Battery repair welding device

Abstract

The utility model provides a battery repair welding device which comprises a repair welding base station, a battery fixing clamp, a repair welding protective cover and a repair welding station, the battery fixing clamp, the repair welding protective cover and the repair welding station are arranged on the repair welding base station, the battery fixing clamp is used for clamping and fixing a battery to be subjected to repair welding on the repair welding station, and the repair welding protective cover is used for protecting the battery to be subjected to repair welding during repair welding. A battery to be subjected to repair welding is placed in the battery fixing clamp to be fixed, then the repair welding protective cover is placed above the battery to be subjected to repair welding, and the battery to be subjected to repair welding is fed into a repair welding station to be subjected to laser welding; the repair welding protection cover is additionally designed in the battery repair welding device, so that the battery can be prevented from being damaged by welding slag splashing in the laser welding process.

Description

Technical Field

[0001] This utility model relates to the technical field of square energy storage battery equipment, and in particular to a battery repair welding device. Background Technology

[0002] Square aluminum-cased lithium batteries have many advantages, such as simple structure, good impact resistance, high energy density, and large single-cell capacity. They have always been the main direction of lithium battery manufacturing and development in China, accounting for more than 40% of the market.

[0003] The manufacturing and assembly of square aluminum-cased lithium batteries requires extensive use of laser welding technology, such as welding of cell soft connections to cover plates, cover plate sealing welding, and sealing nail welding. Laser welding is the main welding method for square power batteries, thanks to its many advantages, including high energy density, good power stability, high welding precision, and ease of system integration. It plays an irreplaceable role in the production process of square aluminum-cased lithium batteries.

[0004] In the full welding process of square aluminum-cased lithium batteries, welding defects may occur between the cover plate and the aluminum casing opening, such as laser burns, incomplete welds, and cracks. These defects require repair by adding filler material (welding wire) using welding repair equipment. During actual production, workers have found that welding slag dust is generated during the filler welding process. This welding slag dust can fall into the battery through the battery cover's electrolyte filling nozzle, potentially causing short circuits and directly affecting the battery's safety performance and lifespan.

[0005] A Chinese patent document, CN205900713U, discloses a "Battery Module Cold Solder Detection and Repair System." This system includes a battery module; a high-current charge / discharge instrument electrically connected to the battery module for charging and discharging; an infrared thermometer for detecting the temperature of various welding points on the battery module; and a repair welding system for repairing cold solder joints. This invention utilizes a high-current charge / discharge instrument to perform high-current, short-time charging and discharging on the battery module, while simultaneously using an infrared thermometer to detect the temperature of various welding points. When the temperature of a welding point exceeds an alarm temperature, a cold solder joint is detected, allowing for quick and easy identification of cold solder joints. Cold solder joints can be directly repaired using the repair welding system, preventing the cold solder joint module from flowing into the next step and wasting materials and time. However, this patent still has the problem that during the repair welding process, welding slag and dust fall through the battery cover's electrolyte inlet into the battery, causing a short circuit and directly affecting the battery's safety performance and lifespan. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a battery repair welding device to solve the problem that welding slag and dust are generated during the filler welding process of batteries in the prior art. The welding slag and dust will fall into the battery through the battery cover liquid injection nozzle, which may cause short circuit in severe cases and directly affect the safety performance and service life of the battery.

[0007] To achieve the above-mentioned and other related objectives, this utility model is implemented through the following technical solutions.

[0008] This utility model provides a battery repair welding device, including a repair welding base and a battery fixing clamp, a repair welding protective cover and a repair welding station disposed on the repair welding base. The battery fixing clamp is used to clamp and fix the battery to be repaired on the repair welding station, and the repair welding protective cover is used to protect the battery to be repaired during repair welding.

[0009] This invention secures the battery to be repaired by placing it in a battery clamp, then placing a protective cover on top of the battery before sending it to the welding station for laser welding. The protective cover, added to the battery welding device, prevents weld spatter from damaging the battery during laser welding.

[0010] Preferably, the battery to be repaired includes a battery casing and an injection hole, an explosion-proof valve, and battery terminals located above the battery casing, and the repair welding protective cover at least covers the injection hole, the explosion-proof valve, and the battery terminals.

[0011] This invention uses a welded protective cover to block the electrolyte injection hole, which prevents dust or metal spatter from entering the battery and causing a short circuit. In addition, the welded protective plate also protects the battery's explosion-proof valve, preventing damage to the valve caused by welding slag during laser welding, which would prevent the battery from effectively releasing abnormal pressure according to its original design mechanism.

[0012] Preferably, the welded protective cover is detachably and fixedly connected to the battery casing.

[0013] Preferably, the welded protective cover is snapped and fixed to the battery casing.

[0014] Preferably, the battery fixing fixture includes a clamp and a clamping drive. The clamp includes a baffle adapted to the battery to be repaired and a movable plate that forms a clamping space after being enclosed by the baffle. The clamping drive is used to drive the movable plate close to the baffle to clamp and fix the battery to be repaired.

[0015] Preferably, the battery fixing clamp further includes a clamping control component, and the clamping drive component is used to control the clamping drive component to drive the movable plate away from or towards the baffle.

[0016] Preferably, the clamping drive component is a cylinder.

[0017] Preferably, the battery fixing fixture further includes a displacement driving component, which is used to drive the fixture to clamp and fix the battery to be repaired on the repair welding station.

[0018] Preferably, the battery fixing fixture further includes a displacement drive control component, which is used to control the displacement drive component to drive the fixture to clamp and fix the battery to be repaired on the repair welding station.

[0019] Preferably, the displacement drive is a servo electric cylinder.

[0020] As described above, the battery repair welding device of this utility model has the following beneficial effects: by placing the battery to be repaired into the battery fixing fixture to fix the battery, and then placing the repair welding protective cover on top of the battery to be repaired, the battery to be repaired is sent into the repair welding station for laser welding; by adding a repair welding protective cover to the battery repair welding device, it is possible to prevent welding slag from splashing and damaging the battery during the laser welding process. Attached Figure Description

[0021] Figure 1 The diagram shows a three-dimensional structure of a battery repair welding device.

[0022] Figure 2 Displayed as Figure 1 Top view.

[0023] Figure 3 The diagram shows the assembly structure of the battery casing and the welded protective cover.

[0024] Figure 4 The diagram shows an exploded view of the battery casing and the welded protective cover.

[0025] Figure 5 The diagram shows the structure of the protective cover for welding repair.

[0026] The reference numerals are as follows: 1. Welding base; 2. Welding protective cover; 3. Welding station; 4. Battery to be welded; 41. Battery casing; 42. Injection hole; 43. Explosion-proof valve; 44. Battery terminal; 5. Clamp; 51. Baffle; 52. Movable plate; 6. Clamping drive; 61. Clamping control; 7. Displacement drive; 71. Displacement drive control. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] Please see Figures 1 to 5It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0029] like Figure 1 As shown, this utility model provides a battery repair welding device, including a repair welding base 1 and a battery fixing clamp, a repair welding protective cover 2, and a repair welding station 3 disposed on the repair welding base. The battery fixing clamp is used to clamp and fix the battery 4 to be repaired to the repair welding station, and the repair welding protective cover is used to protect the battery to be repaired during repair welding. The battery to be repaired includes a battery casing 41 and an injection hole 42, an explosion-proof valve 43, and a battery terminal 44 disposed on the top of the battery casing. The repair welding protective cover at least covers the injection hole, the explosion-proof valve, and the battery terminal. The repair welding protective cover is detachably and fixedly connected to the battery casing, and the repair welding protective cover is snap-fitted and fixed to the battery casing.

[0030] The battery fixing fixture includes a clamp 5, a clamping drive 6, a displacement drive 7, a clamping control 61, and a displacement drive control 71. The clamp includes a baffle 51 adapted to the battery to be repaired and a movable plate 52 forming a clamping space when enclosed by the baffle. The clamping control controls the clamping drive to move the movable plate away from or towards the baffle. When it approaches the baffle, the clamp holds and fixes the battery to be repaired. The clamping drive is a cylinder. The displacement drive control controls the displacement drive to drive the clamp to hold and fix the battery to be repaired on the repair welding station. Both the clamping control and the displacement drive control are control buttons mounted on the repair welding base 1.

[0031] The working principle of this utility model is as follows:

[0032] Place the battery 4 to be repaired into the clamp 5, press the clamping control 61 to control the clamping drive to drive the movable plate close to the baffle to fix the battery to be repaired.

[0033] The electrolyte injection hole 42, explosion-proof valve 43, and battery terminal 44 of the battery to be repaired are covered by a repair welding protective cover 2.

[0034] Press the displacement drive control unit 71 to send the battery to be repaired into the repair welding station 3 for laser welding, and the repair welding is completed.

[0035] In summary, this invention secures the battery to be repaired by placing it in a battery clamp, then places a protective cover on top of the battery before sending it to the welding station for laser welding. The addition of a protective cover within the welding device prevents weld spatter from damaging the battery during laser welding. Therefore, this invention effectively overcomes the shortcomings of existing technologies and possesses high industrial applicability.

[0036] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A battery repair welding device, characterized in that, It includes a welding base (1) and a battery fixing fixture, a welding protection cover (2) and a welding station (3) provided on the welding base. The battery fixing fixture is used to clamp and fix the battery (4) to be welded to the welding station. The welding protection cover is used to protect the battery to be welded during welding.

2. The battery repair welding device according to claim 1, characterized in that: The battery to be repaired includes a battery casing (41) and an injection hole (42), an explosion-proof valve (43) and a battery terminal (44) located on the top of the battery casing. The repair protection cover at least covers the injection hole, the explosion-proof valve and the battery terminal.

3. The battery repair welding device according to claim 1, characterized in that: The repair welded protective cover is detachably and fixedly connected to the battery casing.

4. The battery repair welding device according to claim 3, characterized in that: The repaired protective cover is snapped and fixed to the battery casing.

5. The battery repair welding device according to claim 1, characterized in that: The battery fixing fixture includes a clamp (5) and a clamping drive (6). The clamp includes a baffle (51) adapted to the battery to be repaired and a movable plate (52) that forms a clamping space after being enclosed by the baffle. The clamping drive is used to drive the movable plate to approach the baffle to clamp and fix the battery to be repaired.

6. The battery repair welding device according to claim 5, characterized in that: The battery fixing clamp also includes a clamping control component (61), which is used to control the clamping drive component to drive the movable plate away from or closer to the baffle.

7. The battery repair welding device according to claim 5 or 6, characterized in that: The clamping drive component is a cylinder.

8. The battery repair welding device according to claim 5, characterized in that: The battery fixing fixture also includes a displacement drive (7), which is used to drive the fixture to clamp and fix the battery to be repaired on the repair welding station.

9. The battery repair welding device according to claim 8, characterized in that: The battery fixing fixture also includes a displacement drive control component (71), which is used to control the displacement drive component to drive the fixture to clamp and fix the battery to be repaired on the repair welding station.

10. The battery repair welding device according to claim 8 or 9, characterized in that: The displacement drive component is a servo electric cylinder.

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