A new type of heat dissipation structure of the coil core and its battery

Abstract

The utility model relates to a core with a novel heat dissipation structure, including a shell and a core group, wherein the shell is provided with an opening at the top, and the shell is sleeved on the outside of the core group, and the core group includes a core A and a core B, and the core A is provided with a positive pole ear and a negative pole ear on the upper side, and the core B is provided with a positive pole ear and a negative pole ear on the upper side, and heat dissipation components are provided on the outside of the core A and the core B. A battery, wherein the battery adopts the core with the novel heat dissipation structure mentioned above. This structure adopts a heat dissipation component instead of the termination glue and the Mylar film, so that the core group is coated with a layer of thermal conductive silicone sheet on all sides, and the thermal conductive silicone sheet itself is insulated, which connects the core group and the shell, can protect the core group, and enable the heat to be promptly diffused through the shell, thereby ensuring the stability of the electrical performance of the battery cell.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a winding core with a novel heat dissipation structure and a battery thereof. Background Art

[0002] As the energy storage industry continues to expand, the capacity of energy storage batteries, which are not bound by unified standards, has long exceeded the initial 280Ah. 314Ah has become the standard, and 500Ah+ is ready to go. However, with the surge in cell capacity, the heat dissipation of the cells has become an urgent problem to be solved. Currently, most 280 / 314Ah batteries use a double-core design, with termination glue between cells and Mylar film coating on the outside. The distance between the double cores is farther than the outside of the aluminum shell, making it difficult for the heat generated between the double cores to dissipate in time when the cells are charged and discharged, causing the electrodes and electrolytes between the cores to fail easily, affecting the electrical performance of the cells. Summary of the invention

[0003] The utility model aims to provide a winding core and a battery with a novel heat dissipation structure, so as to solve the problems in the background technology.

[0004] The purpose of the utility model is achieved as follows: a core with a novel heat dissipation structure includes a shell and a core group, the shell is provided with an opening on the top, the shell is sleeved on the outside of the core group, the core group includes a core A and a core B, the upper side of the core A is provided with a positive pole ear and a negative pole ear, the upper side of the core B is provided with a positive pole ear and a negative pole ear, and the outer sides of the core A and the core B are both provided with heat dissipation components.

[0005] The sides of the reel core A and the reel core B that are away from each other completely cover the heat dissipation component, and the sides of the reel core A and the reel core B that are close to each other half cover the heat dissipation component.

[0006] The heat dissipation component is made of a thermally conductive silicone sheet.

[0007] A battery adopts the winding core of the aforementioned novel heat dissipation structure.

[0008] The beneficial effects of the utility model are as follows: the structure adopts a heat dissipation component instead of the termination glue and the Mylar film, so that the core group is coated with a layer of thermal conductive silicone sheet on all sides. The thermal conductive silicone sheet itself is insulated, and it connects the core group and the shell to protect the core group, so that the heat can be diffused in time through the shell, thereby ensuring the stability of the electrical performance of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a top view of the structure of a coil core and a battery shell of a novel heat dissipation structure of the utility model.

[0010] Figure 2This is a top view structural diagram of a winding core of a novel heat dissipation structure and a winding core A and a winding core B of a battery of the utility model.

[0011] Figure 3 A side view of a winding core and a battery thereof of a novel heat dissipation structure of the utility model, wherein the winding core A and the winding core B are away from each other.

[0012] Figure 4 A winding core A and a winding core B of a battery of the utility model with a novel heat dissipation structure are attached close to each other on the side.

[0013] In the figure: 1, shell 2, winding core A 3, winding core B 4, positive electrode ear 5, negative electrode ear 6, heat dissipation component. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] Example 1

[0016] like Figure 1-4 As shown, a core with a novel heat dissipation structure includes a shell 1 and a core group, the shell 1 is provided with an opening on the top, the shell 1 is sleeved on the outside of the core group, the core group includes a core A2 and a core B3, the core A2 is provided with a positive electrode ear 4 and a negative electrode ear 5 on the upper side, the core B3 is provided with a positive electrode ear 4 and a negative electrode ear 5 on the upper side, and the core A2 and the core B3 are both provided with heat dissipation components 6 on the outside.

[0017] The sides of the core A2 and the core B3 that are away from each other completely cover the heat dissipation component 6, and the sides of the core A2 and the core B3 that are close to each other half cover the heat dissipation component 6.

[0018] The heat dissipation component 6 is made of a thermally conductive silicone sheet.

[0019] A battery adopts the winding core of the aforementioned novel heat dissipation structure.

[0020] When the utility model is in use, the attachment method of the heat dissipation component 6 of the structure is as shown in the attached figure, and the traditional core termination glue is replaced by a thermal conductive silicone sheet. After winding, the core A2 and the core B3 can be directly attached to the surface thereof, starting from between the inner pole ears of the core A2 and ending at the other side corner. The attachment method of the core B3 is symmetrical with that of the core A2. In this way, after the battery cell is assembled, the sides of the core A2 and the core B3 that are away from each other are completely covered with the thermal conductive silicone sheet, and the sides that are close to each other are half covered with the thermal conductive silicone sheet. The core A2 and the core B3 are stacked so that the core group is coated with a layer of thermal conductive silicone sheet on all sides. The thermal conductive silicone sheet itself is insulated and can protect the core A2 and the core B3. The traditional Mylar film is eliminated. When the battery cell is charged and discharged, the heat generated between the core A2 and the core B3 can be transferred to the battery surface through the thermal conductive silicone sheet, and the heat is diffused in time to ensure the electrical performance of the battery, especially the cycle performance of the battery cell.

[0021] Example 2

[0022] like Figure 1-4 As shown, a core with a novel heat dissipation structure includes a shell 1 and a core group, the shell 1 is provided with an opening on the top, the shell 1 is sleeved on the outside of the core group, the core group includes a core A2 and a core B3, the core A2 is provided with a positive electrode ear 4 and a negative electrode ear 5 on the upper side, the core B3 is provided with a positive electrode ear 4 and a negative electrode ear 5 on the upper side, and the core A2 and the core B3 are both provided with heat dissipation components 6 on the outside.

[0023] For better effect, the sides of the core A2 and the core B3 that are far away from each other completely cover the heat dissipation component 6, and the sides of the core A2 and the core B3 that are close to each other half cover the heat dissipation component 6. Furthermore, the shape and attachment method of the heat dissipation component 6 vary from battery to battery and are set according to specific circumstances.

[0024] For better effect, the heat dissipation component 6 is made of thermally conductive silicone sheet. The heat dissipation component material is preferably but not limited to thermally conductive silicone sheet, and other heat dissipation component materials with insulation and thermal conductivity and suitable for this structure can also be used.

[0025] A battery adopts the winding core of the aforementioned novel heat dissipation structure.

[0026] When the utility model is in use, the attachment method of the heat dissipation component 6 of this structure is as shown in the attached figure, and the traditional core termination glue is replaced by a thermal conductive silicone sheet. After the core A2 and the core B3 are wound, they can be directly attached to the surface, starting from between the inner pole ears of the core A2 and ending at the other side corner. The attachment method of the core B3 is symmetrical with that of the core A2. In this way, after the battery cell is assembled, the sides of the core A2 and the core B3 that are away from each other are completely covered with the thermal conductive silicone sheet, and the sides that are close to each other are half covered with the thermal conductive silicone sheet. The core A2 and the core B3 are stacked so that the core group is covered with a layer of thermal conductive silicone sheet on all sides. The thermal conductive silicone sheet itself is insulated and can protect the core A2 and the core B3. The traditional Mylar film is eliminated. When the battery cell is charged and discharged, the heat generated between the core A2 and the core B3 can be transferred to the battery surface through the thermal conductive silicone sheet, and the heat is diffused in time to ensure the electrical performance of the battery, especially the cycle performance of the battery cell. This structure includes but is not limited to the application of energy storage batteries, and power batteries, especially high-rate batteries, can also be used.

[0027] This is further illustrated by the following experimental table:

[0028] 0.5CP temperature rise 1.0CP temperature rise 1.5CP temperature rise This structure battery 6℃ 11.5℃ 15℃ Conventional battery cells 8℃ 15℃ 22℃

[0029] Table 1: Maximum temperature rise of batteries at different rates

[0030] It can be seen that the use of the battery cell with this structure enables the heat to be promptly diffused through the heat dissipation component and the shell.

Claims

1. A new type of heat dissipation structure of the winding core, including a shell and a winding core group, characterized in that: An opening is provided at the top of the shell, and the shell is sleeved on the outside of the core group. The core group includes a core A and a core B. Positive and negative pole ears are provided on the upper sides of the core A and the core B, and heat dissipation components are provided on the outside of the core A and the core B.

2. The winding core of the novel heat dissipation structure according to claim 1 is characterized in that: The sides of the core A and the core B that are away from each other completely cover the heat dissipation component.

3. The winding core of the novel heat dissipation structure according to claim 2 is characterized in that: The sides of the winding core A and the winding core B that are close to each other half cover the heat dissipation component.

4. The winding core of the novel heat dissipation structure according to claim 1 is characterized in that: The heat dissipation component is a thermally conductive silicone sheet.

5. The winding core of the novel heat dissipation structure according to claim 3 is characterized in that: The heat dissipation component is a thermally conductive silicone sheet.

6. A battery, characterized in that: The battery adopts a winding core with a novel heat dissipation structure as described in any one of claims 1-5.

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