Battery, battery assembly and electric device

Abstract

Provided in the present application are a battery, a battery assembly and an electric device. The battery comprises a core, a cover plate assembly and an insulating film, wherein the core comprises a first end face and a second end face arranged opposite each other, and a plurality of side faces, the plurality of side faces being connected between the first end face and the second end face; the cover plate assembly is connected to and covers one side face; and the insulating film completely covers the first end face, the second end face and the other side faces, and the insulating film further covers a peripheral side wall at the end of the cover plate assembly that is close to the core. The battery, the battery assembly and the electric device provided in the present application have a simple structure, low manufacturing cost and a high rate of space utilization.

Description

Batteries, battery components and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 28, 2023, with application number 202323640002.0 and application name “Batteries, Battery Assemblies and Electrical Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application belongs to the field of battery technology, and in particular relates to a battery, a battery assembly and an electrical device. Background Art

[0004] With the advancement of technology, the cost control requirements for batteries are becoming more and more stringent, including reducing the cost of the battery's sealed insulation structure, thereby reducing the overall manufacturing cost of the battery. In the existing battery structure, in order to form an insulation design between the battery's pole core and the battery shell, the battery covers the two ends of the pole core with two spacers, then covers the top of the pole core with a cover plate, and then covers the other surfaces of the pole core with an insulating member to form an insulation design between the pole core and the battery. However, the design of the spacer makes the structure more complex and the assembly more difficult, which will increase the overall production cost of the battery. In addition, the spacer will occupy the storage space of the battery shell, making the overall space utilization of the battery low.

[0005] Summary of the Invention

[0006] In order to address the shortcomings of the prior art, the present application provides a battery, a battery assembly and an electrical device with a simple structure, low cost and high space utilization.

[0007] In one aspect, the present application provides a battery, comprising:

[0008] A pole core comprising a first end face, a second end face and a plurality of side faces arranged opposite to each other, wherein the plurality of side faces are connected between the first end face and the second end face;

[0009] a cover assembly connected to and covering one of the side surfaces; and

[0010] The insulating film completely covers the first end face, the second end face and the other side faces, and the insulating film also covers the peripheral side wall of the cover plate assembly at one end close to the pole core.

[0011] In a possible implementation, the insulating film includes a first region, a second region, and a third region connected in sequence;

[0012] The first region is bent relative to the second region, and the first region covers the first end surface;

[0013] The second area covers the other side surface; the second area includes a plurality of sub-areas, each of which covers a corresponding side surface;

[0014] The third region is bent relative to the second region, and the third region covers the second end surface.

[0015] In a possible implementation manner, the thickness of the insulating film is in the range of [0.02, 0.15] mm.

[0016] In a possible implementation manner, the side of the insulating film covering the first end surface, the second end surface, and the other side surface is adhesive.

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

[0018] a cover body, covering the fourth side surface;

[0019] a pole, one end of which is located between the cover body and the fourth side surface, and the other end of which passes through the cover body; and

[0020] A pin has one end disposed between the pole and the pole core, and the other end electrically connected to the pole tab of the pole core.

[0021] In a possible implementation manner, the cover plate assembly further includes an insulating member, and the insulating member is disposed between the pin and the pole core.

[0022] In a possible implementation manner, the pin includes a first part, a second part, and a third part connected in sequence;

[0023] The first portion is arranged between the pole and the pole core;

[0024] The second portion is arranged to protrude relative to the first portion toward the third side surface;

[0025] The third portion is protruded toward the first side surface relative to the second portion, and the third portion is electrically connected to the tab of the pole core.

[0026] In a possible implementation, along a direction from one end of the second portion connected to the first portion to one end of the second portion connected to the third portion, a width of the second portion in a direction from the first end surface to the second end surface gradually increases.

[0027] In a possible implementation manner, the first portion is embedded in the cover plate body, and a side of the first portion facing away from the pole is flush with a side of the cover plate body facing the pole core.

[0028] In another aspect, the present application provides a battery assembly comprising:

[0029] The battery mentioned above.

[0030] In another aspect, the present application provides an electrical device, comprising:

[0031] The battery assembly described above; and

[0032] A load is electrically connected to the battery assembly.

[0033] The battery, battery assembly, and electrical equipment provided by this application completely cover the first end face, second end face, first side face, second side face, and third side face of the pole core with an insulating film, and the cover plate assembly is provided on the fourth side face to form an insulation design between the pole core and the outside. Compared with the existing structure in which end caps or spacers are provided on the first and second end faces, the battery provided by this application omits the end caps or spacers and directly covers the first and second end faces with an insulating film, without the need to use end caps to cover the first and second end faces, so that the battery structure is simpler and the battery processing cost is lower. Moreover, by omitting the end cap design, the pole core space utilization rate of the battery is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some implementation methods provided by the embodiments of the present application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0035] FIG1 is a first diagram of an assembly structure of a battery provided in one embodiment of the present application;

[0036] FIG2 is a second diagram of an assembly structure of a battery provided in one embodiment of the present application;

[0037] FIG3 is an assembly diagram of a pole core and a cover plate assembly provided in one embodiment of the present application;

[0038] FIG4 is an assembly structure diagram of a cover plate assembly provided in one embodiment of the present application;

[0039] FIG5 is a structural diagram of an expanded insulating film provided by an embodiment of the present application;

[0040] FIG6 is a structural diagram of a bent insulating film provided by an embodiment of the present application;

[0041] FIG7 is an exploded view of a cover plate assembly provided in one embodiment of the present application;

[0042] FIG8 is a structural diagram of a pin provided in an embodiment of the present application.

[0043] Figure 100: Battery; 10: Electrode core; 11: First end face; 12: Second end face; 13: First side face; 14: Second side face; 15: Third side face; 16: Fourth side face; 17: Tab; 30: Cover assembly; 31: Cover body; 32: Post; 33: Pin; 34: Insulating member; 50: Insulating film; 51: First region; 52: Second region; 53: Third region; 311: Sealing ring; 312: Spacer; 313: Optical cover; 314: Insulating sleeve; 315: Terminal; 331: First part; 332: Second part; 333: Third part; 521: First sub-region; 522: Second sub-region; 523: Third sub-region. DETAILED DESCRIPTION

[0044] The technical solution of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] The description of the following embodiments is with reference to the attached diagrams, which illustrate specific embodiments that the present application can be used to implement. The directional terms mentioned in the description of the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top surface", "side", "bottom surface", "top wall", "side wall", "bottom wall", "inner side wall", "outer side wall", "length direction", "width direction", "height direction", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, for example, "first", "second", "third", "fourth", etc., are only used to distinguish the objects described and do not have any order or technical meaning. In the description of the present application, the "connection" and "connection" involved, unless otherwise specified, include direct connection (connection) and indirect connection (connection).

[0046] This application provides an electrical device, comprising a battery assembly and a load. The battery assembly is configured to electrically connect to the load and supply power to the load to enable the load to function properly. It should be understood that the electrical devices provided herein include, but are not limited to, vehicles, industrial equipment, household appliances, office equipment, and the like, and this application is not intended to limit these devices.

[0047] The present application also provides a battery assembly, which includes multiple batteries, wherein multiple batteries are stacked to form a battery assembly. The battery assembly provided in the present application includes, but is not limited to, battery modules, battery packs, and other components having batteries, and the present application does not impose any restrictions on these.

[0048] As users' demands for electrical devices become increasingly stringent, the structural complexity and production cost of battery assemblies and batteries, key components of these devices, significantly impact the overall structural complexity and production cost of the battery assembly and the device itself. Cost control for batteries includes reducing the cost of the battery's sealing and insulation structure, thereby reducing the overall manufacturing cost of the battery. In existing battery structures, to insulate the battery core from the battery housing, two spacers cover the ends of the core, a cover covers the top of the core, and an insulating member covers the remaining surfaces of the core to insulate the core from the battery. However, the spacer design complicates the structure, making assembly more difficult and increasing the overall production cost of the battery. Furthermore, the spacers occupy the storage space of the battery housing, resulting in low overall space utilization. In view of this, the present application provides a battery with a simple structure, low cost, and high space utilization, thereby simplifying the overall structure of the electrical device and reducing production costs.

[0049] The battery provided in this application is introduced in detail below.

[0050] Please refer to Figures 1 to 4. Figure 1 is an assembly structure diagram 1 of a battery provided in an embodiment of the present application, Figure 2 is an assembly structure diagram 2 of a battery provided in the present application, Figure 3 is an assembly diagram of a pole core and cover plate assembly provided in an embodiment of the present application, and Figure 4 is an assembly structure diagram of a cover plate assembly provided in an embodiment of the present application.

[0051] This embodiment provides a battery 100, which includes a pole core 10, a cover plate assembly 30 and an insulating film 50. The pole core 10 is used to form an electric power source of the battery 100. The cover plate assembly 30 is covered on one side of one end of the pole core 10. The insulating film 50 is covered on the other side of the pole core 10 except the end covered by the cover plate assembly 30. The insulating film 50 also overlaps with the peripheral side wall of the cover plate assembly 30 close to the end of the pole core 10, so that the cover plate assembly 30 and the insulating film 50 can completely cover the pole core 10.

[0052] Take the pole core 10 as an example, which is a hexahedral structure. The pole core 10 includes a first end face 11 and a second end face 12, which are oppositely disposed. It also includes a first side face 13, a second side face 14, a third side face 15, and a fourth side face 16, which are connected in sequence. The first side face 13, the second side face 14, the third side face 15, and the fourth side face 16 are all connected between the first end face 11 and the second end face 12. The first side face 13 and the third side face 15 are oppositely disposed, and the second side face 14 and the fourth side face 16 are oppositely disposed. The cover plate assembly 30 is connected to and covers the fourth side face 16 to insulate the fourth side face 16 of the pole core 10. The insulating film 50 is bent to completely cover the first end face 11, the second end face 12, the first side face 13, the second side face 14, and the third side face 15 of the pole core 10, thereby insulating the first end face 11, the second end face 12, the first side face 13, the second side face 14, and the third side face 15 of the pole core 10.

[0053] The battery 100 provided in this application has an insulating film 50 that completely covers the first end face 11, the second end face 12, the first side face 13, the second side face 14, and the third side face 15, and the cover plate assembly 30 is disposed on the fourth side face 16 to insulate the entire pole core 10 from the outside. Compared to existing structures that provide end caps on the first end face 11 and the second end face 12 to insulate the first end face 11 and the second end face 12 of the pole core 10, the battery 100 provided in this application omits the end cap design and directly covers the first end face 11 and the second end face 12 with the insulating film 50, eliminating the need for end caps, thereby simplifying the structure of the battery 100 and reducing the cost. Moreover, by omitting the end cap design, the pole core 10 of the battery 100 has a higher space utilization rate. That is, for batteries 100 of the same volume, the pole core 10 of the battery 100 provided in this application can be designed to be larger, which is conducive to increasing the capacity of the battery 100.

[0054] Please refer to Figures 1 to 6. Figure 5 is a structural diagram of an expanded insulating film provided by the present application, and Figure 6 is a structural diagram of a bent insulating film provided by an embodiment of the present application.

[0055] In a specific embodiment, the insulating film 50 includes a first region 51, a second region 52, and a third region 53 connected in sequence. The first region 51 is bent relative to the second region 52 and completely covers the first end surface 11 to insulate the first end surface 11 of the pole core 10. The second region 52 covers the side surfaces of the pole core 10 other than the end covered by the cover plate assembly 30, that is, the second region 52 completely covers the first side surface 13, the second side surface 14, and the third side surface 15 to insulate the first side surface 13, the second side surface 14, and the third side surface 15 of the pole core 10. The third region 53 is bent relative to the second region 52 and completely covers the second end surface 12 to insulate the second end surface 12 of the pole core 10. The first region 51 completely covers the first end face 11, the second region 52 completely covers the first side face 13, the second side face 14 and the third side face 15, and the third region 53 completely covers the second end face 12, so that the insulating film 50 insulates the first end face 11, the second end face 12, the first side face 13, the second side face 14 and the third side face 15 of the pole core 10. Moreover, the fourth side face 16 of the pole core 10 is insulated by the cover plate assembly 30, so that the pole core 10 of the battery 100 forms a complete insulation structure.

[0056] Furthermore, the second region 52 includes multiple subregions, each of which includes a first subregion 521, a second subregion 522, and a third subregion 523, which are connected in sequence. The first subregion 521 completely covers the first side 13 to insulate the first side 13 of the pole core 10. The second subregion 522 is bent relative to the first subregion 521 and completely covers the second side 14 to insulate the second side 14 of the pole core 10. The third subregion 523 is bent relative to the second subregion 522 and completely covers the third side 15 to insulate the third side 15 of the pole core 10. With the first subregion 521 completely covering the first side 13, the second subregion 522 completely covering the second side 14, and the third subregion 523 completely covering the third side 15, the second region 52 of the insulating film 50 insulates the first side 13, the second side 14, and the third side 15 of the pole core 10.

[0057] Please refer to Figures 1 to 6. In a specific embodiment, the thickness range of the insulating film 50 is [0.02, 0.15] mm. Optionally, the thickness of the insulating film 50 can be any value among 0.02 mm, 0.05 mm, 0.08 mm, 0.11 mm, 0.15 mm, etc. Since the insulating film 50 is too thin, the insulating effect of the insulating film 50 on the pole core 10 will be poor, while the insulating film 50 is too thick, it will affect the bending of the insulating film 50 and the overall structural size of the battery 100. By limiting the thickness range of the insulating film 50 to [0.02, 0.15] mm, the influence of the insulating film 50 on the overall size of the battery 100 can be reduced while ensuring the insulating effect of the insulating film 50 on the pole core 10, which facilitates the miniaturization of the battery 100 and is also beneficial for bending the insulating film 50 to make the fit between the insulating film 50 and the pole core 10 more secure.

[0058] Please refer to Figures 1 to 6. In a specific embodiment, the side of the insulating film 50 covering the first end face 11, the second end face 12, the first side face 13, the second side face 14, and the third side face 15 is sticky. In other words, the insulating film 50 can be a structure similar to a tape, and an adhesive layer (not shown) is provided on the insulating film 50. The adhesive layer is provided on the side of the insulating film 50 that is in contact with the first end face 11, the second end face 12, the first side face 13, the second side face 14, and the third side face 15. By having the side of the insulating film 50 covering the pole core 10 being sticky or having an adhesive layer, the attachment stability of the insulating film 50 to the pole core 10 is improved, the risk of the insulating film 50 falling off the surface of the pole core 10 can be reduced, and the insulating effect of the insulating film 50 on the pole core 10 can be ensured.

[0059] Please refer to Figures 1, 3, 7 and 8. Figure 7 is an exploded view of a cover assembly provided in one embodiment of the present application. Figure 8 is a structural diagram of a pin provided in one embodiment of the present application.

[0060] In a specific embodiment, the cover assembly 30 includes a cover body 31, a post 32, a pin 33, and an insulating member 34. The cover body 31 covers the fourth side surface 16 of the battery core 10. One end of the post 32 is located between the cover body 31 and the fourth side surface 16, and the other end extends through the cover body 31. One end of the pin 33 is located between the post 32 and the battery core 10, and the other end is bent and electrically connected to the tab 17 of the battery core 10. The pin 33 is electrically connected between the post 32 and the tab 17 of the battery core 10, thereby electrically connecting the battery core 10 to the post 32, thereby transmitting electrical energy within the battery core 10 to the outside of the battery 100 through the post 32. The insulating member 34 is located between the end of the pin 33 closest to the post 32 and the battery core 10. The insulating member 34 insulates the end of the pin 33 connected to the post 32 from the battery core 10.

[0061] More specifically, the cover body 31 includes a sealing ring 311, a spacer 312, a light cover 313, an insulating sleeve 314, and a terminal 315. The sealing ring 311 is sleeved onto the terminal 32. The spacer 312 and light cover 313 are stacked and aligned with the fourth side surface 16 of the electrode core 10. The terminal 32 passes through the spacer 312 and light cover 313. The sealing ring 311 is located between the side of the spacer 312 facing away from the light cover 313 and the end of the terminal 315. The insulating sleeve 314 is located on the side of the light cover 313 facing away from the spacer 312. The terminal 32 extends through the insulating sleeve 314. The terminal 315 is electrically connected to the end of the terminal 32 extending through the insulating sleeve 314, allowing electrical energy from the electrode core 10 to flow out of the battery 100 through the pin 33, the terminal 32, and the terminal 315 in sequence.

[0062] Referring to Figures 1, 3, 7, and 8, in a specific embodiment, the pin 33 includes a first portion 331, a second portion 332, and a third portion 333, which are sequentially connected. The first portion 331 is parallel to the spacer 312 of the cover body and is stacked between the terminal post 32 and the fourth side 16 of the terminal core 10. The second portion 332 is bent relative to the first portion 331, perpendicular to the first portion 331, and protrudes toward the third side 15. The third portion 333 is bent relative to the second portion 332, perpendicular to the first portion 331, parallel to the second portion 332, and protrudes toward the first side 13. The third portion 333 is electrically connected to the tab 17 of the terminal core 10. By protruding the second part 332 relative to the first part 331 and the third part 333 toward the third side surface 15 of the pole core 10, the second part 332 of the pin 33 can form an avoidance structure for the pole ear 17 of the pole core 10, thereby reducing the interference of the pin 33 on the pole ear 17 of the pole core 10 and reducing the influence of the pin 33 on the dressing area on the pole ear 17 of the pole core 10.

[0063] Furthermore, in the pin 33, the width of the second portion 332 in the direction from the first end face 11 to the second end face 12 gradually increases along the direction from the end of the second portion 332 connecting to the first portion 331 to the end of the second portion 332 connecting to the third portion 333. By gradually increasing the width of the second portion 332 of the pin 33 from the first portion 331 to the third portion 333, the contact between the pin 33 and the tab 17 of the pole core 10 can be further reduced, reducing the interference between the pin 33 and the tab 17 of the pole core 10 at the arc, thereby reducing the impact of the pin 33 on the dressing area of ​​the tab 17 of the pole core 10.

[0064] Referring to Figures 1, 3, 7, and 8, in a specific embodiment, the first portion 331 is embedded within the spacer 312 of the cover body 31. The side of the first portion 331 facing away from the terminal post 32 is flush with the side of the spacer 312 of the cover body 31 facing the terminal core 10. By embedding the first portion 331 of the pin 33 within the spacer 312 of the cover body, the surrounding side of the first portion 331 of the pin 33 is effectively insulated, thereby preventing creepage between the first portion 331 of the pin 33 and the terminal core 10. Moreover, the side of the first part 331 of the pin 33 close to the second part 332 is flush with the side of the spacer 312 of the cover body facing the pole core 10, that is, the side of the first part 331 of the pin 33 close to the second part 332 is on the same plane as the side of the spacer 312 of the cover body facing the pole core 10, so that the insulating part 34 can attach the first part 331 of the pin 33 to the side of the spacer 312 facing the pole core 10, which can reduce the risk of the insulating part 34 falling off.

[0065] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A battery (100), characterized in that, Comprising: A pole core (10), including a first end face (11), a second end face (12) arranged oppositely, and a plurality of side faces, and the plurality of side faces are connected between the first end face (11) and the second end face (12); A cover plate assembly (30), connected to and covering one of the side faces; and An insulating film (50), completely covering the first end face (11), the second end face (12) and the other side faces, and the insulating film (50) also covers the peripheral side wall of one end of the cover plate assembly (30) close to the pole core (10).

2. The battery (100) according to claim 1, wherein The insulating film (50) includes a first region (51), a second region (52) and a third region (53) connected in sequence; The first region (51) is bent relative to the second region (52), and the first region (51) covers the first end face (11); The second region (52) covers the other side faces; the second region (52) includes a plurality of sub-regions, and each sub-region covers a corresponding side face; The third region (53) is bent relative to the second region (52), and the third region (53) covers the second end face (12).

3. The battery (100) according to claim 1 or 2, wherein The thickness range of the insulating film (50) is [0.02, 0.15] mm.

4. The battery (100) according to any one of claims 1-3, wherein One side of the insulating film (50) covering the first end face (11), the second end face (12) and the other side faces has adhesiveness.

5. The battery (100) according to any one of claims 1-4, characterized in that, The cover plate assembly (30) includes: A cover plate body (31), covering one of the side faces; A pole post (32), one end located between the cover plate body (31) and one of the side faces, and the other end passing through the cover plate body (31); and A lead pin (33), one end arranged between the pole post (32) and the pole core (10), and the other end electrically connected to the pole ear (17) of the pole core (10).

6. The battery (100) according to claim 5, wherein The cover plate assembly (30) further includes an insulating member (34), and the insulating member (34) is arranged between the lead pin (33) and the pole core (10).

7. The battery (100) according to claim 5 or 6, wherein The lead pin (33) includes a first part (331), a second part (332) and a third part (333) connected in sequence; The first part (331) is arranged between the pole post (32) and the pole core (10); The second part (332) protrudes relative to the first part (331) towards the other side faces; The third part (333) protrudes relative to the second part (332) towards one of the side faces, and the third part (333) is electrically connected to the pole ear (17) of the pole core (10).

8. The battery (100) according to claim 7, wherein Connect one end of the first part (331) to one end of the third part (333) along the direction where the second part (332) connects the first part (331), and the width of the second part (332) gradually increases in the direction from the first end face (11) to the second end face (12).

9. The battery (100) according to claim 7 or 8, characterized in that the first part (331) is embedded in the cover body (31), and the side of the first part (331) facing away from the pole column (32) is flush with the side of the cover body (31) facing the electrode core (10). Including:

10. A battery assembly, characterized in that, The battery (100) according to any one of claims 1-9. Including:

11. An electrical equipment, characterized in that, The battery assembly according to claim 10; And a load, the load is electrically connected to the battery assembly. ​

Images