Connecting assembly, battery unit, battery assembly, battery pack and electric device

Abstract

The invention discloses a connecting assembly, a battery unit, a battery assembly, a battery pack and a power utilization device, the connecting assembly comprises a cover plate assembly, a positive pole and a negative pole, the cover plate assembly is arranged between two adjacent battery monomers, and a first mounting hole is formed in the cover plate assembly; at least part of the positive pole post and at least part of the negative pole post are arranged in the first mounting hole and are respectively connected with the cover plate assembly, in two adjacent battery monomers, the positive pole post is matched and connected with the positive lug of one battery monomer, and the negative pole post is matched and connected with the negative lug of the other battery monomer; a sealed space is defined by the positive pole, the negative pole and the cover plate assembly, a channel penetrating through the positive pole and / or the negative pole is arranged on the positive pole and / or the negative pole, and at least part of the channel is communicated with the sealed space. According to the connecting assembly disclosed by the embodiment of the invention, the capacity and the space utilization rate of the battery pack can be improved, and electrolyte is prevented from flowing into gaps among the positive pole, the negative pole and the cover plate assembly, so that internal conduction of the adjacent battery monomers is avoided.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a connection component, a battery cell, a battery assembly, a battery pack, and an electrical device. Background Technology

[0002] With the surge in demand for high-voltage power supply from electrical devices, a single battery cell can no longer meet the needs of efficient operation of these devices.

[0003] In the prior art, in order to solve the above problems, multiple battery cells are usually set up. However, the connection of multiple battery cells is relatively complicated, resulting in high connection costs and reduced space utilization of the battery pack, which cannot effectively improve the capacity and voltage of the battery pack. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the first objective of the present invention is to provide a connecting component that not only enables the series connection of multiple battery cells, thereby increasing the capacity and voltage of the battery pack, saving costs, and improving the space utilization of the battery pack, but also prevents electrolyte from flowing into the gaps between the positive electrode post, negative electrode post, and cover plate assembly, thus solving the technical problems of high cost of connecting multiple battery cells and reduced space utilization of the battery pack in the prior art.

[0005] A second objective of the present invention is to provide a battery cell having the above-described connecting components.

[0006] A third objective of the present invention is to provide a battery assembly having the aforementioned battery cells.

[0007] A fourth objective of the present invention is to provide a battery pack having the aforementioned battery cells or battery components.

[0008] The fifth objective of this invention is to provide an electrical device having the aforementioned battery pack.

[0009] According to an embodiment of the present invention, a connection assembly includes: a cover plate assembly adapted to be disposed between two adjacent battery cells, the cover plate assembly having a first mounting hole; a positive terminal and a negative terminal connected to each other, at least a portion of the positive terminal and at least a portion of the negative terminal being disposed in the first mounting hole and respectively connected to the cover plate assembly; in two adjacent battery cells, the positive terminal is connected to the positive tab of one of the battery cells, and the negative terminal is connected to the negative tab of the other battery cell; wherein a sealed space is formed between the positive terminal, the negative terminal, and the cover plate assembly, and the positive terminal and / or the negative terminal has a through-hole, at least a portion of the through-hole communicating with the sealed space.

[0010] According to the connecting assembly of the present invention, by providing a connecting assembly between two adjacent battery cells and configuring the connecting assembly to cooperate with each of the two adjacent battery cells, the two adjacent battery cells can be connected in series, which facilitates the improvement of the capacity and voltage of the battery assembly or battery pack, while saving the connection cost of the battery assembly or battery pack and improving the space utilization of the battery assembly or battery pack. By providing a through-hole channel on the positive electrode post and / or negative electrode post, and configuring at least a portion of the channel to connect a sealed space, it is convenient to use the channel to detect the sealing performance of the sealed space, thereby ensuring the sealing reliability between the positive electrode post, negative electrode post and cover plate assembly, preventing electrolyte from flowing into the gaps of the positive electrode post, negative electrode post and cover plate assembly, thereby preventing internal conduction between adjacent battery cells and improving the performance of the battery assembly or battery pack. In other words, the connecting assembly of this application not only enables the battery assembly or battery pack to have advantages such as large capacity, high voltage and low cost, but also prevents internal conduction between two adjacent battery cells, thereby ensuring the working performance of the battery cells.

[0011] In some embodiments, at least a portion of the channel at one end away from the sealed space communicates with the external space of the connecting assembly.

[0012] In some embodiments, the cover plate assembly includes a cover plate and an insulating member. The cover plate has a second mounting hole, and the insulating member is sealed and connected in the second mounting hole. The insulating member has a first mounting hole, and at least a portion of the positive electrode post and at least a portion of the negative electrode post are disposed in the first mounting hole and sealed and connected in the insulating member. The sealed space is formed between the positive electrode post, the negative electrode post and the insulating member.

[0013] In some embodiments, the sealed space includes a first spacer space and a second spacer space that are interconnected, the first spacer space being formed between one of the positive terminal post and the negative terminal post and the insulating member, the second spacer space being formed between the other of the positive terminal post and the negative terminal post and the insulating member, and the channel being directly opposite the first spacer space and / or the second spacer space.

[0014] In some embodiments, one of the positive electrode post and the negative electrode post has a connecting portion, and one of the positive electrode post and the negative electrode post is connected to the insulating member through the connecting portion. A first gap space is formed between one of the positive electrode post and the negative electrode post, the connecting portion and the insulating member, and the channel faces the first gap space.

[0015] In some embodiments, the other of the positive terminal and the negative terminal has a stop portion connected to the insulating member, and at least a portion of the stop portion is spaced apart from the insulating member to form the second gap space.

[0016] In some embodiments, the connection assembly further includes a seal, through which the insulating element is connected to the cover plate.

[0017] In some embodiments, a first groove is provided on one end of the insulating member, one of the positive electrode post and the negative electrode post is connected to the insulating member to form a first connection point, and the sealing member is connected to the insulating member to form a second connection point. The first connection point and the second connection point are located at the end of the insulating member where the first groove is provided, and the first connection point and the second connection point are spaced apart on opposite sides of the first groove.

[0018] In some embodiments, a third gap space is formed between the first connection and the second connection, and the third gap space is disposed adjacent to the sealing space.

[0019] In some embodiments, the channel connects the junction of the positive terminal and the negative terminal.

[0020] In some embodiments, the channel includes a first channel and a second channel, a first end of the second channel communicating with the sealed space, a second end of the second channel communicating with the external space of the connecting assembly, and the first channel communicating with the second channel and the connection point between the positive electrode post and the negative electrode post.

[0021] In some embodiments, the connection assembly further includes a nickel sheet disposed between the positive terminal and the negative terminal, and the nickel sheet is welded to the positive terminal and the negative terminal respectively.

[0022] In some embodiments, the positive electrode post and the negative electrode post are mutually restrictive and coordinated.

[0023] In some embodiments, a second groove is provided on the other of the positive electrode post and the negative electrode post, and at least a portion of the positive electrode post and the negative electrode post is limited and fitted within the second groove.

[0024] In some embodiments, one of the positive electrode post and the negative electrode post is provided with a limiting protrusion. In the installation direction of the positive electrode post and the negative electrode post, the limiting protrusion is located outside the second groove and abuts against the end of the side wall of the second groove.

[0025] In some embodiments, the connection assembly further includes a positive lead and a negative lead, wherein the positive lead is connected to the positive terminal and the negative lead is connected to the negative terminal.

[0026] In some embodiments, the connection assembly further includes a first insulating plate and a second insulating plate, the first insulating plate being disposed between the cover plate assembly and the positive electrode lead plate, and the second insulating plate being disposed between the cover plate assembly and the negative electrode lead plate.

[0027] In some embodiments, the cover plate assembly has mating portions on opposite sides, and the mating portions are mated and connected to the outer casing of the corresponding battery cell.

[0028] In some embodiments, the mating portion is a mating recess formed on the cover plate assembly, and at least a portion of the housing is disposed within the mating recess.

[0029] A battery cell according to an embodiment of the present invention includes: at least two battery cells, the at least two battery cells being disposed opposite to each other along a first direction; and a connecting component, the connecting component being the aforementioned connecting component, the connecting component being disposed between two adjacent battery cells.

[0030] According to the battery cell of the present invention, by employing the aforementioned connecting components, two adjacent battery cells can be effectively connected, which facilitates the improvement of the battery cell's capacity and space utilization. At the same time, it can also prevent electrolyte from flowing into the gaps between the positive electrode post, the negative electrode post, and the cover plate assembly, thereby preventing internal conduction between adjacent battery cells and improving the performance of the battery cell.

[0031] In some embodiments, the battery cell includes a housing, each housing having an opening at one end facing the adjacent housing, and a cover assembly disposed at the opening and engaging with the two adjacent housings respectively.

[0032] The battery assembly according to an embodiment of the present invention includes a plurality of the aforementioned battery cells.

[0033] According to the battery assembly of the present invention, by employing the aforementioned battery cells, the working performance of the battery assembly can be guaranteed to a certain extent, and the space utilization rate of the battery assembly can be improved.

[0034] According to embodiments of the present invention, a battery pack includes a plurality of the aforementioned battery cells; or, includes a plurality of the aforementioned battery assemblies.

[0035] According to the embodiments of the present invention, by employing the aforementioned battery cells or battery assemblies, the battery pack can improve the capacity and space utilization of the battery pack and ensure the working performance of the battery pack.

[0036] An electrical device according to an embodiment of the present invention includes the aforementioned battery pack.

[0037] According to the embodiments of the present invention, by employing the aforementioned battery pack, the electrical device can, to a certain extent, guarantee its working performance and meet the requirements for efficient operation.

[0038] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. Attached Figure Description

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0040] Figure 1 This is a schematic diagram of a battery assembly according to some embodiments of the present invention.

[0041] Figure 2 This is an exploded view of a battery cell according to some embodiments of the present invention.

[0042] Figure 3 This is an exploded view of the connection components according to some embodiments of the present invention.

[0043] Figure 4 This is a cross-sectional view of a connection component according to some embodiments of the present invention.

[0044] Figure 5 This is a cross-sectional view of the connecting component from another angle in some embodiments of the present invention.

[0045] Figure label:

[0046] 2000, Battery Components;

[0047] 1000, battery cell;

[0048] 100. Battery cell;

[0049] 110. Outer shell; 111. Opening;

[0050] 200. Connecting components;

[0051] 210. Positive terminal post;

[0052] 212, Channel; 2121, First Channel; 2122, Second Channel;

[0053] 221. Limiting convex part;

[0054] 220. Negative terminal post; 222. Stop portion; 211. Second groove;

[0055] 213. Connecting part;

[0056] 230. Nickel sheet;

[0057] 295. Cover plate assembly;

[0058] 240. Cover plate; 241. Second mounting hole; 242. Mating part;

[0059] 250. Insulating component; 251. First groove; 254. First mounting hole;

[0060] 252. First connection point; 253. Second connection point;

[0061] 260. Sealing components;

[0062] 270, positive electrode lead sheet; 280, negative electrode lead sheet;

[0063] 290. First insulating board; 291. Second insulating board;

[0064] 293. Sealed space; 292. First partition space; 294. Second partition space;

[0065] 296. Third interval space. Detailed Implementation

[0066] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] The connection component 200 of an embodiment of the present invention is described below with reference to the accompanying drawings.

[0069] Combination Figure 1 , Figure 2 and Figure 3 As shown, a connection assembly 200 according to an embodiment of the present invention includes: a cover plate assembly 295, a positive terminal post 210, and a negative terminal post 220.

[0070] Among them, such as Figure 2 As shown, the cover assembly 295 is adapted to be disposed between two adjacent battery cells 100, and the cover assembly 295 is provided with a first mounting hole 254. By disposing of the connecting assembly 200 between two adjacent battery cells 100, it is convenient to use the connecting assembly 200 to achieve the connection between the two adjacent battery cells 100, so that current can flow between the two adjacent battery cells 100, and the difficulty of electrical connection between the two adjacent battery cells 100 is reduced.

[0071] In some embodiments, combined with Figure 1 and Figure 2 As shown, at least two battery cells 100 are arranged along a first direction. It should be noted that the first direction referred to here can be understood as... Figure 2 As shown in the X direction, by arranging at least two battery cells 100 along the X direction, the internal space of the battery assembly 2000 or battery pack can be better utilized, so that more battery cells 100 can be installed in the limited internal space of the battery assembly 2000 or battery pack, thereby increasing the capacity of the battery assembly 2000 or battery pack to a certain extent.

[0072] It should be noted that the above-mentioned at least two battery cells 100 refers to two or more. That is to say, the battery cell 1000 of this application may include two or more battery cells 100. The specific number of battery cells 100 is not limited. As long as two adjacent battery cells 100 arranged along the first direction are connected by the connecting component 200, the capacity and voltage of the battery cell 1000 can be improved.

[0073] Combination Figure 2 and Figure 3 As shown, the positive terminal 210 and the negative terminal 220 are interconnected. At least a portion of the positive terminal 210 and at least a portion of the negative terminal 220 are disposed in the first mounting hole 254 and are respectively connected to the cover plate assembly 295. In two adjacent battery cells 100, the positive terminal 210 is connected to the positive tab (not shown) of one of the battery cells 100, and the negative terminal 220 is connected to the negative tab (not shown) of the other battery cell 100. This connection between adjacent battery cells 100 allows current to flow between them, thereby increasing the voltage and capacity of the battery cell 1000 to a certain extent.

[0074] Meanwhile, by using a connecting component 200 to connect two adjacent battery cells 100, compared to setting two interconnected connectors that are respectively connected to two adjacent battery cells 100, this application can simplify the structure of the battery cell 1000, reduce the manufacturing cost of the battery cell 1000, and improve the space utilization of the battery module 2000 or battery pack.

[0075] It is worth noting that this application configures the connection component 200 to include a positive terminal 210 and a negative terminal 220, and configures the positive terminal 210 to be connected to the positive tab of the battery cell 100 and the negative terminal 220 to be connected to the negative tab of the battery cell 100. Compared with the prior art of welding the tabs (positive and negative tabs) to the electrical boss, this can avoid affecting the shape of the tabs after welding and ensure the working performance of the tabs.

[0076] Combination Figure 2 , Figure 3 and Figure 4 As shown, a sealed space 293 is formed between the positive electrode post 210, the negative electrode post 220, and the cover plate assembly 295. The positive electrode post 210 and / or the negative electrode post 220 are provided with channels 212 penetrating through it, at least a portion of which connects to the sealed space 293. This allows for the use of channels 212 to detect the sealing performance of the sealed space 293, ensuring the sealing performance of the connection between the positive electrode post 210, the negative electrode post 220, and the cover plate assembly 295. This, in turn, ensures the sealing performance of the connection assembly 200, preventing electrolyte flow between adjacent battery cells 100 in the battery cell 1000, thus preventing short circuits between adjacent battery cells 100 and ensuring the operational performance of the battery cell 1000.

[0077] In some embodiments, when at least a portion of the positive electrode post 210 and at least a portion of the negative electrode post 220 are disposed in the first mounting hole 254 and respectively connected to the cover plate assembly 295, gas can be injected into the channel 212 by a welding inspection machine so that the gas can enter the sealed space 293. Then, it is detected whether there is gas discharge from the outer periphery of the sealed space 293, so as to achieve the purpose of detecting the sealing performance of the sealed space 293, that is, to detect the sealing performance of the positive electrode post 210 and the negative electrode post 220 at the connection with the cover plate assembly 295 respectively.

[0078] It should be noted that when gas is detected escaping from the outer periphery of the sealed space 293, the connection quality between the positive electrode post 210, the negative electrode post 220 and the cover plate assembly 295 can be strengthened until no gas is detected escaping from the outer periphery of the sealed space 293, thereby ensuring the sealing performance of the sealed space 293 and preventing the electrolyte from flowing between adjacent battery cells 100 in the battery cell 1000.

[0079] It should also be noted that the aforementioned provision of a through-channel 212 on the positive terminal 210 and / or the negative terminal 220 means that the positive terminal 210 has a through-channel 212; or, the negative terminal 220 has a through-channel 212; or, both the positive terminal 210 and the negative terminal 220 have through-channels 212. When the positive terminal 210 has a through-channel 212, the through-channel 212 penetrates the positive terminal 210; when the negative terminal 220 has a through-channel 212, the through-channel 212 penetrates the negative terminal 220, so that at least a portion of the through-channel 212 can connect to the sealed space 293, ensuring the working performance of the through-channel 212.

[0080] As can be seen from the above structure, the connecting component 200 of the present invention is configured to connect with two adjacent battery cells 100 respectively, so that the two adjacent battery cells 100 can be connected in series. This can improve the voltage capacity of the battery cell 1000 to a certain extent, save the cost of the battery cell 1000, and improve the space utilization of the battery assembly 2000 or battery pack.

[0081] Meanwhile, by providing channels 212 on the positive electrode post 210 and / or the negative electrode post 220, and configuring at least a portion of the channels 212 to connect the positive electrode post 210, the negative electrode post 220, and the cover plate assembly 295 to enclose the sealed space 293, the sealing performance of the sealed space 293 can be detected by using the channels 212. This helps to ensure the connection sealing performance between the positive electrode post 210, the negative electrode post 220, and the cover plate assembly 295, thereby ensuring the sealing performance of the connection assembly 200, preventing the electrolyte from flowing between two adjacent battery cells 100 in the battery cell 1000, and thus preventing short circuits between two adjacent battery cells 100, thereby ensuring the working performance of the battery cell 1000.

[0082] It is understandable that, compared with the prior art, the connection component 200 of this application not only enables the battery cell 1000 to have advantages such as large capacity, high voltage and low cost, but also takes into account the sealing reliability between the positive terminal 210, the negative terminal 220 and the cover plate assembly 295, thereby ensuring the working performance of the battery cell 1000.

[0083] In some embodiments, such as Figure 4 As shown, at least a portion of the channel 212 has one end facing away from the sealed space 293 connected to the external space of the connecting assembly 200. This can also be understood as at least a portion of the channel 212 opening towards the external space of the connecting assembly 200 to facilitate the injection of gas into the channel 212, thereby facilitating the detection of the sealing performance of the sealed space 293 and reducing the difficulty of detecting the sealing performance at the connection points of the positive electrode post 210 and the negative electrode post 220 with the cover plate assembly 295.

[0084] In some embodiments, such as Figure 4 As shown, channel 212 connects the connection point of positive electrode post 210 and negative electrode post 220. In other words, channel 212 of this application not only connects to the sealed space 293 but also to the connection point of positive electrode post 210 and negative electrode post 220. This facilitates the discharge of air generated during the connection of positive electrode post 210 and negative electrode post 220, greatly preventing the formation of air gaps at the connection surface of positive electrode post 210 and negative electrode post 220 due to thermal expansion. This ensures the connection quality of positive electrode post 210 and negative electrode post 220, thereby guaranteeing the connection yield and improving the connection quality of adjacent battery cells 1000, thus facilitating the improvement of the performance of the battery cell 1000.

[0085] In some embodiments, the positive electrode post 210 and the negative electrode post 220 are welded together, which helps to improve the connection strength between the positive electrode post 210 and the negative electrode post 220, thereby improving the connection strength between two adjacent battery cells 100 and enhancing the working performance of the battery cell 1000.

[0086] In some embodiments, such as Figure 4 As shown, channel 212 includes a first channel 2121 and a second channel 2122. The first end of the second channel 2122 is connected to the sealed space 293, and the second end of the second channel 2122 is connected to the external space of the connecting assembly 200. This allows the opposite ends of the second channel 2122 to be connected to the sealed space 293 and the external space of the connecting assembly 200, respectively, facilitating the injection of gas into the sealed space 293 through the channel 212. This makes it easier to test the sealing performance of the sealed space 293 and reduces the difficulty of testing the sealing performance at the connection points of the positive electrode post 210 and the negative electrode post 220 with the cover plate assembly 295.

[0087] In some embodiments, such as Figure 4 As shown, the first channel 2121 is connected to the second channel 2122 and the connection point between the positive terminal 210 and the negative terminal 220. This allows the opposite ends of the first channel 2121 to connect to the external space of the connecting assembly 200 and the connection point between the positive terminal 210 and the negative terminal 220, respectively. This facilitates the discharge of air generated when the positive terminal 210 and the negative terminal 220 are connected via the first channel 2121, thereby achieving the purpose of discharging air generated when the positive terminal 210 and the negative terminal 220 are connected via channel 212, ensuring the performance of channel 212.

[0088] In some embodiments, combined with Figure 4 and Figure 5As shown, the positive terminal 210 and the negative terminal 220 are arranged opposite each other along a first direction, and the first channel 2121 extends along the first direction. This is so that the first channel 2121 is positioned directly opposite the connection point of the positive terminal 210 and the negative terminal 220, thereby facilitating the discharge of air generated when the positive terminal 210 and the negative terminal 220 are connected.

[0089] In some embodiments, combined with Figure 4 and Figure 5 As shown, both the first channel 2121 and the second channel 2122 are located at the positive terminal post 210 and pass through the positive terminal post 210.

[0090] In some other embodiments, the first channel 2121 and the second channel 2122 may both be provided on the negative electrode post 220 and pass through the negative electrode post 220; or, the positive electrode post 210 and the negative electrode post 220 may both be provided with the first channel 2121 and the second channel 2122 passing through them.

[0091] In summary, as Figure 4 As shown, the first channel 2121 and the second channel 2122 are interconnected. In a specific example, after the sealing space 293 is tested for sealing performance through the second channel 2122, sealant or molten solder can be filled into the first channel 2121 and the second channel 2122 to ensure the sealing performance of the first channel 2121 and the second channel 2122, and further ensure the sealing performance of the connecting assembly 200.

[0092] Specifically, sealant or molten solder can be filled into the second channel 2122 firstly, and the sealant or molten solder flows into the first channel 2121 along the second channel 2122, ensuring that both the first channel 2121 and the second channel 2122 can be filled and sealed by sealant or molten solder, thereby preventing short circuits between adjacent battery cells 100 caused by electrolyte flow.

[0093] In the description of this invention, 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.

[0094] In some embodiments, combined with Figure 3 and Figure 4As shown, the connecting assembly 200 also includes a nickel sheet 230, which is disposed between the positive electrode post 210 and the negative electrode post 220. The nickel sheet 230 is welded to both the positive electrode post 210 and the negative electrode post 220. This achieves a welded fit between the positive electrode post 210 and the negative electrode post 220, reduces the welding difficulty of the positive electrode post 210 and the negative electrode post 220, and enables electrical conduction between the positive electrode post 210 and the negative electrode post 220. This further ensures that current can be smoothly transferred between the positive electrode post 210 and the negative electrode post 220, thereby improving the working performance of the battery cell 1000.

[0095] In some embodiments, the positive electrode post 210, the nickel sheet 230, and the negative electrode post 220 are brazed together to form an integral structure. This can also be understood as the nickel sheet 230 being fixedly connected to the positive electrode post 210 and the negative electrode post 220 respectively by brazing, so as to facilitate electrical conduction between two adjacent battery cells 100.

[0096] It should be noted that, due to the good electrical and thermal conductivity of the nickel sheet 230, when brazing the positive electrode 210 and the negative electrode 220, the use of the nickel sheet 230 can ensure that the current can pass smoothly through the positive electrode 210 and the negative electrode 220. To a certain extent, this can reduce the resistance and energy loss between the positive electrode 210 and the negative electrode 220, thereby ensuring the stability of the performance of both the positive electrode 210 and the negative electrode 220. At the same time, the good thermal conductivity helps to evenly transfer heat during the brazing process of the positive electrode 210 and the negative electrode 220, so that the brazing filler metal can melt quickly and evenly, thereby improving the brazing efficiency and brazing quality of the positive electrode 210 and the negative electrode 220.

[0097] It should also be noted that the surface of the nickel sheet 230 is easily wetted by the brazing filler metal and can form a good bond with various brazing fillers. This allows the nickel sheet 230 to form a reliable metallurgical bond with the positive electrode post 210, the negative electrode post 220 and the brazing filler metal during the brazing process, thereby obtaining a high-strength welded joint. This, to a certain extent, ensures the stability of the connection structure between the positive electrode post 210, the negative electrode post 220 and the nickel sheet 230.

[0098] Of course, in some other embodiments, the nickel sheet 230 may not be provided, and a copper-nickel composite sheet or a nickel-plated steel sheet may be provided instead.

[0099] It should be noted that when the positive electrode post 210 and the negative electrode post 220 are welded together by the nickel sheet 230, by connecting the connection point of the positive electrode post 210 and the negative electrode post 220 through the channel 212, it is beneficial to use the channel 212 to discharge the air generated during the welding of the positive electrode post 210 and the negative electrode post 220. This greatly prevents the air from expanding due to heat and forming an air gap on the welding surface of the positive electrode post 210 and the negative electrode post 220, thereby ensuring the welding quality of the positive electrode post 210 and the negative electrode post 220, and thus ensuring the welding yield of the positive electrode post 210 and the negative electrode post 220. This improves the connection quality of the two adjacent battery cells 100 and facilitates the improvement of the performance of the battery cell 1000.

[0100] In summary, the channel 212 of this application can not only improve the welding yield between the positive electrode post 210 and the negative electrode post 220, but also be used to detect the connection sealing performance between the positive electrode post 210, the negative electrode post 220 and the cover plate assembly 295, which facilitates the improvement of the sealing performance of the connection assembly 200, avoids the flow of electrolyte between two adjacent battery cells 100 in the battery cell 1000, and thus avoids short circuits between two adjacent battery cells 100, thereby ensuring the working performance of the battery cell 1000.

[0101] In some embodiments, the positive terminal 210 and the negative terminal 220 are mutually constrained. This allows the positive terminal 210 and the negative terminal 220 to be accurately positioned and connected to a certain extent, thereby ensuring the relative stability of the connection position between the positive terminal 210 and the negative terminal 220.

[0102] In some embodiments, combined with Figure 3 , Figure 4 and Figure 5 As shown, one of the positive electrode post 210 and the negative electrode post 220 is provided with a second groove 211, and at least a portion of the positive electrode post 210 and the negative electrode post 220 is limited and fitted within the second groove 211. This achieves a limited fit between the positive electrode post 210 and the negative electrode post 220, which improves the strength of the limited fit while reducing the difficulty of achieving the limited fit between the positive electrode post 210 and the negative electrode post 220.

[0103] By limiting and fitting at least a portion of one of the positive electrode post 210 and the negative electrode post 220 within the second groove 211, at least a portion of one of the positive electrode post 210 or the negative electrode post 220 can be wrapped by the inner wall of the second groove 211, thereby achieving the limiting and fitting of the positive electrode post 210 and the negative electrode post 220, which can reduce the difficulty of limiting and fitting the positive electrode post 210 and the negative electrode post 220.

[0104] It should be noted that the above-mentioned "one of the positive electrode post 210 and the negative electrode post 220 is provided with a second groove 211, and at least a portion of the positive electrode post 210 and the negative electrode post 220 is limited and matched within the second groove 211" means that when the positive electrode post 210 is provided with a second groove 211, at least a portion of the negative electrode post 220 is limited and matched within the second groove 211 of the positive electrode post 210; or, when the negative electrode post 220 is provided with a second groove 211, at least a portion of the positive electrode post 210 is limited and matched within the second groove 211 of the negative electrode post 220.

[0105] In specific examples, such as Figure 4 As shown, the negative electrode post 220 is provided with a second groove 211, and at least a portion of the positive electrode post 210 is limited and fitted in the second groove 211 of the negative electrode post 220 to achieve the limited fit between the positive electrode post 210 and the negative electrode post 220.

[0106] In some embodiments, such as Figure 4 As shown, one of the positive electrode post 210 and the negative electrode post 220 is provided with a limiting protrusion 221. In the installation direction of the positive electrode post 210 and the negative electrode post 220, the limiting protrusion 221 is located outside the second groove 211 and abuts against the end of the side wall of the second groove 211. This allows the positive electrode post 210 and the negative electrode post 220 to overlap, which to a certain extent avoids the positive electrode post 210 and the negative electrode post 220 from shifting relative to each other during welding. This ensures the stability and alignment of the positive electrode post 210 and the negative electrode post 220 after welding, and realizes the conduction of the positive electrode post 210 and the negative electrode post 220. In this way, multiple battery cells 100 can be safely and effectively connected in series using the connecting assembly 200, thereby improving the capacity and voltage of the battery cell 1000.

[0107] In a specific example, the positive electrode post 210 is provided with a second groove 211, and the negative electrode post 220 is provided with a limiting protrusion 221. At least a portion of the negative electrode post 220 is limited and fitted within the second groove 211, and the limiting protrusion 221 on the negative electrode post 220 is abutted and fitted with the end of the side wall of the second groove 211, so as to achieve the limiting fit between the positive electrode post 210 and the negative electrode post 220.

[0108] In other specific examples, such as Figure 4 As shown, the negative electrode post 220 is provided with a second groove 211, and the positive electrode post 210 is provided with a limiting protrusion 221. At least a portion of the positive electrode post 210 is limited and fitted within the second groove 211, and the limiting protrusion 221 on the positive electrode post 210 is abutted and fitted with the end of the side wall of the second groove 211, so as to realize the limiting fit between the positive electrode post 210 and the negative electrode post 220.

[0109] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 As shown, the cover plate assembly 295 includes a cover plate 240 and an insulating member 250. The cover plate 240 is provided with a second mounting hole 241. The insulating member 250 is sealed and connected in the second mounting hole 241. The insulating member 250 is provided with a first mounting hole 254. At least a portion of the positive terminal post 210 and at least a portion of the negative terminal post 220 are disposed in the first mounting hole 254 and are sealed and connected in the insulating member 250. This allows for the connection of the positive electrode 210 and the negative electrode 220 to the cover plate assembly 295, reducing the difficulty of connecting the positive electrode 210 and the negative electrode 220 to the cover plate assembly 295. It also facilitates the use of the cover plate assembly 295 to provide stable support for the positive electrode 210 and the negative electrode 220, ensuring the structural stability of the positive electrode 210 and the negative electrode 220 to a certain extent. This, in turn, ensures the stability of the relative position between the positive electrode 210 and the negative electrode 220, thus fixing the positive electrode 210 and the negative electrode 220.

[0110] Meanwhile, the first mounting hole 254 can provide a relatively accurate positioning for the positive terminal 210 and the negative terminal 220, so that the positive terminal 210 and the negative terminal 220 can maintain a certain relative position with the insulating component 250, so as to facilitate the subsequent assembly of other components of the battery unit 1000.

[0111] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 As shown, a sealed space 293 is formed between the positive electrode post 210, the negative electrode post 220, and the insulating component 250. This can be understood as follows: when the cover assembly 295 includes the insulating component 250, at least a portion of the channel 212 connects to the sealed space 293 between the positive electrode post 210, the negative electrode post 220, and the insulating component 250. This facilitates the detection of the connection seal between the positive electrode post 210, the negative electrode post 220, and the insulating component 250 using the channel 212, thereby achieving the goal of detecting the connection seal between the positive electrode post 210, the negative electrode post 220, and the cover assembly 295, and preventing electrolyte flow between adjacent battery cells 100 in the battery cell 1000.

[0112] In some embodiments, such as Figure 4As shown, the sealed space 293 includes a first spacer 292 and a second spacer 294 that are interconnected. The first spacer 292 is formed between one of the positive terminal 210 and the negative terminal 220 and the insulator 250. The second spacer 294 is formed between the other of the positive terminal 210 and the negative terminal 220 and the insulator 250. The channel 212 is directly opposite the first spacer 292 and / or the second spacer 294. By aligning the channel 212 with the first spacer 292 and / or the second spacer 294, the channel 212 can connect the first spacer 292 and / or the second spacer 294. Since the first spacer 292 and the second spacer 294 are interconnected, the channel 212 can simultaneously connect the first spacer 292 and the second spacer 294. Furthermore, since the first spacer 292 is formed between one of the positive terminal 210 and the negative terminal 220 and the insulator 250... The second gap space 294 is formed between the other of the positive terminal 210 and the negative terminal 220 and the insulating member 250. With the above arrangement, the sealing performance between the positive terminal 210 and the negative terminal 220 and the insulating member 250, as well as between the other of the positive terminal 210 and the negative terminal 220 and the insulating member 250, can be detected simultaneously by the connection 212, thereby achieving the purpose of detecting the sealing performance between the positive terminal 210, the negative terminal 220 and the cover plate assembly 295.

[0113] In some embodiments, combined with Figure 3 and Figure 4 As shown, one of the positive terminal 210 and the negative terminal 220 has a connecting portion 213, and the positive terminal 210 and the negative terminal 220 are connected to the insulating member 250 through the connecting portion 213. This achieves a fixed connection between the positive terminal 210 and the negative terminal 220 and the insulating member 250, and reduces the difficulty of fixing the positive terminal 210 and the negative terminal 220 to the insulating member 250.

[0114] In some embodiments, the connecting portion 213 is welded to one of the positive electrode post 210 and the negative electrode post 220 and the insulating member 250 respectively. The welding can also improve the sealing of the connection between one of the positive electrode post 210 and the negative electrode post 220 and the insulating member 250, and to a certain extent prevent the electrolyte from flowing out or circulating between two adjacent battery cells 100.

[0115] In some embodiments, one end of the connecting portion 213 is brazed and sealed to the insulating member 250, and the other end of the connecting portion 213 is through-welded or brazed and sealed to one of the positive electrode post 210 and the negative electrode post 220, so that one of the positive electrode post 210 and the negative electrode post 220 can be welded to the insulating member 250 through the connecting portion 213.

[0116] In specific examples, such as Figure 4 As shown, the positive terminal 210 is welded to the insulating component 250 via the connecting part 213.

[0117] Of course, in some other embodiments, the negative terminal 220 may also be welded to the insulating member 250 via the connecting portion 213 (not shown in this example figure).

[0118] In some embodiments, combined with Figure 3 and Figure 4 As shown, a first gap space 292 is formed between one of the positive terminal 210 and the negative terminal 220, the connecting portion 213, and the insulating member 250, with the channel 212 directly facing the first gap space 292. This facilitates the connection and communication between the channel 212 and the first gap space 292, allowing for the use of the channel 212 to inspect the weld seal between the connecting portion 213 and the insulating member 250, as well as the sealing performance of the weld seal between one of the positive terminal 210 and the negative terminal 220 and the connecting portion 213. This helps ensure the sealing performance of the connection between one of the positive terminal 210 and the negative terminal 220 and the insulating member 250, further guaranteeing the sealing performance of the connecting assembly 200.

[0119] In some embodiments, such as Figure 4 As shown, one of the positive terminal 210 and the negative terminal 220 has a stop portion 222, which is connected to the insulating member 250. At least a portion of the stop portion 222 is spaced apart from the insulating member 250 to form a second gap space 294. By connecting the stop portion 222 to the insulating member 250, the other of the positive terminal 210 and the negative terminal 220 can be fixedly connected to the insulating member 250, and the difficulty of fixing the other of the positive terminal 210 and the negative terminal 220 to the insulating member 250 can be reduced.

[0120] Meanwhile, by forming a second gap space 294 by at least partially separating the stop portion 222 from the insulating member 250, since the second gap space 294 is connected to the channel 212, it is beneficial to use the connection 212 to detect the sealing performance between the stop portion 222 and the insulating member 250, thereby achieving the purpose of detecting the sealing performance between the other of the positive terminal 210 and the negative terminal 220 and the insulating member 250, which facilitates ensuring the connection sealing performance between the other of the positive terminal 210 and the negative terminal 220 and the insulating member 250.

[0121] In some embodiments, the stop portion 222 is welded to the insulating member 250. The welding fit can also improve the sealing of the connection between the positive electrode post 210 and the negative electrode post 220 and the insulating member 250, and to a certain extent prevent the electrolyte from flowing out or circulating between two adjacent battery cells 100.

[0122] In summary, as Figure 4 As shown, one of the positive terminal 210 and the negative terminal 220 is welded to the insulating member 250 through the connecting part 213, and the other of the positive terminal 210 and the negative terminal 220 is welded to the insulating member 250 through the stop part 222, thereby realizing the connection between the positive terminal 210 and the negative terminal 220 and the insulating member 250, so that the insulating member 250 can provide stable support for the positive terminal 210 and the negative terminal 220.

[0123] In some embodiments, the stop portion 222 is brazed and sealed to the insulating member 250, which serves to fix and seal the other of the positive terminal post 210 and the negative terminal post 220 and the insulating member 250.

[0124] In specific examples, such as Figure 4 As shown, the negative electrode post 220 has a stop portion 222, and the negative electrode post 220 is welded to the insulating member 250 through the stop portion 222.

[0125] Of course, in some other embodiments, a stop portion 222 may be provided on the positive electrode post 210 to enable the positive electrode post 210 to be welded to the insulating member 250 through the stop portion 222 (not shown in this example figure).

[0126] In some embodiments, the stop portion 222 and the negative terminal post 220 are integrally formed to improve the positional stability of the stop portion 222, to a certain extent ensure the working performance of the stop portion 222, reduce the difficulty of fixing the stop portion 222 and the negative terminal post 220, and improve the connection sealing between the stop portion 222 and the negative terminal post 220.

[0127] In specific examples, such as Figure 4As shown, at least a portion of the positive electrode post 210 and at least a portion of the negative electrode post 220 are disposed within the first mounting hole 254. The positive electrode post 210 is welded to the insulating member 250 via a connecting portion 213. A first gap space 292 is formed between the positive electrode post 210, the connecting portion 213, and the insulating member 250. The negative electrode post 220 has a stop portion 222, which is connected to the insulating member 250. At least a portion of the stop portion 222 and the insulating member 250 are spaced apart to form a second gap space 294. The first gap space 292 and the second gap space 294 are spaced apart on opposite sides of the insulating member 250 in a first direction. The outer peripheral walls of at least a portion of the positive electrode post 210 and at least a portion of the negative electrode post 220 are flush with the first mounting hole 254. The inner peripheral wall of 4 is spaced apart to form a connection channel between the positive electrode post 210, the negative electrode post 220 and the insulating member 250. The first space 292 and the second space 294 are connected through the connection channel. When the channel 212 is set directly opposite the first space 292, the channel 212 can simultaneously connect the first space 292 and the second space 294. This facilitates the use of the channel 212 to detect the connection sealing between the positive electrode post 210 and the insulating member 250 and between the negative electrode post 220 and the insulating member 250, thereby achieving the purpose of detecting the sealing of the connection assembly 200. This helps to ensure the sealing of the connection assembly 200 and prevent the electrolyte from flowing out or circulating between two adjacent battery cells 100.

[0128] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 As shown, the insulating component 250 is mounted on the cover plate 240 through the second mounting hole 241. This allows the cover plate 240 to support the insulating component 250, thereby improving the working performance of the insulating component 250.

[0129] Meanwhile, since the positive electrode post 210 and the negative electrode post 220 are fixedly connected to the insulating component 250, by placing the insulating component 250 on the cover plate 240, the positive electrode post 210 and the negative electrode post 220 can also be placed on the cover plate 240, so that the cover plate 240 can support the positive electrode post 210 and the negative electrode post 220, improve the positional stability of the positive electrode post 210 and the negative electrode post 220, so that the cover plate 240 can provide stable support for the positive electrode post 210 and the negative electrode post 220, and to a certain extent, prevent the positive electrode post 210 and the negative electrode post 220 from shifting or shaking when the battery cell 1000 is subjected to external impact, thereby ensuring the structural stability of the positive electrode post 210 and the negative electrode post 220.

[0130] Furthermore, by sealing the insulating element 250 within the second mounting hole 241 and placing at least a portion of the positive terminal 210 and at least a portion of the negative terminal 220 within the first mounting hole 254, it is also possible to place the insulating element 250 between the positive terminal 210 and / or the negative terminal 220 and the cover plate 240. This means that the insulating component 250 is located between the positive terminal 210 and the cover plate 240; or, the insulating component 250 is located between the negative terminal 220 and the cover plate 240; or, the insulating component 250 is provided between the positive terminal 210 and the cover plate 240 and between the negative terminal 220 and the cover plate 240. The insulating component 250 can seal the positive terminal 210 and the cover plate 240 and the negative terminal 220 and the cover plate 240, thereby improving the sealing performance of the connection assembly 200. To a certain extent, it can prevent the electrolyte between two adjacent battery cells 100 from leaking to the positive terminal 210 and the cover plate 240 and the negative terminal 220 and the cover plate 240, and further prevent short circuits between adjacent battery cells 100, thereby ensuring the safety of the battery cell 1000.

[0131] The insulating component 250 mentioned here can be understood as an insulating ceramic ring.

[0132] In some embodiments, combined with Figure 3 and Figure 4 As shown, the connecting assembly 200 also includes a seal 260, and the insulator 250 is connected to the cover plate 240 through the seal 260. The seal 260 can seal the insulator 250 and the cover plate 240, thereby preventing electrolyte from flowing out through the second mounting hole 241 on the cover plate 240 between two adjacent battery cells 100 to a certain extent, thus preventing circuits between two adjacent battery cells 100 and ensuring the safety of the battery cell 1000.

[0133] In some embodiments, the seal 260 is a fixed sealing disc.

[0134] In some embodiments, the seal 260 is welded to the cover plate 240 and the insulator 250 respectively, so as to connect the seal 260 between the insulator 250 and the cover plate 240.

[0135] In a specific example, the seal 260 and the cover plate 240 are connected by a through-weld seal.

[0136] In some embodiments, such as Figure 4As shown, a first groove 251 is provided on one end of the insulating member 250. One of the positive electrode post 210 and the negative electrode post 220 is connected to the insulating member 250 to form a first connection 252. The sealing member 260 is connected to the insulating member 250 to form a second connection 253. The first connection 252 and the second connection 253 are located at the end of the insulating member 250 where the first groove 251 is provided. The first connection 252 and the second connection 253 are spaced apart on opposite sides of the first groove 251. This can be understood as follows: when one of the positive terminal 210 and the negative terminal 220, as well as the seal 260, are connected to the insulator 250, the connection points of one of the positive terminal 210 and the negative terminal 220, as well as the seal 260 and the insulator 250, are located on opposite sides of the first groove 251. The first groove 251 can not only separate the welding material on the first connection 252 and the second connection 253, but also accommodate some of the welding material, thereby preventing the first connection 252 and the second connection 253 from being electrically connected to each other, thus preventing one of the positive terminal 210 or the negative terminal 220 from being electrically connected to the seal 260.

[0137] Meanwhile, because it is located in the first groove 251, welding material can be applied to the first connection 252 and the second connection 253 at the same time, which simplifies the steps of applying welding material to the first connection 252 and the second connection 253 respectively, thereby improving the convenience of welding.

[0138] In specific examples, such as Figure 4 As shown, the positive electrode post 210 is connected to the insulating member 250 through the connecting part 213 to form a first connection 252, and the sealing member 260 is connected to the insulating member 250 to form a second connection 253. The first connection 252 and the second connection 253 are spaced apart on opposite sides of the first groove 251.

[0139] In summary, as Figure 4 As shown, the negative electrode post 220 is welded and sealed to the insulating component 250 through the stop part 222, the insulating component 250 is welded and sealed to the sealing component 260, and the sealing component 260 is welded and sealed to the cover plate 240. The positive electrode post 210 is welded and sealed to the insulating component 250 through the connecting part 213. To a certain extent, this can prevent the electrolyte in the two adjacent battery cells 100 from flowing out or circulating, and ensure the sealing of the connection assembly 200.

[0140] In some embodiments, such as Figure 4As shown, a third gap space 296 is formed between the first connection 252 and the second connection 253, and the third gap space 296 is arranged adjacent to the sealing space 293. In this way, even when the sealing space 293 is not completely sealed, it is convenient to use the channel 212 to detect the sealing performance of the third gap space 296, thereby ensuring the sealing connection quality between one of the positive terminal post 210 and the negative terminal post 220 and the insulating member 250, as well as between the sealing member 260 and the insulating member 250.

[0141] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 As shown, the connection assembly 200 also includes a positive electrode lead 270 and a negative electrode lead 280. The positive electrode lead 270 is connected to the positive electrode terminal 210, and the negative electrode lead 280 is connected to the negative electrode terminal 220. The positive electrode lead 270 reduces the difficulty of connecting the positive electrode tab and the positive electrode terminal 210, and the negative electrode lead 280 reduces the difficulty of connecting the negative electrode tab and the negative electrode terminal 220, thereby facilitating the electrical connection between two adjacent battery cells 100 using the connection assembly 200.

[0142] It should be noted that by setting up a positive electrode lead 270 and a negative electrode lead 280, compared with the prior art of directly connecting the electrode post and the electrode tab, the positive electrode lead 270 and the negative electrode lead 280 can reduce the difficulty of welding the positive electrode tab and the negative electrode tab to a certain extent, and greatly ensure that the positive electrode tab and the negative electrode tab have a good shape after welding.

[0143] In some embodiments, the two ends of the positive electrode lead 270 are connected to the positive electrode tab and the positive electrode post 210, respectively, and the two ends of the negative electrode lead 280 are connected to the negative electrode tab and the negative electrode post 220, respectively. This enables current conduction between the positive and negative electrodes of two adjacent battery cells 100, and allows multiple adjacent battery cells 100 to be connected in series, thereby increasing the capacity and voltage of the battery cell 1000 or battery pack.

[0144] In some embodiments, combined with Figure 3 and Figure 4As shown, the connecting assembly 200 also includes a first insulating plate 290 and a second insulating plate 291. The first insulating plate 290 is disposed between the cover plate assembly 295 and the positive electrode lead 270, and the second insulating plate 291 is disposed between the cover plate assembly 295 and the negative electrode lead 280. The first insulating plate 290 provides insulation between the positive electrode lead 270 and the cover plate assembly 295, and the second insulating plate 291 provides insulation between the cover plate assembly 295 and the negative electrode lead 280. This prevents short circuits between the positive electrode lead 270 and the cover plate assembly 295, and between the cover plate assembly 295 and the negative electrode lead 280, thereby ensuring the safety of the battery unit 1000.

[0145] In some embodiments, both the first insulating plate 290 and the second insulating plate 291 can be made of insulating materials such as polyamide, polycarbonate, polystyrene, phenolic resin or silicone rubber.

[0146] In some embodiments, such as Figure 2 As shown, the battery cell 100 includes a housing 110. Each housing 110 has an opening 111 at one end facing the adjacent housing 110. A cover assembly 295 is disposed at the opening 111 and is connected to the two adjacent housings 110 respectively. By providing the housing 110, stable support can be provided for the battery cell 100, greatly avoiding the impact of external impact forces on the battery cell 100 inside the housing 110, thereby improving the positional stability of the battery cell 100 and improving the working performance of the battery unit 1000.

[0147] Meanwhile, by configuring the cover assembly 295 to cooperate with and connect with two adjacent housings 110, the cover assembly 295 can connect two adjacent battery cells 100 in the battery cell 1000, which facilitates the series connection of two adjacent battery cells 100 and reduces the difficulty of connecting two adjacent battery cells 100.

[0148] In a specific example, each housing 110 has an opening 111 at one end facing the adjacent housing 110. The cover assembly 295 is located at the opening 111 and is connected to the two adjacent housings 110 respectively. In this way, in two adjacent battery cells 100, one end of the cover assembly 295 can be sealed to the housing 110 of one of the battery cells 100 and the other end of the cover assembly 295 can be sealed to the housing 110 of the other battery cell 100. Thus, each housing 110 can form a closed chamber, preventing external impurities from interfering with the normal operation of the battery cell 100, thereby ensuring the working performance of the battery cell 1000 to a certain extent.

[0149] In some embodiments, the housing 110 may be made of aluminum alloy so that the housing 110 can provide stable support for the battery cell 100 and, to a certain extent, ensure the structural stability of the entire battery cell 1000.

[0150] In some embodiments, such as Figure 4 and Figure 5 As shown, the cover assembly 295 has mating portions 242 on both opposite sides in the first direction, and the mating portions 242 are mated and connected with the corresponding outer shell 110. This enables the cover assembly 295 to be mated and connected with the outer shell 110, and to a certain extent reduces the difficulty of mating the cover assembly 295 and the corresponding outer shell 110.

[0151] In some embodiments, such as Figure 4 and Figure 5 As shown, the mating portion 242 is a mating recess formed on the cover plate assembly 295, and at least a portion of the outer shell 110 is disposed within the mating recess. This enables the cover plate assembly 295 to be mated and connected with the outer shell 110, and the mating recess can also position at least a portion of the outer shell 110, thereby enabling the cover plate assembly 295 to form a sealed mating connection with the outer shell 110.

[0152] Furthermore, by placing at least a portion of the outer casing 110 within the mating recess, at least a portion of the cover assembly 295 can be placed within the outer casing 110. This allows the outer casing 110 to easily protect components such as the positive terminal 210, negative terminal 220, and insulating component 250 during the placement or handling of the battery unit 1000. This, to a certain extent, prevents the positive terminal 210, negative terminal 220, and insulating component 250 in the connection assembly 200 from being directly subjected to force, thereby reducing the risk of breakage of the connection assembly 200 and extending the service life of the connection assembly 200 to a certain extent.

[0153] In a specific example, a mating step can be provided at the end of the cover plate 240 to form a mating recess, thereby reducing the difficulty of forming the mating recess.

[0154] In some embodiments, the cover plate 240 has a rounded corner between its sidewall in the first direction and the mating step, which can reduce the difficulty of mating the housing 110 and the cover plate 240.

[0155] In other embodiments, the mating portion 242 may also be a mating protrusion formed on the cover plate 240, which is disposed inside the housing 110 and abuts against the inner surface of the housing 110 (not shown in this example figure). That is, it is not limited to setting the mating portion 242 as a mating recess formed on the cover plate 240; the mating portion 242 may also be set as a mating protrusion formed on the cover plate 240. The mating protrusion can also achieve a limiting fit between the housing 110 and the cover plate 240, so that the cover plate 240 can fit tightly with the housing 110.

[0156] In some embodiments, the cover plate 240 is provided with mating plates on opposite sides in a first direction, the mating plates being formed as mating protrusions.

[0157] The battery cell 1000 of the present invention is described below with reference to the accompanying drawings.

[0158] Combination Figure 1 and Figure 2 As shown, a battery cell 1000 according to an embodiment of the present invention includes at least two battery cells 100 and a connecting assembly 200.

[0159] Among them, combined Figure 1 and Figure 2 As shown, at least two battery cells 100 are arranged opposite each other along a first direction. The connecting component 200 is the aforementioned connecting component 200. The specific structure of the connecting component 200 will not be described in detail here. The connecting component 200 is located between two adjacent battery cells 100.

[0160] As can be seen from the above structure, the battery cell 1000 of this embodiment of the invention can effectively connect two adjacent battery cells 100 by setting the connecting component 200, which facilitates the improvement of the capacity and space utilization of the battery cell 1000. At the same time, it can also prevent the electrolyte from flowing into the gaps of the positive electrode post 210, the negative electrode post 220 and the cover plate assembly 295, thereby preventing internal conduction between adjacent battery cells 100 and improving the performance of the battery cell 1000.

[0161] The battery assembly 2000 of the present invention is described below with reference to the accompanying drawings.

[0162] like Figure 1 As shown, the battery assembly 2000 according to an embodiment of the present invention includes a plurality of battery cells 1000.

[0163] Among them, battery unit 1000 is the aforementioned battery unit 1000, and the specific structure of battery unit 1000 will not be described in detail here.

[0164] According to the embodiments of the present invention, the battery assembly 2000, by employing the aforementioned battery cell 1000, can improve the working performance of the battery assembly 2000 to a certain extent and enhance the space utilization of the battery assembly 2000.

[0165] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0166] It should be noted that the battery component 2000 mentioned here can be understood as a battery module.

[0167] The battery pack of the present invention will now be described with reference to the accompanying drawings.

[0168] like Figure 1 As shown, the battery pack according to an embodiment of the present invention includes: a plurality of battery cells 1000 or battery assembly 2000.

[0169] Among them, battery unit 1000 is the aforementioned battery unit 1000, and battery assembly 2000 is the aforementioned battery assembly 2000. The specific structures of battery unit 1000 and battery assembly 2000 will not be described in detail here.

[0170] According to the embodiments of the present invention, by employing the aforementioned battery cell 1000 or the aforementioned battery assembly 2000, the battery pack can improve the capacity and space utilization of the battery pack and ensure the working performance of the battery pack.

[0171] In some embodiments, the battery pack includes a battery assembly 2000 and a housing, wherein the battery assembly 2000 is disposed within the housing.

[0172] The following describes the electrical device according to an embodiment of the present invention.

[0173] An electrical device according to an embodiment of the present invention includes a battery pack.

[0174] The battery pack is the same as described above, and its specific structure will not be elaborated here.

[0175] According to embodiments of the present invention, by employing the aforementioned battery pack, the working performance of the electrical device can be improved to a certain extent, and the requirement for efficient operation of the electrical device can be met.

[0176] It should be noted that 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.

[0177] 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.

[0178] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0179] Figure 1 and Figure 2 The above description shows a battery cell 1000 comprising two battery cells 100 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 with three, four or more battery cells 100, which also falls within the protection scope of this invention.

[0180] The specific structures of other components of the connection assembly 200, battery cell 1000, battery assembly 2000, battery pack, and power device according to embodiments of the present invention, such as the specific structure of the battery cell 100, are known to those skilled in the art and will not be described in detail here.

[0181] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, 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.

[0182] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A connection component, characterized in that, include: A cover plate assembly (295) is adapted to be disposed between two adjacent battery cells (100), and the cover plate assembly (295) is provided with a first mounting hole (254); The positive terminal (210) and the negative terminal (220) are interconnected. At least a portion of the positive terminal (210) and at least a portion of the negative terminal (220) are disposed in the first mounting hole (254) and are respectively connected to the cover plate assembly (295). In two adjacent battery cells (100), the positive terminal (210) is connected to the positive tab of one of the battery cells (100), and the negative terminal (220) is connected to the negative tab of the other battery cell (100). A sealed space (293) is formed between the positive electrode post (210), the negative electrode post (220) and the cover plate assembly (295). The positive electrode post (210) and / or the negative electrode post (220) are provided with a channel (212) that passes through it, and at least part of the channel (212) communicates with the sealed space (293).

2. The connection component according to claim 1, characterized in that, At least a portion of the channel (212) is connected to the external space of the connecting assembly at one end away from the sealed space (293).

3. The connection component according to claim 1, characterized in that, The cover plate assembly (295) includes a cover plate (240) and an insulating member (250). The cover plate (240) is provided with a second mounting hole (241). The insulating member (250) is sealed and connected in the second mounting hole (241). The insulating member (250) is provided with a first mounting hole (254). At least a portion of the positive electrode post (210) and at least a portion of the negative electrode post (220) are disposed in the first mounting hole (254) and sealed and connected in the insulating member (250). The positive electrode post (210), the negative electrode post (220) and the insulating member (250) enclose the sealed space (293).

4. The connection component according to claim 3, characterized in that, The sealed space (293) includes a first space (292) and a second space (294) that are interconnected. The first space (292) is formed between one of the positive terminal (210) and the negative terminal (220) and the insulating member (250). The second space (294) is formed between the other of the positive terminal (210) and the negative terminal (220) and the insulating member (250). The channel (212) is directly opposite the first space (292) and / or the second space (294).

5. The connecting component according to claim 4, characterized in that, One of the positive electrode post (210) and the negative electrode post (220) has a connecting portion (213). One of the positive electrode post (210) and the negative electrode post (220) is connected to the insulating member (250) through the connecting portion (213). The first interval space (292) is formed between one of the positive electrode post (210) and the negative electrode post (220), the connecting portion (213) and the insulating member (250). The channel (212) is directly opposite the first interval space (292).

6. The connecting component according to claim 4, characterized in that, The other of the positive terminal (210) and the negative terminal (220) has a stop portion (222) connected to the insulating member (250), and at least a portion of the stop portion (222) is spaced apart from the insulating member (250) to form the second gap space (294).

7. The connecting component according to claim 3, characterized in that, It also includes a seal (260), through which the insulating element (250) is connected to the cover plate (240).

8. The connection component according to claim 7, characterized in that, The insulating member (250) has a first groove (251) at one end. One of the positive electrode post (210) and the negative electrode post (220) is connected to the insulating member (250) to form a first connection (252). The sealing member (260) is connected to the insulating member (250) to form a second connection (253). The first connection (252) and the second connection (253) are located at the end of the insulating member (250) with the first groove (251). The first connection (252) and the second connection (253) are spaced apart on opposite sides of the first groove (251).

9. The connection component according to claim 8, characterized in that, A third gap space (296) is formed between the first connection (252) and the second connection (253), and the third gap space (296) is disposed adjacent to the sealing space (293).

10. The connecting component according to any one of claims 1-9, characterized in that, The channel (212) connects the positive terminal (210) and the negative terminal (220).

11. The connection component according to claim 10, characterized in that, The channel (212) includes a first channel (2121) and a second channel (2122). The first end of the second channel (2122) is connected to the sealed space (293), and the second end of the second channel (2122) is connected to the external space of the connecting assembly. The first channel (2121) is connected to the second channel (2122) and the connection between the positive terminal (210) and the negative terminal (220).

12. The connection component according to claim 1, characterized in that, It also includes a nickel sheet (230) disposed between the positive electrode post (210) and the negative electrode post (220), and the nickel sheet (230) is welded to the positive electrode post (210) and the negative electrode post (220) respectively.

13. The connection component according to claim 1, characterized in that, The positive electrode post (210) and the negative electrode post (220) are in a limiting fit.

14. The connection component according to claim 13, characterized in that, The other of the positive electrode post (210) and the negative electrode post (220) is provided with a second groove (211), and at least a portion of the positive electrode post (210) and the negative electrode post (220) is limited and fitted within the second groove (211).

15. The connection component according to claim 14, characterized in that, One of the positive electrode post (210) and the negative electrode post (220) is provided with a limiting protrusion (221). In the installation direction of the positive electrode post (210) and the negative electrode post (220), the limiting protrusion (221) is located outside the second groove (211) and abuts against the end of the side wall of the second groove (211).

16. The connection component according to claim 1, characterized in that, It also includes a positive electrode lead (270) and a negative electrode lead (280), wherein the positive electrode lead (270) is connected to the positive electrode post (210) and the negative electrode lead (280) is connected to the negative electrode post (220).

17. The connection component according to claim 16, characterized in that, It also includes a first insulating plate (290) and a second insulating plate (291), the first insulating plate (290) being disposed between the cover plate assembly (295) and the positive electrode lead-out piece (270), and the second insulating plate (291) being disposed between the cover plate assembly (295) and the negative electrode lead-out piece (280).

18. The connection component according to claim 1, characterized in that, The cover plate assembly (295) has mating parts (242) on both sides, and the mating parts (242) are mated and connected to the outer shell (110) of the corresponding battery cell.

19. The connection component according to claim 18, characterized in that, The mating portion (242) is a mating recess formed on the cover plate assembly (295), and at least a portion of the outer shell (110) is disposed within the mating recess.

20. A battery cell, characterized in that, include: At least two battery cells (100) are arranged opposite each other along a first direction; A connecting component, wherein the connecting component is any one of claims 1-19, and the connecting component is disposed between two adjacent battery cells (100).

21. The battery cell according to claim 20, characterized in that, The battery cell (100) includes a housing (110), each housing (110) having an opening (111) at one end facing the adjacent housing (110), and the cover assembly (295) is disposed at the opening (111) and is respectively connected to the two adjacent housings (110).

22. A battery assembly, characterized in that, It includes multiple battery cells as described in claim 20 or 21.

23. A battery pack, characterized in that, It includes a plurality of battery cells as claimed in claim 20 or 21; or, it includes a plurality of battery assemblies as claimed in claim 22.

24. An electrical appliance, characterized in that, Includes the battery pack according to claim 23.

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