also attractive. Common heat dissipation modes of lithium batteries mainly comprise three types: air cooling, liquid cooling and phase change cooling. The liquid cooling heat dissipation is divided into direct contact liquid cooling and indirect contact liquid cooling when the main flow in the lower heat dissipation scheme is adopted, wherein the indirect contact type refers to that the cooling liquid flows in spaces such as a liquid cooling plate and the like, the temperature of the battery is controllable through the low temperature of the liquid cooling plate, and the battery is directly soaked in a non-conductive cooling medium for cooling. Along with the current lithium battery heat dissipation demand is bigger and bigger, the effective contact area of the liquid cooling plate and the lithium battery is bigger and bigger, the structural design of the liquid cooling plate also exposes more intensity defects, and once the liquid cooling plate working medium leaks, the occurrence of battery safety accidents is caused.
Disclosure of Invention
In order to maintain the liquid cooling heat exchange efficiency and better ensure the safety of a battery, the utility model provides a phase-change liquid cooling heat dissipation structure of a lithium battery module, which is used for carrying out heat transmission through a phase-change device so as to reduce the direct contact between a liquid cooling plate and the battery module. The phase change device utilizes the latent heat of internal working medium phase change to exchange heat, the liquid phase of the working medium is converted into the vapor phase to absorb a great amount of heat, so that the temperature of a hot end is reduced, the rapid diffusion of the vapor phase realizes the rapid uniform distribution of heat, the vapor phase is converted into the liquid phase through the non-heat source position or the ambient temperature, and the liquid is returned to a heat source area through the internal capillary liquid absorption core, so that a heat exchange cycle is formed. According to the utility model, the lithium battery module is used as a phase-change heat source, and heat is rapidly guided to the position of the external liquid cooling plate through the phase-change device, so that the heat exchange efficiency is hardly reduced, and the safety of battery cooling is improved.
In order to solve the technical problems, the utility model is realized by adopting the following technical scheme:
a phase-change liquid-cooling heat dissipation structure of a lithium battery module comprises one or more battery modules, a phase-change device and a liquid cooling plate;
the battery module comprises a plurality of battery blocks, and the battery blocks are orderly arranged;
the phase change device is arranged at the bottom and/or the top and/or the side part of the battery module and is used for radiating heat to the bottom and/or the top and/or the side part of the battery module through liquid cooling; the dimension of the phase change device exceeds the length or width of the battery module in length or width;
the liquid cooling plate is in contact with the phase change device, the specific contact position is located at one end, far away from the battery module, of the length or width of the phase change device, a gap is reserved between the liquid cooling plate and the battery module, and the liquid cooling plate is not in direct contact with the battery module, so that the safety of the battery module is guaranteed.
In the utility model, the phase change device can cover a plurality of battery modules at the same time, and a single battery module can be attached to a plurality of phase change devices which are orderly arranged. The single liquid cooling plate can cover a plurality of phase change devices simultaneously, and the single phase change device can also cooperate with a plurality of liquid cooling plates. The liquid cooling plates are connected in any form of series connection and parallel connection.
Preferably, the phase change device is a vapor chamber or a flattened heat pipe or a loop heat pipe or other devices with phase change heat transfer function after being packaged according to requirements.
Preferably, a heat conduction filling layer is arranged between the phase change device and the battery module and between the phase change device and the liquid cooling plate, the heat conduction filling layer needs to be fully extruded between the phase change device and the battery module and between the phase change device and the liquid cooling plate, the heat conduction filling layer is fully extruded to ensure that the phase change device is fully contacted with the battery module and the liquid cooling plate, and the heat transfer effect is improved.
Preferably, the heat-conducting filling layer is a heat-conducting silicone grease layer or a heat-conducting mud layer or a heat-conducting pouring sealant layer or other filling layers with heat-conducting properties.
Preferably, the length and width dimensions of the heat conducting filling layer are respectively consistent with the length and width dimensions of the battery module and the liquid cooling plate.
Preferably, the phase change device is bent at a position contacting the liquid cooling plate, and the liquid cooling plate is vertically arranged and then contacts the phase change device.
In the utility model, one end of the phase change device (such as the vapor chamber) far away from the battery module can be inserted into a water channel in the liquid cooling plate, one end of the phase change device is in direct contact with working medium of the liquid cooling plate, and sealing treatment is carried out at the joint of the phase change device and the liquid cooling plate shell by welding, sealant and other methods. In addition, the end part of the phase change device inserted into the water channel inside the liquid cooling plate is provided with a micro-processing structure so as to improve the heat exchange efficiency. The micro-processing structure comprises an expanding structure or a surface irregular structure and other structures which can increase the heat exchange efficiency.
Compared with the prior art, the utility model has the following beneficial effects:
the phase-change device and the battery module are attached to dissipate heat, so that the lithium battery at different positions can be fully guaranteed to be uniform and consistent in temperature, the effective service life of the battery module and even the battery pack is prolonged, and the danger of thermal runaway caused by overhigh temperature of a single battery is avoided.
The phase change device is used for conducting heat, the liquid cooling plate is effectively separated from the battery module, the safety of the battery module is effectively guaranteed on the premise that the heat exchange efficiency of the battery is hardly sacrificed, and dangerous accidents caused by short circuits are avoided.
In some embodiments, the design of heat and cold separation can enable the liquid cooling plate to be replaced by direct contact liquid cooling, so that heat dissipation resistance is reduced, and heat dissipation efficiency of the battery is improved more effectively.
Drawings
Fig. 1 is a schematic structural diagram of a phase-change liquid-cooled heat dissipation structure of a lithium battery module according to embodiment 1;
fig. 2 is an exploded view of a phase-change liquid-cooled heat dissipation structure of a lithium battery module according to embodiment 1;
fig. 3 is a schematic structural diagram of a phase-change liquid-cooled heat dissipation structure of a lithium battery module according to embodiment 2.
In the figure: the battery module 1, the phase change device 2, the liquid cooling plate 3, the heat conduction filling layer 4, junction 5.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings for a clear and intuitive understanding to those skilled in the art.
Example 1
The phase-change liquid-cooling heat dissipation structure of the lithium battery module is shown in fig. 1-2, and comprises a battery module 1, a phase-change device 2 and a liquid cooling plate 3;
the battery module 1-1 comprises a plurality of battery blocks, and the battery blocks are orderly arranged;
the phase change device 2 is arranged at the bottom of the battery module 1 and is used for radiating heat to the bottom of the battery module 1 through liquid cooling; the phase change device 2 is longer than the battery module 1 in length and is consistent in width;
the liquid cooling plate 3 contacts with the phase change device 2, the specific contact position is located at one end of the length phase change device 2 far away from the battery module 1, and a gap is reserved between the liquid cooling plate 3 and the battery module 1, so that the liquid cooling plate is not in direct contact with the battery module 1, and the safety of the battery module 1 is guaranteed.
In this embodiment, the phase change device 2 is a vapor chamber, and in other embodiments, the phase change device 2 may be a flattened heat pipe or a loop heat pipe or other packaged devices with a phase change heat transfer function that is satisfactory.
In addition, be provided with heat conduction filling layer 4 between phase change device 2 and battery module 1 and the liquid cooling board 3, heat conduction filling layer 4 need receive abundant extrusion between phase change device 2 and battery module 1 and liquid cooling board 3, and heat conduction filling layer 4 is fully extruded in order to guarantee that phase change device 2 fully contacts with battery module 1 and liquid cooling board 3, increases the heat transfer effect.
In this embodiment, the heat-conducting filling layer 4 is a heat-conducting silicone grease layer, and in other embodiments, the heat-conducting filling layer 4 may be a heat-conducting mud layer or a heat-conducting potting adhesive layer or other filling material layers with heat-conducting properties. And the length and width dimensions of the heat conduction filling layer 4 are respectively consistent with the length and width dimensions of the battery module 1 and the liquid cooling plate 3.
In some other embodiments, if the heat dissipation structure is installed in a changing environment, the phase change device 2 is bent at a position where the phase change device 2 contacts the liquid cooling plate 3, and the liquid cooling plate 3 is vertically arranged and then contacts the phase change device 2. The phase change device 2 after bending occupies smaller space in the horizontal direction, which is beneficial to the installation under different installation environments.
Example 2
As shown in fig. 3, this embodiment is different from embodiment 1 in that one end of the phase change device 2, which is far away from the battery module 1, is inserted into a water channel inside the liquid cooling plate 3, one end of the phase change device 2 is in direct contact with the working medium of the liquid cooling plate 3, and sealing treatment is performed at the joint 5 between the phase change device 2 and the liquid cooling plate 3 housing by welding, sealant, or the like. In addition, the end of the phase change device 2 inserted into the water channel inside the liquid cooling plate 3 has a micro-processing structure to improve heat exchange efficiency. The micro-processing structure comprises an expanding structure or a surface irregular structure and other structures which can increase the heat exchange efficiency. The micro-processing structure is not shown in the figures.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, such as the dimensions of the phase change device covering multiple battery modules simultaneously, or a single battery module being attached to multiple aligned phase change devices, or a single liquid cooling plate covering multiple phase change devices simultaneously, or a single phase change device being mated with multiple liquid cooling plates; the liquid cooling plates are connected in any form of series connection and parallel connection. The above modifications do not change the essence of the technical solution of the present utility model without having to go through the inventive work. Therefore, the present utility model is not limited to the embodiments described herein, and those skilled in the art, based on the present disclosure, should make improvements and modifications within the scope of the present utility model.
Claims (9)
1. The phase-change liquid-cooling heat dissipation structure of the lithium battery module is characterized by comprising one or more battery modules, a phase-change device and a liquid cooling plate;
the battery module comprises a plurality of battery blocks, and the battery blocks are orderly arranged;
the phase change device is arranged at the bottom and/or the top and/or the side part of the battery module and is used for radiating heat to the bottom and/or the top and/or the side part of the battery module through liquid cooling; the dimension of the phase change device exceeds the length or width of the battery module in length or width;
the liquid cooling plate is contacted with the phase change device at one end of the phase change device, which is far away from the battery module, and a gap is reserved between the liquid cooling plate and the battery module.
2. The phase-change liquid-cooled heat dissipation structure of a lithium battery module according to claim 1, wherein the phase-change device is a vapor chamber or a flattened heat pipe or a loop heat pipe.
3. The phase-change liquid-cooled heat dissipation structure of a lithium battery module according to claim 1, wherein a heat-conducting filling layer is arranged between the phase-change device and the battery module and between the phase-change device and the liquid cooling plate.
4. The phase-change liquid-cooled heat dissipation structure of a lithium battery module according to claim 3, wherein the heat-conducting filling layer is a heat-conducting silicone grease layer, a heat-conducting mud layer or a heat-conducting potting adhesive layer.
5. The phase-change liquid-cooled heat dissipation structure of a lithium battery module according to claim 3 or 4, wherein the length-width dimensions of the heat-conducting filling layer are respectively consistent with the length-width dimensions of the battery module and the liquid cooling plate.
6. The phase-change liquid-cooled heat dissipation structure of a lithium battery module according to claim 1, wherein the phase-change device is bent at a position contacting with a liquid cooling plate, and the liquid cooling plate is vertically arranged and then contacts with the phase-change device.
7. The lithium battery module phase-change liquid-cooling heat radiation structure according to claim 1, wherein one end of the phase-change device far away from the battery module is inserted into a water channel inside the liquid cooling plate, one end of the phase-change device is in direct contact with a working medium of the liquid cooling plate, and sealing treatment is carried out at a joint of the phase-change device and a shell of the liquid cooling plate.
8. The phase-change liquid-cooled heat dissipation structure of claim 7, wherein the end of the phase-change device inserted into the water channel inside the liquid-cooled plate has a micro-processing structure.
9. The lithium battery module phase-change liquid-cooled heat dissipation structure of claim 8, wherein the micro-processing structure comprises an expanding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320341602.8U CN220121927U (en) | 2023-02-28 | 2023-02-28 | Phase-change liquid-cooling heat radiation structure of lithium battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320341602.8U CN220121927U (en) | 2023-02-28 | 2023-02-28 | Phase-change liquid-cooling heat radiation structure of lithium battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220121927U true CN220121927U (en) | 2023-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320341602.8U Active CN220121927U (en) | 2023-02-28 | 2023-02-28 | Phase-change liquid-cooling heat radiation structure of lithium battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220121927U (en) |
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2023
- 2023-02-28 CN CN202320341602.8U patent/CN220121927U/en active Active
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