An encapsulation device for electrochemical energy storage devices

Abstract

The present invention discloses a packaging device for an electrochemical energy storage device, belonging to the technical field of electrochemical energy storage devices, including a battery body and a cover structure. An encapsulation accommodating groove for accommodating the cover structure is provided on the battery body, and an annular barrier groove is provided on the bottom wall of the encapsulation accommodating groove; the cover structure includes an encapsulation cover plate, and a remedial strong plugging component and a sealing component are respectively provided at the bottom of the encapsulation cover plate. When the cover structure is packaged on the battery body, the gap between the cover structure and the battery body is sealed by the sealing component located outside the remedial strong plugging component in the cover structure. And when the sealing component fails due to fatigue aging, the liquid invading is captured by the annular barrier groove for accommodating the remedial strong plugging component in the battery body, isolating the invading liquid from the liquid injection hole on the battery body. And after the remedial strong plugging component absorbs the liquid in the annular barrier groove, it can reversely apply a downward pressure to the sealing component.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical energy storage devices, and particularly to a packaging device for electrochemical energy storage devices. Background Art

[0002] In existing electrochemical energy storage device products such as lead-acid batteries and lead-carbon batteries, when in use, they are connected to external devices through pole columns to meet the power supply requirements. During use, when they are in a power-fed state, it is necessary to replace and add the internal acid-base solution. Therefore, it is necessary to remove multiple groups of liquid injection caps on the battery top cover and perform liquid injection operations through the liquid injection holes.

[0003] However, in current electrochemical energy storage device products such as lead-acid batteries and lead-carbon batteries, the sealing method mostly uses rubber seals. When the rubber seals are under the long-term loading of the top cover above the liquid injection holes and under the long-term influence of the high temperature generated during the operation of the energy storage device, it will accelerate the process of material fatigue aging of the seals, easily cause the seals to deform, thereby losing tightness, resulting in a decline in the sealing performance of the electrochemical energy storage device products, making the traditional packaging form of the electrochemical energy storage device products difficult to resist the erosion of external liquids. Especially in the case of sudden heavy rain and a large amount of accumulated water in summer, it is extremely easy for electric bicycles and other power tools equipped with electrochemical energy storage device products to be flooded. When the accumulated water invades the product interior and then flows into the liquid injection holes, it will cause performance deterioration and product failure. Summary of the Invention

[0004] In order to improve the sealing performance of energy storage devices, the present application provides a packaging device for electrochemical energy storage devices.

[0005] The present application provides a packaging device for electrochemical energy storage devices, adopting the following technical solutions:

[0006] A packaging device for electrochemical energy storage devices includes a battery body and a cover structure. The battery body is provided with a packaging containment groove for accommodating the cover structure, and a ring-shaped barrier groove is provided on the bottom wall of the packaging containment groove;

[0007] The cover structure includes a packaging cover plate. The bottom of the packaging cover plate is respectively provided with a remedial strong plugging component that can be movably inserted into the ring-shaped barrier groove and a sealing component located on the outer periphery of the remedial strong plugging component. The sealing component includes a corrugated telescopic sleeve connected to the bottom of the packaging cover plate. The other end of the corrugated telescopic sleeve is connected with a ring-shaped carrier, and the bottom end of the ring-shaped carrier is connected with a ring-shaped sealing gasket;

[0008] The remedial strong plugging component includes a ring-shaped water blocking seat connected to the bottom of the packaging cover plate. A rectangular execution groove is provided at the bottom end of the ring-shaped water blocking seat, and a sensing driving member connected to the ring-shaped carrier in the sealing component is provided in the rectangular execution groove;

[0009] The sensing driving member includes water-swellable particles, a material blocking baffle, and a passive annular frame that slides in a rectangular execution groove. A circle of reserved grooves is provided on the passive annular frame, and an elastic annular elastic diaphragm is connected in the reserved grooves.

[0010] A plurality of U-shaped frames are evenly connected to the passive annular frame, and an overflow prevention and absorption member that cooperates with the U-shaped frame is provided on the side of the U-shaped frame.

[0011] A return spring is connected to the U-shaped frame.

[0012] A plurality of flow holes are evenly formed in the material blocking baffle, and a flexible waterproof coating layer is adhered to the surface of the material blocking baffle at the position corresponding to the flow holes.

[0013] Optionally, the U-shaped frame includes a horizontal section, and a first vertical section and a second vertical section are respectively provided at both ends of the horizontal section.

[0014] A wedge-shaped portion is connected to the side of the first vertical section close to the overflow prevention and absorption member.

[0015] Optionally, a positioning chamber for the horizontal section in the U-shaped frame to move vertically is formed at each position corresponding to the U-shaped frame on the outer ring wall of the annular water blocking seat.

[0016] The horizontal section slides up and down in the corresponding positioning chamber.

[0017] The end of the first vertical section far from the horizontal section is connected to the passive annular frame, and the end of the first vertical section far from the passive annular frame vertically slides into the positioning chamber through the rectangular execution groove and is connected to the horizontal section.

[0018] The end of the second vertical section far from the horizontal section is connected to the annular carrier frame.

[0019] Optionally, one end of the return spring is connected to the horizontal section in the U-shaped frame, and the other end is connected to the bottom wall of the positioning chamber.

[0020] Optionally, a plate groove for accommodating the material blocking baffle and communicating with the rectangular execution groove is formed on the outer ring wall of the annular water blocking seat, and the material blocking baffle is connected in the plate groove.

[0021] The water-swellable particles in the sensing driving member are filled in the space surrounded by the material blocking baffle, the rectangular execution groove, the passive annular frame, and the annular elastic diaphragm.

[0022] Optionally, the overflow prevention and absorption member includes a fixed outer frame and a synchronous push plate, and a passive convex portion is connected to the side of the synchronous push plate close to the wedge-shaped portion.

[0023] A plurality of thorn film needles are evenly connected to the other side of the synchronous push plate.

[0024] A barrier film is connected inside the cavity of the fixed outer frame;

[0025] The anti-overflow absorption member also includes water-swellable particles.

[0026] Optionally, a side groove communicating with the positioning chamber is formed on the inner ring wall of the annular water-blocking seat;

[0027] The synchronous push plate slides horizontally in the side groove, and one end of the wedge portion away from the first vertical section extends into the side groove;

[0028] The fixed outer frame is connected to the inner ring wall of the annular water-blocking seat and covers the opening at the end of the side groove.

[0029] Optionally, the water-swellable particles in the anti-overflow absorption member are filled in the space surrounded by the side groove, the synchronous push plate, the fixed outer frame and the barrier film.

[0030] Optionally, the tip of the puncturing film needle faces the barrier film.

[0031] In summary, the present application includes the following beneficial technical effects:

[0032] 1. When the cover structure is encapsulated on the battery body, the gap between the cover structure and the annular barrier groove is sealed by the sealing component. And when the sealing component fails due to fatigue aging, the annular barrier groove captures the invading liquid, isolates the invading liquid from the liquid injection hole on the battery body. And after the strong plugging component absorbs the liquid in the annular barrier groove, it can reversely apply a downward pressure to the sealing component, which can directly reduce the gap between the sealing surface of the sealing component and the bottom wall of the encapsulation accommodating groove, so as to temporarily restore the sealing performance of the sealing component, prevent further invasion of external liquid, thereby preventing further damage to the internal structure of the energy storage device by the liquid, prolonging the service life of the electrochemical energy storage device, and also being beneficial to improving the reliability and safety of the operation of the electrochemical energy storage device product.

[0033] 2. After the liquid in the annular barrier groove comes into contact with the water-swellable particles in the sensing driving member, the water-swellable particles rapidly expand in volume after absorption and drive the annular sealing gasket in the sealing component to move downward through the U-shaped frame, so as to reversely apply a downward pressure to the sealing component and reduce the gap between the sealing surface of the sealing component and the bottom wall of the encapsulation accommodating groove, forming a first protection barrier, and further preventing further invasion of external liquid.

[0034] 3. After the water-swellable particles in the sensing driving member absorb the liquid and reversely apply a downward pressure to the sealing assembly, when the water-swellable particles that absorb water and expand drive the passive annular frame to be restricted, the pressure of the water-swellable particles that further expand in volume after absorbing water on the inner wall of the annular elastic diaphragm increases and drives the annular elastic diaphragm to elastically bulge outwards, so that the annular elastic diaphragm that undergoes elastic deformation closely adheres to the bottom wall of the annular barrier groove, thereby further blocking the channel for liquid intrusion, and on the basis of the first protection barrier, a second protection barrier is formed again, effectively separating the liquid from the liquid injection hole on the battery body, and improving the encapsulation and sealing effect between the battery body and the cover structure.

[0035] 4. When the sensing driving member located inside the annular barrier groove contacts the liquid and drives the U-shaped frame to move downward, the U-shaped frame drives the passive convex part in the anti-overflow absorbing member to move horizontally through the wedge-shaped part thereon. During this process, the puncturing needle pierces the blocking film, and the moving synchronous push plate continuously pushes the water-swellable particles into the space surrounded by the inner ring wall of the annular water-blocking seat and the annular barrier groove. After the second protection barrier is formed by the water-swellable particles, the remaining liquid in the annular barrier groove is absorbed, preventing the liquid from overflowing with the shaking of the electrochemical energy storage device and flowing into the liquid injection hole on the battery body, thereby further forming a protection barrier. This triple protection mechanism can minimize the potential damage to the electrochemical energy storage device after liquid intrusion and ensure the encapsulation and sealing effect between the battery body and the cover structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the overall structure of the present application;

[0037] Figure 2 for the present application Figure 1 is a partially enlarged schematic view of part B in the present application;

[0038] Figure 3 for the present application Figure 1 is a partially enlarged schematic view of part A in the present application;

[0039] Figure 4 is a schematic diagram of the cover structure in the present application;

[0040] Figure 5 for the present application Figure 4 is a partially enlarged schematic view of part C in the present application;

[0041] Figure 6 is a partially enlarged sectional view of the cover structure in the present application;

[0042] Figure 7 for the present application Figure 6 is a partially enlarged schematic view of part D in the present application;

[0043] Figure 8 For this application Figure 6 is a partially enlarged schematic view of part E in the application.

[0044] Explanation of reference numerals:

[0045] 101, battery main body; 102, encapsulation containment groove; 103, annular barrier groove;

[0046] 201, encapsulation cover plate; 202, annular water-blocking seat; 203, corrugated expansion sleeve; 204, annular carrier; 205, annular sealing gasket; 206, flexible waterproof film layer; 207, fixed outer frame; 208, blocking film; 209, passive annular frame; 210, annular elastic diaphragm; 212, return spring; 213, material-blocking baffle; 214, water-swellable particles; 215, wedge-shaped part; 216, synchronous push plate; 217, passive convex part; 218, film-piercing needle; 219, first vertical section; 220, horizontal section; 221, second vertical section. Detailed implementation manners

[0047] The following further elaborates on this application Figure 1-8 in conjunction with the appended drawings.

[0048] Referring to Figures 1 to 6 , an embodiment of this application provides a packaging device for an electrochemical energy storage device, including a battery main body 101 and a cover structure. An encapsulation containment groove 102 for accommodating the cover structure is provided on the battery main body 101, and an annular barrier groove 103 is provided on the bottom wall of the encapsulation containment groove 102;

[0049] The cover structure includes an encapsulation cover plate 201. A remedial strong plugging assembly that can be movably inserted into the annular barrier groove 103 and a sealing assembly located on the outer periphery of the remedial strong plugging assembly are respectively provided at the bottom of the encapsulation cover plate 201. The sealing assembly includes a corrugated expansion sleeve 203 connected to the bottom of the encapsulation cover plate 201. The other end of the corrugated expansion sleeve 203 is connected to an annular carrier 204, and the bottom end of the annular carrier 204 is connected to an annular sealing gasket 205;

[0050] The remedial strong plugging assembly includes an annular water-blocking seat 202 connected to the bottom of the encapsulation cover plate 201. A rectangular execution groove is provided at the bottom end of the annular water-blocking seat 202, and a sensing driving member connected to the annular carrier 204 in the sealing assembly is provided in the rectangular execution groove.

[0051] The electrochemical energy storage device in this application is a lead-acid battery or a lead-carbon battery.

[0052] When encapsulating the cover structure on the battery body 101, the gap between the cover structure and the annular barrier groove 103 is sealed by the sealing component located outside the peripheral of the remedial plugging component in the cover structure. And when the sealing component suffers from fatigue aging and causes sealing failure, the annular barrier groove 103 in the battery body 101 that is used to accommodate the remedial plugging component captures the invaded liquid, isolates the invaded liquid from the liquid injection hole on the battery body 101. And after the remedial plugging component absorbs the liquid in the annular barrier groove 103, it can reversely apply a downward pressure to the sealing component, which can directly reduce the gap between the sealing surface of the sealing component and the bottom wall of the encapsulation containment groove 102, so as to achieve the effect of temporarily restoring the sealing performance of the sealing component, preventing further invasion of external liquid, thus preventing further damage to the internal structure of the energy storage device by the liquid, prolonging the service life of the electrochemical energy storage device, and also being beneficial to improving the reliability and safety of the operation of the electrochemical energy storage device product.

[0053] Referring to Figures 4 to 7 , an encapsulation device for an electrochemical energy storage device is provided in an embodiment of the present application. The sensing driving member includes water-swellable particles 214, a material blocking baffle 213, and a passive annular frame 209 that slides in a rectangular execution groove. The water-swellable particles 214 are made of a superabsorbent resin;

[0054] A reserved groove is provided on the passive annular frame 209, and an elastic annular elastic diaphragm 210 is connected in the reserved groove. The annular elastic diaphragm 210 is preferably made of a rubber material;

[0055] A plate groove that can accommodate the material blocking baffle 213 and is communicated with the rectangular execution groove is opened on the outer ring wall of the annular water blocking seat 202, and the material blocking baffle 213 is connected in the plate groove. The water-swellable particles 214 in the sensing driving member are filled in the space surrounded by the material blocking baffle 213, the rectangular execution groove, the passive annular frame 209, and the annular elastic diaphragm 210;

[0056] A plurality of U-shaped frames are evenly connected to the passive annular frame 209, and an overfill absorption member that cooperates with it is provided on the side of the U-shaped frame;

[0057] A return spring 212 is connected to the U-shaped frame;

[0058] A plurality of flow holes are evenly opened on the material blocking baffle 213, and the inner diameter of the flow holes is smaller than the outer diameter of the water-swellable particles 214;

[0059] A flexible waterproof coating layer 206 with a waterproof function is adhered to the surface of the material blocking baffle 213 at the position corresponding to the flow holes.

[0060] Before the encapsulation cover plate 201 in the cover structure is connected inside the encapsulation containment groove 102, first tear off the flexible waterproof film layer 206 adhered to the surface of the material blocking baffle 213. Subsequently, when connecting the encapsulation cover plate 201 to the inside of the encapsulation containment groove 102, after sealing the gap between the encapsulation cover plate 201 and the encapsulation containment groove 102 through the sealing component in the cover assembly, the bottom end of the annular water blocking seat 202 in the remedial strong plugging component inserted into the annular blocking groove 103 is in contact with the bottom wall of the annular blocking groove 103.

[0061] Referring Figure 6 and Figure 7 In the embodiment of the present application, a packaging device for an electrochemical energy storage device is provided. The U-shaped frame includes a horizontal section 220, and a first vertical section 219 and a second vertical section 221 are respectively provided at both ends of the horizontal section 220;

[0062] A wedge-shaped portion 215 is connected to the side of the first vertical section 219 close to the overflow absorption member;

[0063] A positioning chamber for the horizontal section 220 in the U-shaped frame to move vertically is provided at each position corresponding to the U-shaped frame on the outer ring wall of the annular water blocking seat 202;

[0064] The horizontal section 220 slides up and down in the corresponding positioning chamber. One end of the return spring 212 is connected to the horizontal section 220 in the U-shaped frame, and the other end is connected to the bottom wall of the positioning chamber;

[0065] One end of the first vertical section 219 far from the horizontal section 220 is connected to the passive annular frame 209, and one end of the first vertical section 219 far from the passive annular frame 209 vertically slides into the positioning chamber through the rectangular execution groove and is connected to the horizontal section 220;

[0066] One end of the second vertical section 221 far from the horizontal section 220 is connected to the annular carrier 204.

[0067] When the liquid in the annular blocking groove 103 flows into the flow holes on the material blocking baffle 213 in the remedial strong plugging component and contacts the water-swellable particles 214 in the sensing driving member, the water-swellable particles 214 rapidly expand in volume after absorption and drive the annular sealing gasket 205 in the sealing component to move downward through the U-shaped frame, thereby achieving the effect of applying a downward pressure to the sealing component in the reverse direction and reducing the gap between the sealing surface of the sealing component and the bottom wall of the encapsulation containment groove 102, forming a first protective barrier, and further preventing the further intrusion of external liquid.

[0068] After the water-swellable particles 214 in the sensing driving member absorb liquid and apply a downward pressure to the sealing assembly in the reverse direction, when the water-swellable particles 214 that have swelled due to water absorption drive the passive annular frame 209 to be restricted, the water-swellable particles 214 that further expand in volume after water absorption increase the pressure on the inner wall of the annular elastic diaphragm 210 and drive the annular elastic diaphragm 210 to elastically bulge outwards, so that the annular elastic diaphragm 210 that has undergone elastic deformation closely adheres to the bottom wall of the annular barrier groove 103, thereby further blocking the channel for liquid intrusion, and on the basis of the first protection barrier, a second protection barrier is formed again, effectively separating the liquid from the liquid injection hole on the battery body 101, and improving the encapsulation and sealing effect between the battery body 101 and the cover structure.

[0069] Referring Figure 6 and Figure 8 In the embodiments of the present application, a packaging device for an electrochemical energy storage device is provided. The anti-overflow absorption member includes a fixed outer frame 207 and a synchronous push plate 216. A passive protrusion 217 is connected to one side of the synchronous push plate 216 close to the wedge portion 215;

[0070] On the other side of the synchronous push plate 216, a plurality of film-piercing needles 218 are evenly connected. A blocking film 208 is connected in the inner cavity of the fixed outer frame 207, and the tip of the film-piercing needle 218 faces the blocking film 208;

[0071] The anti-overflow absorption member also includes water-swellable particles 214;

[0072] A side groove communicating with the positioning chamber is formed on the inner ring wall of the annular water-blocking seat 202;

[0073] The synchronous push plate 216 slides horizontally in the side groove, and one end of the wedge portion 215 away from the first vertical section 219 extends into the side groove. The water-swellable particles 214 in the anti-overflow absorption member are filled in the space surrounded by the side groove, the synchronous push plate 216, the fixed outer frame 207 and the blocking film 208;

[0074] The fixed outer frame 207 is connected to the inner ring wall of the annular water-blocking seat 202 and covers the end opening of the side groove.

[0075] When the sensing driving member located inside the annular barrier groove 103 contacts the liquid and drives the U-shaped frame to move downward, the U-shaped frame drives the passive convex part 217 in the anti-overflow absorption member to move horizontally through the wedge part 215 thereon. During this process, the puncturing film needle 218 that moves synchronously with the passive convex part 217 punctures the blocking film 208. The moving synchronous push plate 216 then continuously pushes the water-swellable particles 214 in the sensing driving member into the space surrounded by the inner ring wall of the annular water-blocking seat 202 and the annular barrier groove 103. After the second protection barrier is formed by the water-swellable particles 214 falling into the annular barrier groove 103, the remaining liquid in the space surrounded by the inner ring wall of the annular water-blocking seat 202 and the annular barrier groove 103 is absorbed, preventing the liquid from overflowing and flowing into the liquid injection hole on the battery main body 101 as the electrochemical energy storage device shakes. Further, a protection barrier is formed. This triple protection mechanism can minimize the potential damage to the electrochemical energy storage device after liquid intrusion and ensure the encapsulation and sealing effect between the battery main body 101 and the cover structure.

[0076] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An encapsulation device for an electrochemical energy storage device, characterized in that: It includes a battery main body and a cover structure. There is a packaging accommodating groove on the battery main body for accommodating the cover structure, and an annular barrier groove is provided on the bottom wall of the packaging accommodating groove; The cover structure includes a packaging cover plate. At the bottom of the packaging cover plate, there are respectively a remedial strong plugging component that can be movably inserted into the inside of the annular barrier groove and a sealing component located on the outer periphery of the remedial strong plugging component. The sealing component includes a corrugated expansion sleeve connected to the bottom of the packaging cover plate. The other end of the corrugated expansion sleeve is connected with an annular carrier, and the bottom end of the annular carrier is connected with an annular sealing gasket; The remedial strong plugging component includes an annular water-blocking seat connected to the bottom of the packaging cover plate. A rectangular execution groove is provided at the bottom end of the annular water-blocking seat, and a sensing driving part connected to the annular carrier in the sealing component is arranged in the rectangular execution groove; The sensing driving part includes water-swellable particles, a material-blocking baffle, and a passive annular frame sliding in the rectangular execution groove. A circle of reserved grooves is provided on the passive annular frame, and an elastic annular elastic diaphragm is connected in the reserved grooves; A plurality of U-shaped frames are evenly connected to the passive annular frame, and anti-overflow absorption parts that cooperate with the U-shaped frames are arranged on the sides of the U-shaped frames; A return spring is connected to the U-shaped frame; A plurality of flow holes are evenly opened on the material-blocking baffle, and a flexible waterproof coating layer is adhered to the surface of the material-blocking baffle at the positions corresponding to the flow holes; 2. The encapsulation device for an electrochemical energy storage device according to claim 1, characterized in that: The U-shaped frame includes a horizontal section, and a first vertical section and a second vertical section are respectively arranged at both ends of the horizontal section; A wedge-shaped part is connected to the side of the first vertical section close to the anti-overflow absorption part; 3. The encapsulation device for an electrochemical energy storage device according to claim 2, wherein: On the outer ring wall of the annular water-blocking seat, a positioning chamber for the horizontal section in the U-shaped frame to move vertically is opened at each position corresponding to the U-shaped frame; The horizontal section slides up and down in the corresponding positioning chamber; The end of the first vertical section far from the horizontal section is connected to the passive annular frame, and the end of the first vertical section far from the passive annular frame vertically slides into the positioning chamber from the rectangular execution groove and is connected to the horizontal section; The end of the second vertical section far from the horizontal section is connected to the annular carrier; 4. A packaging device for an electrochemical energy storage device according to claim 3, characterized in that: One end of the return spring is connected to the horizontal section in the U-shaped frame, and the other end is connected to the bottom wall of the positioning chamber; 5. The encapsulation device for an electrochemical energy storage device according to claim 1, wherein: On the outer ring wall of the annular water-blocking seat, a plate groove for accommodating the material-blocking baffle and communicating with the rectangular execution groove is opened, and the material-blocking baffle is connected in the plate groove; The water-swellable particles in the sensing driving part are filled in the space surrounded by the material-blocking baffle, the rectangular execution groove, the passive annular frame, and the annular elastic diaphragm; 6. The packaging device for an electrochemical energy storage device according to claim 3, wherein: The anti-overflow absorption part includes a fixed outer frame and a synchronous push plate. A passive convex part is connected to the side of the synchronous push plate close to the wedge-shaped part; A plurality of thorned film needles are evenly connected to the other side of the synchronous push plate; A blocking film is connected in the inner cavity of the fixed outer frame; The anti-overflow absorption part also includes water-swellable particles; 7. A packaging device for an electrochemical energy storage device according to claim 6, characterized in that: On the inner ring wall of the annular water-blocking seat, a side groove communicating with the positioning chamber is opened; The synchronous push plate slides horizontally in the side groove, and the end of the wedge-shaped part far from the first vertical section extends into the side groove; The fixed outer frame is connected to the inner ring wall of the annular water-blocking seat and covers the end opening of the side groove; 8. A packaging device for an electrochemical energy storage device according to claim 7, characterized in that: The water-swellable particles in the anti-overflow absorbent member are filled in the space enclosed by the side groove, the synchronous push plate, the fixed outer frame and the blocking film.

9. The encapsulation device for an electrochemical energy storage device according to claim 6, characterized in that: The pointed portion of the puncturing film needle faces the blocking film.

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