CN220420639U

CN220420639U - Cell pressurizing device

Info

Publication number: CN220420639U
Application number: CN202321768240.7U
Authority: CN
Inventors: 孟丹丹; 王文轩; 刘丹
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2023-07-06
Filing date: 2023-07-06
Publication date: 2024-01-30
Anticipated expiration: 2033-07-06

Abstract

The utility model relates to the technical field of lithium ion batteries, and particularly discloses a cell pressurizing device, which comprises: the seat body comprises a first seat board, a second seat board and a connecting piece; the first seat board and the second seat board are arranged at intervals; the connecting piece is arranged between the first seat board and the second seat board, and two ends of the connecting piece are respectively connected with the first seat board and the second seat board; the pressing plate is provided with at least one pressing plate, and a cell clamping space is formed between the pressing plate and the first seat plate or between the two pressing plates; the pressurizing plate is detachably connected with the connecting piece, and the pressurizing plate can slide along the connecting piece to adjust the size of the clamping space of the electric core; the pressing mechanism is arranged on the second seat plate and used for applying pressure to the pressing plate. The cell pressurizing device can flexibly adjust the number of the pressurizing plates on the connecting piece so as to meet the requirement of pressurizing the cells with different specifications or different numbers, further reduce the risk of waste of the pressurizing plates or cell clamping spaces and facilitate safe use of the cells.

Description

Cell pressurizing device

Technical Field

The utility model relates to the technical field of lithium ion batteries, in particular to a cell pressurizing device.

Background

The lithium ion battery has high energy density and high average output voltage. Small self-discharge, excellent cycle performance, rapid charge and discharge, high charge efficiency up to 100%, high output power and long service life. Does not contain toxic and harmful substances, and is called a green battery. The method is suitable for large-scale electric energy storage, and has good application prospects in the fields of power generation safety grid connection of renewable energy power stations, power grid peak shaving, distributed power stations, UPS power supplies, emergency power supply systems and the like.

In order to ensure the safety performance of the lithium ion battery, after the battery is manufactured, the battery core of the battery is often required to be subjected to self-discharge detection and screening so as to ensure that the battery core has better electrical performance and reduce the risk of abnormal battery core. In the self-discharging process, the battery cell is usually required to be pressurized so that the interface lamination of the battery cell is tighter, thereby being capable of effectively amplifying the abnormal voltage drop of the battery cell, facilitating the appearance of the self-discharging abnormal problem of the battery cell, further facilitating the detection and analysis of the abnormal battery cell, facilitating the effective control of the self-discharging problem of the battery cell, and further ensuring the battery cell to have higher safety performance.

In the prior art, a pressurizing clamp is generally adopted to pressurize the battery cell; the number of the pressurizing plates of the existing pressurizing clamp is generally fixed, the pressurizing plates can only be slidably adjusted on the pressurizing clamp, and the pressurizing clamp is inconvenient to detach, so that pressurizing operation (the electric cores cannot be directly contacted and the pressurizing plates are required to be separated) can only be performed on the fixed number of electric cores, the using flexibility is low, waste of the pressurizing plates or pressurizing space is easily caused, and the number of the electric cores with different specifications is inconvenient to flexibly set.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a cell pressurizing device, which solves the problems that the number of pressurizing plates in the prior art cannot be flexibly set according to cells with different specifications, so that the pressurizing plates or pressurizing space is wasted easily.

In order to achieve the above object, the present utility model provides the following technical solutions:

a cell pressurizing device, comprising:

the seat body comprises a first seat board, a second seat board and a connecting piece; the first seat board and the second seat board are arranged at intervals; the connecting piece is arranged between the first seat board and the second seat board, and two ends of the connecting piece are respectively connected with the first seat board and the second seat board;

the pressing plate is provided with at least one pressing plate, and a cell clamping space is formed between the pressing plate and the first seat plate or between the pressing plates; the pressurizing plate is detachably connected with the connecting piece, and can slide along the connecting piece to adjust the size of the cell clamping space;

and the pressing mechanism is arranged on the second seat plate and used for applying pressure to the pressing plate.

Optionally, the first seat board and the second seat board are parallel to each other, and the first seat board and the second seat board are perpendicular to the connecting piece; the pressurizing plates are arranged at intervals along the first direction, and the cell clamping space is formed between two adjacent pressurizing plates.

Optionally, the connecting piece comprises a connecting rod and a supporting rod; the pressurizing plate is provided with a top and a bottom which are arranged along a second direction, and the top of the pressurizing plate is in sliding connection with the connecting rod; the bottom of the pressurizing plate is in sliding connection with the supporting rod.

Optionally, a first connecting portion is arranged on the connecting rod, and a second connecting portion matched with the first connecting portion is arranged on the pressurizing plate.

Optionally, the connecting rods extend along the first direction, two connecting rods are provided, and the two connecting rods are arranged in parallel; one side, close to each other, of the first connecting parts of the two connecting rods is provided with an L-shaped chute; and connecting convex blocks matched with the two L-shaped sliding grooves are respectively arranged on two sides of the second connecting part along the third direction.

Optionally, the two connecting rods are arranged at intervals along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

Optionally, the support bar is disposed at a distance between the two connecting bars in the third direction, and the support bar is parallel to the two connecting bars.

Optionally, two support rods are provided, and the two support rods are located at the same height in the second direction and are arranged in parallel with each other.

Optionally, the pressing mechanism includes a plurality of driving screws, and the driving screws are all screwed on the first seat board and/or the second seat board; the first end of the driving screw rod is abutted with a side wall, far away from the battery cell, of the pressurizing plate and is used for applying pressure to the battery cell.

Optionally, the pressing mechanism further comprises a synchronous driving piece; the synchronous driving piece is connected with the second ends of the driving screws and is used for synchronously driving the driving screws.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a cell pressurizing device, when in use, a cell is firstly placed in a cell clamping space, and then a pressurizing mechanism on a second seat plate is used for applying pressure to a pressurizing plate in a first state, so that the pressurizing plate can slide on a connecting piece in a direction close to the first seat plate until the cell in the cell clamping space reaches a preset pressure value; meanwhile, the number of the pressing plates on the connecting piece can be flexibly adjusted due to the fact that the pressing plates can be mutually changed between the first state and the second state, so that the pressing of different specifications or different numbers of electric cores can be met, the risk of waste of the pressing plates or the electric core clamping space can be reduced, and the follow-up safe use performance of the electric cores can be conveniently improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of a cell pressurizing device provided by the utility model;

fig. 2 is a top view of the cell pressurizing device provided by the utility model.

In the above figures: 1. a pressing mechanism; 2. a base; 21. a first seat plate; 22. a second seat plate; 23. a connecting piece; 231. a connecting rod; 2311. a first connection portion; 232. a support rod; 3. a pressurizing plate; 31. and a second connecting part.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the embodiments described below are only some embodiments of the present utility model, not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. Wherein the exemplary embodiments are described as processes or methods depicted as flowcharts; although a flowchart depicts various operations or step processes as a certain order, many of the operations or steps can be performed in parallel, concurrently or simultaneously, and the order of the various operations can be rearranged. When its operations or steps are completed, the corresponding process may be terminated, and there may be additional steps not included in the drawings. The processes described above may correspond to methods, functions, procedures, subroutines, and the like, and embodiments of the utility model and features of the embodiments may be combined with one another without conflict.

The term "comprising" and variants thereof as used herein is intended to be open ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings; it is to be understood that for convenience of description, only some, but not all of the structures relevant to the present utility model are shown in the drawings.

Referring to fig. 1 to 2, an embodiment of the present utility model provides a cell pressurizing device, including:

the seat body 2, the seat body 2 includes a first seat board 21, a second seat board 22 and a connecting piece 23; the first seat plate 21 and the second seat plate 22 are arranged at intervals; the connecting piece 23 is arranged between the first seat board 21 and the second seat board 22, and two ends of the connecting piece 23 are respectively connected with the first seat board 21 and the second seat board 22;

the pressing plates 3, at least one pressing plate 3 is arranged, and a cell clamping space is formed between the pressing plates 3 and the first seat plate 21 or between the two pressing plates 3; the pressurizing plate 3 is detachably connected with the connecting piece 23, and the pressurizing plate 3 can slide along the connecting piece 23 to adjust the size of the clamping space of the electric core;

and a pressing mechanism 1, wherein the pressing mechanism 1 is arranged on the second seat plate 22 and is used for applying pressure to the pressing plate 3.

According to the above scheme, when in use, the battery cell is firstly placed in the battery cell clamping space, and then the pressing mechanism 1 on the second seat plate 22 applies pressure to the pressing plate 3 in the first state, so that the pressing plate 3 can slide on the connecting piece 23 in the direction close to the first seat plate 21 until the battery cell in the battery cell clamping space reaches a preset pressure value; meanwhile, as the pressurizing plates 3 can be mutually changed between the first state and the second state, the quantity of the pressurizing plates 3 on the connecting piece 23 can be flexibly adjusted to meet the pressurizing use of different specifications or different quantities of electric cores, the risk of waste of the pressurizing plates 3 or electric core clamping spaces can be reduced, and the subsequent safe use performance of the electric cores can be conveniently improved.

Further, in order to prevent the battery cell from tilting during pressurization, so as to avoid the contact condition of the battery cell pole and the pressurization plate 3, and further ensure better pressurization quality, the first seat plate 21 and the second seat plate 22 are parallel to each other, and the first seat plate 21 and the second seat plate 22 are perpendicular to the connecting piece 23; the pressing plates 3 are plural, the plural pressing plates 3 are arranged at intervals along the first direction, and a cell clamping space is formed between two adjacent pressing plates 3.

Further, in order to better realize the connection between the pressurizing plate 3 and the connecting piece 23 to meet the use requirement, the connecting piece 23 includes a connecting rod 231 and a supporting rod 232; the pressurizing plate 3 has a top and a bottom arranged along the second direction, and the top of the pressurizing plate 3 is slidably connected with the connecting rod 231; the bottom of the pressurizing plate 3 is slidably connected with the supporting rod 232.

In this embodiment, by inserting the pressing plate 3 between the first seat plate 21 and the second seat plate 22 and making the top of the pressing plate 3 contact the connecting rod 231, the bottom of the pressing plate 3 abuts against the supporting rod 232, so that the pressing plate 3 is in the first state, and at this time, the supporting rod 232 can also serve as an auxiliary support for the bottom of the pressing plate 3; conversely, by extracting the pressing plate 3 from between the first seat plate 21 and the second seat plate 22, the pressing plate 3 can be brought into the second state. Meanwhile, the supporting rod 232 can also play a role in supporting the battery cells in the battery cell clamping space so as to ensure that the pressurizing operation is smoothly and effectively performed.

Specifically, in order to facilitate the realization of the fit connection between the pressurizing plate 3 and the connecting rod 231, thereby meeting the pressurizing requirement, the connecting rod 231 is provided with a first connecting portion 2311, and the pressurizing plate 3 is provided with a second connecting portion 31 adapted to the first connecting portion 2311.

In this embodiment, in order to facilitate the press plate 3 to be inserted into the first seat plate 21 and the second seat plate 22 and then be able to be quickly connected with the connecting rod 231 in a matching manner, or facilitate the quick separation of the press plate 3 and the connecting rod 231, so as to meet the use requirement, the connecting rod 231 extends along the first direction, two connecting rods 231 are provided, and the two connecting rods 231 are parallel to each other; one side of the first connection portion 2311 of the two connection rods 231, which is close to each other, is provided with an L-shaped chute; the two sides of the second connecting portion 31 along the third direction are respectively provided with connecting protruding blocks matched with the two L-shaped sliding grooves.

In addition, the cooperation setting of L type spout and connection lug also can make pressurization board 3 and connecting rod 231 have bigger area of contact to can reduce the risk that pressurization board 3 produced the slope in the slip in-process, in order to do benefit to the promotion to the pressurization quality of electric core.

Specifically, in order to enable the two connecting rods 231 to be located at the same height position in the second direction, so that the two connecting protrusions on the pressurizing plate 3 can be conveniently machined, the two connecting rods 231 are arranged at intervals along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

In this embodiment, the first direction is defined as the X direction, the second direction is defined as the Y direction, and the third direction is defined as the Z direction (as shown in fig. 1).

Further, in order to effectively support the bottom of the battery cell placed in the battery cell clamping space, so as to realize pressurizing operation on the battery cell, the support rod 232 is arranged at the interval of the two connecting rods 231 in the third direction, and the support rod 232 and the two connecting rods 231 are parallel to each other.

Specifically, in order to be convenient for realize better supporting effect to the electric core to avoid electric core relative third direction slope, thereby do benefit to and promote the pressurizing performance, bracing piece 232 is equipped with two, and two bracing pieces 232 are in same height, and mutual parallel arrangement in the second direction.

In this embodiment, the distance between the two support rods 232 in the third direction is smaller than the distance between the two connecting rods 231 in the third direction, and the two support rods 232 are disposed near the middle positions of the bottoms of the first seat board 21 and the second seat board 22, so as to support the battery cell more effectively.

Further, in order to facilitate the driving adjustment of the pressing plate 3 to meet the pressing requirement, the pressing mechanism 1 includes a plurality of driving screws, and the driving screws are all screwed on the first seat plate 21 and/or the second seat plate 22; the first end of the driving screw is abutted with one side wall of the pressurizing plate 3, which is far away from the battery cell, and is used for applying pressure to the battery cell.

In the embodiment, the first end of the driving screw is abutted against the pressurizing plate 3 by rotating the adjusting driving screw, and then the driving screw is continuously rotated in the same direction, so that the pressure can be applied to the pressurizing plate 3, and the battery cell is pressurized; otherwise, the electric core can be released by reversely rotating the driving screw. The driving screw can be rotated and adjusted through the torque wrench, so that the pressure of the pressurizing plate 3 can be controlled through controlling the pressure of the torque wrench, and a pressure sensor is not needed to be additionally arranged on the pressurizing plate 3.

Further, in order to facilitate synchronous driving of the driving screws, so that the pressurizing plate 3 can translate and uniformly pressurize the battery cells, thereby being beneficial to improving pressurizing quality, the pressurizing mechanism 1 further comprises a synchronous driving piece (not shown in the figure); the synchronous driving piece is connected with the second ends of the driving screws and is used for synchronously driving the driving screws.

In this embodiment, the synchronous driving member is a gear assembly; specifically, the driving shaft of the gear assembly is in threaded connection with the first seat board 21 and/or the second seat board 22, the pitch of the driving shaft is the same as that of the driving screw, the driven gears of the gear assembly are the same and are fixed at the second ends of the driving screw in a one-to-one correspondence manner, and the driven gears are meshed with the driving gears on the driving shaft, so that synchronous driving of a plurality of driving screws can be realized through rotation of the driving shaft. In addition, the synchronous driving piece can also be a cam component, so that synchronous driving adjustment can be carried out on a plurality of driving screws to meet the use requirement.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A cell pressurizing device, comprising:

the seat body (2), the seat body (2) comprises a first seat board (21), a second seat board (22) and a connecting piece (23); the first seat board (21) and the second seat board (22) are arranged at intervals; the connecting piece (23) is arranged between the first seat board (21) and the second seat board (22), and two ends of the connecting piece (23) are respectively connected with the first seat board (21) and the second seat board (22);

the pressing plate (3), at least one pressing plate (3) is arranged, and a cell clamping space is formed between the pressing plate (3) and the first seat plate (21) or between the pressing plates (3); the pressurizing plate (3) is detachably connected with the connecting piece (23), and the pressurizing plate (3) can slide along the connecting piece (23) to adjust the size of the cell clamping space;

and the pressing mechanism (1) is arranged on the second seat plate (22) and is used for applying pressure to the pressing plate (3).

2. The cell pressurizing device according to claim 1, wherein the first seat plate (21) and the second seat plate (22) are parallel to each other, and the first seat plate (21) and the second seat plate (22) are perpendicular to the connecting member (23); the pressurizing plates (3) are arranged at intervals along the first direction, and the cell clamping space is formed between two adjacent pressurizing plates (3).

3. The cell pressurizing device according to claim 2, wherein the connecting member (23) comprises a connecting rod (231) and a supporting rod (232); the pressurizing plate (3) is provided with a top and a bottom which are arranged along a second direction, and the top of the pressurizing plate (3) is in sliding connection with the connecting rod (231); the bottom of the pressurizing plate (3) is connected with the supporting rod (232) in a sliding way.

4. A cell pressurizing device according to claim 3, wherein the connecting rod (231) is provided with a first connecting portion (2311), and the pressurizing plate (3) is provided with a second connecting portion (31) adapted to the first connecting portion (2311).

5. The cell pressurizing device according to claim 4, wherein the connecting rods (231) extend in the first direction, the connecting rods (231) are provided in two, and the two connecting rods (231) are arranged in parallel to each other; one side, close to each other, of the first connecting parts (2311) of the two connecting rods (231) is provided with an L-shaped chute; and connecting convex blocks matched with the two L-shaped sliding grooves are respectively arranged on two sides of the second connecting part (31) along the third direction.

6. The cell pressurizing device according to claim 5, wherein two of the connecting rods (231) are arranged at intervals along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

7. The cell pressurizing device according to claim 6, wherein the support bar (232) is provided at a distance between the two connection bars (231) in the third direction, and the support bar (232) and the two connection bars (231) are parallel to each other.

8. The cell pressurizing device according to claim 7, wherein two of the support rods (232) are provided, and the two support rods (232) are positioned at the same height in the second direction and are arranged in parallel to each other.

9. The cell pressurizing device according to claim 1, wherein the pressurizing mechanism (1) comprises a plurality of drive screws, which are each screwed onto the first seat plate (21) and/or the second seat plate (22); the first end of the driving screw rod is abutted with a side wall, far away from the battery cell, of the pressurizing plate (3) and used for applying pressure to the battery cell.

10. The cell pressurizing device according to claim 9, wherein the pressurizing mechanism (1) further comprises a synchronous drive; the synchronous driving piece is connected with the second ends of the driving screws and is used for synchronously driving the driving screws.