Battery cell drying and heating plate

Abstract

The utility model relates to a battery cell drying and heating plate, which comprises a heating plate body used for heating a battery; the first heat conduction liner covers the heating plate body; the plurality of heat conducting sleeves are fixedly connected with the first heat conducting gasket; and the second heat conduction gaskets are fixedly connected with the heat conduction sleeve. A second heat conduction liner is arranged at the bottom of the heat conduction sleeve, and when a battery is placed in the heat conduction sleeve, the second heat conduction liner can deform to fill a gap between the battery and the heat conduction sleeve, so that the contact thermal resistance is reduced, and the heat transfer efficiency between the battery and the heat conduction sleeve is improved; the heat-conducting sleeve can be connected to the first heat-conducting liner, so that the gap between the heat-conducting sleeve and the heating plate body is filled, the contact thermal resistance between the heat-conducting sleeve and the heating plate body is reduced, the heat transfer efficiency between the heat-conducting sleeve and the heating plate body is improved, and the drying time of the battery is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cell manufacturing, in particular to a battery cell drying heating plate. Background Art

[0002] Baking plays a crucial role in the production of battery cells. The water content after baking directly affects the electrical performance. The baking process is carried out after the middle-stage assembly and before the liquid injection and encapsulation. The electrolyte has extremely high requirements for the water content, generally controlled within 150 ppm. Moisture has an important impact on the initial efficiency of battery capacity, cycle performance, internal resistance, and thickness. The current baking methods mainly include hot air circulation heating and contact baking. Due to defects such as poor temperature uniformity, long baking time, and high energy consumption, hot air circulation heating has gradually been phased out by the market. Contact baking is that the heating plate directly contacts the battery, with good temperature uniformity and short baking cycle.

[0003] Contact baking mainly consists of a baking fixture and a sealed furnace body. The baking fixture loads the battery and has an automatic heating function, while the sealed furnace body provides a vacuum environment. However, the current baking fixture still has the following defects: the heating plate is a planar structure, and the battery is directly placed on the aluminum heating plate through a heat conduction sleeve for heating. Since the heating plate is too long itself, the surface may be uneven during forming. Also, because the contact surfaces of the battery, heat conduction sleeve, and heating plate are all hard materials, in heat conduction, the heating plate cannot contact the heat conduction sleeve well, and the heat conduction sleeve cannot contact the battery well, resulting in a large contact thermal resistance between the battery and the heating plate, reducing the heat transfer efficiency of the heating plate and prolonging the drying time of the battery. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a battery cell drying heating plate, aiming to solve the problems that the contact thermal resistance between the battery and the heating plate is large, reducing the heat transfer efficiency of the heating plate and prolonging the drying time of the battery.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A battery cell drying heating plate, comprising:

[0007] A heating plate body for heating the battery;

[0008] A first heat conduction gasket covering the heating plate body;

[0009] A plurality of heat conduction sleeves fixedly connected to the first heat conduction gasket;

[0010] A plurality of second heat conduction gaskets fixedly connected to the heat conduction sleeves.

[0011] Further, the second heat-conducting gasket is of a circular structure, and the size of the second heat-conducting gasket is consistent with the size of the bottom of the battery.

[0012] Further, the heat-conducting sleeve includes:

[0013] A fixing part, one side of the fixing part is fixedly connected to the first heat-conducting gasket, the other side of the fixing part is fixedly connected to the second heat-conducting gasket, and an avoidance hole is provided at the center of the fixing part, and the second heat-conducting gasket is fixedly connected to the first heat-conducting gasket through the avoidance hole;

[0014] An installation part, the installation part is fixedly connected to the outer edge of the fixing part, and at least part of the battery is accommodated in the installation cavity of the installation part.

[0015] Further, several of the heat-conducting sleeves are divided into multiple sleeve groups, each of the sleeve groups is spaced apart from each other, and each of the sleeve groups includes n*m heat-conducting sleeves, the n*m heat-conducting sleeves are arranged in n rows and m columns, and the outer walls of adjacent heat-conducting sleeves are connected to each other.

[0016] Further, the number of n is 4, and the number of m is 5.

[0017] Further, several of the heat-conducting sleeves are divided into 4 sleeve groups.

[0018] Further, the adjacent second heat-conducting gaskets are spaced 41 mm in the X-axis direction and 48 mm in the Y-axis direction.

[0019] Further, it further includes:

[0020] Several third heat-conducting gaskets, and the third heat-conducting gaskets cover the inner wall of the heat-conducting sleeve.

[0021] Further, the height of the heat-conducting sleeve is 1 / 3 to 1 / 2 of the height of the battery.

[0022] For a cell drying and heating plate described in the present utility model, its beneficial effects are as follows:

[0023] In order to ensure good contact between the bottom of the battery and the bottom of the heat-conducting sleeve, a second heat-conducting gasket is provided at the bottom of the heat-conducting sleeve. When the battery is placed on the heat-conducting sleeve, the second heat-conducting gasket can deform to fill the gap between the battery and the heat-conducting sleeve, reduce the contact thermal resistance, and improve the heat transfer efficiency between the battery and the heat-conducting sleeve. At the same time, the first heat-conducting gasket is covered on the heating plate body, so that the heat-conducting sleeve can be connected to the first heat-conducting gasket, filling the gap between the heat-conducting sleeve and the heating plate body, reducing the contact thermal resistance between the heat-conducting sleeve and the heating plate body, improving the heat transfer efficiency between the heat-conducting sleeve and the heating plate body, and shortening the drying time of the battery. Description of the Drawings

[0024] Figure 1 is a schematic diagram of the overall structure of the cell drying and heating plate according to an embodiment of the present utility model;

[0025] Figure 2 is a schematic diagram of the disassembled structure of the cell drying and heating plate according to an embodiment of the present utility model;

[0026] Figure 3 is a cross-sectional view of the cell drying and heating plate according to an embodiment of the present utility model.

[0027] Description of the Reference Numerals:

[0028] 1. Battery; 2. Heating plate body; 3. First heat-conducting gasket; 4. Heat-conducting sleeve; 5. Second heat-conducting gasket. Detailed Description of the Embodiment

[0029] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0030] As Figures 1 to 3 shown, the present utility model provides a cell drying and heating plate, comprising:

[0031] A heating plate body 2 for heating the battery 1;

[0032] A first heat-conducting gasket 3, and the first heat-conducting gasket 3 covers the heating plate body 2;

[0033] A plurality of heat-conducting sleeves 4, and the plurality of heat-conducting sleeves 4 are fixedly connected to the first heat-conducting gasket 3;

[0034] A plurality of second heat-conducting gaskets 5, and the second heat-conducting gaskets 5 are fixedly connected to the heat-conducting sleeves 4.

[0035] In order to ensure good contact between the bottom of the cylindrical battery 1 and the bottom of the heat-conducting sleeve 4, a second heat-conducting gasket 5 is provided at the bottom of the heat-conducting sleeve 4. When the cylindrical battery 1 is placed on the heat-conducting sleeve 4, the second heat-conducting gasket 5 can deform to fill the gap between the cylindrical battery 1 and the heat-conducting sleeve 4, reducing the contact thermal resistance and improving the heat transfer efficiency between the cylindrical battery 1 and the heat-conducting sleeve 4. At the same time, the first heat-conducting gasket 3 covers the heating plate body 2, enabling the heat-conducting sleeve 4 to be connected to the first heat-conducting gasket 3, filling the gap between the heat-conducting sleeve 4 and the heating plate body 2, reducing the contact thermal resistance between the heat-conducting sleeve 4 and the heating plate body 2, improving the heat transfer efficiency between the heat-conducting sleeve 4 and the heating plate body 2, and shortening the drying time of the battery 1.

[0036] As Figure 2As shown, in some embodiments, the second heat-conducting gasket 5 is circular in structure, and the size of the second heat-conducting gasket 5 is the same as the bottom size of the battery 1. Setting the size of the second heat-conducting gasket 5 to be the same as the bottom size of the battery 1 can completely fill the gap between the bottom of the cylindrical battery 1 and the heat-conducting sleeve 4 after the cylindrical battery 1 enters and contacts the heat-conducting sleeve 4 and the second heat-conducting gasket 5. It should be noted that in some other embodiments, the battery to be dried is a square battery, so the second heat-conducting gasket can be square.

[0037] In some embodiments, the heat-conducting sleeve 4 includes:

[0038] A fixing part, one side of the fixing part is fixedly connected to the first heat-conducting gasket 3, the other side of the fixing part is fixedly connected to the second heat-conducting gasket 5, and an avoidance hole is provided at the center of the fixing part. The second heat-conducting gasket 5 is fixedly connected to the first heat-conducting gasket 3 through the avoidance hole;

[0039] An installation part, the installation part is fixedly connected to the outer edge of the fixing part, and at least part of the battery 1 is accommodated in the installation cavity of the installation part.

[0040] By providing an avoidance hole at the center of the fixing part, after the battery 1 is placed in the heat-conducting sleeve 4, it is directly connected to the first heat-conducting gasket 3 through the second heat-conducting gasket 5, thereby reducing the heat-conducting sleeve 4 as a heat transfer medium, and further improving the heat transfer efficiency.

[0041] It should be noted that the fixing part and the installation part are integrally formed to make the heat-conducting sleeve 4.

[0042] As Figures 1 to 3 shown, in some embodiments, several heat-conducting sleeves 4 are divided into multiple sleeve groups, each sleeve group is spaced apart from each other, and each sleeve group includes n*m heat-conducting sleeves 4. The n*m heat-conducting sleeves 4 are arranged in n rows and m columns, and the outer walls of adjacent heat-conducting sleeves 4 are connected to each other.

[0043] Each sleeve group can install n*m batteries 1. At the same time, the outer walls of adjacent heat-conducting sleeves 4 are connected to each other. When the heat-conducting sleeves 4 are bonded to the first heat-conducting gasket 3 with heat-resistant glue, an entire sleeve group can be installed at one time without installing each heat-conducting sleeve 4 one by one.

[0044] As Figures 1 to 3 shown, in some embodiments, the number of n is 4 and the number of m is 5. It should be noted that the number of n can also be other numbers, such as 3, 5, 6, etc., and the number of m can also be other numbers, such as 3, 4, 6, etc.

[0045] As Figures 1 to 3 shown, in some embodiments, several heat-conducting sleeves 4 are divided into 4 sleeve groups. It should be noted that the number of sleeve groups can also be 3, 5, 6, etc.

[0046] In some embodiments, the adjacent second heat-conducting pads 5 are spaced 41 mm in the X-axis direction and 48 mm in the Y-axis direction.

[0047] In some embodiments, it further includes:

[0048] A plurality of third heat-conducting pads covering the inner wall of the heat-conducting sleeve 4. Covering the inner wall of the heat-conducting sleeve 4 with the third heat-conducting pads can fill the contact part between the side wall of the battery 1 and the heat-conducting sleeve 4, and improve the heat transfer efficiency between the heat-conducting sleeve 4 and the side wall of the battery 1.

[0049] It should be noted that the first heat-conducting pad 3, the second heat-conducting pad 5 and the third heat-conducting pad have the same formulation composition. The formulation composition of the heat-conducting pad is: alumina > 85%, silicone oil < 13%, coupling agent < 2%, color paste < 1%. The heat transfer coefficient of the heat-conducting pad is greater than or equal to 5 W / mk. At the same time, the first heat-conducting pad 3, the second heat-conducting pad 5 and the third heat-conducting pad are respectively adhered to the heating plate body 2, the first heat-conducting pad 3 and the heat-conducting sleeve 4 through back glue.

[0050] In some embodiments, the height of the heat-conducting sleeve 4 is 1 / 3 to 1 times the height of the battery 1. The height of the heat-conducting sleeve 4 being 1 / 3 to 1 times the height of the battery 1 can make the battery 1 stable and not prone to tipping, and at the same time can transfer heat to the battery 1 in the heat-conducting sleeve 4, further improving the drying efficiency of the battery 1.

[0051] The above are only preferred embodiments of the present invention, and do not impose any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A battery cell drying and heating plate, characterized in that, Comprising: A heating plate body for heating the battery; A first heat-conducting gasket, which covers the heating plate body; A plurality of heat-conducting sleeves, and the plurality of heat-conducting sleeves are fixedly connected to the first heat-conducting gasket; A plurality of second heat-conducting gaskets, and the second heat-conducting gaskets are fixedly connected to the heat-conducting sleeves.

2. The cell drying and heating plate according to claim 1, wherein The second heat-conducting gasket is of a circular structure, and the size of the second heat-conducting gasket is the same as the size of the bottom of the battery.

3. The drying and heating plate for battery cells according to claim 1, wherein, The heat-conducting sleeve includes: A fixing part, one side of the fixing part is fixedly connected to the first heat-conducting gasket, the other side of the fixing part is fixedly connected to the second heat-conducting gasket, and an avoidance hole is provided at the center of the fixing part, and the second heat-conducting gasket is fixedly connected to the first heat-conducting gasket through the avoidance hole; An installation part, the installation part is fixedly connected to the outer edge of the fixing part, and at least part of the battery is accommodated in the installation cavity of the installation part.

4. The cell drying and heating plate according to claim 1, wherein The plurality of heat-conducting sleeves are divided into a plurality of sleeve groups, each of the sleeve groups is spaced apart from each other, and each of the sleeve groups includes n*m heat-conducting sleeves, the n*m heat-conducting sleeves are arranged in n rows and m columns, and the outer walls of adjacent heat-conducting sleeves are connected to each other.

5. The cell drying and heating plate according to claim 4, wherein, The number of n is 4, and the number of m is 5.

6. The cell drying and heating plate according to claim 4, characterized in that, The plurality of heat-conducting sleeves are divided into 4 sleeve groups.

7. The dry heating plate for battery cells according to claim 4, characterized in that, The adjacent second heat-conducting gaskets are spaced 41 mm in the X-axis direction and 48 mm in the Y-axis direction.

8. The dry heating plate for battery cells according to claim 1, wherein Further comprising: A plurality of third heat-conducting gaskets, which cover the inner wall of the heat-conducting sleeve.

9. The cell drying and heating plate according to claim 1, wherein The height of the heat-conducting sleeve is 1 / 3 to 1 / 2 of the height of the battery.

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