Device for cooling battery cell after baking

Abstract

The utility model relates to the technical field of cooling after baking of a battery cell, in particular to a cooling device after baking of the battery cell, which comprises a cooling box, a cooling circulation system arranged on the cooling box in a communicated manner, and a turnover trolley used for placing the battery cell and matched with the cooling box for use, the cooling circulation system comprises an air inlet pipe arranged on the cooling box in a communicating mode, an air outlet pipe arranged on the cooling box in a communicating mode and a compression refrigerating machine arranged on the air inlet pipe. The low-temperature nitrogen cooling device has the beneficial effects that in actual use, low-temperature nitrogen is fed into the connecting pipe by the air inlet pipe and then is discharged through the air outlet holes in the tops of the diffusion part I and the diffusion part II, that is, the low-temperature nitrogen can be uniformly diffused into the cooling box through the diffusion part I and the diffusion part II; meanwhile, the diffusion part I and the diffusion part II are positioned below each layer of battery cells, so that each layer of battery cells can be quickly and uniformly cooled; the cooling effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling down a battery cell after baking, and in particular to a device for cooling down a battery cell after baking. Background Art

[0002] With the rapid development of science and technology, lithium-ion batteries are increasingly used in electric vehicles, energy storage systems, mobile devices and other fields. In the production process of lithium-ion batteries, battery cell baking is an important step, which helps to remove moisture and volatiles inside the battery cell and improve the performance and safety of the battery cell. However, the temperature of the battery cell after baking is high. If it is not cooled down in time, it may have an adverse effect on the performance and safety of the battery cell.

[0003] At present, the main method of cooling the battery cells after baking is to place the battery cells on a turnover trolley, then push the turnover trolley into a cooling box, and cool them down by introducing low-temperature nitrogen into the cooling box. Although this method can cool the battery cells, there are some problems in actual use.

[0004] First, when nitrogen is directly introduced into the cooling box, the diffusion effect of nitrogen is poor due to the large internal space of the cooling box, making it difficult to evenly cool the battery cells. This results in a large temperature difference between the surface and the interior of the battery cells, affecting the performance and safety of the battery cells.

[0005] Secondly, due to the uneven diffusion of nitrogen, some battery cells may not be able to fully contact the low-temperature nitrogen, resulting in poor cooling effect. This not only prolongs the cooling time, but also increases energy consumption and production costs.

[0006] Therefore, a device for cooling the battery cell after baking is needed to overcome the above problems. Utility Model Content

[0007] In order to solve the above problems, an embodiment of the utility model provides a device for cooling a battery cell after baking, which achieves the purpose of solving the problems raised in the background technology.

[0008] In order to achieve the above-mentioned purpose, the embodiment of the utility model specifically adopts the following technical scheme: a device for cooling down a battery cell after baking, comprising a cooling box, a cooling circulation system connected to and arranged on the cooling box, and a turnover vehicle for placing the battery cell and used in conjunction with the cooling box, wherein the cooling circulation system comprises an air inlet pipe connected to and arranged on the cooling box, an air outlet pipe connected to and arranged on the cooling box, and a compression refrigerator arranged on the air inlet pipe; a diffusion component for diffusing the gas passed from the air inlet pipe into the cooling box is arranged inside the cooling box; the diffusion component comprises a connecting pipe arranged inside the cooling box and connected to the air inlet pipe, a diffusion part 1 and a diffusion part 2 connected to and arranged on the connecting pipe and arranged in layers; the horizontal height of the diffusion part 2 is greater than the horizontal height of the diffusion part 1;

[0009] The top of the first diffuser portion and the top of the second diffuser portion are both provided with air outlet holes.

[0010] As a further improvement of the above technical solution:

[0011] The first diffuser and the second diffuser are both S-shaped coils.

[0012] The second diffuser is rotatably arranged on the connecting pipe.

[0013] The second diffusion part is provided with a limiting component for limiting the position of the second diffusion part.

[0014] The limiting assembly includes a base fixedly connected to the second diffusion part, a clamping block slidably arranged inside the base, a spring arranged inside the base and located at one end of the clamping block, and a clamping slot opened inside the cooling box.

[0015] The beneficial effects of the embodiments of the utility model are:

[0016] In actual use, the air inlet pipe delivers the low-temperature nitrogen into the connecting pipe, and then it is discharged through the air outlet holes on the top of the diffuser part 1 and the diffuser part 2, that is, the low-temperature nitrogen can be evenly diffused into the interior of the cooling box through the diffuser part 1 and the diffuser part 2. At the same time, since the diffuser part 1 and the diffuser part 2 are located under each layer of battery cells, it is convenient to quickly and evenly cool down each layer of battery cells, thereby improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the cooling box of the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of the limit assembly of the utility model.

[0020] In the figure: 1. cooling box; 2. cooling circulation system; 21. air inlet pipe; 22. air outlet pipe; 23. compression refrigerator; 3. turnover vehicle; 4. diffusion assembly; 41. connecting pipe; 42. diffusion part 1; 43. diffusion part 2; 44. air outlet; 5. limiting assembly; 51. base; 52. block; 53. spring; 54. slot. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0022] See also Figures 1 to 3The embodiment of the utility model discloses a post-baking cooling device for a battery cell, comprising a cooling box 1, a cooling circulation system 2 connected to and arranged on the cooling box 1, and a turnover vehicle 3 for placing the battery cell and used in conjunction with the cooling box 1. The cooling circulation system 2 comprises an air inlet pipe 21 connected to and arranged on the cooling box 1, an air outlet pipe 22 connected to and arranged on the cooling box 1, and a compression refrigerator 23 arranged on the air inlet pipe 21; a diffusion component 4 for diffusing the gas passed from the air inlet pipe 21 into the cooling box 1 is arranged inside the cooling box 1; the turnover vehicle 3 with the battery cell placed is pushed into the cooling box 1, and then the cooling circulation system 2 is started to pass low-temperature nitrogen into the cooling box 1, so as to cool the battery cell; after the nitrogen is passed into the air inlet pipe 21, the nitrogen is cooled by the compression refrigerator 23 and then passed into the cooling box 1;

[0023] The diffusion assembly 4 includes a connecting pipe 41 disposed inside the cooling box 1 and connected to the air intake pipe 21, a diffusion part 1 42 and a diffusion part 2 43 which are connected and arranged on the connecting pipe 41 and arranged in layers; the horizontal height of the diffusion part 2 43 is greater than the horizontal height of the diffusion part 1 42; multiple layers of battery cells are placed on the turnover vehicle 3, and the diffusion part 1 42 and the diffusion part 2 43 are respectively located below each layer of battery cells;

[0024] The top of the diffuser 1 42 and the top of the diffuser 2 43 are both provided with air outlet holes 44;

[0025] In actual use, the air inlet pipe 21 delivers the low-temperature nitrogen into the connecting pipe 41, and then discharges it through the air outlet 44 on the top of the diffuser part 1 42 and the diffuser part 2 43, that is, the low-temperature nitrogen can be evenly diffused into the interior of the cooling box 1 through the diffuser part 1 42 and the diffuser part 2 43. At the same time, since the diffuser part 1 42 and the diffuser part 2 43 are located below each layer of battery cells, it is convenient to quickly and evenly cool down each layer of battery cells, thereby improving the cooling effect.

[0026] As a further illustration of this application:

[0027] The diffuser part 1 42 and the diffuser part 2 43 are both S-shaped coils, so that the air outlet holes 44 on the diffuser part 1 42 can be evenly distributed below the battery cells, thereby improving the cooling effect on the battery cells.

[0028] As a further illustration of this application:

[0029] The second diffusion part 43 is rotatably arranged on the connecting tube 41; if only a single-layer battery cell is arranged on the turnover vehicle 3, the second diffusion part 43 can be rotated so that the second diffusion part 43 is rotated 180° and the air outlet 44 faces downward. At this time, the second diffusion part 43 and the first diffusion part 42 are respectively located on the upper and lower sides of the battery cell, so that low-temperature nitrogen is sprayed from the upper and lower sides to cool the battery cell, thereby improving the cooling effect when cooling the single-layer battery cell.

[0030] As a further illustration of this application:

[0031] The second diffuser 43 is provided with a limiting assembly 5 for limiting the position of the second diffuser 43 . The limiting assembly 5 is used to limit the direction of the second diffuser 43 so that the air outlet 44 on the second diffuser 43 faces upward or downward.

[0032] As a further illustration of this application:

[0033] The limiting assembly 5 includes a base 51 fixedly connected to the diffuser part 43, a block 52 slidably arranged inside the base 51, a spring 53 arranged inside the base 51 and located at one end of the block 52, and a slot 54 opened inside the cooling box 1; there are two slots 54, when the diffuser part 43 rotates, the block 52 is separated from one of the slots 54, and when the diffuser part 43 rotates 180°, the block 52 is inserted into the other slot 54, so that the diffuser part 43 can be limited.

[0034] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0037] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A post-baking cooling device for battery cells, comprising a cooling box (1), a cooling circulation system (2) connected to the cooling box (1), and a turnover vehicle (3) for placing the battery cells and used in conjunction with the cooling box (1), wherein the cooling circulation system (2) comprises an air inlet pipe (21) connected to the cooling box (1), an air outlet pipe (22) connected to the cooling box (1), and a compression refrigerator (23) arranged on the air inlet pipe (21); characterized in that: The cooling box (1) is provided with a diffusion component (4) for diffusing the gas introduced into the cooling box (1) through the air intake pipe (21); The diffusion assembly (4) comprises a connecting pipe (41) arranged inside the cooling box (1) and connected to the air intake pipe (21), a diffusion part 1 (42) and a diffusion part 2 (43) which are arranged in layers and are connected to the connecting pipe (41); the horizontal height of the diffusion part 2 (43) is greater than the horizontal height of the diffusion part 1 (42); The top of the diffusion part 1 (42) and the top of the diffusion part 2 (43) are both provided with air outlet holes (44).

2. The battery cell cooling device after baking according to claim 1, characterized in that: The diffuser part 1 (42) and the diffuser part 2 (43) are both S-shaped coils.

3. The battery cell cooling device after baking according to claim 1, characterized in that: The second diffuser (43) is rotatably disposed on the connecting pipe (41).

4. The battery cell cooling device after baking according to claim 3, characterized in that: The second diffuser portion (43) is provided with a limiting component (5) for limiting the position of the second diffuser portion (43).

5. The battery cell cooling device after baking according to claim 4, characterized in that: The limit assembly (5) comprises a base (51) fixedly connected to the second diffuser portion (43), a clamping block (52) slidably arranged inside the base (51), a spring (53) arranged inside the base (51) and located at one end of the clamping block (52), and a clamping groove (54) opened inside the cooling box (1).

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