Cover plate assembly, battery and electric equipment

Abstract

The utility model provides a cover plate assembly, a battery and electric equipment, and relates to the technical field of batteries, a cover plate body of the cover plate assembly comprises a first surface and a second surface, and the cover plate body is provided with a first through hole penetrating through the first surface and the second surface; the insulating ring is arranged on the second surface, and a second through hole corresponding to the first through hole is formed in the insulating ring; the leading-out terminal is arranged on one side, opposite to the cover plate body, of the insulating ring, and a third through hole is formed in the leading-out terminal; and the adapter is arranged in the third through hole and is electrically connected with the leading-out terminal, and the adapter is used for being electrically connected with a tab penetrating through the first through hole, the second through hole and the third through hole. According to the cover plate assembly, the use length of the tabs can be shortened, and short circuit between the positive and negative pole pieces caused by the tabs is avoided.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a cover plate assembly, a battery, and an electrical device. Background Technology

[0002] Batteries are used to provide electrical energy to electrical devices. A battery mainly consists of a casing, electrodes, tabs, and a cover. The casing has a cavity and a mounting port that connects to the cavity. The electrodes are located inside the casing. One end of the tab is connected to the end of the electrode facing the mounting port, and the other end of the tab is electrically connected to the lead-out terminal on the cover.

[0003] However, the batteries in the aforementioned related technologies have long tabs, which increases the manufacturing cost of the batteries, and the tabs are prone to causing short circuits between the positive and negative electrode plates inside the casing, affecting battery safety. Summary of the Invention

[0004] This application provides a cover plate assembly, a battery, and an electrical device to solve the technical problems in the above-mentioned related technologies, such as the long tabs in the battery increasing the manufacturing cost of the battery, and the tabs easily causing short circuits between the positive and negative electrodes inside the casing, affecting battery safety.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] A first aspect of this application provides a cover plate assembly, comprising:

[0007] The cover plate body includes a first surface and a second surface opposite each other along a first direction, and the cover plate body has a first through hole penetrating the first surface and the second surface;

[0008] An insulating ring is disposed on the second surface, and the insulating ring has a second through hole corresponding to the first through hole;

[0009] A lead-out terminal is provided on the side of the insulating ring facing away from the cover plate body, and the lead-out terminal has a third through hole;

[0010] An adapter is disposed within the third through hole and electrically connected to the lead-out terminal. The adapter is used to electrically connect the tabs passing through the first through hole, the second through hole, and the third through hole.

[0011] This application provides a cover plate assembly. By opening a first through hole on the cover plate body and a second through hole on the insulating ring, the lead terminal can be connected to the electrode tabs that pass through the first through hole, the second through hole and the third through hole in sequence. This can prevent the welding surface of the electrode tab and the lead terminal from being located inside the housing and can prevent welding slag from falling into the housing and causing a short circuit in the electrode core, thereby improving the safety of battery use.

[0012] Furthermore, the cover plate assembly uses an adapter in the third through hole to electrically connect the tab to the inner wall of the third through hole. Compared with the prior art method of leading the tab out of the shell and welding it to the cover plate, this application can shorten the length of the tab and reduce the material and manufacturing cost of the tab, thereby reducing the manufacturing cost of the battery.

[0013] Furthermore, by using an adapter, the impedance of the adapter can be lower than that of the tab, thereby reducing the impedance at the connection point with the lead-out terminal and improving battery performance. Moreover, by placing the adapter within the third through-hole of the lead-out terminal and connecting the tab to the lead-out terminal within this hole, compared to connecting the tab to the surface of the lead-out terminal facing away from the cover plate body after bending it, the tab does not protrude from the surface of the lead-out terminal in the first direction. It also prevents the tab from occupying the surface space of the lead-out terminal facing away from the cover plate body, thus avoiding the tab affecting the size of the cover plate assembly, the space utilization rate of the cover plate assembly, and consequently, the space utilization rate of the battery.

[0014] Based on the above technical solution, the following improvements can be made to this application.

[0015] In one possible implementation, the second surface of the cover plate body has a first groove, the bottom of which communicates with the first through hole;

[0016] The insulating ring is disposed within the first groove.

[0017] In one possible implementation, the insulating ring includes:

[0018] The first part is disposed in the first groove, and the lead-out terminal is disposed on the side of the first part facing away from the cover plate body. The first part is used to insulate the cover plate body and the lead-out terminal.

[0019] The second part is disposed on the inner circumferential side of the first through hole, and the second part is used to insulate the electrode tab located in the first through hole from the cover plate body;

[0020] The first part has a first through hole, and the second part has a second through hole corresponding to the first through hole, the first through hole and the second through hole together form the second through hole.

[0021] In one possible implementation, the end of the first portion facing the lead-out terminal does not protrude beyond the second surface of the cover body;

[0022] And / or, the end of the second portion facing away from the lead-out terminal does not protrude from the first surface of the cover body.

[0023] In one possible implementation, the adapter has a third surface extending along the first direction, the third surface being used for electrical connection with the tab within the third through hole.

[0024] In one possible implementation, the inner wall of the third through hole has a protrusion extending toward the center of the third through hole;

[0025] The adapter includes:

[0026] A first connecting portion extends along the first direction and has the third surface;

[0027] The second connecting part is disposed on the side of the first connecting part away from the third surface and extends toward the protrusion. The second connecting part is connected to the side of the protrusion away from the cover plate body.

[0028] In one possible implementation, the first connecting portion extends toward the insulating ring such that the third surface extends into the second through hole relative to the inner wall of the third through hole.

[0029] In one possible implementation, there is a gap between the surface of the protrusion facing the insulating ring and the surface of the insulating ring facing the lead-out terminal.

[0030] In one possible implementation, the dimension of the interval along the first direction is greater than or equal to 0.4 mm and less than or equal to 0.8 mm.

[0031] In one possible implementation, the insulating ring has a second groove on the side facing away from the cover plate body;

[0032] The lead-out terminal is disposed in the second groove.

[0033] One possible implementation also includes an end cap;

[0034] The lead-out terminal has a third groove on the side facing away from the cover plate body, and the bottom of the third groove communicates with the third through hole;

[0035] The end cap is disposed within the third groove.

[0036] One possible implementation also includes a spacer ring;

[0037] The spacer ring is disposed on the first surface of the cover plate body. The spacer ring is used to fix the electrode tab. The spacer ring has a fourth through hole through which the electrode tab can pass.

[0038] This application embodiment also provides a battery, which includes a casing, an electrode core assembly, and a cover plate assembly as described above;

[0039] The outer casing has a receiving cavity and a mounting port communicating with the receiving cavity;

[0040] The electrode assembly includes an electrode core and an electrode tab. The electrode core is disposed within the receiving cavity, and the electrode tab is disposed on the side of the electrode core facing the mounting port.

[0041] The electrode passes through the first through hole of the cover plate body of the cover plate assembly, the second through hole of the insulating ring, and the third through hole of the lead-out terminal. The electrode is electrically connected to the lead-out terminal through an adapter.

[0042] This application embodiment also provides an electrical device, which includes an electrical device and a battery as described above, the battery being used to provide electrical energy to the electrical device. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of a battery provided in an embodiment of this application;

[0045] Figure 2 for Figure 1 Exploded view of the local structure at point A;

[0046] Figure 3 for Figure 1 A cross-sectional view of the local mechanism at point A in the middle;

[0047] Figure 4 This is a schematic diagram of the cover plate body, insulating ring, and lead-out terminals provided in an embodiment of this application.

[0048] Explanation of reference numerals in the attached figures:

[0049] 10 - Battery; 20 - Cover assembly;

[0050] 100 - Housing;

[0051] 110 - Receiving cavity; 120 - Mounting port;

[0052] 200 - Cover plate body;

[0053] 210 - First surface; 220 - Second surface; 230 - First through hole; 240 - First groove;

[0054] 300 - Insulating Ring;

[0055] 310 - Second through hole; 320 - First part; 330 - Second part; 340 - Second groove;

[0056] 400-lead-out terminal;

[0057] 410 - Third through hole; 420 - Protrusion; 430 - Third groove;

[0058] 500-Adapter;

[0059] 510 - Third side; 520 - First connecting part; 530 - Second connecting part;

[0060] 600-interval;

[0061] 700-spacer;

[0062] 710 - Fourth through hole;

[0063] 800-core module;

[0064] 810 - Core; 820 - Tab;

[0065] 900-End Cap. Detailed Implementation

[0066] As described in the background section, existing batteries have relatively long tabs, increasing manufacturing costs and making them prone to short circuits between the positive and negative electrodes within the casing, thus affecting battery safety. This problem arises because in existing batteries, the tabs and leads are welded to the inner surface of the casing. After the cover assembly is installed with the casing, the welded surface is inside the casing, allowing weld slag to fall onto the electrode core inside, causing a short circuit.

[0067] In some batteries, the tabs are led out and bent so that the bent part of the tab is welded to the surface of the lead terminal facing away from the cover plate. In this way, the tab will occupy the space of the surface of the lead terminal facing away from the cover plate. Since other components need to be installed and connected on the surface of the lead terminal, and the tab occupies the space of this surface, in order to ensure that there is space for the installation of other components, the size of the lead terminal and the cover plate needs to be increased. When the size of the cover plate and the lead terminal increases, the size of the battery will also increase, which in turn leads to an increase in the space occupied by the battery.

[0068] To address the aforementioned technical problems, embodiments of this application provide a cover plate assembly, a battery, and an electrical device. The cover plate assembly has a first through hole on the cover plate body and a second through hole on the insulating ring, so that the lead-out terminals can be connected to the tabs that pass through the first through hole, the second through hole, and the third through hole in sequence. This avoids the welding surfaces of the tabs and the lead-out terminals being located inside the housing and prevents welding slag from falling into the housing and causing a short circuit in the electrode core, thereby improving the safety of battery use.

[0069] Furthermore, the cover plate assembly uses an adapter in the third through hole to electrically connect the tab to the inner wall of the third through hole. Compared with the prior art method of leading the tab out of the shell and welding it to the cover plate, this application can shorten the length of the tab and reduce the material and manufacturing cost of the tab, thereby reducing the manufacturing cost of the battery.

[0070] Furthermore, by using an adapter, the impedance of the adapter can be lower than that of the tab, thereby reducing the impedance at the connection point with the lead-out terminal and improving battery performance. Moreover, by placing the adapter within the third through-hole of the lead-out terminal and connecting the tab to the lead-out terminal within this hole, compared to connecting the tab to the surface of the lead-out terminal facing away from the cover plate body after bending it, the tab does not protrude from the surface of the lead-out terminal in the first direction. It also prevents the tab from occupying the surface space of the lead-out terminal facing away from the cover plate body, thus avoiding the tab affecting the size of the cover plate assembly, the space utilization rate of the cover plate assembly, and consequently, the space utilization rate of the battery.

[0071] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0072] refer to Figure 1 , Figure 2 and Figure 3 This application provides a cover plate assembly 20, which may include a cover plate body 200, an insulating ring 300, a lead-out terminal 400, and an adapter 500. The cover plate assembly 20 can be used in a battery 10 and can be combined with the housing 100 of the battery 10.

[0073] The cover body 200 may include a first direction (e.g. Figure 2 The cover plate body 200 has a first through hole 230 penetrating the first surface 210 and the second surface 220 (in the Z direction), through which the electrode tab 820 can pass. The cover plate body 200 can be a metal part, and the cover plate body 200 can be connected to the housing 100 by welding.

[0074] An insulating ring 300 is disposed on the second surface 220. The insulating ring 300 has a second through hole 310 corresponding to the first through hole 230. The second through hole 310 and the first through hole 230 are connected and both allow the tab 820 to pass through.

[0075] The lead-out terminal 400 is disposed on the side of the insulating ring 300 facing away from the cover plate body 200. The lead-out terminal 400 has a third through hole 410, which allows the tab 820 to pass through or accommodate the tab 820.

[0076] By setting the insulating ring 300, at least the lead-out terminal 400 and the cover plate body 200 can be insulated, thus preventing electrical connection between the lead-out terminal 400 and the cover plate body 200.

[0077] In some embodiments, the lead-out terminal 400 can be electrically connected to the tab 820 passing through the first through hole 230, the second through hole 310, and the third through hole 410. For example, the tab 820 can be electrically connected to the surface of the lead-out terminal 400 facing away from the cover plate body 200, or the tab 820 can be electrically connected to the inner wall of the third through hole 410 on the lead-out terminal 400. The tab 820 can be soldered to the lead-out terminal 400 to improve the connection stability between the lead-out terminal 400 and the tab 820.

[0078] This application provides a cover plate assembly 20, which provides a first through hole 230 on the cover plate body 200 and a second through hole 310 on the insulating ring 300, so that the lead terminal 400 can be connected to the tab 820 that passes through the first through hole 230, the second through hole 310 and the third through hole 410 in sequence. This avoids the welding surface of the tab 820 and the lead terminal 400 being located inside the housing 100, and also avoids welding slag falling into the housing 100 and causing the electrode core 810 to short circuit, thereby improving the safety of the battery 10.

[0079] If the tab 820 is directly welded to the inner wall of the third through hole 410, the size of the structural components such as the lead terminal 400 is relatively small, and the size of the third through hole 410 is also relatively small. When the tab 820 is directly welded to the inner wall of the second through hole 310, the connection area between the tab 820 and the inner wall of the third through hole 410 is small, which results in a relatively high impedance at the connection point, affecting the power consumption and performance of the battery 10.

[0080] refer to Figure 2 and Figure 3The cover plate assembly 20 of this application also includes an adapter 500, which is disposed in the third through hole 410 and electrically connected to the lead-out terminal 400. The adapter 500 is used to electrically connect the tab 820 passing through the first through hole 230, the second through hole 310 and the third through hole 410, so that the lead-out terminal 400 and the tab 820 are electrically connected through the adapter 500.

[0081] In this way, by setting an adapter 500 in the third through hole 410 and electrically connecting the tab 820 and the inner wall of the third through hole 410 through the adapter 500, compared with the prior art of leading the tab out of the shell and welding it to the cover plate, this application can shorten the length of the tab 820 and reduce the material and manufacturing cost of the tab 820, thereby reducing the manufacturing cost of the battery 10.

[0082] Furthermore, by using the adapter 500, the impedance of the adapter 500 can be less than the impedance of the tab 820, thereby reducing the impedance at the connection point with the lead-out terminal 400 and improving the performance of the battery 10. Moreover, by placing the adapter 500 within the third through-hole 410 of the lead-out terminal 400 and connecting the tab 820 to the lead-out terminal 400 within the third through-hole 410, compared to connecting the tab 820 to the surface of the lead-out terminal 400 facing away from the cover plate body 200 after bending it, the tab 820 does not protrude from the surface of the lead-out terminal 400 in the first direction, and it also does not occupy the space of the surface of the lead-out terminal 400 facing away from the cover plate body 200. This prevents the tab 820 from affecting the size of the cover plate assembly 20, avoids affecting the space occupancy rate of the cover plate assembly 20, and ultimately prevents the cover plate assembly 20 from affecting the space occupancy rate of the battery 10.

[0083] In some embodiments, the tab 820 can be a positive tab or a negative tab, and the first through hole 230, the second through hole 310 and the third through hole 410 can allow the positive tab to pass through or allow the negative tab to pass through.

[0084] refer to Figure 2 and Figure 3 In some embodiments, the second surface 220 of the cover plate body 200 has a first groove 240, the bottom of the first groove 240 is connected to the first through hole 230, and the insulating ring 300 is disposed in the first groove 240.

[0085] In this way, by placing the insulating ring 300 inside the first groove 240, the height of the insulating ring 300 protruding from the second surface 220 can be reduced, thereby reducing the space occupied by the insulating ring 300 on the cover plate assembly 20 in the first direction, thereby reducing the volume of the cover plate assembly 20 and reducing the space occupied by the cover plate assembly 20 in the first direction.

[0086] refer to Figure 2 and Figure 3 In some embodiments, the insulating ring 300 may include a first portion 320 and a second portion 330.

[0087] The first part 320 is disposed in the first groove 240 and is connected to the bottom wall of the first groove 240. The lead-out terminal 400 is disposed on the side of the first part 320 facing away from the cover plate body 200. The first part 320 is used to insulate the cover plate body 200 and the lead-out terminal 400.

[0088] Thus, by placing the first portion 320 within the first recess 240, the impact of the first portion 320 on the space occupied by the cover plate assembly 20 in the first direction can be reduced. The first portion 320 is located between the lead-out terminal 400 and the cover plate body 200, and the first portion 320 can be used to insulate between the lead-out terminal 400 and the cover plate body 200.

[0089] In some embodiments, the insulating ring 300 can be a ceramic insulating component. The insulating ring 300 is welded to the cover plate body 200 by welding, and the insulating ring 300 can also be connected to the lead-out terminal 400 by welding.

[0090] The second part 330 is disposed on the inner peripheral side of the first through hole 230. The second part 330 is used to insulate the tab 820 located in the first through hole 230 from the cover plate body 200.

[0091] The first part 320 has a first through hole (not shown in the figure), and the second part 330 has a second through hole (not shown in the figure) corresponding to the first through hole. The first through hole and the second through hole together form a second through hole 310.

[0092] In this way, by setting the second part 330 on the inner circumferential side of the first through hole 230, when the tab 820 is inserted into the first through hole 230, the second part 330 of the insulating ring 300 can prevent the tab 820 in the first through hole 230 from directly contacting the inner wall of the first through hole 230, thereby preventing the tab 820 from being electrically connected to the inner wall of the first through hole 230, and thus achieving insulation between the cover plate body 200 and the tab 820.

[0093] In some embodiments, the first part 320 and the second part 330 can be an integral structure, which can reduce the number of parts in the cover plate assembly 20 and improve the assembly efficiency of the cover plate assembly 20.

[0094] refer to Figure 2 and Figure 3In some embodiments, the end of the first portion 320 facing the lead-out terminal 400 does not protrude beyond the second surface 220 of the cover body 200. For example, the end of the first portion 320 facing the lead-out terminal 400 may be flush with the second surface 220 of the cover body 200, or the end of the first portion 320 facing the lead-out terminal 400 may be lower than the second surface 220 of the cover body 200.

[0095] In this way, by ensuring that the end of the first portion 320 facing the lead-out terminal 400 does not protrude beyond the second surface 220 of the cover body 200, the end of the insulating ring 300 facing the lead-out terminal 400 does not protrude beyond the second surface 220 of the cover body 200. This avoids increasing the size of the cover assembly 20 in the first direction due to the insulating ring 300 protruding beyond the second surface 220, thereby reducing the volume of the cover assembly 20 in the first direction and reducing the impact of the insulating ring 300 on the space occupied by the cover assembly 20.

[0096] In other embodiments, the second portion 330 of the insulating ring 300 does not protrude beyond the first surface 210 of the cover body 200 at one end opposite to the lead-out terminal 400. For example, the end of the second portion 330 opposite to the lead-out terminal 400 may be lower than the first surface 210 of the cover body 200, or the end of the second portion 330 opposite to the lead-out terminal 400 may be flush with the first surface 210 of the cover body 200.

[0097] In this way, by ensuring that the end of the second part 330 facing away from the lead-out terminal 400 does not protrude from the first surface 210 of the cover plate body 200, the end of the insulating ring 300 facing away from the lead-out terminal 400 does not protrude from the first surface 210 of the cover plate body 200. This avoids increasing the size of the cover plate assembly 20 in the first direction due to the second part 330 protruding from the first surface 210, thereby reducing the volume of the cover plate assembly 20 in the first direction and reducing the impact of the insulating ring 300 on the space occupied by the cover plate assembly 20.

[0098] In an exemplary embodiment, the thickness of the cover body 200 along the first direction can be the same as the thickness of the insulating ring 300, so that the end of the first portion 320 facing the lead-out terminal 400 is flush with the second surface 220 of the cover body 200, and the end of the second portion 330 facing away from the lead-out terminal 400 is flush with the first surface 210 of the cover body 200.

[0099] refer to Figure 2 and Figure 3In some embodiments, the adapter 500 has a third surface 510 extending along a first direction, the third surface 510 being used for electrical connection with a tab 820 within a third through hole 410. The third surface 510 can be located within the third through hole 410, and the upper edge of the third surface 510 facing away from the cover plate body 200 can not protrude beyond the end of the third through hole 410 facing away from the cover plate body 200, thereby preventing the adapter block from protruding beyond the end of the third through hole 410 facing away from the cover plate body 200 and preventing the adapter 500 from occupying volume of the cover plate assembly 20 along the first direction.

[0100] Furthermore, by connecting the tab 820 to the third surface 510 extending along the first direction on the adapter 500, it is possible to avoid bending the tab 820 before connecting it to the surface of the lead-out terminal 400 facing away from the cover plate body 200. This also prevents the tab 820 from occupying space on the surface of the lead-out terminal 400 facing away from the cover plate. When the tab 820 is connected to the surface of the lead-out terminal 400 facing away from the cover plate body 200, it is possible to avoid increasing the size of the lead-out terminal 400 due to insufficient installation space on the surface of the lead-out terminal 400 facing away from the cover plate body 200. This avoids increasing the size of the cover plate assembly 20 and reduces the space occupancy rate of the cover plate assembly 20.

[0101] refer to Figure 2 and Figure 3 In some embodiments, the inner wall of the third through hole 410 has a protrusion 420 extending toward the center of the third through hole 410.

[0102] The adapter 500 may include a first connecting portion 520 and a second connecting portion 530. The first connecting portion 520 extends along a first direction and has a third surface 510. The second connecting portion 530 is disposed on the side of the first connecting portion 520 opposite to the third surface 510 and extends toward the protrusion 420. The second connecting portion 530 is connected to the side of the protrusion 420 opposite to the cover plate body 200.

[0103] In this way, by connecting the second connecting part 530 to the protrusion 420, the second connecting part 530 can overlap the protrusion 420 in the first direction, and the second connecting part 530 and the protrusion 420 can be connected by welding at the overlapping surface, thereby improving the connection stability between the lead-out terminal 400 and the adapter 500.

[0104] In some embodiments, the first connecting portion 520 extends toward the insulating ring 300 such that the third surface 510 extends into the second through hole 310 relative to the inner sidewall of the third through hole 410.

[0105] In this way, by extending the third surface 510 on the first connecting portion 520 into the second through hole 310 of the insulating ring 300, the size of the third surface 510 in the first direction can be increased, thereby increasing the connection area between the tab 820 and the third surface 510, improving the connection stability between the adapter 500 and the tab 820, and improving the overcurrent capacity at the connection between the adapter 500 and the tab 820, reducing power loss, and improving the performance of the battery 10.

[0106] refer to Figure 3 In some embodiments, the end of the lead-out terminal 400 facing the insulating ring 300 has a connecting surface for connecting with the insulating ring 300, and a protrusion 420 is disposed close to the connecting surface. The lead-out terminal 400 and the insulating ring 300 can be connected at the connecting surface by welding. There is a gap of 600 between the surface of the protrusion 420 facing the insulating ring 300 and the surface of the insulating ring 300 facing the lead-out terminal 400.

[0107] Thus, by providing a gap 600 between the protrusion 420 and the insulating ring 300, the protrusion 420 can absorb welding stress through slight deformation during the welding process between the lead terminal 400 and the insulating ring 300, thereby preventing the insulating ring 300 from deforming and cracking due to the welding process. For example, if the insulating ring 300 is a ceramic insulating component, providing a gap 600 between the protrusion 420 and the insulating ring 300 can prevent the ceramic insulating component from cracking and being damaged during the welding process.

[0108] refer to Figure 3 In some embodiments, the interval 600 is along the first direction (e.g., Figure 3 Dimensions in the Z-direction (e.g.) Figure 3 The dimension H of the spacing 600 between the protrusions 420 and the insulating rings 300 along the first direction can be one of 0.4mm, 0.5mm, 0.6mm, 0.7mm, and 0.8mm. Alternatively, the dimension H of the spacing 600 between the protrusions 420 and the insulating rings 300 along the first direction can be any value within the range of 0.4mm and 0.8mm.

[0109] In this way, by making the dimension H of the interval 600 along the first direction greater than 0.4 mm, it is possible to avoid the protrusion 420 on the lead terminal 400 being unable to fully absorb welding stress through deformation due to the distance being too small. On the other hand, by making the dimension H of the interval 600 along the first direction less than 0.8 mm, it is possible to avoid the cover plate assembly 20 being too large in the first direction due to the distance being too large. Thus, it is possible to ensure that the protrusion 420 of the lead terminal 400 fully absorbs welding stress while avoiding the cover plate assembly 20 being too large.

[0110] refer to Figure 3 and Figure 4 In some embodiments, the insulating ring 300 has a second groove 340 on the side facing away from the cover plate body 200, and the lead-out terminal 400 is disposed in the second groove 340.

[0111] In this way, by placing the lead-out terminal 400 within the second groove 340, the lead-out terminal 400 can be restricted in the second direction (e.g., Figure 3 The displacement in the X direction (the second direction is perpendicular to the first direction) improves the connection stability between the lead-out terminal 400 and the insulating ring 300, thereby improving the structural stability of the cover plate assembly 20.

[0112] Furthermore, by placing the lead-out terminal 400 within the second groove 340 on the insulating ring 300, the size of the lead-out terminal 400 protruding from the insulating ring 300 in the first direction can be reduced, thereby reducing the space occupied by the lead-out terminal 400 on the cover plate assembly 20 in the first direction and reducing the space occupancy rate of the cover plate assembly 20.

[0113] refer to Figure 3 and Figure 4 In some embodiments, an end cap 900 may also be included. The lead-out terminal 400 has a third groove 430 on the side facing away from the cover plate body 200. The bottom of the third groove 430 communicates with the third through hole 410. The end cap 900 is disposed in the third groove 430.

[0114] In this way, by placing the end cap 900 in the third groove 430 of the lead-out terminal 400, the movement of the end cap 900 in the second direction can be reduced, and the connection stability between the lead-out terminal 400 and the end cap 900 can be improved.

[0115] Furthermore, by placing the end cap 900 within the third groove 430, the size of the end cap 900 relative to the cover plate assembly 20 in the first direction can be reduced, thereby reducing the space occupied by the end cap 900 relative to the cover plate assembly 20 in the first direction.

[0116] In some embodiments, end cap 900 is either a positive terminal cap or a negative terminal cap. If lead terminal 400 is soldered to a positive terminal tab, end cap 900 is a positive terminal cap; if lead terminal 400 is soldered to a negative terminal tab, end cap 900 is a negative terminal cap.

[0117] refer to Figure 2 and Figure 3 In some embodiments, a spacer 700 may also be included. The spacer 700 is disposed on the first surface 210 of the cover plate body 200. The spacer 700 is used to fix the tab 820. The spacer 700 has a fourth through hole 710 through which the tab 820 can pass.

[0118] In this way, by setting the spacer 700, the tab 820 can be fixed by the spacer 700. Furthermore, the spacer 700 can also be used to insulate the first surface 210 of the cover plate body 200 from the tab 820.

[0119] refer to Figure 1 and Figure 2 This application embodiment also provides a battery 10, which may include a casing, an electrode core assembly 800, and the aforementioned cover plate assembly 20.

[0120] The housing has a receiving cavity 110 and a mounting port 120 communicating with the receiving cavity 110. The electrode core assembly 800 may include an electrode core 810 and an electrode tab 820. The electrode core 810 is disposed in the receiving cavity 110, and the electrode tab 820 is disposed on the side of the electrode core 810 facing the mounting port 120.

[0121] The tab 820 passes through the first through hole 230 of the cover plate body 200 of the cover plate assembly 20, the second through hole 310 of the insulating ring 300 and the third through hole 410 of the lead-out terminal 400, and the tab 820 is electrically connected to the lead-out terminal 400 through the adapter 500.

[0122] Thus, by using the cover assembly 20 described above, the battery 10 of this embodiment can shorten the service life of the tab 820, save materials used in the tab 820, and reduce the manufacturing cost of the battery 10. Furthermore, since the tab 820 is connected to the lead terminal 400 via the adapter 500 when connected, the impedance is reduced, the overcurrent capacity at the connection between the tab 820 and the lead terminal 400 is increased, the power consumption of the battery 10 is reduced, and the battery's range is improved.

[0123] This application embodiment also provides an electrical device, which may include an electrical appliance and the aforementioned battery, the battery being used to provide electrical energy to the electrical appliance.

[0124] This application provides an electrical device that, by using the aforementioned battery, can reduce the manufacturing cost of the electrical device, reduce its power consumption, and improve its battery life.

[0125] In some embodiments, the electrical equipment can be a vehicle or an energy storage device. The vehicle can be a new energy vehicle, such as a pure electric vehicle (PEV / BEV), a range-extended electric vehicle (REEV), a hybrid electric vehicle (HEV), or a fuel cell electric vehicle. The vehicle can also be any vehicle equipped with a battery.

[0126] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0127] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0128] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0129] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0130] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A cover plate assembly (20), characterized in that, include: The cover body (200) includes a first surface (210) and a second surface (220) opposite each other along a first direction, and the cover body (200) has a first through hole (230) penetrating the first surface (210) and the second surface (220); An insulating ring (300) is disposed on the second surface (220), and the insulating ring (300) has a second through hole (310) corresponding to the first through hole (230); A lead-out terminal (400) is disposed on the side of the insulating ring (300) facing away from the cover plate body (200), and the lead-out terminal (400) is provided with a third through hole (410); An adapter (500) is disposed in the third through hole (410) and electrically connected to the lead-out terminal (400). The adapter (500) is used to electrically connect the tab (820) passing through the first through hole (230), the second through hole (310) and the third through hole (410).

2. The cover plate assembly (20) according to claim 1, characterized in that The second surface (220) of the cover plate body (200) has a first groove (240), and the bottom of the first groove (240) communicates with the first through hole (230); The insulating ring (300) is disposed in the first groove (240).

3. The cover plate assembly (20) of claim 2, wherein, The insulating ring (300) includes: The first part (320) is disposed in the first groove (240), and the lead-out terminal (400) is disposed on the side of the first part (320) facing away from the cover plate body (200). The first part (320) is used to insulate the cover plate body (200) and the lead-out terminal (400). The second part (330) is disposed on the inner circumferential side of the first through hole (230), and the second part (330) is used to insulate the electrode tab (820) located in the first through hole (230) from the cover plate body (200); The first part (320) has a first through hole, and the second part (330) has a second through hole corresponding to the first through hole. The first through hole and the second through hole together form the second through hole (310).

4. The cover plate assembly (20) of claim 3, wherein, The end of the first portion (320) facing the lead-out terminal (400) does not protrude from the second surface (220) of the cover body (200); And / or, the end of the second portion (330) facing away from the lead-out terminal (400) does not protrude from the first surface (210) of the cover body (200).

5. The cover plate assembly (20) according to claim 1, characterized in that, The adapter (500) has a third surface (510) extending along the first direction, the third surface (510) being used for electrical connection with the tab (820) within the third through hole (410).

6. The cover plate assembly (20) of claim 5, wherein, The inner wall of the third through hole (410) has a protrusion (420) extending toward the center of the third through hole (410); The adapter (500) includes: The first connecting portion (520) extends along the first direction and has the third surface (510); The second connecting part (530) is disposed on the side of the first connecting part (520) facing away from the third surface (510) and extends toward the protrusion (420). The second connecting part (530) is connected to the side of the protrusion (420) facing away from the cover plate body (200).

7. The cover plate assembly (20) of claim 6, characterized by The first connecting portion (520) extends toward the insulating ring (300) such that the third surface (510) extends into the second through hole (310) relative to the inner wall of the third through hole (410).

8. The cover plate assembly (20) according to claim 6, characterized in that, There is a gap (600) between the surface of the protrusion (420) facing the insulating ring (300) and the surface of the insulating ring (300) facing the lead-out terminal (400).

9. The cover plate assembly (20) of claim 8, characterized in that The dimension of the interval (600) along the first direction is greater than or equal to 0.4 mm and less than or equal to 0.8 mm.

10. The cover plate assembly (20) of claim 1, wherein, The insulating ring (300) has a second groove (340) on the side facing away from the cover plate body (200); The lead-out terminal (400) is disposed in the second groove (340).

11. The cover plate assembly (20) according to any one of claims 1-10, characterized in that It also includes end caps (900); The lead-out terminal (400) has a third groove (430) on the side facing away from the cover plate body (200), and the bottom of the third groove (430) is connected to the third through hole (410); The end cap (900) is disposed within the third groove (430).

12. The cover plate assembly (20) according to any one of claims 1-10, characterized in that It also includes spacers (700); The spacer ring (700) is disposed on the first surface (210) of the cover plate body (200). The spacer ring (700) is used to fix the electrode tab (820). The spacer ring (700) has a fourth through hole (710) through which the electrode tab (820) can pass.

13. A battery (10), characterized in that, It includes a housing, an electrode core assembly (800), and a cover plate assembly (20) as described in any one of claims 1-12; The outer casing has a receiving cavity (110) and a mounting port (120) communicating with the receiving cavity (110); The electrode assembly (800) includes an electrode (810) and an electrode tab (820). The electrode (810) is disposed in the receiving cavity (110), and the electrode tab (820) is disposed on the side of the electrode (810) facing the mounting port (120). The tab (820) passes through the first through hole (230) of the cover body (200) of the cover plate assembly (20), the second through hole (310) of the insulating ring (300) and the third through hole (410) of the lead-out terminal (400), and the tab (820) is electrically connected to the lead-out terminal (400) through the adapter (500).

14. An electrical device, characterized by It includes an electrical device and a battery (10) as claimed in claim 13, the battery (10) being used to provide electrical energy to the electrical device.

Images