A sealing structure and a single cell

Abstract

The present invention relates to the technical field of power batteries, and particularly relates to a sealing structure and a single cell. The sealing structure includes: a fixing plate, which is provided with a sealing groove, and a communication port is provided on the bottom wall of the sealing groove; a sealing unit, which is arranged in the sealing groove to cover and seal the communication port; a pressing unit, which is arranged in the sealing groove to press the sealing unit; the pressing unit is detachably and fixedly connected to the fixing plate. The sealing structure provided by the present invention adjusts the extrusion force of the sealing unit through the assembly and disassembly of the pressing unit and the sealing groove, and further realizes the switching between the first state and the second state of the communication port, realizes the multiple filling of the heat-conducting medium, and is beneficial to extending the service life of the battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and particularly to a sealing structure and a single cell battery. Background Art

[0002] Lithium-ion batteries have been widely used in the field of new energy vehicles due to their excellent performance. Without changing the battery chemical system, in order to further improve the energy density of the battery pack system, the battery cells are made longer and larger. Subsequently, the heat dissipation problem will seriously affect the service life of the battery. Therefore, it is necessary to fill a heat-conducting medium between the bare battery cell and the inner wall of the housing to dissipate heat from the battery cell and extend the service life of the battery.

[0003] However, the existing power battery cells usually have a non-detachable fixed structure, and the heat-conducting medium can only be filled once. When the heat-conducting medium is consumed and reduced to a certain extent, the power battery cell cannot be cooled quickly, seriously affecting the service life of the battery.

[0004] Under conditions such as overcharging, over-discharging, and high-temperature floating charging of the power battery, the battery will bulge or expand, seriously affecting the life and safety performance of the power battery. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the heat-conducting medium of the power battery cell in the prior art can only be filled once, so as to provide a sealing structure capable of realizing multiple filling of the heat-conducting medium.

[0006] Another technical problem to be solved by the present invention is to overcome the defect that the heat-conducting medium of the power battery cell in the prior art can only be filled once, so as to provide a single cell battery capable of realizing multiple filling of the heat-conducting medium.

[0007] To solve the above technical problems, the sealing structure provided by the present invention includes:

[0008] A fixing plate, provided with a sealing groove, and a communication port is opened on the bottom wall of the sealing groove;

[0009] A sealing unit, disposed in the sealing groove to seal the communication port;

[0010] A pressing unit, disposed in the sealing groove to press the sealing unit; the pressing unit is detachably and fixedly connected to the fixing plate.

[0011] Optionally, the sealing unit includes a first sealing pad, which seals the communication port; the pressing unit includes a pressing plate and N blocks, where N>1; the pressing plate abuts against the first sealing pad, and the N blocks are clamped with the fixing plate and respectively press the pressing plate.

[0012] Optionally, the pressing plate is provided with a first limiting portion protruding therefrom; a first notch adapted to be engaged with the first limiting portion is formed in the inner wall of the sealing groove, and the first notch is adapted to limit the circumferential rotation of the pressing plate.

[0013] Optionally, the clamping block includes a first main body portion, a first clamping portion and a second clamping portion protruding relative to the first main body portion. The first main body portion presses against the pressing plate; a second notch adapted to be engaged with the first clamping portion is formed in the inner wall of the sealing groove, which is adapted to limit the circumferential rotation of the clamping block; a first stopping groove adapted to be engaged with the second clamping portion is formed in the inner wall of the sealing groove, and the first stopping groove is disposed between the first notch and the second notch, which is adapted to limit the axial movement of the clamping block.

[0014] Optionally, the sealing unit includes a second sealing gasket, and the second sealing gasket covers and seals the communication port; the pressing unit includes a pressing plate and N clamping blocks, where N>1;

[0015] An axial end of the clamping block abuts against the second sealing gasket; the clamping block is engaged with the fixing plate in the radial direction;

[0016] The pressing plate is connected to the fixing plate and presses against a side of the N clamping blocks away from the second sealing gasket, and the pressing plate is adapted to limit the radial movement of the N clamping blocks.

[0017] Optionally, the clamping block includes a second main body portion, a third clamping portion and a fourth clamping portion respectively connected to the second main body portion. The pressing plate presses against the second main body portion; a second stopping groove corresponding to the third clamping portion is formed in the peripheral wall of the sealing groove, which is adapted to limit the axial movement of the third clamping portion. The fourth clamping portion protrudes toward the second sealing gasket, and a boss corresponding to the fourth clamping portion is provided on the second sealing gasket, which is adapted to limit the radial movement of the fourth clamping portion.

[0018] Optionally, a second limiting portion is protruding from a side of the pressing plate close to the clamping block, and the second limiting portion is disposed between any two adjacent sets of clamping blocks, and the second limiting portion is adapted to limit the radial movement of the clamping blocks.

[0019] Optionally, the sealing unit includes a third sealing gasket, and the third sealing gasket covers and seals the communication port;

[0020] The pressing unit includes a cover plate and a bolt. The cover plate abuts against the third sealing gasket, and the bolt passes through the cover plate and is connected to the fixing plate.

[0021] Optionally, a first protrusion is provided on the wall surface of the third gasket close to the communication port; a first groove corresponding to the first protrusion is provided on the bottom wall of the sealing groove; the first protrusion is in pressing contact with the first groove;

[0022] A second protrusion is provided on the wall surface of the third gasket close to the cover plate; a second groove corresponding to the second protrusion is provided on the bottom wall of the cover plate; the second protrusion is in pressing contact with the second groove.

[0023] The single cell provided by the present invention includes: a single cell body, and the sealing structure as described above.

[0024] The technical solution of the present invention has the following advantages:

[0025] 1. The sealing structure provided by the present invention includes: a fixing plate, provided with a sealing groove, and a communication port is provided on the bottom wall of the sealing groove; a sealing unit, disposed in the sealing groove to cover the communication port; a pressing unit, disposed in the sealing groove to press the sealing unit; the pressing unit is detachably and fixedly connected to the fixing plate; by the assembly and disassembly of the pressing unit and the sealing groove, the pressing force of the sealing unit is adjusted, and thus the switching between the first state and the second state of the communication port is realized, and the multiple filling of the heat-conducting medium is realized, which is beneficial to extending the service life of the battery cell.

[0026] 2. In the sealing structure provided by the present invention, by providing a first limiting portion on the outer peripheral wall of the pressing plate, the first limiting portion is engaged with the first notch of the sealing groove, so as to limit the circumferential rotation of the pressing plate; by the first main body portion pressing the pressing plate, the axial movement of the pressing plate is limited; by the first engaging portion being engaged with the second notch, the circumferential rotation of the block is limited; by the second engaging portion being engaged with the first stopping groove, the axial movement of the block is limited, and thus the detachable and fixed connection of the pressing plate and the block to the fixing plate is realized, which is convenient for the multiple filling of the heat-conducting medium and is beneficial to extending the service life of the battery cell.

[0027] 3. In the sealing structure provided by the present invention, the block is engaged with the second stopping groove through the third engaging portion, so as to limit the axial movement of the third engaging portion; the block is engaged with the boss of the second gasket through the fourth engaging portion, so as to limit the radial movement of the fourth engaging portion; by providing the second limiting portion between any two adjacent groups of the blocks on the pressing plate, and the second limiting portion is in interference fit with any two adjacent groups of the blocks, the radial movement of the blocks is limited, and thus the detachable and fixed connection of the pressing plate and the block to the fixing plate is realized, which is convenient for the multiple filling of the heat-conducting medium and is beneficial to extending the service life of the battery cell.

[0028] 4. The sealing structure provided by the present invention has a first protrusion protruding from the wall surface of the third sealing gasket close to the communication port; a first groove corresponding to the first protrusion is formed on the inner bottom wall of the sealing groove; the first protrusion and the first groove are in pressing contact with each other, thereby enhancing the sealing performance of the third sealing gasket to the communication port; a second protrusion protrudes from the wall surface of the third sealing gasket close to the cover plate; a second groove corresponding to the second protrusion is formed on the bottom wall of the cover plate; the second protrusion and the second groove are in pressing contact with each other. During the encapsulation process, the second protrusion can first be in pressing contact with the second groove, and then the whole is axially pressed into the sealing groove, so that the first protrusion and the first groove are in pressing contact with each other, which is beneficial to reducing the encapsulation difficulty. Description of the Drawings

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 Exploded structural schematic diagram of the sealing structure in Embodiment 1 of the present invention;

[0031] Figure 2 Cross-sectional structural schematic diagram of the sealing structure in Embodiment 1 of the present invention;

[0032] Figure 3 Overall structural schematic diagram of the sealing structure in Embodiment 1 of the present invention;

[0033] Figure 4 Overall structural schematic diagram of the pressing plate of the sealing structure in Embodiment 2 of the present invention;

[0034] Figure 5 Overall structural schematic diagram of the clamping block of the sealing structure in Embodiment 2 of the present invention;

[0035] Figure 6 Overall structural schematic diagram of the second sealing gasket of the sealing structure in Embodiment 2 of the present invention;

[0036] Figure 7 Exploded structural schematic diagram of the sealing structure in Embodiment 2 of the present invention;

[0037] Figure 8 Cross-sectional structural schematic diagram of the sealing structure in Embodiment 2 of the present invention after hiding the second sealing gasket;

[0038] Figure 9 Cross-sectional structural schematic diagram of the sealing structure in Embodiment 2 of the present invention;

[0039] Figure 10 Explosion structure schematic diagram of the sealing structure in the third embodiment of the present invention;

[0040] Figure 11 Cross-sectional structure schematic diagram of the third sealing gasket of the sealing structure in the third embodiment of the present invention;

[0041] Figure 12 Cross-sectional structure schematic diagram of the sealing structure after hiding the third sealing gasket in the third embodiment of the present invention;

[0042] Figure 13 Cross-sectional structure schematic diagram of the sealing structure in the third embodiment of the present invention;

[0043] Figure 14 Structure schematic diagram of the single cell of the present invention.

[0044] Explanation of reference numerals:

[0045] 11. Housing; 12. Cover body;

[0046] 2. Fixed plate; 20. Sealing groove; 200. Communication port; 211. First notch; 212. Second notch; 221. First stop groove; 222. Second stop groove; 231. First groove;

[0047] 31. First sealing gasket; 32. Second sealing gasket; 321. Boss; 33. Third sealing gasket; 331. First protrusion; 332. Second protrusion; 34. Sealing ring;

[0048] 41. Press plate; 411. First limiting portion; 412. Second limiting portion;

[0049] 42. Block; 4201. First main body portion; 4202. Second main body portion; 421. First clamping portion; 422. Second clamping portion; 423. Third clamping portion; 424. Fourth clamping portion;

[0050] 51. Cover plate; 511. Second groove; 52. Bolt;

[0051] 6. Bare battery cell. Detailed implementation manners

[0052] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0056] Embodiment 1

[0057] Combined Figures 1 - 14 As shown, the sealing structure provided in this embodiment includes:

[0058] A fixing plate 2 is provided with a sealing groove 20, and a communication port 200 is opened on the bottom wall of the sealing groove 20;

[0059] A sealing unit is arranged in the sealing groove 20 to cover and seal the communication port 200;

[0060] A pressing unit is arranged in the sealing groove 20 to press the sealing unit; the pressing unit is detachably and fixedly connected to the fixing plate 2.

[0061] It should be noted that the axial direction refers to Figure 2The direction indicated by the central axis "L" therein; the radial direction refers to the direction perpendicular to the central axis L; the circumferential direction refers to the rotational direction around the central axis L; the fixing plate 2 is a part of the housing 11 or the cover 12, and the housing 11 and the cover 12 enclose to form a receiving cavity, and the receiving cavity is adapted to receive a heat-conducting medium and / or an electrolyte; the sealing groove 20 is opened on the outer wall of at least one of the housing 11 and the cover 12, that is, the sealing groove 20 can be opened on the outer wall of any one of the housing 11 and the cover 12, and the sealing groove 20 can also be opened on the outer walls of both the housing 11 and the cover 12 at the same time, which can be adjusted according to the actual production situation, not limited to the situation described in this embodiment; the number of the sealing grooves 20 is at least one group, and can be two groups or more than two groups. One group can be used to inject the heat-conducting medium, and the other group can be used to inject the electrolyte, which can be adjusted according to the actual production situation, not limited to the situation described in this embodiment.

[0062] Optionally, the sealing groove 20 is opened on the outer wall of the cover 12; a communication port 200 is opened on the inner bottom wall of the sealing groove 20, and the communication port 200 is adapted to communicate the receiving cavity with the outside of the cover 12.

[0063] Optionally, the communication port 200 has a completely closed first state and a second state in which the receiving cavity is at least partially communicated with the outside; after the heat-conducting medium and / or the electrolyte are injected into the receiving cavity, the communication port 200 is switched to the first state; during the injection of the heat-conducting medium and / or the electrolyte into the receiving cavity, the communication port 200 is switched to the second state.

[0064] Optionally, the sealing unit 3 is detachably arranged at the communication port 200. After the heat-conducting medium and / or the electrolyte are injected into the receiving cavity, the sealing unit 3 is pressed against and closes the communication port 200 under the extrusion of the pressing unit 4, so as to maintain the first state of the communication port 200; during the injection of the heat-conducting medium and / or the electrolyte into the receiving cavity, the sealing unit 3 disengages from the communication port 200, so that the communication port 200 is switched to the second state.

[0065] Optionally, the pressing unit 4 is detachably and fixedly connected to the sealing groove 20. After the pressing unit 4 is assembled with the sealing groove 20, one axial end of the pressing unit 4 presses the sealing unit 3 towards the communication port 200, so as to maintain the first state of the communication port 200; when the pressing unit 4 is detached from the sealing groove 20, the sealing unit 3 loses the extrusion force and disengages from the communication port 200, so that the communication port 200 is switched to the second state.

[0066] In this embodiment, the sealing structure includes: a fixing plate 2, which is provided with a sealing groove 20, and a communication port 200 is formed in the bottom wall of the sealing groove 20; a sealing unit, which is arranged in the sealing groove 20 to cover the communication port 200; a pressing unit, which is arranged in the sealing groove 20 to press the sealing unit; the pressing unit is detachably and fixedly connected to the fixing plate 2; by assembling and disassembling the pressing unit 4 and the sealing groove 20, the extrusion force of the sealing unit 3 is adjusted, and then the switching between the first state and the second state of the communication port 200 is realized, and the multiple filling of the heat-conducting medium is realized, which is beneficial to extending the service life of the battery cell.

[0067] Specifically, the sealing unit includes a first sealing gasket 31, and the first sealing gasket 31 covers the communication port 200; the pressing unit includes a pressing plate 41 and N clamping blocks 42, where N > 1; the pressing plate 41 abuts against the first sealing gasket 31, and the N clamping blocks 42 are clamped with the fixing plate 2 and respectively press the pressing plate 41.

[0068] It should be noted that, as shown in Figures 1 - 3 shown, the first sealing gasket 31 covers the communication port 200; the pressing unit includes a pressing plate 41 and N clamping blocks 42, where N > 1; the pressing plate 41 abuts against the first sealing gasket 31, and the N clamping blocks 42 are clamped with the fixing plate 2 and respectively press the pressing plate 41; when the filling of the heat-conducting medium and / or the electrolyte into the accommodating cavity is completed, the first sealing gasket 31 abuts against and closes the communication port 200 under the extrusion of the pressing plate 41, so as to maintain the first state of the communication port 200; during the process of injecting the heat-conducting medium and / or the electrolyte into the accommodating cavity, the pressing plate 41 and the clamping blocks 42 are disengaged from the sealing groove 20, so that the first sealing gasket 31 is disengaged from the communication port 200, and thus the communication port 200 is switched to the second state.

[0069] Specifically, the pressing plate 41 is provided with a first limiting portion 411 protruding therefrom; a first notch 211 engaged with the first limiting portion 411 is formed in the inner wall of the sealing groove 20, and the first notch 211 is adapted to limit the circumferential rotation of the pressing plate 41.

[0070] Optionally, the number of the first limiting portions 411 is at least two groups, the number of the first notches 211 is at least two groups, and the first limiting portions 411 and the first notches 211 are arranged in one-to-one correspondence.

[0071] As shown in Figure 1 shown, a first limiting portion 411 protrudes radially along the outer circumferential wall of the pressing plate 41; a first notch 211 is formed in the inner wall of the sealing groove 20, and the first notch 211 is engaged with the first limiting portion 411 to limit the circumferential rotation of the pressing plate 41.

[0072] Optionally, the number of the clamping blocks 42 is at least two groups; the central angle of any group of the clamping blocks 42 is less than 180°, so as to facilitate the disassembly and assembly between the clamping blocks 42 and the sealing groove 20.

[0073] Specifically, the clamping block 42 includes a first main body portion 4201, a first clamping portion 421 and a second clamping portion 422 which protrude relative to the first main body portion 4201. The first main body portion 4201 presses against the pressing plate 41; a second notch 212 engaged with the first clamping portion 421 is formed in the inner wall of the sealing groove 20, which is adapted to limit the circumferential rotation of the clamping block 42; a first stop groove 221 engaged with the second clamping portion 422 is formed in the inner wall of the sealing groove 20, and the first stop groove 221 is arranged between the first notch 211 and the second notch 212, which is adapted to limit the axial movement of the clamping block 42.

[0074] Combined Figures 1 - 3 As shown, in this embodiment, by providing a first limiting portion 411 on the outer circumferential wall of the pressing plate 41, the first limiting portion 411 is engaged with the first notch 211 of the sealing groove 20, so as to limit the circumferential rotation of the pressing plate 41; by pressing the pressing plate 41 with the first main body portion 4201, the axial movement of the pressing plate 41 is limited; by engaging the first clamping portion 421 with the second notch 212, the circumferential rotation of the clamping block 42 is limited; by engaging the second clamping portion 422 with the first stop groove 221, the axial movement of the clamping block 42 is limited, so as to realize the detachable fixed connection between the pressing plate 41 and the clamping block 42 and the fixing plate 2, which is convenient for multiple filling of the heat-conducting medium and is beneficial to extending the service life of the battery cell.

[0075] Embodiment Two

[0076] It should be noted that, in Embodiment One, the clamping block 42 presses against the pressing plate 41 through the first main body portion 4201, so as to limit the axial movement of the pressing plate 41; different from Embodiment One, in Embodiment Two, the pressing plate 41 limits the radial movement of N clamping blocks 42 through the second limiting portion 412.

[0077] Specifically, the sealing unit includes a second sealing gasket 32, and the second sealing gasket 32 covers the communication port 200; the pressing unit includes a pressing plate 41 and N clamping blocks 42, where N>1;

[0078] One axial end of the clamping block 42 abuts against the second sealing gasket 32; the clamping block 42 is engaged with the fixing plate 2 in the radial direction;

[0079] The pressing plate 41 is connected to the fixed plate 2 and presses against one side of the N clamping blocks 42 away from the second gasket 32, and the pressing plate 41 is adapted to restrict the radial movement of the N clamping blocks 42.

[0080] Optionally, the sealing unit 3 further includes a sealing ring 34, and the sealing ring 34 is disposed between the outer peripheral wall of the pressing plate 41 and the inner peripheral wall of the sealing groove 20.

[0081] Specifically, the clamping block 42 includes a second main body portion 4202, a third clamping portion 423 and a fourth clamping portion 424 which are respectively connected to the second main body portion 4202. The pressing plate 41 presses against the second main body portion 4202; a second stop groove 222 corresponding to the third clamping portion 423 is formed in the peripheral wall of the sealing groove 20 and is adapted to restrict the axial movement of the third clamping portion 423. The fourth clamping portion 424 protrudes toward the second gasket 32, and a boss 321 corresponding to the fourth clamping portion 424 is provided on the second gasket 32 and is adapted to restrict the radial movement of the fourth clamping portion 424.

[0082] Specifically, a second limiting portion 412 protrudes from one side of the pressing plate 41 close to the clamping block 42. The second limiting portion 412 is disposed between any two adjacent groups of the clamping blocks 42, and the second limiting portion 412 is adapted to restrict the radial movement of the clamping block 42.

[0083] Combined Figures 4 - 9 As shown, in this embodiment, the clamping block 42 is clamped with the second stop groove 222 through the third clamping portion 423, so as to restrict the axial movement of the third clamping portion 423; the clamping block 42 is clamped with the boss 321 of the second gasket 32 through the fourth clamping portion 424, so as to restrict the radial movement of the fourth clamping portion 424; the pressing plate 41 restricts the radial movement of the clamping block 42 by providing the second limiting portion 412 between any two adjacent groups of the clamping blocks 42, and the second limiting portion 412 and any two adjacent groups of the clamping blocks 42 are in interference fit, so as to realize the detachable fixed connection between the pressing plate 41 and the clamping block 42 and the fixed plate 2, which is convenient for multiple filling of the heat-conducting medium and is beneficial to extending the service life of the electric core.

[0084] Embodiment Three

[0085] Different from Embodiment One and Embodiment Two, the pressing unit includes a cover plate 51 and a bolt 52, and the bolt 52 passes through the cover plate 51 and is connected to the fixed plate 2.

[0086] Specifically, the sealing unit includes a third gasket 33, and the third gasket 33 covers and seals the communication port 200;

[0087] The pressing unit includes a cover plate 51 and a bolt 52. The cover plate 51 abuts against the third gasket 33, and the bolt 52 passes through the cover plate 51 and is connected to the fixing plate 2.

[0088] Specifically, a first protrusion 331 is convexly provided on the wall surface of the third gasket 33 close to the communication port 200; a first groove 231 corresponding to the first protrusion 331 is formed on the inner bottom wall of the sealing groove 20; the first protrusion 331 and the first groove 231 are in extrusion contact;

[0089] A second protrusion 332 is convexly provided on the wall surface of the third gasket 33 close to the cover plate 51; a second groove 511 corresponding to the second protrusion 332 is formed on the bottom wall of the cover plate 51; the second protrusion 332 and the second groove 511 are in extrusion contact.

[0090] Combined Figures 11 - 13 As shown, in this embodiment, a first protrusion 331 is convexly provided on the wall surface of the third gasket 33 close to the communication port 200; a first groove 231 corresponding to the first protrusion 331 is formed on the inner bottom wall of the sealing groove 20; the first protrusion 331 and the first groove 231 are in extrusion contact, thereby enhancing the sealing performance of the third gasket 33 to the communication port 200; a second protrusion 332 is convexly provided on the wall surface of the third gasket 33 close to the cover plate 51; a second groove 511 corresponding to the second protrusion 332 is formed on the bottom wall of the cover plate 51; the second protrusion 332 and the second groove 511 are in extrusion contact. During the encapsulation process, the second protrusion 332 can first be in extrusion contact with the second groove 511, and then the whole is axially pressed into the sealing groove 20, so that the first protrusion 331 and the first groove 231 are in extrusion contact, which is beneficial to reducing the encapsulation difficulty.

[0091] Embodiment 4

[0092] This embodiment provides a single cell, including: a single cell body, and the sealing structure as described above.

[0093] Optionally, the single cell includes a housing 11 and a cover 12 covering the open end of the housing 11; an accommodation cavity is formed by surrounding the inner walls of the housing 11 and the cover 12, and is adapted to accommodate a bare electric core 6, a heat-conducting medium and / or an electrolyte; the heat-conducting medium is disposed between the bare electric core 6 and the inner wall of the housing 11, and is adapted to conduct the heat generated by the bare electric core 6 to the housing 11; the phase state of the heat-conducting medium includes but is not limited to gaseous, liquid and / or gas-liquid mixed state; the sealing structure is disposed on the outer wall of the cover 12; by providing the sealing structure, the closing and opening of the accommodation cavity are realized, and further the multiple filling of the heat-conducting medium is realized, which is beneficial to extending the service life of the power battery cell.

[0094] Obviously, the above embodiments are merely examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to exhaustively list all implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A sealing structure is applied to the outer wall of the cover of a single battery, and is characterized in that, Comprising: A fixed plate (2) is provided with a sealing groove (20), and a communication port (200) is provided on the bottom wall of the sealing groove (20); A sealing unit is arranged in the sealing groove (20) to seal the communication port (200); A pressing unit is arranged in the sealing groove (20) to press the sealing unit; the pressing unit is detachably and fixedly connected to the fixed plate (2); The sealing unit includes a first sealing gasket (31), and the first sealing gasket (31) seals the communication port (200); the pressing unit includes a pressing plate (41) and N clamping blocks (42), where N > 1; the pressing plate (41) abuts against the first sealing gasket (31), and the N clamping blocks (42) are clamped with the fixed plate (2) and respectively press the pressing plate (41); The pressing plate (41) is convexly provided with a first limiting portion (411); a first notch (211) that is clamped with the first limiting portion (411) is provided on the inner wall of the sealing groove (20), and the first notch (211) is adapted to limit the circumferential rotation of the pressing plate (41); The clamping block (42) includes a first main body portion (4201) and a first clamping portion (421) and a second clamping portion (422) that protrude relative to the first main body portion (4201), and the first main body portion (4201) presses the pressing plate (41); a second notch (212) that is clamped with the first clamping portion (421) is provided on the inner wall of the sealing groove (20), which is adapted to limit the circumferential rotation of the clamping block (42); a first stop groove (221) that is clamped with the second clamping portion (422) is provided on the inner wall of the sealing groove (20), and the first stop groove (221) is arranged between the first notch (211) and the second notch (212), which is adapted to limit the axial movement of the clamping block (42).

2. A sealing structure is applied to the outer wall of the cover of a single cell, characterized in that Comprising: A fixed plate (2) is provided with a sealing groove (20), and a communication port (200) is provided on the bottom wall of the sealing groove (20); A sealing unit is arranged in the sealing groove (20) to seal the communication port (200); A pressing unit is arranged in the sealing groove (20) to press the sealing unit; the pressing unit is detachably and fixedly connected to the fixed plate (2); The sealing unit includes a second sealing gasket (32), and the second sealing gasket (32) seals the communication port (200); the pressing unit includes a pressing plate (41) and N clamping blocks (42), where N > 1; An axial end of the clamping block (42) abuts against the second sealing gasket (32); the clamping block (42) is clamped with the fixed plate (2) in the radial direction; The pressing plate (41) is connected to the fixed plate (2) and presses against a side of the N clamping blocks (42) away from the second sealing gasket (32), and the pressing plate (41) is adapted to limit the radial movement of the N clamping blocks (42); The clamping block (42) includes a second main body portion (4202), a third clamping portion (423) and a fourth clamping portion (424) respectively connected to the second main body portion (4202), and the pressing plate (41) presses against the second main body portion (4202); a second stop groove (222) corresponding to the third clamping portion (423) is formed in the peripheral wall of the sealing groove (20), which is adapted to limit the axial movement of the third clamping portion (423), the fourth clamping portion (424) protrudes towards the second sealing gasket (32), and a boss (321) corresponding to the fourth clamping portion (424) is arranged on the second sealing gasket (32), which is adapted to limit the radial movement of the fourth clamping portion (424); A second limiting portion (412) protrudes from a side of the pressing plate (41) close to the clamping block (42), the second limiting portion (412) is arranged between any two adjacent groups of the clamping blocks (42), and the second limiting portion (412) is adapted to limit the radial movement of the clamping block (42).

3. A single cell, characterized in that, Comprising: A single cell body and the sealing structure as described in claim 1 or claim 2 above.

Images