Lithium ion battery liquid injection equipment

Abstract

The utility model relates to lithium ion battery liquid injection equipment, which relates to the technical field of battery liquid injection and comprises a liquid injection gun, a liquid injection channel is arranged in a liquid injection cavity, a liquid inlet is arranged at one end of the liquid injection channel, a liquid outlet is arranged at the other end of the liquid injection channel, and a group of baffles are symmetrically arranged on one side of the liquid outlet far away from the liquid inlet. The opposite faces of the baffles are used for abutting against each other, the liquid outlet plates are fixedly arranged on the two sides of the baffles, the opposite faces of the liquid outlet plates are used for abutting against each other, the side plates are fixedly arranged on the back faces of the baffles and the back faces of the liquid outlet plates jointly, the side plates are obliquely arranged, and the top plates are fixedly arranged on the tops of the side plates and the tops of the liquid outlet plates jointly. The opposite face of the top plate is connected with a liquid injection gun, a liquid outlet cavity is formed among the baffle, the liquid outlet plate, the side plate and the top plate, a liquid outlet channel is formed in the liquid outlet plate in a penetrating mode, and the liquid outlet channel is communicated with the liquid outlet cavity. The battery has the effects of reducing the situation that the electrolyte impacts the battery cell and reducing the production cost of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery liquid injection technical field especially to a lithium ion battery liquid injection equipment. BACKGROUND

[0002] Lithium ion battery liquid injection is that after the liquid injection gun is inserted into the cover plate of the battery, the electrolyte is injected into the battery through the gun mouth. The defect of this liquid injection method is that when the liquid injection speed is too fast, the electrolyte will directly impact the battery, causing the impacted area to become loose. At present, in order to solve this problem, the general method is to integrate a baffle on the top cover.

[0003] The related technology designs a Chinese patent with the authorization announcement number CN214542473U to provide a power battery top cover lower plastic liquid injection structure and power battery top cover, which includes a plastic plate body, a liquid injection hole is arranged on the plastic plate body, a connecting part extending along a first direction is arranged on the lower edge of the liquid injection hole, one end of the connecting part away from the plastic plate body is connected with a baffle part, and a first gap channel for liquid injection is formed between the baffle part and the plastic plate body. When liquid injection, the liquid injection port of the liquid injection equipment is aligned with the liquid injection hole and liquid injection is carried out. The electrolyte with a certain pressure will directly impact the baffle part and flow into the battery interior along the first gap channel. The baffle part plays a buffering role for the electrolyte, and through the guiding action of the first gap channel, the electrolyte flows into the battery from the side of the battery cover plate, avoiding the problem of direct impact of the electrolyte on the battery core, causing the diaphragm to fall off.

[0004] In the process of implementing the present application, the inventors found that at least the following problems exist in the technology: In the production process of the battery top cover, additional steps and time are needed to form the connecting part and the baffle part at the liquid injection hole, which increases the processing time and manufacturing cost of the top cover, thereby increasing the production cost of the battery. UTILITY MODEL CONTENTS

[0005] In order to reduce the impact of the electrolyte on the battery core and reduce the production cost of the battery, the present application provides a lithium ion battery liquid injection equipment.

[0006] The lithium ion battery liquid injection equipment provided by the present application adopts the following technical scheme:

[0007] The application discloses a lithium ion battery liquid injection equipment, which comprises a liquid injection gun, a liquid injection channel arranged in the liquid injection cavity, a liquid inlet arranged at one end of the liquid injection channel, a liquid outlet arranged at the other end of the liquid injection channel, a plurality of baffle plates symmetrically arranged on the side of the liquid outlet away from the liquid inlet, the opposite surfaces of the baffle plates being used for abutting against each other, liquid outlet plates fixedly arranged on the two sides of the baffle plates, the opposite surfaces of the liquid outlet plates being used for abutting against each other, side plates fixedly arranged on the opposite surfaces of the baffle plates and the opposite surfaces of the liquid outlet plates, the side plates being arranged in an inclined mode, a top plate fixedly arranged on the top of the side plates and the top of the liquid outlet plates, the opposite surfaces of the top plate being connected with the liquid injection gun, a liquid outlet cavity being formed between the baffle plates, the liquid outlet plates, the side plates and the top plate, a liquid outlet channel being formed in the liquid outlet plate and communicated with the liquid outlet cavity.

[0008] When the liquid injection gun is used to inject electrolyte into the battery, the liquid outlet of the liquid injection gun is inserted into the liquid inlet of the battery cover plate, the liquid outlet cavity formed between the baffle plates, the liquid outlet plates, the side plates and the top plate is located at the end of the liquid outlet away from the liquid injection channel, and after the electrolyte is sprayed out of the liquid outlet, the electrolyte with a certain pressure directly impacts the baffle plates and then flows into the battery through the liquid outlet channel, so that the baffle plates play a buffering role on the electrolyte, the electrolyte flows into the battery from the side of the battery top cover through the guiding role of the liquid outlet channel, the electrolyte impact on the battery is reduced, only the baffle plates, the liquid outlet plates, the side plates and the top plate need to be arranged on the liquid injection gun, the original mode of forming the connecting part and the baffle part at each liquid inlet of the battery top cover is replaced, the processing time of the battery top cover is shortened, the manufacturing cost of the battery top cover is reduced, the electrolyte impact on the battery core is reduced, and the battery production cost is reduced.

[0009] Preferably, the opposite surfaces of the top plate are rotationally connected with the outer wall of the liquid injection gun, a driving arm is rotationally arranged on the opposite surface of the top plate, a driving block is rotationally arranged on the end of the driving arm away from the top plate, a driving sleeve is arranged on the driving block, and the driving sleeve is slidingly connected with the outer wall of the liquid injection gun.

[0010] Through the above technical scheme, the movement of the driving sleeve drives the movement of the driving block, the movement of the driving block drives the rotation of the driving arm, so that the top plate, the side plate, the baffle plate and the liquid outlet plate are synchronously rotated, when the driving sleeve moves upward, the side plate approaches the liquid injection gun, and the opposite surfaces of the baffle plates are away from each other, so that the distance between the side plates is shortened, the top plate, the side plate, the baffle plate and the liquid outlet plate are conveniently put in and out of the liquid injection hole, when the driving sleeve moves downward, the side plate is away from the liquid injection gun, and the opposite surfaces of the baffle plates are close to each other, when the opposite surfaces of the baffle plates abut against each other, the opposite surfaces of the liquid outlet plates also abut against each other, so that the liquid outlet cavity formed between the baffle plates, the liquid outlet plates, the side plates and the top plate is formed.

[0011] Preferably, a plurality of guide grooves are formed in the outer wall of the liquid injection gun, and a guide block is slidingly arranged in the guide grooves and fixedly connected with the inner wall of the driving sleeve.

[0012] By adopting the technical scheme, the guide block on the driving sleeve moves along the guide groove, so that the driving sleeve is not easy to fall off the liquid injection gun.

[0013] Preferably, a driving cylinder is fixedly arranged on the outer wall of the liquid injection gun, and an output shaft of the driving cylinder is fixedly connected with the top of the driving sleeve.

[0014] By adopting the technical scheme, the driving cylinder drives the driving sleeve to move along the guide groove, so that manual movement of the driving sleeve is reduced.

[0015] Preferably, a sealing ring sleeve is sleeved on the driving sleeve, and a sealing rubber layer is arranged at the bottom of the sealing ring sleeve.

[0016] By adopting the technical scheme, when the liquid outlet cavity is formed between the baffle, the liquid outlet plate, the side plate and the top plate, the sealing rubber layer abuts against the top cover of the battery, so that the liquid injection hole is sealed.

[0017] Preferably, an external thread groove is arranged on the outer wall of the driving sleeve, an internal thread groove is arranged on the inner wall of the sealing ring sleeve, and the internal thread groove is threadedly connected with the external thread groove.

[0018] By adopting the technical scheme, the sealing ring sleeve is rotated, the sealing ring sleeve moves relatively with the driving sleeve, so that the relative position of the sealing rubber layer and the driving sleeve is adjusted, and the sealing rubber layer is abutted against the top cover of the battery with different thicknesses.

[0019] Preferably, a liquid injection pipe is arranged in communication with the liquid inlet, the liquid injection pipe is arranged in communication with a liquid injection pump away from the liquid injection gun, and an input end of the liquid injection pump is arranged in communication with a liquid injection tank.

[0020] By adopting the technical scheme, the electrolyte is stored in the liquid injection tank, the liquid injection pump is started to pump the electrolyte from the liquid injection tank into the liquid injection pipe, and the liquid injection pipe pumps the electrolyte from the liquid inlet into the liquid injection channel.

[0021] Preferably, a machine base is arranged at the bottom of the liquid injection tank, a machine frame is fixedly arranged on the machine base, a lifting cylinder is fixedly arranged on the machine frame, and an output shaft of the lifting cylinder is fixedly connected with the liquid injection gun.

[0022] By adopting the technical scheme, the lifting cylinder drives the liquid injection gun to move, so that the liquid outlet is conveniently inserted into and pulled out of the liquid injection hole.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. By arranging the liquid injection gun, the liquid injection channel, the liquid inlet, the liquid outlet, the baffle, the liquid outlet plate, the side plate, the top plate, the liquid outlet cavity and the liquid outlet channel, the electrolyte impact on the battery cell is reduced, and the battery production cost is reduced.

[0025] 2. By setting the driving arm, driving block and driving sleeve, it is convenient for the top plate, side plate, baffle and liquid outlet plate to enter and exit the liquid injection hole;

[0026] 3. By setting the sealing ring sleeve and sealing glue layer, the liquid injection hole is sealed. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of a lithium ion battery liquid injection equipment structure in the embodiment of the present application.

[0028] Figure 2 is Figure 1 is an enlarged view of part A in

[0029] Figure 3 is a schematic diagram of the connection relationship between the driving sleeve and the sealing ring sleeve in the embodiment of the present application.

[0030] Figure 4 is a sectional view showing the connection relationship between the liquid inlet and the liquid outlet in the embodiment of the present application.

[0031] Figure 5 is a sectional view showing the connection relationship between the baffle and the liquid injection gun in the embodiment of the present application.

[0032] Figure 6 is a sectional view showing the positional relationship between the liquid outlet and the liquid outlet cavity in the embodiment of the present application.

[0033] BRIEF DESCRIPTION OF DRAWINGS 1. Liquid injection gun; 11. Liquid injection channel; 12. Liquid inlet; 13. Liquid outlet; 2. Liquid outlet cavity; 21. Baffle; 22. Liquid outlet plate; 221. Liquid outlet channel; 23. Side plate; 24. Top plate; 3. Driving cylinder; 31. Driving sleeve; 32. Driving block; 33. Driving arm; 4. Guide groove; 41. Guide block; 5. Sealing glue layer; 51. Sealing ring sleeve; 511. Outer thread groove; 512. Inner thread groove; 6. Liquid injection tank; 61. Liquid injection pump; 62. Liquid injection pipe; 7. Lifting cylinder; 71. Machine frame; 72. Machine base; 8. Battery top cover; 81. Liquid injection hole. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying Figures 1-6 The present application will be further described in detail.

[0035] The embodiment of the present application discloses a lithium ion battery liquid injection equipment. Referring to Figures 1 to 6, including the base 72, the base 72 on the installation of the liquid injection tank 6, the liquid injection tank 6 on the communication is provided with a liquid supplement pipe, the liquid supplement pipe on the installation of the liquid supplement valve. Liquid injection tank 6 on the installation of the liquid injection pump 61, the input end of the liquid injection pump 61 and the liquid injection tank 6 are communicated with each other, the output end of the liquid injection pump 61 is communicated with the liquid injection pipe 62. The base 72 is installed on the rack 71, the rack 71 is installed on the lifting cylinder 7, the output shaft of the lifting cylinder 7 is installed on the liquid injection gun 1. The liquid injection gun 1 is provided with a liquid injection channel 11, one end of the liquid injection channel 11 is a liquid inlet 12, the liquid inlet 12 is communicated with the end of the liquid injection pipe 62 away from the liquid injection pump 61, the other end of the liquid injection channel 11 is a liquid inlet 12. A set of baffles 21 is symmetrically installed on the side of the liquid outlet 13 away from the liquid inlet 12, the opposite surfaces of the baffles 21 are used for mutual abutment. The liquid outlet plate 22 is installed on both sides of the baffle 21, the opposite surfaces of the liquid outlet plate 22 are used for mutual abutment. The side plate 23 is jointly installed on the opposite surfaces of the baffle 21 and the opposite surfaces of the liquid outlet plate 22, and the side plate 23 is inclined. The top plate 24 is jointly installed on the top of the side plate 23 and the top of the liquid outlet plate 22, and the opposite surfaces of the top plate 24 are connected with the liquid injection gun 1. When the opposite surfaces of the baffles 21 abut against each other, the opposite surfaces of the liquid outlet plates 22 abut against each other, at this time, the baffles 21, the liquid outlet plates 22, the side plate 23 and the top plate 24 form the liquid outlet cavity 2, the liquid outlet channel 221 is formed through the liquid outlet plate 22, and the liquid outlet channel 221 is communicated with the liquid outlet cavity 2. When the battery is liquid injected, the lifting cylinder 7 drives the liquid injection gun 1 to move, the liquid outlet 13 of the liquid injection gun 1 is inserted into the liquid inlet of the battery cover plate, so that the liquid outlet cavity 2 formed by the baffles 21, the liquid outlet plates 22, the side plate 23 and the top plate 24 is located at the end of the liquid outlet 13 away from the liquid injection channel 11. Then the liquid injection pump 61 is started, the electrolyte stored in the liquid injection tank 6 is pumped into the liquid injection pipe 62, and the liquid injection pipe 62 pumps the electrolyte from the liquid inlet 12 into the liquid injection channel 11. After the electrolyte is sprayed out of the liquid outlet 13, the electrolyte with a certain pressure will directly impact the baffle 21, and then flow into the battery through the liquid outlet channel 221. The baffle 21 plays a buffering role on the electrolyte, and the electrolyte flows into the battery from the side of the battery top cover 8 through the guiding action of the liquid outlet channel 221, reducing the impact of the electrolyte on the battery. And only need to add baffles 21, liquid outlet plates 22, side plates 23 and top plates 24 on the liquid injection gun 1, instead of the original way of forming a connecting part and a baffle 21 part at each liquid inlet of the battery top cover 8, thereby shortening the processing time of the battery top cover 8, reducing the manufacturing cost of the battery top cover 8, reducing the impact of the electrolyte on the battery core, and reducing the battery production cost.

[0036] In order to facilitate the top plate 24, the side plate 23, the baffle 21 and the liquid outlet plate 22 to enter and exit the liquid injection hole 81, referring to Figures 1 to 6, the opposite face of the top plate 24 is rotationally connected with the outer wall of the liquid injection gun 1, the opposite face of the top plate 24 is rotationally provided with a driving arm 33, the end of the driving arm 33 away from the top plate 24 is rotationally provided with a driving block 32, and the driving block 32 is commonly provided with a driving sleeve 31. The driving sleeve 31 is sleeved on the liquid injection gun 1, a plurality of guide grooves 4 are formed on the outer wall of the liquid injection gun 1, a guide block 41 is slidably arranged in the guide groove 4, and the guide block 41 is welded with the inner wall of the driving sleeve 31, so that the driving sleeve 31 is not easy to fall off from the liquid injection gun 1. The driving cylinder 3 is installed on the outer wall of the liquid injection gun 1, the output shaft of the driving cylinder 3 is welded with the top of the driving sleeve 31, and the manual movement of the driving sleeve 31 is reduced. The driving cylinder 3 moves the driving sleeve 31 along the guide groove 4, the driving sleeve 31 moves the driving block 32, and the driving block 32 rotates the driving arm 33, so that the top plate 24, the side plate 23, the baffle 21 and the liquid outlet plate 22 rotate synchronously. When the driving sleeve 31 moves upward, the side plate 23 approaches the liquid injection gun 1, and the opposite faces of the baffle 21 are away from each other, so that the distance between the side plates 23 is shortened, and the top plate 24, the side plate 23, the baffle 21 and the liquid outlet plate 22 are conveniently put into and out of the liquid injection hole 81. When the driving sleeve 31 moves downward, the side plate 23 moves away from the liquid injection gun 1, and the opposite faces of the baffle 21 approach each other, and when the opposite faces of the baffle 21 abut, the opposite faces of the liquid outlet plate 22 also abut, so that the liquid outlet cavity 2 is formed between the baffle 21, the liquid outlet plate 22, the side plate 23 and the top plate 24.

[0037] In order to seal the liquid injection hole 81, referring to Figures 1 to 6 , the sealing ring sleeve 51 is sleeved on the driving sleeve 31, and the sealing rubber layer 5 is installed at the bottom of the sealing ring sleeve 51. The outer thread groove 511 is formed on the outer wall of the driving sleeve 31, the inner thread groove 512 is formed on the inner wall of the sealing ring sleeve 51, and the inner thread groove 512 is threadedly connected with the outer thread groove 511. The sealing ring sleeve 51 is rotated, the sealing ring sleeve 51 moves relative to the driving sleeve 31, so as to adjust the relative position of the sealing rubber layer 5 and the driving sleeve 31, and the sealing rubber layer 5 is conveniently abutted with the battery top cover 8 with different thicknesses. When the liquid outlet cavity 2 is formed between the baffle 21, the liquid outlet plate 22, the side plate 23 and the top plate 24, the sealing rubber layer 5 is abutted on the battery top cover 8, so that the liquid injection hole 81 is sealed.

[0038] The implementation principle of the lithium ion battery liquid injection equipment embodiment of the present application is as follows: when the battery is injected, the liquid outlet 13 of the liquid injection gun 1 is inserted into the liquid injection port of the battery cover plate, and the liquid outlet cavity 2 is located at the end of the liquid outlet 13 away from the liquid injection channel 11. Then the liquid injection pump 61 is started, and the electrolyte with a certain pressure is sprayed out of the liquid outlet 13 and directly impacts on the baffle 21, and then flows into the battery along the liquid outlet channel 221, the baffle 21 plays a buffering role for the electrolyte, and through the guiding action of the liquid outlet channel 221, the electrolyte flows into the battery from the side of the battery top cover 8, reducing the case of electrolyte directly impacting the battery core. By adding the baffle 21, the liquid outlet plate 22, the side plate 23 and the top plate 24 on the liquid injection gun 1, instead of the original way of forming the connecting part and the baffle 21 part at the liquid injection port of each battery top cover 8, the processing time of the battery top cover 8 is shortened, the manufacturing cost of the battery top cover 8 is reduced, the case of electrolyte impacting the battery core is reduced, and the battery production cost is reduced.

[0039] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A lithium ion battery liquid injection equipment, comprising a liquid injection gun (1), a liquid injection channel (11) is arranged in the liquid injection cavity, one end of the liquid injection channel (11) is a liquid inlet (12), the other end of the liquid injection channel (11) is a liquid outlet (13), characterized in that: The liquid outlet (13) is symmetrically provided with a group of baffles (21) away from the liquid inlet (12) side, the opposite surfaces of the baffles (21) are used for abutting each other, the two sides of the baffle (21) are fixedly provided with liquid outlet plates (22), the opposite surfaces of the liquid outlet plates (22) are used for abutting each other, the opposite surfaces of the baffle (21) and the opposite surfaces of the liquid outlet plate (22) are jointly and fixedly provided with side plates (23), the side plates (23) are inclinedly arranged, the top of the side plate (23) and the top of the liquid outlet plate (22) are jointly and fixedly provided with a top plate (24), the opposite surface of the top plate (24) is connected with the liquid injection gun (1), the liquid outlet cavity (2) is formed between the baffle (21), the liquid outlet plate (22), the side plate (23) and the top plate (24), the liquid outlet passage (221) is throughly arranged on the liquid outlet plate (22), and the liquid outlet passage (221) and the liquid outlet cavity (2) are in communication with each other.

2. The lithium-ion battery liquid injection equipment according to claim 1, characterized in that: The opposite surface of the top plate (24) is rotationally connected with the outer wall of the liquid injection gun (1), the opposite surface of the top plate (24) is rotationally provided with a driving arm (33), the end away from the top plate (24) of the driving arm (33) is rotationally provided with a driving block (32), the driving block (32) is jointly provided with a driving sleeve (31), and the driving sleeve (31) is slidingly connected with the outer wall of the liquid injection gun (1).

3. The lithium-ion battery liquid injection equipment according to claim 2, characterized in that: A plurality of guide grooves (4) are arranged on the outer wall of the liquid injection gun (1), and a guide block (41) is slidingly arranged in the guide groove (4).

4. The lithium-ion battery liquid injection equipment according to claim 3, characterized in that: The outer wall of the liquid injection gun (1) is fixedly provided with a driving cylinder (3), and the output shaft of the driving cylinder (3) is fixedly connected with the top of the driving sleeve (31).

5. The lithium-ion battery liquid injection equipment according to claim 2, characterized in that: The driving sleeve (31) is provided with a sealing ring sleeve (51), and the bottom of the sealing ring sleeve (51) is provided with a sealing rubber layer (5).

6. The lithium-ion battery liquid injection equipment according to claim 5, characterized in that: The outer wall of the driving sleeve (31) is provided with an external thread groove (511), the inner wall of the sealing ring sleeve (51) is provided with an internal thread groove (512), and the internal thread groove (512) is threadedly connected with the external thread groove (511).

7. The lithium-ion battery liquid injection equipment according to claim 1, characterized in that: The liquid inlet (12) is communicated with a liquid injection pipe (62), the liquid injection pipe (62) is communicated with a liquid injection pump (61) away from the liquid injection gun (1), and the input end of the liquid injection pump (61) is communicated with a liquid injection tank (6).

8. The lithium-ion battery liquid injection equipment according to claim 7, characterized in that: The bottom of the liquid injection tank (6) is provided with a machine base (72), the machine base (72) is fixedly provided with a machine frame (71), the machine frame (71) is fixedly provided with a lifting cylinder (7), and the output shaft of the lifting cylinder (7) is fixedly connected with the liquid injection gun (1).

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