CN216958159U

CN216958159U - Pressure formation conductive pressing block structure

Info

Publication number: CN216958159U
Application number: CN202220588751.XU
Authority: CN
Inventors: 余建军; 翟所德
Original assignee: Guangdong Dongtang Intelligent Technology Co ltd
Current assignee: Guangdong Dongtang Intelligent Technology Co ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-07-12
Anticipated expiration: 2032-03-16

Abstract

The utility model belongs to the technical field of polymer soft package lithium ion battery tabs, and particularly relates to a pressure formation conductive pressing block structure which is arranged on a laminated board and used for pressing a battery tab; the laminated board comprises a floating pressing block and a conductive block, wherein the floating pressing block is arranged on the laminated board, the conductive block is arranged on the surface of the floating pressing block, and an inclined guide part extends from the inner side of the conductive block. In the process of forming the battery by loading the battery between the two pressing plates, the battery is translated towards one side, and when the tab is lapped on the conductive block, the tab is guided to the plane of the conductive block through the guide part, so that the tab is prevented from being abutted against the side surface of the floating pressing block, and the tab of the battery can be ensured to be normally connected with electricity to form the battery.

Description

Pressure formation conductive pressing block structure

Technical Field

The utility model belongs to the technical field of formation and correction of polymer soft package lithium ion batteries, and particularly relates to a pressure formation conductive pressing block structure.

Background

The polar aprotic solvent, which is a lithium ion battery during the first charge and discharge of the lithium ion battery, inevitably reacts on the electrode and the electrolyte surface to form a passivation film, called an electronic insulating film or a solid electrolyte film, i.e., an SEI film, covering the surface of the electrode. The formation of the SEI film has a crucial effect on the performance of the electrode material. On one hand, the formation of the SEI film consumes part of lithium ions, so that the irreversible capacity of the first charge and discharge is increased, and the charge and discharge efficiency of the electrode material is reduced; on the other hand, the SEI film has organic solvent insolubility and can stably exist in an organic electrolyte solution, and solvent molecules cannot pass through the passivation film, so that male insertion of the solvent molecules can be effectively prevented, damage to an electrode material due to co-insertion of the solvent molecules is avoided, and the cycle performance and the service life of the electrode are greatly improved. The quality of the formed SEI film determines the quality of the SEI film, and directly influences the electrochemical properties of the battery, such as cycle life, stability, self-discharge property, safety and the like. The formation of the battery requires long-time charging and discharging, and not only the voltage or current of the charging and discharging needs to be accurately controlled, but also the pulse waveform of the charging and discharging voltage and current needs to be accurately controlled during charging, so as to prevent the SEI film impedance from increasing, thereby influencing the multiplying power discharging performance of the lithium ion battery and improving the production efficiency of the formation process. The higher the control accuracy of voltage and current, the better the quality of lithium battery products.

In the formation, the battery is gripped and placed between the laminated plates by a robot, and a tower-shaped guide is usually provided at the top end of the laminated plate in order to guide the battery between the laminated plates; further, the battery can be introduced between the laminated plates to complete the press forming. After the battery is placed between the two pressing plates, the battery needs to be moved properly, so that the pole ear of the battery can be lapped on the conductive pressing plate. However, the side face of the pressing block is a straight face, and the tabs of the battery are difficult to avoid and have the problem of deformation, so when the tabs of the battery are moved to the pressing block, the tabs of the battery are abutted against the side face of the pressing block, the guide tabs cannot be pressed on the pressing block, and the formation of the battery cannot be completed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pressure formation conductive pressing block structure, which solves the problem that a tab can not be pressed to connect electricity when a polymer flexible package lithium battery is formed.

In order to achieve the above object, the embodiment of the present invention provides a pressure formation conductive compact structure, which is disposed on a laminate and used for compressing a battery tab; the laminated board comprises a floating pressing block and a conductive block, wherein the floating pressing block is arranged on the laminated board, the conductive block is arranged on the surface of the floating pressing block, and an inclined guide part extends from the inner side of the conductive block.

Furthermore, an inclined plane is further arranged on the floating pressing block, and the inner side face of the guide part is attached to the inclined plane.

Furthermore, a step extends from one end of the inclined plane of the floating pressing block, and the end part of the guide part is lapped on the step.

Furthermore, the included angle between the guide part and the surface of the conductive block is 30-45 degrees.

Further, the floating pressing block comprises a compression spring, a pressing block and a limiting plate; the laminated board is provided with a concave cavity, the compression spring is arranged in the concave cavity, the limiting plate is arranged at the opening of the concave cavity, and the pressing block penetrates through the limiting plate and extends into the concave cavity to be abutted against the compression spring; the two sides of the pressing block are provided with limiting parts which are limited on the inner sides of the limiting plates, and the conductive blocks are arranged on the pressing block.

Further, a wire groove is further formed in the outer side of the concave cavity, and one end of the wire groove extends to the bottom side of the laminated board.

Further, the lower end of the wire groove is also provided with a wire clamp for clamping a wire.

One or more technical schemes in the pressure formation conductive pressing block structure provided by the embodiment of the utility model at least have the following technical effects:

in the process of forming the battery by loading the battery between the two pressing plates, the battery is translated towards one side, and when the tab is lapped on the conductive block, the tab is guided to the plane of the conductive block through the guide part, so that the tab is prevented from being abutted against the side surface of the floating pressing block, and the tab of the battery can be ensured to be normally connected with electricity to form the battery.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a structural diagram of a pressure-formed conductive compact structure according to an embodiment of the present invention.

Fig. 2 is an exploded view of the floating compact that is pressed into a conductive compact structure according to an embodiment of the present invention.

Fig. 3 is a partially enlarged view of fig. 2.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the embodiments of the present invention, and should not be construed as limiting the utility model.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In one embodiment of the present invention, referring to fig. 1-3, a press formed conductive compact structure is provided on a laminate 100 for compressing battery tabs. The pressforming conductive compact includes a floating compact 200 and a conductive block 300, the floating compact 200 is disposed on the laminate 100, the conductive block 300 is disposed on a surface of the floating compact 200, and an inclined guide portion 301 extends inside the conductive block 300. In the process of forming the battery by loading the battery between the two pressing plates 100, when the battery is translated towards one side to enable the lug to be lapped on the conductive block 300, the lug is guided to the plane of the conductive block 300 through the guide part 301, so that the lug is prevented from being butted on the side surface of the floating pressing block, and the lug of the battery can be ensured to be normally formed by electric connection.

Further, referring to fig. 1 to 3, the floating pressure block 200 is further provided with an inclined surface 201, and an inner side surface of the guide portion 301 is attached to the inclined surface 201. The inclined surface of the floating press block 200 supports the guide portion 301, and the guide portion 301 is prevented from being deformed.

Further, referring to fig. 2 and 3, a step 202 extends from one end of the inclined surface 201 of the floating pressure block 200, and an end of the guide portion 301 overlaps the step 202. And it is possible to prevent the tabs of the battery from abutting against the end of the guide 301 and to increase the stability of the connection of the conductive block 300 to the floating pressure block 200.

Further, an included angle between the guide portion 301 and the outer surface of the conductive block 300 is 30 to 45 °.

Further, referring to fig. 2 and 3, the floating pressing block 200 includes a compression spring 210, a pressing block 220, and a limiting plate 230. The laminated board 100 is provided with a cavity 101, the compression spring 210 is arranged in the cavity 101, the limiting plate 230 is arranged at the mouth of the cavity 101, and the pressing block 220 penetrates through the limiting plate 230 and extends into the cavity 101 to abut against the compression spring 210. The two sides of the pressing block 220 are provided with limiting parts 221 limited at the inner side of the limiting plate 230, and the conductive block 300 is arranged on the pressing block 220.

Further, referring to fig. 2 and 3, a wire slot 102 is further provided on an outer side of the cavity 101, and one end of the wire slot 102 extends to a bottom side of the laminate 100. Therefore, wires connected with the conductive block 300 can be accommodated in the wire slot 102, and the problem of interference and the like caused when the wires are used for forming a battery is avoided.

Further, referring to fig. 2 and 3, a wire clamp 103 is further disposed at a lower end of the wire casing 102 for clamping a wire. The wire arranged in the wire groove 102 can pass through the wire clamp 103, so that the wire arrangement and fixing effects are achieved, and the wire is prevented from being loose.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure formation conductive pressing block structure is arranged on a laminated board and used for pressing a battery tab; the laminated board is characterized by comprising a floating pressing block and a conductive block, wherein the floating pressing block is arranged on the laminated board, the conductive block is arranged on the surface of the floating pressing block, and an inclined guide part extends from the inner side of the conductive block.

2. The pressor-forming electrically conductive compact structure of claim 1, wherein: the floating pressing block is further provided with an inclined plane, and the inner side face of the guide portion is attached to the inclined plane.

3. The pressor formed conductive compact structure of claim 2, wherein: one end of the inclined plane of the floating pressing block extends to form a step, and the end part of the guide part is lapped on the step.

4. The pressure-formed conductive compact structure according to any one of claims 1 to 3, characterized in that: the included angle between the guide part and the surface of the conductive block is 30-45 degrees.

5. The pressor-forming electrically conductive compact structure of claim 1, wherein: the floating pressing block comprises a compression spring, a pressing block and a limiting plate; the laminated board is provided with a concave cavity, the compression spring is arranged in the concave cavity, the limiting plate is arranged at the opening of the concave cavity, and the pressing block penetrates through the limiting plate and extends into the concave cavity to be abutted against the compression spring; the two sides of the pressing block are provided with limiting parts which are limited on the inner sides of the limiting plates, and the conductive blocks are arranged on the pressing block.

6. The pressure formed conductive compact structure of claim 5, wherein: and a wire groove is further formed in the outer side of the concave cavity, and one end of the wire groove extends to the bottom side of the laminated board.

7. The pressure formed conductive compact structure of claim 6, wherein: the lower end of the wire groove is also provided with a wire clamp for clamping a wire.