CN216928873U

CN216928873U - Soft packet of lithium cell module of increase contact surface

Info

Publication number: CN216928873U
Application number: CN202220455705.2U
Authority: CN
Inventors: 王珂; 郑威; 梁孜; 王睿
Original assignee: Shanghai Woyoo Electronic Technology Co ltd
Current assignee: Shanghai Woyoo Electronic Technology Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-07-08
Anticipated expiration: 2032-02-28

Abstract

The utility model belongs to the technical field of soft package lithium batteries, and particularly relates to a soft package lithium battery module with an enlarged contact surface. The soft packet of lithium cell in this increase contact surface's soft packet of lithium battery module has the contact site of the shape of falling U, and its converge apron has the upper cover plate and fixes busbar on the lower terminal surface of upper cover plate, the busbar includes connecting strip, fixed connection and is in total utmost point post on the connecting strip up end and fixing a plurality of spliced poles on the terminal surface under the connecting strip, each the spliced pole is the level setting and the lower terminal surface is convex semi-circular cylinder structure. Based on the utility model, the inverted U-shaped contact part of the tab is matched with the connecting column of the semicircular column structure with the lower end surface in the shape of the circular arc, and the inverted U-shaped contact part and the connecting column are connected, so that the contact area is effectively increased, the contact resistance is reduced, and the working performance of the lithium battery module can be improved.

Description

Soft packet of lithium cell module of increase contact surface

Technical Field

The utility model belongs to the technical field of soft package lithium batteries, and particularly relates to a soft package lithium battery module with an enlarged contact surface.

Background

In the soft package type lithium battery technology, the contact area of the positive electrode lug and the negative electrode lug of the lithium battery core and the connection structure of the total positive electrode post and the total negative electrode post are determined. If area of contact is less, can increase contact resistance to the temperature is higher when leading to output to rise, is unfavorable for the heat dissipation of lithium cell module. Therefore, it is necessary to solve the above problems to improve the working performance of the soft package lithium battery module.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a soft-package lithium battery module with an enlarged contact surface.

The technical scheme provided by the utility model is as follows:

a soft package lithium battery module capable of increasing a contact surface comprises a battery box with an upper end opening, wherein the bottom surface of the battery box is provided with a plurality of pairs of battery bottom plug sockets, each pair of battery bottom plug sockets are plugged with a soft package lithium battery core, each soft package lithium battery core is provided with two tabs, the tabs are same in structure and respectively provided with an inverted U-shaped contact part, the opening of the battery box is detachably connected with a left bus cover plate and a right bus cover plate, each bus cover plate is respectively provided with an upper cover plate and a bus bar fixed on the lower end surface of the upper cover plate, each bus bar comprises a connecting bar, a main pole fixedly connected on the upper end surface of the connecting bar and a plurality of connecting columns fixed on the lower end surface of the connecting bar, each connecting column is of a semicircular structure with the lower end surface being in a circular arc shape, and is arranged perpendicular to the connecting bar, each the lower terminal surface crimping of spliced pole is in a correspondence on the convex internal surface of contact site, total utmost point post upwards runs through upper cover plate, each soft packet of lithium cell looks is with the utmost point ear of one side as the positive pole, and the utmost point ear of the same opposite side is the negative pole.

Based on above-mentioned technical scheme, the contact site of the shape of falling U of utmost point ear and the spliced pole phase-match of the semicircular cylinder structure that the lower terminal surface is convex, and both connect, the effectual area of contact that has improved to contact resistance has been reduced, and can improve lithium battery module's working property. The connecting column is semicircular, so that the overall weight of the busbar can be reduced under the condition that the contact area is not reduced.

Preferably, the inner diameter of the lower circular arc-shaped portion of the contact portion is equal to or slightly smaller than the diameter of the connecting column. After the upper cover plate is fixed, the height of the lower end face of the connecting column is slightly lower than the height of the lowest position of the inner surface of the contact part. The matched lug has certain elasticity, so that the lower end surface of the connecting column can be tightly pressed on the corresponding arc-shaped inner surface of the contact part.

Furthermore, each upper cover plate is provided with a row of battery top plug sockets corresponding to the battery bottom plug sockets respectively.

Based on above-mentioned technical scheme, can cooperate the battery bottom bayonet socket, together improve soft packet of lithium cell's fixed effect.

Specifically, the plug sockets at the bottoms of the batteries are respectively and correspondingly arranged at two sides of the bottom surface of the battery box; each upper cover plate is provided with a row of battery top plug sockets on the side edge.

Specifically, four corners of each upper cover plate are respectively provided with a threaded through hole, and two corresponding side walls of the battery box are respectively provided with a corresponding threaded through hole.

Based on above-mentioned technical scheme, can be convenient fix two upper cover plates, and seal through two upper cover plates.

Specifically, each connecting column is fixedly connected with the connecting strip at the same end, and is pressed and connected to the corresponding circular arc-shaped inner surface of the contact part at the other end.

Drawings

Fig. 1 is a schematic top view of the inside of a soft pack lithium battery module with an enlarged contact surface according to the present invention, which is located below an upper cover plate.

Fig. 2 is a schematic top view of a soft-package lithium battery cell in the soft-package lithium battery module with an increased contact surface provided by the utility model.

Fig. 3 is a side view of a soft-packed lithium battery cell in a soft-packed lithium battery module with an increased contact surface provided by the present invention.

Fig. 4 is a side view of a bus cover plate in a soft-packed lithium battery module with an increased contact surface provided by the present invention.

Fig. 5 is a top view of a soft-packed lithium battery module with an increased contact surface provided by the present invention.

In fig. 1, 2, 3, 4, and 5, the structures represented by the reference numerals are listed below:

1. a battery box; 11. a battery bottom socket; 2. soft packaging of the lithium battery cell; 21. a contact portion; 3. a confluence cover plate; 31. an upper cover plate; 32. a bus bar; 321. a connecting strip; 322. a general pole; 323. connecting columns; 33. a battery top socket; 4. a threaded through bore.

Detailed Description

The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the utility model.

It will be understood that when an element or component is referred to as being "connected," "positioned" or "coupled" to another element or component, it can be directly on the other element or component or intervening elements or components may also be present. The terms "left", "right", "upper", "lower" and the like as used herein are for illustrative purposes only.

In one embodiment, as shown in fig. 1, the soft-package lithium battery module with an enlarged contact surface includes a battery box 1 with an opening at an upper end, a plurality of pairs of battery bottom sockets 11 are disposed on a bottom surface of the battery box 1, and each pair of battery bottom sockets 11 is plugged with one soft-package lithium battery cell 2.

As shown in fig. 2 and 3, each of the lithium-ion battery cells 2 has two tabs, each of which has the same structure and has an inverted U-shaped contact portion 21. As shown in fig. 5, two left and right confluence cover plates 3 are detachably connected to an opening of the battery case 1.

As shown in fig. 1 and 4, each of the bus cover plates 3 has an upper cover plate 31 and a bus bar 32 fixed on a lower end surface of the upper cover plate 31, the bus bar 32 includes a connecting bar 321, a general pole 322 fixedly connected to an upper end surface of the connecting bar 321, and a plurality of connecting columns 323 fixed on a lower end surface of the connecting bar 321, each connecting column 323 is a horizontally arranged semicircular column structure with a circular arc-shaped lower end surface, each connecting column 323 is arranged perpendicular to the connecting bar 321, and the lower end surface of each connecting column 323 is pressed on an inner circular arc-shaped surface of a corresponding contact portion 21.

As shown in fig. 1 and 5, the general pole 322 extends upward through the upper cover plate 31. Each connecting post 323 is fixedly connected to the connecting bar 321 at the same end and is press-fitted to the circular arc-shaped inner surface of the corresponding contact portion 21 at the other end.

The same side of each soft-package lithium battery cell 2 is provided with a positive electrode, and the same other side of each soft-package lithium battery cell is provided with a negative electrode.

Based on this technical scheme, the contact site of the shape of falling U of utmost point ear and the spliced pole phase-match of the semicircular cylinder structure that the lower terminal surface is convex, and both connect, the effectual area of contact that has improved to contact resistance has been reduced, and can improve lithium battery module's working property.

In one embodiment, as shown in fig. 4, each upper cover plate 31 is provided with a row of battery top sockets 33 corresponding to each battery bottom socket 11, respectively. The battery bottom plug sockets 11 are respectively and correspondingly arranged on two sides of the bottom surface of the battery box 1; each upper cover plate 31 is provided with a row of battery top sockets 33 on its side. Based on this technical scheme, can cooperate the battery bottom bayonet socket, together improve soft packet of lithium cell's fixed effect.

As shown in fig. 1 and 5, four corners of each upper cover plate 31 are respectively provided with a threaded through hole 4, and two corresponding side walls of the battery box 1 are respectively provided with a corresponding threaded through hole 4. Based on this technical scheme, can be convenient fix two upper cover plates, and seal through two upper cover plates.

The foregoing is merely a preferred embodiment of this invention and is not intended to limit the utility model in any manner; those skilled in the art can readily practice the utility model as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the utility model as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an increase contact surface's soft packet of lithium battery module, includes upper end open-ended battery box (1), the bottom surface of battery box (1) is provided with a plurality ofly to battery bottom bayonet socket (11), and each battery bottom bayonet socket (11) a soft packet of lithium cell (2) of pegging graft, each soft packet of lithium cell (2) have two utmost point ears, its characterized in that: the structure of each pole lug is the same, the pole lugs are respectively provided with an inverted U-shaped contact part (21), the opening of the battery box (1) is detachably connected with a left bus cover plate and a right bus cover plate (3), each bus cover plate (3) is respectively provided with an upper cover plate (31) and a bus bar (32) fixed on the lower end surface of the upper cover plate (31), each bus bar (32) comprises a connecting bar (321), a general pole column (322) fixedly connected on the upper end surface of the connecting bar (321) and a plurality of connecting columns (323) fixed on the lower end surface of the connecting bar (321), each connecting column (323) is a semicircular column structure which is horizontally arranged and the lower end surface of which is in a circular arc shape, each connecting column (323) is vertical to the connecting bar (321), the lower end surface of each connecting column (323) is in pressure connection with the circular arc-shaped inner surface of one corresponding contact part (21), total utmost point post (322) upwards run through upper cover plate (31), each the utmost point ear of the same one side of soft packet of lithium cell (2) is anodal, and the utmost point ear of the same opposite side is the negative pole.

2. The soft-package lithium battery module with the increased contact surface as claimed in claim 1, wherein: each upper cover plate (31) is provided with a row of battery top plug sockets (33) which respectively correspond to the battery bottom plug sockets (11).

3. The soft-package lithium battery module with the increased contact surface as claimed in claim 2, wherein: the battery bottom plug sockets (11) are respectively and correspondingly arranged on two sides of the bottom surface of the battery box (1); each upper cover plate (31) is provided with a row of battery top plug sockets (33) on the side edge.

4. The soft-package lithium battery module with the increased contact surface as claimed in claim 1, wherein: four corners of the upper cover plate (31) are respectively provided with a threaded through hole (4), and two corresponding side walls of the battery box (1) are respectively provided with a corresponding threaded through hole (4).

5. The soft-package lithium battery module with the increased contact surface as claimed in any one of claims 1 to 4, wherein: each connecting column (323) is fixedly connected with the connecting strip (321) at the same end and is pressed and connected to the corresponding circular arc-shaped inner surface of the contact part (21) at the other end.