Cover body assembly of battery monomer, shell of battery monomer, battery monomer and electric equipment

Abstract

The invention discloses a cover body assembly of a battery monomer, a shell of the battery monomer, the battery monomer and electric equipment, an electrode assembly of the battery monomer is provided with a pole lug, the cover body assembly of the battery monomer comprises a cover body part, the cover body part is provided with an avoiding through hole, and the pole lug is arranged in the avoiding through hole in a penetrating manner; the cover cap is used for sealing and covering the avoiding through hole; the first insulating part is arranged on one side, opposite to the cover cap, of the cover body part; and the second insulating part is arranged between the cap and the tab, and the second insulating part is fixedly connected with the cap and / or the first insulating part. According to the cover body assembly of the single battery provided by the embodiment of the invention, the second insulating part is arranged between the tab and the cover cap to separate the tab from the cover cap, so that the possibility of contact between the tab and the cover cap is reduced, and meanwhile, the position of the second insulating part is fixed to limit the second insulating part between the tab and the cover cap, so that the reliability of the battery is improved. And the possibility of electric leakage or short circuit of the single battery is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery cell cover assembly and a battery cell shell, a battery cell, and an electrical device. Background Art

[0002] Power batteries are the power source for tools, mostly referring to the batteries that power electric cars, electric trains, electric bicycles, and golf carts. Power batteries are the core components of new energy vehicles. New energy vehicles have become an important part of the sustainable development of the automotive industry due to their energy-saving and environmental protection advantages. For new energy vehicles, battery technology is an important factor related to their development.

[0003] In the related art, an avoidance through hole is provided on the cover of the battery shell, the pole ear is passed through the avoidance through hole, and the cover cap is covered on the avoidance through hole to close the avoidance through hole. However, there is a risk of contact between the pole ear and the cover cap, which may easily cause battery leakage. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery cell cover assembly, in which a second insulating member is arranged between the pole ear and the cap to separate the pole ear and the cap, thereby reducing the possibility of contact between the pole ear and the cap, and at the same time, by fixing the position of the second insulating member to limit the second insulating member between the pole ear and the cap, it is ensured that the second insulating member can stably separate the pole ear and the cap, thereby reducing the possibility of leakage or short circuit of the battery cell.

[0005] The present invention also provides a housing having the battery cell.

[0006] The present invention also provides a battery cell having the battery cell cover assembly.

[0007] The present invention also provides an electric device having the battery cell.

[0008] According to the first aspect of the present invention, the cover assembly of the battery cell comprises: a cover portion, the cover portion is provided with an avoidance through hole, and the pole ear is passed through the avoidance through hole; a cap, the cap is used to seal the avoidance through hole; a first insulating member, the first insulating member is arranged on the side of the cover portion facing away from the cap; a second insulating member, the second insulating member is arranged between the cap and the pole ear, wherein the second insulating member is fixedly connected to the cap and / or the first insulating member.

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

[0010] In addition, the cover assembly of the battery cell according to the above embodiment 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 is provided with a protruding portion protruding toward the cover body portion, and the protruding portion passes through the avoidance through hole and is located between the avoidance through hole and the pole ear.

[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 protruding portion and fixedly matched with the protruding portion.

[0013] According to some specific embodiments of the present invention, the second insulating member and the protrusion are snap-fitted.

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

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

[0016] According to some optional embodiments of the present invention, one of the second insulating member and the cover cap is provided with a groove, and the other is provided with a protrusion matching 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 an inner top wall of the cap, and the other of the groove and the protrusion is provided on an outer top wall of the second insulating member; or, one of the groove and the protrusion is provided on an inner side wall of the cap, and the other of the groove and the protrusion is provided on an 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 optional 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 the adhesive portion is located between an inner top wall of the cap and an outer top wall of the second insulating member; and\or, the adhesive portion is located between an inner side wall of the cap and an outer side wall of the second insulating member.

[0020] According to some optional embodiments of the present invention, an annular groove is provided on a side of the cover body facing away from the first insulating member, the annular groove is arranged around the avoidance through hole, and the cover cap is sealingly matched with the bottom wall of the annular groove.

[0021] According to a second aspect of the present invention, a battery cell shell is provided, the battery cell shell comprising: a shell portion, an end of the shell portion is provided with a mounting opening; according to the embodiment of the first aspect of the present invention, a battery cell cover assembly is provided at the mounting opening.

[0022] In the shell of the battery cell according to an embodiment of the present invention, a second insulating member is arranged between the pole ear and the cap to separate the pole ear and the cap, thereby reducing the possibility of contact between the pole ear and the cap. At the same time, the position of the second insulating member is fixed to confine the second insulating member between the pole ear and the cap, thereby ensuring that the second insulating member can stably separate the pole ear and the cap, thereby reducing the possibility of leakage or short circuit of the battery cell.

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

[0024] According to a third aspect of the present invention, a battery cell is provided. The battery cell includes a housing of the battery cell according to the embodiment of the second aspect of the present invention.

[0025] According to the battery cell of the embodiment of the present invention, a second insulating member is arranged between the pole ear and the cap to separate the pole ear and the cap, thereby reducing the possibility of contact between the pole ear and the cap. At the same time, by fixing the position of the second insulating member to confine the second insulating member between the pole ear and the cap, it is ensured that the second insulating member can stably separate the pole ear and the cap, thereby reducing the possibility of leakage or short circuit of the battery cell.

[0026] According to a fourth aspect of the present invention, an electric device is provided. The electric device includes the battery cell according to the embodiment of the third aspect of the present invention.

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

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0035] Figure 6 yes Figure 5 A magnified view of a part in the middle;

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

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

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

[0039] Fig.10 yes Fig. 9 The enlarged view of point A in the middle;

[0040] Fig.11 is a schematic structural diagram of a second insulating member according to an embodiment of the present invention;

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

[0042] Fig.13 is a schematic structural diagram of a second insulating member according to some embodiments of the present invention;

[0043] Fig.14 is a schematic structural diagram of a cap according to some embodiments of the present invention;

[0044] Fig.15 is a schematic structural diagram of a second insulating member according to some embodiments of the present invention;

[0045] Fig.16 is a schematic structural diagram of a cap according to some embodiments of the present invention;

[0046] Fig.17 is a structural schematic diagram of a cover body according to an embodiment of the present invention;

[0047] Fig.18 is a schematic structural diagram of a battery cell according to an embodiment of the present invention;

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

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

[0050] Fig.21 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, avoidance through hole 11, first mounting hole 12, annular groove 13,

[0053] The first insulating member 30, the protruding portion 31, the hook 311, the guide surface 312, the stop surface 313, the connecting arm 314, the third mounting hole 32,

[0054] The cap 41, the flange 411, the second insulating member 42, the second inner cavity 421, the slot 422, the groove 431, the protrusion 432, the pole 51, the explosion-proof valve 52, the injection hole 53,

[0055] Shell 60 , electrode assembly 70 , and electrode tab 71 . DETAILED DESCRIPTION

[0056] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0057] The following describes a cover assembly 1 of a battery cell according to an embodiment of the present invention with reference to the accompanying drawings.

[0058] like Figure 1-Figure 6 As shown, the cover assembly 1 of the battery cell according to the 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 . The cover portion 10 is provided with an escape hole 11 . The tab 71 is passed through the escape hole 11 .

[0060] Among them, the pole ear 71 is directly inserted into the avoidance through hole 11 to reserve a position for the pole ear 71. This method does not need to bend the pole ear 71, which is convenient for reducing the space occupied by the pole ear 71 on the inner side of the cover body 10, and further convenient for reserving more space for the electrode assembly 70 in the battery cell 1000, so as to improve the energy density of the battery cell 1000 and increase the capacity of the battery cell 1000.

[0061] The cap 41 is used to cover the avoidance through hole 11 to protect the components located inside the cover body 10. For example, by covering the avoidance through hole 11 with the cap 41, 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 disposed on the side of the cover body 10 facing away from the cap 41 to separate the cover body 10 from the charged parts inside the cover body 10, such as separating the cover body 10 from the electrode assembly 70, thereby reducing the possibility of contact between the cover body 10 and the electrode assembly 70, and reducing the possibility of leakage or short circuit of the battery cell 1000.

[0063] The second insulating member 42 is disposed between the cap 41 and the tab 71 to separate the cap 41 and the tab 71 , thereby preventing the tab 71 from directly contacting the cap 41 and preventing the battery cell 1000 from leaking or shorting.

[0064] Among them, the second insulating member 42 is fixedly connected to the cap 41 and / or the first insulating member 30, so that the position of the second insulating member 42 can be limited by using the first insulating member 30 or the cap 41, so that the second insulating member 42 is located between the cap 41 and the pole ear 71 to prevent the second insulating member 42 from falling off, so as to ensure that the second insulating member 42 can stably separate the cap 41 and the pole ear 71, thereby reducing the possibility of leakage or short circuit of the battery cell.

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

[0066] According to the cover body assembly 1 of the battery cell according to an embodiment of the present invention, a second insulating member 42 is arranged between the pole ear 71 and the cap 41 to separate the pole ear 71 and the cap 41, thereby reducing the possibility of contact between the pole ear 71 and the cap 41. At the same time, by fixing the position of the second insulating member 42 to confine the second insulating member 42 between the pole ear 71 and the cap 41, it is ensured that the second insulating member 42 can stably separate the pole ear 71 and the cap 41, thereby reducing the possibility of leakage or short circuit of the battery cell 1000.

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

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

[0069] In some embodiments of the present invention, 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 the position of the second insulating member 42 is limited by at least one of the first insulating member 30 and the cap 41, so that the second insulating member 42 can always separate the cap 41 and the tab 71 to prevent the tab 71 from directly contacting the cap 41, thereby preventing the battery cell 1000 from leaking or short-circuiting.

[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 and fixed to the cover body 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 and fixed to the cover body 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, Figure 2 As shown, the first insulating member 30 is provided with a protrusion 31 protruding toward the cover body 10, and the protrusion 31 is penetrated through the avoidance through hole 11 and is located between the avoidance through hole 11 and the pole ear 71 to prevent the pole ear 71 from directly contacting the hole edge of the avoidance through hole 11, thereby preventing the current on the pole ear 71 from flowing to the cover body 10, thereby reducing the possibility of leakage or short circuit of the battery cell 1000.

[0075] In some embodiments, the protrusion 31 is an annular protrusion, which extends along the circumference of the avoidance hole 11 to fully separate the hole edge of the avoidance hole 11 and the portion of the pole ear 71 extending into the avoidance hole 11, thereby reducing the possibility of leakage or short circuit of the battery cell 1000.

[0076] In some optional embodiments of the present invention, Figure 4-Figure 6 As shown, the second insulating member 42 is fixedly connected to the first insulating member 30, and the second insulating member 42 is covered on the protrusion 31, so as to utilize the second insulating member 42 and the protrusion 31 to separate the cap 41 and the pole ear 71, so as to prevent the pole ear 71 from contacting the cap 41 and preventing the battery cell 1000 from leakage or short circuit.

[0077] Among them, the second insulating member 42 is fixedly matched 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 pole ear 71 to avoid direct contact between the pole ear 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 avoidance through hole 11 to the outside of the cover 10, and the second insulating member 42 is located outside the cover 10, so that the second insulating member 42 and the protrusion 31 can be easily installed and matched, thereby reducing the difficulty of operation.

[0079] In some embodiments, Figure 4As shown, the cap 41 defines a first inner cavity, the second insulating member 42 is located in the first inner cavity, and the second insulating member 42 defines a second inner cavity 421, and the second insulating member 42 covers the protrusion 31, that is, the protrusion 31 is located in the second inner cavity 421, so that the cap 41 and the second insulating member 42 can be used to protect the protrusion 31 extending into the avoidance through hole 11, and at the same time, the protrusion 31 and the second insulating member 42 are used to separate the pole ear 71 and the side wall of the first inner cavity, thereby reducing the possibility of contact between the pole ear 71 and 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, Figure 5 , Figure 6 As shown, the second insulating member 42 and the protruding portion 31 are snap-fitted together. This installation method is simple and convenient, and is easy to operate, so that the second insulating member 42 and the protruding portion 31 can be fixedly matched quickly and accurately.

[0081] The protrusion 31 extends from the avoidance through hole 11 to the outside of the cover body 10, and the second insulating member 42 is located outside the cover body 10, which facilitates the installation and matching of the second insulating member 42 and the first insulating member, thereby reducing the difficulty of operation.

[0082] In addition, by snap-fitting the second insulating member 42 and the protrusion 31 , the second insulating member 42 and the protrusion 31 can be detachably matched, thereby facilitating the subsequent disassembly of the second insulating member 42 and the protrusion 31 to facilitate replacement or repair of parts 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 slot 422 , and the slot 422 cooperates with the hook 311 , thereby enabling snap-fitting of the second insulating member 42 and the protrusion 31 .

[0084] Among them, the second insulating member 42 and the protrusion 31 are fixed together by the structural design of the hook 311 and the slot 422, the position of the second insulating member 42 is limited, and the second insulating member 42 is used to achieve insulation between the cap 41 and the tab 71. The hook 311 and the slot 422 have a simple structure and low manufacturing cost, and will not fall off and fail due to long-term infiltration of the electrolyte, thereby improving the firmness of the second insulating member 42.

[0085] In some examples, such as Figure 7-Figure 11 As shown, hooks 311 are provided on both sides of the length direction of the protrusion 31, and slots 422 are provided on both sides of the length direction of the second insulating member 42. The two hooks 311 and the two slots 422 are correspondingly snap-fitted to stably fix the protrusion 31 and the second insulating member 42 together.

[0086] In some examples, such as Figure 4 , Figure 6 and Fig.10 As shown, the second insulating member 42 defines a second inner cavity 421, and the second inner cavity 421 is provided with a groove 422 running through its thickness direction on two side walls opposite to each other in the length direction of the second insulating member 42, and two hooks 311 are provided on the protrusion 31, and the two hooks 311 are matched with the two grooves 422 in a one-to-one manner, wherein the protrusion 31 is connected to the hook 311 through a connecting arm 314, and the hook 311 includes a guide surface 312 and a stop surface 313, and the guide surface 312 is located on the side of the hook 311 facing the groove 422, and the two guide surfaces 312 extend from the inside to the outside in a direction close to each other, and the stop surface 313 extends in a horizontal direction.

[0087] When the second insulating member 42 is fixed to the protrusion 31, the second insulating member 42 first cooperates with the guide surface 312. Since the two hooks 311 are subjected to the force of the side wall of the second inner cavity 421, under the guidance of the guide surface 312, the two connecting arms 314 and the hooks 311 will move in a direction close to each other, so that the second insulating member 42 can smoothly move toward the direction close to the cover body 10. When moving to the corresponding position and the hooks 311 are opposite to the slots 422, the two connecting arms 314 restore their deformation and move in a direction away from each other, at which time the two hooks 311 are driven to move in a direction away from each other and extend into the corresponding slots 422, and the abutment surface 313 is abutted against the bottom wall of the slot 422 to achieve a snap fit between the hooks 311 and the slot 422.

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

[0089] In other examples, a card slot 422 is provided on both sides of the length direction of the protrusion 31, and a hook 311 is provided on both sides of the length direction of the second insulating member 42. The two hooks 311 and the two card slots 422 are correspondingly snap-fitted to stably fix 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 being out of engagement, so that the cap 41 can cover the avoidance through hole 11 and the second insulating member 42 can separate the cap 41 and the tab 71 .

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

[0092] In some embodiments, the protrusion 432 and the groove 431 are abutted and fixed, 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 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 fixed fit between the second insulating member 42 and the cap 41 .

[0094] In some specific embodiments of the present invention, Figure 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 disposed on the inner top wall of the cap 41, and the other of the groove 431 and the protrusion 432 is disposed 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 Fig.12 As shown, the inner top wall of the cap 41 is provided with a groove 431, and the outer top wall of the second insulating member 42 is provided with a protrusion 432. In other examples, such as Fig.15 , Fig.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 disposed on the inner wall of the cap 41, and the other of the groove 431 and the protrusion 432 is disposed on the outer 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.

[0098] Among them, the two inner side walls of the cap 41 may be provided with one of the grooves 431 and the protrusions 432, and the two outer side walls of the second insulating member 42 may be provided with the other of the grooves 431 and the protrusions 432; or one of the inner side walls of the cap 41 may be provided with one of the grooves 431 and the protrusions 432, and the corresponding outer side wall of the second insulating member 42 may be provided with the other of the grooves 431 and the protrusions 432.

[0099] In some examples, the inner side wall of the cap 41 is provided with a groove 431, and the outer side wall of the second insulating member 42 is provided with a protrusion 432. In other examples, the inner side wall of the cap 41 is provided with a protrusion 432, and the outer side wall of the second insulating member 42 is provided with 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 using 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, and the second insulating member 42 and the cap 41 can be glued together by the adhesive portion, 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 pole ear 71 and the cap 41.

[0102] In some optional embodiments of the present 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 insulating member 42 to bond and fix the second insulating member 42 and the cap 41 together.

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

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

[0106] In some embodiments of the present invention, Fig.17 As shown, an annular groove 13 is provided on the side of the cover body 10 facing away from the first insulating member 30. The annular groove 13 is arranged around the avoidance through hole 11, and the cap 41 is sealed with the bottom wall of the annular groove 13, so that it is convenient to hide the connection structure between the cap 41 and the cover body 10, such as hiding the weld between the cap 41 and the cover body 10, so as to improve the appearance.

[0107] In some embodiments, Fig.11 , Fig.17As shown, the cover body 10 and the cap 41 are both metal parts. The cap 41 has a flange 411 on one end facing the cover body 10. 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 the through hole 11 using the cap 41.

[0108] In some embodiments of the present invention, the cover assembly 1 also includes an electrical connection sheet, which is suitable for being electrically connected to the pole ear 71. The current at the pole ear 71 will flow to the electrical connection sheet and then output the current to the outside through the electrical connection sheet to realize power supply of the battery cell 1000.

[0109] Among them, the electrical connecting piece is located on the side of the first insulating member 30 facing away from the cover body 10, so as to utilize the first insulating member 30 to separate the cover body 10 and the electrical connecting piece to avoid contact between the electrical connecting piece and the cover body 10, and to avoid current on the electrical connecting piece from flowing to the cover body 10, so as to reduce the possibility of leakage of the battery cell 1000.

[0110] In some optional embodiments of the present invention, Figure 2 As shown, the cover body 10 is provided with a first mounting hole 12, the electrical connecting plate is provided with a second mounting hole, and the cover body assembly 1 also includes a pole 51, which is respectively installed in the first mounting hole 12 and the second mounting hole to be electrically connected to the electrical connecting plate. The current at the pole ear 71 flows to the pole 51 through the electrical connecting plate, and the current is output to the outside through the pole 51 to realize power supply of the battery cell 1000.

[0111] A third annular insulating member is provided between the pole 51 and the cover 10 to separate the pole 51 and the cover 10 to prevent the pole 51 from directly contacting the cover 10 and to prevent the battery cell 1000 from leaking electricity.

[0112] In some embodiments, the pole 51 is welded to the electrical connection sheet to achieve electrical connection. The pole 51 fixes the electrical connection sheet and the cover body 10 together and the third insulating member separates the pole 51 and the cover body 10. The first insulating member 30 separates the electrical connection sheet and the cover body 10. It can be understood that the first insulating member 30 is located between the electrical connection sheet and the cover body 10. Since the pole 51 is welded and fixed to the electrical connection sheet, and the first insulating member 30 is clamped between the cover body 10 and the electrical connection sheet, 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.

[0113] In some examples, such as Figure 8As shown, a third mounting hole 32 is provided on the first insulating member 30, and the pole 51 passes through the first mounting hole 12, the third mounting hole 32 and the second mounting hole in sequence to achieve electrical connection between the pole 51 and the electrical connecting plate, and the pole 51 is used to fix the cover body 10, the first insulating member 30 and the electrical connecting plate together.

[0114] The housing of the battery cell according to the embodiment of the present invention is described below. The housing of the battery cell according to the embodiment of the present invention comprises a shell portion 60 and a cover assembly 1 of the battery cell according to the above embodiment of the present invention.

[0115] An installation opening is provided at the end of the shell 60 , and the cover assembly 1 is provided at the installation opening so that the cover assembly 1 can be used to cover the installation opening to provide protection for the components of the battery cell 1000 located in the shell 60 .

[0116] In some embodiments, the cover portion 10 is welded and fixed to the housing to close the installation opening.

[0117] In the shell of the battery cell according to an embodiment of the present invention, a second insulating member 42 is arranged between the pole ear 71 and the cap 41 to separate the pole ear 71 and the cap 41, thereby reducing the possibility of contact between the pole ear 71 and the cap 41. At the same time, by fixing the position of the second insulating member 42 to confine the second insulating member 42 between the pole ear 71 and the cap 41, it is ensured that the second insulating member 42 can stably separate the pole ear 71 and the cap 41, thereby reducing the possibility of leakage or short circuit of the battery cell 1000.

[0118] In some embodiments of the present invention, Figure 18-Figure 21 As shown, both ends of the shell 60 are provided with a cover assembly 1, and the cover 10 in one of the two cover assemblies 1 is provided with an explosion-proof valve 52. When the pressure inside the shell exceeds a preset safety value, the explosion-proof valve 52 will automatically open to release the gas accumulated inside, thereby reducing the pressure and preventing the battery cell 1000 from rupturing or exploding. The cover 10 in the other cover assembly 1 is provided with a liquid injection hole 53, and the electrolyte can be added into the shell 60 through the liquid injection hole 53, so that the electrode assembly 70 can react chemically with the electrolyte, so that the battery cell 1000 can be charged or discharged.

[0119] By separately arranging the explosion-proof valve 52 and the injection hole 53 on the two cover body assemblies 1, the positions of the explosion-proof valve 52 and the injection hole 53 on the shell can be reasonably arranged to avoid excessive crowding or dispersion of parts in the shell space.

[0120] In some examples, the electrode assembly 70 includes a positive electrode tab and a negative electrode tab, and the two cover assemblies 1 are respectively a first cover assembly and a second cover assembly. The cover assembly 1 also includes an electrical connecting plate, the positive electrode tab is electrically connected to the electrical connecting plate in the first cover assembly, and the negative electrode tab is electrically connected to the electrical connecting plate in the second cover assembly. An injection hole 53 is provided on the cover portion 10 in the first cover assembly, and an explosion-proof valve 52 is provided on the cover portion 10 in the second cover assembly.

[0121] The battery cell 1000 according to the embodiment of the present invention is described below. The battery cell 1000 according to the embodiment of the present invention includes the housing of the battery cell according to the above-mentioned embodiment of the present invention.

[0122] In the battery cell 1000 according to an embodiment of the present invention, a second insulating member 42 is arranged between the pole lug 71 and the cap 41 to separate the pole lug 71 and the cap 41, thereby reducing the possibility of contact between the pole lug 71 and the cap 41. At the same time, by fixing the position of the second insulating member 42 to confine the second insulating member 42 between the pole lug 71 and the cap 41, it is ensured that the second insulating member 42 can stably separate the pole lug 71 and the cap 41, thereby reducing the possibility of leakage or short circuit of the battery cell 1000.

[0123] The following describes an electric device according to an embodiment of the present invention. The electric device according to an embodiment of the present invention includes a battery cell 1000 according to the above-mentioned embodiment of the present invention.

[0124] According to the electrical equipment of the embodiment of the present invention, by utilizing the battery cell 1000 according to the above-mentioned embodiment of the present invention, a second insulating member 42 is set between the pole ear 71 and the cap 41 to separate the pole ear 71 and the cap 41, thereby reducing the possibility of contact between the pole ear 71 and the cap 41. At the same time, by fixing the position of the second insulating member 42 to confine the second insulating member 42 between the pole ear 71 and the cap 41, it is ensured that the second insulating member 42 can stably separate the pole ear 71 and the cap 41, thereby reducing the possibility of leakage or short circuit of the battery cell 1000, thereby improving the safety of the electrical equipment.

[0125] Other structures and operations of the battery cell according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0126] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0127] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0128] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0129] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0130] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cell cover assembly (1), characterized in that: The electrode assembly (70) of the battery cell (1000) has a tab (71), and the cover assembly (1) comprises: A cover body (10), wherein the cover body (10) is provided with an avoidance through hole (11), and the pole lug (71) is passed through the avoidance through hole (11); A cover cap (41), the cover cap (41) being used for covering the avoidance through hole (11); A first insulating member (30), the first insulating member (30) being arranged on a side of the cover body (10) facing away from the cover cap (41); a second insulating member (42), the second insulating member (42) being disposed between the cap (41) and the tab (71), Wherein, the second insulating member (42) is fixedly connected to the cover cap (41) and / or the first insulating member (30).

2. The battery cell cover assembly (1) according to claim 1, characterized in that: The first insulating member (30) is provided with a protruding portion (31) facing the cover body (10); the protruding portion (31) is passed through the avoidance through hole (11) and is located between the avoidance through hole (11) and the pole ear (71).

3. The battery cell cover assembly (1) according to claim 2, characterized in that: The second insulating member (42) is fixedly connected to the first insulating member (30); the second insulating member (42) is covered on the protruding portion (31) and fixedly matched with the protruding portion (31).

4. The battery cell cover assembly (1) according to claim 3, characterized in that: The second insulating member (42) and the protruding portion (31) are snap-fitted.

5. The battery cell cover assembly (1) according to claim 4, characterized in that: One of the second insulating member (42) and the protruding portion (31) is provided with a hook (311), and the other is provided with a slot (422) that cooperates with the hook (311).

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

7. The battery cell cover assembly (1) according to claim 6, characterized in that: One of the second insulating member (42) and the cover cap (41) is provided with a groove (431), and the other is provided with a protrusion (432) matching with the groove (431).

8. The battery cell cover assembly (1) according to claim 7, 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). Wherein, 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); Alternatively, one of the groove (431) and the protrusion (432) is provided on the inner side wall of the cap (41), and the other of the groove (431) and the protrusion (432) is provided on the outer side wall of the second insulating member (42).

9. The battery cell cover assembly (1) according to any one of claims 1 to 8, characterized in that: An adhesive portion is provided between the second insulating member (42) and the cover cap (41).

10. The battery cell cover assembly (1) according to claim 9, 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). Wherein, 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); And\or, the adhesive portion is located between the inner wall of the cap (41) and the outer wall of the second insulating member (42).

11. The battery cell cover assembly (1) according to claim 1, characterized in that: An annular groove (13) is provided on the side of the cover body (10) facing away from the first insulating member (30), the annular groove (13) is arranged around the avoidance through hole (11), and the cover cap (41) is sealingly matched with the annular groove (13).

12. A battery cell housing, characterized in that: include: A shell portion (60), wherein an end portion of the shell portion (60) is provided with a mounting opening; A cover assembly (1), wherein the cover assembly (1) is arranged at the installation opening, and the cover assembly (1) is the cover assembly (1) according to any one of claims 1 to 11.

13. The battery cell housing according to claim 12, characterized in that: The two ends of the shell (60) are provided with the cover body assembly (1), the cover body assembly (10) in one of the two cover body assemblies (1) is provided with an explosion-proof valve (52), and the cover body assembly (10) in the other cover body assembly (1) is provided with a liquid injection hole (53).

14. A battery cell (1000), characterized in that: Comprising the housing as claimed in claim 12 or 13.

15. An electrical equipment, characterized in that: Comprising the battery cell (1000) as claimed in claim 14.

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