CN221176603U - Annotate liquid head device and annotate liquid system - Google Patents

Abstract

The utility model discloses a liquid injection head device and a liquid injection system. The liquid injection head device comprises a liquid injection bracket component and at least two liquid injection pieces; the priming member is movably connected to the priming support member in a first direction relative to the priming support member, and at least two priming members are movable relative to each other in the first direction. According to the liquid injection head device of the present utility model, the liquid injection head device comprises at least two liquid injection pieces, and two of the at least two liquid injection pieces can move relative to each other along a first direction, so that the liquid injection head device can be suitable for battery shells with different shapes; and electrolyte may be simultaneously injected into different portions of the battery case so that the electrolyte entering the battery case can fill the inner space of the battery case as much as possible.

Description

Annotate liquid head device and annotate liquid system

Technical Field

The utility model relates to the field of battery processing equipment, in particular to a liquid injection head device and a liquid injection system.

Background

The existing liquid injection head moves downwards from the upper part of the battery shell through a liquid injection piece so as to extend into the battery shell, so that electrolyte is injected into the battery shell. Electrolyte can be injected into the battery case at only one position through one injection head. So that it is difficult for the electrolyte to fill the battery case.

To this end, the present utility model provides a priming head device and priming system to at least partially address the above-mentioned problems.

Disclosure of utility model

In the summary, a series of concepts in simplified form are introduced, which will be further described in detail in the detailed description. The summary of the utility model is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above technical problems, the present utility model provides a liquid injection head device, including:

A liquid injection support assembly;

At least two liquid injection pieces are movably connected to the liquid injection support assembly relative to the liquid injection support assembly in a first direction, and the at least two liquid injection pieces are movable relative to each other in the first direction.

According to the liquid injection head device of the present utility model, the liquid injection head device comprises at least two liquid injection pieces, and two of the at least two liquid injection pieces can move relative to each other along a first direction, so that the liquid injection head device can be suitable for battery shells with different shapes; and electrolyte may be simultaneously injected into different portions of the battery case so that the electrolyte entering the battery case can fill the inner space of the battery case as much as possible.

Optionally, the plurality of liquid injection pieces form at least two array portions, and the plurality of liquid injection pieces of the array portions are arranged in an array.

Optionally, the array portion comprises a rectangular array and/or a circular array.

Optionally, the priming support assembly comprises:

the inner support is provided with at least one liquid injection piece;

The transition support is provided with at least one liquid injection piece, and the transition support is provided with a transition mounting hole, and the periphery of the inner support is sleeved with the transition mounting hole.

Optionally, the outer contour of the inner support has an arcuate surface.

Optionally, the liquid injection support assembly further comprises an outer support, the outer support is provided with at least one liquid injection piece, the outer support is provided with an outer mounting hole, and the outer mounting hole is sleeved on the periphery of the transition support.

Optionally, the outer contour of the transition support has a flat surface.

Optionally, the liquid injection head device further comprises:

The vacuum shells are connected to the liquid injection bracket assembly, each vacuum shell is provided with an inner cavity and an opening communicated with the inner cavity, and the edges of the openings are used for abutting against the battery shell to seal the inner cavity;

And the vacuum pipes are in one-to-one correspondence with the liquid injection pieces, penetrate through the vacuum shell to be communicated with the inner cavity, and are used for extracting gas in the inner cavity.

Optionally, the vacuum housing is movable relative to the priming support member in a first direction.

Optionally, the liquid injection head device further comprises piercing elements in one-to-one correspondence with the liquid injection elements, the piercing elements are movable relative to the vacuum shell and used for piercing the battery shell to form a liquid injection port for the liquid injection elements to penetrate, and the piercing elements are located in the internal cavity.

Optionally, the liquid injection head device further comprises a mounting piece corresponding to the liquid injection pieces one by one, wherein the mounting piece is movable relative to the vacuum shell and is used for closing or opening the liquid injection port, and the mounting piece is located in the inner cavity.

Optionally, the liquid injection head device further comprises a rotating shaft corresponding to the liquid injection pieces one by one, the rotating shaft is rotatably arranged on the vacuum shell in a penetrating manner relative to the liquid injection support assembly around the axis of the rotating shaft, and the liquid injection pieces, the puncture pieces and the mounting pieces are rotatably arranged around the axis of the rotating shaft.

Optionally, the injection member, the penetration member and the mounting member are connected to the spindle.

Optionally, the liquid injection head device further comprises a controller, wherein the controller is electrically connected with the liquid injection pieces, and the controller is configured to determine the corresponding number and positions of the liquid injection pieces according to the shape of the battery shell, so as to be used for injecting electrolyte into the battery shell.

The utility model also provides a liquid injection system, which comprises the liquid injection head device.

The liquid injection system according to the utility model comprises the liquid injection head device, wherein the liquid injection head device comprises at least two liquid injection pieces, and two of the at least two liquid injection pieces can move relative to each other along a first direction, so that the liquid injection head device can be suitable for battery shells with different shapes; and electrolyte may be simultaneously injected into different portions of the battery case so that the electrolyte entering the battery case can fill the inner space of the battery case as much as possible.

Optionally, the liquid injection system further comprises:

The first bracket is connected to the liquid injection head device and is movably arranged along the vertical direction;

a second bracket movably disposed in a horizontal direction;

and a third bracket movably connected to the second bracket in a vertical direction, the third bracket for supporting the battery case.

Optionally, the liquid injection system further includes a fixing bracket movably connected to the third bracket in a horizontal direction for clamping a side surface of a battery case provided to the third bracket.

Drawings

In order that the advantages of the utility model will be readily understood, a more particular description of the utility model briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the utility model and are not therefore to be considered to be limiting of its scope, the utility model will be described and explained with additional specificity and detail through the use of the accompanying drawings.

FIG. 1 is a schematic bottom view of a liquid injection head device according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic bottom view of a priming member of the priming head device of FIG. 1; and

Fig. 3 is a schematic front view of a liquid injection system according to a preferred embodiment of the present utility model.

Description of the reference numerals

110: Annotate liquid support subassembly 111: internal support

112: Transition support 113: transitional mounting hole

114: The outer bracket 115: external mounting hole

120: Annotate liquid subassembly 121: liquid injection part

122: Vacuum housing 123: vacuum tube

124: Piercing member 125: mounting member

126: Internal cavity 127: rotating shaft

128: Opening 130: host machine

131: First bracket 132: second support

133: Third bracket 134: fixing support

135: A stopper 140, a first array portion;

141. A second array portion 142, a third array portion;

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that embodiments of the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the utility model.

Preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be noted that the terms "upper," "lower," and the like are used herein for purposes of illustration only and not limitation.

Herein, ordinal words such as "first" and "second" cited in the present utility model are merely identifiers and do not have any other meaning, such as a particular order or the like.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present utility model. It will be apparent that embodiments of the utility model may be practiced without limitation to the specific details that are set forth by those skilled in the art. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.

The utility model provides a liquid injection head device. The electrolyte injection head device is capable of injecting electrolyte into a cell having a large volume through at least two electrolyte injection members 121. The electrolyte injection head device can simultaneously inject electrolyte into at least two batteries with small volumes. The injector head assembly may also select the appropriate locations and number of injectors 121 depending on the particular shape of the battery housing of the battery.

Referring to fig. 1-3, the filling head device includes a filling stand assembly 110. The priming cartridge assembly 110 is adapted to be coupled to a priming host 130, hereinafter, via a first bracket 131, hereinafter.

As shown in fig. 1 and 2, the injection head device further includes an injection assembly 120. The number of the liquid injection components 120 is at least two. The liquid injection assembly 120 includes a liquid injection member 121 and a telescopic rod. Specifically, each of the injection assemblies 120 includes an injection member 121, a vacuum housing 122, a vacuum tube 123, a piercing member 124, a mounting member 125, and a shaft 127.

The injection member 121 may have a long tubular structure. The injection member 121 has an injection passage therein. The priming member 121 is connected to the priming support member 110. The filler 121 may be connected to the internal space of the electrolyte containing tank to be described later through a pipe. In a first direction (e.g., the first direction may be parallel to the vertical direction), the priming member 121 is movably disposed with respect to the priming carriage assembly 110. For example, the pouring spout 121 is connected to a rotary shaft 127 to be described later by a telescopic rod.

Thus, when the priming hanger assembly 110 is in proximity to the battery housing, the priming member 121 is movable in a first direction to extend into the priming port of the battery housing and thereby into the battery housing. At this time, the electrolyte may be injected into the inner space of the battery case through the injection member 121.

As shown in fig. 1, the infusion support assembly 110 is provided with at least two infusion pieces 121. At least two liquid injection pieces 121 are uniformly spaced within the projected outer contour of the liquid injection support assembly 110 on the projection surface. The projection plane is perpendicular to the first direction.

In the first direction, one of any two of the at least two injection pieces 121 is movably disposed with respect to the other. In this way, the movement of each of the liquid injection members 121 can be individually controlled as needed to individually inject the electrolyte into the battery case.

Those skilled in the art will appreciate that the shape of the battery housing is variable. Referring to fig. 1, the above arrangement may select the array portion (appropriate array portion) to be later corresponding to the shape of the battery case according to the shape of the battery case (e.g., circular and square, etc.). For example, for a battery case whose projection on the projection surface is circular, a circular array can be selected in which the area where the projection on the projection surface is located can cover the projection on the projection surface of the battery case. For a battery case whose projection on the projection plane is rectangular, a rectangular array in which the projection on the projection plane can be covered by the area where the projection on the projection plane is located may be selected.

In this way, the electrolyte may be simultaneously injected into different portions of the battery case through the injection members 121 of the selected array portions so that the electrolyte entering the battery case can fill the inner space of the battery case as much as possible. In this way, the liquid filling head device can be applied to battery cases of different shapes.

It will be appreciated that in embodiments not shown, where at least two smaller cells are connected together to form a battery, the injector head apparatus of the present utility model is capable of injecting electrolyte into at least two cells separately.

In this embodiment, the liquid injection head device includes at least two liquid injection pieces 121, and two of the at least two liquid injection pieces 121 are movable relative to each other in the first direction, so that the liquid injection head device can be applied to battery cases of different shapes; and electrolyte may be simultaneously injected into different portions of the battery case so that the electrolyte entering the battery case can fill the inner space of the battery case as much as possible.

Preferably, as shown in FIG. 1, a plurality of injection assemblies 120 form at least two array portions. Each array portion is arranged in an array. Specifically, each array portion is disposed in a projection array of the projection surface. At least two array portions of the plurality of liquid injection modules 120 are respectively applicable to at least two battery cases of different shapes.

It will be appreciated that in embodiments not shown, the positions of any two of the infusion assemblies of each array portion in the first direction may be the same or different.

Specifically, the array part includes a first array part 140 and a second array part 141. The first array portion 140 is located in an area surrounded by the second array portion 141.

The infusion support assembly 110 includes an inner support 111 and a transition support 112. The inner support 111 is provided with at least one (e.g. 9) infusion assemblies 120. The portion of the infusion assembly 120 on the inner support 111 forms a first array portion 140. The transition support 112 is provided with at least one (e.g., 16) infusion assemblies 120. The infusion assembly 120 on the transition piece 112 forms a second array portion 141. The transition support 112 has a transition mounting hole 113. The transition mounting hole 113 is slightly larger than the inner bracket 111. The transition mounting hole 113 is sleeved on the outer periphery of the inner bracket 111. Thus, for a battery case having a small size, the electrolyte can be injected into the battery case by selecting the injection member 121 provided in the inner holder 111. For battery cases with larger dimensions, electrolyte can be injected into the battery case simultaneously through the injection member 121 provided to the inner holder 111 and the injection member 121 provided to the transition holder 112. Therefore, the application range of the liquid injection head device is increased.

Further preferably, with continued reference to fig. 1, the outer contour of the inner support 111 has an arcuate surface. For example, the outer contour of the projection of the inner holder 111 on the projection surface is circular. Correspondingly, the transition mounting hole 113 is a round hole. The first array portion 140 is a rectangular array. That is, the center points of projections of all the objects of the first array portion 140 on the projection plane are arranged in a rectangular array. Thereby, the structure of the inner bracket 111 is simple.

As shown in fig. 1, the array part further includes a third array part 142. The second array portion 141 is located in an area surrounded by the third array portion 142. The infusion support assembly 110 also includes an outer support 114. The outer support 114 is provided with at least one (e.g., 9) infusion assemblies 120. The outer bracket 114 has an outer mounting hole 115. The outer mounting holes 115 are slightly larger than the transition brackets 112. The outer mounting hole 115 is sleeved on the outer periphery of the transition bracket 112.

For larger battery cases, electrolyte can be injected into the battery case simultaneously by the injection member 121 provided to the inner holder 111, the injection member 121 provided to the transition holder 112, and the injection member 121 provided to the outer holder 114. Therefore, the application range of the liquid filling head device can be further increased.

It will be appreciated that in embodiments not shown, a greater number of brackets may be provided to increase the range of applicability of the priming head set device.

Further, as shown in fig. 1, the outer contour of the transition support 112 has a flat surface. Specifically, the outer contour of the projection of the transition support 112 on the projection surface is rectangular. Correspondingly, the external mounting hole 115 is a rectangular hole. The second array portion 141 is a rectangular array. The third array portion 142 is a circular array. That is, the center points of projections of all the objects of the second array section 141 on the projection plane are arranged in a rectangular array. All objects of the third array part 142 are arranged in a circular array at the center point of projection of the projection plane, and thus the structure of the transition support 112 is simple.

It should be noted that, herein, a line connecting the center points of the projections of each object of the circular array (herein, the object is the liquid injection assembly 120) on the projection surface is a circle, and a line connecting the center points of the projections of each object of the rectangular array (herein, the object is the liquid injection assembly 120) on the projection surface is a rectangle.

As shown in fig. 1, the outer contour of the projection of the outer bracket 114 on the projection surface has a circular configuration. Thereby facilitating the processing of the outer bracket 114.

As shown in FIG. 2, each priming assembly 120 further includes a vacuum housing 122, a vacuum tube 123, a spindle 127, a piercing member 124, and a mounting member 125. That is, the vacuum housing 122 corresponds to the injection member 121 one by one, the vacuum tube 123 corresponds to the injection member 121 one by one, the rotation shaft 127 corresponds to the injection member 121 one by one, the puncture member 124 corresponds to the injection member 121 one by one, and the mounting member 125 corresponds to the injection member 121 one by one.

Vacuum housing 122 is connected to the fluid injection stand assembly 110. Thus, the vacuum housing 122 and the injection support assembly 110 move together. The vacuum housing 122 has an interior cavity 126 and an opening 128 communicating with the interior cavity 126. The rim of the vacuum housing 122 that constitutes the opening 128 is adapted to abut the battery housing to enclose the internal cavity 126. The syringe 121 is positioned within the interior cavity 126. In the first direction, the syringe 121 is movable relative to the vacuum housing 122. The pipe communicating with the liquid injection member 121 is provided through the vacuum casing 122.

The internal passage of vacuum tube 123 is separated from the internal passage of the tube communicating with pouring member 121. Vacuum tube 123 extends through vacuum housing 122 to communicate with internal cavity 126. The vacuum tube 123 may be connected to a vacuum pump, which will be described later, by a pipe for pumping out the gas in the inner cavity 126, thereby forming a vacuum environment in the inner cavity 126 of the vacuum housing 122. At this time, the filler 121 may be inserted through the filler port and enter the battery case. In this way, the electrolyte in the electrolyte containing tank can be injected into the battery case via the injection member 121 due to the negative pressure.

In a first direction, the vacuum housing 122 is movable relative to the priming carriage assembly 110. In this way, maintenance of the vacuum housing 122 is facilitated.

It will be appreciated that in embodiments not shown, the vacuum housing may be fixedly connected to the infusion support assembly.

With continued reference to FIG. 2, the piercing member 124 is positioned within the internal cavity 126. The piercing member 124 may be a piercing needle. The puncture needle is connected to a rotation shaft 127 to be described later by a telescopic rod. Thus, in a first direction, the piercing member 124 is movable relative to the vacuum housing 122. In this way, the filler piece 121 can be used to pierce the battery case to form a filler neck through which the filler piece 121 is threaded. Therefore, the liquid injection port is conveniently formed.

As shown in fig. 2, the mounting member 125 is positioned within the interior cavity 126. The mounting member 125 may be connected to a later-described rotary shaft 127 by a telescopic rod. Thus, in a first direction, the mount 125 is movable relative to the vacuum housing 122. The mounting member 125 may close the pouring spout. The mounting member 125 may also be used to open the fill port. The manner in which the mounting member 125 closes or opens the pouring spout is known in the art and will not be described in detail herein. Thus, after the pouring is completed, the pouring spout 121 is separated from the pouring spout, and the mounting member 125 can be moved to the pouring spout to close the pouring spout.

The telescopic rod connected to the mount 125 and the telescopic rod connected to the puncture member 124 are spaced apart from each other by the telescopic rod connected to the injection member 121.

Further, the rotation shaft 127 and the inner cavity 126 of the vacuum housing 122 are coaxially disposed. The rotating shaft 127 penetrates through the vacuum shell 122. The rotation shaft 127 is rotatable about an axis of the rotation shaft 127 with respect to the vacuum casing 122. That is, the shaft 127 is rotatable about the axis of the shaft 127 with respect to the pouring stand assembly 110. The pouring member 121, the penetrating member 124, and the mounting member 125 are rotatably provided around the axis of the rotation shaft 127. The inside of the rotary shaft 127 has a central passage, and a pipe communicating with the internal passage of the pouring member 121, and a portion of the vacuum tube 123 are located in the central passage. Thus, the priming member 120 is simple in structure.

As shown in fig. 2, the injection member 121, the puncture member 124, and the mounting member 125 are all connected to a rotation shaft 127.

With continued reference to fig. 2, the injection member 121, the piercing member 124 and the mounting member 125 are sequentially disposed at intervals in a circumferential direction about an axis of the rotary shaft 127. Thus, the priming member 120 is simple in structure.

Preferably, the priming head device further comprises a controller (not shown) in electrical connection with the priming member. The controller is configured to determine a corresponding number and location of the electrolyte injection assemblies 120 for injecting electrolyte into the battery housing based on the shape of the battery housing. Thus, the liquid injection head device can be applied to processing of batteries with different shapes.

The utility model also provides a liquid injection system. The liquid injection system comprises the liquid injection head device.

In this embodiment, the liquid injection system includes the aforementioned liquid injection head device, and the liquid injection head device includes at least two liquid injection pieces 121, and two of the at least two liquid injection pieces 121 are movable relative to each other along the first direction, so that the liquid injection head device can be applied to battery cases of different shapes; and electrolyte may be simultaneously injected into different portions of the battery case so that the electrolyte entering the battery case can fill the inner space of the battery case as much as possible.

Preferably, as shown in FIG. 3, the priming system includes a host 130. The main body 130 is provided with the aforementioned vacuum pump and electrolyte accommodating tank. The host 130 further includes a first bracket 131 and a first driving assembly. The first driving assembly is connected to the first bracket 131 to drive the first bracket 131 to move in a first direction.

The first drive assembly may include a first telescoping rod disposed along a first direction. Thereby, the structure of the first driving assembly is simple.

With continued reference to fig. 3, the first bracket 131 is connected to the priming rack assembly 110 for driving the priming rack assembly 110 to move in the first direction.

The host 130 also includes a second bracket 132 and a second drive assembly. The second driving assembly is connected to the second bracket 132 to drive the second bracket 132 to move in a horizontal direction.

The second driving assembly may include a second telescopic rod disposed in a horizontal direction. Thereby, the structure of the second driving assembly is simple.

The host 130 further includes a third bracket 133 and a third driving assembly. The third bracket 133 and the third driving assembly are both disposed on the second bracket 132. The third driving assembly is connected to the third bracket 133 to drive the third bracket 133 to move in the first direction.

The third drive assembly may include a third telescoping rod disposed along the first direction. Thereby, the structure of the third driving assembly is simple.

Referring to fig. 3, a battery case may be disposed at the third bracket 133. Thus, the second bracket 132 drives the third bracket 133 to move in the horizontal direction, and further drives the battery case to move in the horizontal direction. The third bracket 133 drives the battery case to move in the vertical direction.

The priming system also includes a stationary carriage 134 and a stationary carriage drive assembly. The fixing bracket 134 is movably connected to the third bracket 133 in a horizontal direction for clamping a side surface of a battery case provided to the third bracket 133.

The fixed bracket driving assembly is connected to the fixed bracket 134 to drive the fixed bracket 134 to move in a horizontal direction.

The fixed bracket driving assembly may include a fixed bracket telescopic rod disposed in a horizontal direction. Therefore, the fixed support driving assembly is simple in structure.

After the battery case is placed on the third bracket 133, the fixing bracket 134 may be driven to move in a horizontal direction by the fixing bracket driving assembly to clamp an outer side surface of the battery case, thereby fixing the battery case.

Preferably, as shown in fig. 3, the liquid injection system further includes a limiting member 135 disposed on the main unit 130. When the first bracket 131 moves up to the stopper 135, the stopper 135 can block the first bracket 131 from continuing to move up.

The working process of the liquid injection system is as follows:

Selecting an appropriate array portion according to the battery case; the battery case is placed in the third holder 133. The fixing bracket 134 is moved in the horizontal direction to clamp the outer side surface of the battery case. Moving the second support 132 in the horizontal direction to move the battery housing directly under the liquid injection support assembly 110; moving the priming rack assembly 110 downward and the third rack 133 upward; moving the vacuum housing 122 toward the battery case to abut to the battery case; operating the vacuum pump to cause the interior cavity 126 of the vacuum housing 122 to form a vacuum environment; rotating the shaft 127 to rotate the piercing member 124 to a predetermined position and move downward to penetrate the battery case, thereby forming a liquid injection port; the piercing member 124 is then moved upwardly away from the battery housing; rotating the rotating shaft 127 to rotate the liquid injection member 121 to the liquid injection port; the filler piece 121 is moved downward to pass through the filler port into the battery case. At this time, the electrolyte in the electrolyte containing tank may be injected into the battery case through the injection member 121.

When the volume of the electrolyte in the battery case is a preset volume, the liquid injection member 121 is moved upward away from the battery case; rotating the rotating shaft 127 to move the mounting member 125 to the liquid injection port; operating the mounting member 125 to close the liquid injection port; moving the mounting member 125 upward to leave the battery case; the rotation shaft 127 is rotated to rotate the mounting member 125 to the initial position.

The present utility model has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. In addition, it will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the utility model. Terms such as "component" as used herein may refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like as used herein may refer to one component being directly attached to another component or to one component being attached to another component through an intermediary. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

Claims (17)

1. A liquid injection head device, characterized in that the liquid injection head device comprises:

A liquid injection stand assembly (110);

-at least two liquid injection pieces (121), said liquid injection pieces (121) being movably connected to said liquid injection holder assembly (110) with respect to said liquid injection holder assembly (110) in a first direction, in which first direction at least two of said liquid injection pieces (121) are movable with respect to each other.

2. The filling head device according to claim 1, wherein a plurality of the filling members (121) constitute at least two array portions, and a plurality of the filling members (121) of the array portions are arranged in an array.

3. The fill head device of claim 2, wherein the array portion comprises a rectangular array and/or a circular array.

4. The filling head device according to claim 1, wherein the filling stand assembly (110) comprises:

-an inner support (111), said inner support (111) being provided with at least one of said liquid-injecting members (121);

The transition support (112), transition support (112) are provided with at least one annotate liquid piece (121), transition support (112) have transition mounting hole (113), transition mounting hole (113) cover is located the periphery of inside support (111).

5. The filling head device according to claim 4, wherein the outer contour of the inner support (111) has an arcuate surface.

6. The filling head device according to claim 4, wherein the filling holder assembly (110) further comprises an outer holder (114), the outer holder (114) being provided with at least one filling member (121), the outer holder (114) having an outer mounting hole (115), the outer mounting hole (115) being sleeved on the outer periphery of the transition holder (112).

7. The filling head device according to claim 6, wherein the outer contour of the transition support (112) has a planar surface.

8. The fill head device of claim 1, further comprising:

A vacuum shell (122) in one-to-one correspondence with the liquid injection pieces (121), wherein the vacuum shell (122) is connected to the liquid injection support assembly (110), the vacuum shell (122) is provided with an inner cavity (126) and an opening (128) communicated with the inner cavity (126), and the edge of the opening (128) is used for abutting against a battery shell so as to seal the inner cavity (126);

and the vacuum pipes (123) are in one-to-one correspondence with the liquid injection pieces (121), the vacuum pipes (123) penetrate through the vacuum shell (122) so as to be communicated with the inner cavity (126), and the vacuum pipes (123) are used for pumping out gas in the inner cavity (126).

9. The filling head device according to claim 8, wherein the vacuum housing (122) is movable relative to the filling support assembly (110) in the first direction.

10. The injector head device according to claim 8, further comprising a piercing member (124) in one-to-one correspondence with the injector member (121), the piercing member (124) being movable relative to the vacuum housing (122) for piercing the battery housing to form an injector port through which the injector member (121) is pierced, the piercing member (124) being located within the internal cavity (126).

11. The filling head device according to claim 10, further comprising a mounting member (125) in one-to-one correspondence with the filling member (121), the mounting member (125) being movable relative to the vacuum housing (122) for closing or opening the filling port, the mounting member (125) being located within the internal cavity (126).

12. The liquid injection head device according to claim 11, further comprising a rotating shaft (127) in one-to-one correspondence with the liquid injection member (121), wherein the rotating shaft (127) is rotatably penetrating the vacuum housing (122) around an axis of the rotating shaft (127) relative to the liquid injection support assembly (110), and the liquid injection member (121), the penetrating member (124) and the mounting member (125) are rotatably disposed around an axis of the rotating shaft (127).

13. The filling head device according to claim 12, wherein the filling member (121), the piercing member (124) and the mounting member (125) are connected to the rotation shaft (127).

14. The fill head device of claim 1, further comprising a controller electrically connected to the fill members, the controller configured to determine a corresponding number and location of the fill members for filling the battery housing based on a shape of the battery housing.

15. A liquid injection system, characterized in that it comprises a liquid injection head device according to any one of claims 1 to 14.

16. The fluid injection system of claim 15, further comprising:

-a first bracket (131), the first bracket (131) being connected to the filling head device, the first bracket (131) being movably arranged in a vertical direction;

A second bracket (132), the second bracket (132) being movably disposed in a horizontal direction;

And a third bracket (133), the third bracket (133) being movably connected to the second bracket (132) in a vertical direction, the third bracket (133) for supporting a battery case.

17. The liquid injection system according to claim 16, further comprising a stationary bracket (134), the stationary bracket (134) being movably connected to the third bracket (133) in a horizontal direction for clamping a side of a battery housing provided to the third bracket (133).