A battery pack heat dissipation assembly

Abstract

The utility model discloses a battery pack heat dissipation subassembly relates to battery pack technical field has solved the problem that the heat dissipation of the battery cell in small -size battery pack exists inconvenient. The heat dissipation subassembly includes the heat dissipation body, and the inside of heat dissipation body forms the cooling channel for going into liquid circulating cooling medium, and the length direction of heat dissipation body has the import and export that links with the both ends of cooling channel respectively in one end, and cooling channel extends from the one end where import is at to the other end along the length direction of heat dissipation body, and from the other end, return extension to the position where export is at, and the both sides of heat dissipation body length direction have the adhesion area for and the battery cell adhesion respectively. The heat dissipation subassembly forms the cooling channel for going into liquid circulating cooling medium in heat dissipation body, and liquid cooling medium can circulate flow in cooling channel, thereby to the battery cell that adhesion in the both sides of heat dissipation body sustained cooling, and the positioning part of battery cell is changed into the heat dissipation part, and this kind of structure design does not occupy the redundant space in battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a battery pack heat dissipation component. Background Technology

[0002] A battery pack consists of multiple cells connected in series and parallel. Several cells are placed inside the battery system housing and then connected in series and parallel via wires. Currently, many larger battery packs incorporate external cooling mechanisms or internal liquid cooling pipes to cool the cells and prevent overheating, which could compromise safety. Larger battery packs typically have ample internal space for such liquid cooling pipes.

[0003] However, for small battery packs, the limited space inside the battery pack casing makes it difficult to add liquid cooling pipes to improve heat dissipation. The conventional approach is to add cooling mechanisms to the outside of the battery pack. However, the battery pack casing obstructs the flow of heat from the cells, limiting heat dissipation capacity. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by designing a battery pack heat dissipation component, which solves the problem of inconvenient heat dissipation of battery cells in small battery packs.

[0005] To achieve the above objectives, the technical solution of this utility model is a battery pack heat dissipation assembly, including a heat sink. The heat sink has a cooling channel formed inside for introducing a liquid circulating cooling medium. One end of the heat sink along its length has an inlet and an outlet respectively connected to the two ends of the cooling channel. The cooling channel extends along the length of the heat sink from the inlet to the other end and then extends back to the outlet. Both sides of the heat sink along its length have bonding areas for bonding with the battery cell.

[0006] Preferably, the bonding area has multiple limiting grooves that are adapted to the shape of the battery cell.

[0007] Preferably, multiple limiting grooves are evenly distributed along the length of the heat sink.

[0008] Preferably, the middle region of the heat sink in the width direction is recessed to form a partition area.

[0009] Preferably, the middle region of the heat sink in the thickness direction is recessed inward to form a partition area.

[0010] Preferably, a connecting portion is formed within the partition area to connect the two side walls of the partition area.

[0011] Preferably, the inlet and outlet are distributed along the width or thickness direction of the heat sink.

[0012] Preferably, the inlet and outlet are respectively connected to an inlet pipe and an outlet pipe.

[0013] Its advantages over existing technologies are: This invention transforms the component that positions the battery cells within the battery pack into a heat dissipation component. A cooling channel for circulating liquid cooling medium is formed within the heat dissipation body. This channel extends along the length of the heat dissipation body from one inlet to the other, then folds back to the outlet. The liquid cooling medium enters the cooling channel from the inlet, flows from one end of the heat dissipation body to the other, folds back, and exits from the outlet, thus achieving circulation and continuously cooling the battery cells attached to both sides of the heat dissipation body. This structural design achieves heat dissipation of the battery cells without occupying extra space within the battery pack, ultimately reducing the overall temperature of the battery pack and improving its safety.

[0014] Because the battery cell is in direct contact with the outer surface of the heat sink, it has higher thermal conductivity, thereby improving heat dissipation performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the axial structure of the heat sink in Example 1; Figure 2 This is a front view schematic diagram of the heat sink structure in Example 1; Figure 3 This is a schematic diagram showing the heat sink and the battery cell in contact. Figure 4 This is a top view of the heat sink structure in Example 2.

[0016] In the diagram, 1 is the heat sink; 101 is the liquid inlet pipe; 102 is the liquid outlet pipe; 103 is the partition area; 104 is the connection part; 105 is the limiting groove; and 2 is the battery cell. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0018] Example 1 like Figure 1 As shown, a preferred embodiment of this utility model provides a battery pack heat dissipation assembly, which mainly includes a heat sink 1. The heat sink 1 is integrally injection molded and has good thermal conductivity. The heat sink 1 is a component inside the battery pack used for positioning the battery cells 2.

[0019] In this embodiment, the width direction of the heat sink 1 is consistent with the axial direction of the battery cell 2, and the thickness direction is consistent with one of the diameter directions of the battery cell 2.

[0020] The heat sink 1 has an internal cavity forming a cooling channel. One end of the heat sink 1 has an inlet and an outlet, which are connected to the two ends of the cooling channel, respectively. Cooling liquid, as the cooling medium, enters the cooling channel from the inlet and exits from the outlet, forming a circulation to continuously cool the battery cell 2.

[0021] The inlet and outlet are connected to an external coolant supply assembly, respectively. An inlet pipe 101 and an outlet pipe 102 are connected to the inlet and outlet, respectively, for connecting to the coolant supply assembly.

[0022] See Figure 2 , Figure 3 On both sides of the heat sink 1 are bonding areas that are in contact with the battery cell 2, located on both sides of the length direction of the heat sink 1. Multiple limiting grooves 105 are formed in the bonding areas on both sides, and the multiple limiting grooves 105 are evenly distributed along the length direction of the heat sink 1 to ensure the uniformity of heat conduction.

[0023] The groove surface of the limiting groove 105 is arc-shaped, which is adapted to the shape of the battery cell 2 to increase the contact area between the battery cell 2 and the heat sink 1 and increase heat dissipation.

[0024] like Figure 2 As shown, the inlet and outlet are vertically distributed along the width of the heat sink 1. The cooling channel extends from the inlet end along the length of the heat sink 1, then extends upwards along the width of the heat sink 1, and finally extends back to the outlet end. Therefore, from the frontal view of the heat sink 1, the cooling channel has a U-shaped shape (as shown in the image). Figure 2 (As shown by the dashed line in the middle), further enhancing heat dissipation.

[0025] To save materials, a partition area 103 is formed by recessing inward along the length of the heat sink 1 in the middle area on both sides of the bonding area of ​​the heat sink 1 to form a U-shaped cooling channel. A connecting part 104 is integrally formed in the partition area 103, which connects the upper and lower side walls of the partition area 103 to increase the overall structural strength.

[0026] Example 2 like Figure 4As shown, the thickness of the heat sink 1 in this embodiment is slightly thicker than that in Embodiment 1. In this embodiment, the inlet and outlet are distributed along the thickness direction of the heat sink 1. The cooling channel extends from the end where the inlet is located along the length direction of the heat sink 1, then extends along the thickness direction of the heat sink 1, and finally extends back to the end where the outlet is located. Therefore, from the top view of the heat sink 1, the cooling channel has a U-shaped shape to enhance heat dissipation.

[0027] Correspondingly, in the middle region between the top and bottom surfaces of the heat sink 1, a partition area 103 is formed by recessing inward along the length of the heat sink 1 to create a U-shaped cooling channel (e.g., Figure 4 (As shown by the dashed line). A connecting part 104 is integrally formed within the partition area 103, which connects the front and rear side walls of the partition area 103 to increase the overall structural strength.

[0028] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A battery pack heat dissipation assembly, characterized in that, The device includes a heat sink (1), which has a cooling channel inside for introducing a liquid circulating cooling medium. One end of the heat sink (1) along its length has an inlet and an outlet that are respectively connected to the two ends of the cooling channel. The cooling channel extends along the length of the heat sink (1) from one end where the inlet is located to the other end, and then extends back from the other end to the location of the outlet. Both sides of the heat sink (1) along its length have a bonding area for bonding with the battery cell (2).

2. The battery pack heat dissipation assembly according to claim 1, characterized in that, The bonding area has multiple limiting grooves (105) that are adapted to the shape of the battery cell (2).

3. The battery pack heat dissipation assembly according to claim 2, characterized in that, Multiple limiting grooves (105) are evenly distributed along the length of the heat sink (1).

4. The battery pack heat dissipation assembly according to claim 1, characterized in that, The heat sink (1) has a partition area (103) formed by an inward recess in the middle region along its width direction.

5. The battery pack heat dissipation assembly according to claim 1, characterized in that, The heat sink (1) has an inwardly recessed partition area (103) in the middle region along its thickness direction.

6. The battery pack heat dissipation assembly according to claim 4 or 5, characterized in that, A connecting portion (104) is formed within the partition area (103) to connect the two side walls of the partition area (103).

7. The battery pack heat dissipation assembly according to claim 1, characterized in that, The inlet and outlet are distributed along the width or thickness of the heat sink (1).

8. The battery pack heat dissipation assembly according to claim 7, characterized in that, The inlet and outlet are respectively connected to an inlet pipe (101) and an outlet pipe (102).

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