Liquid injection structure and battery liquid injection mechanism

Abstract

The utility model relates to the technical field of battery liquid injection, in particular to a liquid injection structure and a battery liquid injection mechanism, the battery liquid injection mechanism comprises the liquid injection structure, the liquid injection structure comprises a liquid injection cup and a liquid inlet head communicated with the liquid injection cup, a first liquid injection cavity is formed in the liquid inlet head, and a second liquid injection cavity is formed in the liquid injection cup; the bottom of the first liquid injection cavity is communicated with the second liquid injection cavity, the first liquid injection cavity is provided with a first plug, a liquid injection opening is formed in the bottom of the second liquid injection cavity, and the second liquid injection cavity is provided with a second plug; liquid is communicated with the liquid inlet head and can enter the first liquid injection cavity, when the first plug of the first liquid injection cavity is far away from the end part of the first liquid injection cavity, the liquid can enter the second liquid injection cavity of the liquid injection cup, and after the liquid injection opening is inserted into the battery pack and the second plug is far away from the liquid injection opening, positive pressure is applied to the second liquid injection cavity; liquid in the second liquid injection cavity can enter the battery pack for liquid injection, liquid leakage is prevented, and when liquid injection is not carried out, liquid leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery liquid injection, in particular to a liquid injection structure and a battery liquid injection mechanism. Background Art

[0002] In the production of lithium-ion batteries, liquid injection is a key process. The quality of the treatment of this process directly affects the quality of the entire battery. Currently, the most widely used is the battery bell jar type liquid injection device, which uses static liquid injection in a large-volume sealed bell jar.

[0003] Among them, the utility model with the application number CN202322483931.9 discloses a battery liquid injection device, which includes a turntable, a rotation driving member, a carrier mechanism, a liquid injection mechanism and a liquid adding mechanism; the output end of the rotation driving member is connected to the turntable; the carrier mechanism is installed on the turntable, and the carrier mechanism is used to place the battery; the liquid injection mechanism is connected to the carrier mechanism, and the liquid injection mechanism includes a liquid injection nozzle. There is a liquid injection port on the battery. When the battery is placed on the carrier mechanism, the liquid injection nozzle is docked with the liquid injection port; the liquid adding mechanism is arranged above the liquid injection mechanism, and the liquid adding mechanism is used to add liquid to the liquid injection mechanism. The turntable is driven by the rotation driving member to rotate. When the liquid injection mechanism rotates at a high speed, under the action of centrifugal force, the liquid in the liquid injection mechanism is injected into the battery. The battery liquid injection speed is fast, which greatly improves the battery liquid injection speed, improves production capacity and saves costs.

[0004] During the liquid injection of the existing liquid injection structure, liquid leakage will occur, resulting in liquid dripping on multiple areas of the liquid injection mechanism, which is likely to damage the equipment. Content of the Utility Model

[0005] The purpose of the utility model is to provide a liquid injection structure and a battery liquid injection mechanism in view of the deficiencies of the prior art.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] The liquid injection structure includes a liquid injection cup and a liquid inlet head communicated with the liquid injection cup. The liquid inlet head is formed with a first liquid injection cavity for liquid to pass through. The liquid injection cup is formed with a second liquid injection cavity for transferring liquid. The bottom of the first liquid injection cavity is communicated with the second liquid injection cavity. The first liquid injection cavity is provided with a first plug that can move along the length direction of the first liquid injection cavity. The bottom of the second liquid injection cavity is formed with a liquid injection port. The second liquid injection cavity is provided with a second plug for controlling the liquid to flow out from the liquid injection port. The second plug can approach or move away from the liquid injection port.

[0008] Further: The liquid inlet head is connected with a liquid inlet hole, and the liquid inlet hole is communicated with the first liquid injection cavity; the top of the liquid inlet head is connected with a driving head, and the driving head is installed with a first lifting driving member, and the first lifting driving member is connected with the first plug.

[0009] Further: A guide sleeve through which the top of the first plug passes is installed at the top of the first liquid injection cavity. A driving cavity is formed inside the driving head. The first lifting driving member includes a first lifting head that moves in the length direction of the driving cavity. The bottom of the first lifting head is connected to the first plug, and the first plug can move along the length direction of the first liquid injection cavity.

[0010] Further: A sealing cover is installed at the top of the liquid injection cup. The sealing cover is formed with a liquid injection hole for the liquid inlet head to insert. A sealing ring sleeve nested outside the liquid inlet head is installed in the liquid injection hole.

[0011] Further: The liquid injection cup is provided with a pneumatic system, and the pneumatic system includes an air inlet pipe that communicates with the second liquid injection cavity.

[0012] Further: The sealing cover is formed with a sealing hole for the top of the second plug to extend outwards. The sealing cover is installed with a second lifting head that can move longitudinally, and the second lifting head is connected to the top of the second plug.

[0013] Further: A sealing rubber plug capable of blocking the liquid injection port is installed at the bottom of the second plug, and a liquid injection needle is installed at the liquid injection port.

[0014] The battery liquid injection mechanism includes a liquid injection structure, and also includes a liquid injection plate for installing the liquid injection structure. The number of liquid injection plates is multiple. It also includes a liquid injection driving member for driving the liquid injection plate to move longitudinally. The liquid injection driving member includes a driving plate that moves longitudinally, and the driving plate is respectively connected to multiple liquid injection plates.

[0015] Further: The battery liquid injection mechanism also includes a sealing bottom plate. The sealing bottom plate is formed with a through hole for the liquid injection port to pass through, and a buffer sleeve that contacts the battery in a buffered manner is installed at the bottom of the through hole.

[0016] Further: The liquid injection driving member also includes a fixed seat installed at the top of the sealing bottom plate. A liquid injection lifting cylinder is arranged between the driving plate and the fixed seat. The cylinder body of the liquid injection lifting cylinder is installed on the driving plate, and the piston rod of the liquid injection lifting cylinder is connected to the fixed seat; the driving plate is installed with a transverse bar extending outwards, and a connecting roller is installed at the end of the transverse bar. The liquid injection plate is formed with a connecting long groove for the connecting roller to insert.

[0017] The beneficial effects of the present utility model: The liquid is communicated with the liquid inlet head, and the liquid can enter the first liquid injection cavity. When the first plug of the first liquid injection cavity is away from the end of the first liquid injection cavity, the liquid can enter the second liquid injection cavity of the liquid injection cup. After the liquid injection port is inserted into the battery pack and the second plug is away from the liquid injection port, positive pressure is applied to the second liquid injection cavity, and the liquid in the second liquid injection cavity can enter the battery pack for liquid injection, preventing liquid leakage. When not injecting liquid, the liquid will not leak. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the battery liquid injection mechanism.

[0019] Figure 2 It is a schematic structural diagram of the liquid injection structure cooperating with the liquid injection driving part.

[0020] Figure 3 It is a schematic structural diagram of a single liquid injection structure cooperating with the liquid injection driving part.

[0021] Figure 4 It is an exploded structural diagram of the liquid injection structure.

[0022] Figure 5 It is a schematic sectional view of the liquid injection structure.

[0023] Reference numerals include:

[0024] 1 - Liquid injection structure,

[0025] 10 - Liquid inlet head 11 - First liquid injection cavity, 12 - First plug, 13 - Liquid inlet hole, 14 - Driving head,

[0026] 15 - First lifting driving part, 16 - Guide sleeve, 17 - Driving cavity, 18 - First lifting head,

[0027] 2 - Liquid injection cup,

[0028] 21 - Second liquid injection cavity, 22 - Sealing cover, 23 - Liquid injection hole, 24 - Sealing ring sleeve, 25 - Air inlet pipe,

[0029] 26 - Sealing hole, 27 - Second lifting head, 28 - Second plug, 29 - Liquid injection port,

[0030] 3 - Liquid injection driving part,

[0031] 31 - Driving plate, 32 - Fixed seat, 33 - Liquid injection lifting cylinder, 34 - Sealing bottom plate, 35 - Through hole,

[0032] 36 - Buffer sleeve, 37 - Transverse strip, 38 - Connecting roller, 39 - Connecting long groove,

[0033] 4 - Liquid injection plate,

[0034] 41 - Longitudinal guide rail, 42 - Longitudinal sliding seat, 43 - Annular sleeve, 44 - Driving bracket, 45 - Lifting cylinder, 46 - Sealing rubber plug, 47 - Liquid injection needle. Detailed implementation mode

[0035] The present utility model will be described in detail below with reference to the accompanying drawings.

[0036] Such as Figures 1-5As shown, the liquid injection structure includes a liquid injection cup 2 and a liquid inlet head 10 communicating with the liquid injection cup 2. The liquid inlet head 10 is formed with a first liquid injection cavity 11 for liquid to pass through, and the liquid injection cup 2 is formed with a second liquid injection cavity 21 for transferring the liquid from the liquid inlet head 10. The bottom of the first liquid injection cavity 11 communicates with the second liquid injection cavity 21. A first plug 12 capable of moving along the length direction of the first liquid injection cavity 11 is provided in the first liquid injection cavity 11. A liquid injection port 29 is formed at the bottom of the second liquid injection cavity 21, and a second plug 28 for controlling the liquid to flow out from the liquid injection port 29 is provided in the second liquid injection cavity 21. The second plug 28 can approach or move away from the liquid injection port 29.

[0037] It should be noted that the liquid is electrolyte.

[0038] The liquid communicates with the liquid inlet head 10, and the liquid can enter the first liquid injection cavity 11. When the first plug 12 of the first liquid injection cavity 11 moves away from the end of the first liquid injection cavity 11, the liquid can enter the second liquid injection cavity 21 of the liquid injection cup 2. After the liquid injection port 29 is inserted into the battery pack and the second plug 28 moves away from the liquid injection port 29, positive pressure is applied to the second liquid injection cavity 21, and the liquid in the second liquid injection cavity 21 can enter the battery pack for liquid injection, preventing liquid leakage. When not injecting liquid, the liquid will not leak.

[0039] Furthermore, the liquid inlet head 10 is connected with a liquid inlet hole 13, and the liquid inlet hole 13 communicates with the first liquid injection cavity 11; a driving head 14 is connected to the top of the liquid inlet head 10, and a first lifting driving member 15 is installed on the driving head 14. The lifting driving member is connected with the first plug 12. Driven by the first lifting driving member 15, the first plug 12 can move longitudinally along the length direction of the first liquid injection cavity 11. Since the liquid inlet hole 13 communicates with the liquid inlet head 10, when the first plug 12 moves downward to the end, the first plug 12 will block the first liquid injection cavity 11, and the liquid will not enter the second liquid injection cavity 21, preventing the liquid in the liquid injection cup 2 from overflowing.

[0040] A guide sleeve 16 for guiding the top of the first plug 12 to pass through is installed at the top of the first liquid injection cavity 11. A driving cavity 17 is formed in the driving head 14. The first lifting driving member 15 includes a first lifting head 18 moving in the length direction of the driving cavity 17. The bottom of the first lifting head 18 is connected with the first plug 12, and the first plug 12 can move along the length direction of the first liquid injection cavity 11; the first lifting head 18 moves up and down in the driving cavity 17 of the driving head 14, thereby driving the first plug 12 to move up and down. The guide sleeve 16 can ensure the moving stability of the first plug 12 and the sealing performance during plugging, and there will be no displacement phenomenon.

[0041] Preferably, a lifting cylinder 45 is installed on the driving head 14. Driven by the lifting cylinder 45, the first lifting head 18 can move up and down.

[0042] A sealing cover 22 is installed at the top of the liquid injection cup 2. The sealing cover 22 is formed with a liquid injection hole 23 for inserting the liquid inlet head 10. A sealing ring sleeve 24 nested outside the liquid inlet head 10 is installed in the liquid injection hole 23. The liquid inlet head 10 is inserted into the second liquid injection cavity 21 inside the liquid injection cup 2 through the liquid injection hole 23 for transfer. The use of the sealing ring sleeve 24 can further improve the sealing performance of the liquid injection cup 2 and prevent liquid leakage.

[0043] The liquid injection cup 2 is provided with a pneumatic system. The pneumatic system includes an air inlet pipe 25, and the air inlet pipe 25 is communicated with the second liquid injection cavity 21. The second liquid injection cavity 21 is in a sealed state. When the pneumatic system does not blow air, the liquid in the second liquid injection cavity 21 will not drip from the liquid injection port 29, and the phenomenon of liquid leakage will not occur, effectively protecting the equipment. When the second plug 28 is far away from the liquid injection port 29, the pneumatic system passes gas into the second liquid injection cavity 21 through the air inlet pipe 25. At this time, the second liquid injection cavity 21 is in a positive pressure state, and the liquid located in the second liquid injection cavity 21 will be ejected from the liquid injection port 29 to realize the liquid injection process.

[0044] Furthermore, the sealing cover 22 is formed with a sealing hole 26 for the top of the second plug 28 to extend outwards. The sealing cover 22 is installed with a second lifting head 27 that can move longitudinally. The second lifting head 27 is connected to the top of the second plug 28. When the second lifting head 27 moves longitudinally, the second plug 28 can move up and down simultaneously, away from or close to the liquid injection port 29. When the second plug 28 is far away from the liquid injection port 29, the liquid in the liquid injection cup 2 can be discharged for liquid injection, ensuring the stability of liquid injection.

[0045] Preferably, a driving bracket 44 is installed at the top of the sealing cover 22. A longitudinal lifting cylinder 45 is installed on the driving bracket 44. The driving end of the longitudinal lifting cylinder 45 is connected to the second lifting head 27. Driven by the longitudinal lifting cylinder 45, the second lifting head 27 can move up and down.

[0046] Furthermore, a sealing rubber plug 46 capable of blocking the liquid injection port 29 is installed at the bottom of the second plug 28. When the second plug 28 seals, the sealing rubber plug 46 will contact the annular wall cavity inside the liquid injection port 29 to prevent liquid leakage, improving the sealing performance during sealing. A liquid injection needle 47 is installed at the liquid injection port 29. During liquid injection, the liquid injection needle 47 is inserted into the battery pack. When the second plug 28 is far away from the liquid injection port 29, the liquid in the liquid injection cup 2 can be discharged for liquid injection, and the battery pack is injected with liquid through the liquid injection needle 47.

[0047] Battery liquid injection mechanism, including a liquid injection structure 1, further includes a liquid injection plate 4 for installing the liquid injection structure 1, the number of the liquid injection plates 4 is multiple, and further includes a liquid injection driving member 3 for driving the longitudinal movement of the liquid injection plate 4. The liquid injection driving member 3 includes a driving plate 31 moving longitudinally, and the driving plate 31 is respectively connected to multiple liquid injection plates 4. During liquid injection, the liquid injection driving member 3 drives the driving plate 31 to move longitudinally, so that the liquid injection structure 1 installed on the liquid injection plate 4 can approach the liquid injection fixture, and the liquid injection port 29 can be inserted into the battery pack, and multiple liquid injection ports 29 inject liquid into multiple battery packs simultaneously, greatly improving the liquid injection efficiency.

[0048] Furthermore, the battery liquid injection mechanism further includes a sealing bottom plate 34. A sealed cavity will be formed at the bottom of the sealing bottom plate 34, and a sealing structure is formed at the bottom of the sealing bottom plate 34. A buffer sleeve 36 in buffer contact with the battery bag is installed at the bottom through a hole 35. The sealing bottom plate 34 is formed with a through hole 35 for the liquid injection port 29 to pass through. During liquid injection, the cavity formed at the bottom of the sealing bottom plate 34 is evacuated, and the liquid injection needle 47 installed at the liquid injection port 29 can pass through the through hole 35. When the through hole 35 at the bottom of the sealing bottom plate 34 contacts the battery pack, the buffer sleeve 36 has a soft contact, so that the liquid injection port 29 has a seal when contacting the battery pack, reducing the probability of liquid leakage.

[0049] Preferably, the buffer sleeve 36 is processed and formed from silica gel material.

[0050] Furthermore, the liquid injection driving member 3 further includes a fixed seat 32 installed on the top of the sealing bottom plate 34. An elevating cylinder 45 (liquid injection elevating cylinder 4533) is arranged between the driving plate 31 and the fixed seat 32. The cylinder body of the elevating cylinder 45 (liquid injection elevating cylinder 4533) is installed on the driving plate 31, and the piston rod of the elevating cylinder 45 (liquid injection elevating cylinder 4533) is connected to the fixed seat 32. The driving plate 31 is installed with a transverse bar 37 extending outwards, and a connecting roller 38 is installed at the end of the transverse bar 37. The liquid injection plate 4 is formed with a connecting long groove 39 for the connecting roller 38 to insert. The driving plate 31 is connected to the connecting long groove 39 of the liquid injection plate 4 through the connecting roller 38 of the transverse bar 37. When the elevating cylinder 45 (liquid injection elevating cylinder 4533) makes a lifting movement, the liquid injection plate 4 can move longitudinally, so that the liquid injection needle 47 installed at the liquid injection port 29 will pass through the through hole 35 and cooperate with the battery pack.

[0051] Preferably, the fixed seat 32 is longitudinally provided with a longitudinal guide rail 41, and a longitudinal sliding seat 42 is slidably installed on the longitudinal guide rail 41. The liquid injection plate 4 is connected to the longitudinal sliding seat 42. When the liquid injection plate 4 moves longitudinally, it can move along the guidance of the longitudinal guide rail 41.

[0052] Preferably, the liquid injection plate 4 is installed with an annular sleeve 43 nested in the liquid injection cup 2, and the annular sleeve 43 fixes the liquid injection cup 2.

[0053] As described above, it can be seen that the present utility model has the excellent characteristics described above, enabling it to enhance the efficiency that has never been seen in the prior art during use and thus having practicality, becoming a product with extremely high practical value.

[0054] The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, based on the idea of the present utility model, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. Liquid injection structure, including a liquid injection cup and a liquid inlet head communicated with the liquid injection cup, characterized in that: The liquid inlet head is formed with a first liquid injection cavity for liquid to pass through, and the liquid injection cup is formed with a second liquid injection cavity for transferring liquid. The bottom of the first liquid injection cavity is communicated with the second liquid injection cavity. The first liquid injection cavity is provided with a first plug that can move along the length direction of the first liquid injection cavity. The bottom of the second liquid injection cavity is formed with a liquid injection port, and the second liquid injection cavity is provided with a second plug for controlling the liquid to flow out from the liquid injection port. The second plug can approach or move away from the liquid injection port.

2. The liquid injection structure according to claim 1, wherein: The liquid inlet head is connected with a liquid inlet hole, and the liquid inlet hole is communicated with the first liquid injection cavity; the top of the liquid inlet head is connected with a driving head, and the driving head is installed with a first lifting driving member, and the first lifting driving member is connected with the first plug.

3. The liquid injection structure according to claim 2, wherein: A guide sleeve for guiding the top of the first plug to pass through is installed at the top of the first liquid injection cavity. A driving cavity is formed in the driving head. The first lifting driving member includes a first lifting head that moves in the length direction of the driving cavity. The bottom of the first lifting head is connected with the first plug, and the first plug can move along the length direction of the first liquid injection cavity.

4. The liquid injection structure according to claim 3, wherein: A sealing cover is installed at the top of the liquid injection cup. The sealing cover is formed with a liquid injection hole for the liquid inlet head to be inserted. The liquid injection hole is installed with a sealing ring sleeve nested outside the liquid inlet head.

5. The liquid injection structure according to claim 1, wherein: The liquid injection cup is provided with a pneumatic system, and the pneumatic system includes an air inlet pipe, and the air inlet pipe is communicated with the second liquid injection cavity.

6. The liquid injection structure according to claim 4, wherein: The sealing cover is formed with a sealing hole for the top of the second plug to extend outwards. The sealing cover is installed with a second lifting head that can move longitudinally, and the second lifting head is connected with the top of the second plug.

7. The liquid injection structure according to claim 1, wherein: A sealing rubber plug capable of blocking the liquid injection port is installed at the bottom of the second plug, and a liquid injection needle is installed at the liquid injection port.

8. Battery liquid injection mechanism, including the liquid injection structure according to any one of claims 1 to 7, further including a liquid injection plate for installing the liquid injection structure, characterized in that: The number of the liquid injection plates is multiple, and it further includes a liquid injection driving member for driving the liquid injection plates to move longitudinally. The liquid injection driving member includes a driving plate that moves longitudinally, and the driving plate is respectively connected with the multiple liquid injection plates.

9. The battery liquid injection mechanism according to claim 8, characterized in that: The battery liquid injection mechanism further includes a sealing bottom plate, and the sealing bottom plate is formed with a through hole for the liquid injection port to pass through. A buffer sleeve that is in buffer contact with the battery is installed at the bottom of the through hole.

10. The battery liquid injection mechanism according to claim 9, wherein: The liquid injection driving member further includes a fixed seat installed at the top of the sealing bottom plate. A liquid injection lifting cylinder is arranged between the driving plate and the fixed seat. The cylinder body of the liquid injection lifting cylinder is installed on the driving plate, and the piston rod of the liquid injection lifting cylinder is connected with the fixed seat; the driving plate is installed with a transverse bar extending outwards, and a connecting roller is installed at the end of the transverse bar. The liquid injection plate is formed with a connecting long groove for the connecting roller to be inserted into.

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