Device for lithium ion battery formation

Abstract

The utility model relates to a device for forming a lithium ion battery, which comprises a plurality of heating elements, the plurality of heating elements are sequentially arranged from bottom to top and heat the lithium ion battery, and the heating temperatures of the plurality of heating elements are sequentially reduced from bottom to top. According to the lithium ion battery formation device, the plurality of heating pieces are arranged to heat the lithium ion battery, and during formation, a temperature field of which the temperature is gradually reduced from bottom to top is formed outside the lithium ion battery, so that the bottom gas production rate of the battery can be improved, the bottom and top gas exhaust consistency effect is achieved, and the gas production rate of the lithium ion battery is improved; therefore, the formation efficiency of the lithium ion battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery formation, in particular to a device for lithium ion battery formation. Background Art

[0002] During the formation process of the blade battery after liquid injection, since the battery cell is placed vertically, due to the effect of gravity, the distance (thickness) between the positive and negative electrodes of the electrolyte membrane at the bottom of the battery cell is relatively large, and the gas production rate at the bottom is relatively low during formation, while the gas production rate at the top of the battery cell is high. At the same time, the length of the blade battery is longer than that of the traditional VDA size battery cell. Due to the size effect of the battery cell, it is more likely that the gas in the blade battery cell will not be easily discharged during formation. Utility Model Content

[0003] Based on this, it is necessary to provide a device for lithium-ion battery formation to address the technical problems that during the current blade battery formation process after liquid injection, the gas production rate at the bottom is low, the gas production rate at the top of the battery cell is high, and the gas is difficult to exhaust.

[0004] The utility model provides a device for lithium ion battery formation, which comprises a plurality of heating elements, which are arranged sequentially from bottom to top and heat the lithium ion battery, and the heating temperatures of the plurality of heating elements decrease sequentially from bottom to top.

[0005] As a further improvement of the above solution of the utility model, the device also includes a sleeve, which is sleeved on the outside of the lithium-ion battery, and a plurality of heating elements are arranged on the sleeve in sequence from bottom to top.

[0006] As a further improvement of the above solution of the utility model, at least two heating elements are provided.

[0007] As a further improvement of the above scheme of the utility model, the sleeve has a rectangular structure, an opening for inserting the lithium-ion battery is opened at the top of the sleeve, and its interior is constructed as a formation chamber compatible with the lithium-ion battery, and a plurality of heating elements are arranged in sequence from bottom to top on a wide side of the sleeve.

[0008] As a further improvement of the above solution of the utility model, an elastic buffer layer is arranged on the inner wall of the formation chamber, and the thickness of the elastic buffer layer decreases gradually from the bottom end of the sleeve to the top end of the sleeve.

[0009] As a further improvement of the above solution of the utility model, the cross section of the elastic buffer layer is sloped, and the angle of the slope is 0°-10°.

[0010] As a further improvement of the above solution of the utility model, the height of the sleeve is 300mm-960mm.

[0011] As a further improvement of the above solution of the utility model, it also includes a base, and the sleeve is vertically arranged on the base.

[0012] As a further improvement of the above solution of the utility model, there are multiple sleeves, and the multiple sleeves are distributed in an array on the base.

[0013] As a further improvement of the above solution of the utility model, in each row of the array, the wide sides of any two adjacent sleeves are arranged opposite to each other and a heat insulation pad is arranged between any two adjacent sleeves, and the heat insulation pad is connected to the two adjacent sleeves.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model heats the lithium-ion battery by arranging a plurality of heating elements. During formation, a temperature field is formed outside the lithium-ion battery with the temperature decreasing from bottom to top, which can increase the gas production rate at the bottom of the battery, achieve the effect of consistent exhaust at the bottom and the top, increase the gas production rate of the lithium-ion battery, and thus improve the formation efficiency of the lithium-ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a device for lithium-ion battery formation proposed in an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the structure of a sleeve in a device for forming a lithium-ion battery proposed in an embodiment of the utility model;

[0018] Figure 3 A cross-sectional view of a sleeve in a device for forming a lithium-ion battery according to an embodiment of the utility model;

[0019] Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle;

[0020] Figure 5 for Figure 3 Enlarged schematic diagram of point B in the middle.

[0021] Figure numerals: 1. sleeve; 2. lithium-ion battery; 3. heating element; 4. elastic buffer layer; 5. base; 6. thermal insulation pad. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0025] This embodiment provides a device for lithium-ion battery formation to address the technical problems that during the formation process of blade batteries after liquid injection, the gas production rate at the bottom is low, the gas production rate at the top of the battery cell is high, and the gas is difficult to exhaust.

[0026] Reference Figure 1 , a device for lithium-ion battery formation proposed in this embodiment includes a base 5 and a plurality of sleeves 1.

[0027] Combination Figure 2 The sleeve 1 is of rectangular structure, the height of the sleeve 1 is 300mm-960mm, an opening for inserting the lithium-ion battery 2 is provided at the top of the sleeve 1, and the interior thereof is constructed as a formation chamber adapted to the lithium-ion battery 2, and three heating elements 3 capable of generating heat when powered are arranged on one wide side of the sleeve 1, the three heating elements 3 are arranged at intervals along the vertical direction on the sleeve 1, and the heating power of the heating elements 3 increases successively from bottom to top.

[0028] Through the above structural arrangement, when the lithium-ion battery is formed after the liquid is injected, the sleeve 1 is sleeved on the outside of the lithium-ion battery 2, and the three heating elements 3 are powered on to generate heat to heat the lithium-ion battery 2, forming a gradient temperature field in which the temperature decreases from bottom to top, which can increase the gas production rate at the bottom of the battery 2, achieve the effect of consistent exhaust at the bottom and the top, increase the gas production rate of the lithium-ion battery 2, and thus improve the formation efficiency of the lithium-ion battery 2.

[0029] The plurality of sleeves 1 are arranged in an array on the base 5. In each row of the array, the wide sides of any two adjacent sleeves 1 are arranged opposite to each other and a heat insulating pad 6 is arranged between any two adjacent sleeves 1. The heat insulating pad 6 is connected to the two adjacent sleeves 1. In this way, it is possible to form a plurality of lithium-ion batteries 2 at the same time.

[0030] Combination Figure 3-Figure 5 An elastic buffer layer 4 is provided on the inner wall of the formation chamber of the sleeve 1. The thickness of the elastic buffer layer 4 decreases from the bottom end of the sleeve 1 to the top end of the sleeve 1, so that the cross section of the elastic buffer layer 4 is sloped, and the angle of the slope is 0°-10°. In this way, the battery can be fixed in position, the battery shaking amplitude in the sleeve 1 can be reduced, and the battery safety can be ensured. The device for lithium-ion battery formation of this embodiment can also be used directly for lithium-ion battery injection. The battery is restrained by the sleeve 1 and the elastic buffer layer 4 to prevent the aluminum shell of the battery core from being deformed during injection, and the flatness of the battery surface can be ensured.

[0031] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A device for lithium-ion battery formation, characterized in that: The invention comprises a plurality of heating elements, which are arranged in sequence from bottom to top and heat the lithium-ion battery, and the heating temperatures of the plurality of heating elements decrease in sequence from bottom to top.

2. The device for lithium-ion battery formation according to claim 1, characterized in that: The device further comprises a sleeve (1), the sleeve (1) being sleeved on the outside of the lithium-ion battery (2), and a plurality of heating elements being arranged on the sleeve (1) in sequence from bottom to top.

3. The device for lithium-ion battery formation according to claim 1, characterized in that: At least two heating elements (3) are provided.

4. The device for lithium-ion battery formation according to claim 2, characterized in that: The sleeve (1) has a rectangular structure, an opening for inserting a lithium-ion battery (2) is provided at the top of the sleeve (1), and the interior of the sleeve (1) is configured as a formation chamber adapted to the lithium-ion battery (2), and a plurality of heating elements are arranged in sequence from bottom to top on a wide side of the sleeve (1).

5. The device for lithium-ion battery formation according to claim 4, characterized in that: An elastic buffer layer (4) is arranged on the inner wall of the formation chamber, and the thickness of the elastic buffer layer (4) decreases gradually from the bottom end of the sleeve (1) to the top end of the sleeve (1).

6. The device for lithium-ion battery formation according to claim 4, characterized in that: The cross section of the elastic buffer layer (4) is in a slope shape, and the angle of the slope is 0°-10°.

7. The device for lithium-ion battery formation according to claim 2, characterized in that: The height of the sleeve (1) is 300 mm-960 mm.

8. The device for lithium-ion battery formation according to claim 2, characterized in that: It also comprises a base (5), and the sleeve (1) is vertically arranged on the base (5).

9. The device for lithium-ion battery formation according to claim 8, characterized in that: There are multiple sleeves (1), and the multiple sleeves (1) are distributed in an array on the base (5).

10. The device for lithium-ion battery formation according to claim 9, characterized in that: In each row of the array, the wide sides of any two adjacent sleeves (1) are arranged opposite to each other and a heat insulation pad (6) is arranged between any two adjacent sleeves (1), and the heat insulation pad (6) is connected to the two adjacent sleeves (1).

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