Battery and battery pack and electric device having the same

Abstract

The utility model discloses a kind of battery and the battery pack and electric device with it, the battery includes: shell;At least one electric connection component, each electric connection component is located in the shell, each electric connection component is interference and sealed cooperation with the shell, to separate independent holding cavity on the two sides of the electric connection component;Multiple battery cells, each battery cell is located in the holding cavity, and two adjacent battery cells are connected in series by the electric connection component.According to the battery of the utility model embodiment, by making electric connection component and shell interference sealed cooperation, multiple independent holding cavities are separated in shell, and multiple battery cells are one-to-one corresponding and arranged in multiple holding cavities, a shell can form a battery with larger voltage, so as to improve the utilization of space in battery and improve the capacity of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery, a battery pack having the same, and an electrical device thereof. Background Technology

[0002] In related technologies, when battery cells are connected in series, the battery cells themselves have soft or hard shells. After connecting multiple battery cells in series, a shell needs to be set on the outside of the multiple battery cells, resulting in the shell occupying a lot of space. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery in which the electrical connection components are interference-sealed with the casing to divide the casing into multiple independent holding cavities. Multiple battery cells are correspondingly arranged in multiple holding cavities. A battery with a large voltage can be formed using a single casing, which facilitates the improvement of the utilization rate of the battery's internal space and increases the battery's capacity.

[0004] This utility model also proposes an electrical device having the aforementioned battery.

[0005] A battery according to a first aspect of the present invention includes: a housing; at least one electrical connection component, each of the electrical connection components being disposed within the housing, each of the electrical connection components being interference-fitted and sealingly fitted with the housing to separate independent holding cavities on both sides of the electrical connection component; and a plurality of battery cells, each of the battery cells being disposed within the holding cavity, with adjacent battery cells connected in series through the electrical connection component.

[0006] According to the battery of this utility model embodiment, by making the electrical connection component and the housing interference seal fit, the housing is divided into multiple independent holding cavities, and multiple battery cells are arranged one-to-one in the multiple holding cavities. A battery with a large voltage can be formed by using a single housing, which facilitates the utilization of the internal space of the battery and increases the battery capacity.

[0007] In addition, the battery according to the above embodiments of the present invention may also have the following additional technical features: According to some embodiments of the present invention, a portion of the housing is recessed toward the electrical connection assembly to form a sealing protrusion, the sealing protrusion contacting the electrical connection assembly for an interference fit; and / or, the electrical connection assembly includes a connecting body portion and a sealing ring, the sealing ring being sleeved on the connecting body portion and contacting the housing.

[0008] According to some embodiments of the present invention, the electrical connection assembly includes: an electrical connector, wherein two adjacent battery cells are connected in series; a support portion, wherein the support portion defines a mounting cavity, and at least a portion of the electrical connector is located in the mounting cavity; and a sealing ring, wherein the sealing ring is sleeved on the support portion, and the housing is sealed to the sealing ring.

[0009] According to some optional embodiments of the present invention, the electrical connector includes two electrical connection parts, the portion of each electrical connection part located inside the mounting cavity is electrically connected to the adjacent electrical connection part, and the portion of each electrical connection part located outside the mounting cavity is electrically connected to the battery cell. The two electrical connection parts have welding fixing surfaces facing each other, and the welding fixing surfaces are provided with exhaust channels.

[0010] According to some optional embodiments of the present invention, the support portion defines an annular limiting groove, the sealing ring is located within the limiting groove, a portion of the housing defines a sealing protrusion, the sealing protrusion extends into the limiting groove and contacts the sealing ring.

[0011] According to some specific embodiments of the present invention, the limiting groove includes a limiting bottom wall and an annular limiting peripheral wall. The limiting peripheral wall is formed as an inclined surface extending obliquely toward the limiting bottom wall. The sealing ring contacts the limiting bottom wall and the limiting peripheral wall respectively. The sealing protrusion contacts the portion of the sealing ring located on the limiting bottom wall and the limiting peripheral wall.

[0012] In some embodiments, the angle between the extending direction of the limiting peripheral wall and the first direction is β, 15°≤β≤60°, and the first direction is the arrangement direction of adjacent battery cells; and / or, the portion of the sealing protrusion corresponding to the limiting peripheral wall is a sealing peripheral wall, the sealing peripheral wall is an inclined surface, wherein the angle between the extending direction of the sealing peripheral wall and the first direction is γ, 10°≤γ≤50°.

[0013] According to some optional embodiments of the present invention, the battery further includes a spacer located between the electrical connector and the battery cell, wherein a portion of the battery cell's tab is adapted to pass through the spacer and is clamped between the electrical connector and the spacer.

[0014] According to some specific embodiments of the present invention, one of the support portion and the spacer ring has a snap-fit ​​portion, and the other has a snap-fit ​​engagement portion that snaps into the snap-fit ​​portion.

[0015] According to some optional embodiments of the present invention, the spacer includes a first spacer portion and a second spacer portion that can be separably fitted along a second direction, the second direction being perpendicular to the arrangement direction of adjacent battery cells.

[0016] According to some optional embodiments of the present invention, the battery further includes: a fusible fuse, the fuse being electrically connected to the electrical connector and the housing.

[0017] According to some specific embodiments of the present invention, the safety component includes: a conductive ring defining a movable cavity; a fusible safety part, a portion of which is located within the movable cavity and contacts the electrical connector for electrical connection; and a pre-tightening part located within the movable cavity, one end of which abuts against the wall of the movable cavity and the other end of which abuts against the safety part to apply a pre-tightening force toward the electrical connector to the safety part.

[0018] In some embodiments, the support portion is provided with a plug-in groove, the plug-in groove is connected to the mounting cavity, the safety element passes through the housing and the sealing ring, and extends into the plug-in groove to electrically engage with the electrical connector.

[0019] According to some optional embodiments of the present invention, the two parts of the housing located on both sides of the electrical connection assembly are conductive metal parts of different materials.

[0020] A battery pack is provided according to a second aspect of the present invention, the battery pack comprising the battery described in the first aspect of the present invention.

[0021] According to the battery pack of the present invention, by using the battery described in the first aspect of the present invention, the electrical connection component is pressurized to fit the housing to divide the housing into multiple independent holding cavities. Multiple battery cells are arranged one-to-one in the multiple holding cavities. A battery with a large voltage can be formed using a single housing, which facilitates the utilization of the internal space of the battery and increases the battery capacity.

[0022] According to a third aspect of the present invention, an electrical device is provided, the electrical device comprising a battery as described in the first aspect of the present invention or a battery pack as described in the second aspect of the present invention.

[0023] According to the embodiments of the present invention, the electrical device utilizes the battery described in the first aspect of the present invention or the battery pack described in the second aspect of the present invention. By making the electrical connection component and the housing interference-sealed, the housing is divided into multiple independent holding cavities. Multiple battery cells are arranged one-to-one in the multiple holding cavities. A battery with a large voltage can be formed using a single housing, which facilitates the improvement of the utilization rate of the battery internal space and increases the battery capacity.

[0024] Additional aspects and advantages of this 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

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded view of the battery structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the battery cell and electrical connection assembly according to an embodiment of the present utility model; Figure 3 This is an exploded view of the shell and cover according to an embodiment of the present utility model; Figure 4 This is an exploded view of the battery cell and electrical connection assembly according to an embodiment of the present utility model; Figure 5 This is an exploded view of the battery cell and electrical connection assembly according to an embodiment of the present utility model; Figure 6 yes Figure 5 Enlarged view of point A in the middle; Figure 7 This is a partially enlarged cross-sectional view of a battery according to an embodiment of the present utility model; Figure 8 This is a partially enlarged cross-sectional view of the battery cell and electrical connection assembly according to an embodiment of the present utility model; Figure 9 This is a partially enlarged cross-sectional view of the battery cell and electrical connection assembly according to an embodiment of the present utility model; Figure 10 This is a schematic diagram of the structure of the electrical connection assembly according to an embodiment of the present utility model; Figure 11 This is an exploded view of the electrical connection assembly according to an embodiment of the present utility model; Figure 12 This is a schematic diagram of the structure of the electrical connection portion according to an embodiment of the present utility model; Figure 13 This is a structural schematic diagram of the support portion and sealing ring according to an embodiment of the present utility model. Figure 14 yes Figure 13 Enlarged view of point B in the middle; Figure 15 This is a partially enlarged cross-sectional view of a battery according to an embodiment of the present utility model; Figure 16 yes Figure 15 Enlarged view of point C in the middle; Figure 17 This is an exploded view of the electrical connection assembly and fuse according to an embodiment of the present utility model; Figure 18This is a partially enlarged cross-sectional view of a battery according to an embodiment of the present utility model; Figure 19 A structural cross-sectional view of the safety component according to an embodiment of the present utility model; Figure 20 An exploded view of the structure of the safety component according to an embodiment of the present invention.

[0026] Attached image reference numerals: 1. Battery; 10. Housing; 12. Sealing protrusion; 121. Sealing peripheral wall; 15. Cover; 20. Electrical connection assembly; 21. Electrical connector; 211. Electrical connection part; 2111. First part; 2112. Second part; 212. Welding fixing surface; 213. Exhaust passage; 215. Mating groove; 22. Support part; 221. Mounting cavity; 222. Limiting groove; 223. Limiting bottom wall; 224. Limiting peripheral wall; 225. Insertion groove; 226. Snap-fit ​​part; 23. Sealing ring; 30. Battery cell; 31. Electrode tab; 40. Spacer ring; 41. First spacer ring section; 42. Second spacer ring section; 43. Snap-fitting section; 50. Safety component; 51. Conductive ring; 511. First conductive part; 512. Second conductive part; 513. Movable cavity; 514. Second limiting protrusion; 515. Conductive component; 516. Top plate; 52. Safety part; 521. First limit protrusion; 53. Pre-tightening part. Detailed Implementation

[0027] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0028] The battery 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0029] like Figures 1-6 As shown, the battery 1 according to an embodiment of the present invention includes a casing 10, at least one electrical connection assembly 20, and a plurality of battery cells 30.

[0030] Each electrical connection component 20 is disposed within the housing 10. Each electrical connection component 20 is interference-fitted and sealed to the housing 10 to separate independent holding cavities on both sides of the electrical connection component 20. Each battery cell 30 is disposed within the holding cavity. Two adjacent battery cells 30 are connected in series through the electrical connection component 20 to form a high-voltage battery 1.

[0031] Specifically, in the prior art, when battery cells are connected in series, the battery cells themselves have soft or hard shells. After multiple battery cells are connected in series, a shell needs to be set on the outside of the multiple battery cells, which results in the shell occupying more space in the battery.

[0032] This application only requires a housing 10, with the electrical connection component 20 located inside the housing 10 and tightly sealed to the housing 10. The housing 10 is divided into multiple holding cavities. The battery cells 30 are placed in the holding cavities and electrically connected to the electrical connection component 20. Electrolyte can then be injected into each holding cavity to form a large battery 1 from the multiple battery cells 30. That is, the housing 10 serves as both the housing 10 for each small battery 1 and the housing 10 for the entire large battery 1. There is no need to set up multiple housings 10, which facilitates the utilization of the internal space of the battery 1, increases the capacity of the battery 1, and reduces the production cost of the battery 1.

[0033] According to the embodiment of the present invention, the battery 1 is divided into multiple independent holding cavities by making the electrical connection component 20 and the housing 10 interference-sealed. Multiple battery cells 30 are disposed in the multiple holding cavities in a one-to-one correspondence. A battery 1 with a large voltage can be formed by using a housing 10, which is conducive to improving the utilization rate of the internal space of the battery 1 and increasing the capacity of the battery 1.

[0034] The battery 1 according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0035] In some specific embodiments of this utility model, such as Figures 1-6 As shown, the battery 1 includes a housing 10, at least one electrical connection assembly 20, and a plurality of battery cells 30.

[0036] In some embodiments of this utility model, such as Figure 1 , Figure 2 As shown, the battery 1 includes an electrical connection assembly 20 and two battery cells 30. The electrical connection assembly 20 divides the housing 10 into two independent holding cavities. The two battery cells 30 are respectively disposed in the two holding cavities. The electrical connection assembly 20 is electrically connected to the positive electrode tab of one of the battery cells 30 and electrically connected to the negative electrode tab of the other battery cell 30, so as to connect the two battery cells 30 in series.

[0037] In some embodiments, such as Figure 1 As shown, the battery 1 also includes two covers 15, the holding cavity has an opening, and the covers 15 are adapted to close the opening.

[0038] The cover 15 is welded and fixed to the shell 10 to close the opening of the holding cavity. The cover 15 is provided with a terminal post, which is electrically connected to the tab 31 of the corresponding battery cell 30 in the holding cavity. The terminals on the two covers 15 form a positive terminal post and a negative terminal post, respectively. The battery 1 is suitable for being electrically connected to the electrical device through the two terminals of the two covers 15.

[0039] In some embodiments, two cells 30 connected in series can form a battery with a voltage greater than or equal to 6.4V.

[0040] In some embodiments of this utility model, such as Figure 7 As shown, a portion of the housing 10 is recessed toward the electrical connection assembly 20 to form a sealing protrusion 12. The sealing protrusion 12 contacts the electrical connection assembly 20 to form an interference fit, thereby clamping the electrical connection assembly 20 with the sealing protrusion 12 and thus stably fixing the electrical connection assembly 20 inside the housing 10.

[0041] Specifically, after the electrical connection assembly 20 is installed into the housing 10, the housing 10 is processed so that a portion of the housing 10 is recessed toward the electrical connection assembly 20 to form a sealing protrusion 12. The sealing protrusion 12 contacts the electrical connection assembly 20 and forms an interference seal fit, thereby achieving an interference seal fit between the electrical connection assembly 20 and the housing 10. This eliminates the need for welding or fixing operations between the electrical connection assembly 20 and the housing 10, making the manufacturing process of the battery 1 simpler and improving production efficiency.

[0042] In some embodiments of this utility model, such as Figures 7-9 As shown, the electrical connection assembly 20 includes a connection body and a sealing ring 23. The sealing ring 23 is sleeved on the connection body and contacts the housing 10, so as to seal the gap between the connection body and the housing 10, thereby achieving an interference fit between the electrical connection assembly 20 and the housing 10.

[0043] In some embodiments, such as Figure 7 As shown, a portion of the housing 10 is recessed toward the electrical connection assembly 20 to form a sealing protrusion 12, which compresses the sealing ring 23, thereby achieving an interference-sealed fit between the housing 10 and the electrical connection assembly 20.

[0044] In some optional embodiments of this utility model, adhesive layers are provided between the sealing ring 23 and the connecting body, and between the sealing ring 23 and the housing 10, to enhance the sealing and connection between the sealing ring 23 and the connecting body, and to enhance the sealing and connection between the sealing ring 23 and the housing 10, thereby enabling the sealing ring 23 to fully seal the gap between the housing 10 and the connecting body.

[0045] In some embodiments, there is an adhesive between the sealing ring 23 and the surface of the connecting body portion, and there is an adhesive between the sealing ring 23 and the housing 10. When the housing 10 is thermally compressed to form the sealing protrusion 12, the adhesive has an adhesive sealing effect to bond the sealing ring 23 and the connecting body portion, and to bond the sealing ring 23 and the housing 10.

[0046] The adhesive can be PP glue.

[0047] In some embodiments, the sealing ring 23 is made of nitrile rubber (NBR), fluororubber (VITON), chloroprene rubber (CR), butyl rubber (IIR), ethylene propylene diene monomer (EPDM), or other sealing rubber or plastic materials.

[0048] In some embodiments, the thickness of the sealing ring 23 is 3mm-8mm, so that the housing 10 is recessed toward the electrical connection assembly 20 to form a sealing protrusion 12. When the sealing protrusion 12 abuts against the sealing ring 23, the sealing ring 23 can deform, thereby fully sealing the gap between the connection body and the housing 10.

[0049] In some embodiments of this utility model, such as Figure 10 , Figure 11 As shown, the electrical connection assembly 20 includes an electrical connector 21, a support portion 22, and a sealing ring 23. The electrical connector 21 connects two adjacent battery cells 30 in series. The support portion 22 defines a mounting cavity 221. At least a portion of the electrical connector 21 is located in the mounting cavity 221. The sealing ring 23 is sleeved on the support portion 22. The housing 10 is sealed to the sealing ring 23.

[0050] Specifically, the electrical connector 21 and the sealing ring 23 are both disposed on the support portion 22 to form an electrical connection assembly 20. The electrical connector 21 connects two adjacent battery cells 30 in series, and the support portion 22 supports the sealing ring 23, so that the sealing ring 23 can seal the gap between the support portion 22 and the housing 10, thereby achieving an interference seal fit between the electrical connection assembly 20 and the housing 10.

[0051] It should be explained here that the above-mentioned connecting body includes an electrical connector 21 and a support part 22.

[0052] In some embodiments, the material of the support portion 22 is PP, PE, PET, PI or other plastic materials to form an insulating support portion 22.

[0053] In some optional embodiments of this utility model, such as Figure 11As shown, the electrical connector 21 includes two electrical connection portions 211. The portion of each electrical connection portion 211 located inside the mounting cavity 221 is electrically connected to the adjacent electrical connection portion 211 to realize the electrical connection between the two electrical connection portions 211. The portion of each electrical connection portion 211 located outside the mounting cavity 221 is electrically connected to the battery cell 30, so that each electrical connection portion 211 is electrically connected to the corresponding battery cell 30, thereby using the two electrical connection portions 211 to connect two adjacent battery cells 30 in series.

[0054] In some embodiments, such as Figure 11 As shown, the electrical connection portion 211 includes a first portion 2111 and a second portion 2112. The first portion 2111 protrudes from the surface of the second portion 2112 in a first direction, which is the arrangement direction of the battery cells 30. The first portion 2111 extends into the mounting cavity 221, and the second portion 2112 is supported by the support portion 22 and located outside the mounting cavity 221.

[0055] In this configuration, the first part 2111 of each of the two electrical connection parts 211 extends into the mounting cavity 221 and is fixedly connected, while the second part 2112 is electrically connected to the corresponding battery cell 30 to achieve series connection of the two connected battery cells 30.

[0056] In some embodiments, one of the two electrical connection parts 211 is made of aluminum or aluminum alloy and is used to electrically connect to the positive electrode tab of the battery cell 30, and the other of the two electrical connection parts 211 is made of pure copper and is used to electrically connect to the negative electrode tab of another battery cell 30, so that the two electrical connection parts 211 are used to connect two adjacent battery cells 30 in series.

[0057] In some specific embodiments of this utility model, such as Figure 12 As shown, the two electrical connection parts 211 have welding fixing surfaces 212 facing each other. The welding fixing surfaces 212 are provided with exhaust channels 213. The exhaust channels 213 are used to exhaust the hot air generated when welding the two welding fixing surfaces 212, which helps to improve the welding quality of the two electrical connection parts 211.

[0058] In some embodiments, the welding fixing surfaces 212 of the two electrical connection portions 211 facing each other are adapted to be fixed by brazing, thereby realizing the electrical connection of the two electrical connection portions 211, and realizing the series connection of two adjacent battery cells 30 by means of the two electrical connection portions 211.

[0059] In some embodiments, such as Figure 12As shown, the electrical connection portion 211 includes a plurality of first portions 2111 and second portions 2112. The first portions 2111 protrude from the surface of the second portions 2112 in a first direction. The plurality of first portions 2111 are arranged along the length direction of the second portions 2112. The first direction is the arrangement direction of the battery cells 30. The support portion 22 defines a plurality of mounting cavities 221. The first portion 2111 of each electrical connection portion 211 extends into the corresponding mounting cavity 221, and the second portion 2112 is supported outside the mounting cavity 221.

[0060] Each first part 2111 has a welding fixing surface 212 on the side facing away from the second part 2112. The first parts 2111 of the two electrical connection parts 211 are welded and fixed through the welding fixing surface 212 to realize the electrical connection of the two electrical connection parts 211, and then the two electrical connection parts 211 are used to connect two adjacent battery cells 30 in series.

[0061] In some embodiments, when assembling the electrical connection assembly 20, the welding fixing surfaces 212 of the two electrical connection parts 211 are first fixedly connected together, and then the two electrical connection parts 211 are placed in a mold, and the support part 22 is formed by injection molding, so that the first part 2111 of the electrical connection part 211 is embedded in the mounting cavity 221.

[0062] In some examples, the two electrical connections 211 and the support 22 are formed by inlay nano-injection molding.

[0063] In some optional embodiments of this utility model, such as Figure 13 , Figure 14 As shown, the support portion 22 defines an annular limiting groove 222, and the sealing ring 23 is located in the limiting groove 222. The limiting groove 222 is used to limit the position of the sealing ring 23, reducing the possibility that the sealing ring 23 will fall off the support portion 22.

[0064] A portion of the housing 10 defines a sealing protrusion 12, which extends into the limiting groove 222 and contacts the sealing ring 23 to compress the sealing ring 23. The sealing ring 23 is adapted to deform after being compressed by the sealing protrusion 12 so that the sealing ring 23 can fully seal the gap between the housing 10 and the support 22, thereby achieving an interference seal fit between the housing 10 and the electrical connection assembly 20.

[0065] What needs to be explained here is that... Figure 13 (a) is a schematic diagram of the structure of the sealing ring 23 and the support part 22. In this case, the sealing ring 23 is sleeved on the support part 22. Figure 13 (b) is a structural schematic diagram of the support part 22, in which the sealing ring 23 is not provided on the support part 22.

[0066] In some specific embodiments of this utility model, such as Figure 14As shown, the limiting groove 222 includes a limiting bottom wall 223 and an annular limiting peripheral wall 224. The limiting peripheral wall 224 is formed as an inclined surface extending obliquely toward the limiting bottom wall 223. The sealing ring 23 contacts the limiting bottom wall 223 and the limiting peripheral wall 224 respectively, so as to fully seal the gap between the support part 22 and the housing 10 by using the sealing ring 23.

[0067] In some embodiments, the sealing protrusion 12 and the sealing ring 23 partially contact the limiting bottom wall 223 and the limiting peripheral wall 224 to fully seal the gap between the housing 10 and the support 22, thereby enhancing the sealing performance of the housing 10 and the electrical connection assembly 20.

[0068] Specifically, such as Figure 7 , Figure 8 As shown, when the sealing protrusion 12 is not machined on the housing 10, the sealing ring 23 is located in the limiting groove 222, and the width of the sealing ring 23 in the first direction is smaller than the width of the limiting groove 222. When the sealing protrusion 12 is machined on the housing 10, the sealing protrusion 12 squeezes the sealing ring 23, causing the sealing ring 23 to deform. The sealing ring 23 comes into contact with the limiting peripheral wall 224 of the limiting groove 222, thereby increasing the area of ​​the sealing ring 23 sealing the housing 10 and the support 22, and improving the sealing performance of the sealing ring 23 on the support 22 and the housing 10.

[0069] The limiting peripheral wall 224 is formed as an inclined surface extending towards the limiting bottom wall 223, so as to reserve space for the deformation of the sealing ring 23, so that the sealing ring 23 can fit into the limiting peripheral wall 224 after deformation.

[0070] In some embodiments, such as Figure 14 As shown, the groove depth of the limiting groove 222 is a, 0.3mm≤a≤10mm. The groove width of the limiting groove 222 is b1, 10mm≤b1≤30mm. The thickness of the support part 22 is c, 15mm≤c≤40mm.

[0071] In order to match the limiting groove 222, the sealing ring 23 can be stably set in the limiting groove 222. The sealing ring 23 seals the gap between the support part 22 and the sealing protrusion 12. The thickness of the sealing ring 23 is d, 0.5mm≤d≤8mm, and the width of the sealing ring 23 is b2, 8mm≤b2≤18mm.

[0072] The compression rate of the sealing ring 23 after being squeezed by the sealing protrusion 12 is between 10% and 40%, so as to achieve a full seal between the electrical connection assembly 20 and the housing 10, thereby separating independent storage cavities on both sides of the electrical connection assembly 20.

[0073] In some specific embodiments of this utility model, such as Figure 14As shown, the angle between the extension direction of the limiting peripheral wall 224 and the first direction is β, 15°≤β≤60°, and the first direction is the arrangement direction of the adjacent battery cells 30.

[0074] Specifically, if the angle between the limiting peripheral wall 224 and the first direction is too small, the limiting ability of the limiting peripheral wall 224 to limit the sealing ring 23 will be reduced, and the sealing ring 23, which is fitted onto the support portion 22, will easily slip out of the limiting groove 222. Therefore, 15°≤β is required. If the angle between the limiting peripheral wall 224 and the first direction is too large, when the sealing ring 23 is squeezed by the sealing protrusion 12, the sealing ring 23 will easily be restricted by the limiting peripheral wall 224 and will not be able to deform smoothly. Therefore, β≤60° is required so that the sealing ring 23 can deform smoothly after being squeezed by the sealing protrusion 12.

[0075] In some embodiments, such as Figure 18 As shown, the portion of the sealing protrusion 12 corresponding to the limiting peripheral wall 224 is the sealing peripheral wall 121, and the sealing peripheral wall 121 is an inclined surface.

[0076] Specifically, when the sealing protrusion 12 is not machined on the housing 10, the sealing ring 23 is located in the limiting groove 222, and the width of the sealing ring 23 in the first direction is smaller than the width of the limiting groove 222. When the sealing protrusion 12 is machined on the housing 10, the sealing protrusion 12 squeezes the sealing ring 23, causing the sealing ring 23 to deform. The sealing ring 23 deforms between the limiting peripheral wall 224 and the sealing peripheral wall 121, thereby increasing the area of ​​the sealing ring 23 sealing the housing 10 and the support 22, and improving the sealing performance of the sealing ring 23 on the support 22 and the housing 10.

[0077] The angle between the extension direction of the sealing peripheral wall 121 and the first direction is γ, where 10°≤γ≤50°.

[0078] Specifically, if the angle between the extension direction of the sealing peripheral wall 121 and the first direction is too small, the squeezing force of the sealing protrusion 12 on the sealing ring 23 will be insufficient, so 10°≤γ is made. If the angle between the sealing peripheral wall 121 and the first direction is too large, the sealing ring 23 will be unable to deform smoothly due to the restriction of the sealing peripheral wall 121 after being squeezed by the sealing protrusion 12, so β≤50° is made so that the sealing ring 23 can deform smoothly after being squeezed by the sealing protrusion 12.

[0079] In some optional embodiments of this utility model, such as Figure 6 , Figure 7As shown, the battery 1 also includes a spacer 40, which is located between the electrical connector 21 and the cell 30. A portion of the tab 31 of the cell 30 is adapted to pass through the spacer 40 and be sandwiched between the electrical connector 211 and the spacer 40. The spacer 40 is adapted to limit the position of the tab 31 so that the tab 31 can be stably electrically connected to the electrical connector 211, thereby connecting two adjacent cells 30 in series using the two electrical connectors 211.

[0080] Specifically, the tab 31 is adapted to be bent through the spacer ring 40 and then electrically connected to the electrical connection part 211.

[0081] In some embodiments, the portion of the tab 31 that passes through the spacer ring 40 is welded and fixed to the electrical connection portion 211.

[0082] In some specific embodiments of this utility model, such as Figure 9 As shown, one of the support portion 22 and the spacer ring 40 has a snap-fit ​​portion 226, and the other has a snap-fit ​​mating portion 43. The snap-fit ​​mating portion 43 and the snap-fit ​​portion 226 snap-fit ​​together to achieve a quick connection between the support portion 22 and the spacer ring 40, thereby stably clamping part of the tab 31 between the spacer ring 40 and the electrical connection portion 211, and achieving a stable electrical connection between the tab 31 and the electrical connection portion 211.

[0083] In some embodiments, such as Figure 10 As shown, the support part 22 has a connecting arm extending in the first direction, and the end of the connecting arm has a snap-fit ​​part 226, which is a snap-fit ​​protrusion. The spacer 40 has a mating cavity, and a snap-fit ​​mating part 43 is provided on the wall of the mating cavity. The snap-fit ​​mating part 43 is a snap-fit ​​protrusion.

[0084] The connecting arm is adapted to pass through the mating cavity along the first direction, and the snap-fit ​​part 226 snaps into the snap-fit ​​mating part 43 to achieve quick connection between the spacer ring 40 and the support part 22.

[0085] In some specific embodiments of this utility model, such as Figure 6 , Figure 8 As shown, the spacer 40 includes a first spacer portion 41 and a second spacer portion 42 that can be separably fitted along a second direction. The second direction is perpendicular to the arrangement direction of the adjacent cells 30, so as to facilitate the tab 31 to pass through the spacer 40 and to facilitate the positioning of the tab 31.

[0086] Specifically, when assembling the first spacer portion 41 and the second spacer portion 42 together along the second direction, a portion of the tab 31 can be sandwiched between the first spacer portion 41 and the second spacer portion 42, and then the portion of the tab 31 passing through the spacer 40 can be bent to achieve electrical connection between the tab 31 and the electrical connection portion 211.

[0087] In some optional embodiments of this utility model, the electrical connector 21 is electrically connected to the housing 10, so that by detecting the housing 10, the positive and negative voltage information of the series-connected battery cells 30 can be collected, thereby facilitating the monitoring of the health status of the battery cells 30.

[0088] In some embodiments, the battery 1 is used in a vehicle, and the battery management system is electrically connected to the casing 1 of the battery 1 to monitor the health of the cells 30.

[0089] In some specific embodiments of this utility model, such as Figures 15-17 As shown, the battery 1 also includes a fusible fuse 50, which electrically connects the electrical connector 21 and the housing 10. The use of the fuse 50 to electrically connect the electrical connector 21 and the housing 10 enhances the safety of the electrical connection between the housing 10 and the electrical connector 21.

[0090] Specifically, when the battery cell 30 is overloaded or short-circuited, the temperature on the fuse 50 will increase, causing the fuse 50 to melt and break the electrical connection between the electrical connector 21 and the housing 10, thereby improving the safety of the electrical connection between the electrical connector 21 and the housing 10.

[0091] In some embodiments, such as Figure 12 As shown, the electrical connector 21 defines a mating groove 215, and the safety element 50 is mated with the mating groove 215 to enhance the stability of the electrical connection between the electrical connector 21 and the safety element 50.

[0092] In some examples, such as Figure 15 As shown, the electrical connector 21 includes two electrical connection portions 211. The portion of each electrical connection portion 211 located inside the mounting cavity 221 is electrically connected to the adjacent electrical connection portion 211 to realize the electrical connection between the two electrical connection portions 211. The portion of each electrical connection portion 211 located outside the mounting cavity 221 is electrically connected to the battery cell 30, so that each electrical connection portion 211 is electrically connected to the corresponding battery cell 30, thereby using the two electrical connection portions 211 to connect two adjacent battery cells 30 in series.

[0093] Each electrical connection 211 is provided with a mating groove 215. The mating grooves 215 of the two electrical connection parts 211 are combined to define a conical mating groove 215. The end of the safety element 50 is adapted to mate with the conical mating groove 215 so that the safety element 50 is electrically connected to both electrical connection parts 211, thereby improving the stability of the electrical connection between the safety element 50 and the electrical connection 21.

[0094] Furthermore, such as Figure 16 As shown, the longitudinal section of the conical mating groove 215 is V-shaped, with an included angle of θ, where 20°≤θ≤60°.

[0095] Specifically, if the V-angle is too small, it will not be conducive to the insertion and engagement of the end of the fuse 50 and the mating groove 215. If the V-angle is too large, the mating groove 215 will occupy too much space on the electrical connector 21, affecting the current carrying capacity of the electrical connector 21. Therefore, 20°≤θ≤60° is made so that the end of the fuse 50 and the mating groove 215 can be smoothly inserted and engaged, while ensuring the current carrying capacity of the electrical connector 21.

[0096] In some embodiments, such as Figures 15-17 As shown, the safety element 50 includes a conductive ring 51, a fusible safety part 52, and a pre-tightening part 53. The conductive ring 51 defines a movable cavity 513. A portion of the safety part 52 is located within the movable cavity 513. The safety part 52 contacts the electrical connector 21 for electrical connection. The pre-tightening part 53 is located within the movable cavity 513. One end of the pre-tightening part 53 abuts against the wall of the movable cavity 513, and the other end abuts against the safety part 52 to apply a pre-tightening force toward the electrical connector 21 to the safety part 52.

[0097] When the battery cell 30 is overloaded or short-circuited, the temperature of the fuse 52 will increase, causing the fuse 52 to melt and disconnect the electrical connection between the electrical connector 21 and the housing 10, thereby improving the safety of the electrical connection between the electrical connector 21 and the housing 10.

[0098] Specifically, the safety element 52 extends into the movable cavity 513 and contacts the electrical connector 21. The conductive ring 51 electrically connects the safety element 52 and the housing 10, thereby achieving an electrical connection between the housing 10 and the electrical connector 21. The pre-tightening part 53 is provided to ensure that the safety element 52 is held in contact with the electrical connector 21, thereby improving the stability of the electrical connection between the safety element 50 and the housing 10 and the electrical connector 21.

[0099] In some examples, the fuse 52 is made of low-melting-point metals such as lead, antimony, and tin. It has the characteristic of heating up to the melting point after an overcurrent >3A and melting point, and it has the characteristic of not failing when the overcurrent ≤1000mA.

[0100] In some examples, the conductive ring 51 is made of silver, copper, gold, aluminum, zinc, nickel or their alloys or silver- or gold-plated conductive metals to electrically connect the fuse part 52 and the housing 10, thereby realizing the electrical connection between the electrical connector 21 and the housing 10.

[0101] In some examples, such as Figure 17 , Figure 18 As shown, the support part 22 is provided with a plug groove 225, which is connected to the mounting cavity 221. The safety element 50 passes through the housing 10 and the sealing ring 23 and extends into the plug groove 225 to electrically engage with the electrical connector 21, so as to electrically connect the housing 10 and the electrical connector 21 using the safety element 50.

[0102] Both the housing 10 and the sealing ring 23 are provided with clearance holes opposite to the insertion groove 225. The safety part 52 is adapted to pass through the clearance holes on the housing 10 and the sealing ring 23 and extend into the insertion groove 225, and electrically engage with the electrical connector 21 in the mounting cavity 221.

[0103] Specifically, the safety element 50 is inserted into the insertion slot 225 to support the position of the safety element 50 using the support part 22, thereby ensuring a stable electrical connection between the safety element 50 and the electrical connector 21 and improving the stability of the electrical connection between the housing 10 and the electrical connector 21.

[0104] In some specific examples, such as Figure 17 As shown, the battery 1 includes two safety elements 50 located on both sides of the housing 10 in the third direction. Each safety element 50 passes through the housing 10 and the sealing ring 23 in the third direction and extends into the insertion groove 225 to electrically engage with the electrical connector 21, so as to electrically connect the housing 10 and the electrical connector 21 using the two safety elements 50.

[0105] Furthermore, such as Figure 19 As shown, the conductive ring 51 includes a first conductive portion 511 and a second conductive portion 512. The first conductive portion 511 defines a movable cavity 513 and is inserted into the insertion slot 225. The second conductive portion 512 protrudes from the outer periphery of the first conductive portion 511 and is supported outside the housing 10 to limit the position of the conductive ring 51. The second conductive portion 512 is supported outside the housing 10, and the first part 2111 is inserted into the insertion slot 225. At the same time, the conductive ring 51 limits the position of the safety part 52 so that the safety part 52 can extend into the insertion slot 225 and electrically engage with the electrical connector 21 in the mounting cavity 221.

[0106] Specifically, the first conductive part 511 is interference-fitted with the insertion groove 225 to fix the support part 22 and the conductive ring 51, thereby fixing the conductive ring 51 on the support part 22, and at the same time achieving a sealed fit between the conductive ring 51 and the insertion groove 225.

[0107] In some embodiments, the second conductive portion 512 is adapted to be pressed against or welded to the housing 10.

[0108] In some examples, such as Figure 19 , Figure 20 As shown, the conductive ring 51 includes a conductive element 515 and a top plate 516. The conductive element 515 defines an active cavity 513 with an open opening. A safety part 52 extends into the active cavity 513 from the open opening. A pre-tightening part 53 is installed into the active cavity 513 from the open opening. The top plate 516 is adapted to close the open opening of the active cavity 513.

[0109] The preload 53 is a spring. One end of the preload 53 abuts against the top plate 516, and the other end abuts against the safety part 52, so as to apply a preload force away from the top plate 516 to the safety part 52, thereby enabling the safety part 52 to stably engage with the electrical connector 21.

[0110] Specifically, the conductive member 515 defines a portion of the first conductive portion 511 and the second conductive portion 512, and the top plate 516 defines another portion of the second conductive portion 512.

[0111] Furthermore, the top piece 516 is welded or interference-fitted to the conductive element 515 to fix the top piece 516 to the conductive element 515, so that one end of the pre-tightening part 53 can stably abut against the top piece 516.

[0112] In some embodiments, the portion of the safety part 52 located within the movable cavity 513 has a first limiting protrusion 521 protruding from the outer periphery of the safety part 52. The wall of the movable cavity 513 is provided with a second limiting protrusion 514. The first limiting protrusion 521 is adapted to engage with the second limiting protrusion 514 to restrict the movement of the safety part 52 within the movable cavity 513 and prevent the safety part 52 from dislodging from the movable cavity 513.

[0113] In some specific embodiments of this utility model, the two parts of the housing 10 located on both sides of the electrical connection assembly 20 are conductive metal parts of different materials, so as to solve the corrosion problem of the housing 10 under high pressure and improve the corrosion resistance of the housing 10.

[0114] The following describes a battery pack according to an embodiment of the present invention. The battery pack according to an embodiment of the present invention includes a plurality of batteries 1 according to the above embodiments of the present invention.

[0115] The electrical device according to the present invention includes a battery 1 according to the above embodiment of the present invention. By making the electrical connection component 20 and the housing 10 interference-sealed, the housing 10 is divided into multiple independent holding cavities. Multiple battery cells 30 are arranged in the multiple holding cavities one by one. A battery 1 with a large voltage can be formed by using a housing 10, which facilitates the utilization rate of the internal space of the battery 1 and increases the capacity of the battery 1.

[0116] In some embodiments, the battery pack includes a battery pack housing, and a plurality of batteries 1 are arranged inside the battery pack housing. The plurality of batteries 1 may be connected in series or in parallel, without further restrictions.

[0117] In some embodiments, the battery pack includes a power distribution component electrically connected to the battery 1. The power distribution component is used to distribute the high-voltage power of the battery pack, ensure precise control of the charging and discharging process of the battery pack, and monitor and protect the high-voltage system in the battery pack from potential risks such as overload and short circuit.

[0118] The following describes an electrical device according to an embodiment of the present invention. The electrical device according to an embodiment of the present invention includes a battery 1 according to the above embodiments of the present invention, or includes a battery pack according to the above embodiments of the present invention.

[0119] The electrical devices mentioned here can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0120] Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; spacecraft can include airplanes, rockets, space shuttles, and spacecraft; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0121] In some embodiments, the electrical device is a vehicle, which may be a pure electric vehicle or a hybrid vehicle.

[0122] The electrical device according to the present invention includes a battery 1 or battery pack according to the above embodiments of the present invention. By making the electrical connection component 20 and the housing 10 interference-sealed, the housing 10 is divided into multiple independent holding cavities. Multiple battery cells 30 are arranged one-to-one in the multiple holding cavities. A battery 1 with a large voltage can be formed by using a housing 10, which facilitates the utilization rate of the internal space of the battery 1 and increases the capacity of the battery 1.

[0123] Other components and operations of the electrical device according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0124] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 this utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, "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.

[0125] In the description of this utility model, 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 indicate that the first feature is at a higher horizontal level than the second feature.

[0126] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0127] 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 present 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.

[0128] Although embodiments of the present 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 present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery, characterized in that, include: Shell (10); At least one electrical connection assembly (20), each of the electrical connection assemblies (20) being disposed within the housing (10), each of the electrical connection assemblies (20) being interference-fitted and sealingly fitted with the housing (10) to separate independent storage cavities on both sides of the electrical connection assembly (20); Multiple battery cells (30), each of the battery cells (30) is disposed in the holding cavity, and two adjacent battery cells (30) are connected in series through the electrical connection assembly (20).

2. The battery according to claim 1, characterized in that, A portion of the housing (10) is recessed toward the electrical connection assembly (20) to form a sealing protrusion (12), which contacts the electrical connection assembly (20) for an interference fit; And / or, the electrical connection assembly (20) includes a connection body and a sealing ring (23), the sealing ring (23) being fitted over the connection body and in contact with the housing (10).

3. The battery according to claim 1 or 2, characterized in that, The electrical connection assembly (20) includes: Electrical connector (21), wherein the electrical connector (21) is connected in series with two adjacent battery cells (30); A support (22) defines a mounting cavity (221) in which at least a portion of the electrical connector (21) is located. A sealing ring (23) is fitted over the support portion (22), and the housing (10) is sealed to the sealing ring (23).

4. The battery according to claim 3, characterized in that, The electrical connector (21) includes two electrical connection portions (211), the portion of each electrical connection portion (211) located inside the mounting cavity (221) is electrically connected to the adjacent electrical connection portion (211), and the portion of each electrical connection portion (211) located outside the mounting cavity (221) is electrically connected to the battery cell (30). The two electrical connection portions (211) have welding fixing surfaces (212) facing each other, and the welding fixing surfaces (212) are provided with exhaust channels (213).

5. The battery according to claim 3, characterized in that, The support (22) defines an annular limiting groove (222), the sealing ring (23) is located in the limiting groove (222), and a portion of the housing (10) defines a sealing protrusion (12), the sealing protrusion (12) extends into the limiting groove (222) and contacts the sealing ring (23).

6. The battery according to claim 5, characterized in that, The limiting groove (222) includes a limiting bottom wall (223) and an annular limiting peripheral wall (224). The limiting peripheral wall (224) is formed as an inclined surface extending obliquely toward the limiting bottom wall (223). The sealing ring (23) contacts the limiting bottom wall (223) and the limiting peripheral wall (224) respectively. The sealing protrusion (12) contacts the portion of the sealing ring (23) located on the limiting bottom wall (223) and the limiting peripheral wall (224).

7. The battery according to claim 5, characterized in that, The angle between the extension direction of the limiting peripheral wall (224) and the first direction is β, 15°≤β≤60°, and the first direction is the arrangement direction of the adjacent battery cells (30); And / or, the portion of the sealing protrusion (12) corresponding to the limiting peripheral wall (224) is the sealing peripheral wall (121), the sealing peripheral wall (121) is an inclined surface, and the angle between the extension direction of the sealing peripheral wall (121) and the first direction is γ, 10°≤γ≤50°.

8. The battery according to claim 3, characterized in that, It also includes a spacer (40) located between the electrical connector (21) and the battery cell (30), wherein a portion of the tab (31) of the battery cell (30) is adapted to pass through the spacer (40) and is clamped between the electrical connector (211) and the spacer (40).

9. The battery according to claim 8, characterized in that, One of the support (22) and the spacer (40) has a snap-fit ​​portion (226), and the other has a snap-fit ​​engagement portion (43) that snaps into the snap-fit ​​portion (226). And / or, the spacer (40) includes a first spacer portion (41) and a second spacer portion (42) that can be separably engaged along a second direction, the second direction being perpendicular to the arrangement direction of the adjacent cells (30).

10. The battery according to any one of claims 3-9, characterized in that, Also includes: A fusible fuse (50) electrically connects the electrical connector (21) and the housing (10).

11. The battery according to claim 10, characterized in that, The insurance policy (50) includes: A conductive ring (51) defines a movable cavity (513); A fusible fuse (52), a portion of which is located within the movable cavity (513), is in contact with the electrical connector (21) for electrical connection; Pre-tightening part (53) is located in the movable cavity (513). One end of the pre-tightening part (53) abuts against the wall of the movable cavity (513), and the other end abuts against the safety part (52) to apply a pre-tightening force toward the electrical connector (21) to the safety part (52).

12. The battery according to claim 11, characterized in that, The support part (22) is provided with a plug groove (225), which is connected to the mounting cavity (221). The safety member (50) passes through the housing (10) and the sealing ring (23) and extends into the plug groove (225) to electrically engage with the electrical connector (21).

13. The battery according to claim 10, characterized in that, The two parts of the housing (10) located on both sides of the electrical connection assembly (20) are conductive metal parts made of different materials.

14. A battery pack, characterized in that, It includes multiple batteries, wherein the batteries are any one of claims 1-13.

15. An electrical appliance, characterized in that, It includes the battery according to any one of claims 1-13; or it includes the battery pack according to claim 14.

Images