A tolerance compensation device suitable for tight assembly of lithium batteries

Abstract

The utility model provides a kind of public tolerance compensation device suitable for lithium battery tight assembly, including shell;Battery pack is arranged in the shell interior;Preloading plate is arranged in the shell and located the battery pack one side;Compensation plate is arranged in the shell and located between shell and preloading plate;The utility model's public tolerance compensation device can ensure that battery pack is tightly assembled in shell, improve assembly accuracy and the stability of battery pack, suitable for the tight assembly of various lithium batteries;The assembly gap formed by the tolerance accumulation in the assembly process of square shell lithium battery or other lithium battery PACK in general assembly is solved, thereby the problem of affecting tight assembly, and the complicated and dangerous assembly process in the assembly process of the type conventional general assembly process is simplified, the problem that the type battery pack general assembly process cannot quantize assembly tightness is avoided, while guaranteeing product quality consistency, improve production efficiency, improve the security of this type of assembly process.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery assembly technology, specifically relating to a tolerance compensation device suitable for tight assembly of lithium batteries. Background Technology

[0002] Lithium zinc batteries possess advantages such as high operating voltage, high power, high energy density, long cycle life, and environmental friendliness, and are widely used in industries such as automobiles, ships, aircraft, and even defense. Currently, lithium batteries mainly come in various structural types, including button cells, cylindrical cells, rectangular cells, and soft-pack cells. With the increasingly widespread application of lithium batteries, the requirements for assembly precision are also becoming more stringent. During the assembly process, due to manufacturing tolerances, gaps may exist between the battery pack and the casing, affecting the stability and safety of the battery pack. Therefore, a device capable of compensating for manufacturing tolerances is needed to ensure that the battery pack is tightly assembled within the casing.

[0003] When designing lithium battery packs, for the purposes of product versatility, miniaturization, and lightweighting, prismatic batteries or other types of battery packs are not designed with dedicated mechanical interfaces for fixing. In assembly, a tight-fitting design mode is often adopted, using rubber sheets, cardboard, laminates, or other thin materials to tightly assemble the battery pack. The purpose is to ensure that the lithium batteries and the battery pack do not shift relative to each other during vibration, flipping, or other events that may cause displacement, thus affecting the performance and safety of the battery pack. The advantage of this design mode is that it is simple and universal, but the disadvantages are also obvious: the assembly is difficult and time-consuming, the quality of tight-fitting assembly depends more on the skill level of the assemblers, which is difficult to quantify, and the assembly consistency is poor. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a tolerance compensation device suitable for tight assembly of lithium batteries.

[0005] This utility model is achieved through the following technical solution.

[0006] A tolerance compensation device suitable for tight assembly of lithium batteries, comprising:

[0007] 4. Outer shell;

[0008] Battery pack 3 is disposed inside the housing 4;

[0009] The pre-installed plate 1 is disposed inside the housing 4 and located on one side of the battery pack 3;

[0010] Compensation plate 2 is disposed inside the outer casing 4 and located between the outer casing 4 and the pre-installed plate 1.

[0011] It also includes protection board A and protection board B;

[0012] The protection plate A is disposed inside the outer casing 4 and is located between the battery pack 3 and the pre-installed plate 1;

[0013] The protection plate B is disposed inside the outer casing 4 and located between the outer casing 4 and the battery pack 3.

[0014] One side of the pre-installed plate 1 is provided with interlocking teeth, and the other side of the compensation plate 2 combined with the pre-installed plate 1 is provided with interlocking teeth. The pre-installed plate 1 and the compensation plate 2 are assembled together by interlocking with each other.

[0015] The cross-sectional shapes of the pre-installed plate 1 and the compensation plate 2 are both quasi-right triangles, and the meshing teeth are all located on the hypotenuse of the quasi-right triangles.

[0016] Both the pre-installed plate 1 and the compensation plate 2 are made of metal.

[0017] Both protective plate A and protective plate B are made of rubber or cardboard.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The tolerance compensation device of this utility model can ensure that the battery pack is tightly assembled inside the casing, improve the assembly accuracy and stability of the battery pack, and is suitable for tight assembly of various lithium batteries.

[0020] 2. It solves the problem of assembly gaps caused by the accumulation of tolerances during the assembly process of square-shell lithium batteries or other lithium battery packs, which affects tight assembly;

[0021] 3. It simplifies the cumbersome and dangerous assembly process in the conventional assembly process of this type of battery pack, avoids the problem of not being able to quantify the tightness of the assembly in the assembly process of this type of battery pack, improves production efficiency and safety of this type of group assembly process while ensuring product quality consistency.

[0022] 4. It solves the problem of the previous design mode in which the assembly quality of lithium battery packs was guaranteed solely by the skill level of the assembly personnel, thereby reducing assembly time and labor costs and improving the safety of the production process. Attached Figure Description

[0023] Figure 1 This is an assembly model diagram of the tolerance compensation device for tight assembly of lithium battery according to an embodiment of the present invention;

[0024] Figure 2 This is a front view of the assembly model of the tolerance compensation device for tight assembly of lithium battery according to an embodiment of the present utility model.

[0025] Figure 3 This is a structural diagram of the combination of the pre-installed plate 1 and the compensation plate 2 in an embodiment of the present invention;

[0026] Figure 4 This is a front view of the combined structure of the pre-installed plate 1 and the compensation plate 2 in an embodiment of the present utility model;

[0027] In the diagram: 1-Pre-installed plate, 2-Compensation plate, 3-Battery pack, 4-Outer casing. Detailed Implementation

[0028] The technical solution of this utility model is further described below with reference to the accompanying drawings and embodiments, but the scope of protection is not limited to the description.

[0029] Example 1 Reference Figures 1 to 4

[0030] like Figure 1 The diagram shown is an assembly model of a tolerance compensation device for tight assembly of lithium batteries according to an embodiment of the present invention. The tolerance compensation device is suitable for tight assembly of lithium batteries and includes:

[0031] Housing 4; Housing 4 is a square three-dimensional structure with an opening at the top. Housing 4 is used to protect the battery pack 3, enhance the safety of the battery pack 3, and improve the battery pack's driving range.

[0032] Battery pack 3 is disposed inside the housing 4;

[0033] The pre-installed plate 1 is disposed inside the housing 4 and located on one side of the battery pack 3;

[0034] Preferably, the pre-assembled plate 1 is made of metal;

[0035] Compensation plate 2 is disposed inside the outer casing 4 and located between the outer casing 4 and the pre-installed plate 1;

[0036] Preferably, the compensation plate 2 is made of metal;

[0037] Combination such as Figure 2 The above is a front view of the assembly model of the tolerance compensation device for tight assembly of lithium battery according to an embodiment of the present utility model. The tolerance compensation device may also use a protective plate A and a protective plate B made of flexible material. The protective plate A is disposed in the outer shell 4 and located between the battery pack 3 and the pre-installed plate 1, and the protective plate B is disposed inside the outer shell 4 and located between the outer shell 4 and the battery pack 3.

[0038] Preferably, both the protection plate A and the protection plate B are rubber sheets or cardboard. The addition of the protection plate A and the protection plate B made of flexible materials can better protect the battery pack 3 and prevent one side of the pre-installed plate 1 from damaging the battery pack 3 during the combination of the pre-installed plate 1 and the compensation plate 2. It also prevents the horizontal pressure generated during the combination of the pre-installed plate 1 and the compensation plate 2 from damaging the inner side of the outer casing 4 to the battery pack 3.

[0039] like Figure 3The diagram shows the combined structure of the pre-installed plate 1 and the compensation plate 2 according to an embodiment of the present invention. The pre-installed plate 1 is provided with a biting tooth on one side, and the compensation plate 2 is provided with a biting tooth on the side where it is combined with the pre-installed plate 1. The pre-installed plate 1 and the compensation plate 2 are assembled together by mutual biting. The pre-installed plate 1 and the compensation plate 2 are both made of metal, which can provide better biting force while ensuring strength.

[0040] like Figure 4 This is a front view of the combined structure of the pre-installed plate 1 and the compensation plate 2 according to an embodiment of the present invention. The cross-sectional shapes of the pre-installed plate 1 and the compensation plate 2 are both quasi-right triangles, and the interlocking teeth are all set on the hypotenuse of the quasi-right triangle, that is, the inclined plane in the perspective view. Setting the interlocking teeth on the inclined plane facilitates assembly. The inclined plane guides the parts to be more easily aligned and inserted, reducing assembly difficulty and improving production efficiency. It also enhances connection stability. Compared with vertical plane interlocking, the inclined plane can generate component force when subjected to force, making the interlocking tighter and improving the overall stability of the structure. The cross-sectional shape after interlocking is quasi-rectangular.

[0041] Preferably, the protection plate B is first installed inside one side of the outer casing 4, and then the battery pack 3, protection plate A and pre-installed plate 1 are installed in sequence on one side of the protection plate B. Finally, the compensation plate 2 is installed from top to bottom, with the outer casing 4 as a support. Through the gradual engagement of the teeth of the pre-installed plate 1 and the compensation plate 2, a horizontal compressive force is generated, thereby achieving the purpose of tightly assembling the battery pack 3 and the outer casing 4.

Claims

1. A tolerance compensation device suitable for tight assembly of lithium batteries, characterized in that, include: Outer shell (4); The battery pack (3) is disposed inside the housing (4); A pre-installed plate (1) is disposed inside the housing (4) and located on one side of the battery pack (3); The compensation plate (2) is disposed inside the housing (4) and located between the housing (4) and the pre-installed plate (1).

2. The tolerance compensation device for tight assembly of lithium batteries as described in claim 1, characterized in that, Also includes: Protection board A and protection board B; The protection plate A is disposed inside the outer casing (4) and located between the battery pack (3) and the pre-installed plate (1); The protection plate B is disposed inside the outer casing (4) and located between the outer casing (4) and the battery pack (3).

3. The tolerance compensation device for tight assembly of lithium batteries as described in claim 1, characterized in that: One side of the pre-installed plate (1) is provided with a biting tooth, and the side of the compensating plate (2) combined with the pre-installed plate (1) is provided with a biting tooth. The pre-installed plate (1) and the compensating plate (2) are assembled together by biting each other.

4. A tolerance compensation device suitable for tight assembly of lithium batteries as described in claim 1 or 3, characterized in that: The cross-sectional shapes of the pre-installed plate (1) and the compensation plate (2) are both quasi-right triangles, and the biting teeth are all set on the hypotenuse of the quasi-right triangle.

5. A tolerance compensation device suitable for tight assembly of lithium batteries as described in claim 1, characterized in that: Both the pre-installed plate (1) and the compensation plate (2) are made of metal.

6. A tolerance compensation device suitable for tight assembly of lithium batteries as described in claim 2, characterized in that: Both protective plate A and protective plate B are made of rubber or cardboard.

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