Assembling structure of lithium battery module

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a splicing structure of a lithium battery module, which comprises a plurality of lithium battery blocks, the upper end and the lower end of each lithium battery block are respectively provided with an anode contact and a cathode contact, the upper end and the lower end of each lithium battery block are respectively connected with a splicing module, each splicing module comprises a plurality of splicing sleeve heads and a U-shaped contact plate, each splicing sleeve head is quadrilateral, the four edges of each splicing sleeve head are connected with the other four adjacent splicing sleeve heads respectively, the multiple splicing sleeve heads sleeve the two ends of the multiple lithium battery blocks respectively, and the inner wall of the U-shaped contact plate is in sliding connection with the outer wall of the end, away from the lithium battery blocks, of each splicing sleeve head; and one side, positioned at the end part of the splicing sleeve head, of the U-shaped contact plate is propped against one end of the lithium battery block. According to the splicing structure of the lithium battery module, the U-shaped contact plates are inserted into the splicing sleeve heads, so that rapid parallel connection of a plurality of lithium battery blocks is realized, the welding process during parallel connection of the plurality of lithium battery blocks is reduced, and the splicing efficiency of the lithium battery module is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to an assembly structure of a lithium battery module. Background Technique

[0002] For the grouping of lithium-ion battery modules, the columnar installation and connection of battery cells mostly adopt laser welding of busbar (bus bar) components to the electrode terminals of each battery cell, so as to connect each battery cell in series and parallel to form a lithium battery module. Then, multiple lithium battery modules are spliced with each other in series or parallel to finally form lithium batteries with different voltages and different current magnitudes. When the existing lithium battery modules are spliced, welding is usually used to weld the positive and negative electrodes of multiple lithium battery monomers through copper bars, zinc bars, etc., either by spot welding or soldering. The assembly process is relatively complex, and the arrangement of multiple lithium battery monomers is relatively messy. After the welding is not completed, a packaging shell is used to wrap the assembled lithium battery module to cover the messy lithium battery monomers.

[0003] For example, the utility model patent with the publication number CN218448187U discloses a spliced lithium battery module, which includes several stacked mold layers, and the mold layers are connected through screws passing through. Any mold layer includes several main battery cell brackets, and mortise and tenon structures are arranged on the sides of the main battery cell brackets, and the main battery cell brackets are correspondingly connected through the mortise and tenon structures. Each main battery cell bracket is provided with a battery cell slot for installing cylindrical battery cells. The positive and negative poles of the cylindrical battery cells are respectively installed in the battery cell slots of the upper and lower layers of main battery cell brackets during installation. Mortise and tenon structures are added to the side of the bracket for splicing and fixing, realizing the rapid assembly of the lithium battery brackets in the same mold layer. Then, the mold layers are stacked and connected through screws passing through. After synthesis, a spliced battery cell module with strong versatility is obtained, and the bracket structure can be quickly changed according to the required number of battery cells to form batteries of various capacity models, so as to achieve the effects of shortening the manufacturing cycle and reducing the production cost.

[0004] However, the lithium battery module in the above technology still has the following problems:

[0005] Although the lithium battery monomers can be arranged and connected more regularly through the mold, the multiple lithium battery monomers still need to be connected by welding, which leads to that the welding between the upper and lower layers of lithium battery monomers still needs to be welded through wires separately, and the welding method is relatively complex. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides an assembly structure of a lithium battery module, for example: multiple lithium battery monomers can be connected without welding, improving the splicing efficiency of the lithium battery module.

[0007] To achieve the above object, the present utility model provides the following technical solution: An assembly structure of a lithium battery module, including a plurality of lithium battery blocks. Positive contact terminals and negative contact plates are respectively provided at the upper and lower ends of the lithium battery blocks. The upper and lower ends of the plurality of lithium battery blocks are both connected with splicing modules. The splicing module includes a plurality of splicing sleeves and U-shaped contact plates. The splicing sleeve is quadrilateral, and the four sides of the splicing sleeve are respectively connected with the other four adjacent splicing sleeves. The plurality of splicing sleeves are respectively sleeved at both ends of the plurality of lithium battery blocks. The inner wall of the U-shaped contact plate is slidably connected with the outer wall of the end of the splicing sleeve far from the lithium battery block. One side of the U-shaped contact plate located at the end of the splicing sleeve abuts against one end of the lithium battery block. A spacer block is fixedly connected to the end of the splicing sleeve far from the lithium battery block, and the thickness of the spacer block is greater than the thickness of the top end of the U-shaped contact plate.

[0008] Further, a limiting baffle is fixedly connected to the inner wall of the splicing sleeve near the positive contact terminal. A contact hole is penetrated through the middle position of the limiting baffle. The end of the positive contact terminal far from the lithium battery block penetrates through the contact hole and abuts against the adjacent U-shaped contact plate. One side of the limiting baffle near the lithium battery block abuts against the lithium battery block.

[0009] Further, mounting grooves are provided on the four sides of the splicing sleeve. The mounting grooves are located at the middle position of the side of the splicing sleeve and are vertically arranged. The two ends of the U-shaped contact plate are respectively slidably connected with two symmetrical mounting grooves. Hook connection structures are connected to both ends of the U-shaped contact plate. Both hook connection structures are connected to the end of the splicing sleeve far from the spacer block, and the wall thickness at both ends of the U-shaped contact plate is not less than the groove depth of the mounting grooves on both sides.

[0010] Further, the hook connection structure includes two connection hooks fixed at both ends of the U-shaped contact plate. Four hook grooves are provided at the end of the splicing sleeve far from the spacer block. The four hook grooves are respectively located at the ends of the four mounting grooves far from the spacer block. The two connection hooks are respectively slidably connected with two symmetrical hook grooves.

[0011] Further, the end of the U-shaped contact plate far from the splicing sleeve is designed as an arc-shaped plate, and the arc-shaped plate bends inward. The middle position of the arc-shaped plate abuts against the end of the lithium battery block.

[0012] Further, the number of spacer blocks is four, and the four spacer blocks are respectively located at the four corner positions of the splicing sleeve. The four spacer blocks are respectively located on both sides of the four mounting grooves.

[0013] Further, splicing grooves are vertically provided on both adjacent sides of the splicing sleeve, and splicing strips are vertically and fixedly connected to the other two adjacent sides. The splicing strips are matched with the splicing grooves, and both the upper and lower ends of the splicing grooves are through settings.

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

[0015] The assembly structure of this lithium battery module inserts a U-shaped contact plate into the splicing sleeve, thereby connecting multiple lithium battery blocks in the same column in parallel with each other, achieving rapid parallel connection between multiple lithium battery blocks, reducing the welding process during the parallel connection of multiple lithium battery blocks, and further improving the splicing efficiency of the lithium battery module. Description of the Drawings

[0016] Figure 1 Schematic diagram of the overall appearance connection structure of the present utility model;

[0017] Figure 2 Schematic diagram of the connection structure of a single lithium battery block of the present utility model;

[0018] Figure 3 Based on Figure 2 Partial connection structure cross-sectional view;

[0019] Figure 4 Based on Figure 3 Another perspective connection structure diagram;

[0020] Figure 5 Schematic diagram of the connection structure of the splicing sleeve at the bottom of the lithium battery block of the present utility model;

[0021] Figure 6 Schematic diagram of the connection structure of the splicing sleeve at the top of the lithium battery block of the present utility model;

[0022] Figure 7 Schematic diagram of the overall appearance structure of the U-shaped contact plate of the present utility model.

[0023] In the figure: 1, lithium battery block; 2, positive electrode contact; 3, negative electrode contact piece; 4, splicing sleeve; 5, U-shaped contact plate; 6, spacer block; 7, limit baffle; 8, connection hook; 9, splicing strip; 401, installation groove; 402, hook groove; 403, splicing groove; 701, contact hole. Detailed Implementation Modes

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0025] Please refer to Figure 1 - Figure 7, An assembling structure of a lithium battery module, including multiple lithium battery blocks 1. Positive contact terminals 2 and negative contact plates 3 are respectively arranged at the upper and lower ends of the lithium battery block 1. The upper and lower ends of the multiple lithium battery blocks 1 are both connected with splicing modules. The splicing module includes multiple splicing sleeves 4 and U-shaped contact plates 5. The splicing sleeve 4 is quadrilateral, and the four sides of the splicing sleeve 4 are respectively connected with the other four adjacent splicing sleeves 4. The multiple splicing sleeves 4 are respectively sleeved at both ends of the multiple lithium battery blocks 1. The inner wall of the U-shaped contact plate 5 is slidably connected with the outer wall of the end of the splicing sleeve 4 away from the lithium battery block 1. The U-shaped contact plate 5 is located on one side of the end of the splicing sleeve 4 and abuts against one end of the lithium battery block 1. A partition block 6 is fixedly connected to the end of the splicing sleeve 4 away from the lithium battery block 1, and the thickness of the partition block 6 is greater than the thickness of the top end of the U-shaped contact plate 5.

[0026] As Figure 1 - Figure 7 shown, the assembling structure of a lithium battery module in the present utility model is similar to the existing assembling structure of a lithium battery module. For example, a spliced lithium battery module disclosed in the patent with the publication number CN218448187U. The main improvement point of the present utility model is that it can realize the parallel connection of multiple lithium battery blocks 1, improve the splicing efficiency of the lithium battery module. As Figures 1 to 7 shown, when the assembling structure of the lithium battery module in the present utility model is in use, first splice multiple splicing sleeves 4 into a splicing module, then insert multiple lithium battery blocks 1 into the splicing sleeves 4 of the splicing module respectively, and also put a splicing module on the top of the lithium battery block 1. Then insert the U-shaped contact plate 5 into the splicing sleeve 4, and make it abut against one end of the lithium battery block 1 through the splicing sleeve 4. Among them, the U-shaped contact plate 5 needs to be made of a material convenient for power conduction, such as copper plate, so that the lithium battery block 1 is electrically connected to the U-shaped contact plate 5, and the two sides of the multiple U-shaped contact plates 5 are in contact with each other, so that the multiple lithium battery blocks 1 in the same column are completed in parallel, thus realizing the rapid parallel connection of the lithium battery blocks 1, reducing the welding operation process, and improving the splicing efficiency of the lithium battery module.

[0027] As Figure 3 and Figure 6 shown, a limiting baffle 7 is fixedly connected to the inner wall of the splicing sleeve 4 near one end of the positive contact terminal 2. A contact terminal hole 701 is penetrated through the middle position of the limiting baffle 7. The end of the positive contact terminal 2 away from the lithium battery block 1 penetrates through the contact terminal hole 701 and abuts against the adjacent U-shaped contact plate 5. The side of the limiting baffle 7 close to the lithium battery block 1 abuts against the lithium battery block 1. When the splicing sleeve 4 is sleeved on one end of the positive contact terminal 2 of the lithium battery block 1, it is sleeved on the positive contact terminal 2 through the contact terminal hole 701 of the limiting baffle 7, so as to reduce the shaking of the splicing sleeve 4 at one end of the positive contact terminal 2 of the lithium battery block 1, and further improve the connection stability of one end of the positive contact terminal 2 of the lithium battery block 1.

[0028] AsFigure 1 - Figure 7 As shown, mounting grooves 401 are provided on all four sides of the splicing socket 4. The mounting grooves 401 are located in the middle of the side of the splicing socket 4 and are vertically arranged. Both ends of the U-shaped contact plate 5 are slidably connected to two symmetric mounting grooves 401 respectively. Both ends of the U-shaped contact plate 5 are connected with hook structures, and both hook structures are connected to the end of the splicing socket 4 away from the spacer 6. Moreover, the wall thickness at both ends of the U-shaped contact plate 5 is not less than the groove depth of the two side mounting grooves 401. By providing the mounting grooves 401 on the four sides of the splicing socket 4, when the U-shaped contact plate 5 is inserted on the splicing socket 4, it will not protrude too much. Thus, after multiple splicing sockets 4 are spliced with each other, it is ensured that two adjacent U-shaped contact plates 5 abut against each other, thereby connecting the current, and at the same time making the gap at the joint between the splicing sockets 4 smaller.

[0029] As Figure 5 and Figure 7 shown, the hook structure includes two connection hooks 8 fixed at both ends of the U-shaped contact plate 5. Four hook grooves 402 are provided at the end of the splicing socket 4 away from the spacer 6. The four hook grooves 402 are respectively located at the ends of the four mounting grooves 401 away from the spacer 6. The two connection hooks 8 are respectively slidably connected to two symmetric hook grooves 402. When the U-shaped contact plate 5 is inserted on the splicing socket 4, by hooking the two connection hooks 8 at both ends into the corresponding two hook grooves 402, the U-shaped contact plate 5 can be more firmly installed on the splicing socket 4, preventing the U-shaped contact plate 5 from falling off during use.

[0030] As Figure 1 - Figure 7 shown, the end of the U-shaped contact plate 5 away from the splicing socket 4 is designed as an arc-shaped plate, and the arc-shaped plate bends inward. The middle position of the arc-shaped plate abuts against the end of the lithium battery block 1. By designing the top end of the U-shaped contact plate 5 as an arc-shaped plate that bends inward, when the U-shaped contact plate 5 is inserted on the splicing socket 4 and fixed by the connection hooks 8, the top of the U-shaped contact plate 5 can be pressed against the end of the lithium battery block 1, thereby improving the stability of the electrical connection between the U-shaped contact plate 5 and the end of the lithium battery block 1, preventing loosening and resulting in poor electrical connection contact, and improving the stability of the parallel connection between the lithium battery blocks 1.

[0031] As Figure 1 - Figure 7 shown, the number of the spacers 6 is four, and the four spacers 6 are respectively located at the four corner positions of the splicing socket 4, and the four spacers 6 are respectively located on both sides of the four mounting grooves 401. Through the function of the spacers 6, the upper and lower layers of lithium battery modules can be separated from each other, thereby preventing contact between the upper and lower U-shaped contact plates 5 and causing a short circuit in the circuit.

[0032] As Figure 1 - Figure 6As shown, splicing grooves 403 are vertically formed on both adjacent sides of the splicing socket 4, and splicing strips 9 are vertically and fixedly connected to the other two adjacent sides. The splicing strips 9 are arranged to match the splicing grooves 403, and both the upper and lower ends of the splicing grooves 403 are through settings. One of the splicing sockets 4 is inserted into the splicing groove 403 of the other splicing socket 4 through the splicing strip 9, so as to realize the connection and fixation between two adjacent splicing sockets 4. The cross-sections of the splicing groove 403 and the splicing strip 9 are trapezoidal, or can be T-shaped, as long as the splicing and fixation can be realized and they will not fall off easily.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention.

Claims

1. An assembly structure of a lithium battery module, comprising a plurality of lithium battery blocks (1), with a positive electrode contact (2) and a negative electrode contact piece (3) respectively provided at the upper and lower ends of the lithium battery block (1), characterized in that: Both the upper and lower ends of the multiple lithium battery blocks (1) are connected with splicing modules. The splicing module includes multiple splicing sleeves (4) and U-shaped contact plates (5). The splicing sleeve (4) is quadrilateral. The four sides of the splicing sleeve (4) are respectively connected with the other four adjacent splicing sleeves (4). The multiple splicing sleeves (4) respectively sleeve the two ends of the multiple lithium battery blocks (1). The inner wall of the U-shaped contact plate (5) is slidably connected with the outer wall of the end of the splicing sleeve (4) far away from the lithium battery block (1). The U-shaped contact plate (5) is located on one side of the end of the splicing sleeve (4) and abuts against one end of the lithium battery block (1). A partition block (6) is fixedly connected to the end of the splicing sleeve (4) far away from the lithium battery block (1). The thickness of the partition block (6) is greater than the thickness of the top end of the U-shaped contact plate (5).

2. The assembling structure of a lithium battery module according to claim 1, characterized in that: A limiting baffle (7) is fixedly connected to the inner wall of the splicing sleeve (4) at the end close to the positive electrode contact (2). A contact hole (701) is penetrated through the middle position of the limiting baffle (7). The end of the positive electrode contact (2) far away from the lithium battery block (1) penetrates through the contact hole (701) and abuts against the adjacent U-shaped contact plate (5). The side of the limiting baffle (7) close to the lithium battery block (1) abuts against the lithium battery block (1).

3. The assembling structure of a lithium battery module according to claim 1 or 2, characterized in that: Installation grooves (401) are formed in the four sides of the splicing sleeve (4). The installation grooves (401) are located at the middle position of the side of the splicing sleeve (4) and are arranged vertically. The two ends of the U-shaped contact plate (5) are respectively slidably connected with two symmetrical installation grooves (401). Both ends of the U-shaped contact plate (5) are connected with a hook connection structure. Both hook connection structures are connected with the end of the splicing sleeve (4) far away from the partition block (6). And the wall thickness at both ends of the U-shaped contact plate (5) is not less than the groove depth of the installation grooves (401) on both sides.

4. The assembling structure of a lithium battery module according to claim 3, characterized in that: The hook connection structure includes two connection hooks (8) fixed at both ends of the U-shaped contact plate (5). Four hook grooves (402) are formed at the end of the splicing sleeve (4) far away from the partition block (6). The four hook grooves (402) are respectively located at the end of the four installation grooves (401) far away from the partition block (6). The two connection hooks (8) are respectively slidably connected with two symmetrical hook grooves (402).

5. The assembling structure of a lithium battery module according to claim 1, 2 or 4, characterized in that: The end of the U-shaped contact plate (5) far away from the splicing sleeve (4) is designed as an arc-shaped plate, and the arc-shaped plate bends inwards. The middle position of the arc-shaped plate abuts against the end of the lithium battery block (1).

6. The assembling structure of a lithium battery module according to claim 3, characterized in that: The number of the partition blocks (6) is four, and the four partition blocks (6) are respectively located at the four corner positions of the splicing sleeve (4). The four partition blocks (6) are respectively located on both sides of the four installation grooves (401).

7. The assembly structure of a lithium battery module according to claim 1, 2, 3 or 6, characterized in that: Splicing grooves (403) are vertically formed in the two adjacent sides of the splicing sleeve (4). Splicing strips (9) are vertically and fixedly connected to the other two adjacent sides. The splicing strips (9) are matched with the splicing grooves (403), and both the upper and lower ends of the splicing grooves (403) are through settings.

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