Lithium battery parallel clamp

Abstract

The utility model relates to the technical field of battery formation clamps, in particular to a lithium battery parallel connection clamp which comprises a bottom plate and a PCB installed on the bottom plate, the PCB is connected with the bottom plate in a buckled mode so that the PCB can be conveniently detached for maintenance and replacement, and a plurality of sets of positive electrode clamping assemblies and negative electrode clamping assemblies are arranged on the bottom plate at intervals. The positive electrode clamping assembly and the negative electrode clamping assembly are used for clamping the positive electrode lug and the negative electrode lug of the lithium battery respectively, the conductive blocks electrically connected to the PCB are arranged on the positive electrode clamping assembly and the negative electrode clamping assembly respectively, the conductive blocks are installed through the cross nuts, and the problems that the conductive blocks are inconvenient to replace and the maintenance cost is high are solved. The supporting strips are arranged on the sides, close to the lithium battery, of the positive electrode clamping assembly and the negative electrode clamping assembly, the tabs of the lithium battery are supported through the supporting strips, then irreversible distortion or damage caused when the tabs of the lithium battery are clamped can be effectively prevented, and the subsequent reworking cost caused by the quality problem of the lithium battery is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery formation technology, and in particular to a parallel clamp for lithium batteries. Background Art

[0002] Lithium batteries are now used in various fields. Lithium batteries mainly include positive electrodes, negative electrodes, separators between the positive and negative electrodes, and electrolytes that conduct ions between the positive and negative electrodes. The manufacturing process of lithium batteries generally includes the following steps: stirring, coating, cold pressing, cutting, winding (or lamination), injection, formation, capacity, etc. In the formation process, the lithium battery is first fixed and clamped, and then a small current is applied to charge, so that the electrolyte can form a layer of solid electrolyte membrane (SE I membrane) on the surface of the negative electrode to protect the negative electrode material.

[0003] When the formation clamps of existing formation equipment clamp the tabs of lithium batteries, they are prone to cause irreversible distortion or damage to the tabs of lithium batteries, resulting in quality problems of the lithium batteries and increased rework costs. Utility Model Content

[0004] In order to solve one of the above-mentioned technical problems, the present application provides a lithium battery parallel clamp, including a base plate, a PCB board installed on the base plate, and a plurality of groups of positive electrode clamping assemblies and negative electrode clamping assemblies are arranged at intervals on the base plate, and the positive electrode clamping assemblies and the negative electrode clamping assemblies are respectively provided with conductive blocks electrically connected to the PCB board, and support bars for supporting the lithium battery ears are provided on the side of the positive electrode clamping assemblies and the negative electrode clamping assemblies close to the lithium battery.

[0005] Preferably, the PCB board is provided with positive and negative terminals, and the PCB board is electrically connected to the conductive block via a wire.

[0006] Preferably, the surfaces of the conductive blocks and the positive and negative terminals are coated with a gold-plated coating.

[0007] Preferably, the positive electrode clamping assembly is fixedly arranged on the bottom plate, the negative electrode clamping assembly is movably connected to the bottom plate, and the negative electrode clamping assembly can be close to or away from the positive electrode clamping assembly.

[0008] Preferably, each group of the positive electrode clamping assembly and the negative electrode clamping assembly includes an upper clamping plate and a lower clamping plate for clamping the lithium battery tabs, the conductive block is connected to the lower clamping plate, and the upper clamping plate and the lower clamping plate are rotatably connected via an elastic reset assembly.

[0009] Preferably, the elastic reset assembly includes an ear plate arranged between the upper clamping plate and the lower clamping plate, a pin passing through the ear plate, and a reset spring sleeved on the pin, and both ends of the reset spring are respectively abutted against the upper clamping plate and the lower clamping plate.

[0010] Preferably, the bottom plate is provided with a scale groove, the lower clamping plate of the negative electrode clamping assembly is slidably connected to the scale groove, and an adjustment spring is used to adjust the position of the negative electrode clamping assembly in the scale groove.

[0011] Preferably, the lower clamping plate is connected to the conductive block via a cross nut.

[0012] Preferably, the base plate is also provided with a plurality of fixing columns for fixing the base plate.

[0013] Preferably, the bottom plate is also provided with a spare scale groove, and a fixing nut for cooperating with the spare scale groove to adjust the position of the negative electrode clamping assembly.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows: the present application scheme is to arrange several groups of positive electrode clamping components and negative electrode clamping components at intervals on the bottom plate, and the PCB board is connected with the bottom plate by buckles, so as to facilitate the disassembly of the PCB board for maintenance and replacement, the positive electrode clamping component and the negative electrode clamping component respectively clamp the positive and negative pole ears of the lithium battery, and the positive electrode clamping component and the negative electrode clamping component are respectively provided with conductive blocks electrically connected to the PCB board, and the conductive blocks are installed by cross nuts, so as to avoid the problems of inconvenience in replacing the conductive blocks and high maintenance costs. Then, the formation process of the lithium battery is realized, and a support bar for supporting the pole ear of the lithium battery is provided on the side of the positive electrode clamping component and the negative electrode clamping component close to the lithium battery, and the support bar can effectively prevent the irreversible distortion or damage of the pole ear of the lithium battery when it is clamped, thereby reducing the rework cost of the lithium battery caused by subsequent quality problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the description of the embodiments of the present application or the prior art are briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0016] Figure 1 A top view of an example of a parallel lithium battery fixture for implementing this application;

[0017] Figure 2 This is a side view of the lithium battery parallel clamp according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] In order to solve the above technical problems, this embodiment provides a lithium battery parallel clamp, such as Figure 1-2 As shown, it includes a base plate 10 and a PCB board 20 installed on the base plate 10, and a plurality of groups of positive electrode clamping assemblies 40 and negative electrode clamping assemblies 50 are arranged at intervals on the base plate 10. The positive electrode clamping assembly 40 and the negative electrode clamping assembly 50 are used to clamp the positive and negative electrode tabs of the lithium battery respectively. The positive electrode clamping assembly 40 and the negative electrode clamping assembly 50 are respectively provided with conductive blocks 30 electrically connected to the PCB board 20, so that a parallel circuit is formed between the clamped lithium batteries. A support bar 14 for supporting the lithium battery tab is provided on the side of the positive electrode clamping assembly 40 and the negative electrode clamping assembly 50 close to the lithium battery. The support bar 14 can effectively prevent the lithium battery tab from being irreversibly twisted or damaged when being clamped, thereby reducing the rework cost of the lithium battery due to subsequent quality problems.

[0020] Specifically, a card slot is provided on the bottom plate 10, and a buckle detachably connected to the card slot is provided on the PCB board 20. By buckling the buckle of the PCB board 20 with the card slot on the bottom plate 10, the PCB board 20 can be conveniently removed for maintenance and replacement, thereby avoiding the inconvenience of replacing the PCB board 20 and the high maintenance cost. At the same time, an arc groove is provided on the PCB board 20, which plays a positioning role, thereby preventing the fixture from falling.

[0021] The positive electrode clamping assembly 40 and the negative electrode clamping assembly 50 clamp the positive and negative electrodes of the battery respectively, and the PCB board 20 is provided with positive and negative terminals 21, which are respectively connected to the conductive blocks 30 on the positive electrode clamping assembly 40 and the negative electrode clamping assembly 50, and the positive and negative terminals 21 are connected to the external power supply equipment, and then the battery is charged by the conductive blocks 30 electrically connected to the positive and negative terminals 21, and the PCB board 20 is electrically connected to the conductive blocks 30 through wires. Multiple lithium battery tabs are clamped simultaneously by multiple positive electrode clamping assemblies 40 and negative electrode clamping assemblies 50, and then multiple lithium batteries are processed simultaneously.

[0022] Furthermore, in existing production, the conductive block 30 and the positive and negative terminals 21 are very susceptible to corrosion and oxidation by electrolyte and air, resulting in problems such as failure to charge at low voltage and rapid power loss. To this end, as a preferred embodiment, the surfaces of the conductive block 30 and the positive and negative terminals 21 are coated with a gold-plated coating. The gold-plated coating can effectively prevent the conductive block 30 from failing to charge at low voltage due to corrosion by electrolyte and metal oxidation, and metal oxidation of the positive and negative terminals 21, thereby improving the anti-oxidation ability, extending the service life of components, preventing the problem of lithium batteries failing to charge at low voltage, and ensuring the efficiency of lithium battery formation.

[0023] In the above scheme, the positive electrode clamping assembly 40 is fixedly arranged on the base plate 10, and the negative electrode clamping assembly 50 is movably connected to the base plate 10. The negative electrode clamping assembly 50 can be close to or away from the positive electrode clamping assembly 40. By adjusting the distance from the negative electrode clamping assembly 50 to the positive electrode clamping assembly 40, lithium batteries of different heights can be formed and charged, reducing the operation of changing the formation fixture and improving the efficiency of lithium battery formation.

[0024] Specifically, each group of positive electrode clamping assembly 40 and negative electrode clamping assembly 50 includes an upper clamping plate 71 and a lower clamping plate 72 for clamping the pole ears of the lithium battery. The conductive block 30 is connected to the clamping plate 72. The upper clamping plate 71 and the lower clamping plate 72 are rotatably connected through an elastic reset assembly 60. The elastic reset assembly 60 enables the upper clamping plate 71 to stably contact the pole ears of the clamped lithium battery with the clamping plate 72 connected to the conductive block 30.

[0025] Specifically, the elastic reset assembly 60 includes an ear plate 73 arranged between the upper clamping plate 71 and the lower clamping plate 72, a pin 61 inserted into the ear plate 73, and a reset spring 62 sleeved on the pin 61. The two ends of the reset spring 62 are respectively abutted against the upper clamping plate 71 and the lower clamping plate 72, so that the upper clamping plate 71 and the lower clamping plate 72 always have a tendency to clamp together, which can ensure that the lithium battery can be stable during formation and charging, avoid the device from shaking during the formation process, causing interruptions in formation and charging, thereby avoiding affecting the effect of lithium battery formation.

[0026] Specifically, the bottom plate 10 is provided with a graduated groove 12, the lower clamping plate 72 of the negative electrode clamping assembly 50 is slidably connected to the graduated groove 12, and an adjustment spring 13 is used to adjust the position of the negative electrode clamping assembly 50 in the graduated groove 12, and a support bar 14 is installed on the side of the lower clamping plate 72 close to the battery pole ear. According to different battery models, the graduated groove 12 cooperates with the adjustment spring 13 to more accurately adjust the distance between the negative electrode clamping assembly 50 and the positive electrode clamping assembly 40, so as to be compatible with lithium batteries of different sizes for the formation process and improve compatibility. Exemplarily, the support bar 14 can be made of silicone material, so that the support bar 14 will not fall off when the bottom plate 10 moves with the negative electrode clamping assembly 50, and the support bar 14 will not affect the formation charging effect by raising the lithium battery pole ear.

[0027] Specifically, the lower clamp plate 52 is connected to the conductive block 30 through a cross nut, which facilitates the installation and disassembly of the conductive block 30 and the lower clamp plate 52, avoiding the high cost caused by the inconvenience of replacing the conductive block 30, facilitating the replacement and maintenance of the conductive block 30, and reducing the problem of low-voltage charging and fast power loss caused by corrosion and oxidation of electrolyte and air.

[0028] Specifically, the base plate 10 is also provided with a plurality of fixing columns 17 for fixing the base plate 10. The fixing columns 17 can be used to fix the lithium battery parallel clamp on the formation equipment. At the same time, the arc groove on the PCB board 20 can be used to position the positive and negative terminal blocks 21, thereby achieving the purpose of accurately connecting to the external current and preventing the clamp from falling.

[0029] Specifically, the base plate 10 is also provided with a spare scale groove 15, and a fixing nut 16 for adjusting the position of the negative electrode clamping assembly 60 in cooperation with the spare scale groove 15. For example, the scale groove 15 can be a scale waist-shaped hole. By adjusting the fixing nut 16, the distance from the negative electrode clamping assembly 60 to the positive electrode clamping assembly 40 can be changed, thereby avoiding the situation where the negative electrode clamping assembly 60 cannot be adjusted due to damage of the adjustment spring 13.

[0030] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. A lithium battery parallel clamp, characterized in that: The invention comprises a base plate (10), a PCB board (20) connected to the base plate (10) by a detachable buckle, a plurality of groups of positive electrode clamping assemblies (40) and negative electrode clamping assemblies (50) are arranged at intervals on the base plate (10), the positive electrode clamping assemblies (40) and the negative electrode clamping assemblies (50) are respectively provided with conductive blocks (30) electrically connected to the PCB board (20), and a support bar (14) for supporting a lithium battery pole ear is provided on a side of the positive electrode clamping assemblies (40) and the negative electrode clamping assemblies (50) close to the lithium battery.

2. The lithium battery parallel connection fixture according to claim 1, characterized in that: The PCB board (20) is provided with positive and negative wiring terminals (21), and the PCB board (20) is electrically connected to the conductive block (30) via a wire.

3. The lithium battery parallel connection fixture according to claim 2, characterized in that: The surfaces of the conductive block (30) and the positive and negative wiring terminals (21) are coated with a gold-plated coating.

4. The lithium battery parallel connection fixture according to claim 1, characterized in that: The positive electrode clamping assembly (40) is fixedly arranged on the bottom plate (10), the negative electrode clamping assembly (50) is movably connected to the bottom plate (10), and the negative electrode clamping assembly (50) can be close to or away from the positive electrode clamping assembly (40).

5. The lithium battery parallel connection fixture according to claim 1, characterized in that: Each group of the positive electrode clamping assembly (40) and the negative electrode clamping assembly (50) comprises an upper clamping plate (71) and a lower clamping plate (72) for clamping the lithium battery pole ear, the conductive block (30) is connected to the lower clamping plate (72), and the upper clamping plate (71) and the lower clamping plate (72) are rotatably connected via an elastic reset assembly (60).

6. The lithium battery parallel connection fixture according to claim 5, characterized in that: The elastic reset assembly (60) comprises an ear plate (73) arranged between the upper clamping plate (71) and the lower clamping plate (72), a pin shaft (61) inserted into the ear plate (73), and a reset spring (62) sleeved on the pin shaft (61), wherein two ends of the reset spring (62) are respectively in contact with the upper clamping plate (71) and the lower clamping plate (72).

7. The lithium battery parallel connection fixture according to claim 6, characterized in that: The bottom plate (10) is provided with a graduated groove (12), the lower clamping plate (72) of the negative electrode clamping assembly (50) is slidably connected to the graduated groove (12), and an adjustment spring (13) is provided for adjusting the position of the negative electrode clamping assembly (50) in the graduated groove (12).

8. The lithium battery parallel connection fixture according to claim 6, characterized in that: The lower clamping plate (72) is connected to the conductive block (30) via a cross nut.

9. The lithium battery parallel connection fixture according to claim 1, characterized in that: The bottom plate (10) is also provided with a plurality of fixing columns (17) for fixing the bottom plate (10).

10. The lithium battery parallel connection fixture according to claim 7, characterized in that: The bottom plate (10) is also provided with a spare scale groove (15) and a fixing nut (16) for cooperating with the spare scale groove (15) to adjust the position of the negative electrode clamping assembly (50).

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