Cell capacity grading constant temperature device

Abstract

The embodiment discloses a battery core capacity grading constant temperature device, which comprises a disc body and a first partition plate, an accommodating cavity is defined in the disc body, the inner wall of the disc body is provided with a hollow first flow channel, and the disc body is respectively provided with a water inlet pipe and a water outlet pipe which are communicated with the first flow channel; the first partition plate is arranged in the containing cavity in the first direction so as to divide the containing cavity into containing spaces for containing battery cells, a hollow second flow channel is formed in the first partition plate, and the second flow channel is communicated with the first flow channel; and under the condition that the battery cell is placed in the placing space, the outer surface of the battery cell is respectively propped against the first partition plate and the inner wall of the tray body. Compared with a current air cooling mode, the technical scheme of the embodiment has higher heat exchange efficiency and energy saving performance, can ensure the uniformity and consistency of the capacity grading temperature of each battery cell, and ensures the accuracy of a measurement result.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cell capacity division and constant temperature device. Background Art

[0002] With the development of electric vehicles, batteries have become the key to the sustainable development of the automotive industry. For electric vehicles, battery production technology is an important factor related to its development. At present, in the production process of lithium batteries, it is necessary to go through the processes of lithium battery formation, constant capacity (division), and load adjustment (charging and discharging). However, due to the requirements of battery technology, all batteries need to maintain a certain temperature uniformity. During the formation and division of the battery, a large amount of heat will be generated, which can easily lead to inaccurate battery diversion capacity. Therefore, it is necessary to use a temperature control device to control the temperature of the factory to a constant temperature environment of 25℃±3℃ for diversion. However, at present, only by installing air conditioners in the factory to maintain the constant temperature environment of the factory with air conditioners, the investment is large, and the uniformity of the temperature of each battery diversion cannot be guaranteed, and the required constant temperature accuracy cannot be achieved. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a battery cell capacity division and constant temperature device.

[0004] The present application provides a cell capacity division and constant temperature device, comprising:

[0005] A disc body, an accommodating cavity is defined inside the disc body, a hollow first flow channel is provided on the inner wall of the disc body, and a water inlet pipe and a water outlet pipe connected to the first flow channel are respectively provided on the disc body;

[0006] A first partition is arranged in the accommodating cavity along a first direction to divide the accommodating cavity into a placement space for placing the battery cell, and a hollow second flow channel is formed on the first partition, and the second flow channel is connected to the first flow channel;

[0007] Wherein, when the battery core is placed in the placement space, the outer surface of the battery core is respectively in contact with the first partition and the inner wall of the disk.

[0008] In one embodiment, the battery cell volume division and constant temperature device also includes a plurality of second partitions symmetrically arranged on both sides of the first partition, and the second partitions are located in the placement space along the first direction to divide the placement space into a plurality of placement areas for placing the battery cells, and a hollow third flow channel is formed on the second partition, and the third flow channel is connected to the first flow channel and the second flow channel.

[0009] In one embodiment, the widths of the first flow channel, the second flow channel, and the third flow channel are all between 3 mm and 5 mm.

[0010] In one embodiment, it further includes a plurality of reinforcing strips spaced apart along a first direction on the surface of the first partition, and one side edge of the second partition passes through the reinforcing strips and is connected to the first partition.

[0011] In one embodiment, the water inlet pipe and the water outlet pipe are arranged on opposite sides of the disc, and the water inlet pipe and the water outlet pipe are arranged diagonally.

[0012] In one embodiment, the outer surface of the disk body is provided with a first reinforcing rib and a second reinforcing rib along the first direction and the second direction respectively, and the first reinforcing rib and the second reinforcing rib are intersected and connected as a whole; wherein the first direction intersects with the second direction.

[0013] In one embodiment, two symmetrical holding pieces are provided on the outer surface of the tray body, and recessed positions are formed on the holding pieces.

[0014] In one embodiment, a support pad is further included, and the support pad is fixedly connected to the bottom surface of the disk body.

[0015] Compared with the prior art, the above technical solution provided by the embodiment of the present application has the following beneficial effects:

[0016] A first flow channel and a second flow channel that are interconnected are cleverly arranged on the inner wall of the disk and the first partition, and flowing coolant is introduced into the first flow channel and the second flow channel through a water inlet pipe and a water outlet pipe to take away the heat generated by the battery cell capacitor. Compared with the current air cooling method, it has higher heat exchange efficiency and energy saving, can ensure the uniformity of the divided capacity temperature of each battery cell, and ensure the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an embodiment of a battery cell capacity division and temperature control device of the present application;

[0018] Figure 2 It is a top view schematic diagram of a battery cell capacity division and constant temperature device of the present application;

[0019] Figure 3 It is a structural schematic diagram of another embodiment of a battery cell capacity division and temperature control device of the present application.

[0020] Numbers in the figure:

[0021] 10. disk body; 10a. accommodating cavity; 20. water inlet pipe; 30. water outlet pipe; 40. first partition; 50. second partition; 60. placement area; 70. reinforcement strip; 80. gripping piece; 80a. recessed position; 90. support pad; 100. battery cell; 200. first reinforcement rib; 300. second reinforcement rib. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] Please refer to Figure 1 and Figure 2 The embodiment of the present application provides a cell volume division and constant temperature device, including a tray 10 and a first partition 40. The tray 10 defines a receiving cavity 10a. The inner wall of the tray 10 is provided with a hollow first flow channel, and the tray 10 is provided with a water inlet pipe 20 and a water outlet pipe 30 connected with the first flow channel. The first partition 40 is arranged in the receiving cavity 10a along a first direction to divide the receiving cavity 10a into a placement space for placing the cell 100, and a hollow second flow channel is formed on the first partition 40, and the second flow channel is connected with the first flow channel. When the cell 100 is placed in the placement space, the outer surface of the cell 100 abuts against the first partition 40 and the inner wall of the tray 10, respectively.

[0025] Exemplarily, a first partition 40 is provided in the accommodating cavity 10a to divide the accommodating cavity 10a into a placement space for placing the battery cell 100, and a hollow second flow channel is formed on the first partition 40. Since the second flow channel is interconnected with the first flow channel, after the coolant is introduced into the water from the outside through the water inlet pipe 20, the coolant flows through the first flow channel and the second flow channel and then flows out from the water outlet pipe 30, so that the coolant forms a flowing state, and the heat conducted to the coolant is taken away, thereby ensuring that the divided volume temperature of each battery cell 100 is uniform and consistent.

[0026] It should be noted that the flow rate of the coolant introduced can be adjusted accordingly according to the amount of heat generated by the battery cell 100 to ensure the temperature consistency during the capacity division process of the battery cell 100. For example: the temperature at the water outlet pipe 30 can be detected (for example, using a temperature sensor). If the temperature of the coolant at the water outlet pipe 30 is too high, the flow rate of the coolant entering from the water inlet can be increased to speed up the flow of the coolant to quickly take out the heat; if the temperature of the coolant at the water outlet pipe 30 is lower than the capacity division temperature value, the water inlet flow rate at the water inlet can be reduced to reduce the speed at which the coolant takes away the heat, so that the battery cell 100 can be maintained at a constant temperature environment for capacity division. In addition, the way to allow the coolant to flow through the first flow channel and the second flow channel can be to use a connecting pipe to connect the water inlet pipe 20 and the water outlet pipe 30 respectively, and then form a circulating flow state under the action of a water pump.

[0027] The battery cell 100 capacity distribution tray based on the above technical features cleverly sets a first flow channel and a second flow channel that are interconnected on the inner wall of the tray body 10 and the first partition plate 40, and flows coolant into the first flow channel and the second flow channel through the water inlet pipe 20 and the water outlet pipe 30 to take away the heat generated by the battery cell 100 capacitor. Compared with the current air cooling method, it has higher heat exchange efficiency and energy saving, can ensure the uniformity of the capacity distribution temperature of each battery cell 100, and ensure the accuracy of the measurement results.

[0028] In one embodiment, the battery cell volume division and constant temperature device also includes a plurality of second partitions 50 symmetrically arranged on both sides of the first partition 40, and the second partitions 50 are located in the placement space along the first direction to divide the placement space into a plurality of placement areas 60 for placing the battery cells 100, and a hollow third flow channel is formed on the second partition 50, and the third flow channel is connected to the first flow channel and the second flow channel.

[0029] It should be noted that the "plurality" mentioned above refers to two or more than two, and the specific number can be determined according to the number of battery cells 100 to be placed. For example, if there are 8 battery cells 100 to be placed at one time, 4 second partitions 50 are symmetrically arranged on both sides of the first partition 40, and the two placement spaces are divided into 8 placement areas 60 by the separation of the second partitions 50, and then the 8 battery cells 100 are respectively placed in the corresponding 8 placement areas 60 for capacity division.

[0030] Exemplarily, after the battery cell 100 that needs to be divided is placed in the placement area 60, the outer surface of the capacitor cell 100 contacts the first partition 40, the second partition 50 and the inner wall of the disk body 10 respectively. Since the second flow channel, the third flow channel and the first flow channel in the first partition 40, the second partition 50 and the inner wall of the disk body 10 are interconnected, after the flowing coolant is introduced from the outside, the heat generated by the battery cell 100 will be conducted to the coolant, thereby taking away the heat and ensuring that the divided capacity temperature of each battery cell 100 is uniform and consistent.

[0031] In one embodiment, the widths of the first flow channel, the second flow channel, and the third flow channel are all between 3 mm and 5 mm. The widths of the first flow channel, the second flow channel, and the third flow channel are set within the above ranges so that the coolant can pass smoothly to form a circulating flow state to take away the heat generated by the battery cell 100, which can meet the heat dissipation requirements for battery cells 100 of most thicknesses.

[0032] In one embodiment, a plurality of reinforcing strips 70 are arranged on the surface of the first separator 40 at intervals along the first direction, and one side of the second separator 50 passes through the reinforcing strips 70 and is connected to the first separator 40. In this way, the strength of the first separator 40 can be effectively enhanced to prevent the first separator 40 from being squeezed and deformed during the process of placing the battery cell 100, resulting in the first flow channel being blocked and unable to allow the coolant to flow through, resulting in the inability to take away the heat generated by the battery cell 100 during the discharge process.

[0033] In one embodiment, the water inlet pipe 20 and the water outlet pipe 30 are disposed on opposite sides of the disc body 10, and the water inlet pipe 20 and the water outlet pipe 30 are disposed diagonally. In this way, the external coolant (such as cooling water) enters the first flow channel from the water inlet pipe 20, flows through the second flow channel and the third flow channel, and then flows out from the water outlet pipe 30, so that the coolant that enters fills the inner wall of the disc body 10, avoiding the situation where no coolant flows into a part of the inner wall of the disc body 10, ensuring that the coolant can completely take away the heat of the battery cell 100 placed in the accommodating cavity 10a, so that the battery cell 100 can be maintained in a constant temperature environment for volume distribution.

[0034] Please refer to Figure 3 In one embodiment, the outer surface of the disk body 10 is provided with a first reinforcing rib 200 and a second reinforcing rib 300 along a first direction and a second direction respectively, and the first reinforcing rib 200 and the second reinforcing rib 300 are intersected and connected as a whole; wherein the first direction intersects with the second direction.

[0035] It should be noted that the “first direction” mentioned in the present application may refer to the length direction of the disk body 10, and the “second direction” may refer to the height direction of the disk body 10. Figure 3 The X and Y directions in the .

[0036] Exemplarily, intersecting first reinforcing ribs 200 and second reinforcing ribs 300 are respectively provided on the outer surface of the disc body 10, so that the strength of the disc body 10 is improved under the joint action of the first reinforcing ribs 200 and the second reinforcing ribs 300, thereby preventing the disc body 10 from being deformed after being subjected to external squeezing force, thereby causing the first flow channel on the inner wall of the disc body 10 to be unable to supply coolant to flow normally, resulting in the inability to take away the heat generated by the battery cell 100 during the capacity division process, affecting the accuracy of the capacity division.

[0037] In order to facilitate the subsequent transfer of the tray body 10, in one embodiment, two symmetrical gripping members 80 are provided on the outer surface of the tray body 10, and a recessed position 80a is opened on the gripping member 80. It should be noted that the connection between the gripping member 80 and the tray body 10 can be an integrated molding method (such as injection molding) to ensure that the gripping member 80 is more firmly connected to the tray body 10 and avoid the gripping member 80 from breaking when the tray body 10 is transferred. It should be noted that the transfer of the tray body 10 can be done manually, for example: workers reach into the recessed position 80a to hold the gripping member 80 to lift the tray body 10 upward, so as to achieve the movement of the tray body 10; in addition, the lifting head of an auxiliary device (such as a lifting machine) can be used to reach into the recessed position 80a, and then pull up the tray body 10.

[0038] In one embodiment, a support pad 90 is further included, and the support pad 90 is fixedly connected to the bottom surface of the tray body 10. In this way, by fixing the support pad 90 on the bottom surface of the tray body 10, the tray body 10 can be prevented from directly contacting the ground, and the stability of the tray body 10 can be effectively ensured, and the shaking of the battery cell 100 during the capacity division process can be avoided.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A cell capacity division and constant temperature device, characterized in that: include: A disc body, an accommodating cavity is defined inside the disc body, a hollow first flow channel is provided on the inner wall of the disc body, and a water inlet pipe and a water outlet pipe connected to the first flow channel are respectively provided on the disc body; A first partition is arranged in the accommodating cavity along a first direction to divide the accommodating cavity into a placement space for placing the battery cell, and a hollow second flow channel is formed on the first partition, and the second flow channel is connected to the first flow channel; Wherein, when the battery core is placed in the placement space, the outer surface of the battery core is respectively in contact with the first partition and the inner wall of the disk.

2. The battery cell capacity division and constant temperature device according to claim 1, characterized in that: The battery cell volume division and constant temperature device also includes a plurality of second partitions symmetrically arranged on both sides of the first partition, the second partitions are located in the placement space along the first direction to divide the placement space into a plurality of placement areas for placing the battery cells, and a hollow third flow channel is formed on the second partition, and the third flow channel is connected to the first flow channel and the second flow channel.

3. The battery cell capacity division and constant temperature device according to claim 2, characterized in that: The widths of the first flow channel, the second flow channel and the third flow channel are all between 3 mm and 5 mm.

4. The battery cell capacity division and constant temperature device according to claim 2, characterized in that: It also includes a plurality of reinforcing strips spaced apart along a first direction on the surface of the first partition, and one side edge of the second partition passes through the reinforcing strips and is connected to the first partition.

5. The battery cell capacity division and constant temperature device according to claim 1, characterized in that: The water inlet pipe and the water outlet pipe are arranged on opposite sides of the disc, and the water inlet pipe and the water outlet pipe are arranged diagonally.

6. The battery cell capacity division and constant temperature device according to any one of claims 1 to 5, characterized in that: The outer surface of the disk body is provided with a first reinforcing rib and a second reinforcing rib along the first direction and the second direction respectively, and the first reinforcing rib and the second reinforcing rib are intersected and connected into one; wherein the first direction intersects with the second direction.

7. The battery cell capacity division and constant temperature device according to claim 1, characterized in that: The outer surface of the tray body is provided with two symmetrical holding pieces, and the holding pieces are provided with recessed positions.

8. The battery cell capacity division and constant temperature device according to claim 1, characterized in that: It also includes a support pad, which is fixedly connected to the bottom surface of the disk body.

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