Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment, and relates to the technical field of batteries, a shell of the battery is provided with a containing cavity and a mounting opening, a cover plate covers the mounting opening, the cover plate is provided with a first through hole penetrating through the cover plate in the first direction, and a leading-out terminal is arranged on the side, opposite to the shell, of the cover plate; the leading-out terminal is provided with a second through hole penetrating through the leading-out terminal in the first direction, the pole core assembly is arranged in the containing cavity and comprises a pole lug and a pole core, the pole lug comprises an extending part and a folding part which are connected with each other, and the folding part is connected with the side, facing the cover plate, of the pole core. The extending part penetrates through the first through hole and the second through hole and is electrically connected with the surface, opposite to the cover plate, of the leading-out terminal, the insulating film is arranged on the outer side of the pole core, a first bending part is formed at the end part of one side, facing the cover plate, of the insulating film, the first bending part covers the folding part, and the folding part is insulated from the shell through the first bending part. The battery provided by the utility model can prevent welding slag from falling into the shell to cause short circuit, and can shorten the length of the tabs.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to 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, in the aforementioned related technologies, the welding slag generated during the welding process between the tabs and the lead terminals in the battery can fall into the electrode core, causing a short circuit inside the battery. The tabs are also relatively long, which affects the manufacturing cost of the battery. Utility Model Content

[0004] This application provides a battery and electrical device to solve the technical problems in the above-mentioned related technologies, such as the welding slag generated during the welding process of the tabs and lead terminals in the battery falling into the electrode core, causing a short circuit inside the battery, and the long length of the tabs affecting the manufacturing cost of the battery.

[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 battery comprising:

[0007] The housing has a receiving cavity and a mounting port communicating with the receiving cavity;

[0008] A cover plate is provided on the mounting opening, the cover plate having a first through hole penetrating the cover plate in a first direction;

[0009] A lead-out terminal is disposed on the side of the cover plate facing away from the housing, and the lead-out terminal has a second through hole penetrating the lead-out terminal along the first direction;

[0010] An electrode assembly is disposed within the receiving cavity, and the electrode assembly includes an electrode tab and an electrode core.

[0011] The electrode tab includes an extension and a retractable portion connected to each other. The retractable portion is connected to the side of the electrode core facing the cover plate. The extension passes through the first through hole and the second through hole and is electrically connected to the lead-out terminal on the surface facing away from the cover plate.

[0012] An insulating film is disposed on the outside of the electrode core. The end of the insulating film facing the cover plate has a first bend. The first bend covers at least part of the folded portion. The first bend is used to insulate the folded portion from the housing.

[0013] This application provides a battery in which a first through hole is made in the cover plate and a second through hole is made in the lead terminal, so that the extension of the tab can pass through the first through hole and the second through hole in sequence, and the extension of the tab is electrically connected to the surface of the lead terminal facing away from the cover plate. Compared with the method of welding the tab and the lead terminal to the side facing the electrode core, since the connection between the tab and the lead terminal is located outside the shell, it can avoid foreign objects such as welding slag generated during the welding process from falling into the electrode core inside the shell, thereby avoiding the problem of short circuit in the electrode core caused by welding slag and other foreign objects. Furthermore, it can eliminate the step of using tape to seal the weld between the tab and the lead terminal to prevent welding slag from falling off, thus improving the production efficiency of the battery.

[0014] Furthermore, compared to the existing technology that first pulls the tab out of the housing and welds it to the lead terminal, and then bends the welded tab and puts it into the housing, this application allows the tab to pass directly through the first and second through holes and connect to the lead terminal. Since it is no longer necessary to pull the tab out of the housing, the usage distance of the tab can be shortened, thereby reducing the amount of material used to make the tab in the battery, thus reducing the manufacturing cost of the tab and the battery.

[0015] Furthermore, by providing an insulating film on the outside of the electrode core, the insulating film can be positioned between the inner wall of the receiving cavity and the electrode core, thereby achieving insulation between the electrode core and the casing and improving the battery's safety. Moreover, by forming a first bend at the end of the insulating film facing the cover plate, and ensuring that the first bend at least partially covers the folded portion, insulation can be achieved between the folded portion of the electrode tab and the casing, preventing short circuits between the folded portion and the casing and further improving the battery's safety.

[0016] Based on the above technical solution, the following improvements can be made to this application.

[0017] In one possible implementation, the cover plate includes;

[0018] The cover plate body includes a first surface and a second surface opposite to each other along the first direction, the first surface facing the lead-out terminal, and the cover plate body having the first through hole;

[0019] An insulating member includes a first insulating portion disposed on the first surface, and the insulating member has a third through hole communicating with the first through hole;

[0020] The extension passes through the first through hole and the third through hole in sequence and is electrically connected to the lead-out terminal.

[0021] In one possible implementation, the insulating element and the cover plate body are integrally injection molded;

[0022] Alternatively, the insulating component, the cover plate body, and the lead-out terminal are integrally injection molded.

[0023] In one possible implementation, the insulating member further includes a second insulating portion disposed on the second surface of the cover plate body, the second insulating portion having a fourth through hole communicating with the first through hole, the fourth through hole allowing the extension of the electrode tab to pass through;

[0024] The second insulating portion is used to insulate the cover plate body from the retractable portion of the electrode tab.

[0025] In one possible implementation, the second insulating portion includes a first boss extending toward the pole core, the first boss abutting the end of the pole core toward the cover plate body.

[0026] In one possible implementation, the second insulating portion further includes a second boss extending toward the pole core;

[0027] The second protrusion and the first protrusion are arranged at intervals along the second direction, the electrode lug is located between the first protrusion and the second protrusion, and the second protrusion abuts against the end of the electrode core facing the cover plate body;

[0028] The second direction is perpendicular to the first direction.

[0029] In one possible implementation, the insulating element further includes a third insulating portion;

[0030] The third insulating portion is disposed on the inner sidewall of the first perforation, and the third insulating portion insulates the extension portion from the cover plate body.

[0031] In one possible implementation, at least one second bend is formed at the end of the insulating film facing the cover plate.

[0032] The second bend covers at least a portion of the surface of the electrode core facing the cover plate, the cover plate and the electrode core together clamp the second bend, and the second bend serves to insulate the electrode core from the cover plate.

[0033] In one possible implementation, along a second direction, the size of the first bend is larger than the size of the gather, and the second direction is perpendicular to the first direction.

[0034] In one possible implementation, along the second direction, the difference between the size of the first bending portion and the size of the gathered portion is greater than or equal to 2 mm and less than or equal to 5 mm.

[0035] In one possible implementation, along the first direction, the size of the first bend is larger than the size of the second bend.

[0036] In one possible implementation, the extension includes interconnected straight segments and bent segments;

[0037] The straight segment passes through the first and second through holes, and the bent segment is electrically connected to the surface of the lead-out terminal facing away from the cover plate.

[0038] In one possible implementation, the lead-out terminal has a groove on the side facing away from the cover plate, the bottom of the groove is in communication with the second through hole, the bent section is disposed in the groove, and the bent section is electrically connected to the bottom of the groove.

[0039] This application 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

[0040] 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.

[0041] Figure 1 This is a schematic diagram of the structure of a battery provided in one embodiment of this application;

[0042] Figure 2 for Figure 1 Exploded view of the local structure at point A;

[0043] Figure 3 for Figure 1 A cross-sectional view of the local structure at point A at point BB;

[0044] Figure 4 This is a schematic diagram of the structure of an insulating film provided in an embodiment of this application;

[0045] Figure 5 for Figure 4 A schematic diagram of the local structure at point C;

[0046] Figure 6 This is a schematic diagram of the structure of the insulating film and the electrode core assembly provided in the embodiments of this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 10-cell battery;

[0049] 100 - Housing;

[0050] 110 - Receiving cavity; 120 - Mounting port;

[0051] 200-cover plate;

[0052] 210 - First perforation; 220 - Cover plate body; 230 - Insulating component;

[0053] 221 - First side; 222 - Second side; 231 - First insulating part; 232 - Second insulating part;

[0054] 233 - Third Insulation Section;

[0055] 2311 - Third perforation; 2321 - Fourth perforation; 2322 - First boss;

[0056] 2323 - Second boss;

[0057] 300-lead-out terminal;

[0058] 310 - Second perforation; 320 - Groove;

[0059] 400-core module;

[0060] 410 - tab; 420 - core;

[0061] 411 - Extension section; 412 - Retracting section;

[0062] 4111 - Straight segment; 4112 - Bend segment;

[0063] 500 - Insulating film;

[0064] 510 - First bend; 520 - Second bend;

[0065] 600-End Cap. Detailed Implementation

[0066] As described in the background section, the welding slag generated during the welding process between the tabs and leads in the battery mentioned above can fall into the battery core, causing a short circuit inside the battery. The tabs are also relatively long, which affects the manufacturing cost of the battery.

[0067] The reason for this problem is that in the existing technology, the tabs and leads are welded to the side facing the inside of the housing. After the welding is completed, when the cover is placed on the housing, the welded joint will be inside the housing. Foreign objects such as welding slag will fall onto the electrode core inside the housing, which will cause the electrode core to short circuit, thus affecting the battery performance.

[0068] Furthermore, since the tabs need to be welded to the side of the lead-out terminal facing the inside of the housing, the tabs need to be pulled out to the outside of the housing to weld to the lead-out terminal on the cover plate. This requires a relatively long tab to be pulled out to the outside of the housing, while a shorter tab is not conducive to the welding process to the lead-out terminal outside the housing. Therefore, the material cost of the tabs in the prior art is relatively high, which further increases the manufacturing cost of the battery.

[0069] Furthermore, due to the long length of the tabs, after the tabs are welded to the leads, they need to be folded and placed inside the housing. Since the tabs need to be bent, the bending angle of the tabs at the separator must be greater than a certain degree. Otherwise, the positive and negative electrodes will come into contact and cause a short circuit, affecting the safety of the battery. This will not only increase the safety hazards of the battery, but also increase the difficulty of battery manufacturing and assembly, and affect the production efficiency of the battery.

[0070] To address the aforementioned technical problems, this application provides a battery and an electrical device. The battery has a first through hole in the cover plate and a second through hole in the lead-out terminal, allowing the extension of the tab to pass through the first and second through holes sequentially. This enables the extension of the tab to be electrically connected to the surface of the lead-out terminal facing away from the cover plate. Compared to welding the tab and lead-out terminal to the side facing the electrode core, since the connection between the tab and lead-out terminal is located outside the casing, it prevents foreign matter such as welding slag from falling into the electrode core inside the casing. This avoids short circuits caused by welding slag and other foreign matter. Furthermore, it eliminates the need to use tape to seal the weld between the tab and lead-out terminal to prevent welding slag from falling in, thus improving battery production efficiency.

[0071] Furthermore, compared to the existing technology that first pulls the tab out of the housing and welds it to the lead terminal, and then bends the welded tab and puts it into the housing, this application allows the tab to pass directly through the first and second through holes and connect to the lead terminal. Since it is no longer necessary to pull the tab out of the housing, the usage distance of the tab can be shortened, thereby reducing the amount of material used to make the tab in the battery, thus reducing the manufacturing cost of the tab and the battery.

[0072] Furthermore, by providing an insulating film on the outside of the electrode core, the insulating film can be positioned between the inner wall of the receiving cavity and the electrode core, thereby achieving insulation between the electrode core and the casing and improving the battery's safety. Moreover, by forming a first bend at the end of the insulating film facing the cover plate, and ensuring that the first bend at least partially covers the folded portion, insulation can be achieved between the folded portion of the electrode tab and the casing, preventing short circuits between the folded portion and the casing and further improving the battery's safety.

[0073] 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.

[0074] refer to Figure 1 , Figure 2 and Figure 3 This application provides a battery 10, which may include a housing 100, a cover plate 200, lead terminals 300, electrode core assembly 400, and an insulating film 500. The battery 10 may also include an end cap 600, which covers the side of the lead terminals 300 facing away from the cover plate 200. The housing 100 has a receiving cavity 110 and a mounting opening 120 communicating with the receiving cavity 110.

[0075] refer to Figure 2 and Figure 3 The cover plate 200 is placed over the mounting opening 120, and the cover plate 200 can be connected to the housing 100 at the mounting opening 120 by welding.

[0076] Cover plate 200 has along a first direction (e.g. Figure 3 A first through hole 210 (in the Z direction) penetrates the cover plate 200, and the first through hole 210 is provided corresponding to the mounting opening 120. The first through hole 210 can communicate with two surfaces of the cover plate 200 in the first direction.

[0077] refer to Figure 2 and Figure 3 The lead-out terminal 300 is disposed on the side of the cover plate 200 facing away from the housing 100. The lead-out terminal 300 has a second through hole 310 that passes through the lead-out terminal 300 in a first direction. The second through hole 310 is disposed corresponding to the first through hole 210 and is connected to the first through hole 210.

[0078] refer to Figure 2 and Figure 3 The electrode core assembly 400 can be disposed in the receiving cavity 110 through the mounting port 120. The electrode core assembly 400 may include an electrode tab 410 and an electrode core 420. The electrode tab 410 can be disposed at the end of the electrode core 420 facing the mounting port 120.

[0079] The tab 410 may include an extension 411 and a retractable portion 412 connected to each other. The retractable portion 412 is located at the end of the electrode core 420 facing the mounting port 120 and is connected to the electrode core 420. The extension 411 can pass through the first through hole 210 and the second through hole 310 and be electrically connected to the surface of the lead-out terminal 300 facing away from the cover plate 200. The surface of the lead-out terminal 300 facing away from the cover plate 200 can face the outside of the battery 10 so that the weld between the extension 411 of the tab 410 and the lead-out terminal 300 is located outside the battery 10.

[0080] In some embodiments, the tab 410 can be a positive tab and / or a negative tab. The cover 200 can be a cover 200 for the positive terminal of the battery 10, or the cover 200 can be a cover 200 for the negative terminal of the battery 10.

[0081] This application provides a battery 10. By opening a first through hole 210 on the cover plate 200 and a second through hole 310 on the lead terminal 300, the extension 411 of the tab 410 can pass through the first through hole 210 and the second through hole 310 in sequence, and the extension 411 of the tab 410 is electrically connected to the surface of the lead terminal 300 facing away from the cover plate 200. Compared with the method of welding the tab 410 and the lead terminal 300 to the side facing the core 420, since the connection between the tab 410 and the lead terminal 300 is located outside the housing 100, it is possible to avoid foreign objects such as welding slag generated during the welding process from falling into the core 420 inside the housing 100. This avoids the problem of short circuit in the core 420 caused by welding slag and other foreign objects. Furthermore, it eliminates the step of using tape to seal the weld between the tab 410 and the lead terminal 300 to prevent welding slag from falling, thus improving the production efficiency of the battery 10.

[0082] Furthermore, compared to the prior art where the tab 410 is first pulled out of the housing 100 and welded to the lead terminal 300, and then the welded tab 410 is bent and put into the housing 100, this application allows the tab 410 to directly pass through the first through hole 210 and the second through hole 310 and connect to the lead terminal 300. Since it is no longer necessary to pull the tab 410 out of the housing 100, the usage distance of the tab 410 can be shortened, thereby reducing the amount of material used to make the tab 410 in the battery 10, thereby reducing the manufacturing cost of the tab 410 and the manufacturing cost of the battery 10.

[0083] The electrode core 420 may have a current collector, and the end of the current collector facing the cover plate 200 has multiple foils. The electrode tab 410 may be formed by gathering multiple foils together, with the portion near the electrode core 420 being the gathering portion and the portion away from the electrode core 420 being the extension portion 411. Some foils at the gathering portion may curl up and bend towards the inner wall of the receiving cavity 110, thus there is a possibility that the curled foils may be electrically connected to the housing 100.

[0084] refer to Figure 2 , Figure 3 and Figure 4 In some embodiments, the insulating film 500 is disposed on the outside of the electrode core 420, the electrode core 420 having an outer side surface, and the insulating film 500 is at least able to wrap around the outer side surface of the electrode core 420 so that the outer side surface of the electrode core 420 is insulated from the inner sidewall of the receiving cavity 110.

[0085] The end of the electrode core 420 facing away from the cover plate 200 may also have an insulating film 500 to insulate the bottom of the electrode core 420 facing away from the cover plate 200 from the bottom of the housing 100.

[0086] The insulating film 500 has a first bend 510 formed at the end facing the cover plate 200. The first bend 510 can be bent toward the end of the pole core 420 so that the first bend 510 at least covers part of the folded portion 412. The first bend 510 is used to insulate the folded portion 412 from the housing 100.

[0087] By providing an insulating film 500 on the outside of the electrode core 420, the insulating film 500 can be positioned between the inner wall of the receiving cavity 110 and the electrode core 420, thereby achieving insulation between the electrode core 420 and the housing 100 and improving the safety of the battery 10. Furthermore, by forming a first bend 510 on the end of the insulating film 500 facing the cover plate 200, and ensuring that the first bend 510 at least partially covers the folded portion 412, insulation can be achieved between the folded portion 412 of the electrode tab 410 and the housing 100, preventing short circuits between the folded portion 412 and the housing 100 and improving the safety of the battery 10.

[0088] refer to Figure 2 and Figure 3 In some embodiments, the cover plate 200 may include a cover plate body 220 and an insulating element 230. The cover plate body 220 may include elements along a first direction (e.g., Figure 3 The cover plate body 220 has a first surface 221 and a second surface 222 facing each other in the Z direction. The first surface 221 faces the lead-out terminal 300, and the second surface 222 can face the receiving cavity 110 of the housing 100. The cover plate body 220 has a first through hole 210. The cover plate body 220 can be disposed at the mounting port 120 and can be welded to the housing 100 by welding.

[0089] The insulating member 230 may include a first insulating portion 231, which is disposed on the first surface 221. The insulating member 230 has a third through hole 2311 that communicates with the first through hole 210. The extension portion 411 passes through the first through hole 210 and the third through hole 2311 in sequence and is electrically connected to the lead-out terminal 300.

[0090] In some embodiments, the first surface 221 of the cover body 220 has a groove-shaped structure, which allows at least a portion of the first insulating portion 231 to be located within the groove-shaped structure. In this way, the groove-shaped structure can limit the first insulating portion 231 in the horizontal direction, thereby improving the connection stability between the first insulating portion 231 and the cover body 220.

[0091] It is understood that both the cover plate body 220 and the lead-out terminal 300 can be metal parts. By providing a first insulating part 231 on the first surface 221 of the cover plate body 220, the first insulating part 231 can at least insulate the lead-out terminal 300 from the cover plate body 220, thereby preventing electrical connection between the lead-out terminal 300 and the cover plate body 220 and improving the safety of the battery 10.

[0092] refer to Figure 2 and Figure 3 In some embodiments, the insulating component 230 and the cover plate body 220 are integrally injection molded. The cover plate body 220 can be a metal component, and the insulating component 230 can be made of an insulating injection molding material. Therefore, the insulating component 230 and the cover plate body 220 can be integrally injection molded.

[0093] In this way, by manufacturing the cover plate body 220 and the insulating component 230 by integral injection molding, it is possible to avoid assembling the cover plate body 220 and the insulating component 230, thereby simplifying the assembly steps of the battery 10 and improving the assembly efficiency of the battery 10.

[0094] Furthermore, by connecting the cover plate body 220 and the insulating component 230 using an integral injection molding method, the connection surface between the insulating component 230 and the cover plate body 220 can be sealed, thereby improving the sealing effect between the insulating component 230 and the cover plate body 220.

[0095] In other embodiments, the insulating component 230, the cover plate body 220, and the lead-out terminal 300 are integrally injection molded. By integrally injection molding the insulating component 230, the cover plate body 220, and the lead-out terminal 300, it is possible to avoid assembling the insulating component 230, the cover plate body 220, and the lead-out terminal 300 separately, thereby further simplifying the assembly steps of the battery 10 and improving the assembly efficiency of the battery 10. Furthermore, the insulating component 230 can also improve the sealing effect between the insulating component 230 and the lead-out terminal 300.

[0096] refer to Figure 2 and Figure 3 In some embodiments, the insulating member 230 may further include a second insulating portion 232, which is disposed on the second surface 222 of the cover plate body 220. The second insulating portion 232 has a fourth through hole 2321 communicating with the first through hole 210. The fourth through hole 2321 allows the extension portion 411 of the tab 410 to pass through. The second insulating portion 232 is used to insulate the cover plate body 220 from the retracted portion 412 of the tab 410.

[0097] In this way, the insulating member 230 includes a second insulating portion 232, and the second insulating portion 232 is disposed on the second surface 222 of the cover plate body 220. Since the second surface 222 of the cover plate body 220 faces the electrode core 420 and the electrode tab 410 inside the housing 100, the cover plate body 220 can be insulated from the electrode tab 410 through the second insulating portion 232, avoiding electrical connection between the cover plate body 220 and the electrode tab 410, and improving the safety of the battery 10.

[0098] refer to Figure 2 and Figure 3 In some embodiments, the second insulating portion 232 may include a first boss 2322 extending toward the electrode core 420, the first boss 2322 abutting against the end of the electrode core 420 toward the cover plate body 220.

[0099] In this way, by setting the first protrusion 2322 on the side facing the electrode core 420 and then assembling the cover plate 200 and the housing 100, the first protrusion 2322 can abut against the end of the electrode core 420 facing the cover plate body 220, thereby enabling the first protrusion 2322 and the bottom wall of the housing 100 to clamp the electrode core 420, which can reduce the probability of the electrode core 420 shaking inside the housing 100, improve the installation stability of the electrode core 420 in the housing 100, and thus improve the structural stability of the battery 10.

[0100] refer to Figure 2 and Figure 3 In some embodiments, the second insulating portion 232 may further include a second boss 2323 extending toward the electrode core 420, the second boss 2323 and the first boss 2322 along a second direction (e.g., Figure 2 The electrodes are arranged at intervals in the X direction. The tabs 410 are located between the first protrusion 2322 and the second protrusion 2323. The second protrusion 2323 abuts against the end of the electrode core 420 facing the cover plate body 220. The second direction is perpendicular to the first direction.

[0101] In a specific implementation, the first protrusion 2322 and the second protrusion 2323 can be located at both ends of the second insulating portion 232 along the second direction. By providing the second protrusion 2323, the electrode core 420 can be clamped and fixed by the two protrusions and the bottom wall of the housing 100, thereby further improving the installation stability of the electrode core 420 in the housing 100 and improving the structural stability of the battery 10.

[0102] refer to Figure 2 and Figure 3 In some embodiments, the insulating member 230 may further include a third insulating portion 233, which is disposed on the inner sidewall of the first through hole 210, and the third insulating portion 233 insulates the extension 411 from the cover plate body 220.

[0103] In this way, by providing a third insulating part 233 on the inner sidewall of the first perforation 210, the portion of the extension 411 of the tab 410 located inside the first perforation 210 can be prevented from directly contacting the inner sidewall of the first perforation 210. This prevents the portion of the extension 411 located inside the first perforation 210 from being electrically connected to the cover plate body 220, thereby achieving insulation between the extension 411 and the cover plate body 220 and improving the safety of the battery 10.

[0104] In some embodiments, if the insulating member 230 has a first insulating portion 231, a second insulating portion 232 and a third insulating portion 233, the first insulating portion 231 and the second insulating portion 232 can be connected through the third insulating portion 233, and the first insulating portion 231, the second insulating portion 232 and the second insulating portion 232 can be integrally injection molded.

[0105] refer to Figure 2 and Figure 3 In some embodiments, the extension 411 may include a straight segment 4111 and a bent segment 4112 connected to each other. The straight segment 4111 passes through the first through hole 210 and the second through hole 310, and the bent segment 4112 is electrically connected to the surface of the lead-out terminal 300 facing away from the cover plate 200.

[0106] In this way, by electrically connecting the bent section 4112 on the extension 411 to the surface of the lead terminal 300 facing away from the cover plate 200, foreign objects such as welding slag can be prevented from falling into the housing 100. Furthermore, by welding the bent section 4112 to the surface of the lead terminal 300 facing away from the cover plate 200, compared to welding the tab 410 to the side of the lead terminal 300 facing inwards from the housing 100, the welding difficulty between the tab 410 and the lead terminal 300 can be reduced, thereby improving the assembly efficiency of the battery 10.

[0107] refer to Figure 2 and Figure 3In some embodiments, the lead-out terminal 300 has a groove 320 on the side facing away from the cover plate 200. The bottom of the groove 320 is connected to the second through hole 310. The bent section 4112 is disposed in the groove 320 and is electrically connected to the bottom of the groove 320.

[0108] In this way, by providing a groove 320 on the side of the lead-out terminal 300 facing away from the cover plate 200, and by providing the bent section 4112 of the extension 411 at the bottom of the groove 320, the influence of the tab 410 on the height of the battery 10 in the first direction can be reduced, thereby reducing the space occupancy rate of the battery 10.

[0109] In some embodiments, the tab 410 may not protrude from the surface where the groove 320 is located, or a portion of the tab 410 may protrude from the surface where the groove 320 is located.

[0110] refer to Figure 5 and Figure 6 In some embodiments, at least one second bend 520 is formed at the end of the insulating film 500 facing the cover plate 200. The second bend 520 covers at least a portion of the surface of the electrode core 420 facing the cover plate 200. The cover plate 200 and the electrode core 420 together hold the second bend 520. The second bend 520 is used to insulate between the electrode core 420 and the cover plate 200.

[0111] By providing a second bend 520, which at least partially covers the surface of the electrode core 420 facing the cover plate 200, an electrical connection can be made between the electrode core 420 and the cover plate 200, thereby improving the safety of the battery 10 in use.

[0112] In some embodiments, the second bending portion 520 can correspond to the first boss 2322 and the second boss 2323 on the second insulating portion 232, so that the second bending portion 520 can be pressed onto the pole core 420 by the first boss 2322 and / or the second boss 2323, so that the bending portion can be pressed together by the two bosses and the pole core 420 to form a fixed insulation, which can improve the installation stability of the pole core 420 inside the housing 100 and improve the insulation effect.

[0113] In some embodiments, the second bending portion 520 may have one or more. When there are multiple second bending portions 520, the multiple second bending portions 520 can be arranged at intervals around the outer periphery of the end of the pole core 420 toward the cover plate body 220.

[0114] refer to Figure 5 and Figure 6 In some embodiments, along the second direction (e.g.) Figure 6In the X direction, the size of the first bending part 510 is larger than the size of the gathering part 412, and the second direction is perpendicular to the first direction (e.g., in the X direction). Figure 6 (Z-direction).

[0115] In this way, by making the size of the first bending portion 510 larger than the size of the closing portion 412 in the second direction, the first bending portion 510 can completely cover the closing portion 412 of the tab 410 in the second direction, thereby avoiding electrical connection between the edge of the closing portion 412 and the housing 100, and improving the insulation effect of the first bending portion 510 of the insulating film 500 between the closing portion 412 and the housing 100.

[0116] refer to Figure 5 and Figure 6 In some embodiments, along the second direction, the difference between the size of the first bend 510 and the size of the gather 412 (e.g.) Figure 6 The difference L between the dimensions of the first bending portion 510 and the gathering portion 412 can be one of 2mm, 3mm, 4mm and 5mm, or the difference L between the dimensions of the first bending portion 510 and the gathering portion 412 can be any value within the range of 2mm and 5mm.

[0117] In this way, by making the difference L between the size of the first bending portion 510 and the size of the closing portion 412 greater than 2mm, it is possible to prevent the first bending portion 510 from failing to cover the warped portion of the foil at the closing portion 412, thus avoiding electrical connection between the closing portion 412 of the electrode tab 410 and the housing 100. By making the difference L between the size of the first bending portion 510 and the size of the closing portion 412 less than 5mm, it is possible to avoid the first bending portion 510 being too long, thus avoiding waste of insulating film 500 material and reducing the manufacturing cost of the battery 10.

[0118] refer to Figure 5 In some embodiments, along the first direction, the size of the first bend 510 is larger than the size of the second bend 520.

[0119] In this way, since the first bending portion 510 is used to cover the folded portion 412 of the tab 410, by making the size of the first bending portion 510 larger than the size of the second bending portion 520, the coverage area of ​​the first bending portion 510 on the folded portion 412 of the tab 410 can be increased, thereby improving the effect of the first bending portion 510 in insulating the folded portion 412 from the housing 100.

[0120] refer to Figure 1 This application embodiment also provides an electrical device, which may include an electrical appliance and the battery 10 as described above, the battery 10 being used to provide electrical energy to the electrical appliance.

[0121] By using the aforementioned battery 10 to power the electrical device, the safety of the battery 10 in use can be improved, as can the safety of the process of the battery 10 powering the electrical device and the safety of the electrical device in use.

[0122] 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 with a battery.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, 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 top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0127] 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.

[0128] 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 battery (10), characterized in that, include: The housing (100) has a receiving cavity (110) and a mounting port (120) communicating with the receiving cavity (110); A cover plate (200) is provided over the mounting opening (120), the cover plate (200) having a first through hole (210) penetrating the cover plate (200) in a first direction; A lead-out terminal (300) is disposed on the side of the cover plate (200) facing away from the housing (100), and the lead-out terminal (300) has a second through hole (310) penetrating the lead-out terminal (300) along the first direction; An electrode assembly (400) is disposed within the receiving cavity (110), the electrode assembly (400) including an electrode tab (410) and an electrode core (420); The electrode tab (410) includes an extension (411) and a retractable portion (412) connected to each other. The retractable portion (412) is connected to the side of the electrode core (420) facing the cover plate (200). The extension (411) passes through the first through hole (210) and the second through hole (310) and is electrically connected to the lead-out terminal (300) on the surface of the cover plate (200) facing away from the cover plate (200). An insulating film (500) is disposed on the outside of the pole core (420). The end of the insulating film (500) facing the cover plate (200) has a first bend (510). The first bend (510) covers at least part of the folded portion (412). The first bend (510) is used to insulate the folded portion (412) from the housing (100).

2. The battery (10) according to claim 1, characterized in that, The cover plate (200) includes; The cover body (220) includes a first surface (221) and a second surface (222) opposite each other along the first direction, the first surface (221) facing the lead-out terminal (300), and the cover body (220) having the first through hole (210); An insulating member (230) includes a first insulating portion (231) disposed on the first surface (221), and the insulating member (230) has a third through hole (2311) communicating with the first through hole (210); The extension (411) passes through the first through hole (210) and the third through hole (2311) in sequence and is electrically connected to the lead-out terminal (300).

3. The battery (10) according to claim 2, characterized in that, The insulating component (230) and the cover plate body (220) are integrally injection molded; Alternatively, the insulating element (230), the cover plate body (220), and the lead-out terminal (300) are integrally injection molded.

4. The battery (10) according to claim 2, characterized in that, The insulating member (230) further includes a second insulating part (232), which is disposed on the second surface (222) of the cover plate body (220). The second insulating part (232) has a fourth through hole (2321) communicating with the first through hole (210). The fourth through hole (2321) allows the extension (411) of the tab (410) to pass through. The second insulating part (232) is used to insulate the cover plate body (220) from the closing part (412) of the tab (410).

5. The battery (10) according to claim 4, characterized in that, The second insulating portion (232) includes a first boss (2322) extending toward the pole core (420), the first boss (2322) abutting the end of the pole core (420) toward the cover plate body (220).

6. The battery (10) according to claim 5, characterized in that, The second insulating portion (232) further includes a second boss (2323) extending toward the pole core (420); The second protrusion (2323) and the first protrusion (2322) are arranged at intervals along the second direction, and the electrode tab (410) is located between the first protrusion (2322) and the second protrusion (2323). The second protrusion (2323) abuts against the end of the electrode core (420) facing the cover plate body (220). The second direction is perpendicular to the first direction.

7. The battery (10) according to claim 4, characterized in that, The insulating component (230) further includes a third insulating portion (233); The third insulating part (233) is disposed on the inner sidewall of the first perforation (210), and the third insulating part (233) insulates the extension (411) from the cover plate body (220).

8. The battery (10) according to any one of claims 1-7, characterized in that, The end of the insulating film (500) facing the cover plate (200) also has at least one second bend (520); The second bend (520) covers at least a portion of the surface of the electrode core (420) facing the cover plate (200), the cover plate (200) and the electrode core (420) together clamp the second bend (520), and the second bend (520) is used to insulate the electrode core (420) from the cover plate (200).

9. The battery (10) according to claim 1, characterized in that, Along the second direction, the size of the first bending portion (510) is larger than the size of the gathering portion (412), and the second direction is perpendicular to the first direction.

10. The battery (10) according to claim 9, characterized in that, Along the second direction, the difference between the size of the first bending portion (510) and the size of the gathering portion (412) is greater than or equal to 2 mm and less than or equal to 5 mm.

11. The battery (10) according to claim 8, characterized in that, Along the first direction, the size of the first bend (510) is larger than the size of the second bend (520).

12. The battery (10) according to claim 1, characterized in that, The extension (411) includes a straight segment (4111) and a bent segment (4112) that are connected to each other; The straight segment (4111) passes through the first through hole (210) and the second through hole (310), and the bent segment (4112) is electrically connected to the surface of the lead-out terminal (300) facing away from the cover plate (200).

13. The battery (10) according to claim 12, characterized in that, The lead-out terminal (300) has a groove (320) on the side facing away from the cover plate (200). The bottom of the groove (320) is connected to the second through hole (310). The bent section (4112) is disposed in the groove (320) and is electrically connected to the bottom of the groove (320).

14. An electrical appliance, characterized in that, It includes an electrical device and a battery (10) as claimed in any one of claims 1-13, the battery (10) being used to provide electrical energy to the electrical device.

Images