Battery liquid injection device and system

Abstract

The utility model discloses a battery liquid injection device and system, and the battery liquid injection device comprises a liquid injection cup which is provided with a liquid injection port, and the liquid injection port is communicated with the interior of the liquid injection cup; and the sleeve is in sealed communication with the liquid injection opening, the sleeve comprises a first pipe and a second pipe arranged in the first pipe in a sleeved mode, one of the first pipe and the second pipe is used for vacuumizing the interior of the liquid injection cup, and the other one of the first pipe and the second pipe is used for enabling electrolyte to flow into the liquid injection cup. According to the battery liquid injection device, after the liquid injection cup and the battery are vacuumized, the electrolyte can be directly injected into the liquid injection cup, the liquid injection needle does not need to be moved, the liquid injection procedure is simplified while the device structure is simplified, operation is convenient, time is saved, and then the production efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of power battery manufacturing equipment, and specifically relates to a battery liquid injection device and system. Background Art

[0002] After the battery cell is assembled, electrolyte needs to be injected. In the related art, the operation of injecting electrolyte into the battery is generally to connect the injection cup to the battery cavity, first evacuate the injection cup and the battery cavity, and after confirming that there is no leakage, move the injection needle to align with the injection port of the injection cup, and inject the electrolyte into the injection cup through the injection pump, and then inject it into the battery from the injection cup. In this way, the required injection device has a complex structure, cumbersome and complicated operation, takes a long time, and the equipment is bulky and inconvenient to use. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a battery filling device and system, which can directly fill the battery with liquid after vacuuming without moving the filling needle, simplifying the device structure, facilitating operation, and thus helping to improve production efficiency.

[0004] In a first aspect, the utility model provides a battery liquid filling device, the battery liquid filling device comprising:

[0005] A liquid injection cup, wherein the liquid injection cup has a liquid injection port, and the liquid injection port is connected to the interior of the liquid injection cup;

[0006] The sleeve is sealed and connected with the liquid injection port. The sleeve includes a first tube and a second tube sleeved inside the first tube. One of the first tube and the second tube is used to evacuate the inside of the liquid injection cup, and the other is used for the electrolyte to flow into the liquid injection cup.

[0007] As an optional solution, a clamping portion is provided on the outer wall of the first tube, a matching portion is provided on the liquid injection port, the sleeve is plugged and matched with the liquid injection port, and the clamping portion and the matching portion are clamped and fastened.

[0008] As an optional solution, at least two limiting members are further included. The at least two limiting members are arranged between the first tube and the second tube and are distributed at intervals along the circumference of the second tube. The at least two limiting members and the second tube limit each other.

[0009] As an optional solution, a disturbance component is also included, a partial area of ​​the disturbance component is located inside the liquid filling cup and is used to increase the flow rate of the electrolyte inside the liquid filling cup.

[0010] As an optional solution, the disturbance component includes a blade, which is located inside the liquid filling cup. The blade is used to rotate when driven by an external force to increase the flow rate of the electrolyte inside the liquid filling cup.

[0011] As an optional solution, the liquid injection cup further has a liquid outlet, and the blades are distributed in a spiral pattern at intervals in a direction from the liquid injection outlet to the liquid outlet.

[0012] As an optional solution, the disturbance component also includes a drive motor and a transmission shaft drivingly connected to the drive motor. The drive motor is located outside the liquid injection cup, and the transmission shaft passes through the liquid injection cup and is drivingly connected to the blade.

[0013] As an optional solution, a seal is provided at the connection between the transmission shaft and the liquid injection cup.

[0014] As an optional solution, an air extraction pipe is also included. The air extraction pipe is arranged at an end of the sleeve away from the liquid injection port, and the air extraction pipe is sealed and connected to the first tube.

[0015] In a second aspect, the utility model provides a battery injection system, comprising a battery, an injection pump and the battery injection device of the first aspect, wherein the input end of the injection pump is connected to an electrolyte storage device, and the output end of the injection pump is sealed and connected to a second tube.

[0016] The battery liquid filling device and system of the utility model is provided with a liquid filling cup and a sleeve. The liquid filling cup has a liquid filling port, and the liquid filling port is connected to the inside of the liquid filling cup; the sleeve is sealed and connected to the liquid filling port, and the sleeve includes a first tube and a second tube sleeved inside the first tube, one of the first tube and the second tube is used to evacuate the inside of the liquid filling cup, and the other is used for the electrolyte to flow into the inside of the liquid filling cup. The battery liquid filling device and system of the utility model, the setting of the sleeve allows the vacuuming pipeline and the liquid filling pipeline to be combined, so that after the liquid filling cup is evacuated, the electrolyte can be directly injected into the liquid filling cup and the inside of the battery without moving the liquid filling needle, which simplifies the device structure and the liquid filling process at the same time, is easy to operate, saves time, and can effectively improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0018] Figure 1 It is a structural schematic diagram of a battery liquid filling device of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a disturbance component in a battery liquid injection device of the utility model;

[0020] Figure 3 It is a structural schematic diagram of a sleeve in a battery liquid injection device of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure inside a sleeve in a battery liquid injection device of the utility model;

[0022] Figure 5 It is a structural schematic diagram of a battery liquid filling system of the utility model;

[0023] Figure 6 The utility model is a schematic diagram of the cross-sectional structure of a battery liquid filling system.

[0024] In the figure,

[0025] 100. Battery filling device;

[0026] 10. Liquid injection cup, 11. Liquid injection port, 12. Liquid outlet;

[0027] 20. sleeve, 21. first tube, 22. second tube, 23. boss, 24. stopper;

[0028] 30. disturbance component, 31. blade, 32. transmission shaft, 33. drive motor, 34. seal;

[0029] 40. Air extraction tube, 50. Liquid injection tube.

[0030] 200, battery filling system, 201, bracket, 202, battery; DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In the related art, the operation of injecting electrolyte into the battery is generally to connect the injection cup with the battery cavity, first evacuate the injection cup and the battery cavity, and after confirming that there is no leakage, move the injection needle to the position of the injection cup, control the injection needle to align with the injection port of the injection cup, and inject the electrolyte into the injection cup through the injection pump, and then carry the battery and the injection cup to the static station through the tray, and after multiple cycles of vacuuming and pressurizing, inject the electrolyte into the battery. It can be seen that the injection device in the related art has a complex structure, many operating procedures, and is time-consuming.

[0034] Based on the above problems, an embodiment of the present application provides a battery liquid injection device 100, such as Figure 1-4 As shown, the battery filling device 100 includes:

[0035] A liquid injection cup 10, wherein the liquid injection cup 10 has a liquid injection port 11, and the liquid injection port 11 is connected to the interior of the liquid injection cup 10;

[0036] The sleeve 20 is sealed and connected to the liquid injection port 11. The sleeve 20 includes a first tube 21 and a second tube 22 sleeved inside the first tube 21. One of the first tube 21 and the second tube 22 is used to evacuate the inside of the liquid injection cup 10, and the other is used for the electrolyte to flow into the liquid injection cup 10.

[0037] It should be noted that the injection cup 10 is mainly used to hold the electrolyte to be injected into the battery 202. Before the electrolyte is injected into the battery 202, the electrolyte is generally injected into the injection cup 10 first, and then injected into the battery 202 from the injection cup 10. Among them, the injection port 11 is used for the external electrolyte to flow into the injection cup 10. The injection port 11 can be set at any position of the injection cup 10, such as but not limited to the end face or side wall of the injection cup 10. In actual processing, it is set according to the layout of the entire device and the convenience of use.

[0038] It is understandable that, referring to Figure 5 and Figure 6 As shown, since the liquid outlet 12 of the filling cup 10 is sealed and connected to the electrolyte filling port of the battery 202 before the electrolyte is injected into the battery 202, it is necessary to evacuate the battery 202 to check whether the sealing between the electrolyte filling port of the battery 202 and the liquid outlet 12 of the filling cup 10 is good, thereby ensuring that the electrolyte can be reliably injected into the battery 202 to avoid leakage. In an embodiment of the present application, a sleeve 20 is provided, and the sleeve 20 includes a first tube 21 and a second tube 22 which are sleeved with each other. One of the first tube 21 and the second tube 22 is used to evacuate the liquid filling cup 10, and the other is used to inject the electrolyte into the liquid filling cup 10. For example, the first tube 21 is used to evacuate the liquid filling cup 10, and the second tube 22 is used to inject the electrolyte into the liquid filling cup 10. The sleeve 20 is sealedly connected to the liquid filling port 11 of the liquid filling cup 10, and the first tube 21 and the second tube 22 are correspondingly sealedly connected to the liquid filling port 11. It can be seen that after the liquid filling cup 10 is evacuated, the electrolyte is directly injected into the liquid filling cup 10 through the second tube 22 without moving the liquid filling needle, which saves steps and is easy to operate, thereby helping to improve production efficiency.

[0039] The battery liquid injection device of the embodiment of the present application solves the problem that the liquid injection device of the prior art has a complex structure, needs to move the liquid injection needle to the position of the liquid injection port 11 after vacuuming to achieve liquid injection, and has cumbersome operation procedures. The battery liquid injection device of the embodiment of the present application combines the vacuuming pipeline and the liquid injection tube 50 through the setting of the sleeve 20, so that after vacuuming the liquid injection cup 10 and confirming that there is no leakage, the electrolyte can be directly injected into the liquid injection cup 10 and the battery 202 without moving the liquid injection needle. While simplifying the device structure, it simplifies the liquid injection process, is easy to operate, saves time, and can effectively improve production efficiency.

[0040] As a feasible manner, a clamping portion is provided on the outer wall of the first tube 21 , a matching portion is provided on the liquid injection port 11 , the sleeve 20 is plug-fitted with the liquid injection port 11 , and the clamping portion and the matching portion are clamped and fitted.

[0041] The clamping part of this embodiment is mainly used to tightly contact the liquid injection port 11 after the sleeve 20 and the liquid injection tube 50 are plugged together, thereby fixing the position of the sleeve 20 and improving the sealing between the sleeve 20 and the liquid injection port 11.

[0042] Among them, the clamping part can be integrally formed with the first tube 21. Of course, the clamping part can also be a structure that is secondary processed on the first tube 21. The clamping part can be but is not limited to a protruding structure arranged on the outer wall of the first tube 21 or a flange plate sleeved on the first tube 21, etc. Correspondingly, the matching part can be a recessed structure arranged on the injection port 11 or a flange plate arranged on the injection port 11, etc. The embodiments of the present application do not make specific limitations on this.

[0043] In a preferred embodiment, Figure 3 As shown, the clamping portion includes a boss 23, which is arranged around the outer circumference of the first tube 21 and protrudes from the outer wall of the first tube 21 toward the outer wall away from the first tube 21. The end surface of the liquid injection port 11 is configured as a matching portion, and the boss 23 is clamped on the end surface of the liquid injection port 11.

[0044] The boss 23 in this embodiment has a simple structure and is easy to process, and the end face of the sleeve 20 is configured as a mating part. After the sleeve 20 is plugged into and mated with the liquid injection port 11, the boss 23 is clamped on the end face of the liquid injection port 11 and is in tight contact with the end face of the boss 23, which simplifies the structure and is easy to process. It can reliably fix the position of the sleeve 20 and achieve sealing between the sleeve 20 and the liquid injection port 11.

[0045] In some other embodiments, a sealing gasket may be provided at the connection between the sleeve 20 and the liquid injection port 11, so as to further improve the sealing between the sleeve 20 and the liquid injection port 11; wherein the sealing gasket may be but is not limited to a rubber gasket, a silicone gasket or a metal gasket.

[0046] As an achievable method, Figure 4 As shown, the battery liquid filling device also includes at least two limiting members 24, which are arranged between the first tube 21 and the second tube 22 and are distributed at intervals along the circumference of the second tube 22. The at least two limiting members 24 and the second tube 22 limit each other.

[0047] The limiting member 24 of this embodiment is mainly used to limit the position of the second tube 22, ensuring that the second tube 22 and the first tube 21 remain parallel and are installed inside the first tube 21 without tilting, facilitating installation while ensuring that the second tube 22 is stable without shaking.

[0048] In a specific embodiment, the battery filling device includes two limit members 24, and the limit members 24 can be vertical keys arranged on the inner wall of the first tube 21, the vertical keys are parallel to the axis of the first tube 21, and a limit space is defined between the vertical keys, and the outer wall of the second tube 22 contacts the vertical keys for limit; in some other embodiments, the limit member 24 can also be a groove provided on one of the inner wall of the first tube 21 and the outer wall of the second tube 22, and a protrusion is provided on the other, and the groove and the protrusion cooperate with each other to achieve the limitation of the second tube 22. It can be understood that in other embodiments, the limit members 24 can also be set to three, and the three limit members 24 are distributed at intervals along the circumference of the second tube 22, and are preferably evenly distributed along the circumference to ensure that the limit members 24 are evenly stressed and prevent tilting.

[0049] As an implementable manner, the battery filling device further includes a disturbance component 30 , a partial area of ​​which is located inside the filling cup 10 and is used to increase the flow rate of the electrolyte inside the filling cup 10 .

[0050] The disturbance assembly 30 of this embodiment increases the flow rate of the electrolyte inside the injection cup 10, which helps to speed up the injection of the electrolyte into the battery 202, thereby shortening the injection time and improving the injection efficiency.

[0051] The disturbance component 30 may be, but is not limited to, a stirring rod, a stirring blade or a magnetic bead, etc., and is used to increase the flow rate of the electrolyte by mechanical stirring or magnetic stirring under the action of an external force.

[0052] In some embodiments, Figure 6 As shown, the disturbance component 30 includes a blade 31, which is located inside the liquid filling cup 10. The blade 31 is used to rotate under the driving force of an external force to increase the flow rate of the electrolyte inside the liquid filling cup 10.

[0053] In this embodiment, the blades 31 are provided, and the rotation of the blades 31 drives the electrolyte to flow, thereby increasing the flow rate of the electrolyte, thereby enabling the electrolyte to be quickly injected into the battery 202 .

[0054] The blade 31 may be in various shapes, such as but not limited to arc or rectangle, etc. Figure 6 As shown, the liquid injection cup 10 also has a liquid outlet 12. In a preferred embodiment, the blade 31 can also be inclined, inclined from the liquid injection port 11 to the liquid outlet 12, forming an inverted triangle as a whole, which is conducive to the electrolyte flowing out of the liquid outlet 12.

[0055] In some embodiments, the blades 31 include at least two blades 31 , and the at least two blades 31 are arranged at intervals.

[0056] The number of blades 31 in this embodiment is conducive to further increasing the flow rate of the electrolyte.

[0057] In a preferred embodiment, reference Figure 2 and Figure 6 As shown, the blades 31 are distributed in a spiral pattern from the liquid injection port 11 to the liquid outlet 12 .

[0058] In the embodiment of the present application, the blades 31 are distributed in a spiral manner from the injection port 11 to the liquid outlet 12, which is beneficial for the electrolyte to flow along the spiral direction of the blades 31 during the rotation of the blades 31, thereby further accelerating the flow of the electrolyte and facilitating the rapid injection of the electrolyte into the battery 202.

[0059] In some embodiments, the disturbance component 30 further includes a driving motor 33 and a transmission shaft 32 drivingly connected to the driving motor 33 . The driving motor 33 is located outside the liquid injection cup 10 , and the transmission shaft 32 passes through the liquid injection cup 10 and is drivingly connected to the blade 31 .

[0060] In this embodiment, by providing a driving motor 33 and a transmission shaft 32, the driving motor 33 drives the transmission shaft 32 to rotate, and the transmission shaft 32 drives the blades 31 to rotate, which is conducive to reliably realizing the rotation of the blades 31, thereby accelerating the flow of the electrolyte.

[0061] Among them, the blades 31 and the transmission shaft 32 can be connected by any connection method, such as but not limited to welding or screwing; in a preferred embodiment, the blades 31 and the transmission shaft 32 are connected in a detachable manner, such as but not limited to snap-on, which is conducive to disassembling the blades 31 and cleaning the blades 31 or the transmission shaft 32.

[0062] For example, a liquid injection port 11 is provided above the side wall of the liquid injection cup 10, and a servo motor can be used as a driving motor 33. The driving shaft of the servo motor is connected to a transmission shaft 32. The transmission shaft 32 passes through the mounting hole on the liquid injection cup 10 and extends into the interior of the liquid injection cup 10 to a position close to the bottom of the liquid injection cup 10. A liquid outlet 12 is provided on the bottom surface of the liquid injection cup 10, and the blades 31 are distributed in a spiral shape along the axial direction of the transmission shaft 32. After the electrolyte is injected into the interior of the liquid injection cup 10 from the liquid injection port 11, it is injected into the interior of the battery 202 from the liquid outlet 12; wherein, the servo motor drives the transmission shaft 32 to drive the blades 31 to rotate at a high speed, so that the electrolyte flows faster and flows into the interior of the battery 202 from the liquid outlet 12 along the spiral direction of the blades 31.

[0063] In some embodiments, a seal 34 is provided at the connection between the transmission shaft 32 and the liquid injection cup 10 .

[0064] The sealing member 34 may be, but is not limited to, a rubber pad, a silicone pad or a metal gasket, etc., and only needs to achieve sealing.

[0065] The seal 34 of this embodiment is mainly used to seal the contact point between the transmission shaft 32 and the liquid filling cup 10 to ensure the sealing of the liquid filling cup 10. It not only prevents the electrolyte in the liquid filling cup 10 from being contaminated by the outside world, but also effectively eliminates the airtightness problem at the liquid filling cup 10 during the vacuum pumping process, and can reliably detect the sealing of the liquid outlet 12 and the electrolyte injection port of the battery 202.

[0066] As an implementable manner, an air extraction pipe 40 is further included. The air extraction pipe 40 is disposed at one end of the sleeve 20 away from the liquid injection port 11 , and the air extraction pipe 40 is in sealed communication with the first tube 21 .

[0067] The exhaust pipe 40 of this embodiment is used, on the one hand, to extract the air inside the filling cup 10, so as to detect the sealing of the connection between the liquid outlet 12 of the filling cup 10 and the electrolyte injection port of the battery 202; on the other hand, gas can also be filled into the filling cup 10 through the exhaust pipe 40 to increase the pressure inside the filling cup 10, thereby increasing the pressure difference between the filling cup 10 and the battery 202, which is beneficial to the injection of electrolyte into the battery 202.

[0068] In some embodiments, an injection tube 50 is further included. The injection tube 50 is disposed at one end of the sleeve 20 away from the injection port 11 , and the injection tube 50 is connected to the second tube 22 .

[0069] As an achievable manner, a pressurizing member is also included, and the pressurizing member is used to increase the pressure inside the liquid filling cup 10.

[0070] The pressurizing member in this embodiment is helpful to increase the pressure inside the liquid filling cup 10 so that the electrolyte can be quickly injected into the battery 202 .

[0071] Among them, the booster can be but is not limited to an inflation pipeline connected to the interior of the filling cup 10, which increases the pressure inside the filling tube 50 by inflating air into the filling cup 10; of course, the booster can also be a heating wire arranged inside the filling cup 10, which increases the pressure inside the filling cup 10 by increasing the temperature of the electrolyte within a range that does not affect the components of the electrolyte.

[0072] In summary, the battery liquid filling device of the embodiment of the present application combines the vacuum pipeline and the liquid filling pipe 50 through the arrangement of the sleeve 20, so that after the liquid filling cup 10 is vacuumed, the electrolyte can be directly injected into the liquid filling cup 10 without moving the liquid filling needle, which simplifies the device structure and the liquid filling process, is easy to operate, saves time, and can effectively improve production efficiency;

[0073] Furthermore, by providing the disturbance component 30 , the flow rate of the electrolyte is increased, which is beneficial to further accelerate the speed of injecting the electrolyte into the battery 202 , thereby improving the overall production efficiency.

[0074] In a second aspect, an embodiment of the present application provides a battery injection system 200, such as Figure 4 and Figure 5 As shown, it includes a battery 202 and the battery liquid filling device 100 of the first aspect;

[0075] The battery 202 has an electrolyte injection port, which is sealed and connected to the electrolyte outlet 12 .

[0076] It is understandable that the battery injection system 200 has all the features and advantages of the above-mentioned battery injection device, which will not be repeated here. In short, the battery injection system of the embodiment of the present application has the advantages of simple structure, simple operation, fewer operating procedures, and convenient use, and can reliably inject electrolyte into the battery 202 to improve production efficiency.

[0077] It can also be understood that, in order to facilitate the placement of the battery 202 , the battery filling system further includes a bracket 201 , and the battery filling device and the battery 202 are mounted on the bracket 201 .

[0078] As a feasible method, a vacuum pump is also included, which is connected to the exhaust pipe 40 and is used to evacuate the liquid filling cup 10 and the battery 202 .

[0079] The vacuum pump of this embodiment is helpful in extracting the air inside the liquid filling cup 10 and the battery 202, so that the liquid filling cup 10 and the battery 202 are in a vacuum state, and then the air tightness of the connection between the liquid outlet 12 of the liquid filling cup 10 and the electrolyte injection port of the battery 202 can be reliably detected.

[0080] In some embodiments, an inert gas storage device is further included. The inert gas storage device is connected to the gas extraction pipe 40 and is configured as a pressurizing component.

[0081] Among them, the inert gas storage equipment can be a nitrogen tank or an argon tank, etc.;

[0082] The inert gas storage device in this embodiment is conducive to filling the inert gas into the liquid filling cup 10, thereby reliably increasing the internal pressure of the liquid filling cup 10, so that the electrolyte is quickly injected into the battery 202.

[0083] As an implementable manner, an injection pump is further included, the input end of the injection pump is connected to the electrolyte storage device, and the output end of the injection pump is sealed and connected to the second tube 22.

[0084] The provision of the injection pump in this embodiment is conducive to reliably delivering the electrolyte to the inside of the injection cup 10 .

[0085] In summary, the battery filling system of the embodiment of the present application has a simple structure and few operating procedures. There is no need to move the filling probe to the filling port 11 of the filling cup 10 after the vacuuming process is completed. The electrolyte can be directly injected from the filling port 11 after vacuuming; and, by driving the spiral blade 31 to rotate, the flow rate of the electrolyte is increased, and inert gas is filled into the filling cup 10, so that the electrolyte can flow quickly into the battery 202. There is no need for isobaric filling in a static station as required in the prior art, which shortens the filling time and helps to further improve production efficiency.

[0086] The battery liquid injection device of the present utility model is described below through an embodiment.

[0087] like Figure 1-6 As shown, the battery liquid filling device includes a liquid filling cup 10 and a sleeve 20. A liquid filling port 11 is provided near the top of the side wall of the liquid filling cup 10. The sleeve 20 and the liquid filling port 11 are sealed and connected. The sleeve 20 includes a first tube 21 and a second tube 22. An exhaust pipe 40 is also provided at one end of the sleeve 20 away from the liquid filling port 11. One end of the exhaust pipe 40 can be connected to a vacuum pump, and the other end of the exhaust pipe 40 is sealed and connected to the first tube 21. The end of the second tube 22 away from the liquid filling port 11 can be connected to the liquid filling pump, so as to inject electrolyte into the liquid filling cup 10.

[0088] A liquid outlet 12 is provided on the bottom surface of the liquid filling cup 10, and the liquid outlet 12 is sealed and connected to the electrolyte injection port of the battery 202. A servo motor is provided outside the liquid filling cup 10, and a transmission shaft 32 is connected to the driving shaft of the servo motor. The transmission shaft 32 passes through the liquid filling cup 10 from the top of the liquid filling cup 10 and extends into the liquid filling cup 10. Blades 31 are provided inside the liquid filling cup 10, and the blades 31 are spirally distributed along the axial direction of the transmission shaft 32 from the liquid filling port 11 to the liquid outlet 12 and are connected to the transmission shaft 32.

[0089] Before injecting electrolyte into the battery 202, turn on the vacuum pump, evacuate the injection cup 10 and the battery 202, and detect the sealing between the liquid outlet 12 of the injection cup 10 and the electrolyte injection port of the battery 202. After detecting that the sealing is good, open the valve on the injection pump, connect the second tube 22 through the injection pipe 50, and the electrolyte will be injected into the injection cup 10 from the injection port 11. At the same time, turn on the servo motor, and the servo motor drives the transmission shaft 32 to drive the blades 31 to rotate, so that the electrolyte flows along the spirally distributed blades 31 to the liquid outlet 12, and flows into the battery 202 from the electrolyte injection port of the battery 202, so as to inject electrolyte into the battery 202.

[0090] It can be understood that after the electrolyte injection into the battery 202 is completed, the battery 202 can be removed and placed in other workstations to remain stationary, while the next battery 202 is replaced for injection; of course, in actual production, multiple battery injection devices in this application can also be arranged and set up, and injection production lines for multiple batteries 202 can be realized at the same time.

[0091] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate positions or positional relationships are based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0092] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A battery filling device, characterized in that: The battery injection device comprises: A liquid injection cup, wherein the liquid injection cup has a liquid injection port, and the liquid injection port is connected to the interior of the liquid injection cup; The sleeve is sealed and connected to the liquid injection port, and includes a first tube and a second tube sleeved inside the first tube, wherein one of the first tube and the second tube is used to evacuate the interior of the liquid injection cup, and the other is used for the electrolyte to flow into the interior of the liquid injection cup.

2. The battery liquid injection device according to claim 1, characterized in that: A clamping portion is provided on the outer wall of the first tube, a matching portion is provided on the liquid injection port, the sleeve is plug-fitted with the liquid injection port, and the clamping portion is clamped with the matching portion.

3. The battery liquid injection device according to claim 1, characterized in that: It also includes at least two limiting members, which are arranged between the first tube and the second tube and are distributed at intervals along the circumference of the second tube. The at least two limiting members and the second tube limit each other.

4. The battery liquid injection device according to claim 1, characterized in that: It also includes a disturbance component, a partial area of ​​which is located inside the liquid injection cup and is used to increase the flow rate of the electrolyte inside the liquid injection cup.

5. The battery liquid filling device according to claim 4, characterized in that: The disturbance component includes a blade, which is located inside the liquid injection cup and is used to rotate under the driving of an external force to increase the flow rate of the electrolyte inside the liquid injection cup.

6. The battery liquid injection device according to claim 5, characterized in that: The liquid injection cup also has a liquid outlet, and the blades are distributed in a spiral pattern at intervals in a direction from the liquid injection outlet to the liquid outlet.

7. The battery liquid injection device according to claim 5, characterized in that: The disturbance component also includes a driving motor and a transmission shaft drivingly connected to the driving motor. The driving motor is located outside the liquid injection cup, and the transmission shaft passes through the liquid injection cup and is drivingly connected to the blade.

8. The battery liquid filling device according to claim 7, characterized in that: A sealing member is provided at the connection between the transmission shaft and the liquid injection cup.

9. The battery liquid filling device according to any one of claims 1 to 8, characterized in that: It also includes an air extraction pipe, which is arranged at one end of the sleeve away from the liquid injection port, and the air extraction pipe is sealed and connected to the first tube.

10. A battery filling system, characterized in that: It comprises a battery, an injection pump and the battery injection device according to any one of claims 1 to 9, wherein the input end of the injection pump is connected to an electrolyte storage device, and the output end of the injection pump is connected to the second tube.

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