Cover plate assembly, battery assembly, battery pack and electric device

Abstract

The utility model discloses a kind of cover plate assembly, battery assembly, battery pack and electric device, cover plate assembly is suitable for the electric core assembly in the two battery monomers of adjacent series, cover plate assembly includes first cover plate and second cover plate, electrical connection part and anti-rotation piece, first cover plate and second cover plate are arranged in first direction, the side wall of first cover plate and second cover plate towards each other is equipped with first anti-rotation structure, electrical connection part is worn in first cover plate and second cover plate, two ends of electrical connection part are respectively electrically connected with two adjacent electric core assemblies, anti-rotation piece is insulating material piece and anti-rotation piece is equipped between first cover plate and second cover plate to fixedly connect first cover plate and second cover plate, anti-rotation piece defines second anti-rotation structure matched with first anti-rotation structure.The cover plate assembly of the utility model embodiment, by directly setting second anti-rotation structure matched with first anti-rotation structure on anti-rotation piece, the number of cover plate assembly and assembly complexity can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cover plate assembly, a battery assembly, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, batteries require multiple cells to be connected in series using a cover plate assembly to increase the total battery voltage. However, the cover plates of adjacent cells are prone to relative rotation. To solve this problem, existing technologies place an insulating component between the two cover plates and an anti-rotation component between the cover plate and the insulating component to prevent relative rotation between the insulating component and the cover plate. This results in a complex cover plate assembly structure and high production costs. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the first objective of this utility model is to provide a cover plate assembly that, by directly incorporating a second anti-rotation structure that cooperates with a first anti-rotation structure onto the anti-rotation component, reduces the number of structures and assembly complexity of the cover plate assembly, lowers the cost of the cover plate assembly, and solves the technical problem of the large number of structures and complex assembly in existing cover plate assemblies.

[0004] The second objective of this invention is to provide a battery assembly having the aforementioned cover plate assembly.

[0005] The third objective of this invention is to provide a battery pack having the aforementioned battery components.

[0006] The fourth objective of this utility model is to provide an electrical device having the aforementioned battery pack.

[0007] According to an embodiment of the present invention, a cover plate assembly is adapted to connect two adjacent battery cells in series. The cover plate assembly includes: a first cover plate and a second cover plate, the first cover plate and the second cover plate being arranged in a first direction, and the sidewalls of the first cover plate and the second cover plate facing each other having a first anti-rotation structure; an electrical connection portion, the electrical connection portion passing through the first cover plate and the second cover plate in the first direction, the two ends of the electrical connection portion being electrically connected to two adjacent battery cells; and an anti-rotation member, the anti-rotation member being an insulating material and disposed between the first cover plate and the second cover plate to fix the first cover plate and the second cover plate, the anti-rotation member defining a second anti-rotation structure that cooperates with the first anti-rotation structure.

[0008] According to the embodiment of the present invention, the cover plate assembly has a first anti-rotation structure on the sidewalls of the first cover plate and the second cover plate facing each other. The anti-rotation member is made of insulating material and is disposed between the first cover plate and the second cover plate to fix the first cover plate and the second cover plate, so that the first cover plate, the second cover plate and the anti-rotation member become an integral part. This not only simplifies the structure of the cover plate assembly, but also ensures the sealing between the cover plate assembly and adjacent battery cells to a certain extent. Furthermore, by defining a second anti-rotation structure that cooperates with the first anti-rotation structure through the anti-rotation member, the cooperation between the first anti-rotation structure and the second anti-rotation structure ensures a certain degree of relative stability between the first cover plate and the second cover plate, further ensuring the structural stability between the cover plate assembly and adjacent battery cells, thereby ensuring the working performance of the battery cells and the working performance of the battery assembly. In addition, the integral part formed by the first cover plate, the second cover plate and the anti-rotation member can realize the series connection of multiple battery cell assemblies, which can greatly improve the capacity and voltage of the battery assembly, while also saving the cost of the cover plate assembly and improving the space utilization of the battery cells to a certain extent.

[0009] In some embodiments, a filling space is defined between the first cover plate and the second cover plate, and the anti-rotation component is an injection-molded material part to fill the filling space and fix the first cover plate and the second cover plate together.

[0010] In some embodiments, the first anti-rotation structure is an anti-rotation groove, and a portion of the anti-rotation member fills the anti-rotation groove to form an anti-rotation protrusion, the anti-rotation protrusion defining the second anti-rotation structure; or, the first anti-rotation structure is an anti-rotation protrusion, and the anti-rotation member wraps around the anti-rotation protrusion to form an anti-rotation groove that mates with the anti-rotation protrusion, the anti-rotation groove defining the second anti-rotation structure.

[0011] In some embodiments, the anti-rotation protrusion includes a first portion and a second portion with different cross-sectional areas, wherein the cross-sectional area of ​​the second portion is larger than that of the first portion, and the second portion protrudes from the end of the first portion.

[0012] In some embodiments, the shape of the anti-rotation protrusion projected in the first direction is non-circular, and the shape of the anti-rotation groove projected in the first direction is non-circular.

[0013] In some embodiments, the anti-rotation groove includes a branch cavity communicating with the main cavity, and the anti-rotation protrusion includes a main body and a branch protrusion protruding from the main body, wherein the main body fills the main cavity and the branch protrusion is located within the branch cavity.

[0014] In some embodiments, the main body extends along a second direction, and the branch protrusions are multiple and intersect with the main body.

[0015] In some embodiments, the anti-rotation member covers the electrical connection portion to define a first through hole that mates with the electrical connection portion.

[0016] In some embodiments, both the first cover plate and the second cover plate are provided with a second through hole that mates with the electrical connection portion; a first insulating element is provided between the electrical connection portion and the second through hole.

[0017] In some embodiments, each of the first cover plate and the second cover plate has a receiving recess on the side opposite to the anti-rotation member, the receiving recess extending circumferentially along the second through hole, the first insulating member including a first sealing portion and a second sealing portion connected to each other, the first sealing portion cooperating with the receiving recess, and the second sealing portion extending into the second through hole to separate the electrical connection portion and the second through hole.

[0018] In some embodiments, the first cover plate and the second cover plate have protrusions on their sidewalls facing each other, the protrusions penetrating the second through hole, and the protrusions of the first cover plate and the second cover plate engaging with each other.

[0019] In some embodiments, the cover plate assembly further includes lead-out members, which are provided on the side of the first cover plate and the second cover plate opposite to each other, and the lead-out members are electrically connected to the cell assembly and the electrical connection portion, respectively.

[0020] In some embodiments, a second insulating member is provided between the lead-out member and the first cover plate, and between the lead-out member and the second cover plate, and the electrical connection portion passes through the second insulating member and is electrically connected to the lead-out member.

[0021] In some embodiments, one of the lead-out member and the second insulating member has a connecting protrusion, and the other has a connecting hole that mates with the connecting protrusion.

[0022] In some embodiments, the electrical connection portion includes a body portion and a mating portion protruding from the body portion, the second insulating member is provided with a third through hole, the body portion passes through the third through hole and is electrically connected to the lead-out member, and the second insulating member is sandwiched between the mating portion and the lead-out member.

[0023] In some embodiments, the electrical connection portion is welded to the lead-out member.

[0024] In some embodiments, one of the lead-out member and the electrical connection portion has a positioning groove, and the other has a positioning protrusion that mates with the positioning groove.

[0025] A battery assembly according to an embodiment of the present invention includes: a plurality of battery cells arranged along a first direction, each battery cell including a cell assembly; and a cover plate assembly, wherein two adjacent cell assemblies are connected in series via the cover plate assembly, the cover plate assembly being the aforementioned cover plate assembly.

[0026] According to the embodiments of the present invention, the battery assembly can improve its working performance to a certain extent by using the aforementioned cover plate assembly.

[0027] In some embodiments, the two ends of the electrical connection portion are respectively fixedly connected to two adjacent battery cell assemblies.

[0028] In some embodiments, each of the battery cells includes a housing defining an end-open receiving cavity, the cell assembly being disposed within the receiving cavity, and a first cover and a second cover respectively sealing the openings of adjacent housings.

[0029] The battery pack according to an embodiment of the present invention includes the aforementioned battery assembly.

[0030] According to the embodiments of the present invention, the battery pack can improve its working performance to a certain extent by using the aforementioned battery components.

[0031] The electrical device according to an embodiment of the present invention includes the aforementioned battery pack.

[0032] According to the embodiments of the present invention, the electrical device can improve its working performance to a certain extent by using the aforementioned battery pack.

[0033] Additional aspects and advantages of this invention will become apparent from the description which follows, or may be learned by practice of this invention. Attached Figure Description

[0034] 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:

[0035] Figure 1 This is an exploded view of a battery assembly according to some embodiments of the present invention;

[0036] Figure 2 This is an exploded view of the cover plate assembly of some embodiments of the present invention;

[0037] Figure 3 This is a schematic diagram of the anti-rotation component according to some embodiments of the present invention;

[0038] Figure 4 This is a schematic diagram of the anti-rotation component and the second cover plate according to some embodiments of the present invention;

[0039] Figure 5 for Figure 4 A sectional view along line AA.

[0040] Figure 6 for Figure 5 A magnified view of region I in the middle;

[0041] Figure 7 This is a schematic diagram of the cover plate assembly of some embodiments of the present invention with some parts of the structure omitted;

[0042] Figure 8 for Figure 7 Sectional view along line BB;

[0043] Figure 9 for Figure 8 Enlarged view of region II.

[0044] Figure label:

[0045] 2000, Battery Components;

[0046] 1000, Cover plate assembly;

[0047] 100. First cover plate; 110. Second through hole; 120. Receiving recess;

[0048] 200. Second cover plate; 210. Boss portion;

[0049] 300. Electrical connection part;

[0050] 310. Body part; 320. Fitting part; 330. Positioning convex part;

[0051] 400. Anti-rotation component;

[0052] 410. First anti-rotation structure; 411. Main cavity; 412. Branch cavity;

[0053] 420. Second anti-rotation structure;

[0054] 421. Part One; 422. Part Two; 423. Main Body;

[0055] 424. Branch protrusion;

[0056] 430. First through hole;

[0057] 500. First insulating component;

[0058] 600, Lead-out part; 610, Connecting hole; 620, Positioning groove;

[0059] 700, Second insulating component; 710, Connecting protrusion; 720, Third through hole;

[0060] 1100, battery cell; 1110, casing; 1111, opening. Detailed Implementation

[0061] 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.

[0062] 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", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0063] Currently, adjacent battery cell modules are connected in series through cover plate modules. The series connection of multiple battery cell modules increases the power of the battery module. At the same time, the relative stability relationship between the components of the cover plate module directly affects the structural stability of adjacent battery cells.

[0064] In addition, existing technologies connect multiple battery cell assemblies in series through cover plate assemblies. Some existing technologies set an insulating element between two cover plates and an anti-rotation element between the cover plate and the insulating element to prevent relative rotation between the insulating element and the cover plate. This results in a more complex structure of the cover plate assembly, higher production costs, and poor sealing between the insulating element and the first and second cover plates, respectively.

[0065] Other existing technologies only include a first cover plate, a second cover plate, and an electrical connection part. Although the cover plate assembly has a simple structure, the lack of lead-out parts makes it very difficult to weld the tabs on the cell assembly, which may affect the poor shape of the tabs after welding, resulting in poor working performance of the tabs.

[0066] The cover plate assembly 1000 of this utility model is described below with reference to the accompanying drawings.

[0067] Combination Figures 1-4As shown, a cover plate assembly 1000 according to an embodiment of the present invention is adapted to connect the cell assemblies (not shown) within two adjacent battery cells 1100 in series. The cover plate assembly 1000 includes: a first cover plate 100, a second cover plate 200, an electrical connection portion 300, and an anti-rotation member 400. By connecting the cell assemblies within two adjacent battery cells 1100 in series using the cover plate assembly 1000, the total voltage of the multiple battery cells 1100 can be increased to a certain extent, meeting the power demand of the electrical device and ensuring the normal operation of the electrical device.

[0068] Among them, such as Figure 2 As shown, the first cover plate 100 and the second cover plate 200 are arranged in the first direction.

[0069] It should be noted that the first direction mentioned here can be understood as... Figure 2 As shown in the X direction, the first cover plate 100 and the second cover plate 200 are arranged along the X direction so that the first cover plate 100 can be connected to the battery cell 1100 located on one side of the X direction, and the second cover plate 200 can be connected to the battery cell 1100 located on the other side of the X direction, thereby realizing the connection of adjacent battery cells 1100 by using the cover plate assembly 1000.

[0070] The electrical connection portion 300 passes through the first cover plate 100 and the second cover plate 200 in the first direction. The two ends of the electrical connection portion 300 are electrically connected to two adjacent cell assemblies, thereby enabling series connection between adjacent battery cells 1100.

[0071] Specifically, one end of the electrical connection 300 is connected to the positive terminal of the cell assembly of a battery cell 1100, and the other end of the electrical connection 300 is connected to the negative terminal of the cell assembly of another battery cell 1100, so that the current of one cell assembly between two adjacent cell assemblies can be transferred to the other cell assembly through the electrical connection 300, thereby realizing the current flow between the two cell assemblies of adjacent cells, which can increase the power of the battery assembly 2000 to a certain extent.

[0072] It is worth noting that by passing the electrical connection portion 300 through the first cover plate 100 and the second cover plate 200 in the first direction, and by electrically connecting the two ends of the electrical connection portion 300 to two adjacent cell components respectively, it is possible to achieve series connection between adjacent cell components, that is, current can be transferred between adjacent cell components, thereby greatly increasing the voltage of the battery component 2000.

[0073] The first cover plate 100 and the second cover plate 200 are provided with a first anti-rotation structure 410 on their sidewalls facing each other. The anti-rotation member 400 is made of insulating material and is disposed between the first cover plate 100 and the second cover plate 200 to fix the first cover plate 100 and the second cover plate 200. The anti-rotation member 400 defines a second anti-rotation structure 420 that cooperates with the first anti-rotation structure 410. In this way, by making the anti-rotation member 400 an insulating material and fixing the first cover plate 100 and the second cover plate 200 with the anti-rotation member 400, the anti-rotation member 400 and the first cover plate 100 are fixedly connected and the second cover plate 200 is fixedly connected and the anti-rotation member 400 is fixedly connected and the anti-rotation member 400, so that the anti-rotation member 400, the first cover plate 100 and the second cover plate 200 become an integral structure.

[0074] Meanwhile, by defining a second anti-rotation structure 420 that cooperates with the first anti-rotation structure 410 through the anti-rotation component 400, the cooperation between the first anti-rotation structure 410 and the second anti-rotation structure 420 ensures a certain degree of relative stability between the first cover plate 100 and the anti-rotation component 400, and between the second cover plate 200 and the anti-rotation component 400. This further ensures the stability of the connection between the cover plate assembly 1000 and the adjacent battery cell 1100, thereby ensuring the working performance of the battery cell 1100 and thus ensuring the working performance of the battery assembly 2000.

[0075] As can be seen from the above structure, the cover plate assembly 1000 of this utility model, by making the anti-rotation member 400 an insulating material and placing the anti-rotation member 400 between the first cover plate 100 and the second cover plate 200 to fix the first cover plate 100 and the second cover plate 200, makes the anti-rotation member 400, the first cover plate 100 and the second cover plate 200 a whole structure. Furthermore, by defining a second anti-rotation structure 420 that cooperates with the first anti-rotation structure 410 through the anti-rotation member 400, the cooperation between the first anti-rotation structure 410 and the second anti-rotation structure 420 ensures a certain relative stability between the first cover plate 100 and the anti-rotation member 400, and between the second cover plate 200 and the anti-rotation member 400, thereby ensuring the stability of the connection between the cover plate assembly 1000 and the adjacent battery cell 1100.

[0076] Furthermore, by having the electrical connection portion 300 pass through the first cover plate 100 and the second cover plate 200 in the first direction, and having both ends of the electrical connection portion 300 electrically connected to two adjacent cell assemblies respectively, it is possible to achieve series connection between adjacent battery cells 1100, which can greatly improve the voltage of the battery assembly 2000 and, to a certain extent, also improve the space utilization of the battery cells 1100.

[0077] It is understandable that, compared to the prior art, this application defines a second anti-rotation structure 420 that cooperates with the first anti-rotation structure 410 by defining the anti-rotation component 400. Through the cooperation of the first anti-rotation structure 410 and the second anti-rotation structure 420, a certain degree of relative stability can be ensured between the first cover plate 100 and the anti-rotation component 400, and between the second cover plate 200 and the anti-rotation component 400, thereby ensuring the stability of the connection between the cover plate assembly 1000 and the adjacent battery cell 1100. Compared to having the cover plate assembly 1000 have both the anti-rotation component 400 and the second anti-rotation structure 420, this embodiment simplifies the number of structures and the assembly load of the cover plate assembly 1000, and can save the cost of the cover plate assembly 1000.

[0078] In some embodiments, the first cover plate 100 and the second cover plate 200 are made of aluminum alloy. Because aluminum alloy has a certain structural strength, it can ensure that the first cover plate 100 and the second cover plate 200 also have a certain structural strength, so that the first cover plate 100 and the second cover plate 200 can provide stable support for multiple adjacent battery cell components. At the same time, the use of aluminum alloy can also significantly reduce the weight of the cover plate component 1000, which meets the requirements of lightweighting of existing structural components.

[0079] In a specific example, the electrical connection part 300 is a copper-aluminum composite pole.

[0080] In some embodiments, the tabs of the battery cell assembly are located at the ends of the battery cell assembly in a first direction. The tabs serve as channels for current to enter and exit the battery cell assembly, enabling the current generated by the internal chemical reaction of adjacent battery cell assemblies to be conducted to the external circuit to power the electrical device. At the same time, during the charging process of the battery assembly 2000, the tabs can introduce the current from the external power source into the battery cell assembly, enabling the battery cell assembly to store electrical energy.

[0081] In some embodiments, a filling space is defined between the first cover plate 100 and the second cover plate 200, and the anti-rotation component 400 is an injection-molded material part to fill the filling space and fix the first cover plate 100 and the second cover plate 200. This connection and fixation between the anti-rotation component 400 and the first cover plate 100, and between the second cover plate 200 and the anti-rotation component 400, makes the anti-rotation component 400, the first cover plate 100, and the second cover plate 200 a single integral structure.

[0082] In addition, a filling space is defined between the first cover plate 100 and the second cover plate 200, which can provide a space for the anti-rotation component 400, thereby reducing the installation difficulty of the anti-rotation component 400 to a certain extent.

[0083] In some embodiments, the anti-rotation component 400 is a colloid of a flowable insulating material such as polyamide, polycarbonate, polystyrene, phenolic resin, or silicone rubber.

[0084] In a specific example, after the first cover plate 100 and the second cover plate 200 are placed in a specific mold, an adhesive of insulating material such as polyamide, polycarbonate, polystyrene, phenolic resin or silicone rubber is injected and filled into the filling space defined by the first cover plate 100 and the second cover plate 200. After the adhesive solidifies, an anti-rotation component 400 is formed. The anti-rotation component 400 can respectively connect and fix the first cover plate 100 and the second cover plate 200, so that the anti-rotation component 400 is fixedly connected to the first cover plate 100 and the second cover plate 200 and forms an integral structure.

[0085] In some embodiments, combined with Figures 2-6 As shown, the first anti-rotation structure 410 is an anti-rotation groove, and a portion of the anti-rotation component 400 is filled in the anti-rotation groove to form an anti-rotation protrusion. The anti-rotation protrusion defines the second anti-rotation structure 420. This makes the formation of the anti-rotation protrusion simpler and facilitates the formation of anti-rotation protrusions with complex shapes according to requirements, thereby simplifying the structure and reducing costs.

[0086] It should be noted that after the anti-rotation component 400 is made of injection molded material and fills the filling space between the first cover plate 100 and the second cover plate 200, the solidified injection molded material forms an integrally molded anti-rotation component 400 and anti-rotation protrusion.

[0087] Furthermore, by filling a portion of the anti-rotation component 400 into the anti-rotation groove to form an anti-rotation protrusion, the shape and size of the anti-rotation groove and the anti-rotation protrusion are matched, providing accurate positioning for the first anti-rotation structure 410 and the second anti-rotation structure 420. To a certain extent, this ensures that the first anti-rotation structure 410 and the second anti-rotation structure 420 maintain a precise relative position after assembly, thereby ensuring a precise relative position between the first cover plate 100 and the anti-rotation component 400, as well as between the second cover plate and the anti-rotation component 400. This helps improve the accuracy and stability of the anti-rotation component 400 fixedly connected to the first cover plate 100 and the second cover plate 200 to form an integral structure, and further reduces the assembly error when the entire anti-rotation component 400 is fixedly connected to the first cover plate 100 and the second cover plate 200.

[0088] It should be noted that by tightly fitting the anti-rotation groove and the anti-rotation protrusion, the anti-rotation component 400 is fixedly connected to the first cover plate 100 and the second cover plate 200 respectively, forming a sealed structure. To a certain extent, this ensures the sealing between the anti-rotation component 400 and the first cover plate 100 and the second cover plate 200, thereby preventing external substances from interfering with the connection between the anti-rotation component 400 and the first cover plate 100, and preventing external substances from interfering with the connection between the anti-rotation component 400 and the second cover plate 200, thus ensuring the stability of the connection between the anti-rotation component 400 and the first cover plate 100, and ensuring the stability of the connection between the anti-rotation component 400 and the second cover plate 200.

[0089] In a specific example, a limiting groove is provided on the first cover plate 100 and the second cover plate 200. After the first cover plate 100 and the second cover plate 200 are placed in a specific mold, the colloid of the insulating material is injected and filled into the limiting groove defined by the first cover plate 100 and the second cover plate 200. After the colloid solidifies, an anti-rotation protrusion and an anti-rotation component 400 that match the limiting groove are formed, so that the anti-rotation component 400 is fixedly connected to the first cover plate 100 and the second cover plate 200 respectively and forms an integral structure.

[0090] In some embodiments, the first anti-rotation structure 410 is an anti-rotation protrusion, and the anti-rotation member 400 wraps around the anti-rotation protrusion to form an anti-rotation groove that mates with the anti-rotation protrusion. The anti-rotation groove defines the second anti-rotation structure 420, which makes the formation of the anti-rotation groove simpler and facilitates the formation of complex-shaped anti-rotation grooves on the anti-rotation member 400 as needed, thereby reducing costs.

[0091] Specifically, the limiting groove is provided on the anti-rotation component 400. That is, the first cover plate 100 and the second cover plate 200 are first provided with anti-rotation protrusions. After the first cover plate 100 and the second cover plate 200 with anti-rotation protrusions are placed in a specific mold, the colloid of the insulating material is injected and filled into the filling space defined by the first cover plate 100 and the second cover plate 200. After the colloid solidifies, an anti-rotation groove matching the limiting protrusion and the anti-rotation component 400 are formed, so that the anti-rotation component 400 is fixedly connected to the first cover plate 100 and the second cover plate 200 respectively and forms an integral structure.

[0092] In some embodiments, combined with Figure 7 , Figure 8 and Figure 9 As shown, the anti-rotation protrusion includes a first portion 421 and a second portion 422 with different cross-sectional areas. The cross-sectional area of ​​the second portion 422 is larger than that of the first portion 421, and the second portion 422 protrudes from the end of the first portion 421. This ensures that the anti-rotation protrusion... Figure 8 The X direction shown provides stronger constraints, which can prevent the first part 421 and the second part 422 from coming out of the corresponding anti-rotation grooves to a certain extent, thereby ensuring the stability of the connection and fixation between the anti-rotation member 400 and the first cover plate 100, the anti-rotation member 400 and the second cover plate 200, and at the same time, the anti-rotation member 400 is used to realize the fixed connection between the first cover plate 100 and the second cover plate 200.

[0093] Specifically, when the cover plate assembly 1000 and the adjacent battery cell 1100 are subjected to external forces such as tension or vibration in the X direction, the anti-rotation groove can lock the anti-rotation protrusion, so that the anti-rotation component 400 and the first cover plate 100, the anti-rotation component 400 and the second cover plate 200 are tightly connected, avoiding shaking or displacement between the first cover plate 100 and the anti-rotation component 400, and between the second cover plate 200 and the anti-rotation component 400. This can prevent relative rotation between the first cover plate 100 and the second cover plate 200, thereby ensuring the working stability of the first cover plate 100 and the second cover plate 200, ensuring the working stability of the cover plate assembly 1000, and thus ensuring the working stability of the battery assembly 2000.

[0094] In some embodiments, in the X direction, the first portion 421 is located between the anti-rotation member 400 and the second portion 422, and in the width direction of the first portion 421, the second portion 422 protrudes from both ends of the first portion 421.

[0095] In some examples, such as Figure 9 As shown, in the first direction, anti-rotation protrusions are provided on both sides of the anti-rotation component 400 to cooperate with the anti-rotation grooves on the first cover plate 100 and the second cover plate 200, respectively.

[0096] In other embodiments, in the X direction, the first portion 421 is located between the anti-rotation member 400 and the second portion 422, and the second portion 421 protrudes in the length direction of the first portion 422.

[0097] In some embodiments, in the X direction, the first portion 421 is located between the anti-rotation member 400 and the second portion 422. The anti-rotation groove includes a first groove and a second groove with different cross-sectional areas. The first groove mates with the first portion 421, and the second groove mates with the second portion 422. The cross-sectional area of ​​the second groove is larger than that of the first groove, and the opening of the first groove is smaller than that of the second groove. That is, the cross-sectional dimension of the second portion 422 is larger than that of the opening of the first groove to prevent the second portion 422 from entering the first groove, so that the anti-rotation groove is positioned such that... Figure 8 The X direction shown provides stronger constraints to prevent the first part 421 and the second part 422 from coming out of their respective first and second grooves, thereby ensuring the stability of the connection and fixation between the anti-rotation member 400 and the first cover plate 100, the anti-rotation member 400 and the second cover plate 200, and further using the anti-rotation member 400 to achieve the fixed connection between the first cover plate 100 and the second cover plate 200.

[0098] In other embodiments, the anti-rotation protrusion includes a plurality of first portions 421 and a plurality of second portions 422, wherein the cross-sectional area of ​​the second portions 422 is larger than the cross-sectional area of ​​the first portions 421, and the plurality of first portions 421 and the plurality of second portions 422 are arranged in the X direction.

[0099] In specific examples, such as Figure 9 As shown, the anti-rotation protrusion and anti-rotation groove combine to form a "T"-shaped snap-fit ​​structure, which can reinforce and seal the anti-rotation component 400 and the first cover plate 100, as well as the anti-rotation component 400 and the second cover plate 200. This ensures the working performance of the anti-rotation component 400 fixedly connected to the first cover plate 100 and the second cover plate 200 to form an integral structure. At the same time, it can effectively prevent the anti-rotation component 400 from separating from the first cover plate 100 or the second cover plate 200 along the normal direction of the contact surface. Here, the normal direction can be understood as... Figure 2 The X direction shown in the figure can ensure the stability of the connection structure between the anti-rotation component 400 and the first cover plate 100, and between the anti-rotation component 400 and the second cover plate 200.

[0100] In some embodiments, the shape of the anti-rotation protrusion projected in the first direction is non-circular, and the shape of the anti-rotation groove projected in the first direction is non-circular. In this way, when the anti-rotation protrusion and the anti-rotation groove cooperate, the possibility of rotation between the anti-rotation member 400 and the first cover plate 100, and between the anti-rotation member 400 and the second cover plate 200 can be reduced.

[0101] In some embodiments, combined with Figure 3 and Figure 4 As shown, the anti-rotation groove includes a main cavity 411 and a branch cavity 412 communicating with the main cavity 411. The anti-rotation protrusion includes a main body 423 and a branch protrusion 424 protruding from the main body 423. The main body 423 fills the main cavity 411, and the branch protrusion 424 is located in the branch cavity 412. By setting a main cavity 411 and a branch cavity 412 communicating with the main cavity 411, the area of ​​the anti-rotation groove is increased. Furthermore, by setting a main body part 423 and a branch protrusion 424 respectively formed with the main cavity 411 and the branch cavity 412, the area of ​​the anti-rotation protrusion is increased. Through the limiting cooperation of the large-area main body part 423 and the main cavity 411, as well as the branch protrusion 424 and the branch cavity 412, the connection stability between the anti-rotation groove and the anti-rotation protrusion can be improved. This can improve the stability of the anti-rotation component 400 fixedly connected with the first cover plate 100 and the second cover plate 200 to form an integral structure, preventing the first cover plate 100 and the second cover plate 200 from shaking or rotating relative to each other when subjected to external impact, thus ensuring the working stability of the cover plate assembly 1000.

[0102] In a specific example, the anti-rotation groove and the anti-rotation boss have an open triangular shape that matches each other, and the first through hole 430 ( Figure 2 The components shown in the figure are symmetrically distributed around the center, which gives the anti-rotation component 400 a certain degree of stability. To a certain extent, it can prevent the anti-rotation component 400 from rotating relative to the first cover plate 100 and the second cover plate 200 in the contact plane, thereby increasing the upper limit of the load-bearing capacity of the overall structure formed by the anti-rotation component 400 with the first cover plate 100 and the second cover plate 200 respectively.

[0103] In some embodiments, such as Figure 2 and Figure 3 As shown, the main body 423 extends along a second direction, and multiple branch protrusions 424 are provided intersecting with the main body 423. It should be noted that the second direction here can be understood as... Figure 3 As shown in the Y direction, the main body 423 extends along the Y direction, and the branch protrusions 424 extend along the Z direction or extend obliquely along the Z direction. Multiple branch protrusions 424 are arranged at intervals along the Y direction and intersect with the main body 423. The Z direction is perpendicular to the Y direction, which makes it easier to increase the area of ​​the anti-rotation protrusion. Correspondingly, the area of ​​the anti-rotation groove will also increase, which can greatly improve the area of ​​the limiting fit between the anti-rotation protrusion and the anti-rotation groove. This can improve the positional stability of the anti-rotation component 400, which is fixedly connected to the first cover plate 100 and the second cover plate 200 to form an integral structure.

[0104] In the description of this utility model, features defined as "first" and "second" may explicitly or implicitly include one or more of the features, used to distinguish and describe features, without any order or importance.

[0105] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0106] In some embodiments, the anti-rotation member 400 covers the electrical connection portion 300 to define a first through hole 430 that mates with the electrical connection portion 300. The formation of the first through hole 430 can reduce the difficulty of mating between the electrical connection portion 300 and the anti-rotation member 400, so that the electrical connection portion 300 can pass through the anti-rotation member 400 in the first direction.

[0107] In some embodiments, such as Figure 2 As shown, both the first cover plate 100 and the second cover plate 200 are provided with a second through hole 110 that mates with the electrical connection portion 300. The formation of the second through hole 110 can reduce the difficulty of mating between the electrical connection portion 300 and the first cover plate 100 and the second cover plate 200, so that the electrical connection portion 300 can pass through between the first cover plate 100 and the second cover plate 200 in a first direction, thereby enabling the electrical connection portion 300 to connect adjacent battery cell assemblies and realize current transmission between adjacent battery cell assemblies.

[0108] It should be noted that both the first through hole 430 and the second through hole 110 can reduce the connection difficulty between the electrical connection part 300 and the first cover plate 100, the anti-rotation member 400 and the second cover plate 200, so that the electrical connection part 300 can be inserted between the first cover plate 100 and the second cover plate 200 in the first direction, thereby enabling the electrical connection part 300 to connect adjacent battery cell components, thereby realizing current transmission between adjacent battery cell components.

[0109] In one embodiment, such as Figure 2 As shown, a first insulating member 500 is provided between the electrical connection portion 300 and the second through hole 110. The two first insulating members 500 respectively achieve insulation and sealing between the first cover plate 100 and the electrical connection portion 300, and between the second cover plate 200 and the electrical connection portion 300, thereby preventing… Figure 2 The electrolyte in the battery cells 1100 located on the left and right sides in the X direction shown in the diagram flows out through the gap between the first insulating member 500 and the electrical connection portion 300, preventing short circuits between adjacent battery cells and thus ensuring the safety of the battery assembly 2000.

[0110] In some embodiments, the first insulating element 500 is made of insulating materials such as polyamide, polycarbonate, polystyrene, phenolic resin or silicone rubber.

[0111] In some embodiments, the first insulating element 500 is a ring structure.

[0112] In some embodiments, such as Figure 2 As shown, each of the first cover plate 100 and the second cover plate 200 has a receiving recess 120 on one side opposite to the anti-rotation member 400 (the receiving recess 120 on the side of the second cover plate 200 opposite to the anti-rotation member 400 is not shown). The receiving recess 120 extends circumferentially along the second through hole 110. The first insulating member 500 includes a first sealing part and a second sealing part connected to each other. The first sealing part cooperates with the receiving recess 120, and the second sealing part extends into the second through hole 110 to separate the electrical connection part 300 and the second through hole 110. Specifically, by providing the receiving recess 120, the difficulty of fitting the first insulating member 500 with the first cover plate 100 and the second cover plate 200 can be reduced. Furthermore, by configuring the first insulating member 500 to include a first sealing part and a second sealing part connected together, with the first sealing part respectively fitting with the receiving recess 120 on the first cover plate 100 and the second cover plate 200, and the second sealing part extending into the second through hole 110 of the first cover plate 100 and the second cover plate 200, the first cover plate 100 and the second cover plate 200 can be fitted together. Figure 2 The seal between the battery cells 1100 located on the left side in the X direction and the second cover plate 200 shown are as follows Figure 2The seal between the battery cells 1100 located on the right side in the X direction shown in the figure greatly prevents the electrolyte of the cell assembly in the adjacent battery cells 1100 from flowing out through the gap between the first insulating member 500 and the second through hole 110, avoiding short circuits between adjacent cell assemblies, thereby ensuring the safety of the battery assembly 2000.

[0113] In some embodiments, such as Figure 2 As shown, the first cover plate 100 and the second cover plate 200 have protrusions 210 on their sidewalls facing each other (the protrusions 210 on the sidewall of the first cover plate 100 facing the second cover plate 200 are not shown). The protrusions 210 penetrate the second through hole 110, and the protrusions 210 of the first cover plate 100 and the second cover plate 200 are engaged with each other. This facilitates the formation of the first through hole 430 on the anti-rotation member 400, thereby enabling the electrical connection part 300 to pass through the first through hole 430, so that the electrical connection part 300 can be further connected to the second through hole 110.

[0114] In a specific example, since the boss portions 210 of the first cover plate 100 and the second cover plate 200 are engaged, when the insulating material colloid of the anti-rotation member 400 is injected into the filling space defined by the first cover plate 100 and the second cover plate 200, the first through hole 430 formed surrounds the outer edge of the boss portion 210, and the insulating material colloid of the anti-rotation member 400 cannot penetrate into the second through hole 110 that penetrates the boss portion 210. As a result, the anti-rotation member 400 can form a first through hole 430 with the same size as the outer peripheral wall of the boss portion 210, so that the electrical connection portion 300 can pass through the first through hole 430 in the first direction and be installed in the anti-rotation member 400.

[0115] In some embodiments, such as Figure 2 As shown, the cover plate assembly 1000 also includes a lead-out member 600. Both the first cover plate 100 and the second cover plate 200 have lead-out members 600 on their opposite sides. The lead-out members 600 are electrically connected to the cell assembly and the electrical connection portion 300, respectively. The lead-out members 600 reduce the difficulty of connecting the cell assembly and the electrical connection portion 300, enabling the cell assembly located on the left side in the X direction to be electrically connected to one end of the electrical connection portion 300 via the lead-out member 600, and the cell assembly located on the right side in the X direction to be electrically connected to the other end of the electrical connection portion 300 via the lead-out member 600. This achieves electrical connection between adjacent cell assemblies, thereby enabling series connection between adjacent cell assemblies.

[0116] It should be noted that, by setting the lead-out part 600, this application can reduce the difficulty of welding the tabs to the first cover plate 100 and the second cover plate 200 to a certain extent, compared with the difficulty of welding the tabs to the first cover plate 100 and the second cover plate 200 in the prior art. By welding the electrical connection part 300 to the lead-out part 600, the current of the electrical connection part 300 can be made to conduct, and multiple battery cell components can be safely and effectively connected in series, thereby increasing the voltage of the battery component 2000.

[0117] In a specific example, located Figure 2 The lead-out piece 600 on the left side in the X direction shown in the figure is the positive lead-out piece, located at... Figure 2 The lead-out piece 600 on the right side in the X direction shown in the figure is the negative lead-out piece.

[0118] In some embodiments, such as Figure 2 As shown, a second insulating member 700 is provided between the lead-out member 600 and the first cover plate 100, and between the lead-out member 600 and the second cover plate 200. The electrical connection part 300 passes through the second insulating member 700 and is electrically connected to the lead-out member 600. Since the first cover plate 100 and the second cover plate 200 are made of aluminum alloy, the second insulating member 700 can achieve insulation between the lead-out member 600 and the first cover plate 100, and between the lead-out member 600 and the second cover plate 200. This can prevent short circuits between the lead-out member 600 and the first cover plate 100, and between the lead-out member 600 and the second cover plate 200, thereby ensuring the safety of the battery assembly 2000.

[0119] In some embodiments, the second insulating element 700 is made of insulating materials such as polyamide, polycarbonate, polystyrene, phenolic resin or silicone rubber.

[0120] In some embodiments, such as Figure 2 As shown, one of the lead-out member 600 and the second insulating member 700 has a connecting protrusion 710, and the other has a connecting hole 610 that mates with the connecting protrusion 710. The mating connection of the connecting protrusion 710 and the connecting hole 610 not only reduces the difficulty of connecting the lead-out member 600 and the second insulating member 700, but also ensures the positional stability of the connection structure to a certain extent. This prevents the connection structure from shaking or shifting when subjected to external impact, thus ensuring the working performance of the lead-out member 600 and the second insulating member 700.

[0121] In some embodiments, such as Figure 2As shown, the electrical connection portion 300 includes a body portion 310 and a mating portion 320 protruding from the body portion 310. The second insulating member 700 is provided with a third through hole 720. The body portion 310 passes through the third through hole 720 and is electrically connected to the lead-out member 600. The second insulating member 700 is sandwiched between the mating portion 320 and the lead-out member 600 to limit the position of the second insulating member 700, thereby ensuring the stability of the connection between the lead-out member 600, the second insulating member 700 and the electrical connection portion 300.

[0122] The electrical connection portion 300 passes through the third through hole 720 to be electrically connected to the lead-out member 600, so that current can be transmitted between the electrical connection portion 300 and the lead-out member 600, thereby enabling current to be exchanged between adjacent battery cell assemblies.

[0123] In some embodiments, the electrical connection portion 300 is welded to the lead-out member 600 to achieve a fixed connection between the electrical connection portion 300 and the lead-out member 600, while also being able to securely clamp the second insulating member 700 between the mating portion 320 and the lead-out member 600.

[0124] Specifically, the connection structure formed by welding between the electrical connection 300 and the lead-out piece 600 has high mechanical strength, which can firmly combine the electrical connection 300 and the lead-out piece 600 together. This stable connection structure can withstand various mechanical stresses that the battery pack 2000 may encounter during use, such as vibration and impact. It can reduce the probability of problems such as poor contact or open circuit between the electrical connection 300 and the lead-out piece 600 due to loose connection to a certain extent, thereby improving the reliability and safety of the battery pack 2000. In addition, the welding process between the electrical connection 300 and the lead-out piece 600 can achieve a good sealing effect, which can greatly prevent external air, moisture and other substances from entering the battery pack 2000 and avoid the chemical substances inside the battery pack 2000 from reacting with external substances, thereby ensuring the performance and safety of the battery pack 2000.

[0125] Furthermore, the welding connection can form a low-resistance connection path between the electrical connection 300 and the lead-out member 600, which greatly ensures that the current can be transmitted efficiently and stably between the electrical connection 300 and the lead-out member 600. This helps to reduce the energy loss of the battery cell 1100 during the charging and discharging process, thereby improving the overall efficiency and performance of the battery pack 2000.

[0126] In some embodiments, combined with Figure 2 , Figure 7 and Figure 8As shown, one of the lead-out member 600 and the electrical connection portion 300 has a positioning groove 620, and the other has a positioning protrusion 330 that mates with the positioning groove 620. By extending the positioning protrusion 330 into the positioning groove 620 and engaging with it, not only is the connection difficulty between the lead-out member 600 and the electrical connection portion 300 reduced, but a firm fit between them is also achieved. This ensures the stability of the connection structure between the lead-out member 600 and the electrical connection portion 300, thereby guaranteeing the performance of the battery assembly 2000.

[0127] In some embodiments, when the lead-out member 600 is provided with a positioning groove 620, the electrical connection portion 300 is provided with a positioning protrusion 330 that mates with the positioning groove 620; or, when the electrical connection portion 300 is provided with a positioning groove 620, the lead-out member 600 is provided with a positioning protrusion 330 that mates with the positioning groove 620. Both of these configurations of the positioning groove 620 and the positioning protrusion 330 ensure a secure fit between the lead-out member 600 and the electrical connection portion 300, thereby guaranteeing the stability of the connection structure between the lead-out member 600 and the electrical connection portion 300 to a certain extent.

[0128] In a specific example, the positioning protrusion 330 is actually part of the body portion 310 of the electrical connection portion 300.

[0129] In summary, located in Figure 2 The lead-out piece 600 on the left side in the X direction shown in the figure is the positive lead-out piece, located at... Figure 2 The lead-out piece 600 on the right side in the X direction shown is a negative lead-out piece. The electrical connection part 300 passes through the connection hole 610 of the positive lead-out piece, the third through hole 720 of the second insulating member 700, the first insulating member 500, the second through hole 110 of the first cover plate 100, the first through hole 430 of the anti-rotation member 400, the second through hole 110 of the second cover plate 200, the first insulating member 500, the third through hole 720 of the second insulating member 700, and the connection hole 610 of the negative lead-out piece in sequence, thereby forming a cover plate assembly 1000. The positive lead-out piece and the negative lead-out piece are then welded to the tabs on the adjacent cell assembly, respectively, to finally achieve current conduction between the adjacent cell assemblies.

[0130] It is worth noting that the anti-rotation component 400 can initially fix the connection between the first cover plate 100 and the second cover plate 200. Furthermore, during welding... Figure 2 When the lead-out parts 600 and electrical connection parts 300 on the left and right sides of the X direction are shown, the lead-out parts 600 on both sides exert a certain extrusion force in the direction of the first cover plate 100 and the second cover plate 200, so that the first cover plate 100 and the second cover plate 200 are more tightly connected together, thereby enhancing the connection reliability of the first cover plate 100 and the second cover plate 200, and thus realizing the stability of the fixed connection of the first cover plate 100 and the second cover plate 200.

[0131] The battery assembly 2000 of this utility model is described below with reference to the accompanying drawings.

[0132] like Figure 1 As shown, a battery assembly 2000 according to an embodiment of the present invention includes: a plurality of battery cells 1100 arranged along a first direction and a cover plate assembly 1000.

[0133] The battery cell 1100 includes a cell assembly. The cell assembly can convert electrical energy into chemical energy through a chemical reaction and store it, and then convert the chemical energy back into electrical energy when needed to provide power to external devices.

[0134] Two adjacent cell modules are connected in series via a cover plate assembly 1000, which is the aforementioned cover plate assembly 1000. Connecting two adjacent cell modules in series with the cover plate assembly 1000 can maximize the voltage of the battery module 2000, thereby enabling the battery module 2000 to generate or store more electrical energy.

[0135] In a specific example, the battery assembly 2000 of this application may include two or more cell assemblies. As long as two adjacent cell assemblies 200 are connected by a common cover plate assembly 1000, the battery assembly 2000 and the voltage can be maximized and increased.

[0136] As can be seen from the above structure, the battery assembly 2000 of this utility model embodiment, by setting multiple battery cells 1100 arranged along the first direction and cover plate assembly 1000, and connecting two adjacent battery cell assemblies in series through cover plate assembly 1000, can realize the current between multiple battery cell assemblies can be transmitted through cover plate assembly 1000, thereby enabling the battery assembly 2000 to generate or store more electrical energy.

[0137] In some embodiments, the two ends of the electrical connection portion 300 are fixedly connected to two adjacent battery cell assemblies, respectively. This allows the two adjacent battery cell assemblies to transmit current through the electrical connection portion 300, thereby achieving electrical conduction between the two adjacent battery cell assemblies.

[0138] In some embodiments, such as Figure 1As shown, each battery cell 1100 includes a housing 1110, which defines an open-end receiving cavity. The battery cell assembly is disposed within the receiving cavity. A first cover plate 100 and a second cover plate 200 respectively seal the openings 1111 of adjacent housings 1110. The housing 1110 provides stable support for the battery cell assembly, greatly preventing the battery cell assembly within the receiving cavity from external impact forces, thus maintaining the positional stability of the battery cell assembly and ensuring its operational stability. Furthermore, by sealing the openings 1111 of adjacent housings 1110 with the first cover plate 100, the first cover plate 100 can be positioned within the receiving cavity. Figure 1 The housing 1110 on the left side in the X direction and the second cover 200 are able to be sealed together and located at the... Figure 1 The housing 1110 on the right side in the X direction is sealed together, thereby making the first cover plate 100 and the housing located in the X direction sealed together. Figure 1 The housing 1110 on the left side in the X direction and the second cover 200 and located in Figure 1 The housing 1110 on the right side of the X direction forms a closed chamber, which can prevent external impurities from interfering with the normal operation of adjacent cell components, thereby ensuring the working performance of the battery component 2000 to a certain extent.

[0139] It should be noted that the housing 1110 is provided with a mating step. The mating step is formed by rounding the ends of the housing 1110. The mating step can reduce the difficulty of mating adjacent housings 1110 and cover plate assembly 1000. At the same time, it can also ensure that the connection structure between adjacent housings 1110 and cover plate assembly 1000 is sealed, preventing external impurities from entering the interior of battery assembly 2000.

[0140] In some embodiments, the housing 1110 is made of aluminum alloy, which can provide stable support for the cell assembly and, to a certain extent, ensure the structural stability of the entire battery cell 1100.

[0141] It should also be noted that the assembly process of the cover plate assembly 1000 is as follows: Figure 2 As shown, firstly, the tabs on the cell assembly located on the left side of the X direction are welded to the lead-out member 600. The positioning groove 620 of the lead-out member 600 is connected to the connecting protrusion 710 of the second insulator 700 to achieve a fixed connection between the lead-out member 600 and the second insulator 700. The first insulator 500 is fixedly connected to the first cover plate 100 through the receiving recess 120, so that the electrical connection part 300 passes through the first cover plate 100, the second insulator 700 and the lead-out member 600 are welded to each other for electrical connection. Then, the first cover plate 100 closes the opening 1111 of the housing 1110 of the battery cell 1100 located on the left side of the X direction and is welded to the housing 1110.

[0142] The tabs on the cell assembly located on the right side of the X direction are welded to the lead-out member 600. The positioning groove 620 of the lead-out member 600 is connected by the connecting protrusion 710 of the second insulating member 700 to achieve a fixed connection between the lead-out member 600 and the second insulating member 700. The first insulating member 500 is fixedly connected to the second cover plate 200 through the receiving recess 120, so that the electrical connection part 300 passes through the second cover plate 200, the second insulating member 700 and the lead-out member 600 are welded to each other for electrical connection. Then the second cover plate 200 closes the opening 1111 of the housing 1110 of the battery cell 1100 located on the right side of the X direction and is welded to the housing 1110.

[0143] Finally, by injecting the colloid of the insulating material into the filling space between the first cover plate 100 and the second cover plate 200, the anti-rotation component 400 defines a second anti-rotation structure 420 that cooperates with the first anti-rotation structure 410, thereby completing the final assembly of the cover plate assembly 1000.

[0144] The following describes the battery pack according to an embodiment of the present invention.

[0145] The battery pack according to an embodiment of the present invention includes the aforementioned battery assembly 2000.

[0146] According to the embodiments of the present invention, the battery pack can improve its working performance to a certain extent by using the aforementioned battery assembly 2000.

[0147] The following describes the electrical device according to an embodiment of the present invention.

[0148] The electrical device according to an embodiment of the present invention includes the aforementioned battery pack.

[0149] According to the embodiments of the present invention, the electrical device can improve its working performance to a certain extent by using the aforementioned battery pack.

[0150] 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.

[0151] 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.

[0152] In some embodiments, the electrical device is a vehicle, which may be a pure electric vehicle or a hybrid vehicle.

[0153] 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.

[0154] Figure 1 The illustration shows a cover plate assembly 1000 connecting two battery cells 1100 for illustrative purposes. However, after reading the above technical solution, those skilled in the art will obviously understand that the solution can be applied to technical solutions where two cover plate assemblies 1000 connect three battery cells 1100, three cover plate assemblies 1000 connect four battery cells 1100, four cover plate assemblies 1000 connect five battery cells 1100, or more cover plate assemblies 1000 connect more battery cells 1100. This also falls within the protection scope of this utility model.

[0155] The specific structures of the cover plate assembly 1000, battery assembly 2000, battery pack, and other components of the power supply device according to the embodiments of the present invention, such as cell assemblies and tabs, are known to those skilled in the art and will not be described in detail here.

[0156] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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.

[0157] 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 cover plate assembly, characterized in that, The cover plate assembly is adapted to connect two adjacent battery cells (1100) in series, the cover plate assembly comprising: A first cover plate (100) and a second cover plate (200) are arranged in a first direction, and the first cover plate (100) and the second cover plate (200) are provided with a first anti-rotation structure (410) on their sidewalls facing each other; An electrical connection portion (300) is provided through the first cover plate (100) and the second cover plate (200) in the first direction, and the two ends of the electrical connection portion (300) are respectively electrically connected to two adjacent battery cell assemblies; An anti-rotation component (400) is made of insulating material and is disposed between the first cover plate (100) and the second cover plate (200) to fix the first cover plate (100) and the second cover plate (200). The anti-rotation component (400) defines a second anti-rotation structure (420) that cooperates with the first anti-rotation structure (410).

2. The cover plate assembly according to claim 1, characterized in that, A filling space is defined between the first cover plate (100) and the second cover plate (200), and the anti-rotation component (400) is an injection-molded material part to fill the filling space and fix the first cover plate (100) and the second cover plate (200).

3. The cover plate assembly according to claim 1, characterized in that, The first anti-rotation structure (410) is an anti-rotation groove, and a portion of the anti-rotation member (400) fills the anti-rotation groove to form an anti-rotation protrusion, the anti-rotation protrusion defining the second anti-rotation structure (420); or The first anti-rotation structure (410) is an anti-rotation protrusion, and the anti-rotation member (400) wraps around the anti-rotation protrusion to form an anti-rotation groove that cooperates with the anti-rotation protrusion. The anti-rotation groove defines the second anti-rotation structure (420).

4. The cover plate assembly according to claim 3, characterized in that, The anti-rotation protrusion includes a first part (421) and a second part (422) with different cross-sectional areas. The cross-sectional area of ​​the second part (422) is larger than that of the first part (421), and the second part (422) protrudes from the end of the first part (421).

5. The cover plate assembly according to claim 3, characterized in that, The shape of the anti-rotation protrusion projected in the first direction is non-circular, and the shape of the anti-rotation groove projected in the first direction is non-circular.

6. The cover plate assembly according to claim 5, characterized in that, The anti-rotation groove includes a main cavity (411) and a branch cavity (412) communicating with the main cavity (411). The anti-rotation protrusion includes a main body (423) and a branch protrusion (424) protruding from the main body (423). The main body (423) fills the main cavity (411), and the branch protrusion (424) is located in the branch cavity (412).

7. The cover plate assembly according to claim 6, characterized in that, The main body (423) extends along the second direction, and there are multiple branch protrusions (424) that intersect with the main body (423).

8. The cover plate assembly according to claim 1, characterized in that, The anti-rotation component (400) covers the electrical connection portion (300) to define a first through hole (430) that mates with the electrical connection portion (300).

9. The cover plate assembly according to claim 1, characterized in that, Both the first cover plate (100) and the second cover plate (200) are provided with a second through hole (110) that mates with the electrical connection part (300); A first insulating element (500) is provided between the electrical connection part (300) and the second through hole (110).

10. The cover plate assembly according to claim 9, characterized in that, Each of the first cover plate (100) and the second cover plate (200) has a receiving recess (120) on the side opposite to the anti-rotation member (400). The receiving recess (120) extends circumferentially along the second through hole (110). The first insulating member (500) includes a first sealing part and a second sealing part connected to each other. The first sealing part cooperates with the receiving recess (120). The second sealing part extends into the second through hole (110) to separate the electrical connection part (300) and the second through hole (110).

11. The cover plate assembly according to claim 9, characterized in that, The first cover plate (100) and the second cover plate (200) have protrusions (210) on their sidewalls facing each other. The protrusions (210) penetrate the second through hole (110), and the protrusions (210) of the first cover plate (100) and the second cover plate (200) are in a stop-and-go fit.

12. The cover plate assembly according to any one of claims 1-11, characterized in that, It also includes lead-out members (600), which are provided on the side of the first cover plate (100) and the second cover plate (200) facing away from each other. The lead-out members (600) are electrically connected to the battery cell assembly and the electrical connection part (300), respectively.

13. The cover plate assembly according to claim 12, characterized in that, A second insulating member (700) is provided between the lead-out member (600) and the first cover plate (100), and between the lead-out member (600) and the second cover plate (200). The electrical connection part (300) passes through the second insulating member (700) and is electrically connected to the lead-out member (600).

14. The cover plate assembly according to claim 13, characterized in that, One of the lead-out member (600) and the second insulating member (700) has a connecting protrusion (710), and the other has a connecting hole (610) that mates with the connecting protrusion (710).

15. The cover plate assembly according to claim 13, characterized in that, The electrical connection portion (300) includes a body portion (310) and a mating portion (320) protruding from the body portion (310). The second insulating member (700) is provided with a third through hole (720). The body portion (310) passes through the third through hole (720) and is electrically connected to the lead-out member (600). The second insulating member (700) is sandwiched between the mating portion (320) and the lead-out member (600).

16. The cover plate assembly according to claim 15, characterized in that, The electrical connection part (300) is welded to the lead-out part (600).

17. The cover plate assembly according to claim 12, characterized in that, One of the lead-out member (600) and the electrical connection part (300) has a positioning groove (620), and the other has a positioning protrusion (330) that mates with the positioning groove (620).

18. A battery assembly, characterized in that, include: Multiple battery cells (1100) arranged along a first direction, wherein each battery cell (1100) includes a cell assembly; A cover plate assembly, wherein two adjacent cell assemblies are connected in series via a cover plate assembly, wherein the cover plate assembly is the cover plate assembly according to any one of claims 1-17.

19. The battery assembly according to claim 18, characterized in that, The two ends of the electrical connection part (300) are respectively fixedly connected to two adjacent battery cell assemblies.

20. The battery assembly according to claim 18, characterized in that, Each of the battery cells (1100) includes a housing (1110) that defines an end-open receiving cavity in which the cell assembly is disposed, and a first cover plate (100) and a second cover plate (200) respectively block the openings (1111) of adjacent housings (1110).

21. A battery pack, characterized in that, Includes the battery assembly according to any one of claims 18-20.

22. An electrical appliance, characterized in that, Includes the battery pack as described in claim 21.

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