CN210296462U

CN210296462U - Lithium ion battery module

Info

Publication number: CN210296462U
Application number: CN201921537183.5U
Authority: CN
Inventors: 易刘波; 严建国; 谢曙光; 曹长河; 孙珊珊
Original assignee: Ningbo Vico New Energy Co Ltd
Current assignee: NINGBO VEKEN NEW ENERGY TECHNOLOGY Co.,Ltd.
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-04-10
Anticipated expiration: 2029-09-16

Abstract

The utility model provides a lithium ion battery module belongs to lithium ion battery technical field, include: an accommodating box; the battery assembly is arranged in the accommodating box and comprises a plurality of battery cells, and tabs are arranged on the battery cells; a circuit board; the insulating fixed plate, it sets up on the containing box, battery pack and the circuit board is located respectively insulating fixed plate's top and below, be provided with the guide slot on the insulating fixed plate, the upper and lower both ends of guide slot are located respectively insulating fixed plate's up end and terminal surface down, utmost point ear passes the guide slot with the circuit board welding. The utility model has the advantages that: the structure of the battery module is very ingenious, the assembly efficiency can be greatly optimized, the assembly time is saved, and the cost is reduced.

Description

Lithium ion battery module

Technical Field

The utility model belongs to the technical field of lithium ion battery, a lithium ion battery module is related to.

Background

The lithium ion battery is a secondary battery (rechargeable battery) which mainly depends on lithium ions moving between a positive electrode and a negative electrode to work, and the technology of the lithium ion battery is greatly developed along with the increasingly prominent environmental protection problem and the increasingly serious energy crisis. The lithium ion battery has the advantages of high voltage, high specific energy, wide working temperature range and the like, and can gradually replace rechargeable batteries such as lead-acid batteries, nickel-hydrogen batteries and the like. Particularly, in the aspect of power batteries for vehicles, the proportion of lithium ion batteries is gradually increased.

For example, a chinese patent with application number 201610766664.8 discloses a module grouping structure based on a lithium ion soft package battery, which comprises an upper cover plate (5), an upper shell (6) and a lower shell (7), and is characterized in that: still include electric core (1), utmost point post (2), utmost point ear fixed plate (3), baffle (4), electric core (1) sets up go up casing (6) and lower casing (7) cladding cavity in, electric core (1) is provided with utmost point ear (8), be provided with a plurality of utmost point ear fixed orificess (9) on utmost point ear (8), the upper cover plate with be provided with baffle (4) between the electric core, utmost point post suit be in on baffle (4) and with upper cover plate (5) are connected.

The lithium ion battery pack has the problems of difficult installation, complex maintenance and the like, and the lithium ion battery pack is mainly required to be reasonable in structure and to be installed and maintained because a plurality of battery cells are inconvenient to fix and are very troublesome in assembly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a lithium ion battery module.

The purpose of the utility model can be realized by the following technical proposal: a lithium ion battery module, comprising:

an accommodating box;

the battery assembly is arranged in the accommodating box and comprises a plurality of battery cells, and tabs are arranged on the battery cells;

a circuit board;

the insulating fixed plate, it sets up on the containing box, battery pack and the circuit board is located respectively insulating fixed plate's top and below, be provided with the guide slot on the insulating fixed plate, the upper and lower both ends of guide slot are located respectively insulating fixed plate's up end and terminal surface down, utmost point ear passes the guide slot with the circuit board welding.

Preferably, the containing box comprises a box body and a side cover, the box body is provided with a side opening, and the side cover is connected with the box body and seals the side opening.

Preferably, the box body and the side cover are both provided with a clamping groove, a buckle is arranged on the side edge of the insulating fixed plate, and the buckle is embedded in the clamping groove so that the containing box is fixedly connected with the insulating fixed plate.

Preferably, the container further comprises a housing, the insulating fixing plate is fixedly connected with the housing, and the containing box is arranged in the housing through the insulating fixing plate.

Preferably, a fixing seat is arranged on a side edge of the insulating fixing plate, a screw hole is formed in the fixing seat, the housing includes a housing and a housing cover, a screw is arranged on the housing cover, the fixing seat is arranged on the housing, the housing cover covers the housing, and the screw penetrates through the screw hole and the housing.

Preferably, a joint is arranged on the shell cover, and the joint is electrically connected with the battery cell.

Preferably, the insulation fixing plate is provided with a positioning column, the circuit board is provided with a positioning hole, and the positioning column penetrates through the positioning hole.

Preferably, a plurality of contact portions are formed on two sides of the circuit board, a gap is formed between every two adjacent contact portions, and the gap is located above the guide groove.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the structure of the battery module is very ingenious, the assembly efficiency can be greatly optimized, the assembly time is saved, and the cost is reduced.

2. The box all has the draw-in groove with the side cap on, and two draw-in grooves set up relatively, have the buckle on the both sides edge around the insulating fixed plate, and when the buckle inlayed and establishes on the draw-in groove, just can make and hold the case and link together with insulating fixed plate, and when in fact dismantling, only need press the buckle, can make the buckle break away from in the draw-in groove, then just can make insulating fixed plate with hold the case separation.

3. The circuit board can be connected with the positioning column through the positioning hole, so that the circuit board can be fixed on the insulating fixing plate, and the positioning effect can be achieved, so that contacts on the circuit board can be aligned with the lugs of the battery cell, and automatic welding is facilitated.

Drawings

Fig. 1 is the connection relationship diagram of the circuit board, the insulating fixing plate and the battery cell of the present invention.

Fig. 2 is an explosion diagram of the circuit board, the insulating fixing plate and the battery cell of the present invention.

Fig. 3 is an explosion diagram of the lithium ion battery module according to the present invention.

Fig. 4 is a schematic view of the connection relationship between the battery cell and the insulating fixing plate of the present invention.

In the figure, 100, a housing box; 110. a box body; 120. a side cover; 130. a card slot; 200. an electric core; 300. a tab; 400. a circuit board; 410. positioning holes; 420. a contact portion; 500. an insulating fixing plate; 510. a guide groove; 520. buckling; 530. a fixed seat; 540. a screw hole; 550. a positioning column; 600. a housing; 700. a shell cover; 710. a screw; 720. and (4) a joint.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, and 4, a lithium ion battery module includes: the accommodating case 100, the battery pack, the circuit board 400, and the insulation fixing plate 500 greatly simplify the structure through the insulation fixing plate 500, and improve the assembly efficiency.

It should be noted here that, in the conventional battery module, the battery cell 200 and the circuit board 400 are provided, the tab 300 needs to be soldered with the collecting line, and then the collecting line and the circuit board 400 are welded together, which is very troublesome, and the labor cost is high, and many peripheral materials of PACK are needed.

The container 100 is a container for accommodating the battery pack; the battery assembly is arranged in the accommodating box 100 and comprises a plurality of battery cells 200, and tabs 300 are arranged on the battery cells 200; because the quantity of electricity core 200 is more, need set up in holding case 100 and just can realize the assembly to holding case 100 also can play the effect of protection battery pack.

Preferably, the battery cell 200 is actually a soft package battery cell 200, the battery cell 200 has tabs 300, the tabs 300 are metal conductors leading positive and negative electrodes out of the battery cell 200, and the tabs of the positive and negative electrodes of the battery are contact points during charging and discharging; the tab 300 can be brought into contact with an appropriate contact on the circuit board 400 by the guidance of the insulation fixing plate 500, and thus can be positioned on the circuit board 400 directly through the insulation fixing plate 500 and assembled by automatic laser welding without being welded to the circuit board 400 through a pickup line.

Insulating fixed plate 500, it sets up on the containing box 100, battery pack and circuit board 400 are located respectively insulating fixed plate 500's top and below, be provided with guide slot 510 on the insulating fixed plate 500, the upper and lower both ends of guide slot 510 are located respectively insulating fixed plate 500's up end and terminal surface down, utmost point ear 300 passes guide slot 510 with circuit board 400 welds.

Insulating fixed plate 500 sets up the upper shed department at containing box 100 in fact, and insulating fixed plate 500 is located between circuit board 400 and electric core 200, can directly guide utmost point ear 300 to suitable position on circuit board 400 through guide slot 510, just can be very light convenient link together electric core 200 with circuit board 400 through laser automatic weld equipment this moment, thereby make the more simple of assembling process, the efficiency of assembly has been improved greatly, simultaneously the effectual assembly cost that has reduced, make originally need manual welding's battery module to assemble through automatic welded mode, and can effectively simplify the structure of battery module, the actual assembly work of being convenient for.

As shown in fig. 1, 2, and 3, in the above embodiment, the storage box 100 includes a box body 110 and a side cover 120, the box body 110 is provided with a side opening, and the side cover 120 is connected to the box body 110 to close the side opening.

Preferably, the accommodating case 100 is not an integral structure, but a detachable split structure, which facilitates the maintenance of the battery pack, and particularly, the case body 110 actually has a side opening, and the side cover 120 is disposed on the side opening to be connected to the case body 110, which enables the case body 110 to be opened without detaching the insulating fixing plate 500, which facilitates the maintenance of the battery pack, and if the case body 110 of an integral type is used, the case body 110 needs to be separated from the insulating fixing plate 500, and the detachment process is troublesome.

As shown in fig. 1, 2 and 3, in the above embodiment, the case body 110 and the side cover 120 are both provided with a locking groove 130, a side of the insulating fixing plate 500 is provided with a locking buckle 520, and the locking buckle 520 is inserted into the locking groove 130, so that the accommodating case 100 is fixedly connected to the insulating fixing plate 500.

Preferably, the case body 110 and the side cover 120 are provided with the engaging grooves 130, the engaging grooves 130 are disposed oppositely, the front and rear sides of the insulating fixing plate 500 are provided with the engaging hooks 520, when the engaging hooks 520 are embedded in the engaging grooves 130, the accommodating case 100 and the insulating fixing plate 500 can be connected together, and in practice, when the insulating fixing plate 500 is detached, the engaging hooks 520 can be disengaged from the engaging grooves 130 only by pressing the engaging hooks 520, and then the insulating fixing plate 500 and the accommodating case 100 can be separated.

Preferably, the detachable case 110 is connected to the insulation fixing plate 500 through the engaging slot 130 and the engaging button 520, so that the mounting and dismounting processes can be greatly optimized, specifically, the side cover 120 is dismounted, and the accommodating case 100 can be separated from the insulation fixing plate 500 even if the engaging button 520 is not pressed, and further, a fixing bolt is disposed between the case 110 and the insulation fixing plate 500, so as to further fix the case 110 and the insulation fixing plate 500 together.

As shown in fig. 1, 2, 3 and 4, in addition to the above embodiment, the storage case further includes a housing, the insulating fixing plate 500 is fixedly connected to the housing, and the storage case 100 is disposed in the housing through the insulating fixing plate 500.

Preferably, the housing is actually a shell of the lithium ion battery module, the insulating fixing plate 500 is fixedly connected with the housing, and the accommodating box 100 is connected with the housing through the insulating fixing plate 500, so that the assembly process can be greatly simplified.

The containing box 100 is actually located in the casing 600, the containing box 100 needs to be kept in a fixed state with the casing 600, the containing box 100 can be kept fixed without being directly connected with the casing 600 through the insulating fixing plate 500, the whole lithium battery module is actually connected to the insulating fixing plate 500, and the whole lithium battery module can be kept fixed with the casing 600 only by connecting the insulating fixing plate 500 with the casing.

As shown in fig. 1, 2, 3, and 4, on the basis of the above embodiment, a fixing seat 530 is disposed on a side edge of the insulating fixing plate 500, a screw hole 540 is disposed on the fixing seat 530, the housing includes a housing 600 and a housing cover 700, a screw 710 is disposed on the housing cover 700, the fixing seat 530 is disposed on the housing 600, the housing cover 700 covers the housing 600, and the screw 710 passes through the screw hole 540 and the housing 600.

The left and right sides of insulating fixed plate 500 is gone up to extend outward and is formed with fixing base 530, and wear to be equipped with screw 710 on the cap 700, screw 540 and screw 710 can be with cap 700, these three fixed connection of casing 600 and insulating fixed plate 500, further save assembly time, the assembly efficiency is improved, can also make insulating fixed plate 500 keep fixed in battery module, avoid rocking because of battery module and lead to insulating fixed plate 500 to shift or rock, make insulating fixed plate 500 stability more.

Preferably, a handle is further provided on the housing cover 700, and a user can lift the entire battery module by the handle.

As shown in fig. 1, 2, 3, and 4, in addition to the above embodiments, the cover 700 is provided with a connector 720, the connector 720 is electrically connected to the battery cell 200, and preferably, the connector 720 can connect the battery cell 200 to a power consumption end or a power transmission end, so that the battery cell 200 can be discharged or charged.

As shown in fig. 1, in addition to the above embodiments, the insulation fixing plate 500 is provided with positioning posts 550, the circuit board 400 is provided with positioning holes 410, and the positioning posts 550 pass through the positioning holes 410.

Preferably, the upper end surface of the insulating fixing plate 500 is provided with a positioning column 550 with a positioning function, and the circuit board 400 can be connected with the positioning column 550 through the positioning hole 410, so that the circuit board 400 can be fixed on the insulating fixing plate 500, and a positioning effect can also be achieved, so that contacts on the circuit board 400 can be aligned with the tabs 300 of the battery cells 200, and automatic welding is facilitated.

As shown in fig. 1, 2, and 3, in the above embodiment, a plurality of contact portions 420 are formed on both sides of the circuit board 400, and a gap is formed between two adjacent contact portions 420 and is located above the guide groove 510.

Preferably, the contact portions 420 have gaps therebetween, so that the tabs 300 can pass through the gaps and then be bent and attached to the contact portions 420, thereby connecting the battery cell 200 to the circuit board 400, and facilitating welding, and it should be noted that not every contact portion 420 is connected to a tab, but generally every two adjacent tabs are separated by one contact portion 420.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A lithium ion battery module, comprising:

an accommodating box;

a circuit board;

2. A lithium ion battery module as claimed in claim 1, characterized in that: the containing box comprises a box body and a side cover, wherein the box body is provided with a side opening, and the side cover is connected with the box body and seals the side opening.

3. A lithium ion battery module as claimed in claim 2, characterized in that: the box with all be provided with the draw-in groove on the side cover, be provided with the buckle on the side of insulating fixed plate, thereby the buckle inlays to be established thereby make in the draw-in groove hold the case with insulating fixed plate fixed connection.

4. A lithium ion battery module as claimed in claim 1, characterized in that: still include the shell, insulating fixed plate with shell fixed connection, the containing box passes through insulating fixed plate sets up in the shell.

5. A lithium ion battery module as claimed in claim 4, characterized in that: the side edge of the insulating fixing plate is provided with a fixing seat, a screw hole is formed in the fixing seat, the shell comprises a shell body and a shell cover, a screw is arranged on the shell cover, the fixing seat is arranged on the shell body, the shell cover covers the shell body, and the screw penetrates through the screw hole and the shell body.

6. A lithium ion battery module as claimed in claim 5, characterized in that: and the shell cover is provided with a joint, and the joint is electrically connected with the battery cell.

7. A lithium ion battery module as claimed in claim 1, characterized in that: the insulation fixing plate is provided with a positioning column, the circuit board is provided with a positioning hole, and the positioning column penetrates through the positioning hole.

8. A lithium ion battery module as claimed in claim 1, characterized in that: a plurality of contact parts are formed on two sides of the circuit board, a gap is formed between every two adjacent contact parts, and the gap is located above the guide groove.