Battery filling equipment

Abstract

The utility model provides a battery liquid filling device, including: a liquid holding mechanism, including a liquid holding cup and a liquid filling movable part, the bottom of the liquid holding cup is provided with a liquid outlet, and the liquid filling movable part can be opened and closed at the liquid outlet; the liquid filling mechanism, including a negative pressure shell, a liquid filling cup and a splash-proof connecting part, the negative pressure shell defines a negative pressure cavity with a bottom opening, the liquid holding cup is arranged outside the negative pressure cavity, the liquid filling cup is arranged in the negative pressure cavity, the liquid filling cup has a liquid inlet and a liquid filling port, the splash-proof connecting part is arranged between the liquid filling cup and the liquid holding cup, and the splash-proof connecting part has a connecting channel connected with the liquid outlet and the liquid inlet respectively; a clamp mechanism, including: a lifting device and a tray clamp, the lifting device can be lifted and arranged at the bottom opening of the negative pressure shell to open or seal the negative pressure cavity, and the tray clamp is constructed to lift the battery so that the liquid filling port extends into the liquid inlet of the battery. The battery liquid filling device of the utility model can avoid splashing when the electrolyte enters the liquid filling cup under negative pressure, and improve the quality of the liquid filling process.

Description

Technical Field

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

[0002] During the battery production process, electrolyte is usually injected into the battery through the liquid injection process. In this liquid process, electrolyte is stored in the liquid holding cup, and the liquid injection port of the liquid holding cup is connected to the liquid injection cup in the negative pressure chamber. At the same time, the negative pressure chamber is pumped with negative pressure, and then the liquid injection port of the liquid holding cup is opened, so that the electrolyte first enters the liquid injection cup under the action of gravity and negative pressure, and then enters the battery, and is quickly absorbed by the battery under negative pressure conditions. Utility Model Content

[0003] In view of the above problems, the utility model provides a battery liquid filling device, which can prevent the electrolyte from splashing when entering the liquid filling cup from the liquid holding cup, avoid battery damage, and improve the quality of the liquid filling process.

[0004] The utility model provides a battery liquid filling device, comprising: a liquid holding mechanism, comprising a liquid holding cup and a liquid filling movable part located in the liquid holding cup, the bottom of the liquid holding cup is provided with a liquid outlet, and the liquid filling movable part can be opened and closed at the liquid outlet; a liquid filling mechanism, comprising a negative pressure shell, a liquid filling cup and a splash-proof connecting piece, the negative pressure shell defines a negative pressure cavity with a bottom opening, the liquid holding cup is arranged outside the negative pressure cavity, the liquid filling cup is arranged in the negative pressure cavity, the liquid filling cup has a liquid inlet and a liquid filling port, the splash-proof connecting piece is arranged between the liquid filling cup and the liquid holding cup, and the splash-proof connecting piece has connecting channels respectively connected with the liquid outlet and the liquid inlet; a clamp mechanism, comprising: a lifting device and a tray clamp, the lifting device can be lifted and arranged at the bottom end opening of the negative pressure shell to open or seal the negative pressure cavity, and the tray clamp is constructed to lift the battery so that the liquid filling port extends into the liquid inlet of the battery.

[0005] In some embodiments, the liquid holding cup is arranged at the top of the negative pressure shell, the top wall of the negative pressure shell is provided with a liquid outlet opposite to and connected to the liquid outlet, the splash-proof connecting piece is arranged at the liquid outlet, the connecting channel is arranged opposite to the liquid outlet, the liquid outlet and the liquid inlet, and the liquid injection movable part passes through the liquid outlet, the liquid outlet, the connecting channel and the liquid inlet in sequence.

[0006] In some embodiments, the splash-proof connector includes: a first connecting segment and a second connecting segment, the first connecting segment and the second connecting segment are sequentially connected along the axial direction of the connecting channel, wherein the diameter of the first connecting segment is larger than the diameter of the second connecting segment, the first connecting segment is sealed with the peripheral edge of the liquid outlet of the negative pressure shell, and the second connecting segment is sealed with the peripheral edge of the liquid inlet of the filling cup.

[0007] In some embodiments, the splash-proof connector includes a transition section, and two ends of the transition section are respectively connected to the first connection section and the second connection section.

[0008] In some embodiments, the battery filling device also includes: a sealing assembly, the sealing assembly includes at least a first sealing member, the inner side of the first sealing member defines a liquid passage, the two ends of the first sealing member are respectively sealed with the splash-proof connecting member and the filling cup, and the liquid passage is connected to the connecting channel, and the liquid filling movable part can also be movably arranged in the liquid passage.

[0009] In some embodiments, two ends of the first sealing member are respectively in contact with the splash-proof connector and the liquid injection cup, and the liquid injection cup exerts a pre-pressure on the first sealing member.

[0010] In some embodiments, the splash-proof connector is a metal part; and / or the first sealing part is a plastic part.

[0011] In some embodiments, the liquid holding mechanism further includes: a first driving member and a transmission member, wherein the first driving member is connected to the liquid injection movable member through the transmission member to drive the liquid injection movable member to open or close the liquid outlet.

[0012] In some embodiments, the lifting device includes: a lifting platform and a second driving member, the lifting platform can be raised and lowered to open or seal the bottom opening of the negative pressure shell, and the second driving member is transmission-connected to the lifting platform to drive the lifting platform to rise and fall.

[0013] In some embodiments, a vacuum pipe is provided on the negative pressure shell, and the battery liquid filling equipment also includes a vacuum device, which is connected to the negative pressure chamber through the vacuum pipe; the vacuum device is configured to evacuate the negative pressure chamber to a negative pressure state after the lifting device seals the negative pressure chamber.

[0014] The battery filling device of the utility model, when filling, first transports the battery to be filled to the lifting device through a tray clamp or an external conveying device, and then the lifting device rises, driving the tray clamp to lift the battery to the target height, at this time, the filling port of the filling cup extends into the liquid inlet of the battery, and at the same time the lifting device seals the bottom opening of the negative pressure shell, so that a closed cavity is formed in the negative pressure cavity, and at this time the negative pressure cavity is pumped to negative pressure until the pressure value in the negative pressure cavity reaches -90Kpa, and the pressure drop rate is less than 1Kpa / min. Then the liquid filling movable part is controlled to open the liquid outlet of the liquid holding cup, so that the electrolyte, under the action of gravity and negative pressure, passes through the liquid outlet of the liquid holding cup, the connecting channel of the splash-proof connector and the liquid inlet of the filling cup in sequence, and then enters the battery, and the electrolyte is quickly absorbed by the battery under negative pressure conditions.

[0015] In the battery liquid filling device of the utility model, during the battery liquid filling process, there is a pressure difference between one side of the liquid filling cup and one side of the liquid holding cup, so that the liquid holding cup enters the liquid filling cup from the liquid holding cup under the action of negative pressure and gravity, and then enters the battery. Among them, since a splash-proof connector is provided between the liquid holding cup of the liquid holding mechanism and the liquid filling cup of the liquid filling mechanism, the flow sealing between the liquid outlet of the liquid holding cup and the liquid inlet of the liquid filling cup can be improved, and splashing of the electrolyte when the electrolyte flows into the liquid filling cup at an accelerated speed under the action of negative pressure, resulting in electrolyte waste, and battery damage can be avoided, thereby improving the quality of the liquid filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the battery liquid filling device in some embodiments of the utility model;

[0018] Figure 2 It is a schematic structural diagram of the splash-proof connector of some embodiments of the utility model.

[0019] Description of reference numerals:

[0020] 100-Battery filling equipment;

[0021] 1-liquid holding mechanism; 11-liquid holding cup; 12-liquid injection movable member; 13-first driving member; 14-transmission member;

[0022] 2-liquid injection mechanism; 21-negative pressure housing; 22-liquid injection cup; 23-splash-proof connector; 231-first connecting section; 232-second connecting section; 233-transition section; 234-connecting channel; 24-vacuum pipe; 25-observation window;

[0023] 3-clamp mechanism; 31-lifting device; 311-lifting platform; 312-second driving member; 33-tray clamp; 34-third driving member;

[0024] 41-first sealing member; 42-second sealing member; 43-third sealing member; 44-fourth sealing member;

[0025] 5-injection needle; 200-battery. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0027] In the prior art, in the process of the electrolyte entering the filling cup from the liquid holding cup, it is easily affected by the degree of negative pressure, causing different degrees of electrolyte splashing (the higher the negative pressure value, the greater the flow rate of the electrolyte entering the filling cup container, and the more electrolyte splashing), resulting in reduced filling efficiency and quality, as well as waste of electrolyte.

[0028] Combination Figure 1 and Figure 2 The battery liquid injection device 100 of this embodiment can inject electrolyte into the battery 200 during the production process of the battery 200. The battery 200 includes a shell, and one end of the shell has an opening, which constitutes a liquid inlet of the battery 200.

[0029] The battery liquid filling device 100 may include: a liquid holding mechanism 1 , a liquid filling mechanism 2 and a clamp mechanism 3 .

[0030] The liquid holding mechanism 1 may include a liquid holding cup 11 and a liquid injection movable part 12. The liquid holding cup 11 is used as a storage container for the electrolyte. During the production process, the electrolyte is stored in the liquid holding cup 11 and the electrolyte is supplied to the battery 200. The liquid injection movable part 12 is arranged in the liquid holding cup 11. A liquid outlet is arranged at the bottom of the liquid holding cup 11, and the liquid injection movable part 12 can be opened and closed at the liquid outlet. For example, the liquid injection movable part 12 can move relative to the liquid holding cup 11 to open or close the liquid outlet. The liquid injection movable part 12 can be a rod-shaped, block-shaped or other structural part that acts as a valve body to achieve the opening and closing control of the liquid outlet.

[0031] Optionally, in order to better achieve flow diversion, a liquid outlet channel may be provided at the bottom of the liquid holding cup 11, and the liquid outlet may be located at the bottom end of the liquid outlet channel. At this time, the liquid injection movable part 12 may move in the liquid holding cup 11 along the extension direction of the liquid storage channel to open or close the liquid outlet, and the liquid injection movable part 12 may be constructed to be movable by itself, or may be constructed to be movable under the drive of an external driving device.

[0032] The injection mechanism 2 may include a negative pressure shell 21 , an injection cup 22 and a splash-proof connector 23 . The negative pressure shell 21 defines a negative pressure cavity with an opening at the bottom end, that is, the negative pressure shell 21 can provide a negative pressure injection environment for the battery 200 .

[0033] As the liquid injection process continues, the electrolyte in the liquid holding cup 11 will gradually decrease. In order to facilitate the external liquid supply device to replenish the electrolyte into the liquid holding cup 11, the liquid holding cup 11 can be arranged outside the negative pressure chamber, and the liquid injection cup 22 is arranged in the negative pressure chamber to prevent the liquid holding cup 11 from interfering with the liquid injection cup 22 injecting liquid into the battery 200. At the same time, a pressure difference can also be formed between the liquid injection cup 22 and the liquid injection cup 22, so that the electrolyte in the liquid holding cup 11 can more easily enter the liquid injection cup 22 using negative pressure and gravity.

[0034] The liquid injection cup 22 has a liquid inlet and a liquid injection port. The electrolyte in the liquid holding cup 11 enters the liquid injection cup 22 from the liquid inlet, and the electrolyte in the liquid injection cup 22 is injected into the battery 200 from the liquid injection port. The splash-proof connector 23 is disposed between the liquid injection cup 22 and the liquid holding cup 11. For example, the splash-proof connector 23 is disposed in the negative pressure chamber and on the top wall of the negative pressure housing 21. The splash-proof connector 23 has a connecting channel 234. The two ends of the connecting channel 234 are respectively connected to the liquid outlet and the liquid inlet, that is, the liquid holding cup 11 and the liquid injection cup 22 are connected through the splash-proof connector 23.

[0035] The clamp mechanism 3 may include: a lifting device 31 and a tray clamp 33. The lifting device 31 is arranged at the bottom opening of the negative pressure housing 21 in a lifting manner to open or seal the negative pressure cavity. The tray clamp 33 serves as a carrier of the battery 200 during the liquid injection process. The tray clamp 33 can lift the battery 200. The tray clamp 33 is arranged on the lifting device 31. The tray clamp 33 can be lifted and lowered with the lifting device 31. In this way, the battery 200 can be lifted to a target height so that the liquid injection port of the liquid injection cup 22 extends into the liquid inlet of the battery 200 to complete the liquid injection. Optionally, according to the different setting heights of the filling cup 22, the tray clamp 33 can be raised and lowered relative to the lifting device 31. For example, a third driving member 34 can be set at the bottom of the tray clamp 33. The third driving member 34 can be one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder to drive the tray clamp 33 to be raised and lowered relative to the lifting device 31. In this way, after the tray clamp 33 reaches the bottom opening of the negative pressure shell 21 with the lifting device 31, the third driving member 34 can continue to drive the tray clamp 33 to rise relative to the lifting device 31, so as to lift the battery 200 to the target filling position and dock with the filling port of the filling cup 22.

[0036] The tray fixture 33 can move relative to the lifting device 31 to realize the transportation of the battery 200. For example, the battery 200 to be injected is transferred to the lifting device 31 to facilitate injection of the battery 200, and then the injected battery 200 is transferred to the next production process.

[0037] The working principle of the battery filling device 100 of this embodiment is as follows: first, the battery 200 to be filled is transported to the lifting device 31 through the tray clamp 33 or the external conveying device, and then the lifting device 31 rises, driving the tray clamp 33 to lift the battery 200 to the target height. At this time, the filling port of the filling cup 22 extends into the liquid inlet of the battery 200. At the same time, the lifting device 31 seals the bottom opening of the negative pressure shell 21 to form a closed cavity in the negative pressure cavity. At this time, the negative pressure cavity is pumped to negative pressure until the pressure value in the negative pressure cavity reaches -90Kpa, and the pressure drop rate is less than 1Kpa / min. Then, the liquid injection movable part 12 is controlled to open the liquid outlet of the liquid holding cup 11, so that the electrolyte, under the action of gravity and negative pressure, passes through the liquid outlet of the liquid holding cup 11, the connecting channel 234 of the splash-proof connecting part 23 and the liquid inlet of the liquid injection cup 22 in sequence and enters the liquid injection cup 22, and then enters the interior of the battery 200, and the electrolyte is quickly absorbed by the battery 200 under negative pressure conditions.

[0038] Among them, in the above process, since a splash-proof connector 23 is provided between the liquid holding cup 11 and the liquid injection cup 22, its connecting channel 234 can better connect the liquid outlet of the liquid holding cup 11 and the liquid inlet of the liquid injection cup 22 to avoid splashing of the electrolyte due to the increase in flow rate caused by the negative pressure value.

[0039] According to the battery liquid filling device 100 of the embodiment of the utility model, during the liquid filling process of the battery 200, there is a pressure difference between one side of the liquid filling cup 22 and one side of the liquid holding cup 11, so that the liquid holding cup 11 enters the liquid filling cup 22 from the liquid holding cup 11 under the action of negative pressure and gravity, and then enters the inside of the battery 200. Among them, since the splash-proof connecting member 23 is provided between the liquid holding cup 11 of the liquid holding mechanism 1 and the liquid filling cup 22 of the liquid filling mechanism 2, the flow sealing between the liquid outlet of the liquid holding cup 11 and the liquid inlet of the liquid filling cup 22 can be improved, and the splashing of the electrolyte when the electrolyte flows into the liquid filling cup 22 at an accelerated speed under the action of negative pressure, resulting in a waste of electrolyte, and the battery 200 can also be prevented from being damaged, thereby improving the quality of the liquid filling process.

[0040] In some embodiments, reference Figure 1 The battery filling device 100 may further include a filling needle 5 , which may be disposed on the upper side of the liquid holding cup 11 , and is used to replenish electrolyte into the liquid holding cup 11 .

[0041] In some embodiments, reference Figure 1 , the liquid holding cup 11 is arranged on the top of the negative pressure shell 21, the top wall of the negative pressure shell 21 is provided with a liquid outlet opposite to and connected with the liquid outlet, the splash-proof connecting piece 23 is arranged at the liquid outlet, the connecting channel 234 is arranged opposite to the liquid outlet, the liquid outlet and the liquid inlet, and the liquid injection movable part 12 passes through the liquid outlet, the liquid outlet, the connecting channel 234 and the liquid inlet in sequence. In this way, the liquid injection movable part 12 can simultaneously realize the sealing of the liquid outlet, the liquid outlet, the connecting channel 234 and the liquid inlet, and compared with the solution of only sealing the liquid outlet of the liquid holding cup 11, the sealing of the flow path between the liquid holding cup 11 and the liquid injection cup 22 can be improved. Optionally, the peripheral edge of the liquid outlet of the liquid holding cup 11 can be inserted into the liquid outlet to improve the sealing between the liquid holding cup 11 and the negative pressure shell 21.

[0042] In some embodiments, reference Figure 2 The splash-proof connector 23 may include: a first connecting section 231 and a second connecting section 232. The first connecting section 231 and the second connecting section 232 are sequentially connected along the axial direction of the connecting channel 234, the first connecting section 231 is sealed with the periphery of the liquid outlet of the negative pressure housing 21, and the second connecting section 232 is sealed with the periphery of the liquid inlet of the liquid injection cup 22, so that splashing of the electrolyte can be prevented when the electrolyte passes through the negative pressure housing 21 and enters the liquid injection cup 22.

[0043] Optionally, the first connecting section 231 can be fixedly connected to the negative pressure shell 21, such as by bolting, bonding, welding, etc., to ensure the installation stability of the splash-proof connector 23 on the negative pressure shell 21, which is beneficial to improving the fitting sealing between the connecting channel 234 of the splash-proof connector 23 and the liquid outlet.

[0044] The diameter of the first connecting section 231 is greater than the diameter of the second connecting section 232 , so that different parts of the splash-proof connector 23 can be more compatible with the size of the structure that cooperates with it, thereby reducing material costs.

[0045] In some embodiments, reference Figure 2 The splash-proof connector 23 may further include a transition section 233, the two ends of which are respectively connected to the first connection section 231 and the second connection section 232. In this way, the size of the transition section 233 can be reduced by using the first connection section 231 to seal with the negative pressure housing 21 and the second connection section 232 to seal with the liquid injection cup 22, which is conducive to reducing the material cost and weight of the splash-proof connector 23. It can be understood that the connecting channel 234 sequentially passes through the first connection section 231, the transition section 233 and the second connection section 232.

[0046] In some embodiments, the battery filling device 100 may further include a sealing component. The sealing component is used to improve the sealing of the electrolyte flow path of the battery filling device 100 and prevent the electrolyte from leaking out. Specifically, the sealing component may include at least a first sealing member 41. The first sealing member 41 may be in the shape of a tube with both ends passed through, and the inner side of the first sealing member 41 defines a liquid passage, and the two ends of the first sealing member 41 are respectively sealed with the splash-proof connector 23 and the filling cup 22, and the liquid passage is connected to the connecting channel 234, and the liquid filling movable part 12 can also be movably arranged in the liquid passage. In this way, by providing the first sealing member 41, the sealing performance between the splash-proof connector 23 and the filling cup 22 can be improved, and the electrolyte can be prevented from splashing or seeping out from the gap between the splash-proof connector 23 and the filling cup 22.

[0047] In some embodiments, reference Figure 1 The two ends of the first seal 41 are respectively abutted against the splash-proof connector 23 and the liquid filling cup 22, and the liquid filling cup 22 has a pre-pressure on the first seal 41. For example, the first end face of the first seal 41 is abutted against the end of the second connecting section 232 of the splash-proof connector 23 away from the first connecting section 231, and the second end face of the first seal 41 is abutted against the peripheral edge of the liquid inlet of the liquid filling cup 22, and the first seal 41 is subjected to a certain extrusion force. In this way, the first seal 41 is sealed with the splash-proof connector 23 and the liquid filling cup 22 respectively by end face sealing. The sealing method is simple and reliable and easy to assemble. In addition, compared with the sealing plug sealing method, it can reduce the dust caused by the friction of the first seal 41, reduce the quality risk of dust contaminating the electrolyte, and reduce the frequency of replacement of the first seal 41.

[0048] Considering that the first seal 41 cooperates with the splash-proof connector 23 and the liquid injection cup 22 only by surface contact, there is a possibility that the first seal 41 may fall off from between the splash-proof connector 23 and the liquid injection cup 22 due to large deformation under force. To avoid this situation, in this embodiment, a positioning structure can be respectively provided on the end surface of the splash-proof connector 23 and the liquid injection cup 22 facing the splash-proof connector 23, and accordingly, the two end surfaces of the splash-proof connector 23 are respectively provided with a positioning matching structure, for example, the positioning structure can be a positioning groove or a positioning protrusion, and the positioning matching structure can be a positioning protrusion or a positioning groove matched with the positioning structure. By interlocking the positioning structure and the positioning matching structure, the installation stability of the first seal 41 can be improved, thereby preventing the electrolyte from splashing out from the gap between the transition connector and the first seal 41, and the gap between the first seal 41 and the liquid injection cup 22.

[0049] In addition, the two ends of the first sealing member 41 may be nested with the splash-proof connector 23 and the liquid injection cup 22 to further improve the sealing performance of the electrode liquid flow path.

[0050] In some embodiments, the splash-proof connector 23 is a metal part, so that the structural stability of the splash-proof connector 23 is high. Preferably, the splash-proof connector 23 is an aluminum profile, so that the splash-proof connector 23 has high strength, light weight and certain corrosion resistance.

[0051] In some embodiments, the first sealing member 41 is a plastic member, such as a plastic member or a rubber member. In this way, the first sealing member 41 has a certain plastic deformation ability, can achieve a high degree of sealing with a certain pre-pressure, thereby preventing the electrolyte from splashing, and is easy to assemble and has a low cost. Preferably, the first sealing member 41 can be EPDM rubber, so that the first sealing member 41 can have a high corrosion resistance to resist electrolyte corrosion.

[0052] In some embodiments, reference Figure 1 The sealing assembly may further include: a second sealing member 42. Specifically, the second sealing member 42 may be disposed at the liquid outlet of the liquid holding cup 11 to improve the sealing performance between the liquid outlet of the liquid holding cup 11 and the negative pressure housing 21.

[0053] In some embodiments, the sealing assembly may further include: a third sealing member 43. Specifically, the third sealing member 43 may be disposed around the liquid injection port of the liquid injection cup 22 to improve the sealing performance between the liquid injection cup 22 and the liquid inlet of the battery 200, and to prevent splashing when the electrolyte enters the battery 200 from the liquid injection cup 22.

[0054] In some embodiments, reference Figure 1The liquid holding mechanism 1 may further include: a first driving member 13 and a transmission member 14. The first driving member 13 may be any one of a hydraulic cylinder, a gas cylinder, and an electric cylinder, and the transmission member 14 may be a transmission connecting rod. The first driving member 13 is connected to the liquid injection movable member 12 through the transmission member 14 to drive the liquid injection movable member 12 to open or close the liquid outlet. For example, the liquid injection movable member 12 is inserted into the liquid holding cup 11, the top of the liquid injection movable member 12 is connected to the transmission member 14, and the free end of the piston of the first driving member 13 is connected to the transmission member 14. When the piston of the first driving member 13 is extended, the transmission member 14 drives the liquid injection movable member 12 to rise, so that the liquid outlet of the liquid holding cup 11 is opened, and the electrolyte can flow into the liquid injection cup 22; when the piston of the first driving member 13 is retracted, the transmission member 14 drives the liquid injection movable member 12 to descend, so that the liquid outlet of the liquid holding cup 11 is closed, and the electrolyte stops flowing into the liquid injection cup 22. In this way, the liquid injection movable member 12 can realize opening and closing of the liquid outlet under the drive of the first driving member 13 and the transmission member 14, and the implementation method is relatively simple and the reliability is relatively high.

[0055] Optionally, the battery filling device 100 may further include a frame, on which the first driving member 13 of the liquid holding mechanism 1 and the liquid holding cup 11 may be disposed, and similarly, the negative pressure housing 21 of the liquid filling structure may also be disposed on the frame. In this way, the frame can provide a reliable support for the installation platform of each component of the battery filling device 100.

[0056] In some embodiments, reference Figure 1 The lifting device 31 may include a lifting platform 311 and a second driving member 312. The second driving member 312 may be any one of a hydraulic cylinder, a pneumatic cylinder, and an electric cylinder. The lifting platform 311 is adapted to the bottom opening of the negative pressure shell 21, and the lifting platform 311 can be raised and lowered to open or seal the bottom opening of the negative pressure shell 21. The second driving member 312 is transmission-connected to the lifting platform 311 to drive the lifting platform 311 to be raised and lowered. In this way, the structure of the lifting device 31 is relatively simple and easy to implement, and the lifting device 31 can also increase the sealing pressure between the first sealing ring and the liquid injection cup 22 to a certain extent.

[0057] Optionally, refer to Figure 1 The sealing assembly may further include a fourth sealing member 44 , which is disposed at one of the lifting platform 311 and the negative pressure shell 21 . When the lifting platform 311 seals the negative pressure shell 21 , the fourth sealing member 44 is clamped between the lifting platform 311 and the negative pressure shell 21 .

[0058] Optionally, the second seal 42 is a plastic part, such as a plastic part or a rubber part; the third seal 43 is a plastic part, such as a plastic part or a rubber part; the fourth seal 44 is a plastic part or a rubber part. The second seal 42, the third seal 43, and the fourth seal 44 can be made of the same material as the first seal 41, for example, all of which are made of EPDM rubber; of course, they can also be different.

[0059] refer to Figure 1 In some embodiments, a vacuum pipe 24 may be provided on the negative pressure housing 21, and the battery filling device 100 further includes a vacuum device, which is connected to the negative pressure chamber through the vacuum pipe 24. The vacuum device is configured to pump the negative pressure chamber to a negative pressure state after the lifting device 31 seals the negative pressure chamber. In this way, the electrolyte in the liquid holding cup 11 can flow into the filling cup 22 at a certain speed under the action of negative pressure and gravity, and finally be injected into the battery 200.

[0060] Optionally, when the vacuum device evacuates the negative pressure chamber to a negative pressure, the pressure drop rate in the negative pressure chamber is less than 1 Kpa / min, and the vacuum device stops running until the pressure value in the negative pressure chamber reaches -90 Kpa.

[0061] In some embodiments, reference Figure 1 An observation window 25 may be provided on the negative pressure housing 21, so that the operator can conveniently observe the injection condition in the negative pressure chamber and take corresponding measures.

[0062] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0063] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0064] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0065] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery filling device, characterized in that: include: The liquid holding mechanism comprises a liquid holding cup and a liquid injection movable part located in the liquid holding cup, wherein a liquid outlet is provided at the bottom of the liquid holding cup, and the liquid injection movable part is openably and closably arranged at the liquid outlet; The liquid injection mechanism comprises a negative pressure shell, a liquid injection cup and a splash-proof connecting piece, wherein the negative pressure shell defines a negative pressure cavity with an opening at the bottom end, the liquid holding cup is arranged outside the negative pressure cavity, the liquid injection cup is arranged inside the negative pressure cavity, the liquid injection cup has a liquid inlet and a liquid injection port, the splash-proof connecting piece is arranged between the liquid injection cup and the liquid holding cup, and the splash-proof connecting piece has connecting channels respectively connected to the liquid outlet and the liquid inlet; The clamp mechanism includes: a lifting device and a tray clamp, wherein the lifting device can be lifted and lowered at the bottom opening of the negative pressure shell to open or seal the negative pressure cavity, and the tray clamp is constructed to lift the battery so that the liquid injection port extends into the liquid inlet of the battery.

2. The battery filling device according to claim 1, characterized in that: The liquid holding cup is arranged on the top of the negative pressure housing, and the top wall of the negative pressure housing is provided with a liquid outlet opposite to and connected with the liquid outlet. The splash-proof connection piece is arranged at the liquid outlet, and the connection channel is arranged opposite to the liquid outlet, the liquid outlet and the liquid inlet. The liquid injection movable part passes through the liquid outlet, the liquid passage, the connecting channel and the liquid inlet in sequence.

3. The battery filling device according to claim 2, characterized in that: The splash-proof connecting piece comprises: a first connecting section and a second connecting section, wherein the first connecting section and the second connecting section are connected in sequence along the axial direction of the connecting channel. The diameter of the first connecting section is greater than the diameter of the second connecting section, the first connecting section is sealed with the periphery of the liquid outlet of the negative pressure shell, and the second connecting section is sealed with the periphery of the liquid inlet of the injection cup.

4. The battery filling device according to claim 3, characterized in that: The splash-proof connecting piece includes a transition section, and two ends of the transition section are respectively connected to the first connecting section and the second connecting section.

5. The battery filling device according to claim 3, characterized in that: Also includes: A sealing assembly, the sealing assembly comprising at least a first sealing member, The inner side of the first sealing member defines a liquid passage, and the two ends of the first sealing member are respectively sealed with the splash-proof connecting member and the liquid filling cup, and the liquid passage is connected to the connecting channel. The liquid injection movable member can also be movably arranged in the liquid passage.

6. The battery filling device according to claim 5, characterized in that: Two ends of the first sealing member are respectively in contact with the splash-proof connecting member and the liquid injection cup, and the liquid injection cup exerts a pre-pressure on the first sealing member.

7. The battery filling device according to claim 6, characterized in that: The splash-proof connecting piece is a metal piece; and / or the first sealing piece is a plastic piece.

8. The battery liquid filling device according to any one of claims 1 to 7, characterized in that: The liquid holding mechanism further includes: a first driving member and a transmission member, wherein the first driving member is connected to the liquid injection movable member through the transmission member to drive the liquid injection movable member to open or close the liquid outlet.

9. The battery liquid filling device according to any one of claims 1 to 7, characterized in that: The lifting device comprises: a lifting platform and a second driving member, the lifting platform can be lifted and lowered to open or seal the bottom opening of the negative pressure shell, and the second driving member is transmission-connected to the lifting platform to drive the lifting platform to lift and lower.

10. The battery liquid filling device according to any one of claims 1 to 7, characterized in that: The negative pressure housing is provided with a vacuum pipe, and the battery liquid injection equipment further comprises a vacuum device, and the vacuum device is connected to the negative pressure chamber through the vacuum pipe; The vacuum device is configured to evacuate the negative pressure chamber to a negative pressure state after the lifting device seals the negative pressure chamber.

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