A heat dissipation device of a power battery module shell
Patent Information
- Application Number
- CN202522534476.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-28
AI Technical Summary
[0003]现有的动力电池模组外壳的散热装置通常通过风冷或者水冷配合散热片，在外壳的表面均匀设置散热片增加与空气接触面积，然后导热板或冷却液管从内部延伸至外壳表面，风机对外壳持续送风，使流动空气与散热片热交换带走电池热量来达到散热效果，但是空气的导热性能相对较差，限制了散热效率，其次风冷散热系统对环境温度较为敏感，环境温度过高时，空气的散热效果会下降，导致散热效果进一步减弱，同时部分散热装置在运行时风扇、电泵会消耗动力电池一定的电能，影响电池模组的整体能效，尤其是在需要长时间持续工作时
本实用新型通过设置散热机构，具体是通过设置热管和毛细吸水层，热管内部真空状态，降低内部冷却水的蒸发点，当电池包发热时，温度从密封导热箱传递至导热座，然后将毛细吸水层中的冷却水蒸发，蒸汽传递至端头受冷重新冷凝成液态，不需要动力驱动对电池包进行散热，保证装置的使用效果，同时热管散热依靠相变热传导，不受重力或方向影响，无论热管的方向如何变化，内部冷却液体会在毛细结构的帮助下自动流动，使冷却水的蒸发和冷凝过程依然可以顺利进行，提高装置的实用性，通过设置散热片和通孔，当冷却水蒸汽移动至热管两端时，散热片增加热管表面与空气的接触面积，同时通孔保证散热片与外界空气充分接触，保证冷却水的冷凝速度，保证装置的使用效果。
Smart Images
Figure CN224922795U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat dissipation device technology, and in particular to a heat dissipation device for the housing of a power battery module. Background Technology
[0002] A power battery is a power source that provides power to tools. It mainly refers to the storage batteries that power electric vehicles, electric trains, electric bicycles, and golf carts. In the automotive and motorcycle industry, it mainly provides electrical energy for starting and igniting engines and using on-board electronic equipment. In industrial power systems, it is used in power transmission and transformation stations to provide closing current for power units, to provide backup power for public facilities, and to provide power for communications. In the electric vehicle and electric bicycle industry, it replaces gasoline and diesel as the power source for electric vehicles or electric bicycles.
[0003] Existing power battery module casings typically employ air cooling or water cooling in conjunction with heat sinks. Heat sinks are evenly distributed on the surface of the casing to increase the contact area with air. Then, heat conduction plates or coolant pipes extend from the inside to the surface of the casing, and a fan continuously blows air onto the casing, allowing the flowing air to exchange heat with the heat sinks and remove the battery's heat to achieve a cooling effect. However, air has relatively poor thermal conductivity, which limits the cooling efficiency. Secondly, air-cooled cooling systems are quite sensitive to ambient temperature. When the ambient temperature is too high, the cooling effect of air will decrease, further weakening the cooling effect. At the same time, some cooling devices consume a certain amount of power battery energy during operation, such as fans and electric pumps, affecting the overall energy efficiency of the battery module, especially when it needs to operate continuously for a long time. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a heat dissipation device for the housing of a power battery module.
[0005] This utility model is achieved by the following technical solution: a heat dissipation device for the housing of a power battery module, including an anti-collision box, a heat dissipation mechanism is provided inside the anti-collision box, a fixing mechanism is provided on the inner wall of the anti-collision box, and a battery pack is provided on the inner wall of the fixing mechanism. The heat dissipation mechanism includes a heat pipe with end caps fixedly connected to both ends, a capillary water-absorbing layer fixedly connected to the inner wall of the heat pipe, a heat-conducting seat fixedly connected to the surface of the heat pipe, and heat sinks fixedly connected to the surface of the heat pipe. The anti-collision box has through holes at both ends.
[0006] As a further improvement to the above solution, the heat pipes are arranged in a number that are equidistantly arranged on the inner wall of the heat-conducting base. The inside of the heat pipes is in a vacuum state, and cooling water is arranged inside the heat pipes and adsorbed inside the capillary water-absorbing layer.
[0007] By employing the aforementioned technical solution, and by setting up a heat pipe and a capillary water absorption layer, the heat pipe is in a vacuum state, lowering the evaporation point of the internal cooling water. When the battery pack heats up, the temperature is transferred from the sealed heat-conducting box to the heat-conducting base, where the cooling water in the capillary water absorption layer evaporates. The vapor is transferred to the end, where it is cooled and re-condensed into a liquid state. No power is required to dissipate heat from the battery pack, ensuring the device's performance. Furthermore, the heat pipe's heat dissipation relies on phase change heat conduction, unaffected by gravity or direction. Regardless of the heat pipe's orientation, the internal cooling liquid will automatically flow with the help of the capillary structure, allowing the evaporation and condensation processes of the cooling water to proceed smoothly, thus improving the device's practicality.
[0008] As a further improvement to the above solution, the number of heat sinks is set to several, which are equidistantly arranged on the surface of the heat pipe, and the through holes are opened at the corresponding positions of the heat sinks.
[0009] By using the above technical solution, and by setting heat sinks and through holes, when cooling water vapor moves to both ends of the heat pipe, the heat sinks increase the contact area between the heat pipe surface and the air, while the through holes ensure that the heat sinks are in full contact with the outside air, thus ensuring the condensation rate of the cooling water and the effectiveness of the device.
[0010] As a further improvement to the above solution, the fixing mechanism includes a fixing box, the surface of which is provided with fixing holes, a shock-absorbing damping block is fixedly connected to the surface of the fixing box, and a sealed heat-conducting box is fixedly connected to the surface of the heat-conducting seat.
[0011] As a further improvement to the above solution, the surface of the fixing box is fixedly connected to the end of the heat-conducting seat away from the sealed heat-conducting box, both ends of the fixing box are fixedly connected to the inner wall of the anti-collision box, the inner wall of the fixing hole is fixedly connected to the surface of the heat pipe, and the inner wall of the sealed heat-conducting box is fixedly connected to the surface of the battery pack.
[0012] As a further improvement to the above solution, four shock-absorbing damping blocks are provided, which are fixedly connected to the inner wall of the anti-collision box at the four corners of the fixed box.
[0013] The above technical solution, by setting up shock-absorbing damping blocks, forms a buffer zone between the anti-collision box and the fixed box, which can effectively reduce the impact of external vibration on the battery pack and extend the service life of the battery module.
[0014] As a further improvement to the above solution, the heat sink is disposed between the anti-collision box and the fixed box.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes a heat dissipation mechanism, specifically a heat pipe and a capillary water absorption layer. The heat pipe operates under a vacuum, lowering the evaporation point of the internal cooling water. When the battery pack heats up, the temperature is transferred from the sealed heat-conducting box to the heat-conducting base. The cooling water in the capillary water absorption layer then evaporates, and the vapor is transferred to the ends where it cools and condenses back into liquid. No power is needed to dissipate heat from the battery pack, ensuring the device's effectiveness. Furthermore, the heat pipe's heat dissipation relies on phase change heat conduction, unaffected by gravity or direction. Regardless of the heat pipe's orientation, the internal cooling liquid flows automatically with the help of the capillary structure, allowing the evaporation and condensation processes to proceed smoothly, improving the device's practicality. By incorporating heat sinks and through-holes, when the cooling water vapor moves to both ends of the heat pipe, the heat sinks increase the contact area between the heat pipe surface and the air, while the through-holes ensure sufficient contact between the heat sinks and the outside air, guaranteeing the cooling water's condensation rate and ensuring the device's effectiveness.
[0016] This invention, by setting a fixing mechanism, specifically by setting a shock-absorbing damping block, forms a buffer zone between the anti-collision box and the fixing box, which can effectively reduce the impact of external vibration on the battery pack and extend the service life of the battery module. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the main cross-sectional structure of this utility model; Figure 3 This is a side view sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the exploded structure of this utility model; Figure 5 This is a cross-sectional structural diagram of the heat dissipation mechanism of this utility model.
[0018] Explanation of key symbols: 1. Anti-collision box; 2. Heat dissipation mechanism; 201. Heat pipe; 202. End; 203. Capillary water absorption layer; 204. Heat conduction base; 205. Heat sink; 206. Through hole; 3. Fixing mechanism; 301. Fixing box; 302. Fixing hole; 303. Shock-absorbing damping block; 304. Sealed heat conduction box; 4. Battery pack. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Example
[0020] Please combine Figure 1-5The heat dissipation device for the housing of a power battery module in this embodiment includes a crash box 1, a heat dissipation mechanism 2 is provided inside the crash box 1, a fixing mechanism 3 is provided on the inner wall of the crash box 1, and a battery pack 4 is provided on the inner wall of the fixing mechanism 3. The heat dissipation mechanism 2 includes a heat pipe 201, with end caps 202 fixedly connected to both ends of the heat pipe 201, a capillary water absorption layer 203 fixedly connected to the inner wall of the heat pipe 201, a heat-conducting seat 204 fixedly connected to the surface of the heat pipe 201, and a heat sink 205 fixedly connected to the surface of the heat pipe 201. Through holes 206 are opened at both ends of the anti-collision box 1.
[0021] Several heat pipes 201 are equidistantly arranged on the inner wall of the heat-conducting base 204. The inside of the heat pipe 201 is in a vacuum state, and cooling water is installed inside the heat pipe 201 and adsorbed inside the capillary water absorption layer 203. The vacuum state inside the heat pipe 201 lowers the evaporation point of the internal cooling water. When the battery pack 4 heats up, the temperature is transferred from the sealed heat-conducting box 304 to the heat-conducting base 204, and then the cooling water in the capillary water absorption layer 203 evaporates. The vapor is transferred to the end 202, where it is cooled and re-condensed into a liquid state. No power is required to dissipate heat from the battery pack 4, ensuring the effectiveness of the device. At the same time, the heat dissipation of the heat pipe 201 relies on phase change heat conduction and is not affected by gravity or direction. No matter how the direction of the heat pipe 201 changes, the internal cooling liquid will flow automatically with the help of the capillary structure, so that the evaporation and condensation process of the cooling water can still proceed smoothly.
[0022] The heat sink 205 is provided in several quantities and is equidistantly arranged on the surface of the heat pipe 201. Through holes 206 are opened at corresponding positions on the heat sink 205. When the cooling water vapor moves to both ends of the heat pipe 201, the heat sink 205 increases the contact area between the surface of the heat pipe 201 and the air. At the same time, the through holes 206 ensure that the heat sink 205 is in full contact with the outside air, thus ensuring the condensation rate of the cooling water.
[0023] The fixing mechanism 3 includes a fixing box 301, a fixing hole 302 is provided on the surface of the fixing box 301, a shock-absorbing damping block 303 is fixedly connected to the surface of the fixing box 301, and a sealed heat-conducting box 304 is fixedly connected to the surface of the heat-conducting seat 204.
[0024] The surface of the fixed box 301 is fixedly connected to the end of the heat-conducting seat 204 away from the sealed heat-conducting box 304. Both ends of the fixed box 301 are fixedly connected to the inner wall of the anti-collision box 1. The inner wall of the fixed hole 302 is fixedly connected to the surface of the heat pipe 201. The inner wall of the sealed heat-conducting box 304 is fixedly connected to the surface of the battery pack 4.
[0025] Four shock-absorbing damping blocks 303 are provided and fixedly connected to the inner wall of the anti-collision box 1 at the four corners of the fixed box 301. The shock-absorbing damping blocks 303 form a buffer zone between the anti-collision box 1 and the fixed box 301, which can effectively reduce the impact of external vibration on the battery pack 4 and extend the service life of the battery module.
[0026] The heat sink 205 is positioned between the anti-collision box 1 and the fixed box 301.
[0027] The implementation principle of the heat dissipation device for the casing of a power battery module in this embodiment is as follows: When in use, the battery pack 4 is placed inside the sealed heat conduction box 304. When the battery pack 4 is continuously heated, the temperature is transferred from the sealed heat conduction box 304 to the heat conduction seat 204. Then, the cooling water in the capillary water absorption layer 203 evaporates, and the cooling water vapor moves to both ends of the heat pipe 201. The heat sink 205 increases the contact area between the surface of the heat pipe 201 and the air. It is cooled and re-condensed into a liquid state. No power is needed to drive the heat dissipation of the battery pack 4. At the same time, the heat dissipation of the heat pipe 201 relies on phase change heat conduction and is not affected by gravity or direction. No matter how the direction of the heat pipe 201 changes, the internal cooling liquid will flow automatically with the help of the capillary structure, so that the evaporation and condensation process of the cooling water can still proceed smoothly. The shock-absorbing damping block 303 forms a buffer zone between the anti-collision box 1 and the fixed box 301, which can effectively reduce the impact of external vibration on the battery pack 4.
[0028] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A heat dissipation device for the housing of a power battery module, characterized in that, It includes a crash box (1), the interior of which is provided with a heat dissipation mechanism (2), the inner wall of which is provided with a fixing mechanism (3), and the inner wall of the fixing mechanism (3) is provided with a battery pack (4). The heat dissipation mechanism (2) includes a heat pipe (201), with end caps (202) fixedly connected to both ends of the heat pipe (201), a capillary water absorption layer (203) fixedly connected to the inner wall of the heat pipe (201), a heat-conducting seat (204) fixedly connected to the surface of the heat pipe (201), and a heat sink (205) fixedly connected to the surface of the heat pipe (201). The anti-collision box (1) has through holes (206) at both ends.
2. The heat dissipation device for a power battery module housing as described in claim 1, characterized in that: The number of heat pipes (201) is set in a certain way, and they are equidistantly arranged on the inner wall of the heat-conducting base (204). The inside of the heat pipe (201) is in a vacuum state, and cooling water is provided inside the heat pipe (201) and adsorbed inside the capillary water-absorbing layer (203).
3. The heat dissipation device for a power battery module housing as described in claim 1, characterized in that: The number of heat sinks (205) is set to a certain extent, and they are equidistantly arranged on the surface of the heat pipe (201). The through holes (206) are opened at the corresponding positions of the heat sinks (205).
4. The heat dissipation device for a power battery module housing as described in claim 1, characterized in that: The fixing mechanism (3) includes a fixing box (301), the surface of the fixing box (301) is provided with fixing holes (302), the surface of the fixing box (301) is fixedly connected with a shock-absorbing damping block (303), and the surface of the heat-conducting seat (204) is fixedly connected with a sealed heat-conducting box (304).
5. The heat dissipation device for a power battery module housing as described in claim 4, characterized in that: The surface of the fixed box (301) is fixedly connected to the end of the heat-conducting seat (204) away from the sealed heat-conducting box (304), the two ends of the fixed box (301) are fixedly connected to the inner wall of the anti-collision box (1), the inner wall of the fixed hole (302) is fixedly connected to the surface of the heat pipe (201), and the inner wall of the sealed heat-conducting box (304) is fixedly connected to the surface of the battery pack (4).
6. The heat dissipation device for a power battery module housing as described in claim 4, characterized in that: The number of shock-absorbing damping blocks (303) is four, which are fixedly connected to the inner wall of the anti-collision box (1) at the four corners of the fixed box (301).
7. The heat dissipation device for a power battery module housing as described in claim 4, characterized in that: The heat sink (205) is disposed between the anti-collision box (1) and the fixed box (301).