CN211605274U - Battery liquid injection device - Google Patents

Abstract

The utility model relates to a battery priming device, including frame, notes liquid mechanism, battery bearing mechanism and climbing mechanism. Before liquid injection, the battery receiving shell to be injected with liquid can be placed in the battery bearing mechanism at the feeding station. And then, the jacking mechanism drives the battery bearing mechanism provided with the battery shell to move to the liquid injection station until the battery shell in the battery bearing mechanism is in butt joint with the liquid injection nozzle, so that liquid injection is completed. And finally, the jacking mechanism drives the battery bearing mechanism to reset so as to take out the battery shell which is filled with the liquid. When the battery liquid injection device is used for injecting liquid into the battery shells, the plurality of battery shells only need to be transferred in the loading and taking processes, and the liquid injection process is completed in the battery bearing mechanism all the time. Therefore, the carrying action of the battery is reduced, and the liquid injection operation of the battery is more convenient.

Description

Battery liquid injection device

Technical Field

The utility model relates to a battery processing technology field, in particular to battery priming device.

Background

In the process of processing the lithium battery, the most critical step is to inject electrolyte into the battery shell. At present, a common method is that a manipulator is adopted to place a single battery or a pair of batteries on a high-precision clamp, then the clamp is conveyed to a liquid injection station, after liquid injection is completed, the battery clamp is moved out of a liquid injection level, and the manipulator takes out the batteries from the clamp.

The common liquid injection method needs a manipulator to complete the charging, discharging and transferring of the battery in a matching way, and the carrying action is more, so that the battery has the risk of falling in the liquid injection process. Moreover, the requirement on positioning precision is higher due to repeated transportation, and debugging and calibration procedures are complicated. Therefore, the current common battery liquid injection operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a battery liquid filling device which is convenient for filling liquid into a battery, aiming at the problem that the existing battery liquid filling operation is inconvenient.

A battery electrolyte injection device comprising:

the machine frame is provided with a feeding station and a liquid injection station which are oppositely arranged;

the liquid injection mechanism comprises a liquid injection nozzle, and the liquid injection nozzle is mounted on the liquid injection station and points to the feeding station;

the battery bearing mechanism is used for accommodating the battery shell; and

and the jacking mechanism is in transmission connection with the battery bearing mechanism and can drive the battery bearing mechanism to lift between the loading station and the liquid injection station until the battery shell is in butt joint with or separated from the liquid injection nozzle.

In one embodiment, the battery charging device further comprises a connecting plate mounted on the frame, the connecting plate is slidable along a first direction perpendicular to a connecting line between the charging station and the liquid injection station, and the battery bearing mechanism and the jacking mechanism are mounted on the connecting plate.

In one embodiment, the liquid injection nozzles are arranged in parallel along a second direction, and the second direction is perpendicular to connecting lines among the first direction, the loading station and the liquid injection station.

In one embodiment, the jacking mechanism comprises a jacking driving part and a guide shaft, the battery bearing mechanism is located on one side, facing the liquid injection station, of the connecting plate, the jacking driving part is fixed on one side, facing away from the liquid injection station, of the connecting plate, the guide shaft is slidably arranged through the connecting plate, one end of the guide shaft is fixedly connected with the driving end of the jacking driving part, and the other end of the guide shaft is fixedly connected with the battery bearing mechanism.

In one embodiment, the jacking mechanism further comprises a push plate, the push plate is fixedly connected with the driving end of the jacking driving piece, the guide shafts are distributed along the circumferential direction of the jacking driving piece, and the guide shafts are fixed on the push plate.

In one embodiment, the connecting plate is embedded with a linear bearing, and the guide shaft is arranged in the linear bearing in a penetrating manner.

In one embodiment, the liquid filling device further comprises a righting mechanism mounted on the machine frame, the righting mechanism is provided with a clamping groove with an opening facing the feeding station, and the liquid filling nozzle is located in the clamping groove.

In one embodiment, the righting mechanism comprises two oppositely arranged limiting plates with adjustable distance, and the clamping groove is formed between the two limiting plates.

In one embodiment, the liquid injection nozzles are arranged in parallel, and the distance between the liquid injection nozzles is adjustable.

In one embodiment, the liquid injection mechanism further comprises a clamping plate detachably mounted on the rack, a plurality of protrusions arranged at intervals are formed on the edge of the clamping plate along the length direction, the liquid injection nozzles are slidably mounted on the liquid injection station, and a clamping groove clamped with the protrusions is formed in the side surface of each liquid injection nozzle.

Before liquid is injected, the battery liquid injection device can place a battery receiving shell to be injected into a battery bearing mechanism at a feeding station. And then, the jacking mechanism drives the battery bearing mechanism provided with the battery shell to move to the liquid injection station until the battery shell in the battery bearing mechanism is in butt joint with the liquid injection nozzle, so that liquid injection is completed. And finally, the jacking mechanism drives the battery bearing mechanism to reset so as to take out the battery shell which is filled with the liquid. When the battery liquid injection device is used for injecting liquid into the battery shells, the plurality of battery shells only need to be transferred in the loading and taking processes, and the liquid injection process is completed in the battery bearing mechanism all the time. Therefore, the carrying action of the battery is reduced, and the liquid injection operation of the battery is more convenient.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a front view of a battery liquid filling device according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a jacking mechanism in the battery filling device shown in FIG. 1;

FIG. 3 is a side view of the jacking mechanism of FIG. 2;

FIG. 4 is a top view of a filling mechanism of the battery filling device shown in FIG. 1;

fig. 5 is an enlarged view of a part a of the liquid injection mechanism shown in fig. 4.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 3, a battery filling apparatus 100 according to a preferred embodiment of the present invention includes a frame 110, a filling mechanism 120, a battery loading mechanism 130, and a jacking mechanism 140.

The frame 110 is used for carrying and is generally made of metal. Specifically, in the present embodiment, the bracket 110 is a frame structure and can be formed by welding a plurality of metal rods. In order to ensure the levelness of the bracket 110, a plurality of legs 111 may be further provided at the bottom thereof, and the height of each leg 111 may be individually adjusted.

Further, the frame 110 is provided with a feeding station and an injection station which are arranged oppositely. Specifically, in the present embodiment, the frame 110 includes a bottom plate 112, a top plate 114 and a supporting plate 116, wherein the supporting plate 116 connects the bottom plate 112 and the top plate 114. Wherein the loading station is disposed on the bottom plate 112, and the injection station is disposed on the top plate 114. When the frame 110 is placed on the horizontal plane, the liquid injection station is positioned above the feeding station.

The liquid injection mechanism 120 includes an injection nozzle 121. Wherein, annotate liquid mouth 121 and install in annotating the liquid station and point to the material loading station. Specifically, the pouring nozzle 121 is attached to the top plate 114. The pouring nozzle 121 may extend into the battery case to complete the pouring of the electrolyte into the battery case. For the purpose of filling, the filling mechanism 120 generally further includes a liquid storage tank not shown in the figure and a connection pipe connecting the liquid storage tank and the filling nozzle 121.

In order to improve the efficiency of battery liquid injection. Specifically, in the present embodiment, the liquid pouring nozzle 121 is provided in plurality, and the plurality of liquid pouring nozzles 121 are arranged in parallel and have an adjustable pitch.

Therefore, the plurality of pouring nozzles 121 can simultaneously pour a row of battery cases. Moreover, due to the distance between the liquid injection nozzles 121, the distance between the liquid injection nozzles 121 can be adjusted according to different types of batteries, so that the battery liquid injection device 100 can adapt to batteries with more specifications.

Further, referring to fig. 4 and 5, in the present embodiment, the liquid injection mechanism 120 further includes a clamping plate 122 detachably mounted on the frame 110, a plurality of protrusions 1221 arranged at intervals are formed on an edge of the clamping plate 122 along a length direction, the liquid injection nozzles 121 are slidably mounted on the liquid injection station, and a clamping groove 1211 clamped with the protrusions 1221 is formed on a side surface of each liquid injection nozzle 121.

Specifically, the clamping plate 122 is in a strip shape and can be mounted on the top plate 114 by screw fastening, clamping, and the like. The extending direction of the catch plate 122 coincides with the arrangement direction of the plurality of pouring nozzles 121. The top plate 114 may be provided with a slide rail (not shown), and the plurality of pouring nozzles 121 may be slidably mounted on the top plate 114 by means of a slide block and a guide rail. When the projection 1221 is engaged with the engaging groove 1211, the position of the liquid pouring nozzle 121 is restricted, and the liquid pouring nozzle 121 cannot slide relative to the top plate 114. When the distance between the liquid pouring nozzles 121 needs to be adjusted, the clamping plate 122 can be taken down firstly. At this time, the pouring nozzle 121 is slidable along the top plate 114, and the distance between the pouring nozzle 121 and the top plate can be adjusted by moving the pouring nozzle 121. Finally, a corresponding type of the clamping plate 122 is selected to be mounted on the top plate 114, and the distance between the protrusions 1221 on the clamping plate 122 is equal to the distance between the locking grooves 1211 of the pouring nozzles 121, so that the locking grooves 1211 can be clamped with the protrusions 1221 again to reposition the pouring nozzles 121.

Specifically, in the present embodiment, the liquid injecting nozzle 121 is fixed to the fixing base 123, the fixing base 123 is slidably mounted on the top plate 114, and the locking slot 1211 is opened on a side surface of the fixing base 123. It is understood that the liquid pouring nozzle 121 may be directly mounted on the top plate 114, and the locking groove 1211 is opened at a side surface of the liquid pouring nozzle 121.

It should be noted that, in other embodiments, other ways of installing the liquid pouring nozzle 121 and adjusting the distance between the liquid pouring nozzles 121 may also be selected. For example, the top plate 114 is provided with a plurality of strip-shaped holes, and each pouring nozzle 121 is installed in the corresponding strip-shaped hole and fastened by a threaded fastener. When needs spacing, unscrew threaded fastener earlier, alright make annotate liquid mouth 121 slide in the bar hole, obtain required interval after, it can to screw up threaded fastener once more.

The battery carrier 130 is used to house a battery housing. Specifically, a plurality of battery receiving positions may be disposed in the battery carrying mechanism 130 to position each battery. The batteries are transferred manually or by robotic arm into the battery carrier 130 before they are weighed. The battery carrying mechanism 130 may be a tray having a housing space for accommodating the battery, and an opening of the tray faces the liquid injection station. When the materials are loaded, the battery shell to be injected is directly placed in the tray by a manipulator or a worker. Further, the battery carrying mechanism 130 may also be a tray support for carrying a tray. During feeding, the battery shell to be injected can be placed in the tray, and then the tray is integrally placed on the tray support.

In addition, the battery carrier 130 is not fixed to the frame 110, but is movable between the loading station and the filling station.

The jacking mechanism 140 is in transmission connection with the battery carrying mechanism 130 and can drive the battery carrying mechanism 130 to lift between the feeding station and the liquid injection station until the battery shell is in butt joint with or separated from the liquid injection nozzle 121. The jacking mechanism 140 is mounted to the frame 110. The jacking mechanism 140 may be fixedly disposed with respect to the frame 110, or may be slidably disposed with respect to the frame 110.

When liquid injection is performed, the battery carrying mechanism 130 is driven by the jacking mechanism 140 to move towards the liquid injection station. Since the pouring nozzle 121 is directed to the loading station. Therefore, by calibrating the positions of the battery carrier 130 and the pouring nozzle 121, when the battery carrier 130 is moved to a certain height, the battery case therein will be abutted with the pouring nozzle 121 for pouring. After the liquid injection is completed, the jacking mechanism 140 can drive the battery carrying mechanism 130 to reset and return to the loading station. At this time, the battery case in which the liquid injection is completed can be taken out.

Because the space inside the battery supporting mechanism 130 is large, a larger number of battery cases can be generally accommodated; and limited by structure and volume, the number of the liquid injection nozzles 121 which can be arranged at the liquid injection station is limited. Therefore, when the battery carrier mechanism 130 is full of batteries, the number of batteries is generally much larger than the number of pouring nozzles 121. Thus, the liquid injection mechanism 120 cannot inject liquid into all the batteries of the battery carrying mechanism 130, which affects the efficiency.

In order to solve the problem, in this embodiment, the battery liquid filling device 100 further includes a connecting plate 150 mounted on the frame 110, the connecting plate 150 is slidable along a first direction perpendicular to a connecting line between the loading station and the liquid filling station, and the battery loading mechanism 130 and the jacking mechanism 140 are mounted on the connecting plate 150.

Specifically, a connecting line between the feeding station and the liquid injection station refers to a vertical direction shown in fig. 1. Thus, the first direction may be a horizontal direction as shown in fig. 1 or a direction perpendicular to the drawing sheet. The connecting plate 150 is disposed on the bottom plate 112, a sliding rail (not shown) may be disposed on the bottom plate 112, and the connecting plate 150 may be slidably mounted on the bottom plate 112 by the way of the sliding rail and the sliding block.

The battery supporting mechanism 130 and the lifting mechanism 140 can slide along with the connecting plate 150, so as to change the relative position between the battery supporting mechanism 130 and the liquid pouring nozzle 121. When the relative positions of the battery and the liquid filling nozzle are changed, the battery shell at different positions of the battery bearing mechanism 130 can be butted with the liquid filling nozzle 121. Therefore, the battery shells in the battery bearing mechanism 130 can be all filled with liquid in sequence through the sliding connection plate 150, so that the efficiency is remarkably improved.

In this embodiment in particular, the connection plate 150 is driven by a slide drive 152. The sliding driving member 152 may be a cylinder, a screw pair of a motor, an electric cylinder, etc.

Further, in this embodiment, the liquid injection nozzles 121 are multiple and arranged in parallel along a second direction, and the second direction is perpendicular to a connecting line between the first direction and the feeding station.

As shown in fig. 1, the first direction refers to a direction perpendicular to the drawing sheet, and the second direction refers to a horizontal direction. Obviously, the first direction and the second direction may be interchanged depending on the difference in the viewing angle.

Since the plurality of pouring nozzles 121 are arranged side by side in the second direction, that is, in a row. Therefore, the jacking mechanism 140 can simultaneously realize the butt joint of a row of batteries in the battery bearing mechanism 130 and the liquid injection nozzle 121 through one-time jacking, and complete the liquid injection. Then, the jacking mechanism 140 is reset, and the connecting plate 150 drives the battery carrying mechanism 130 and the jacking mechanism 140 to slide along the first direction for a preset distance (the preset distance is the distance between the two rows of battery shells); the jacking mechanism 140 jacks up again, so that another row of batteries in the battery bearing mechanism 130 can be butted with the liquid injection nozzle 121. This cycle completes the process of filling all the batteries in the battery support mechanism 130.

The transmission connection between the jacking mechanism 140 and the battery carrying mechanism 130 is various, and only the battery carrying mechanism 120 can be moved between the loading station and the liquid injection station.

Specifically, in this embodiment, the jacking mechanism 140 includes a jacking driving member 141 and a guiding shaft 142, the battery carrying mechanism 130 is located on one side of the connecting plate 150 facing the liquid injection station, and the jacking driving member 141 is fixed on one side of the connecting plate 150 facing away from the liquid injection station.

The jacking driving member 141 may be a cylinder, a screw pair of a motor, an electric cylinder, etc., and the jacking driving member 141 in this embodiment is a cylinder. The guide shaft 142 is generally a metal rod, and has high mechanical strength and is not easily bent when being pressed. The battery supporting mechanism 130 and the lifting driving member 141 are respectively located at two sides of the connecting plate 150, which helps to keep the connecting plate 150 balanced during the sliding process. In addition, in order to avoid the lifting driving element 141 and the guiding shaft 142, an avoiding through groove may be formed on the bottom plate 112 along the moving path of the lifting driving element 141 and the guiding shaft 142.

In addition, the guide shaft 142 is slidably disposed through the connecting plate 150, and one end of the guide shaft 142 is fixedly connected to the driving end of the jacking driver 141, and the other end is fixedly connected to the battery supporting mechanism 130. Therefore, the lift driving member 141 drives the battery supporting mechanism 130 to ascend and descend through the guide shaft 142.

As shown in fig. 2 and 3, the housing of the lift actuator 141 is fixed to the connecting plate 150, and the piston rod extends in a direction away from the connecting plate 150. When the piston rod extends out, the battery carrying mechanism 130 can be driven to be far away from the liquid injection station, and when the piston rod retracts, the battery carrying mechanism 130 can be driven to be close to the liquid injection station. So set up, still can make climbing mechanism's structure compacter.

Moreover, since the guide shaft 142 passes through the connecting plate 150, the connecting plate 150 can laterally limit the guide shaft 142, thereby effectively preventing the guide shaft 142 from shaking during the process of driving the battery carrying mechanism 130 to ascend and descend, and facilitating the stability of the battery carrying mechanism 130. Specifically, in the present embodiment, the linear bearing 151 is embedded in the connecting plate 150, and the guide shaft 142 is inserted into the linear bearing 151.

The linear bearing 151 can effectively reduce the friction between the guide shaft 142 and the connecting plate 150, and prevent the guide shaft 142 and the connecting plate 150 from being worn due to relative movement. Moreover, the linear bearing 151 can significantly reduce the resistance applied to the guide shaft 142 during the movement process, so that the battery supporting mechanism 130 can be lifted more smoothly.

Further, in this embodiment, the jacking mechanism 140 further includes a push plate 143, the push plate 143 is fixedly connected to the driving end of the jacking driver 141, the plurality of guide shafts 142 are distributed along the circumferential direction of the jacking driver 141, and the plurality of guide shafts 142 are fixed to the push plate 143.

That is, the plurality of guide shafts 142 are fixedly coupled to the driving end of the lift driving member 141 through the push plate 143. The push plate 143 has a plate-like structure, the surface of which is kept horizontal. Under the drive of push pedal 143, a plurality of guiding axles 142 can realize synchronous lift to support battery bearing mechanism 130 from a plurality of different directions, thereby be favorable to further promoting battery bearing mechanism 130 in the stability of lift in-process.

During the process of jacking the battery carrier 130 to the filling station by the jacking mechanism 140, the battery housing may be skewed, thereby causing the position to change from the initial position. Moreover, the battery case is easily shaken in the jacking process. Thus, when the battery carrier 130 is lifted into position, the batteries therein may not be precisely aligned with the filling nozzle 121, and thus the docking and filling operations cannot be smoothly performed.

Referring to fig. 1 again, in the present embodiment, the battery liquid injection device 100 further includes a centering mechanism 160 mounted on the frame 110, the centering mechanism 160 has a clamping groove (not shown) with an opening facing the feeding station, and the liquid injection nozzle 121 is located in the clamping groove.

Since the pouring nozzle 121 is located in the clamping groove, the battery case in the battery carrier 130 needs to pass through the clamping groove to be butted against the pouring nozzle 121. The inner wall of the clamping groove can play a role in transverse limiting and deviation rectifying on the battery shell, so that the battery shell is prevented from shaking. And even if the battery shell is inclined in the jacking process, the battery shell can be reset under the action of the inner wall of the clamping groove when passing through the clamping groove. Therefore, the righting mechanism 160 can ensure that the battery shell and the liquid injection nozzle 121 are precisely butted, so as to ensure that the liquid injection process is smoothly performed.

Wherein, the size of pressing from both sides the groove is designed in advance to can just with battery case outer wall butt, but do not press from both sides tight battery case and be preferred.

Further, in this embodiment, the righting mechanism 160 includes two opposite limiting plates 161 with an adjustable distance, and a clamping groove is formed between the two limiting plates 161.

The limiting plate 161 has a flat surface and has a good supporting effect on the battery case. Moreover, the width of the clamping groove can be adjusted by adjusting the distance between the two limiting plates 161, so that the battery liquid filling device is applicable to battery cases of different models, and the application range of the battery liquid filling device 100 is enlarged.

Before the battery filling device 100 fills the liquid, the battery receiving case to be filled with the liquid may be placed in the battery carrying mechanism 130 at the loading station. Then, the jacking mechanism 140 drives the battery carrying mechanism 130 with the battery housing to move to the liquid injection station until the battery housing in the battery carrying mechanism 130 is in butt joint with the liquid injection nozzle 121, and then liquid injection is completed. Finally, the jacking mechanism 140 drives the battery carrying mechanism 130 to reset, so that the battery shell which is filled with the liquid is taken out. When the battery filling device 100 is used to fill the battery cases, the multiple battery cases only need to be transferred in the loading and unloading processes, and the filling process is always completed in the battery carrying mechanism 130. Therefore, the carrying action of the battery is reduced, and the liquid injection operation of the battery is more convenient.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A battery electrolyte injection device, comprising:

the machine frame is provided with a feeding station and a liquid injection station which are oppositely arranged;

the liquid injection mechanism comprises a liquid injection nozzle, and the liquid injection nozzle is mounted on the liquid injection station and points to the feeding station;

the battery bearing mechanism is used for accommodating the battery shell; and

and the jacking mechanism is in transmission connection with the battery bearing mechanism and can drive the battery bearing mechanism to lift between the loading station and the liquid injection station until the battery shell is in butt joint with or separated from the liquid injection nozzle.

2. The battery liquid injection device according to claim 1, further comprising a connecting plate mounted on the frame, wherein the connecting plate is slidable in a first direction perpendicular to a connecting line between the loading station and the liquid injection station, and the battery loading mechanism and the jacking mechanism are mounted on the connecting plate.

3. The battery liquid injection device according to claim 2, wherein the liquid injection nozzles are arranged in parallel along a second direction, and the second direction is perpendicular to a connecting line among the first direction, the loading station and the liquid injection station.

4. The battery liquid injection device according to claim 2, wherein the jacking mechanism includes a jacking driving member and a guiding shaft, the battery bearing mechanism is located on one side of the connecting plate facing the liquid injection station, the jacking driving member is fixed on one side of the connecting plate facing away from the liquid injection station, the guiding shaft slidably penetrates through the connecting plate, one end of the guiding shaft is fixedly connected with a driving end of the jacking driving member, and the other end of the guiding shaft is fixedly connected with the battery bearing mechanism.

5. The battery electrolyte injection device according to claim 4, wherein the jacking mechanism further comprises a push plate, the push plate is fixedly connected with the driving end of the jacking driving member, the plurality of guide shafts are distributed along the circumferential direction of the jacking driving member, and the plurality of guide shafts are fixed on the push plate.

6. The battery liquid filling device according to claim 4, wherein a linear bearing is embedded in the connecting plate, and the guide shaft is arranged in the linear bearing in a penetrating manner.

7. The battery liquid injection device according to claim 1, further comprising a centering mechanism mounted on the frame, wherein the centering mechanism has a clamping groove with an opening facing the loading station, and the liquid injection nozzle is located in the clamping groove.

8. The battery liquid injection device according to claim 7, wherein the righting mechanism comprises two oppositely-arranged spacing plates with an adjustable distance, and the clamping groove is formed between the two spacing plates.

9. The battery liquid filling device according to any one of claims 1 to 8, wherein the liquid filling nozzle is provided in plurality, and the plurality of liquid filling nozzles are arranged in parallel and have an adjustable pitch.

10. The battery liquid filling device according to claim 9, wherein the liquid filling mechanism further comprises a clamping plate detachably mounted on the frame, a plurality of protrusions arranged at intervals are formed on the edge of the clamping plate along the length direction, the liquid filling nozzles are slidably mounted on the liquid filling station, and a clamping groove clamped with the protrusions is formed on the side surface of each liquid filling nozzle.

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