Battery cell cover assembly and battery cell housing, battery cell, electric device

Abstract

The application discloses a battery cell cover assembly, a battery cell shell, a battery cell, an electric device, and an electrode assembly of a battery cell. The electrode assembly of the battery cell has a tab. The battery cell cover assembly comprises a cover part, a cover cap, a first insulating piece, and a second insulating piece. The cover part is provided with a relief through hole, and the tab is arranged in the relief through hole. The cover cap is used for covering the relief through hole. The first insulating piece is arranged on the side of the cover part away from the cover cap. The second insulating piece is arranged between the cover cap and the tab. The second insulating piece is fixedly connected with the cover cap and / or the first insulating piece. According to the battery cell cover assembly, the second insulating piece is arranged between the tab and the cover cap to separate the tab and the cover cap, thereby reducing the possibility of contact between the tab and the cover cap. Meanwhile, the position of the second insulating piece is fixed to limit the second insulating piece between the tab and the cover cap, thereby reducing the possibility of electric leakage or short circuit of the battery cell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a cover assembly of battery monomer, a shell of battery monomer, a battery monomer and an electric device. BACKGROUND

[0002] The power battery is a power source for providing power for tools, and is usually a storage battery for providing power for electric vehicles, electric trains, electric bicycles and golf carts. The power battery is a core component of new energy vehicles. New energy vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environment-friendly advantages. For new energy vehicles, battery technology is an important factor for their development.

[0003] In the related art, the cover of the battery shell is provided with a avoiding through hole, the tab is arranged in the avoiding through hole, and the cap is arranged in the avoiding through hole to close the avoiding through hole. However, there is a risk that the tab will contact the cap, which can easily cause the battery to leak electricity. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a cover assembly of a battery monomer, which is arranged between the tab and the cap to separate the tab and the cap, thereby reducing the possibility of contact between the tab and the cap. At the same time, the position of the second insulating piece is fixed to limit the second insulating piece between the tab and the cap, so as to ensure that the second insulating piece can stably separate the tab and the cap, thereby reducing the possibility of battery monomer leakage or short circuit.

[0005] The present application also provides a shell with the battery monomer.

[0006] The present application also provides a battery monomer with the cover assembly of the battery monomer.

[0007] The present application also provides an electric device with the battery monomer.

[0008] According to the cover assembly of the battery monomer of the first aspect of the present application, the cover assembly of the battery monomer comprises: a cover part, the cover part is provided with an avoiding through hole, the tab is arranged in the avoiding through hole; a cap, the cap is used to cover the avoiding through hole; a first insulating piece, the first insulating piece is arranged on the side of the cover part away from the cap; a second insulating piece, the second insulating piece is arranged between the cap and the tab, wherein the second insulating piece is fixedly connected with the cap and / or the first insulating piece.

[0009] According to an embodiment of the present invention, a second insulating member is provided between the tab and the cap to separate the tab and the cap, thereby reducing the possibility of contact between the tab and the cap. At the same time, by fixing the position of the second insulating member, the second insulating member is confined between the tab and the cap, ensuring that the second insulating member can stably separate the tab and the cap, thereby reducing the possibility of leakage or short circuit in the battery cell.

[0010] In addition, the cover assembly of the battery cell according to the above embodiments of the present invention may also have the following additional technical features:

[0011] According to some embodiments of the present invention, the first insulating member has a protrusion that protrudes toward the cover portion, the protrusion passing through the clearance through hole and located between the clearance through hole and the electrode tab.

[0012] According to some optional embodiments of the present invention, the second insulating member is fixedly connected to the first insulating member, and the second insulating member is sleeved on the protrusion and fixedly engaged with the protrusion.

[0013] According to some specific embodiments of the present invention, the second insulating member and the protrusion are engaged in a snap-fit ​​configuration.

[0014] In some embodiments, one of the second insulating member and the protrusion is provided with a hook, and the other is provided with a groove that engages with the hook.

[0015] According to some alternative embodiments of the present invention, the cap and the second insulating element are fixedly connected.

[0016] According to some alternative embodiments of the present invention, one of the second insulating member and the cap is provided with a groove, and the other is provided with a protrusion that mates with the groove.

[0017] According to some specific embodiments of the present invention, the cap defines a first inner cavity, and the second insulating member is located in the first inner cavity and defines a second inner cavity, wherein one of the groove and the protrusion is provided on the inner top wall of the cap, and the other of the groove and the protrusion is provided on the outer top wall of the second insulating member; or, one of the groove and the protrusion is provided on the inner side wall of the cap, and the other of the groove and the protrusion is provided on the outer side wall of the second insulating member.

[0018] According to some embodiments of the present invention, an adhesive portion is provided between the second insulating member and the cap.

[0019] According to some alternative embodiments of the present invention, the cap defines a first inner cavity, the second insulating member is located in the first inner cavity and defines a second inner cavity, wherein the adhesive portion is located between the inner top wall of the cap and the outer top wall of the second insulating member; and / or, the adhesive portion is located between the inner side wall of the cap and the outer side wall of the second insulating member.

[0020] According to some optional embodiments of the present invention, the side of the cover portion opposite to the first insulating member is provided with an annular groove, the annular groove is arranged around the clearance through hole, and the cap is sealed with the bottom wall of the annular groove.

[0021] According to a second aspect of the present invention, a housing for a battery cell is provided, the housing comprising: a shell portion having a mounting opening at one end; and a cover assembly for the battery cell according to a first aspect of the present invention, the cover assembly being disposed at the mounting opening.

[0022] According to an embodiment of the present invention, a second insulating member is provided between the tab and the cap in the housing of a battery cell to separate the tab and the cap, thereby reducing the possibility of contact between the tab and the cap. At the same time, by fixing the position of the second insulating member, the second insulating member is confined between the tab and the cap, ensuring that the second insulating member can stably separate the tab and the cap, thereby reducing the possibility of leakage or short circuit in the battery cell.

[0023] According to some embodiments of the present invention, both ends of the shell are provided with the cover assembly, one of the cover assemblies is provided with an explosion-proof valve, and the other cover assembly is provided with an injection hole.

[0024] According to a third aspect of the present invention, a battery cell is provided, the battery cell comprising the housing of the battery cell described in the second aspect of the present invention.

[0025] According to an embodiment of the present invention, a second insulating member is provided between the tab and the cap in the battery cell to separate the tab and the cap, thereby reducing the possibility of contact between the tab and the cap. At the same time, by fixing the position of the second insulating member, the second insulating member is confined between the tab and the cap, ensuring that the second insulating member can stably separate the tab and the cap, thereby reducing the possibility of leakage or short circuit in the battery cell.

[0026] According to a fourth aspect of the present invention, an electrical device is provided, the electrical device comprising a battery cell as described in an embodiment of a third aspect of the present invention.

[0027] According to an embodiment of the present invention, an electrical device utilizes a battery cell as described in the third aspect of the present invention to provide a second insulating member between the tab and the cap to separate the tab and the cap, thereby reducing the possibility of contact between the tab and the cap. At the same time, by fixing the position of the second insulating member to confine the second insulating member between the tab and the cap, it is ensured that the second insulating member can stably separate the tab and the cap, thereby reducing the possibility of leakage or short circuit of the battery cell and improving the safety of the electrical device.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0030] Figure 1 This is a schematic diagram of the structure of the cover assembly according to an embodiment of the present invention;

[0031] Figure 2 This is an exploded view of the cover assembly according to an embodiment of the present invention;

[0032] Figure 3 This is a front view of the cover assembly according to an embodiment of the present invention;

[0033] Figure 4 This is a cross-sectional view of the cover assembly according to an embodiment of the present invention;

[0034] Figure 5 This is a partial structural schematic diagram of the cover assembly according to an embodiment of the present invention;

[0035] Figure 6 yes Figure 5 A magnified view of a specific part of the image;

[0036] Figure 7 This is a partial structural schematic diagram of the cover assembly according to an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the first insulating member according to an embodiment of the present invention;

[0038] Figure 9 This is a front view of the first insulating member according to an embodiment of the present invention;

[0039] Figure 10 yes Figure 9 Enlarged view of point A in the middle;

[0040] Figure 11 This is a schematic diagram of the structure of the second insulating member according to an embodiment of the present invention;

[0041] Figure 12 This is a structural cross-sectional view of the cap and the second insulating member according to an embodiment of the present invention;

[0042] Figure 13 This is a schematic diagram of the structure of the second insulating member according to some embodiments of the present invention;

[0043] Figure 14 This is a schematic diagram of the structure of a cap according to some embodiments of the present invention;

[0044] Figure 15 This is a schematic diagram of the structure of the second insulating member according to some embodiments of the present invention;

[0045] Figure 16 This is a schematic diagram of the structure of a cap according to some embodiments of the present invention;

[0046] Figure 17 This is a schematic diagram of the structure of the cover portion according to an embodiment of the present invention;

[0047] Figure 18 This is a schematic diagram of the structure of a battery cell according to an embodiment of the present invention;

[0048] Figure 19 This is a partial cross-sectional view of a battery cell according to an embodiment of the present invention;

[0049] Figure 20 This is an exploded view of a battery cell according to an embodiment of the present invention;

[0050] Figure 21 This is an exploded view of a battery cell according to an embodiment of the present invention.

[0051] Reference numerals: Battery cell 1000, Cover assembly 1,

[0052] Cover body 10, clearance through hole 11, first mounting hole 12, annular groove 13

[0053] First insulating component 30, protrusion 31, hook 311, guide surface 312, stop surface 313, connecting arm 314, third mounting hole 32.

[0054] Cap 41, flange 411, second insulating component 42, second inner cavity 421, slot 422, groove 431, protrusion 432, pole post 51, explosion-proof valve 52, injection hole 53.

[0055] Shell 60, electrode assembly 70, electrode tab 71. Detailed Implementation

[0056] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0057] The cover assembly 1 of the battery cell according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0058] like Figures 1-6 As shown, the cover assembly 1 of the battery cell according to an embodiment of the present invention includes a cover portion 10, a cap 41, a first insulating member 30, and a second insulating member 42.

[0059] The electrode assembly 70 of the battery cell 1000 has a tab 71, and the cover portion 10 is provided with a clearance through hole 11, through which the tab 71 passes.

[0060] In this method, the tab 71 is directly inserted through the clearance hole 11 to reserve space for the tab 71. This method eliminates the need to bend the tab 71, which reduces the space occupied by the tab 71 inside the cover 10. This allows for more space to be reserved for the electrode assembly 70 inside the battery cell 1000, thereby increasing the energy density and capacity of the battery cell 1000.

[0061] The cap 41 is used to cover the through hole 11 to protect the components located inside the cover body 10. For example, by using the cap 41 to cover the through hole 11, the tab 71 can be prevented from being exposed, providing a relatively stable working environment for the tab 71 and facilitating the protection of the tab 71.

[0062] The first insulating member 30 is provided on the side of the cover portion 10 facing away from the cap 41 to separate the cover portion 10 from the live parts inside the cover portion 10, such as separating the cover portion 10 from the electrode assembly 70, reducing the possibility of contact between the cover portion 10 and the electrode assembly 70, and reducing the possibility of leakage or short circuit of the battery cell 1000.

[0063] The second insulating element 42 is disposed between the cap 41 and the tab 71 to separate the cap 41 and the tab 71, so as to prevent the tab 71 from directly contacting the cap 41 and to prevent leakage or short circuit of the battery cell 1000.

[0064] The second insulating member 42 is fixedly connected to the cap 41 and / or the first insulating member 30, so as to limit the position of the second insulating member 42 by the first insulating member 30 or the cap 41, thereby placing the second insulating member 42 between the cap 41 and the tab 71, preventing the second insulating member 42 from falling off, and ensuring that the second insulating member 42 can stably separate the cap 41 and the tab 71, thereby reducing the possibility of leakage or short circuit of the battery cell.

[0065] It should be explained here that the inner side refers to the inner side of the cover assembly 1 when it is disposed on the shell portion 60 of the battery cell 1000, that is, the side of the cover portion 10 facing the electrode assembly 70 is the inner side, and the side of the cover portion 10 facing away from the electrode assembly 70 is the outer side.

[0066] According to an embodiment of the present invention, a second insulating member 42 is provided between the tab 71 and the cap 41 to separate the tab 71 and the cap 41, thereby reducing the possibility of contact between the tab 71 and the cap 41. At the same time, by fixing the position of the second insulating member 42, the second insulating member 42 is confined between the tab 71 and the cap 41, ensuring that the second insulating member 42 can stably separate the tab 71 and the cap 41, thereby reducing the possibility of leakage or short circuit of the battery cell 1000.

[0067] The cover assembly 1 of a battery cell according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0068] In some specific embodiments of the present invention, such as Figures 1-6 As shown, the cover assembly 1 includes a cover portion 10, a cap 41, a first insulating member 30, and a second insulating member 42.

[0069] In some embodiments of the present invention, such as Figure 2 As shown, the first insulating member 30 and the cap 41 are located on both sides of the second insulating member 42, so that at least one of the first insulating member 30 and the cap 41 can define the position of the second insulating member 42, so that the second insulating member 42 can always separate the cap 41 and the tab 71, avoid the tab 71 from directly contacting the cap 41, and avoid leakage or short circuit of the battery cell 1000.

[0070] In some embodiments, the second insulating member 42 is fixedly connected to the cap 41.

[0071] In some examples, the cap 41 is welded to the cover portion 10, and / or the cap 41 is fixedly connected to the first insulating member 30, and / or the second insulating member 42 is fixedly connected to the first insulating member 30.

[0072] In other embodiments, the second insulating member 42 is fixedly connected to the first insulating member 30.

[0073] In some examples, the cap 41 is welded to the cover portion 10, and / or the cap 41 is fixedly connected to the first insulating member 30, and / or the cap 41 is fixedly connected to the second insulating member 42.

[0074] In some embodiments of the present invention, such as Figure 2 As shown, the first insulating member 30 is provided with a protrusion 31 that protrudes toward the cover portion 10. The protrusion 31 passes through the clearance through hole 11 and is located between the clearance through hole 11 and the tab 71, so as to prevent the tab 71 from directly contacting the edge of the clearance through hole 11, thereby preventing the current on the tab 71 from flowing to the cover portion 10 and reducing the possibility of leakage or short circuit of the battery cell 1000.

[0075] In some embodiments, the protrusion 31 is an annular protrusion that extends circumferentially along the avoidance through hole 11 to sufficiently separate the edge of the avoidance through hole 11 from the portion of the tab 71 that extends into the avoidance through hole 11, thereby reducing the possibility of leakage or short circuit in the battery cell 1000.

[0076] In some alternative embodiments of the present invention, such as Figures 4-6 As shown, the second insulating member 42 is fixedly connected to the first insulating member 30. The second insulating member 42 covers the protrusion 31 to separate the cap 41 and the tab 71 by using the second insulating member 42 and the protrusion 31, so as to prevent the tab 71 from contacting the cap 41 and to prevent leakage or short circuit of the battery cell 1000.

[0077] The second insulating member 42 is fixedly engaged with the protrusion 31, so that the position of the second insulating member 42 is limited by the first insulating member 30, so that the second insulating member 42 can always separate the cap 41 and the tab 71, avoiding direct contact between the tab 71 and the cap 41, thereby reducing the possibility of leakage or short circuit of the battery cell 1000.

[0078] The protrusion 31 extends from the clearance through hole 11 to the outside of the cover portion 10, while the second insulating member 42 is located on the outside of the cover portion 10. This facilitates the installation and cooperation of the second insulating member 42 and the protrusion 31, and reduces the difficulty of operation.

[0079] In some embodiments, such as Figure 4As shown, the cap 41 defines a first inner cavity, and the second insulating member 42 is located in the first inner cavity. The second insulating member 42 defines a second inner cavity 421. The second insulating member 42 covers the protrusion 31, that is, the protrusion 31 is located in the second inner cavity 421. The cap 41 and the second insulating member 42 can protect the protrusion 31 that extends into the avoidance through hole 11. At the same time, the protrusion 31 and the second insulating member 42 together separate the tab 71 from the side wall of the first inner cavity, reducing the possibility of the tab 71 contacting the cap 41, thereby reducing the possibility of leakage or short circuit of the battery cell 1000.

[0080] In some specific embodiments of the present invention, such as Figure 5 , Figure 6 As shown, the second insulating member 42 and the protrusion 31 are engaged in a snap-fit ​​manner. This installation method is simple, convenient, and easy to operate, so as to quickly and accurately achieve the fixed engagement of the second insulating member 42 and the protrusion 31.

[0081] The protrusion 31 extends from the clearance through hole 11 to the outside of the cover portion 10, while the second insulating member 42 is located on the outside of the cover portion 10. This facilitates the installation and cooperation of the second insulating member 42 and the first insulating member, and reduces the difficulty of operation.

[0082] Furthermore, by engaging the second insulating member 42 and the protrusion 31, a detachable engagement between the second insulating member 42 and the protrusion 31 can be achieved, thereby facilitating the subsequent disassembly of the second insulating member 42 and the protrusion 31 to replace or repair the components of the cover assembly 1.

[0083] In some embodiments, one of the second insulating member 42 and the protrusion 31 is provided with a hook 311 and the other is provided with a groove 422. The groove 422 cooperates with the hook 311, thereby enabling the second insulating member 42 and the protrusion 31 to engage.

[0084] The design of the hook 311 and the slot 422 secures the second insulating member 42 and the protrusion 31 together, defining the position of the second insulating member 42 and achieving insulation between the cap 41 and the tab 71. The hook 311 and the slot 422 have a simple structure, low manufacturing cost, and avoid the problem of detachment due to prolonged immersion in electrolyte, thus improving the firmness of the fixation of the second insulating member 42.

[0085] In some examples, such as Figures 7-11 As shown, hooks 311 are provided on both sides of the protrusion 31 along its length, and slots 422 are provided on both sides of the second insulating member 42 along its length. The two hooks 311 and the two slots 422 are engaged in a corresponding snap-fit ​​manner to securely connect the protrusion 31 and the second insulating member 42 together.

[0086] In some examples, such as Figure 4 , Figure 6 and Figure 10 As shown, the second insulating member 42 defines a second inner cavity 421. The second inner cavity 421 has slots 422 extending through its thickness direction on two opposite side walls of the second insulating member 42 in the length direction. The protrusion 31 has two hooks 311, which correspond to and cooperate with the two slots 422. The protrusion 31 is connected to the hooks 311 through a connecting arm 314. The hooks 311 include a guide surface 312 and a stop surface 313. The guide surface 312 is located on the side of the hook 311 facing the slots 422. The two guide surfaces 312 extend from the inside out toward each other, and the stop surface 313 extends in the horizontal direction.

[0087] When the second insulating member 42 is fixed to the protrusion 31, the second insulating member 42 first engages with the guide surface 312. Due to the force exerted by the side wall of the second inner cavity 421 on the two hooks 311, under the guidance of the guide surface 312, the two connecting arms 314 and the hooks 311 will move closer to each other, so that the second insulating member 42 can move smoothly towards the cover part 10. When it moves to the corresponding position, when the hooks 311 are opposite to the slots 422, the two connecting arms 314 restore their deformation and move away from each other. At this time, the two hooks 311 are driven to move away from each other and extend into the corresponding slots 422. The stop surface 313 and the bottom wall of the slot 422 stop and engage, so as to realize the snap-fit ​​engagement of the hooks 311 and the slots 422.

[0088] Furthermore, the protrusion 31, the hook 311, and the connecting arm 314 are integrally formed, which makes it easier to reduce the connection structure and reduce the complexity of the structure.

[0089] In other examples, slots 422 are provided on both sides of the protrusion 31 along its length, and hooks 311 are provided on both sides of the second insulating member 42 along its length. The two hooks 311 and the two slots 422 are engaged in a corresponding snap-fit ​​to securely connect the protrusion 31 and the second insulating member 42 together.

[0090] In some embodiments of the present invention, the cap 41 and the second insulating member 42 are fixedly connected to prevent the cap 41 and the second insulating member 42 from disengaging, thereby enabling the cap 41 to cover the through hole 11 and the second insulating member 42 to separate the cap 41 and the tab 71.

[0091] In some alternative embodiments of the present invention, one of the second insulating member 42 and the cap 41 is provided with a groove 431, and the other is provided with a protrusion 432 that mates with the groove 431. The protrusion 432 extends into the groove 431 to achieve a fixed fit between the second insulating member 42 and the cap 41.

[0092] In some embodiments, the protrusion 432 and the groove 431 are abutted and fixed together, and the size of the protrusion 432 is slightly larger than the size of the groove 431 to achieve an interference fit between the protrusion 432 and the groove 431, so as to fix the second insulating member 42 and the cap 41 together.

[0093] In some embodiments, an adhesive portion may be provided between the protrusion 432 and the groove 431 to further fix the protrusion 432 and the groove 431, thereby achieving a fixed fit between the second insulating member 42 and the cap 41.

[0094] In some specific embodiments of the present invention, such as Figures 12-14 As shown, the cap 41 defines a first inner cavity, and the second insulating member 42 is located in the first inner cavity and defines a second inner cavity 421.

[0095] In some embodiments, one of the groove 431 and the protrusion 432 is provided on the inner top wall of the cap 41, and the other of the groove 431 and the protrusion 432 is provided on the outer top wall of the second insulating member 42. When the cap 41 and the second insulating member 42 are installed together and the second insulating member 42 extends into the first inner cavity, the protrusion 432 extends into the groove 431 to cooperate with the groove 431, thereby fixing the cap 41 and the second insulating member 42 together.

[0096] In some examples, such as Figure 12 As shown, the inner top wall of the cap 41 has a groove 431, and the outer top wall of the second insulating member 42 has a protrusion 432. In other examples, such as Figure 15 , Figure 16 As shown, the inner top wall of the cap 41 is provided with a protrusion 432, and the outer top wall of the second insulating member 42 is provided with a groove 431.

[0097] In some embodiments, one of the groove 431 and the protrusion 432 is provided on the inner sidewall of the cap 41, and the other of the groove 431 and the protrusion 432 is provided on the outer sidewall of the second insulating member 42. When the cap 41 and the second insulating member 42 are installed together and the second insulating member 42 extends into the first inner cavity, the protrusion 432 extends into the groove 431 to cooperate with the groove 431, thereby fixing the cap 41 and the second insulating member 42 together.

[0098] In this case, the cap 41 may have one of the grooves 431 and protrusions 432 on each of its two inner sidewalls, and the second insulating member 42 may have the other of the grooves 431 and protrusions 432 on each of its two outer sidewalls. Alternatively, one of the grooves 431 and protrusions 432 may be provided on one of the inner sidewalls of the cap 41, and the other of the grooves 431 and protrusions 432 may be provided on the corresponding outer sidewall of the second insulating member 42.

[0099] In some examples, the inner wall of the cap 41 has a groove 431, and the outer wall of the second insulator 42 has a protrusion 432. In other examples, the inner wall of the cap 41 has a protrusion 432, and the outer wall of the second insulator 42 has a groove 431.

[0100] In some embodiments, adhesive portions are provided at locations other than the groove 431 and the protrusion 432 in the wall of the first inner cavity and the outer wall of the second insulating member 42, so as to improve the stability of the connection when the second insulating member 42 and the cap 41 are fixedly connected together by the protrusion 432 and the groove 431.

[0101] In some embodiments of the present invention, an adhesive portion is provided between the second insulating member 42 and the cap 41. The adhesive portion can be used to glue the second insulating member 42 and the cap 41 together, thereby achieving a fixed fit between the second insulating member 42 and the cap 41, so that the second insulating member 42 can stably separate the tab 71 and the cap 41.

[0102] In some alternative embodiments of the invention, the cap 41 defines a first inner cavity, and the second insulating member 42 is located in the first inner cavity and defines a second inner cavity 421.

[0103] In some embodiments, the adhesive portion is located between the inner top wall of the cap 41 and the outer top wall of the second insulator 42 to bond and fix the second insulator 42 and the cap 41 together.

[0104] In some embodiments, the adhesive portion is located between the inner sidewall of the cap 41 and the outer sidewall of the second insulator 42 to bond and fix the second insulator 42 and the cap 41 together.

[0105] An adhesive portion may be provided between one inner wall of the cap 41 and one outer wall of the second insulating member 42, or an adhesive portion may be provided between both inner walls of the cap 41 and both outer walls of the second insulating member 42.

[0106] In some embodiments of the present invention, such as Figure 17 As shown, an annular groove 13 is provided on the side of the cover body 10 away from the first insulating member 30. The annular groove 13 is arranged around the avoidance through hole 11. The cap 41 is sealed with the bottom wall of the annular groove 13, which facilitates the concealment of the connection structure between the cap 41 and the cover body 10, such as concealing the weld between the cap 41 and the cover body 10, which facilitates the improvement of appearance.

[0107] In some embodiments, such as Figure 11 , Figure 17As shown, both the cover body 10 and the cap 41 are metal parts. The end of the cap 41 facing the cover body 10 has a flange 411. The flange 411 fits against the bottom wall of the annular groove 13. The flange 411 and the bottom of the annular groove 13 can be welded together to completely seal and avoid the through hole 11.

[0108] In some embodiments of the present invention, the cover assembly 1 further includes an electrical connection piece, which is adapted to be electrically connected to the tab 71. The current at the tab 71 flows to the electrical connection piece and then outputs the current to the outside through the electrical connection piece to realize the power supply of the battery cell 1000.

[0109] The electrical connector is located on the side of the first insulating member 30 facing away from the cover portion 10, so as to separate the cover portion 10 and the electrical connector using the first insulating member 30, to prevent the electrical connector from contacting the cover portion 10, and to prevent the current on the electrical connector from flowing to the cover portion 10, thereby reducing the possibility of leakage of the battery cell 1000.

[0110] In some alternative embodiments of the present invention, such as Figure 2 As shown, the cover portion 10 has a first mounting hole 12, and the electrical connecting piece has a second mounting hole. The cover assembly 1 also includes a terminal post 51, which is respectively installed in the first mounting hole 12 and the second mounting hole to electrically connect with the electrical connecting piece. The current at the tab 71 flows through the electrical connecting piece to the terminal post 51, and outputs current through the terminal post 51 to power the battery cell 1000. An annular third insulating member is provided between the terminal post 51 and the cover portion 10 to separate the terminal post 51 and the cover portion 10, preventing direct contact between the terminal post 51 and the cover portion 10 and preventing leakage of the battery cell 1000.

[0111] In some embodiments, the pole post 51 is welded to the electrical connecting piece to achieve electrical connection. The pole post 51 fixes the electrical connecting piece and the cover portion 10 together, and the third insulating member separates the pole post 51 and the cover portion 10. The first insulating member 30 separates the electrical connecting piece and the cover portion 10. It can be understood that the first insulating member 30 is located between the electrical connecting piece and the cover portion 10. Since the pole post 51 is welded and fixed to the electrical connecting piece, and the first insulating member 30 is sandwiched between the cover portion 10 and the electrical connecting piece, the position of the first insulating member 30 is fixed, so that the cap 41 and / or the second insulating member 42 are fixed to the first insulating member 30, so that the position of the cap 41 and / or the second insulating member 42 can be fixed to prevent the cap 41 and / or the second insulating member 42 from falling off.

[0112] In some examples, such as Figure 8As shown, the first insulating member 30 is provided with a third mounting hole 32. The pole post 51 passes through the first mounting hole 12, the third mounting hole 32 and the second mounting hole in sequence to realize the electrical connection between the pole post 51 and the electrical connecting piece. The pole post 51 is used to fix the cover part 10, the first insulating member 30 and the electrical connecting piece together.

[0113] The following describes the housing of a battery cell according to an embodiment of the present invention. The housing of a battery cell according to an embodiment of the present invention includes a shell portion 60 and a cover assembly 1 of the battery cell according to the above embodiment of the present invention.

[0114] The end of the housing 60 is provided with a mounting port, and the cover assembly 1 is provided at the mounting port so as to cover the mounting port and provide protection for the components of the battery cell 1000 located inside the housing 60.

[0115] In some embodiments, the cover portion 10 is welded to the housing to seal the mounting opening.

[0116] According to an embodiment of the present invention, a second insulating member 42 is provided between the tab 71 and the cap 41 in the housing of the battery cell to separate the tab 71 and the cap 41, thereby reducing the possibility of contact between the tab 71 and the cap 41. At the same time, by fixing the position of the second insulating member 42, the second insulating member 42 is confined between the tab 71 and the cap 41, ensuring that the second insulating member 42 can stably separate the tab 71 and the cap 41, thereby reducing the possibility of leakage or short circuit of the battery cell 1000.

[0117] In some embodiments of the present invention, such as Figures 18-21 As shown, both ends of the housing 60 are provided with cover assemblies 1. One of the cover assemblies 1, on its cover portion 10, is equipped with an explosion-proof valve 52. When the internal pressure of the housing exceeds a preset safety value, the explosion-proof valve 52 will automatically open to release the accumulated gas, thereby reducing the pressure and preventing the battery cell 1000 from rupturing or exploding. The other cover assembly 1, on its cover portion 10, is equipped with an injection hole 53, through which electrolyte can be added into the housing 60, enabling the electrode assembly 70 to react chemically with the electrolyte, allowing the battery cell 1000 to charge or discharge.

[0118] By separately setting the explosion-proof valve 52 and the injection port 53 on two cover assemblies 1, the positions of the explosion-proof valve 52 and the injection port 53 on the housing can be reasonably set, avoiding the components in the housing space from being too crowded or scattered.

[0119] In some examples, the electrode assembly 70 includes a positive electrode tab and a negative electrode tab, and two cover assemblies 1 are a first cover assembly and a second cover assembly, respectively. The cover assembly 1 also includes an electrical connecting piece. The positive electrode tab is electrically connected to the electrical connecting piece in the first cover assembly, and the negative electrode tab is electrically connected to the electrical connecting piece in the second cover assembly. The cover portion 10 in the first cover assembly is provided with a liquid injection hole 53, and the cover portion 10 in the second cover assembly is provided with an explosion-proof valve 52.

[0120] The following describes a battery cell 1000 according to an embodiment of the present invention. The battery cell 1000 according to an embodiment of the present invention includes the casing of the battery cell according to the above embodiment of the present invention.

[0121] According to an embodiment of the present invention, a second insulating member 42 is provided between the tab 71 and the cap 41 in the battery cell 1000 to separate the tab 71 and the cap 41, thereby reducing the possibility of the tab 71 and the cap 41 coming into contact. At the same time, by fixing the position of the second insulating member 42, the second insulating member 42 is confined between the tab 71 and the cap 41, ensuring that the second insulating member 42 can stably separate the tab 71 and the cap 41, thereby reducing the possibility of leakage or short circuit in the battery cell 1000.

[0122] The following describes an electrical appliance according to an embodiment of the present invention. The electrical appliance according to an embodiment of the present invention includes a battery cell 1000 according to the above-described embodiment of the present invention.

[0123] According to an embodiment of the present invention, the electrical equipment utilizes a battery cell 1000 according to the above embodiment of the present invention to provide a second insulating member 42 between the tab 71 and the cap 41 to separate the tab 71 and the cap 41, thereby reducing the possibility of contact between the tab 71 and the cap 41. At the same time, by fixing the position of the second insulating member 42, the second insulating member 42 is confined between the tab 71 and the cap 41, ensuring that the second insulating member 42 can stably separate the tab 71 and the cap 41, thereby reducing the possibility of leakage or short circuit of the battery cell 1000 and improving the safety of the electrical equipment.

[0124] Other configurations and operations of the battery cells according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0125] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0126] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0127] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0128] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0129] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cover assembly (1) for a battery cell, characterized in that, The electrode assembly (70) of the battery cell (1000) has tabs (71), and the cover assembly (1) includes: The cover part (10) is provided with a clearance through hole (11), and the pole lug (71) passes through the clearance through hole (11). Cap (41), the cap (41) is used to cover the clearance through hole (11); The first insulating element (30) is disposed on the side of the cover portion (10) facing away from the cap (41); The second insulating member (42) is disposed between the cap (41) and the tab (71), and the second insulating member (42) is fixedly connected to the cap (41) and / or the first insulating member (30); An electrical connector and a terminal post (51) are provided. The electrical connector is located on the side of the first insulating member (30) facing away from the cover portion (10). The electrical connector is electrically connected to the terminal lug (71). The cover (10) is provided with a first mounting hole (12), and the first insulating member (30) is provided with a third mounting hole (32). The pole post (51) passes through the first mounting hole (12) and the third mounting hole (32) in sequence to be electrically connected to the electrical connecting piece.

2. The cover assembly (1) of the battery cell according to claim 1, characterized in that, The electrical connector has a second mounting hole, and the pole (51) passes through the first mounting hole (12), the third mounting hole (32) and the second mounting hole in sequence to be electrically connected to the electrical connector.

3. The cover assembly (1) of the battery cell according to claim 1, characterized in that, The first insulating member (30) has a protrusion (31) facing the cover portion (10), the protrusion (31) passing through the clearance through hole (11) and located between the clearance through hole (11) and the tab (71).

4. The cover assembly (1) of the battery cell according to claim 3, characterized in that, The second insulating member (42) is fixedly connected to the first insulating member (30), and the second insulating member (42) covers the protrusion (31) and is fixedly engaged with the protrusion (31).

5. The cover assembly (1) of the battery cell according to claim 4, characterized in that, The second insulating element (42) and the protrusion (31) are engaged.

6. The cover assembly (1) of the battery cell according to claim 5, characterized in that, One of the second insulating member (42) and the protrusion (31) is provided with a hook (311), and the other is provided with a groove (422) that engages with the hook (311).

7. The cover assembly (1) of the battery cell according to claim 1, characterized in that, The cap (41) and the second insulating element (42) are fixedly connected.

8. The cover assembly (1) of the battery cell according to claim 7, characterized in that, One of the second insulating member (42) and the cap (41) is provided with a groove (431), and the other is provided with a protrusion (432) that cooperates with the groove (431).

9. The cover assembly (1) of the battery cell according to claim 8, characterized in that, The cap (41) defines a first inner cavity, and the second insulating member (42) is located in the first inner cavity and defines a second inner cavity (421). One of the groove (431) and the protrusion (432) is located on the inner top wall of the cap (41), and the other of the groove (431) and the protrusion (432) is located on the outer top wall of the second insulating member (42). Alternatively, one of the groove (431) and the protrusion (432) may be located on the inner wall of the cap (41), and the other of the groove (431) and the protrusion (432) may be located on the outer wall of the second insulating member (42).

10. The cover assembly (1) of the battery cell according to any one of claims 1-9, characterized in that, An adhesive portion is provided between the second insulating member (42) and the cap (41).

11. The cover assembly (1) of the battery cell according to claim 10, characterized in that, The cap (41) defines a first inner cavity, and the second insulating member (42) is located in the first inner cavity and defines a second inner cavity (421). The adhesive portion is located between the inner top wall of the cap (41) and the outer top wall of the second insulating member (42); Alternatively, the adhesive portion is located between the inner wall of the cap (41) and the outer wall of the second insulating member (42).

12. The cover assembly (1) of the battery cell according to claim 1, characterized in that, The cover portion (10) has an annular groove (13) on the side opposite to the first insulating member (30). The annular groove (13) surrounds the clearance through hole (11), and the cap (41) is sealed to the annular groove (13).

13. A casing for a single battery cell, characterized in that, include: The shell portion (60) has a mounting port at its end; Cover assembly (1), the cover assembly (1) is disposed at the mounting port, the cover assembly (1) is the cover assembly (1) according to any one of claims 1-12.

14. The casing of the battery cell according to claim 13, characterized in that, Both ends of the shell (60) are provided with the cover assembly (1), one of the cover assemblies (10) is provided with an explosion-proof valve (52), and the other cover assembly (1) is provided with an injection hole (53).

15. A single battery cell (1000), characterized in that, Includes the housing as described in claim 13 or 14.

16. An electrical appliance, characterized in that, Includes the battery cell (1000) as described in claim 15.

Images