CN216958185U - Pressure formation floating compaction structure - Google Patents

Abstract

The utility model belongs to the technical field of formation and clamping of polymer soft package lithium ion batteries, and particularly relates to a pressure formation floating compression structure which comprises a laminated board and a floating compression piece; a plurality of installation positions are oppositely arranged on two sides of the laminated board, and the floating pressing piece is arranged on each installation position; the floating pressing piece comprises a compression elastic piece, a pressing block and a current conducting plate; the compression elastic component sets up on the installation position, and briquetting and compression elastic component butt, the outside release of compression elastic component the briquetting, the current conducting plate sets up the surface at the briquetting for switch on the utmost point ear of battery. When the pole ear is clamped, the compression elastic pieces in the two groups of floating pressing pieces are compressed, so that the two current conducting plates press the pole ear tightly, and the contact stability and the contact area of the pole ear and the current conducting plates are further ensured; the quality of battery formation and battery formation is ensured.

Description

Pressure formation floating compaction structure

Technical Field

The utility model belongs to the technical field of formation and clamping of polymer soft package lithium ion batteries, and particularly relates to a pressure formation floating compression structure.

Background

The polar aprotic solvent serving as the polymer soft package lithium ion battery inevitably reacts on an electrode and an electrolyte surface in the first charge and discharge process of the polymer soft package lithium ion battery to form a passivation film covered on the surface of the electrode, namely an electronic insulating film or a solid electrolyte film (SEI film). 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 needs long-time charging and discharging, and not only needs to accurately control the magnitude of the voltage or current of the charging and discharging, but also needs to accurately control the pulse waveform of the voltage and the current of the charging and discharging during the charging so as to prevent the SEI film impedance from increasing, thereby influencing the rate discharging performance of the polymer soft package lithium ion battery and improving the production efficiency in the formation process. The higher the control accuracy of voltage and current, the better the quality of lithium battery products.

Therefore, in the formation process, the pressing block contacting the tab requires a contact surface, and the pressing block material has requirements. In the existing formation equipment, the pressing block is used for fixing the lug on one side and elastically floating the pressing piece on the other side. For small enterprises and single enterprises, manual operation is difficult to guarantee quality control, and each battery core tab is a close contact pressing block. The line production equipment can cause the phenomenon that the pressing block is not compacted, the contact of the contact surface is insufficient, and the quality of the battery can be influenced during charging and discharging.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pressure formation floating compression structure, which solves the problem that a tab is difficult to completely attach to a conductive surface when a polymer soft package lithium ion battery is formed, so that the contact surface is insufficient.

In order to achieve the above object, an embodiment of the present invention provides a floating pressing structure, including a laminated board and a floating pressing member; a plurality of mounting positions are oppositely arranged on two sides of the laminated board, and the floating pressing piece is arranged on each mounting position and used for clamping a battery tab; the floating pressing piece comprises a compression elastic piece, a pressing block and a current-conducting plate; the compression elastic part sets up on the installation position, the briquetting with compression elastic part butt, the compression elastic part is outwards released the briquetting, the current conducting plate sets up the surface of briquetting for switch on the utmost point ear of battery.

Furthermore, the installation position is an inwards-concave cavity, the elastic compression piece is arranged in the cavity, one end of the pressing block is limited in the cavity, and the other end of the pressing block extends out of the cavity.

Further, the floating pressing piece further comprises a limiting plate arranged at the opening of the cavity, clearance openings are formed in the limiting plate, limiting steps are arranged on two sides of the pressing block and used for limiting inner edges of the clearance openings of the limiting plate.

Furthermore, grooves are further formed in two ends of the mounting position, and two ends of the limiting plate stretch across the grooves and are locked on the laminated board.

Furthermore, the outer side of the conductive plate also extends to form an electric connection part, and a connection hole is formed in the electric connection part.

Further, a wire casing is further arranged on the outer side close to the installation position, and one end of the wire casing 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 solutions in the floating compaction structure for pressure formation provided by the embodiment of the present invention at least have the following technical effects:

1. when the laminated plate compresses the battery, the floating compression pieces on the opposite sides of the two layers of the laminated plates are respectively compressed on the two sides of the lug and mutually extrude to enable the two floating compression pieces on the opposite sides to mutually clamp the lug of the battery, and when the lug is clamped, the compression elastic pieces in the two groups of the floating compression pieces are compressed to enable the two conductive plates to compress the lug so as to ensure the contact stability and the contact area of the lug and the conductive plates; the battery normalization and battery formation quality are ensured.

2. When compressing tightly utmost point ear, a current conducting plate is all connected to the both sides of utmost point ear, increases the conducting area, and then increases electric conductive property for the electric current that becomes can accurately control more, the further quality that guarantees the battery formation.

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 floating compaction-based compression mechanism according to an embodiment of the present invention.

Fig. 2 is a partially enlarged view of a pressure-forming floating compaction structure provided by an embodiment of the utility model.

Fig. 3 is a block diagram of another side of a floating compaction configuration for compaction provided by an embodiment of the utility model.

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 pressor floating compaction structure includes a laminate 100 and a floating compaction member 200. A plurality of mounting positions 101 are oppositely arranged on two sides of the laminated board 100, and the floating pressing piece 200 is arranged on each mounting position 101 and used for clamping a battery tab. The floating pressing member 200 includes a compression elastic member 210, a pressing piece 220, and a conductive plate 230. The compression elastic member 210 is arranged on the mounting position 101, the pressing block 220 abuts against the compression elastic member 210, the compression elastic member 210 pushes the pressing block 220 outwards, and the conductive plate 230 is arranged on the outer surface of the pressing block 220 and used for conducting the pole lug of the battery. When the laminated plate 100 compresses the battery, the floating compression pieces 200 at the opposite sides of the two layers of the laminated plates 100 are respectively compressed at the two sides of the tab and mutually extrude to enable the two floating compression pieces 200 at the opposite sides to mutually clamp the tab of the battery, when the tab is clamped, the compression elastic pieces 210 in the two groups of floating compression pieces 200 are compressed to enable the two conductive plates 230 to tightly press the tab and provide certain compression force for the tab, so that the contact stability and the contact area of the tab and the conductive plates 230 are ensured; the battery normalization and battery formation quality are ensured. And when compressing tightly utmost point ear, a current-conducting plate 230 is all connected to the both sides of utmost point ear, increases the conductive area, and then increases electric conductive property for the electric current that becomes can more accurately control, the further quality that guarantees the battery formation.

Further, referring to fig. 1 to 3, the mounting position 101 is an inwardly recessed cavity, the elastic compression element 210 is disposed in the cavity, one end of the pressing block 220 is limited in the cavity, and the other end of the pressing block extends out of the cavity. In this embodiment, the pressing block 220 can be accommodated in the cavity, so that when the battery is pressed, the distance between the laminated plates 100 can be reduced, and the formation clamp can adapt to the pressure formation of the battery with various thicknesses.

Further, referring to fig. 1 to 3, the floating pressing piece 220 further includes a limiting plate 240 disposed at the mouth of the cavity, the limiting plate 240 is provided with an air-avoiding opening, and the two sides of the pressing block 220 are provided with limiting steps 221 for limiting the inner edge of the air-avoiding opening of the limiting plate 240.

Further, grooves 102 are further formed in two ends of the mounting position 101, and two ends of the limiting plate 240 cross the grooves 102 and are locked to the laminate board 100. In this embodiment, the contact area between the limiting plate 240 and the laminate 100 can be reduced, and the interference effect caused by thermal deformation of the limiting plate 240 is reduced when the formation hot pressing is performed.

Further, referring to fig. 1 to 3, an electrical connection part 231 extends from the outer side of the conductive plate 230, and a connection hole 232 is formed in the electrical connection part 231. Thereby facilitating electrical connection of the conductive plate 230.

Further, referring to fig. 1 to 3, a wire slot 103 is further disposed near an outer side of the mounting position 101, and one end of the wire slot 103 extends to a bottom side of the laminate 100. Therefore, the electric wires connected with the conductive plate 230 can be accommodated in the wire slot 103, and the problem of interference caused by the electric wires to the battery is avoided.

Further, referring to fig. 1 to 3, a wire clamp 104 is further disposed at a lower end of the wire casing 103 for clamping a wire. The wire arranged in the wire groove 103 can pass through the wire clamp 104, so that the wire can be tidied and fixed, 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 (7)

1. A pressor floating compaction structure comprising a laminate and a floating compaction member; a plurality of mounting positions are oppositely arranged on two sides of the laminated board, and the floating pressing piece is arranged on each mounting position and used for clamping a battery tab; the floating pressing piece comprises a compression elastic piece, a pressing block and a current-conducting plate; the compression elastic part sets up on the installation position, the briquetting with compression elastic part butt, the compression elastic part is outwards released the briquetting, the current conducting plate sets up the surface of briquetting for switch on the utmost point ear of battery.

2. The pressure-forming floating compaction structure of claim 1, wherein: the installation position is an inwards-concave cavity, the compression elastic piece is arranged in the cavity, one end of the pressing block is limited in the cavity, and the other end of the pressing block extends out of the cavity.

3. The pressure-forming floating compaction structure of claim 2, wherein: the floating compression piece further comprises a limiting plate arranged at the opening of the cavity, clearance openings are formed in the limiting plate, limiting steps are arranged on two sides of the pressing block and used for limiting inner edges of the clearance openings of the limiting plate.

4. The pressure-forming floating compaction structure of claim 3, wherein: grooves are further formed in two ends of the mounting position, and two ends of the limiting plate stretch across the grooves and are locked on the laminated board.

5. The pressure-forming floating compaction structure according to any one of claims 1 to 4, wherein: the outer side of the conductive plate also extends to form an electric connection part, and a connection hole is formed in the electric connection part.

6. The pressure-forming floating compaction structure of claim 5, wherein: and a wire groove is further arranged on the outer side close to the mounting position, and one end of the wire groove extends to the bottom side of the laminated board.

7. The pressure-forming floating compaction structure of claim 6, wherein: the lower end of the wire groove is also provided with a wire clamp for clamping a wire.

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