Tab direct connection module

Abstract

The utility model discloses a pole lug direct connection module which comprises a battery cell and pouring sealant, a pole lug body is fixed on the battery cell, a fixing plate is arranged on the lower side of the pole lug body, the lower end face of the fixing plate is flush with the lower end face of the battery cell, a supporting piece is vertically fixed on the upper end face of the fixing plate, an elastic piece is fixed on the supporting piece, and the elastic piece is fixed on the battery cell. And the tab body, the fixing plate, the supporting sheet and the elastic sheet are wrapped by pouring sealant to form an integrated structure. According to the tab direct-connection module, parts such as a tab support and a busbar are omitted, the tab direct-connection module has good insulation and voltage resistance characteristics after tab direct-connection, glue packaging and glue solidification, the tabs can be fixed in the whole vehicle using process without shaking, and due to the fact that related electrical structural parts are reduced, the design cost of the module is reduced, and the reliability of the module is improved. In addition, due to the fact that the number of structural parts, the number of material types and the number of technological procedures of the module are reduced, the production efficiency of products can be improved, and the automatic productivity of a production line and the volume utilization rate of the products are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-pack battery core processing, in particular to a tab direct-connection module. Background Art

[0002] At present, soft-pack battery cells are mostly grouped by fixing and guiding them through tab brackets, and then the tabs are welded to the bus to connect the modules in series and parallel. However, this existing conventional design has the disadvantages of high cost, and the complex grouping method leads to the decrease of volume utilization of the whole package and the increase of material cost. Therefore, a tab direct-connected module is designed to better meet the actual use needs. Utility Model Content

[0003] The purpose of the utility model is to provide a tab direct connection module to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a kind of tab direct-connection module, including a battery cell and a potting compound, a tab body is fixed on the battery cell, a fixing plate is arranged on the lower side of the tab body, the lower end surface of the fixing plate is flush with the lower end surface of the battery cell, a supporting sheet is vertically fixed to the upper end surface of the fixing plate, an elastic sheet is fixed on the supporting sheet, and the tab body, the fixing plate, the supporting sheet and the elastic sheet are wrapped by the potting compound into an integrated structure.

[0005] Preferably, a rectangular groove is provided on the side of the battery cell, and the groove can provide a certain gap between the battery cells assembled side by side, thereby facilitating the subsequent air flow and effectively ensuring the heat dissipation effect of the entire module in the subsequent use.

[0006] Preferably, the tab bodies are symmetrically distributed about the center line of the battery cell, and adjacent tab bodies are welded. Through direct welding connection between the tab bodies, there is no need for a bus bracket or a series bus, thereby greatly reducing production costs.

[0007] Preferably, the support sheets are evenly spaced on the fixed plate and in contact with the tab body. The support sheets can be used to support and limit the tab body, thereby avoiding contact between adjacent tab bodies and affecting their performance, and ensuring the stability of the tab body during subsequent glue pouring.

[0008] Preferably, the elastic sheet is symmetrically distributed about the center line of the support sheet, and both the elastic sheet and the support sheet are made of EPP material. Through the action of the elastic sheet and the support sheet, the tab body can be clamped and positioned to ensure the stability of the tab body.

[0009] Preferably, a fastening strip is evenly fixed to one end of the elastic sheet close to the tab body, and the fastening strip is in contact with the tab body. The fastening strip applies force to the tab body, which can further ensure the stability of the connection between the elastic sheet and the tab body.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the tab direct-connection module eliminates components such as tab brackets and bus bars, and has good insulation and voltage resistance properties after the tabs are directly connected and encapsulated with glue. The tabs can be fixed on the vehicle without shaking during use, and because the related electrical structural parts are reduced, the design cost of the module is reduced. Because the module structural parts are reduced, the material types are reduced, and the process steps are reduced, the production efficiency of the product can be improved, and the automation productivity of the production line and the volume utilization of the product are increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a partial cross-section of the three-dimensional structure of the battery cell and the potting glue of the utility model;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the battery core and the potting glue of the utility model;

[0013] Figure 3 This is a schematic diagram of an exploded top view structure of multiple battery cells of the utility model;

[0014] Figure 4 This is a schematic diagram of a three-dimensional structure composed of a fixing plate and a pole ear of the utility model;

[0015] Figure 5 For this utility model Figure 4 Enlarged structural diagram at A in the middle.

[0016] In the figure: 1. battery cell; 101. groove; 2. tab body; 3. fixing plate; 4. supporting sheet; 5. elastic sheet; 501. fastening strip; 6. potting glue. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-Figure 5The utility model provides a technical solution: a tab direct-connection module, including a battery cell 1 and a potting glue 6, a tab body 2 is fixed on the battery cell 1, a fixing plate 3 is arranged on the lower side of the tab body 2, the lower end surface of the fixing plate 3 is flush with the lower end surface of the battery cell 1, a supporting sheet 4 is vertically fixed to the upper end surface of the fixing plate 3, an elastic sheet 5 is fixed on the supporting sheet 4, and the tab body 2, the fixing plate 3, the supporting sheet 4 and the elastic sheet 5 are wrapped by the potting glue 6 to form an integrated structure.

[0019] A rectangular groove 101 is provided on the side of the battery cell 1; the tab bodies 2 are symmetrically distributed about the center line of the battery cell 1, and adjacent tab bodies 2 are welded together;

[0020] When assembling, Figure 1-Figure 3 As shown, firstly, a plurality of battery cells 1 are arranged and assembled. At this time, the groove 101 can ensure that there is a gap between adjacent battery cells 1, which is convenient for subsequent air flow and ensures the heat dissipation effect of the entire module in the later use. After the assembly is completed, two adjacent tab bodies 2 are welded according to actual requirements, so as to realize the direct connection of the tab bodies 2 without the aid of tab brackets and busbars and other components, thereby greatly reducing the production cost;

[0021] The support sheets 4 are evenly spaced on the fixing plate 3, and the support sheets 4 are in contact with the tab body 2; the elastic sheets 5 are symmetrically distributed about the center line of the support sheets 4, and the elastic sheets 5 and the support sheets 4 are both made of EPP material; a fastening strip 501 is evenly fixed to one end of the elastic sheet 5 close to the tab body 2, and the fastening strip 501 is in contact with the tab body 2;

[0022] After the welding of the tab body 2 is completed, Figure 1-Figure 5 As shown, the support sheet 4 is assembled with the welded pole ear body 2 so that the pole ear body 2 is located between the support sheet 4 and the elastic sheet 5. With the elastic effect of the elastic sheet 5, the installation of the pole ear body 2 can be facilitated. After the installation is completed, the elastic sheet 5 provides a force for the fastening strip 501. With the effect of the support sheet 4, the clamping, fixing and supporting of the pole ear body 2 can be achieved, which effectively prevents the pole ears after welding from colliding and contacting each other, and can ensure the stability of the pole ear body 2 during subsequent glue pouring, and avoid the pole ear body 2 from folding and bending. After the fixation is completed, the device is matched with the glue pouring mold, and glue is poured. After the glue is cooled, the pouring glue 6 is formed. The pole ear body 2, the fixing plate 3, the support sheet 4 and the elastic sheet 5 can be formed into an integrated structure through the pouring glue 6, so that the modality of the whole package is improved, and the insulation withstand voltage characteristics of the pouring glue 6 meet the indicators of electrical characteristics and creepage distance, and by canceling the installation of the pole ear bracket and the bus bar, the cost can be greatly saved and the production efficiency can be improved, so as to better meet the actual production needs.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tab direct connection module, comprising a battery cell (1) and a potting compound (6), characterized in that: A tab body (2) is fixed on the battery cell (1); a fixing plate (3) is arranged on the lower side of the tab body (2); a lower end surface of the fixing plate (3) is flush with a lower end surface of the battery cell (1); a support sheet (4) is vertically fixed to an upper end surface of the fixing plate (3); an elastic sheet (5) is fixed on the support sheet (4); and the tab body (2), the fixing plate (3), the support sheet (4) and the elastic sheet (5) are wrapped by a potting glue (6) to form an integrated structure.

2. The tab direct connection module according to claim 1, characterized in that: A rectangular groove (101) is provided on the side of the battery cell (1).

3. The tab direct connection module according to claim 1, characterized in that: The tab bodies (2) are symmetrically distributed about the center line of the battery core (1), and adjacent tab bodies (2) are welded to each other.

4. The tab direct connection module according to claim 1, characterized in that: The support sheets (4) are distributed at equal intervals on the fixing plate (3), and the support sheets (4) are in contact with the tab body (2).

5. The tab direct connection module according to claim 1, characterized in that: The elastic sheet (5) is symmetrically distributed with respect to the center line of the support sheet (4), and both the elastic sheet (5) and the support sheet (4) are made of EPP material.

6. The tab direct connection module according to claim 1, characterized in that: A fastening strip (501) is evenly fixed to one end of the elastic sheet (5) close to the tab body (2), and the fastening strip (501) is in contact with the tab body (2).

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