A power battery pack cooling module

Abstract

The application discloses a power battery pack cooling module, which comprises a uniform temperature plate, a thermoelectric refrigerator, a liquid cooling plate and a support plate, wherein the uniform temperature plate is attached to a heat-emitting surface of the power battery pack, the upper side of the thermoelectric refrigerator is attached to the uniform temperature plate, and the lower side of the thermoelectric refrigerator is attached to the liquid cooling plate; the liquid cooling plate is provided with a liquid inlet and a liquid outlet; the support plate is in a groove-shaped structure with an upward opening, and the inner surface of the support plate is wrapped with a heat insulation material; and the liquid cooling plate is accommodated in the groove-shaped structure of the bottom support plate. The cooling module can effectively realize heat dissipation of the power battery pack.

Description

Technical Field

[0001] This application relates to the field of thermal management technology for new energy vehicles, specifically to a method for cooling power battery packs. Background Technology

[0002] With the increase in energy density of power batteries for new energy vehicles, the heat generated during battery charging and discharging is increasing dramatically. If the heat cannot be dissipated in time, it will lead to an increase in the temperature gradient of the battery pack, a shortened cycle life, and even the risk of thermal runaway.

[0003] Existing cooling technologies are mainly divided into three categories: air cooling, liquid cooling, and phase change cooling. Air cooling systems dissipate heat through air convection, but the heat exchange efficiency is low and it is difficult to meet the requirements of high-rate charging and discharging. Liquid cooling systems use coolant to flow through metal plates (such as aluminum liquid cooling plates) to remove heat. Although this can improve heat dissipation capacity, direct contact installation is prone to contact thermal resistance due to uneven surfaces, resulting in uneven heat dissipation in local areas. Phase change material cooling relies on the heat absorption of material phase change, which has the defects of uncontrollable thermal conduction rate and difficulty in continuous operation.

[0004] Existing power battery cooling systems generally suffer from problems such as contact thermal resistance when the liquid cooling plate directly contacts the battery surface, leading to localized overheating; low integration of thermoelectric cooling components and heat sinks, making it impossible to achieve directional heat conduction; and the cooling module transferring absorbed heat back into the battery box during operation, causing secondary thermal pollution. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this application is to provide a cooling module for power battery packs to achieve effective cooling of power battery packs.

[0006] This application discloses a power battery pack cooling module, which includes a heat spreader, a thermoelectric cooler, a liquid cooling plate, and a support plate. The heat spreader is attached to the heating surface of the power battery pack, the upper side of the thermoelectric cooler is attached to the heat spreader, and the lower side of the thermoelectric cooler is attached to the liquid cooling plate. The liquid cooling plate has a liquid inlet and a liquid outlet. The support plate is an upward-opening groove structure, and the inner surface of the support plate is covered with heat insulation material.

[0007] The aforementioned liquid cooling plate is housed within the groove-shaped structure of the bottom support plate.

[0008] Preferably, it also includes a top insulating thermal pad, and the heat spreader is attached to the heating surface of the power battery pack through the insulating thermal pad.

[0009] Preferably, the heating surface is the electrode of the battery pack or the surface of the battery cell.

[0010] Preferably, it also includes a heat insulation layer with through holes that match the shape of the thermoelectric cooler. In the assembled state, the upper surface of the thermoelectric cooler is flush with the upper surface of the heat insulation layer, and the lower surface of the thermoelectric cooler is flush with the lower surface of the heat insulation layer.

[0011] Preferably, the number of through holes is 5-10, and the number of thermoelectric chips is equal to the number of through holes.

[0012] Preferably, it also includes an insulating thermally conductive pad for a thermoelectric cooler, with the upper side of the thermoelectric chip attached to the heat spreader plate via the insulating thermally conductive pad for a thermoelectric cooler, and the lower side of the thermoelectric chip attached to the liquid cooling plate via another insulating thermally conductive pad for a thermoelectric cooler.

[0013] This application also provides a power battery pack having the aforementioned cooling module.

[0014] In this application, by setting up a cooling module for the power battery pack, the problem of local overheating of the battery pack can be solved, the heat of the battery pack can be directionally conducted, and the cooling module can effectively prevent heat from being transferred back to the battery box and causing secondary thermal pollution when it is working. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cooling module structure for a power battery pack provided in an embodiment of this application;

[0016] Wherein: 1: Top insulating thermal conductive pad, 2: Temperature distribution plate, 3: Thermal insulation layer, 4: Liquid cooling plate, 5: Insulating thermal conductive pad for thermoelectric cooler, 6: Thermoelectric cooler, 7: Support plate. Detailed Implementation

[0017] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the specific embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the disclosure of the present application to those skilled in the art.

[0018] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0019] In the accompanying drawings, for clarity, the dimensions of layers, areas, and elements, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0020] A power battery pack cooling module includes a top insulating thermally conductive pad 1, a heat spreader 2, a heat insulation layer 3, a liquid cooling plate 4, an insulating thermally conductive pad 5 for a thermoelectric cooler, a thermoelectric cooler 6, and a support plate 7.

[0021] The heat spreader 2 is attached to the heating surface of the power battery pack via the top insulating thermal pad 1. This heating surface is either the electrode surface or the cell surface of the battery pack. The heat insulation layer 3 has multiple through holes spaced apart, the shape of which matches the thermoelectric cooler 6. The number of thermoelectric coolers is equal to the number of through holes. The thermoelectric coolers are housed within these through holes, and in the assembled state, the upper surface of the thermoelectric cooler is flush with the upper surface of the heat insulation layer 3, and the lower surface of the thermoelectric cooler is flush with the lower surface of the heat insulation layer 3.

[0022] Thermoelectric coolers, also known as TEC semiconductor coolers, are heat dissipation devices made using the Peltier effect, also known as the thermoelectric effect. When a direct current passes through a thermocouple composed of two semiconductor materials in a thermoelectric cooler, heat is absorbed at one end and released at the other.

[0023] The upper side of the thermoelectric cooler 6 is attached to the heat spreader plate 2 via an insulating thermal pad 5, and the lower side of the thermoelectric cooler 6 is attached to the liquid cooling plate 4 via another thermoelectric cooler with an insulating thermal pad 5.

[0024] The liquid cooling plate 4 has a liquid inlet and a liquid outlet. The coolant circulates through the liquid inlet and the liquid outlet. The liquid cooling plate is used to transfer the heat on the thermoelectric chip to the coolant.

[0025] The support plate 7 is an upward-opening groove-shaped structure, and its inner surface is covered with heat-insulating material. The aforementioned liquid cooling plate 4 is housed within the groove-shaped structure of the support plate 7. In the assembled state, the support plate 7 is surrounded by its heat-insulating material and heat-insulating layer 3. This arrangement allows the cooling module to effectively remove heat from the power battery pack transferred to the heat spreader while preventing the cooling module from diffusing the absorbed heat into the battery box, thus avoiding unnecessary heat dissipation during cooling.

[0026] It should be understood that the phrases "in embodiments of this application" or "in some embodiments" throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in embodiments of this application" or "in some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0027] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power battery pack cooling module, the cooling module comprising a heat spreader, a thermoelectric cooler, a liquid cooling plate, and a support plate, wherein: The heat spreader is attached to the heating surface of the power battery pack, the upper side of the thermoelectric cooler is attached to the heat spreader, and the lower side of the thermoelectric cooler is attached to the liquid cooling plate. The liquid cooling plate has a liquid inlet and a liquid outlet; The support plate has an upward-opening groove structure, and the inner surface of the support plate is covered with heat insulation material; The aforementioned liquid cooling plate is housed within the groove-shaped structure of the bottom support plate.

2. The power battery pack cooling module according to claim 1, characterized in that, It also includes a top insulating thermal pad, and the heat spreader is attached to the heat-generating surface of the power battery pack through the insulating thermal pad.

3. The power battery pack cooling module according to claim 1, characterized in that, The aforementioned heating surface is either the electrode of the battery pack or the surface of the battery cell.

4. The power battery pack cooling module according to any one of claims 1-3, characterized in that, It also includes a heat insulation layer with through holes that match the shape of the thermoelectric cooler. In the assembled state, the upper surface of the thermoelectric cooler is flush with the upper surface of the heat insulation layer, and the lower surface of the thermoelectric cooler is flush with the lower surface of the heat insulation layer.

5. The power battery pack cooling module according to claim 4, characterized in that, The number of vias is 5-10, and the number of thermoelectric chips is equal to the number of vias.

6. The power battery pack cooling module according to claim 1, characterized in that, It also includes an insulating thermal pad for thermoelectric coolers. The upper side of the thermoelectric chip is attached to the heat spreader via the insulating thermal pad for thermoelectric coolers, and the lower side of the thermoelectric chip is attached to the liquid cooling plate via another insulating thermal pad for thermoelectric coolers.

7. A power battery pack, characterized in that, The power battery pack has a cooling module as described in any one of claims 1-6.

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