CN217903276U

CN217903276U - Quick block structure of square battery

Info

Publication number: CN217903276U
Application number: CN202221935855.XU
Authority: CN
Inventors: 程胜兵; 周宸; 代辉; 吴伟军; 康乔
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-11-25
Anticipated expiration: 2032-07-26

Abstract

The utility model discloses a square battery is structure in groups fast, first square electric core and the square electric core of second of range of laminating each other including the side, all be provided with the buffer layer on the side of laminating each other of first square electric core and the square electric core of second, the buffer layer is including the dielectric layer that stacks in proper order, adhesive layer and drawing layer, the dielectric layer is including setting up the N utmost point district at both ends, S utmost point district and the compartment of setting between N utmost point district and S utmost point district, N utmost point district and S utmost point district adopt flexible magnetic medium material to make, the compartment adopts flexible material to make, but N utmost point district and S utmost point district magnetism actuation, first square electric core and the square electric core of second are when in groups, laminate each other through the magnetic force side of adsorbing. Set up the buffer layer that has magnetism, gentle elasticity on the side of square electric core during manufacturing, directly utilize the magnetism actuation to laminate two electric core sides when in groups, need not the manual work and paste the bubble cotton or through the rubber coating of machine equipment, improve production efficiency, reduction in production cost.

Description

Quick block structure of square battery

Technical Field

The utility model relates to a lithium cell technical field, concretely relates to quick block structure of square battery.

Background

The existing square battery is grouped by adding foam between the battery core and the battery core or coating structural adhesive between the battery core and the battery core, and then forming a grouping tool to extrude the battery core to reach the set pressure, then punching upper end plates at two ends of the stacked battery core (the punching end plates are fixed for facilitating the module group, and simultaneously the battery core is uniformly clamped), and then forming a complete module group through the bundling belt. This scheme needs the manual work to paste the bubble cotton or through the rubber coating of machine equipment, and will increase special frock and fix a position, and the process increases, efficiency reduces, the cost increase.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a square battery is structure in groups fast sets up the buffer layer that has magnetism, gentle elasticity on the side of square electric core during manufacturing, directly utilizes the magnetism actuation to laminate two electric core sides during in groups, need not the manual work and pastes the bubble cotton or through the mechanical equipment rubber coating, improves production efficiency, reduction in production cost.

In order to solve the technical problem, the utility model discloses a square battery is structure in groups fast, including the first square electric core and the second square electric core of the mutual range of laminating in side, first square electric core with all be provided with the buffer layer on the side of the mutual range of laminating of the square electric core of second, the buffer layer is the rectangle slice, the buffer layer is including dielectric layer, adhesive layer and the drawing layer that stacks in proper order, the dielectric layer is in including setting up at the N utmost point district at both ends, S utmost point district and setting N utmost point district with the compartment between the S utmost point district, N utmost point district with S utmost point district adopts flexible magnetic medium material to make, the compartment adopts flexible material to make, N utmost point district with but S utmost point district magnetism actuation, first square electric core with the square electric core of second is when in groups, laminates each other through magnetic force adsorption side.

In the quick grouping structure of the square batteries, when the square battery cores are manufactured, the buffer layers with magnetism and flexibility are arranged on the side surfaces, so that the side surfaces of the two battery cores are directly attached by magnetic attraction when grouping is performed, manual foam pasting or gluing through mechanical equipment is not needed, the grouping efficiency of modules is greatly improved, and the labor cost, the equipment and the tooling cost are saved; in addition, the buffer layer has gentle elasticity, can effectively offset electric core self-expanding deformation that electric core cycle number increases and bring behind the module is constituteed to square electric core, also can cushion impact and vibration between the square electric core, has ensured the safety of electric core.

As the utility model discloses square battery is quick burst structure's improvement, works as first square electric core with when establishing ties between the square electric core of second: the positive electrodes of the first square battery cell and the second square battery cell correspond to the respective N-pole regions, and the negative electrodes of the first square battery cell and the second square battery cell correspond to the respective S-pole regions; or the cathodes of the first square battery cell and the second square battery cell correspond to the respective N pole regions, and the anodes of the first square battery cell and the second square battery cell correspond to the respective S pole regions.

Further, when the first square battery cell and the second square battery cell are connected in parallel: the positive electrode of the first square battery cell and the negative electrode of the second square battery cell correspond to the respective N-pole regions; or the positive electrode of the first square battery cell and the negative electrode of the second square battery cell correspond to the respective S-pole regions.

On each square battery, through the N utmost point district with the buffer layer with S utmost point district respectively with an electrode utmost point of this square battery corresponding to when in groups, utilize magnetism homopolar then mutual strong repulsion' S function, effectively prevent slow-witted, the mistake dress when preventing electric core series-parallel connection has ensured the quality when electric core is in groups. After the square batteries are grouped, the positive and negative electrodes of the adjacent square battery cores are directly connected by using the bus bars to realize series-parallel connection, in order to reduce the size of the bus bars for connecting the two square battery cores, the extreme ends of the two square battery cores to be connected are usually arranged close to each other, and therefore the N pole area or the S pole area corresponding to the positive and negative electrodes of each square battery core needs to be correspondingly adjusted according to the series-parallel connection.

As the utility model discloses another kind of improvement of the quick block structure of square battery, the N utmost point district with the S utmost point district adopts the rubber magnetism to make. Preferably, the spacer is made of EVA plastic.

The rubber magnet is a novel rubber composite material, and has the magnetic property of a rigid magnet and the flexibility of rubber. EVA (Ethylene vinyl acetate Copolymer) is copolymerized from Ethylene and acetic acid, and since vinyl acetate monomer is introduced into the molecular chain of EVA, high crystallinity is reduced, and toughness, impact resistance, filler compatibility and heat sealability are improved. Consequently whole buffer layer 3 has insulating wear-resisting thermal conductivity, can prevent effectively that the dislocation of module in-process of beating from causing the damage of electric core outer surface film to bring insulating problem, and wear-resisting heat conduction has effectively ensured the safety of electric core simultaneously.

In conclusion, the quick grouping structure of the square batteries can greatly improve the grouping efficiency of the square battery cells, and save labor cost, equipment and tooling cost; offset electric core self-expanding deformation that electric core cycle number increases and bring, the impact and the vibration between the square electric core of buffering have ensured the safety of electric core.

Drawings

In the drawings:

fig. 1 is the whole structure diagram of the first square battery cell and the second square battery cell group of the present invention.

Fig. 2 is a schematic diagram of the first square battery cell and the second square battery cell connected in series according to the present invention.

Fig. 3 is a schematic diagram of the first square battery cell and the second square battery cell connected in parallel according to the present invention.

Fig. 4 is a structure view of the buffer layer detaching end of the present invention.

In the figure, 1, a first square battery cell; 2. a second square cell; 3. a buffer layer; 31. a dielectric layer; 311. an N-pole region; 312. an S pole region; 313. a spacer region; 32. an adhesive layer; 33. and (6) a picture layer.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.

Fig. 1-4 show the utility model discloses a quick unitized construction of square battery. As shown in fig. 1-4, the fast grouping structure of the square battery includes a first square battery cell 1 and a second square battery cell 2, which are arranged with their side surfaces attached to each other, the first square battery cell 1 and the second square battery cell 2 are both provided with a buffer layer 3, the buffer layer 3 is in a rectangular sheet shape, the buffer layer 3 includes a dielectric layer 31, an adhesive layer 32 and a picture layer 33 stacked in sequence, the dielectric layer 31 includes an N-pole region 311 and an S-pole region 312 disposed at two ends and a spacer region 313 disposed between the N-pole region 311 and the S-pole region 312, the N-pole region 311 and the S-pole region 312 are made of a flexible magnetic dielectric material, the spacer region 313 is made of a flexible material, the N-pole region 311 and the S-pole region 312 can be magnetically attracted, and the first square battery cell 1 and the second square battery cell 2 are attached to each other with their side surfaces by magnetic force when being grouped.

Optionally, the buffer layers 3 are disposed on two side surfaces of the first square battery cell 1 or the second square battery cell 2. The battery modules can be formed by continuously grouping the batteries. The N-pole region 311 and the S-pole region 312 on the buffer layer 3 on two sides of the same square battery cell are oppositely arranged, that is, the N-pole region 311 and the S-pole region 312 on two sides respectively correspond to the same positive electrode or negative electrode of the square battery.

Optionally, when the first square battery cell 1 and the second square battery cell 2 are connected in series: the positive electrodes of the first square battery cell 1 and the second square battery cell 2 correspond to respective N-pole regions 311, and the negative electrodes correspond to respective S-pole regions 312; or, the cathodes of the first square battery cell 1 and the second square battery cell 2 correspond to the respective N-pole regions 311, and the anodes of the first square battery cell 1 and the second square battery cell 2 correspond to the respective S-pole regions 312.

Optionally, when the first square battery cell 1 and the second square battery cell 2 are connected in parallel: the positive electrode of the first square battery cell 1 and the negative electrode of the second square battery cell 2 correspond to respective N pole regions 311; or, the positive electrode of the first square battery cell 1 and the negative electrode of the second square battery cell 2 correspond to the S-pole regions 312.

On each square battery, through with buffer layer 3N utmost point district 311 and S utmost point district 312 respectively with an electrode utmost point of this square battery corresponding to when in groups, utilize the homopolar function that then mutual strong repulsion of magnetism, effectively prevent slow-witted, prevent mistake dress when electric core series-parallel connection, ensured the quality when electric core is in groups. After the square batteries are grouped, the positive and negative electrodes of the adjacent square battery cores are directly connected by using the bus bars to realize series-parallel connection, in order to reduce the size of the bus bars for connecting the two square battery cores, the extreme ends of the two square battery cores to be connected are usually arranged close to each other, and therefore the N pole region 311 or the S pole region 312 corresponding to the positive and negative electrodes of each square battery core needs to be correspondingly adjusted according to the series-parallel connection.

During the use, if first square electric core 1 and the square electric core 2 of second establish ties, as shown in fig. 2, the positive pole of first square electric core 1 and the square electric core 2 of second all corresponds N utmost point district 311, laminates negative pole one end and the positive pole one end of first square electric core 1 of the square electric core 2 of second each other, because the mutual actuation of magnetic pole like this, puts first square electric core 1 and the square electric core 2 of second into a group together, connects the positive negative pole of one end after putting into a group and realizes establishing ties promptly. If the first square battery cell 1 and the second square battery cell 2 are connected in parallel, as shown in fig. 3, the positive electrode of the first square battery cell 1 and the negative electrode of the second square battery cell 2 correspond to the respective N-pole region 311, and one end of the negative electrode of the second square battery cell 2 is attached to one end of the negative electrode of the first square battery cell 1, so that the first square battery cell 1 and the second square battery cell 2 are grouped together due to mutual attraction of magnetic poles, and then two homopolars at one end of the grouped battery cells are connected to realize parallel connection.

Optionally, the N-pole region 311 and the S-pole region 312 are made of rubber magnet. The spacer 313 is made of EVA plastic.

The rubber magnet is a novel rubber composite material, and has the magnetic property of a rigid magnet and the flexibility of rubber. EVAETHYLene Vinylacetate Copolymer is prepared by copolymerizing ethylene and acetic acid, and EVA introduces Vinyl Acetate monomer into molecular chain, so that high crystallinity is reduced, and toughness, impact resistance, filler compatibility and heat sealing performance are improved. Consequently whole buffer layer 3 has insulating wear-resisting thermal conductivity, can prevent effectively that the dislocation of module in-process of beating from causing the damage of electric core outer surface film to bring insulating problem, and wear-resisting heat conduction has effectively ensured the safety of electric core simultaneously

Optionally, the buffer layer 3 is fixed on the side of the first square battery cell 1 or the second square battery cell 2 by gluing. The adhesive is fixedly connected, the operation is simple and convenient, and the cost is low.

Optionally, the screen layer 33 is provided with N, S letter patterns corresponding to the N-pole region 311 and the S-pole region 312, respectively. The device is convenient for visual identification, and the possibility of grouping errors is reduced.

Optionally, the length and width of the surface of the buffer layer 3 are not less than the length and width of the side surface of the first square battery cell 1 or the second square battery cell 2.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope thereof, and although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that: after reading the present disclosure, one of ordinary skill in the art may make various changes, modifications and equivalents to the embodiments of the present disclosure, which are within the scope of the appended claims.

Claims

1. The utility model provides a square battery is structure in groups fast, its characterized in that, including first square electric core (1) and the square electric core of second (2) that the side was laminated each other and is arranged, first square electric core (1) with all be provided with buffer layer (3) on the side that the square electric core of second (2) was laminated each other, buffer layer (3) are the rectangle slice, buffer layer (3) are including dielectric layer (31), adhesive layer (32) and drawing layer (33) that stack in proper order, dielectric layer (31) are including setting up at N utmost point district (311), S utmost point district (312) at both ends and setting up N utmost point district (311) with interval (313) between S utmost point district (312), N utmost point district (311) with S utmost point district (312) adopt flexible magnetic medium material to make, interval (313) adopt flexible material to make, N utmost point district (311) with but S utmost point district (312) magnetic attraction, first square electric core (1) with second electric core (2) are when being in groups, through adsorbing each other sides.

2. The prismatic battery rapid grouping structure according to claim 1, wherein when the first prismatic cell (1) and the second prismatic cell (2) are connected in series:

the anodes of the first square battery cell (1) and the second square battery cell (2) correspond to the respective N-pole region (311), and the cathodes of the first square battery cell and the second square battery cell correspond to the respective S-pole region (312);

or the like, or, alternatively,

the cathodes of the first square battery cell (1) and the second square battery cell (2) correspond to the respective N-pole regions (311), and the anodes thereof correspond to the respective S-pole regions (312).

3. The prismatic battery rapid grouping structure according to claim 1, wherein when the first prismatic battery cell (1) and the second prismatic battery cell (2) are connected in parallel:

the positive electrode of the first square battery cell (1) and the negative electrode of the second square battery cell (2) correspond to the respective N-pole regions (311);

or the like, or, alternatively,

the positive electrode of the first square battery cell (1) and the negative electrode of the second square battery cell (2) correspond to the S-pole region (312).

4. The prismatic battery rapid grouping structure according to claim 1, wherein the surface length and width dimension of the buffer layer (3) is not less than the side length and width dimension of the first prismatic battery cell (1) or the second prismatic battery cell (2).

5. The prismatic battery rapid grouping structure of claim 1, wherein the N pole region (311) and the S pole region (312) are made of rubber magnet.

6. The prismatic battery rapid grouping structure of claim 1, wherein the buffer layer (3) is fixed on the side of the first prismatic battery cell (1) or the second prismatic battery cell (2) by gluing.

7. The rapid grouping structure of prismatic cells as claimed in claim 1, wherein the screen layer (33) is provided with N, S letter patterns corresponding to the N-pole region (311) and the S-pole region (312), respectively.

8. The prismatic battery rapid grouping structure of claim 1, wherein the buffer layer (3) is disposed on both sides of the first prismatic battery cell (1) or the second prismatic battery cell (2).

9. The prismatic cell rapid-uniting structure according to claim 1, wherein the spacers (313) are made of EVA plastic.