Liquid injection device of battery

Abstract

The utility model relates to the related technical field of batteries, and provides a liquid injection device of a battery. The liquid injection device comprises a standing cavity used for placing a battery and provided with a liquid injection through hole and an exhaust hole; the liquid injection mechanism is arranged above the standing cavity, the liquid injection mechanism is provided with a scavenging port and a liquid injection outlet, and the liquid injection outlet is connected with the liquid injection through hole; and the gas circuit pipeline is used for communicating the scavenging port and the exhaust hole of the liquid injection mechanism, a branch gas pipe communicated with the outside is further arranged on the gas circuit pipeline, and a gas valve is arranged on the branch gas pipe. According to the liquid injection device based on the battery, free selection of two liquid injection modes of isobaric liquid injection or differential pressure liquid injection can be carried out according to actual needs, on the other hand, the branch air pipes can be utilized to synchronously carry out vacuumizing treatment on the standing cavity and the liquid injection mechanism, the vacuumizing process is simplified, and the operation efficiency is improved.

Description

Technical Field

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

[0002] In the related art, the liquid injection and static chamber equipment is mostly a bell-shaped static chamber. Since the bell-shaped static chamber adopts a built-in liquid injection mechanism, its liquid injection method is single. When the liquid injection device adopts isobaric liquid injection, the liquid injection mechanism and the static chamber need to be evacuated separately, and the operation process is relatively cumbersome. In addition, since the bell-shaped static chamber is for synchronous static treatment of multiple battery cells, it is not only large in size, low in space utilization, and requires a large medium flow rate, but also leads to problems such as long positive and negative pressure cycle auxiliary time and increased energy consumption. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a battery injection device, which is used to solve the technical problems existing in the prior art that the injection method of the injection device is single and the operation is complicated when vacuuming the device.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] The present application provides a battery injection device, characterized in that the injection device comprises:

[0006] The static cavity is used to place the battery and is provided with a liquid injection hole and an exhaust hole;

[0007] A liquid injection mechanism, the liquid injection mechanism is arranged above the static cavity, wherein the liquid injection mechanism is provided with a ventilation port and a liquid injection outlet, and the liquid injection outlet is connected to the liquid injection through hole;

[0008] The air pipeline is used to connect the ventilation port of the injection mechanism with the exhaust hole, wherein the air pipeline is also provided with a branch air pipe connected to the outside, and the branch air pipe is provided with an air valve.

[0009] In the above technical solution, a battery injection device is provided, which can freely select between isobaric injection and differential pressure injection according to actual needs. On the other hand, the branch air pipe can be used to synchronously vacuum the static cavity and the injection mechanism, which simplifies the vacuuming process and improves operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 is a schematic diagram of the overall structure of a liquid injection device according to an exemplary embodiment;

[0012] Figure 2 is an exploded view of a stationary cavity according to an exemplary embodiment;

[0013] Figure 3 is a schematic diagram showing the connection between an air pipeline and a liquid injection mechanism according to an exemplary embodiment;

[0014] Figure 4 is a schematic diagram of a guide drive mechanism according to an exemplary embodiment.

[0015] In the figure: 10, static cavity; 101, upper cavity; 1011, exhaust hole; 1012, injection hole; 1013, first positioning hole; 102, lower cavity; 1021, second positioning hole; 20, single battery; 30, gas pipeline; 301, branch gas pipe; 302, gas valve; 40, injection mechanism; 401, buffer cup; 4011, injection outlet; 4012, ventilation port; 402, injection pipeline; 403, injection nozzle; 404, injection valve; 50, guide drive mechanism; 501, guide column; 502, hydraulic assembly; 503, sliding base; 504, slide rail; 505, baffle; 506, top seat; 60, positioning pin; 701, support plate; 702, elastic member; 703, splint. DETAILED DESCRIPTION

[0016] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0017] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0018] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0019] In the related art, the liquid injection and static equipment is mostly a bell-shaped static chamber. Since the bell-shaped static chamber adopts a built-in liquid injection mechanism, its liquid injection method is single. When the liquid injection device adopts isobaric liquid injection, the liquid injection mechanism and the static chamber need to be evacuated separately, which is cumbersome to operate. In addition, since the bell-shaped static chamber is for synchronous static treatment of multiple battery cells, the volume required for the liquid injection device is relatively large, which leads to a long positive and negative pressure cycle auxiliary time, a large medium flow rate, high energy consumption, and high noise during pressurization and pressure relief. Although the bell-shaped static chamber is large in size, its space utilization rate is low, and it has the disadvantages of large floor space, long production cycle, high cost, and heavy weight.

[0020] The present application provides a battery injection device, which adopts a design mode that the injection mechanism is placed outside the static cavity, and the injection mechanism is connected to the static cavity through a corresponding connecting pipeline. The injection device can freely choose between two injection modes of equal pressure injection and differential pressure injection according to actual needs, and on the other hand, it can also use a branch air pipe to synchronously vacuum the static cavity and the injection mechanism, which simplifies the vacuuming process and improves the operating efficiency.

[0021] The technical solution of this embodiment is described in detail below in conjunction with the accompanying drawings. The following embodiments and implementation methods can be combined with each other if there is no conflict.

[0022] In an exemplary embodiment of the present utility model, a battery injection device is provided, such as Figure 1 As shown, Figure 1 1 is a schematic diagram of the overall structure of a liquid injection device according to an exemplary embodiment. The liquid injection device comprises: a stationary cavity 10, a liquid injection mechanism 40, and an air pipeline 30, etc.

[0023] like Figure 1-3 As shown, the static cavity 10 is used to place the battery, and a liquid injection hole 1012 and an exhaust hole 1011 are provided on the top of the static cavity 10; the liquid injection mechanism 40 is arranged above the static cavity 10, wherein the liquid injection outlet 4011 at the bottom of the liquid injection mechanism 40 is connected to the liquid injection hole 1012; the air circuit pipeline 30 is used to connect the ventilation port 4012 at the top of the liquid injection mechanism 40 and the exhaust hole 1011 at the top of the static cavity 10, wherein the air circuit pipeline 30 is also provided with a branch air pipe 301 connected to the outside, and the branch air pipe 301 is provided with an air valve 302.

[0024] In this exemplary embodiment, the liquid injection device of the battery adopts the method of placing the liquid injection mechanism 40 outside the static cavity 10, and communicating the liquid injection outlet 4011 of the liquid injection mechanism 40 with the liquid injection through hole 1012 of the static cavity 10, and using the gas pipeline 30 with the branch gas pipe 301 to communicate the ventilation port 4012 of the liquid injection mechanism 40 with the exhaust hole 1011 of the static cavity 10. Among them, when isobaric liquid injection is adopted, the gas valve 302 is opened, and the pressure of the static cavity 10 is equal to the pressure in the liquid injection mechanism 40; when differential pressure liquid injection is adopted, the gas valve 302 is closed, and differential pressure liquid injection is performed by adjusting the pressure of the liquid injection mechanism 40 and the corresponding pipeline. Based on the liquid injection device, on the one hand, the two liquid injection methods of isobaric liquid injection or differential pressure liquid injection can be freely selected according to actual needs, and on the other hand, the branch gas pipe 301 can be used to synchronously vacuum the static cavity 10 and the liquid injection mechanism 40, which simplifies the vacuum process and improves the operation efficiency.

[0025] In this embodiment, taking into account factors such as the spatial position of the static chamber 10 and the injection mechanism 40 and the smoothness of the connected pipelines, the "position of the exhaust hole 1011 and the injection hole 1012 on the static chamber 10" and the "position of the ventilation port 4012 and the injection outlet 4011 of the injection mechanism 40" are optimized respectively, and the method of "arranging the exhaust hole 1011 and the injection hole 1012 at the top of the static chamber 10, and the ventilation port 4012 at the top of the injection mechanism 40 and the injection outlet 4011 at the bottom" is used as an example to illustrate.

[0026] It can be understood that the ventilation port 4012 and the liquid injection hole 1012 can also be opened on the upper part of the side wall of the static chamber 10, wherein the connection between the ventilation port 4012 and the exhaust hole 1011 is achieved by setting up an air circuit pipeline 30, and the connection between the liquid injection hole 1012 and the liquid injection outlet 4011 can also be achieved by using corresponding pipeline components.

[0027] In some exemplary embodiments, Figure 2 As shown, the static cavity 10 includes: an upper cavity 101 and a lower cavity 102, wherein the upper cavity 101 is provided with a liquid injection through hole 1012 and an exhaust hole 1011. After the battery is filled and static, the static cavity 10 needs to be opened to replace the next battery. The static cavity 10 in this embodiment adopts an upper and lower structure, and the upper cavity 101 and the lower cavity 102 are connected to form a receiving cavity, and the battery can be fixed in the receiving cavity.

[0028] In some exemplary embodiments, Figure 1-Figure 2 As shown, the liquid injection device further includes: a clamp assembly for clamping the battery. To facilitate clamping the battery, the clamp assembly is exemplarily disposed in the lower cavity 102 .

[0029] Considering the different battery sizes, the clamp assembly can be optimized to adapt to various types of battery cells. For example, the clamp assembly is detachably connected to the lower cavity 102. At this time, the injection device is equipped with multiple sets of clamp assemblies, which can be selected and assembled according to the battery size, so as to fix the battery in the static cavity 10.

[0030] In another alternative, the clamping plate 703 on the clamp assembly can also be movably connected to achieve clamping and fixing of batteries of different sizes. Figure 2 As shown, the clamp assembly includes: a support plate 701, and a clamping plate 703 slidably disposed on the support plate 701. When batteries of different sizes are injected and placed in a static state, the position of the clamping plate 703 on the support plate 701 can be adjusted according to actual needs, thereby ensuring that the clamping plate 703 can effectively clamp and fix the battery.

[0031] In some exemplary embodiments, Figure 2 As shown, in order to facilitate the alignment of the battery's liquid injection port with the liquid injection through hole 1012 and avoid deviation between the two during liquid injection, thereby failing to efficiently and accurately inject the electrolyte into the battery for static treatment, this embodiment further optimizes the clamp assembly.

[0032] Exemplarily, the clamp assembly of the liquid injection device further includes: an elastic member 702, which is used to connect the clamp assembly with the lower cavity 102. Based on the design of the elastic member 702, the battery is lifted up in the static cavity 10 to maintain a certain abutment force after the liquid injection port of the battery corresponds to the liquid injection through hole 1012, which is conducive to improving the efficiency of the liquid injection operation process. It should be noted that the number of elastic members 702 and the size of the elastic force can be designed according to actual needs, and will not be repeated here.

[0033] In addition, considering the cost of the elastic member 702 and the convenience of the installation process, illustratively, the elastic member 702 can be a spring, etc., and the elastic force of the spring makes the battery filling port match with the filling through hole 1012 of the static cavity 10.

[0034] In some exemplary embodiments, Figure 4 As shown, the liquid injection device further includes a lifting mechanism for controlling the lifting of the lower cavity 102 to dock / separate with the upper cavity 101. Based on the automatic control of the lifting mechanism, the docking / separation operation of the lower cavity 102 and the upper cavity 101 can be efficiently and conveniently controlled.

[0035] In some exemplary embodiments, Figure 3As shown, the injection mechanism 40 includes: a buffer cup 401, a liquid injection pipeline 402, a liquid injection valve 404 and a liquid injection nozzle 403. The buffer cup 401 is arranged above the static cavity 10 and is used to contain electrolyte; the two ends of the liquid injection pipeline 402 are respectively connected to the liquid injection outlet 4011 and the liquid injection through hole 1012, and the electrolyte is transported through the liquid injection pipeline 402; the liquid injection valve 404 is arranged on the liquid injection pipeline 402, and the connection and disconnection between the buffer cup 401 and the static cavity 10 is controlled by the liquid injection valve 404; the liquid injection nozzle 403 is arranged at one end of the liquid injection pipeline 402 connected to the liquid injection through hole 1012, and is used to dock with the liquid inlet of the battery at the liquid injection through hole 1012.

[0036] In this embodiment, based on the design that the buffer cup 401 is located on the upper part of the injection mechanism 40, after the injection valve 404 is opened, since the gas pipeline 30 connects the buffer cup 401 and the static cavity 10, the electrolyte contained in the buffer cup 401 will be injected into the battery injection port in the static cavity 10 after passing through the injection pipeline 402 and the injection nozzle 403 in sequence due to the influence of gravity.

[0037] In this embodiment, the injection mechanism 40 is arranged outside the static cavity 10. After being connected by the air path, it is not necessary to evacuate the injection mechanism 40 and the static cavity 10 separately during isobaric injection, and the operation is simple. When isobaric injection is adopted, the air valve 302 is opened, and the pressure of the static cavity 10 is equal to the pressure in the injection mechanism 40; when differential pressure injection is adopted, the air valve 302 is closed, and differential pressure injection is performed by adjusting the pressure of the injection mechanism 40 and the corresponding pipeline. Based on this injection device, on the one hand, the two injection methods of isobaric injection or differential pressure injection can be freely selected according to actual needs, and on the other hand, the branch air pipe 301 can be used to synchronously evacuate the static cavity 10 and the injection mechanism 40, which simplifies the vacuuming process and improves the operating efficiency.

[0038] In some exemplary embodiments, since the static chamber 10 is miniaturized, the liquid injection device is preferably used to perform liquid injection and static treatment on a single single battery 20. Exemplarily, the volume of the static chamber 10 is adapted to a single single battery 20.

[0039] Considering that the height difference of the single battery 20 is small, the height of the accommodation space formed by the upper cavity 101 and the lower cavity 102 can adapt to the single battery 20 with a height between 50 and 250 mm. However, the width and length of the single battery 20 vary greatly, so the width and length of the static cavity 10 are optimized and adjusted. Among them, the distance between the inner surfaces of the two side walls opposite to each other in the width direction of the lower cavity 102 is a first preset distance (corresponding to the width), and the range of the first preset distance is not less than 120 mm; the distance between the inner surfaces of the two side walls opposite to each other in the length direction of the lower cavity 102 is a second preset distance (corresponding to the length), and the range of the second preset distance is not less than 370 mm. Based on the above-mentioned size restrictions, the injection device can be compatible with single batteries 20 with a length between 50 and 350 mm and a width between 10 and 100 mm, which can meet the injection and static processing requirements of most single batteries 20 in the market.

[0040] Since the static chamber 10 is miniaturized in this embodiment, the upper limit of the size of the first preset distance should not be too large, and the design range of the first preset distance can be set to be controlled within 120mm~150mm; the upper limit of the size of the second preset distance should not be too large, and the design range of the second preset distance can be set to be controlled within 370mm~400mm.

[0041] In addition, the outer dimensions of the static cavity 10 (i.e., the corresponding first preset distance + corresponding wall thickness, the second preset distance + corresponding wall thickness) can be determined according to actual needs. For example, the outer dimensions of the upper cavity (i.e., upper cover) 101 of the static cavity 10 are: 384 mm in length, 134 mm in width, and 93 mm in height, wherein the side wall thickness of the upper cavity 101 is 10 mm, and the top wall thickness is 21 mm; the outer dimensions of the lower cavity (i.e., lower shell) 102 of the static cavity 10 are: 384 mm in length, 134 mm in width, and 234 mm in height, wherein the side wall thickness of the lower cavity 102 is 10 mm, and the bottom wall thickness is 15 mm.

[0042] Based on the static chamber 10, the auxiliary time of positive and negative pressure cycles can be reduced, the medium flow rate can be reduced, the energy consumption and the noise of pressurization and pressure relief can be reduced. In addition, since the injection device is small in size, its floor space is also reduced accordingly, the production cycle can be shortened, the cost can be reduced, and the weight can also be reduced.

[0043] It should be noted that in this embodiment, the accommodating space formed by the lower cavity 102 is relatively large, and most of the single cells 20 are accommodated in the lower cavity 102, while the size of the upper cavity 101 is adapted to the lower cavity 102. Therefore, the "distance between the inner surfaces of the two opposite side walls of the lower cavity 102 in the width direction" can be understood as the width of the stationary cavity 10, and the "distance between the inner surfaces of the two opposite side walls of the lower cavity 102 in the length direction" can be understood as the length of the stationary cavity 10.

[0044] In some exemplary embodiments, Figure 2 As shown, the upper cavity 101 and the lower cavity 102 are detachably connected by fasteners. The upper cavity 101 is provided with a first positioning hole 1013, the lower cavity 102 is provided with a second positioning hole 1021, and the fasteners penetrate the first positioning hole 1013 and the second positioning hole 1021. Exemplarily, the fasteners are one or more of screws, bolts, rivets, and positioning pins.

[0045] Considering that the stationary cavity includes an upper cavity 101 and a lower cavity 102, which are designed in an upper and lower structure, in this embodiment, the positioning pin 60 can be pre-installed on the upper cavity 101 or the lower cavity 102, and during the docking process of the two, the positioning pin is used to perform positioning and guidance to facilitate the docking and assembly of the lower cavity 102 with the upper cavity 101. After the two are positioned and aligned, the positioning pin 60 is used to lock the upper cavity 101 and the lower cavity 102.

[0046] In some exemplary embodiments, Figure 2 As shown, considering the small size of the positioning pin 60, the positioning effect of only using the positioning pin 60 for guidance is general, and other guiding components can be added to perform guiding alignment during the alignment process of the upper cavity 101 and the lower cavity 102.

[0047] In order to simplify the component structure, in some other implementations, the lifting mechanism can be combined with the guide component. Exemplarily, the liquid injection device also includes: a guide drive mechanism 50 for docking / separating the upper cavity 101 and the lower cavity 102.

[0048] In some exemplary embodiments, Figure 4 As shown, the guide drive mechanism 50 includes: a slide rail 504; a sliding base 503, which is slidably arranged on the slide rail 504, wherein the sliding base 503 is provided with a guide hole; a top seat 506, which is used to install the static cavity 10, wherein the top seat 506 is provided with a guide column 501 that matches the guide hole; and a hydraulic assembly 502, which is arranged on the sliding base 503 and is used to lift the top seat 506. This assembly can not only realize the lifting and lowering control of the lower cavity 102, but also assist in the alignment of the guide column 501 and the guide hole during the lifting process, so as to avoid the shaking of the lower cavity 102 during the lifting process, which affects the alignment of the battery's liquid inlet and the liquid injection through hole 1012 / liquid injection nozzle 403.

[0049] Exemplarily, the hydraulic assembly 502 is a lifting cylinder, which is disposed below the lower cavity 102 and is used to lift the lower cavity 102 so that the lower cavity 102 and the upper cavity 101 are closed.

[0050] In some exemplary embodiments, the upper cavity 101 is fixed by a fixing frame, and the single battery 20 is replaced by moving the lower cavity 102. Figure 4 As shown, the guide drive mechanism 50 is also provided with a baffle 505 for limiting the sliding base 503 at a preset position. Based on the baffle 505, the sliding base 503 with the lower cavity 102 can be accurately adjusted to a preset position, so as to dock with the upper cavity 101 clamped or fixed by the corresponding fixing frame.

[0051] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships in the working state of the present application. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] The present application has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, various replacements and improvements may be made to the present application, all of which fall within the scope of protection of the present application.

Claims

1. A battery injection device, characterized in that: The liquid injection device comprises: The static cavity is used to place the battery and is provided with a liquid injection hole and an exhaust hole; A liquid injection mechanism, the liquid injection mechanism is arranged above the static cavity, wherein the liquid injection mechanism is provided with a ventilation port and a liquid injection outlet, and the liquid injection outlet is connected to the liquid injection through hole; The air pipeline is used to connect the ventilation port of the injection mechanism with the exhaust hole, wherein the air pipeline is also provided with a branch air pipe connected to the outside, and the branch air pipe is provided with an air valve.

2. The battery liquid injection device according to claim 1, characterized in that: The static cavity comprises: an upper cavity and a lower cavity, The upper cavity is provided with the liquid injection through hole and the exhaust hole.

3. The battery injection device according to claim 2, characterized in that: The liquid injection device also includes: A clamp assembly is arranged in the lower cavity and is used for clamping the battery.

4. The battery liquid injection device according to claim 3, characterized in that: The clamp assembly also includes: An elastic member is used to connect the clamp assembly and the lower cavity.

5. The battery liquid injection device according to claim 2, characterized in that: The upper cavity is detachably connected to the lower cavity.

6. The battery liquid injection device according to claim 5, characterized in that: The upper cavity is connected to the lower cavity by a fastener, and the fastener is one or more of a screw, a bolt, a rivet, and a positioning pin. The upper cavity is provided with a first positioning hole, the lower cavity is provided with a second positioning hole, and the fastener passes through the first positioning hole and the second positioning hole.

7. The battery liquid injection device according to any one of claims 1 to 6, characterized in that: The liquid injection mechanism comprises: A buffer cup, arranged above the static cavity, for containing electrolyte; A liquid injection pipeline, two ends of which are respectively connected to the liquid injection outlet and the liquid injection through hole, and are used to transport the electrolyte; A liquid injection valve, arranged on the liquid injection pipeline, used to control the connection and disconnection between the buffer cup and the static cavity; The liquid injection nozzle is arranged at one end of the liquid injection pipeline connected to the liquid injection through hole, and is used for docking with the liquid inlet of the battery at the liquid injection through hole.

8. The battery liquid injection device according to any one of claims 1 to 6, characterized in that: The volume of the static chamber is adapted to a single single battery. Among them, the distance between the inner surfaces of the two side walls of the static cavity that are opposite to each other in the width direction is a first preset distance, and the range of the first preset distance is not less than 120mm; the distance between the inner surfaces of the two side walls of the static cavity that are opposite to each other in the length direction is a second preset distance, and the range of the second preset distance is not less than 370mm.

9. The battery liquid injection device according to any one of claims 2 to 6, characterized in that: The liquid injection device further comprises: a guide drive mechanism for docking / separating the upper cavity and the lower cavity.

10. The battery liquid injection device according to claim 9, characterized in that: The guide drive mechanism comprises: Slide rails; A sliding base is slidably disposed on the slide rail, wherein a guide hole is provided on the sliding base; A top seat, used for mounting the static cavity, wherein the top seat is provided with a guide column matched with the guide hole; A hydraulic assembly is arranged on the sliding base and is used for lifting and lowering the top seat.

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