CN220963490U - Module structure suitable for phase change cooling and liquid cooling combination of square battery cell - Google Patents
Module structure suitable for phase change cooling and liquid cooling combination of square battery cell Download PDFInfo
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- CN220963490U CN220963490U CN202322683819.XU CN202322683819U CN220963490U CN 220963490 U CN220963490 U CN 220963490U CN 202322683819 U CN202322683819 U CN 202322683819U CN 220963490 U CN220963490 U CN 220963490U
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- 239000007788 liquid Substances 0.000 title claims abstract description 140
- 238000001816 cooling Methods 0.000 title claims abstract description 100
- 239000012782 phase change material Substances 0.000 claims abstract description 107
- 239000000110 cooling liquid Substances 0.000 claims abstract description 19
- 239000011257 shell material Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 239000002826 coolant Substances 0.000 abstract description 3
- 239000012071 phase Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model discloses a module structure suitable for phase change cooling and liquid cooling combination of a square battery cell, which comprises a battery box, the square battery cell, a liquid cooling plate, a phase change material plate, a liquid cooling pipe and a liquid supply assembly, wherein the battery box is arranged on the square battery cell; the square battery cells are stacked and distributed in the battery box in N layers, and the large side surface of each square battery cell is a stacking surface; the liquid cooling plate is arranged on the outer side surface of the N layers of square battery cores; a phase change material plate is respectively arranged on the top surface and the bottom surface of each layer of square battery core, and a plurality of liquid cooling pipes are uniformly distributed in each phase change material plate; the liquid supply assembly comprises a liquid supply main pipe I and a liquid supply main pipe II; the liquid supply main pipe is used for supplying cooling liquid to the liquid cooling plate; the second liquid supply main pipe is used for supplying cooling liquid to each liquid cooling pipe, and an electromagnetic valve is arranged on the second liquid supply main pipe. On one hand, square battery core temperature is taken away by cooling liquid in a liquid cooling plate; on the other hand takes away square electric core temperature through phase change material, and square electric core temperature is taken away to the coolant liquid in the liquid cooling pipe, realizes the cooling function of battery package jointly.
Description
Technical Field
The utility model relates to a battery thermal management system, in particular to a module structure suitable for phase change cooling and liquid cooling combination of square battery cells.
Background
At present, a common cooling mode of the battery thermal management system is natural cooling and liquid cooling. With the popularization of the fast charging technology, higher requirements are put on battery pack thermal management. In the process of working in a high-temperature environment, the temperature rising speed of the battery is high, and if heat cannot be taken away in time, the safety of the battery pack can be influenced. The battery is cooled by the liquid cooling plate, so that the cooling requirement of the battery pack under severe working conditions can not be met.
Disclosure of utility model
The utility model aims at solving the technical problems of the prior art, and provides a module structure suitable for combining phase-change cooling and liquid cooling of square battery cells, which can take away the temperature of the square battery cells through cooling liquid in a liquid cooling plate; on the other hand takes away square electric core temperature through phase change material, and square electric core temperature is taken away to the coolant liquid in the liquid cooling pipe, realizes the cooling function of battery package jointly.
The large surface of the battery core is filled with a phase change material, and a liquid cooling pipe is arranged in the phase change material. And heating in the working process of the battery cells, absorbing the temperature of the battery cells by the phase change material filled between the battery cells, and taking away the heat of the phase change material by the cooling liquid in the liquid cooling pipe to finish the cooling process of the battery pack. The patent adopts solid-liquid phase change material, and the working principle is as follows: when the ambient temperature is higher than the phase transition temperature, the material is converted from a solid state to a liquid state and absorbs heat; and when the ambient temperature is lower than the phase change point, the material is converted from a liquid state to a solid state to release heat.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a module structure that phase transition cooling and liquid cooling combine together suitable for square electric core, includes battery box, square electric core, liquid cooling board, phase change material board, liquid cooling pipe and feed liquid subassembly.
The square battery cells are stacked and distributed in the battery box in N layers, and the large side surface of each square battery cell is a stacking surface; wherein; n is more than or equal to 1.
The liquid cooling plate is arranged on the outer side wall surface of the N layers of square battery cells and along the length direction of the battery box.
And the top surface and the bottom surface of each layer of square battery core are respectively provided with a phase change material plate, a plurality of liquid cooling pipes are uniformly distributed in each phase change material plate, and each liquid cooling pipe is arranged along the length direction of the battery box.
The liquid supply assembly can provide cooling liquid to the liquid cooling plate and each liquid cooling pipe.
The liquid supply assembly comprises a liquid supply main pipe I and a liquid supply main pipe II.
The liquid supply main pipe is used for supplying cooling liquid to the liquid cooling plate.
The second liquid supply main pipe is used for supplying cooling liquid to each liquid cooling pipe, and an electromagnetic valve is arranged on the second liquid supply main pipe.
When N is more than 1, the phase change material plate comprises a top phase change material plate, a middle phase change material plate and a bottom phase change material plate; the top phase change material plate is positioned at the top of the topmost square battery cell, and the bottom phase change material plate is positioned at the bottom of the bottommost square battery cell; the middle phase change material plate is positioned between two adjacent layers of square electric cores; the thicknesses of the top phase change material plate and the bottom phase change material plate are the same, and are H 1; the thickness of the intermediate phase change material plate is H 0, H 0＞H1.
H1＝2/3H0。
And a liquid flow pipe is arranged in the middle phase change material plate, b liquid flow pipes are arranged in the top phase change material plate and the bottom phase change material plate, and a is more than b.
a＝b+1。
The diameter of each liquid flow tube in the middle phase change material plate is D 0, and the diameter of each liquid flow tube in the top phase change material plate and the bottom phase change material plate is D 1, then D 0＝2/3H0,D1＝2/3H1.
The calculation formula of the total thickness H of all layers of phase change material plates is as follows:
wherein Q c is the total heat generated by all layers of square battery cells;
q 1 is the total heat which can be taken away by the liquid flow plate;
c is the specific heat capacity of the phase change material in the phase change material plate;
ρ is the density of the phase change material in the phase change material plate;
l and W are the length and width of the phase change material plate respectively;
Delta T max is the maximum difference between the highest temperature of the square battery cell and the set allowable temperature.
The phase change material plate comprises a square shell and phase change materials filled in the square shell; the square shell is made of aluminum shell, and the phase change material is a mixed material of paraffin and expanded graphite.
The square battery cell temperature measuring assembly is used for monitoring the temperature of the square battery cell; the square cell temperature measuring assembly is connected with the electromagnetic valve.
Two adjacent square battery cells in each layer of square battery cells are electrically connected through the pole piece.
The utility model has the following beneficial effects:
1. In the application, a phase change material is arranged at the large surface position of a square battery cell, and a liquid cooling tube is arranged in the phase change material. The square battery cell heats in the working process, on one hand, the cooling liquid in the liquid cooling plate takes away the temperature of the square battery cell; in addition, the phase change material takes away square electric core temperature, and the square electric core temperature is taken away to the coolant liquid in the liquid cooling pipe, realizes the cooling function of battery package jointly.
2. According to the application, the liquid cooling pipe is arranged in the phase change material, so that the structural strength of the module is improved.
3. The application adopts solid-liquid phase change material, and the working principle is as follows: when the ambient temperature is higher than the phase transition temperature, the material is converted from a solid state to a liquid state and absorbs heat; and when the ambient temperature is lower than the phase change point, the material is converted from a liquid state to a solid state to release heat.
Drawings
Fig. 1 shows a general structural diagram of a module structure combining phase change cooling and liquid cooling for square cells according to the present application.
Fig. 2 is a schematic diagram showing a structure of the module structure of the present application without the battery case.
Fig. 3 shows an enlarged schematic view of the square frame area in fig. 2.
Fig. 4 shows a schematic flow path of the cooling liquid provided by the liquid supply assembly.
The method comprises the following steps:
10. a battery box; 11. a case; 12. a case cover;
20. a square cell; 21. a pole piece;
30. A liquid cooling plate;
40. a phase change material plate; 41. a top phase change material plate; 42. an intermediate phase change material plate; 43. a bottom phase change material plate;
50. A liquid-cooled tube; 51. a top liquid-cooled tube; 52. an intermediate liquid-cooled tube; 53. a bottom liquid-cooled tube;
60. A liquid supply assembly; 61. a liquid supply main pipe I; 62. a liquid supply main pipe II; 63. a liquid supply branch pipe; 64. a liquid outlet main pipe; 65. and a liquid outlet branch pipe.
Detailed Description
The utility model will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present utility model, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present utility model. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present utility model.
As shown in fig. 1 and fig. 2, a module structure suitable for combining phase change cooling and liquid cooling of a square battery cell includes a battery box 10, a square battery cell 20, a liquid cooling plate 30, a phase change material plate 40, a liquid cooling tube 50, a liquid supply assembly 60 and a square battery cell temperature measuring assembly.
The battery box comprises a box body 11 and a box cover 12 covered on the top of the box body.
The square battery cells are stacked and distributed in the battery box in N layers, and the large side surface of each square battery cell is a stacking surface; wherein; n is more than or equal to 1.
Two adjacent square battery cells in each layer of square battery cells are electrically connected through the pole piece 21, so that smooth circulation of current is ensured.
The liquid cooling plate is arranged on the outer side wall surface of the N layers of square battery cells and along the length direction of the battery box.
A phase change material plate 40 is respectively arranged on the top surface and the bottom surface of each layer of square battery core, a plurality of liquid cooling pipes are uniformly distributed in each phase change material plate, and each liquid cooling pipe is arranged along the length direction of the battery box.
When n=1, the phase change material plates include only the top phase change material plate 41 and the bottom phase change material plate 43.
When N > 1, the phase change material plates include a top phase change material plate 41, a middle phase change material plate 42, and a bottom phase change material plate 43; the top phase change material plate is positioned at the top of the topmost square battery cell, and the bottom phase change material plate is positioned at the bottom of the bottommost square battery cell; the middle phase change material plate is positioned between two adjacent layers of square electric cores; the thicknesses of the top phase change material plate and the bottom phase change material plate are the same, and are H 1; the thickness of the intermediate phase change material plate is H 0, H 0＞H1, and more preferably H 1＝2/3H0.
The calculation formula of the total thickness H of all layers of phase change material plates is as follows:
wherein Q c is the total heat generated by all layers of square battery cells;
q 1 is the total heat which can be taken away by the liquid flow plate;
c is the specific heat capacity of the phase change material in the phase change material plate;
ρ is the density of the phase change material in the phase change material plate;
l and W are the length and width of the phase change material plate respectively;
Delta T max is the maximum difference between the highest temperature of the square battery cell and the set allowable temperature.
When n=1, h=2h 1; when n=2, h=2h 1+H0; and so on.
If the middle phase change material plate is provided with a liquid flow pipe and the top phase change material plate and the bottom phase change material plate are provided with b liquid flow pipes, a is larger than b, and more preferably a=b+1.
The diameter of each flow tube in the middle phase change material plate (i.e., middle flow tube 52) is D 0, and the diameter of each flow tube in the top phase change material plate (i.e., top flow tube 51) and each flow tube in the bottom phase change material plate (i.e., bottom flow tube 53) is D 1, then D 0＝2/3H0,D1＝2/3H1.
According to the application, the arrangement mode of the intermediate phase change material plate and the liquid flow pipe can enable the heat of the square battery core to be taken away in a short time during quick charge, and the cooling speed is high.
The phase change material plate comprises a square shell and phase change materials filled in the square shell; the square shell is made of aluminum shell, and the phase change material is a mixed material of paraffin and expanded graphite.
The liquid supply assembly can provide cooling liquid for the liquid cooling plate and each liquid cooling pipe.
As shown in fig. 3 and 4, the liquid supply assembly includes a first liquid supply main 61, a second liquid supply main 62, a liquid supply branch 63, a liquid outlet main 64, and a liquid outlet branch 65.
The liquid supply main pipe is directly communicated with the liquid cooling plate and is used for supplying cooling liquid to the liquid cooling plate.
The second liquid supply pipe is used for providing cooling liquid for each liquid cooling pipe, one end of the second liquid supply pipe is connected with the first liquid supply pipe through the electromagnetic valve 621, and the other end of the second liquid supply pipe is connected with the liquid inlet of the corresponding liquid cooling pipe through the plurality of liquid supply branch pipes 63 and the plurality of pipe joints.
The outlet of each liquid cooling pipe is directly connected with the liquid outlet main pipe 64 or is connected with the liquid outlet main pipe 64 through a liquid outlet branch pipe 65.
The square battery cell temperature measuring component is used for monitoring the temperature of the square battery cell; the square cell temperature measuring assembly is connected with the electromagnetic valve, and the opening and closing of the electromagnetic valve are controlled through the temperature sensing of the battery pack.
When the liquid cooling plate and the phase change material plate cannot meet the requirement on cooling the battery pack, the electromagnetic valve is opened or regulated, the flow of cooling liquid in the liquid cooling pipe is increased, and the regulation and control on the temperature of the battery pack are completed. The whole cooling process is divided into two parts, wherein the first part takes away the square battery cell temperature for the cooling liquid in the liquid cooling plate, the second part takes away the square battery cell temperature for the phase change material, and the cooling liquid in the liquid cooling pipe takes away the square battery cell temperature, so that the cooling function of the battery pack is realized together.
The preferred embodiments of the present utility model have been described in detail above, but the present utility model is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the equivalent changes belong to the protection scope of the present utility model.
Claims (10)
1. Phase change cooling and liquid cooling combined module structure suitable for square electric core, its characterized in that: the liquid-cooled battery comprises a battery box, a square electric core, a liquid cooling plate, a phase change material plate, a liquid cooling pipe and a liquid supply assembly;
The square battery cells are stacked and distributed in the battery box in N layers, and the large side surface of each square battery cell is a stacking surface; wherein; n is more than or equal to 1; the liquid cooling plates are arranged on the outer side wall surfaces of the N layers of square battery cells and along the length direction of the battery box;
A phase change material plate is respectively arranged on the top surface and the bottom surface of each layer of square battery core, a plurality of liquid cooling pipes are uniformly distributed in each phase change material plate, and each liquid cooling pipe is arranged along the length direction of the battery box;
the liquid supply assembly can provide cooling liquid to the liquid cooling plate and each liquid cooling pipe.
2. The modular structure of phase change cooling and liquid cooling combination for square cells of claim 1, wherein: the liquid supply assembly comprises a liquid supply main pipe I and a liquid supply main pipe II;
the liquid supply main pipe is used for supplying cooling liquid to the liquid cooling plate;
The second liquid supply main pipe is used for supplying cooling liquid to each liquid cooling pipe, and an electromagnetic valve is arranged on the second liquid supply main pipe.
3. The modular structure of phase change cooling and liquid cooling combination for square cells according to claim 1 or 2, wherein: when N is more than 1, the phase change material plate comprises a top phase change material plate, a middle phase change material plate and a bottom phase change material plate; the top phase change material plate is positioned at the top of the topmost square battery cell, and the bottom phase change material plate is positioned at the bottom of the bottommost square battery cell; the middle phase change material plate is positioned between two adjacent layers of square electric cores; the thicknesses of the top phase change material plate and the bottom phase change material plate are the same, and are H 1; the thickness of the intermediate phase change material plate is H 0, H 0＞H1.
4. The modular structure of phase change cooling and liquid cooling combination for square cells of claim 3, wherein: h 1＝2/3H0.
5. The modular structure of phase change cooling and liquid cooling combination for square cells of claim 4, wherein: and a liquid flow pipe is arranged in the middle phase change material plate, b liquid flow pipes are arranged in the top phase change material plate and the bottom phase change material plate, and a is more than b.
6. The modular structure of phase change cooling and liquid cooling combination for square cells of claim 5, wherein: a=b+1.
7. The modular structure of phase change cooling and liquid cooling combination for square cells of claim 3, wherein: the diameter of each liquid flow tube in the middle phase change material plate is D 0, and the diameter of each liquid flow tube in the top phase change material plate and the bottom phase change material plate is D 1, then D 0＝2/3H0,D1＝2/3H1.
8. The modular structure of phase change cooling and liquid cooling combination for square cells of claim 3, wherein: the calculation formula of the total thickness H of all layers of phase change material plates is as follows:
wherein Q c is the total heat generated by all layers of square battery cells;
q 1 is the total heat which can be taken away by the liquid flow plate;
c is the specific heat capacity of the phase change material in the phase change material plate;
ρ is the density of the phase change material in the phase change material plate;
l and W are the length and width of the phase change material plate respectively;
Delta T max is the maximum difference between the highest temperature of the square battery cell and the set allowable temperature.
9. The modular structure of phase change cooling and liquid cooling combination for square cells of claim 1, wherein: the phase change material plate comprises a square shell and phase change materials filled in the square shell; the square shell is made of aluminum shell, and the phase change material is a mixed material of paraffin and expanded graphite.
10. The modular structure of phase change cooling and liquid cooling combination for square cells of claim 2, wherein: the square battery cell temperature measuring assembly is used for monitoring the temperature of the square battery cell; the square cell temperature measuring assembly is connected with the electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322683819.XU CN220963490U (en) | 2023-10-08 | 2023-10-08 | Module structure suitable for phase change cooling and liquid cooling combination of square battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322683819.XU CN220963490U (en) | 2023-10-08 | 2023-10-08 | Module structure suitable for phase change cooling and liquid cooling combination of square battery cell |
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| Publication Number | Publication Date |
|---|---|
| CN220963490U true CN220963490U (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322683819.XU Active CN220963490U (en) | 2023-10-08 | 2023-10-08 | Module structure suitable for phase change cooling and liquid cooling combination of square battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220963490U (en) |
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2023
- 2023-10-08 CN CN202322683819.XU patent/CN220963490U/en active Active
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