Air exhausting and liquid supplementing device and battery
By designing an exhaust fluid replenishing device, gas is used to promote the movement of the blocked body to achieve gas discharge and electrolyte replenishment, solving the problems of increasing internal pressure of the battery and reducing electrolyte, enhancing the stability of the battery and extending the cycle life.
Patent Information
- Application Number
- CN202421810122.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-29
AI Technical Summary
During the long-term operation of the battery, the decrease in electrolyte leads to an increase in internal resistance and a decrease in cycle life. At the same time, the internal pressure of the battery increases, which easily leads to safety accidents.
A gas-exhaust liquid replenishment device is designed to drive the blocking body to move through gas, realize gas discharge and electrolyte replenishment, and use elastic liquid suction parts and waterproof and breathable membrane to ensure that the liquid does not leak, enhance battery stability and extend life.
Effectively reduce the internal pressure of the battery, prevent electrolyte leakage, improve battery stability and extend cycle life.
Smart Images
Figure CN223079176U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of batteries, and particularly to an exhaust and liquid replenishment device and a battery. Background Art
[0002] During the long-term operation of a battery, the internal electrolyte will be continuously consumed, and at the same time, a large amount of gas will be generated inside the battery, increasing the internal pressure of the battery. On the one hand, the reduction of the electrolyte will increase the internal resistance and reduce the cycle life of the battery; on the other hand, the increase in the internal pressure of the battery will affect the internal stability of the battery and easily lead to safety accidents. Summary of the Utility Model
[0003] To solve the above technical problems, embodiments of this application provide an exhaust and liquid replenishment device and a battery, which can discharge the gas generated inside while replenishing the electrolyte, enhance the stability of the battery, and extend the cycle life of the battery.
[0004] In a first aspect, an exhaust and liquid replenishment device is provided, including:
[0005] A box body, provided with a breathable cavity, an air inlet, an air outlet, a liquid storage cavity, and a liquid replenishment pipeline, and the air inlet, the air outlet, the liquid storage cavity, and the liquid replenishment pipeline are all communicated with the breathable cavity;
[0006] An elastic liquid-absorbing member, including an elastic body, a first branch, and a second branch, the elastic body is arranged in the breathable cavity, the first branch is connected to the elastic body, the first branch extends into the liquid storage cavity, the second branch is connected to the elastic body, and the second branch extends into the liquid replenishment pipeline;
[0007] A blocking body, arranged in the breathable cavity, and the blocking body abuts against the elastic body.
[0008] According to the first aspect of this application, the exhaust and liquid replenishment device further includes:
[0009] A first waterproof and breathable membrane, arranged at the air inlet; and / or,
[0010] A second waterproof and breathable membrane, arranged at the air outlet.
[0011] According to the first aspect of this application, the end of the liquid replenishment pipeline away from the breathable cavity is provided with an output port;
[0012] The exhaust and liquid replenishment device further includes:
[0013] An isolation member, arranged in the output port, and the isolation member is used to allow the liquid in the liquid replenishment pipeline to pass through and block the gas outside the output port from entering the liquid replenishment pipeline.
[0014] According to the first aspect of the present application, the isolation element comprises:
[0015] The plastic sheet is provided with a plurality of first through holes;
[0016] An elastic sheet, which is stacked and distributed with the plastic sheet, and the elastic sheet is located on a side of the plastic sheet away from the infusion pipe, and the elastic sheet is provided with a plurality of second through holes;
[0017] The plurality of first through holes and the plurality of second through holes are distributed crosswise with each other, so that any of the first through holes and any of the second through holes are not connected to each other.
[0018] According to a first aspect of the present application, one end of the first branch away from the elastic body abuts against the bottom wall of the liquid storage chamber.
[0019] According to a first aspect of the present application, when the blocking body is in the first position, the height position of the top wall of the blocking body is higher than the height position of the top wall of the air outlet.
[0020] According to the first aspect of the present application, when the blocking body is in the second position, the bottom wall of the blocking body is located at a height position higher than the top wall of the air outlet.
[0021] According to the first aspect of the present application, a partition is provided in the box body, the air permeable cavity and the liquid storage cavity are respectively provided on opposite sides of the partition, the partition is provided with a through hole, the through hole connects the air permeable cavity and the liquid storage cavity, and the first branch extends from the elastic body into the liquid storage cavity through the through hole.
[0022] According to the first aspect of the present application, when the blocking body is in the second position, the height position of the bottom wall of the elastic body is lower than the height position of the top wall of the through hole.
[0023] In a second aspect, a battery is also provided, comprising:
[0024] A shell body, in which a battery cell is arranged, wherein the shell body is provided with an exhaust port and a liquid replenishing port;
[0025] As in the exhaust and fluid replenishment device described in the previous embodiment, the box body is arranged on the outer wall of the shell, the air inlet is connected to the exhaust port, and the end of the fluid replenishment pipe away from the air permeable cavity is connected to the fluid replenishment port.
[0026] The exhaust and liquid replenishment device and battery provided by the embodiments of the present application enable the plugging body to move from the first position to the second position by gas, so that the air inlet and the air outlet are opened, and gas can flow from the air inlet to the air outlet and finally be discharged from the air outlet, achieving the effect of discharging the gas inside the housing, reducing the internal pressure of the housing, and enhancing the stability of the battery. In addition, by gas pushing the plugging body to move from the first position to the second position, the plugging body squeezes the elastic body, the elastic body is compressed and undergoes elastic deformation, and the liquid inside can be transported to the second branch, and then the liquid is input into the housing through the second branch through the liquid replenishment channel, achieving the effect of replenishing liquid for the battery core and extending the cycle life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] By describing the embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application. In the drawings, the same reference numerals generally represent the same components or steps.
[0028] Figure 1 FIG. is a schematic structural diagram of a battery provided by an exemplary embodiment of the present application.
[0029] Figure 2 FIG. is a schematic structural diagram of the exhaust and liquid replenishment device provided by an exemplary embodiment of the present application in the first position.
[0030] Figure 3 FIG. is a schematic structural diagram of the exhaust and liquid replenishment device provided by an exemplary embodiment of the present application in the second position.
[0031] Figure 4 FIG. is an exploded schematic diagram of a separator provided by an exemplary embodiment of the present application.
[0032] Reference numerals: 100 - exhaust and liquid replenishment device; 110 - box body; 111 - breathable cavity; 112 - air inlet; 113 - air outlet; 114 - liquid storage cavity; 115 - liquid replenishment pipeline; 116 - output port; 120 - elastic liquid absorbing member; 121 - elastic body; 122 - first branch; 123 - second branch; 130 - plugging body; 140 - first waterproof and breathable membrane; 150 - second waterproof and breathable membrane; 160 - separator; 161 - plastic sheet; 1611 - first through hole; 162 - elastic sheet; 1621 - second through hole; 170 - partition; 171 - through hole; 200 - battery; 210 - housing. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0033] Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described herein.
[0034] Figure 1 The structural schematic diagram of a battery provided for an exemplary embodiment of the present application. As Figure 1 shown, the battery 200 provided in the embodiment of the present application may include a housing 210 and an exhaust and liquid filling device 100. An electric core (not shown in the figure) is provided inside the housing 210. The exhaust and liquid filling device 100 is disposed on the outer wall of the housing 210. The exhaust and liquid filling device 100 can discharge the gas generated during the operation of the electric core inside the housing 210 while filling the inside of the housing 210 with liquid, thereby enhancing the stability of the battery 200 and extending the service life of the battery 200. The exhaust and liquid filling device 100 will be introduced in detail below.
[0035] Figure 2 The structural schematic diagram of the exhaust and liquid filling device provided for an exemplary embodiment of the present application in the first position. Figure 3 The structural schematic diagram of the exhaust and liquid filling device provided for an exemplary embodiment of the present application in the second position. As Figure 2 and Figure 3 shown, the exhaust and liquid filling device 100 may include a box body 110. The box body 110 is provided with a breathable cavity 111, an air inlet 112, an air outlet 113, a liquid storage cavity 114, and a liquid filling pipeline 115. The air inlet 112, the air outlet 113, the liquid storage cavity 114, and the liquid filling pipeline 115 are all communicated with the breathable cavity 111. In practical applications, the aforementioned housing 210 is provided with an exhaust port (not shown in the figure). The gas can reach the air inlet 112 through the exhaust port, then enter the breathable cavity 111 through the air inlet 112, and then be discharged from the air outlet 113 through the breathable cavity 111. In addition, the aforementioned housing 210 is also provided with a liquid filling port (not shown in the figure). One end of the liquid filling pipeline 115 away from the breathable cavity 111 is communicated with the liquid filling port. The liquid in the liquid storage cavity 114 can enter the liquid filling pipeline 115 through the breathable cavity 111, and then enter the housing 210 through the liquid filling pipeline 115 and the liquid filling port, so as to realize the function of filling the electric core with liquid.
[0036] Specifically, the exhaust and liquid replenishment device 100 may include an elastic liquid absorbing member 120. The elastic liquid absorbing member 120 includes an elastic body 121, a first branch 122, and a second branch 123. The elastic body 121 is disposed in the air permeable cavity 111. Both the first branch 122 and the second branch 123 are connected to the elastic body 121. The first branch 122 extends into the liquid storage cavity 114. The first branch 122 can absorb the liquid in the liquid storage cavity 114 and transfer the absorbed liquid to the elastic body 121. The second branch 123 extends into the liquid replenishment pipeline 115. The liquid absorbed by the elastic body 121 can be transferred to the second branch 123 through extrusion, and then enter the housing 210 through the liquid replenishment pipeline 115 and the liquid replenishment port, achieving the function of replenishing liquid for the battery cell.
[0037] Specifically, the exhaust and liquid replenishment device 100 may further include a blocking body 130. The blocking body 130 is disposed in the air permeable cavity 111, and the blocking body 130 abuts against the elastic body 121.
[0038] As Figure 2 and Figure 3 shown, when the blocking body 130 is in the first position (such as the state shown in Figure 2 ), the bottom wall and the side wall of the blocking body 130 are respectively used to block the air inlet 112 and the air outlet 113. When the blocking body 130 is in the second position (such as the state shown in Figure 3 ), the blocking body 130 does not block the air inlet 112 and the air outlet 113, the air inlet 112 and the air outlet 113 are in an open state, and the air inlet 112 and the air outlet 113 are communicated through the air permeable cavity 111, which is convenient for gas to pass through.
[0039] As Figure 2 and Figure 3 shown, during the process of the blocking body 130 moving from the first position to the second position, the blocking body 130 can squeeze the elastic body 121, and the elastic body 121 is compressed and undergoes elastic deformation. During the process of the blocking body 130 moving from the second position to the first position, after the blocking body 130 releases the compression, the elastic body 121 undergoes elastic reset.
[0040] Specifically, in practical applications, when the electrolyte inside the battery cell is continuously consumed, a large amount of gas is generated inside the housing 210, and the gas enters the ventilation cavity 111 from the air inlet 112. As the pressure of the gas increases, the gas input from the air inlet 112 can push the plug 130 to move, and the plug 130 can move from the aforementioned first position to the second position. During this process, on the one hand, the gas can flow from the air inlet 112 to the air outlet 113 and finally be discharged from the air outlet 113, realizing the function of discharging the gas inside the housing 210 and reducing the internal pressure of the housing 210, effectively enhancing the stability of the battery 200; on the other hand, the plug 130 can squeeze the elastic body 121, the elastic body 121 is compressed and undergoes elastic deformation, and the internal liquid can be squeezed into the second branch 123, and then the second branch 123 inputs the electrolyte into the interior of the housing 210 through the liquid replenishment pipeline 115, realizing the function of replenishing the battery cell with liquid and extending the cycle life of the battery 200.
[0041] After the gas content in the housing 210 decreases, the pressure of the gas on the plug 130 is less than the gravity of the plug 130. In this way, under the action of its own gravity, the plug 130 can move from the second position to the first position. During this process, on the one hand, the plug 130 can block the air inlet 112 and the air outlet 113, preventing the electrolyte inside the housing 210 from overflowing from the air inlet 112 and preventing external gas from entering the ventilation cavity through the air outlet 113; on the other hand, after the plug 130 releases the compression of the elastic body 121, the elastic body 121 undergoes elastic reset, and the elastic body 121 can absorb and store the liquid sucked by the first branch 122 from the liquid storage cavity 114. When the plug 130 squeezes the elastic body 121 again next time, the elastic body 121 squeezes the stored liquid into the second branch 123 again, realizing the function of circularly replenishing the battery cell with liquid.
[0042] In one embodiment, the elastic liquid absorbing member 120 may include sponge, gauze, absorbent cotton, etc.
[0043] In one embodiment, the first branch 122 is slender, which is beneficial for the first branch 122 to extend deep into the liquid storage cavity 114 to suck the electrolyte.
[0044] In one embodiment, the second branch 123 is slender, so that the second branch 123 can extend along the liquid replenishment pipeline 115 to a position close to the liquid replenishment port, and can more accurately guide the electrolyte to the liquid replenishment port, reducing the loss of the electrolyte during the liquid replenishment process.
[0045] Such as Figure 2 and Figure 3As shown, the exhaust and liquid replenishing device 100 may further include a first waterproof and breathable membrane 140. The first waterproof and breathable membrane 140 is disposed at the air inlet 112. In this way, when the blocking body 130 opens the air inlet 112, the waterproof and breathable membrane can prevent the electrolyte inside the housing 210 from overflowing from the air inlet 112 while allowing gas to pass through, and prevent the electrolyte from flowing into the breathable cavity 111.
[0046] As Figure 2 and Figure 3 shown, the exhaust and liquid replenishing device 100 may further include a second waterproof and breathable membrane 150. The second waterproof and breathable membrane 150 is disposed at the air outlet 113. In this way, when the blocking body 130 opens the air outlet 113, the waterproof and breathable membrane can prevent the electrolyte from being discharged to the external environment through the air outlet 113 while allowing gas to pass through.
[0047] In one embodiment, the first waterproof and breathable membrane 140 and the second waterproof and breathable membrane 150 may be made of polytetrafluoroethylene, polyester fiber or polyurethane.
[0048] As Figure 2 and Figure 3 shown, one end of the first branch 122 away from the elastic body 121 abuts against the bottom wall of the liquid storage cavity 114. In this way, when the electrolyte content in the liquid storage cavity 114 is low, the first branch 122 can still contact the electrolyte, so as to fully absorb the electrolyte in the liquid storage cavity 114 and reduce electrolyte waste.
[0049] As Figure 2 and Figure 3 shown, a partition 170 is provided in the box body 110. The breathable cavity 111 and the liquid storage cavity 114 are respectively provided on opposite sides of the partition 170. The partition 170 is provided with a through hole 171, and the through hole 171 communicates the breathable cavity 111 and the liquid storage cavity 114. The first branch 122 can extend from the elastic body 121 to the liquid storage cavity 114 through the through hole 171, so as to realize the above-mentioned function of absorbing the electrolyte in the liquid storage cavity 114.
[0050] It should be understood that the partition 170 can relatively isolate the breathable cavity 111 and the liquid storage cavity 114. While ensuring that the first branch 122 can extend into the liquid storage cavity 114 through the through hole 171, it can prevent the electrolyte in the liquid storage cavity 114 from entering the breathable cavity 111.
[0051] It should be noted that as Figure 3As shown, when the plug body 130 is in the aforementioned second position, the elastic body 121 is compressed by the plug body 130 to its minimum volume. At this time, the height position of the bottom wall of the elastic body 121 is lower than the height position of the top wall of the through hole 171. In this way, when the elastic body 121 is compressed to the limit, it can still ensure that the area between the bottom wall of the elastic body 121 and the top wall of the through hole 171 can pass through the first branch 122, avoiding the situation where the first branch 122 is crushed during the compression of the elastic body 121.
[0052] Furthermore, as Figure 3 shown, when the plug body 130 is in the aforementioned second position, the height position of the top wall of the plug body 130 is higher than the height position of the bottom wall of the through hole 171. In this way, under the combined action of the elastic body 121 and the plug body 130, it can prevent the electrolyte in the liquid storage cavity 114 from entering the ventilation cavity 111 through the through hole 171.
[0053] In an embodiment, the maximum width of the first branch 122 can be less than the aperture of the through hole 171, can also be equal to the aperture of the through hole 171, or can also be greater than the aperture of the through hole 171 (since the first branch 122 can undergo elastic deformation and has scalability).
[0054] As Figure 2 shown, when the plug body 130 is in the first position, the height position of the top wall of the plug body 130 is higher than the height position of the top wall of the air outlet 113. In this way, when the plug body 130 is in the first position, it can completely block the air outlet 113, avoiding the entry of external gas into the ventilation cavity 111 through the air outlet 113 under normal circumstances, which may affect the normal operation of the exhaust and liquid filling device 100 and the battery cell.
[0055] As Figure 3 shown, when the plug body 130 is in the second position, the height position of the bottom wall of the plug body 130 is higher than the height position of the top wall of the air outlet 113. In this way, during the exhaust process, the air outlet 113 can be completely opened, which is beneficial to achieving rapid exhaust and improving the exhaust efficiency.
[0056] As Figure 2 and Figure 3 shown, one end of the liquid filling pipeline 115 far from the ventilation cavity 111 is provided with an output port 116. In practical applications, this output port 116 is communicated with the liquid discharge port of the housing 210. The electrolyte transported by the second branch 123 can enter the interior of the housing 210 through the output port 116 and the liquid discharge port to supplement the electrolyte for the battery cell.
[0057] As Figure 4An exploded schematic diagram of an isolating member provided by an exemplary embodiment of the present application. Figures 2 to 4 The exhaust and fluid replenishment device 100 may further include an isolation member 160, which is disposed in the output port 116. On the one hand, the liquid output from the fluid replenishment pipe 115 may enter the shell 210 through the isolation member 160 to achieve the fluid replenishment effect; on the other hand, the isolation member 160 may prevent the gas in the shell 210 from entering the fluid replenishment pipe 115 through the output port 116.
[0058] Specifically, combined Figures 2 to 4 The isolation member 160 may include a plastic sheet 161 and an elastic sheet 162, the plastic sheet 161 is provided with a plurality of first through holes 1611, the elastic sheet 162 is stacked with the plastic sheet 161, and the elastic sheet 162 is located on the side of the plastic sheet 161 away from the infusion pipe 115, and the elastic sheet 162 is provided with a plurality of second through holes 1621.
[0059] It should be noted that the plurality of first through holes 1611 and the plurality of second through holes 1621 are cross-distributed, so that any first through hole 1611 is not connected to any second through hole 1621 . In this way, on the one hand, in the process of the electrolyte in the fluid replenishment pipe 115 passing through the output port 116, the electrolyte first passes through the first through hole 1611, and then the electrolyte applies pressure to the elastic sheet 162, the elastic sheet 162 undergoes elastic deformation, and a gap is formed between the elastic sheet 162 and the plastic sheet 161. After the electrolyte enters the gap, it passes through the second through hole 1621, and then flows from the output port 116 to the inside of the shell 210 to replenish the electrolyte for the battery cell; on the other hand, after the gas inside the shell 210 passes through the output port 116 and the second through hole 1621, since the plastic sheet 161 will not undergo elastic deformation, no gap will be generated between the plastic sheet 161 and the elastic sheet 162, and the gas cannot further pass through the first through hole 1611, thereby achieving the effect of blocking the gas in the shell 210 from entering the fluid replenishment pipe 115.
[0060] In one embodiment, the plastic sheet 161 can be made of metal plastic materials (such as copper, aluminum), polymer plastic materials (such as polyethylene, polypropylene), and other materials.
[0061] In one embodiment, the elastic sheet 162 can be made of rubber, silicone, polyurethane elastomer, polyester elastomer, etc.
[0062] The basic principles of the present application have been described above in connection with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not limitations, and it cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. Additionally, the specific details disclosed above are for illustrative and facilitating understanding purposes only, and not limitations. These details do not limit the present application to necessarily implementing with the above specific details.
[0063] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used herein refer to the word "and / or", and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with each other.
[0064] It should also be noted that in the devices, equipment, and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application.
[0065] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.
[0066] The above description has been given for purposes of illustration and description. This description does not intend to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.
Claims
1. An exhaust and liquid replenishment device, characterized in that, include: The box body (110) is provided with a ventilating cavity (111), an air inlet (112), an air outlet (113), a liquid storage cavity (114) and a liquid replenishing pipe (115), wherein the air inlet (112), the air outlet (113), the liquid storage cavity (114) and the liquid replenishing pipe (115) are all in communication with the ventilating cavity (111); The elastic liquid-absorbing member (120) comprises an elastic body (121), a first branch (122) and a second branch (123), wherein the elastic body (121) is arranged in the air-permeable cavity (111), the first branch (122) is connected to the elastic body (121), the first branch (122) extends into the liquid storage cavity (114), the second branch (123) is connected to the elastic body (121), and the second branch (123) extends into the liquid infusion pipe (115); The blocking body (130) is disposed in the air permeable cavity (111), and the blocking body (130) is supported on the elastic body (121).
2. The exhaust and liquid replenishment device according to claim 1, characterized in that The exhaust and liquid replenishing device further comprises: a first waterproof and breathable membrane (140), disposed at the air inlet (112); and / or, The second waterproof and breathable membrane (150) is arranged at the air outlet (113).
3. The exhaust and liquid replenishment device according to claim 1, characterized in that, An output port (116) is provided at one end of the liquid infusion pipe (115) away from the air permeable cavity (111); The exhaust and liquid replenishing device further comprises: The isolating member (160) is disposed in the output port (116), and is used to allow the liquid in the fluid infusion pipe (115) to pass through, and to prevent the gas outside the output port (116) from entering the fluid infusion pipe (115).
4. The exhaust and liquid replenishing device according to claim 3, wherein, The isolating member (160) comprises: A plastic sheet (161) provided with a plurality of first through holes (1611); an elastic sheet (162) which is stacked and distributed with the plastic sheet (161), and the elastic sheet (162) is located on a side of the plastic sheet (161) away from the infusion pipe (115), and the elastic sheet (162) is provided with a plurality of second through holes (1621); Wherein, the plurality of first through holes (1611) and the plurality of second through holes (1621) are cross-distributed so that any first through hole (1611) and any second through hole (1621) are not interconnected.
5. The exhaust fluid replenishing device according to any one of claims 1 to 4, characterized in that One end of the first branch (122) away from the elastic body (121) abuts against the bottom wall of the liquid storage cavity (114).
6. The exhaust fluid replenishing device according to any one of claims 1 to 4, characterized in that When the blocking body (130) is in the first position, the height position of the top wall of the blocking body (130) is higher than the height position of the top wall of the air outlet (113).
7. The exhaust liquid supplementing device according to any one of claims 1 to 4, characterized in that, When the blocking body (130) is in the second position, the height position of the bottom wall of the blocking body (130) is higher than the height position of the top wall of the air outlet (113).
8. The exhaust liquid replenishing device according to any one of claims 1 to 4, characterized in that A partition (170) is provided inside the box body (110). The air permeable cavity (111) and the liquid storage cavity (114) are respectively provided on opposite sides of the partition (170). The partition (170) is provided with a through hole (171), and the through hole (171) communicates the air permeable cavity (111) and the liquid storage cavity (114). The first branch (122) extends from the elastic body (121) into the liquid storage cavity (114) through the through hole (171).
9. The exhaust and liquid replenishment device according to claim 8, wherein, When the plug body (130) is in the second position, the height position of the bottom wall of the elastic body (121) is lower than the height position of the top wall of the through hole (171).
10. A battery, characterized in that, Comprising: A housing (210) with an electric core provided inside. The housing (210) is provided with an exhaust port and a liquid replenishment port; The exhaust and liquid replenishment device according to any one of claims 1 to 9, the box body (110) is provided on the outer wall of the housing (210), and the air inlet (112) is communicated with the exhaust port, One end of the liquid replenishment pipeline (115) far away from the air permeable cavity (111) is communicated with the liquid replenishment port.