Battery liquid injection device

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a battery liquid injection device. The battery liquid injection device comprises a liquid injection sleeve cup, a tray, a jacking mechanism and a plurality of clamping jaw mechanisms, the liquid injection retainer cup is fixedly arranged; the tray is used for placing batteries; the jacking mechanism is connected with the tray and used for jacking the tray to a set position, so that a liquid injection cavity is formed by the tray and the liquid injection retainer cup; the multiple clamping jaw mechanisms are arranged along the outer edge of the liquid injection sleeve cup at intervals, connected with the liquid injection sleeve cup and used for clamping the tray located at the set position or releasing clamping of the tray. The problems that in the prior art, sealing of a liquid injection cavity is kept between a tray and a liquid injection sleeve cup only through a jacking mechanism, instability exists, and safety risks are possibly caused can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery manufacturing technical field, concretely relates to a battery liquid injection device. BACKGROUND

[0002] With the further cost reduction and efficiency improvement activities of battery industry development, the stability of equipment in the battery manufacturing process is the key to the battery, which can further improve the quality of the battery and the corresponding cost reduction and efficiency improvement.

[0003] In the existing battery liquid injection device, the lifting mechanism is used to lift the tray with the battery to the liquid injection sleeve cup to form a liquid injection cavity, and then the battery in the liquid injection cavity is subjected to a pressure injection process.

[0004] However, in the pressure injection process, the pressure in the battery liquid injection cavity will change with different steps, and the lifting mechanism will maintain the sealing of the liquid injection cavity between the tray and the liquid injection sleeve cup, which will be unstable and may cause safety risks. UTILITY MODEL CONTENTS

[0005] In view of the defects in the prior art, the utility model aims to provide a battery liquid injection device, which can solve the problem of instability and safety risk caused by the sealing of the liquid injection cavity between the tray and the liquid injection sleeve cup only relying on the lifting mechanism in the prior art.

[0006] To achieve the above purpose, the utility model adopts the technical scheme of:

[0007] The utility model provides a battery liquid injection device, characterized by comprising:

[0008] A liquid injection sleeve cup is fixedly arranged;

[0009] A tray is used to place the battery;

[0010] A lifting mechanism is connected with the tray and is used to lift the tray to a set position to form a liquid injection cavity between the tray and the liquid injection sleeve cup;

[0011] A plurality of clamping jaw mechanisms are arranged along the outer edge of the liquid injection sleeve cup and are connected with the liquid injection sleeve cup, and are used to clamp the tray at the set position or release the clamping of the tray.

[0012] In some optional schemes, the clamping jaw mechanism comprises:

[0013] A clamping jaw is rotatably connected with the liquid injection sleeve cup at one end;

[0014] A driving assembly is used to drive the rotation of the clamping jaw to clamp the tray at the set position or release the clamping of the tray.

[0015] In some alternatives, the driving assembly comprises:

[0016] Two groups of spacing limiting members, which are arranged outside the clamping jaws;

[0017] A roller, which is arranged between the two groups of limiting members;

[0018] A driving cylinder, which is arranged on the liquid injection sleeve cup, and the driving end of the driving cylinder is connected with the roller, and the driving end is driven to stretch or retract to drive the roller to move and thus drive the clamping jaws to rotate.

[0019] In some alternatives, the driving assembly further comprises a support plate and a connecting frame, the support plate is arranged above the liquid injection sleeve cup and extends beyond the outer edge of the liquid injection sleeve cup, the driving cylinder is arranged on the extended part of the support plate and is rotationally connected with the roller through the connecting frame.

[0020] In some alternatives, the clamping jaws comprise a connecting member and a clamping block, one end of the connecting member is rotationally connected with the liquid injection sleeve cup, and the clamping block is arranged at the other end of the connecting member and is used for clamping the lower side of the tray.

[0021] In some alternatives, a sensor is arranged outside the liquid injection sleeve cup and is used for detecting the relative position between the tray and the liquid injection sleeve cup.

[0022] In some alternatives, the sensor is a diffuse reflection sensor.

[0023] In some alternatives, the jacking mechanism comprises:

[0024] A jacking cylinder;

[0025] A force bearing plate, which is arranged at the end of the telescopic rod of the jacking cylinder;

[0026] A transition plate, which is provided with a through hole for the telescopic rod to pass through, the area of the transition plate is larger than that of the force bearing plate, the transition plate is connected with the force bearing plate through a plurality of first connecting rods and is connected with the tray through a plurality of second connecting rods.

[0027] In some alternatives, the battery liquid injection device further comprises a bearing plate, which is fixedly arranged and connected with the liquid injection sleeve cup through a plurality of third connecting rods and is provided with a through hole for the second connecting rod to pass through;

[0028] The jacking cylinder is connected with the bearing plate through a plurality of fourth connecting rods, and the transition plate is provided with a through hole for the fourth connecting rod to pass through.

[0029] In some alternatives, the spacing between the bearing plate and the force plate is the same as the spacing between the tray and the set position.

[0030] Compared with the prior art, the battery liquid injection device has the advantages that: the clamping jaw mechanism clamps the tray at the set position, and cooperates with the jacking mechanism to limit the relative position between the tray and the liquid injection sleeve cup, thereby maintaining the sealing of the liquid injection cavity formed between the tray and the liquid injection sleeve cup, improving the stability of the negative pressure extraction and pressurized liquid injection process in the liquid injection cavity, and reducing the safety risk.

[0031] The clamping jaw mechanism is arranged along the outer edge of the liquid injection sleeve cup and connected with the liquid injection sleeve cup, and compared with the clamping jaw mechanism arranged on the tray, the tray is clamped on the liquid injection sleeve cup after the tray is located at the set position, the structure of the tray is simpler, and the tray is not provided with the clamping jaw mechanism on the outer side, so that the battery is conveniently placed on the tray and conveniently removed from the tray. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 It is a front view structural schematic diagram of the battery liquid injection device in the embodiment of the present application.

[0034] Figure 2 It is a front view structural schematic diagram of the battery liquid injection device in the embodiment of the present application.

[0035] Figure 3 It is a front view structural schematic diagram of the battery liquid injection device in the embodiment of the present application.

[0036] Figure 4 It is a front view structural schematic diagram of the battery liquid injection device in the embodiment of the present application.

[0037] Figure 5 It is a front view structural schematic diagram of the battery liquid injection device in the embodiment of the present application.

[0038] Figure 6 It is a front view structural schematic diagram of the battery liquid injection device in the embodiment of the present application.

[0039] In the diagram: 1. Injection cup; 11. Support plate; 12. Third connecting rod; 2. Tray; 3. Battery; 4. Lifting mechanism; 41. Lifting cylinder; 42. Support plate; 43. Transition plate; 44. First connecting rod; 45. Second connecting rod; 46. Fourth connecting rod; 5. Gripper mechanism; 51. Gripper; 511. Connector; 512. Holding block; 52. Drive assembly; 521. Limiting component; 522. Roller; 523. Drive cylinder; 524. Support plate; 525. Connecting frame; 6. Sensor. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0042] like Figures 1 to 4 As shown, this utility model provides a battery liquid injection device, including: a liquid injection cup 1, a tray 2, a lifting mechanism 4, and multiple gripper mechanisms 5; the liquid injection cup 1 is fixedly installed; the tray 2 is used to place the battery 3; the lifting mechanism 4 is connected to the tray 2 and is used to lift the tray 2 to a set position so that the tray 2 and the liquid injection cup 1 form a liquid injection cavity; the multiple gripper mechanisms 5 are spaced along the outer edge of the liquid injection cup 1 and are connected to the liquid injection cup 1, and are used to hold the tray 2 at the set position or release the holding of the tray 2.

[0043] In this scheme, during the battery electrolyte filling process, the battery 3 is placed on the tray 2, and the lifting mechanism 4 lifts the tray 2 to a set position, forming an electrolyte filling cavity with the electrolyte filling cup 1. Multiple gripper mechanisms 5, spaced along the outer edge of the electrolyte filling cup 1 and connected to it, hold the tray 2 in the set position. After the process of drawing negative pressure and pressurizing the electrolyte filling within the cavity, the gripper mechanisms 5 release the gripper mechanism 5. By holding the tray 2 in the set position with the gripper mechanism 5, together with the lifting mechanism 4, the relative position between the tray 2 and the electrolyte filling cup 1 is limited, maintaining the airtightness of the electrolyte filling cavity formed between the tray 2 and the electrolyte filling cup 1. Compared to relying solely on the lifting mechanism 4 to limit the relative position between the tray 2 and the electrolyte filling cup 1, this improves the stability of the process of drawing negative pressure and pressurizing the electrolyte filling within the cavity and reduces safety risks.

[0044] In addition, the clamping jaw mechanism 5 is arranged at intervals along the outer edge of the liquid injection sleeve cup 1 and is connected with the liquid injection sleeve cup 1, and is used for clamping the tray 2 located at the set position. Compared with the structure that the clamping jaw mechanism 5 is arranged on the tray 2 and the tray 2 is clamped on the liquid injection sleeve cup 1 after the tray 2 is located at the set position, the structure of the tray 2 is simpler, and the clamping jaw mechanism 5 is not arranged on the outer side of the tray 2, so that the battery 3 is conveniently placed on the tray 2 and the battery 3 is conveniently transported away from the tray.

[0045] In the example, the tray 2 and the liquid injection sleeve cup 1 are both rectangular, and two clamping jaw mechanisms 5 are arranged on each side of the liquid injection sleeve cup 1, so as to ensure the stability of the clamping jaw mechanism 5 clamping the tray 2 located at the set position.

[0046] As shown in FIGS. 1, 2 and 3, in some optional embodiments, the clamping jaw mechanism 5 comprises a clamping jaw 51 and a driving assembly 52. One end of the clamping jaw 51 is rotationally connected with the liquid injection sleeve cup 1. The driving assembly 52 is used for driving the clamping jaw 51 to rotate, so as to clamp or release the tray 2 located at the set position. Figure 5 Figure 6 As shown in FIGS. 1, 2 and 3, in some optional embodiments, the clamping jaw mechanism 5 comprises a clamping jaw 51 and a driving assembly 52. One end of the clamping jaw 51 is rotationally connected with the liquid injection sleeve cup 1. The driving assembly 52 is used for driving the clamping jaw 51 to rotate, so as to clamp or release the tray 2 located at the set position.

[0047] In the example, one end of the clamping jaw 51 is rotationally connected with the liquid injection sleeve cup 1, and the driving assembly 52 drives the clamping jaw 51 to rotate, so as to clamp or release the tray 2 located at the set position. The structure is simple and stable.

[0048] Of course, in other embodiments, a clamping jaw can also be arranged at the outer edge of the liquid injection sleeve cup 1 and is fixed relative to the liquid injection sleeve cup 1. A retractable clamping piece is arranged at the lower end of the clamping jaw. The clamping piece is located below the tray 2 by driving the clamping piece to extend, so as to clamp the tray 2 located at the set position. Or the clamping piece is retracted by driving, so as to release the tray 2.

[0049] Preferably, the driving assembly 52 comprises a roller 522, a driving cylinder 523 and two groups of interval arranged limiting pieces 521. The limiting pieces 521 are arranged on the outer side of the clamping jaw 51. The roller 522 is arranged between the two groups of limiting pieces 521. The driving cylinder 523 is arranged on the liquid injection sleeve cup 1. The driving end of the driving cylinder 523 is connected with the roller 522. The roller 522 is driven to move by the extension and retraction of the driving end, so as to drive the clamping jaw 51 to rotate.

[0050] In the example, the two groups of interval arranged limiting pieces 521 are arranged on the outer side of the clamping jaw 51 and are located close to the rotationally connected end of the clamping jaw 51 and the liquid injection sleeve cup 1. The roller 522 is arranged between the two groups of limiting pieces 521. The driving end of the driving cylinder 523 is connected with the roller 522.

[0051] ​When the driving end of the driving cylinder 523 extends to drive the roller 522 to move, the roller 522 is pressed against the limiting member 521 close to the rotating connection end of the clamping jaw 51 and the liquid injection sleeve cup 1. Since one end of the clamping jaw 51 is connected to the liquid injection sleeve cup 1 in a rotatable manner, the clamping jaw 51 can rotate around the rotating connection end, so as to open the clamping jaw 51 and release the clamping jaw 51 from clamping the tray 2.

[0052] When the driving end of the driving cylinder 523 extends to drive the roller 522 to move, the roller 522 is pressed against the limiting member 521 close to the rotating connection end of the clamping jaw 51 and the liquid injection sleeve cup 1. Since one end of the clamping jaw 51 is connected to the liquid injection sleeve cup 1 in a rotatable manner, the clamping jaw 51 can rotate around the rotating connection end, so as to open the clamping jaw 51 and release the clamping jaw 51 from clamping the tray 2.

[0053] In other embodiments, the driving end of the driving cylinder 523 can be directly connected to the outer side of the clamping jaw 51, and the driving end of the driving cylinder 523 can directly drive the clamping jaw 51 to rotate around the rotating connection end, so as to clamp or contact clamp the tray 2.

[0054] Preferably, the driving assembly 52 further comprises a support plate 524 and a connecting frame 525. The support plate 524 is arranged above the liquid injection sleeve cup 1 and extends beyond the outer edge of the liquid injection sleeve cup 1. The driving cylinder 523 is arranged on the extended part of the support plate 524 and is connected to the roller 522 through the connecting frame 525.

[0055] In this embodiment, the support plate 524 is arranged above the liquid injection sleeve cup 1 and extends beyond the outer edge of the liquid injection sleeve cup 1, and is used to mount the driving cylinder 523. The driving cylinder 523 drives the roller 522 to move through extension and retraction. In other embodiments, the driving cylinder 523 can be arranged at other positions, as long as it can drive the clamping jaw 51 to rotate through the extension and retraction of the driving end, so as to clamp or contact clamp the tray 2.

[0056] In this embodiment, the part of the support plate 524 extending beyond the outer edge of the liquid injection sleeve cup 1 is provided with a notch, and the driving cylinder 523 is mounted in the notch and its driving end extends from the notch. The limiting member 521 is a plate-shaped member, and the connecting frame 525 comprises two vertically arranged connecting plates which are arranged at two sides of the limiting member 521. One end of each connecting plate is connected to the roller 522 in a rotatable manner, and the other end is connected to a horizontal connecting plate. The horizontal connecting plate is connected to the driving end of the driving cylinder 523. The limiting member 521 is a plate-shaped member, and the two vertically arranged connecting plates are arranged at two sides of the limiting member 521. The roller 522 is limited between the two groups of limiting members 521 and connecting plates of the connecting frame 525, which can ensure the stability of the driving clamping jaw 51 when it rotates.

[0057] Preferably, the clamping jaw 51 comprises a connecting piece 511 and a clamping block 512, one end of the connecting piece 511 is rotatably connected with the liquid injection sleeve cup 1, and the clamping block 512 is arranged at the other end of the connecting piece 511 and used for clamping the lower side of the tray 2.

[0058] In the embodiment, a hinge seat is arranged above the support plate 524, the connecting piece 511 is rotatably connected with the hinge seat through the gap of the support plate 524, and the other end is provided with the clamping block 512. When the clamping jaw 51 clamps the tray 2, the clamping block 512 clamps the lower side of the tray 2, which is simple and reliable in structure and convenient to install.

[0059] As shown in Figure 1 and Figure 2 Preferably, a sensor 6 is arranged outside the liquid injection sleeve cup 1 and used for detecting the relative position of the tray 2 and the liquid injection sleeve cup 1.

[0060] In actual production process, the tray 2 is adsorbed on the liquid injection sleeve cup 1 in negative pressure state. After the clamping jaw mechanism 5 is loosened, if the telescopic end of the jacking mechanism 4 directly descends to the original position, there is a certain risk coefficient, which needs manual timely intervention and alarm. The sensor 6 is arranged outside the liquid injection sleeve cup 1 and used for detecting the relative position of the tray 2 and the liquid injection sleeve cup 1, that is, detecting whether the tray 2 is separated from the liquid injection sleeve cup 1, identifying the existence of the hanging tray, and controlling the telescopic stroke of the jacking mechanism 4 through the identification condition, so as to reduce the risk.

[0061] In the example, the sensor 6 is a diffuse reflection sensor, and the sensor 6 is installed through a sensor installation sheet metal arranged outside the liquid injection sleeve cup 1. The sensor installation sheet metal partially extends from the lower end of the liquid injection sleeve cup 1, and the sensor 6 is arranged on the part of the sensor installation sheet metal extending from the liquid injection sleeve cup 1.

[0062] As shown in Figure 1 and Figure 2 Preferably, the jacking mechanism 4 comprises a jacking cylinder 41, a bearing plate 42 and a transition plate 43. The bearing plate 42 is arranged at the telescopic rod end of the jacking cylinder 41. The transition plate 43 is provided with a through hole for the telescopic rod to pass through, the area of the transition plate 43 is larger than that of the bearing plate 42, and the transition plate 43 is connected with the bearing plate 42 through a plurality of first connecting rods 44 and connected with the tray 2 through a plurality of second connecting rods 45.

[0063] In this example, the force bearing plate 42 is arranged at the telescopic rod end of the jacking cylinder 41, the transition plate 43 with a larger connection area than the force bearing plate 42 is connected by a plurality of first connecting rods 44, and the tray 2 is connected by a plurality of second connecting rods 45. When the jacking cylinder 41 telescopes, the force bearing plate 42 is lifted, the force bearing plate 42 lifts the transition plate 43 through the first connecting rod 44, and the transition plate 43 lifts the tray 2 through the second connecting rod 45. In this way, the transition plate 43 is balanced by the plurality of first connecting rods 44, and the tray 2 is balanced by the plurality of second connecting rods 45. Compared with directly lifting the tray 2 by the telescoping of the jacking cylinder 41, the stability of the tray 2 during lifting can be improved. In addition, the transition plate 43 is provided with a through hole for the telescopic rod to pass through, which limits the telescopic rod and makes the transition plate 43 more stable during lifting.

[0064] In this example, the force bearing plate 42 and the transition plate 43 are both rectangular plates, and the first connecting rod 44 is 4, which is arranged at the four corners of the force bearing plate 42 to improve the stability of the transition plate 43 during lifting. The second connecting rod 45 is also 4, which is arranged at the four corners of the transition plate 43 to improve the stability of the tray 2 during lifting.

[0065] Preferably, the battery liquid injection device further comprises a bearing plate 11, which is fixedly arranged and connected to the liquid injection sleeve cup 1 by a plurality of third connecting rods 12, and is provided with a through hole for the second connecting rod 45 to pass through.

[0066] In this example, the bearing plate 11 is connected to the liquid injection sleeve cup 1 by a plurality of third connecting rods 12, and is provided with a through hole for the second connecting rod 45 to pass through, which limits the second connecting rod 45 and improves the stability of the transition plate 43 during lifting. In addition, the bearing plate 11 is also rectangular, and the third connecting rod 12 is also 4, which is arranged at the four corners of the bearing plate 11.

[0067] Preferably, the jacking cylinder 41 is connected to the bearing plate 11 by a plurality of fourth connecting rods 46, and the transition plate 43 is provided with a through hole for the fourth connecting rod 46 to pass through.

[0068] In this example, the bearing plate 11 is connected to the liquid injection sleeve cup 1 by a plurality of third connecting rods 12, and is provided with a through hole for the second connecting rod 45 to pass through, which limits the second connecting rod 45 and improves the stability of the transition plate 43 during lifting. In addition, the bearing plate 11 is also rectangular, and the third connecting rod 12 is also 4, which is arranged at the four corners of the bearing plate 11.

[0069] In this example, the bottom of the jacking cylinder 41 is provided with a bottom plate, which is also rectangular, and the fourth connecting rod 46 is 4, which is arranged at the four corners of the bottom plate.

[0070] Preferably, the distance between the bearing plate 11 and the force plate 42 is the same as the distance between the tray 2 and the set position.

[0071] In this embodiment, the set position is the position where the tray 2 is lifted to be coupled with the liquid injection sleeve 1 to form a liquid injection cavity, and the distance between the bearing plate 11 and the force plate 42 is designed to be the same as the distance between the tray 2 and the set position. When the tray 2 is lifted to the set position, the force plate 42 can abut against the bottom of the bearing plate 11, so as to avoid the overstroke of the jacking cylinder 41 and the over-lifting of the tray 2.

[0072] In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0074] The above description is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A battery liquid injection device, characterized by comprising: The application relates to a battery liquid injection device. The device comprises: a liquid injection sleeve (1) fixedly arranged; a tray (2) for placing a battery (3); a lifting mechanism (4) connected with the tray (2) and used for lifting the tray (2) to a set position so that the tray (2) and the liquid injection sleeve (1) form a liquid injection cavity; 2. The battery liquid injecting apparatus according to claim 1, wherein a plurality of clamping jaw mechanisms (5) arranged along the outer edge of the liquid injection sleeve (1) and connected with the liquid injection sleeve (1) and used for clamping or releasing the tray (2) in the set position. The clamping jaw mechanism (5) comprises: a clamping jaw (51) rotatably connected with the liquid injection sleeve (1) at one end; 3. The battery liquid injecting apparatus according to claim 2, wherein a driving assembly (52) used for driving the clamping jaw (51) to rotate so that the other end of the clamping jaw (51) clamps or releases the tray (2) in the set position. The driving assembly (52) comprises: two groups of limiting members (521) arranged at intervals and arranged on the outer side of the clamping jaw (51); a roller (522) arranged between the two groups of limiting members (521); 4. The battery liquid injecting apparatus according to claim 3, wherein a driving cylinder (523) arranged on the liquid injection sleeve (1), wherein the driving end of the driving cylinder (523) is connected with the roller (522), and the driving end is used for driving the roller (522) to move so as to drive the clamping jaw (51) to rotate.

5. The battery liquid injecting apparatus according to claim 2, wherein The driving assembly (52) further comprises a support plate (524) and a connecting frame (525), wherein the support plate (524) is arranged above the liquid injection sleeve (1) and extends beyond the outer edge of the liquid injection sleeve (1), the driving cylinder (523) is arranged on the extended part of the support plate (524) and is rotatably connected with the roller (522) through the connecting frame (525).

6. The battery liquid injecting apparatus according to claim 1, wherein The clamping jaw (51) comprises a connecting member (511) rotatably connected with the liquid injection sleeve (1) at one end and a clamping block (512) arranged at the other end of the connecting member (511) and used for clamping the lower side of the tray (2).

7. The battery liquid injecting apparatus according to claim 6, wherein A sensor (6) is arranged on the outer side of the liquid injection sleeve (1) and used for detecting the relative position of the tray (2) and the liquid injection sleeve (1).

8. The battery liquid injecting apparatus according to claim 1, wherein The sensor (6) is a diffuse reflection sensor. The lifting mechanism (4) comprises: a lifting cylinder (41); a bearing plate (42) arranged at the end of the telescopic rod of the lifting cylinder (41); 9. The battery liquid injecting apparatus according to claim 8, wherein a transition plate (43) with a through hole for the telescopic rod, wherein the area of the transition plate (43) is larger than that of the bearing plate (42), the transition plate (43) is connected with the bearing plate (42) through a plurality of first connecting rods (44) and is connected with the tray (2) through a plurality of second connecting rods (45). The device further comprises a bearing plate (11) fixedly arranged, connected with the liquid injection sleeve (1) through a plurality of third connecting rods (12) and provided with a through hole for the second connecting rod (45). The jacking cylinder (41) is connected with the bearing plate (11) through a plurality of fourth connecting rods (46), and the transition plate (43) is provided with through holes for the fourth connecting rods (46) to pass through.

10. The battery liquid injecting apparatus according to claim 9, wherein The distance between the bearing plate (11) and the force bearing plate (42) is the same as the distance between the tray (2) and the set position.

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