Quantitative electrolyte injection device and quantitative electrolyte injection equipment
By using an upper and lower arranged electrolyte injection chamber and a floating locking component in battery production, automatic quantitative injection of electrolyte is achieved, which solves the problems of cumbersome, time-consuming and polluting electrolyte injection process in the prior art, and improves the degree of automation and efficiency.
Patent Information
- Application Number
- CN202423235428.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In the current battery production process, the quantitative injection of electrolyte is cumbersome, time-consuming, and prone to volatilization, resulting in large errors and serious pollution.
The system employs a first and second injection chamber arranged vertically, combined with a floating component and a locking component, to control the liquid flow or shut-off by adjusting the liquid level, thereby achieving automatic quantitative injection.
It improves the automation of electrolyte metering, reduces errors and contamination, and increases efficiency.
Smart Images
Figure CN223828688U_ABST
Abstract
Description
Technical Field
[0001] This disclosure generally relates to the field of battery manufacturing technology. More specifically, this disclosure relates to a metering electrolyte injection device and a metering electrolyte injection apparatus. Background Technology
[0002] The battery manufacturing process includes the step of injecting electrolyte into battery cells. During pilot production and other processes, it is sometimes necessary to obtain a small amount of electrolyte or other liquids of a specific weight for relevant performance tests. In existing processes, the predetermined weight of electrolyte is typically measured manually. However, this process is cumbersome, prone to errors, and time-consuming because it requires manually transferring the electrolyte between different containers and weighing it. Furthermore, significant amounts of electrolyte evaporate during the measurement and transfer process, resulting in considerable pollution.
[0003] In view of this, there is an urgent need to provide a quantitative liquid injection device and a quantitative liquid injection equipment for electrolyte, so as to improve the automation level and quantitative efficiency in the quantitative liquid injection process. Utility Model Content
[0004] In order to at least solve one or more of the technical problems mentioned above, this disclosure provides a quantitative liquid injection device and liquid injection equipment in several aspects.
[0005] In a first aspect, this disclosure provides a quantitative liquid injection device, comprising: an injection container having a first injection chamber and a second injection chamber arranged vertically along the direction of gravity, the first injection chamber having an inlet on its top side and an outlet on its bottom side that can be opened and closed, the bottom side of the outlet communicating with the second injection chamber, and the bottom side of the second injection chamber also having an injection port; and a floating locking assembly comprising a locking assembly fixedly disposed on the inner wall of the first injection chamber and a floating assembly capable of reciprocating relative to the locking assembly along the direction of gravity, the floating assembly comprising a floating plate and a locking block fixedly connected to the floating plate, the floating plate being disposed in the second injection chamber and capable of sealing the outlet, the locking block and the locking assembly engaging with each other through the action of an elastic element, so as to releaseably fix the locking block along the direction of gravity.
[0006] In some embodiments, a first injection container and a second injection container are included, a first injection cavity is formed in the first injection container, a second injection cavity is formed in the second injection container, and the first injection container is detachably fixed to the second injection container.
[0007] In some embodiments, the first injection container includes a first inner wall and a first outer wall that are formed as annular and nested together, and the second injection container includes a second cavity wall that is formed as a cylinder, wherein the radial outer side of the first outer wall and the radial inner side of the second cavity wall are fixedly connected in a dimensionally compatible manner.
[0008] In some embodiments, the locking assembly includes a spring locking pin, which includes a locking spring disposed transverse to the direction of movement of the locking block and an abutment driven by the locking spring, wherein the locking block is releasably secured by abutting against the locking block via the abutment.
[0009] In some embodiments, the bottom side of the abutment includes a guide surface that is inclined relative to the moving direction of the locking block; the abutment surface of the locking block abutting the guide surface is configured as a spherical surface.
[0010] In some embodiments, the first injection container includes a first bottom wall fixedly connected to a first outer wall and a first inner wall, the floating locking assembly includes a plurality of pairs of spring locking pins spaced apart circumferentially along the first injection cavity, and the first bottom wall is provided with a plurality of discharge ports spaced apart circumferentially along the first injection cavity.
[0011] In some embodiments, the top side of the abutment further includes an unlocking ramp angled to the locking block, wherein the angle of inclination of the unlocking ramp relative to the moving direction of the abutment is smaller than the angle of inclination of the guide surface relative to the moving direction of the abutment.
[0012] In some embodiments, the floating assembly includes a plurality of floating plates, each floating plate being aligned with at least one injection port in the direction of gravity.
[0013] In some embodiments, a drain valve is also included. A drain valve mounting hole is provided on the bottom side of the second injection chamber. The drain valve includes a valve pin and a drain valve hole disposed on the valve pin. The drain valve is rotatably disposed in the drain valve mounting hole.
[0014] In a second aspect, this disclosure provides a metering device for an electrolyte, including a metering device according to the first aspect and several embodiments, and a metering cup connected to the metering device.
[0015] The quantitative liquid injection device provided above, by setting up a first injection chamber and a second injection chamber arranged vertically, setting up a floating component for closing or opening the outlet at the bottom of the first injection container, and setting up a locking component fixedly set in the first injection container to lock the floating component, can control the outflow or closure of the liquid in the first injection chamber by the liquid level in the second injection chamber, thereby automatically quantitatively injecting liquid for use. Attached Figure Description
[0016] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:
[0017] Figure 1An exemplary cross-sectional view of a quantitative injection device according to some embodiments of this disclosure is shown;
[0018] Figure 2 An exemplary cross-sectional view of the first and second injection containers of the quantitative injection device according to some embodiments of this disclosure in a combined state is shown;
[0019] Figure 3 An exemplary top view of the floating locking component portion of a metering injection device according to some embodiments of this disclosure is shown;
[0020] Figure 4 An exemplary cross-sectional view of the spring locking pin of a metering injection device according to some embodiments of this disclosure is shown;
[0021] Figure 5 An exemplary cross-sectional view of the drain valve of a quantitative injection device according to some embodiments of this disclosure is shown;
[0022] Figure 6 An exemplary cross-sectional view of the spring locking pin of a metering injection device according to some embodiments of this disclosure is shown;
[0023] Figure 7 An exemplary top view of the floating locking component portion of a metering injection device according to some embodiments of this disclosure is shown;
[0024] Figure 8 This disclosure includes exemplary side views of electrolyte metering devices according to some embodiments. Detailed Implementation
[0025] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.
[0026] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0027] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.
[0028] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."
[0029] The battery manufacturing process includes the step of injecting electrolyte into battery cells. During pilot production, a small, measured weight of electrolyte is sometimes required for performance testing. Currently, the process typically involves manually measuring and obtaining the predetermined weight of electrolyte. Specifically, the electrolyte is manually poured into a measuring container, and the weight of the electrolyte is determined by weighing the container before and after measurement. The electrolyte is then transferred from the measuring container to a collet, and finally to a settling chamber for storage. This process is cumbersome, time-consuming, and involves significant electrolyte evaporation and contamination during measurement and transfer.
[0030] In view of this, the present disclosure provides a quantitative liquid injection device and a quantitative liquid injection equipment for electrolyte. By setting a first injection chamber and a second injection chamber arranged vertically, setting a floating component for closing or opening the outlet at the bottom of the first injection container, and setting a locking component fixedly set in the first injection container for locking the floating component, the liquid outflow or closure of the first injection chamber can be controlled by the liquid level in the second injection chamber, thereby automatically quantitatively injecting liquid for use.
[0031] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.
[0032] See Figure 1 , Figure 1An exemplary cross-sectional view of a quantitative liquid injection device according to some embodiments of this disclosure is shown. In some embodiments, the quantitative liquid injection device 100 includes an injection container 10 and a floating locking assembly 20. The injection container 10 includes a first injection container 11 and a second injection container 12. A first injection chamber 110 is formed in the first injection container 11. An inlet 1100 for injecting liquid is provided on the top side of the first injection chamber 110, and an outlet 1130 for releasing liquid from the first injection chamber 110 is provided on the bottom side of the first injection chamber 110. A second injection chamber 120 is formed in the second injection container 12, located on the bottom side of the outlet 1130 and communicating with the outlet 1130. The second injection container 12 also includes an injection port 1220 provided on the bottom side of the second injection chamber 120. The second injection chamber 120 is used to receive the liquid discharged from the first injection chamber 110 through the discharge port 1130, and can inject the received liquid into the external cup through the injection port 1220 for use in subsequent production processes.
[0033] See also Figure 1 and Figure 3 , Figure 3 An exemplary top view of a floating locking assembly portion of a quantitative injection device according to some embodiments of this disclosure is shown, wherein a first injection container and a second injection container are shown in dashed lines. The floating locking assembly 20 includes a locking assembly 21 fixedly disposed on the inner wall of the first injection container 11, and a floating assembly 22 movable relative to the locking assembly 21 in the direction of gravity. The floating assembly 22 includes a floating plate 223 and a locking block 221 fixedly connected to the floating plate 223. The floating plate 223 is disposed on the lower side of the first injection container 11 and is capable of sealing the discharge port 1130. The locking block 221 and the locking assembly 21 are engaged with each other by an elastic element, so that the locking block 221 can be releasably fixed in the direction of gravity.
[0034] Specifically, first see also Figure 1 and Figure 2 , Figure 2An exemplary cross-sectional view of a first and second injection container of a quantitative injection device according to some embodiments of the present disclosure is shown in an assembled state. In this embodiment, the first injection container 11 includes a first inner wall 111 and a first outer wall 112, which are annular and extend in the direction of gravity. The first outer wall 112 is fitted over the outer side of the first inner wall 111, and the bottom sides of the first inner wall 111 and the first outer wall 112 are fixedly disposed on an annular first bottom wall 113. The first outer wall 112, the first inner wall 111, and the first bottom wall 113 together enclose the first injection cavity 110. The outlet 1130 is a plurality of through openings disposed on the first bottom wall 113. The second injection container 12 includes a cylindrical second cavity wall 121, the radially inner side of which can form a shape fit and / or size fit with the radially outer side of the first outer wall 112, so that the second injection container 12 is relatively fixed to the first injection container 11. The bottom of the second cavity wall 121 is fixedly connected to the second bottom wall 122. The second cavity wall 121 and the second bottom wall 122 together enclose the second injection cavity 120, and the injection port 1220 is an opening that penetrates the second bottom wall 122.
[0035] The inner side of the first inner wall 111 encloses a pressure relief port 1110 extending along the direction of gravity. The lower side of the pressure relief port 1110 communicates with the second injection chamber 120, while its upper side communicates with the external atmosphere or is connected to an exhaust gas treatment device. The pressure relief port 1110 is used to balance the air pressure inside and outside the injection container 10, allowing the liquid in the first injection chamber 110 to flow into the second injection chamber 120 by its own weight. In this embodiment, the first outer wall 112 and the second chamber wall 121 are fixed to each other by a shape-fit and size-fit method. However, those skilled in the art will understand that the present disclosure does not limit the fixing method between the first injection container 11 and the second injection container 12. For example, in some other embodiments not shown, the two can be connected to each other by bolts or other components, or a flange extending radially outward can be provided at the top of the outer wall of the first injection container 11, and the flange can be overlapped or snapped onto the upper end of the second chamber wall 121 to fix the first injection container 11 relative to the second injection container 12.
[0036] At the same time, see again Figure 1 and Figure 3The floating plate 223 of the floating assembly 22 is generally annular in shape and is disposed on the lower side of the first bottom wall 113, while the locking block 221 is disposed on the upper side of the first bottom wall 113 and is fixedly connected to the floating plate 223 by a connector 222 that penetrates the first bottom wall 113. The floating plate 223 is made of low-density corrosion-resistant material such as low-density polyethylene or hollow corrosion-resistant material, so that when the second injection chamber 120 is filled with liquid, the floating plate 223 can float under the buoyancy of the liquid. The locking assembly 21 is fixedly disposed on the radially inner side of the first inner wall 111, and the locking assembly 21 includes multiple pairs of spring locking pins 211 disposed opposite to each other. The multiple pairs of spring locking pins 211 are arranged circumferentially spaced along the first injection chamber 110, and each pair of spring locking pins 211 is disposed on both sides of a locking block 221 along the radial direction of the first injection chamber 110.
[0037] By configuring the first injection container 11 and the second injection container 12 as a separable structure, the first injection container 11 can be manufactured separately from the second injection container 12, thereby saving production costs. Furthermore, when the target rated weight of the liquid requiring quantitative injection changes, the rated weight of liquid output per injection can be altered by replacing the first injection container 11 and the floating locking assembly 20 with different specifications. For example, changing the weight and volume of the floating plate 223 in the floating assembly 22, or the area of the outlet 1130 on the first bottom wall 113. Moreover, configuring the first injection container 11 and the second injection container 12 as separable also facilitates cleaning and troubleshooting of the container interiors.
[0038] In addition, see Figure 1 and Figure 4 , Figure 4 An exemplary cross-sectional view of the spring locking pin of a metering injection device according to some embodiments of this disclosure is shown. The locking assembly 21 includes a generally cylindrical locking sleeve 2111, a locking spring 2113 disposed inside the locking sleeve 2111, and an abutment 2112 movably disposed inside the locking sleeve 2111 and limited by the locking sleeve 2111 in a direction of movement. The axis of the locking spring 2113 is arranged radially along the first injection chamber 110, with one end abutting against the locking sleeve 2111 and the other end abutting against the abutment 2112, allowing the abutment 2112 to resiliently reciprocate in the radial direction. The abutment 2112 is partially exposed outside the locking sleeve 2111, and the exposed portions of the abutment 2112 of each pair of resilient locking pins are arranged opposite each other. The abutment member 2112 includes a guide surface 2112a that is inclined relative to the direction of movement of the abutment member 2112. The guide surface 2112a is used to abut against the locking block 221 and is driven by the locking block 221 to retract laterally. In this embodiment, the abutment surface of the locking block 221 that abuts against the guide surface 2112a is formed as a spherical surface, and the guide surface 2112a is also a spherical surface.
[0039] When liquid is injected into the second injection chamber 120 from the first injection chamber 110 through the outlet 1130, the floating plate 223 will float up under the buoyancy provided by the liquid and drive the locking block 221 to move upward. When the liquid level in the second injection chamber 120 approaches a predetermined value, the top of the locking block 221 abuts against the abutment member 2112 of its corresponding pair of spring locking pins 211 from bottom to top. The spherical abutment surface of the locking block 221 abuts against the spherical guide surface 2112a on the lower side of the abutment member 2112, and under the action of buoyancy, it overcomes the spring force of the two spring locking pins 211 and rises upward. The two locking blocks 221 retract to avoid the locking block 221, and after the locking block 221 rises above the abutment member 2112, it extends under the action of spring force to prevent the locking block 221 from falling. At this time, the locking block 221 is locked and held on its upper side by the spring locking pin 211. By setting the distance between the locking block 221 and the floating plate 223 to match the distance between the elastic locking pin and the first bottom wall 113, it is possible to make the floating plate 223 fit exactly against the first bottom wall 113 when the spring locking pin 211 locks the locking block 221, thereby locking and sealing the outlet 1130 and preventing the liquid in the first injection chamber 110 from flowing out.
[0040] After the floating plate 223 closes the outlet 1130, the liquid level in the second injection chamber 120 reaches the predetermined value, at which point the liquid weight can be considered equal to the expected liquid weight. Even if liquid continues to be added to the first injection chamber 110, it will not affect the liquid weight in the second chamber, thus completing the automatic metering of the target liquid.
[0041] Furthermore, by opening the injection port 1220, a metered amount of liquid in the second injection chamber 120 can be injected into the external sleeve cup. After draining the liquid, the injection port 1220 is closed again. Subsequently, liquid can continue to be injected into the first injection chamber 110 through the inlet port 1100. At this time, the total weight of the liquid in the first injection chamber 110 will gradually increase, and the pressure exerted on the upper side of the floating plate 223 through the outlet port 1130 will also gradually increase. When this pressure exceeds the holding force of the spring locking pin 211 on the locking block 221, the locking block 221 will overcome the spring force of the spring locking pin 211 and drop, causing the floating plate 223 to separate from the first bottom wall 113. The outlet port 1130 then connects with the second injection chamber 120, allowing the liquid in the first injection chamber 110 to flow into the second injection chamber 120, and continuing the aforementioned metered injection cycle.
[0042] In addition, the bottom side of the second chamber also includes a drain valve 30 for controlling the opening and closing of the injection port 1220. See also Figure 1 and Figure 5 , Figure 5An exemplary cross-sectional view of the drain valve of a quantitative liquid injection device according to some embodiments of this disclosure is shown. A drain valve mounting hole 1221 is provided on the bottom side of the second injection chamber 120, and the drain valve mounting hole 1221 is arranged perpendicular to the extending direction of the injection port 1220. A drain valve 30 is rotatably mounted within the drain valve mounting hole 1221, and includes a generally rod-shaped valve pin 31 and a drain valve hole 32 provided on the valve pin 31, extending radially through the valve pin 31. By rotating the drain valve 30, the drain valve hole 32 can be aligned with or closed to the injection port 1220. When the axis of the drain valve hole 32 is aligned with the injection port, the injection port 1220 opens downwards, allowing liquid in the second injection chamber 120 to flow out through the injection port 1220. When the drain valve 30 is rotated so that the axis of the drain valve orifice 32 is oblique or perpendicular to the injection port 1220, and the side wall of the valve pin 31 blocks the injection port 1220, the injection port 1220 is closed downward, and the operation of injecting liquid into the second injection chamber 120 can be performed.
[0043] Those skilled in the art will understand that although the above description describes a structure in which the first and second injection containers are configured with nested annular and cylindrical outer walls, the present disclosure does not limit the specific structure and connection method of the first and second injection containers. For example, in some embodiments not shown, the first and second injection containers are the upper and lower layers of the same container, both of which are configured with cylindrical outer walls. The bottom of the first injection container has a first bottom wall for separating the first injection chamber from the second injection chamber, and the bottom of the second injection container has a second bottom wall for sealing and enclosing the second injection chamber. The first and second injection chambers are connected to each other through multiple outlets spaced circumferentially along the first bottom wall, and the side wall of the second injection container also has a pressure relief port communicating with the outside, which is used to balance the internal and external air pressure and collect waste gas. Thus, by integrally forming the first and second injection containers, the overall sealing performance of the quantitative injection device is significantly improved, and the structural strength is better, making it more suitable for long-term containment and transportation of corrosive liquids.
[0044] In addition, see Figure 6 , Figure 6An exemplary cross-sectional view of the spring locking pin of a metering dispensing device according to some embodiments of this disclosure is shown. In some embodiments, the abutment 2112 of the spring locking pin 211 does not include a spherical surface, but is instead configured to have an inclined guide surface 2112a on the bottom side and an unlocking ramp 2112b disposed on the top side opposite to the guide surface 2112a. Both the guide surface 2112a and the unlocking ramp 2112b are inclined relative to the direction of movement of the abutment 2112, and the angle of inclination of the unlocking ramp 2112b relative to the direction of movement of the abutment 2112 is smaller than the angle of inclination of the guide surface 2112a relative to the direction of movement of the abutment. Thus, when the locking block 221 moves from bottom to top relative to the abutment 2112, it will contact the guide surface 2112a, and the steeper angle of inclination of the guide surface 2112a allows the locking block 221 to overcome the spring force with a smaller force and be locked by the locking assembly 21. After the liquid in the second injection chamber 120 is discharged, when liquid is injected into the first injection chamber 110, the relatively gentle inclined unlocking slope 2112b will require the locking block 221 to exert a larger downward force to overcome the spring force of the spring locking pin 211. This further ensures the stable holding of the locking assembly 21 on the floating assembly 22, reducing the probability of the floating assembly 22 accidentally unlocking.
[0045] Those skilled in the art will understand that although the above describes a technical solution for simultaneously closing multiple outlets 1130 using a floating plate 223, this disclosure does not limit the specific arrangement of the floating component 22. For example, see... Figure 7 , Figure 7 An exemplary top view of a floating locking assembly portion of a quantitative injection device according to some embodiments of this disclosure is shown, with a first injection container and a second injection container shown in dashed lines. In this embodiment, the floating assembly 22 includes two generally fan-shaped floating plates 2231, each floating plate 2231 being fixedly connected to two locking blocks 221, and each floating plate 2231 sealing a plurality of outlets 1130. Thus, since each floating plate 2231 is connected to fewer locking blocks 221 relative to the floating plate 223, it experiences less friction during movement and is less prone to jamming during movement. In some embodiments not shown, the floating assembly 22 includes more floating plates, each connected to a locking block and capable of sealing at least one outlet, to further reduce friction during movement of the floating plates.
[0046] The quantitative liquid injection device according to this embodiment provides a first injection chamber 110 and a second injection chamber 120 arranged vertically, a floating component 22 for closing or opening the outlet 1130 at the bottom of the first injection container 11, and a locking component 21 fixedly disposed in the first injection container 11 to lock the floating component 22. The device can control the outflow or closure of the liquid in the first injection chamber 110 by the liquid level in the second injection chamber 120, thereby automatically quantitatively injecting liquid for use.
[0047] See Figure 8 , Figure 8 An exemplary side view of a metering device for electrolyte according to some embodiments of this disclosure is shown. In some embodiments, the metering device 200 for electrolyte includes a frame 80, a supply device 70, a dispensing cup 60, and a metering dispensing device 100 according to several embodiments of this disclosure. The supply device 70 and the metering dispensing device 100 are disposed on the upper surface of the frame 80, and the supply device 70 is connected to the metering dispensing device 100 to inject a metered amount of liquid into the metering dispensing device 100. The dispensing cup 60 is disposed below the metering dispensing device 100 to receive the liquid discharged after metering by the metering dispensing device 100.
[0048] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.
Claims
1. A quantitative liquid injection device, characterized in that, include: The liquid injection container (10) has a first liquid injection chamber (110) and a second liquid injection chamber (120) arranged vertically along the direction of gravity. The top side of the first liquid injection chamber (110) is provided with an inlet (1100), and the bottom side of the first liquid injection chamber (110) is provided with an openable outlet (1130). The bottom side of the outlet (1130) is connected to the second liquid injection chamber (120), and the bottom side of the second liquid injection chamber (120) is also provided with an injection port (1220). The floating locking assembly (20) includes a locking assembly (21) fixedly disposed on the inner wall of the first injection chamber (110) and a floating assembly (22) capable of reciprocating relative to the locking assembly (21) in the direction of gravity. The floating assembly (22) includes a floating plate (223) and a locking block (221) fixedly connected to the floating plate (223). The floating plate (223) is disposed in the second injection chamber (120) and capable of sealing the discharge port (1130). The locking block (221) and the locking assembly (21) are engaged with each other by the action of an elastic member so as to release the locking block (221) in the direction of gravity.
2. The quantitative liquid injection device according to claim 1, characterized in that, It includes a first injection container (11) and a second injection container (12), the first injection cavity (110) is formed in the first injection container (11), the second injection cavity (120) is formed in the second injection container (12), and the first injection container (11) is detachably fixed to the second injection container (12).
3. The quantitative liquid injection device according to claim 2, characterized in that, The first injection container (11) includes a first inner wall (111) and a first outer wall (112) that are formed in an annular shape and nested together. The second injection container (12) includes a second cavity wall (121) that is formed in a cylindrical shape. The radial outer side of the first outer wall (112) and the radial inner side of the second cavity wall (121) are fixedly connected in a dimensionally compatible manner.
4. The quantitative liquid injection device according to claim 3, characterized in that, The locking assembly (21) includes a spring locking pin (211), which includes a locking spring (2113) arranged transversely to the moving direction of the locking block (221) and an abutment (2112) driven by the locking spring (2113). The locking block (221) is releasably fixed by the abutment (2112) against the locking block (221).
5. The quantitative liquid injection device according to claim 4, characterized in that, The bottom side of the abutment (2112) includes a guide surface (2112a) that is inclined relative to the moving direction of the locking block (221); the upper surface of the locking block (221) that abuts against the guide surface (2112a) is configured as a spherical surface.
6. The quantitative liquid injection device according to claim 5, characterized in that, The first injection container (11) includes a first bottom wall (113) fixedly connected to the first outer wall (112) and the first inner wall (111). The floating locking assembly (20) includes multiple pairs of spring locking pins (211) spaced apart circumferentially along the first injection cavity (110). The first bottom wall (113) is provided with multiple outlets (1130) spaced apart circumferentially along the first injection cavity (110).
7. The quantitative liquid injection device according to claim 5, characterized in that, The top side of the abutment (2112) also includes an unlocking ramp (2112b) that is angled to the locking block (221). The angle of inclination of the unlocking ramp (2112b) relative to the moving direction of the abutment (2112) is smaller than the angle of inclination of the guide surface (2112a) relative to the moving direction of the abutment (2112).
8. The quantitative liquid injection device according to claim 6 or 7, characterized in that, The floating assembly (22) includes a plurality of floating partitions (2231), which are aligned with at least one of the injection ports (1220) in the direction of gravity.
9. The quantitative liquid injection device according to claim 8, characterized in that, It also includes a drain valve (30), and the bottom side of the second injection chamber (120) is provided with a drain valve mounting hole (1221). The drain valve (30) includes a valve pin (31) and a drain valve hole (32) provided on the valve pin (31). The drain valve (30) is rotatably provided in the drain valve mounting hole (1221).
10. A metering device for electrolyte dispensing, characterized in that, It includes a quantitative injection device according to any one of claims 1 to 9, and an injection cup connected to the quantitative injection device.