Collecting plate, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a collector plate, a battery and electric equipment. The current collecting disc comprises a main body, a connecting piece and a welding piece, the main body is used for being electrically connected with a battery cell, the connecting piece is arranged on the edge of the main body and extends in the direction away from the center line of the main body, the welding piece is arranged at the end, away from the main body, of the connecting piece and extends in the first direction, and an angle is formed between the first direction and the extending direction of the connecting piece; the welding piece is used for welding the shell. The connecting piece is arranged at the edge position of the main body, and the welding piece is arranged at one end, far away from the main body, of the connecting piece, so that the welding piece can be welded with the shell in a state far away from the battery cell. When the battery cell is welded to the shell, heat generated when the welding piece is welded to the shell is effectively reduced due to the fact that a certain distance exists between the battery cell and the welding piece, and the risk that the battery cell is burnt is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a collecting plate, a battery and electrical equipment. Background Art

[0002] The battery includes a shell and a battery cell installed in the shell, and the upper and lower ends of the shell are open, and the upper and lower ends of the shell are respectively assembled with the positive cover plate and the negative cover plate. The battery cell tabs are flattened and welded to the collector plate, and are transferred to the pole terminal of the cover plate through the collector plate. This type of battery has many assembly parts, complicated assembly procedures, and low energy density of the battery cell. In order to solve the above problems, people set the shell to a structure with one end open, for example, the bottom end of the shell is closed and the top end is open, so as to reduce the use of the cover plate, wherein the shell is charged. In a battery using such a shell, there are two collector plates for welding the battery cell tabs inside the shell, one of which is located at the upper end of the shell and connected to the pole, and the other collector plate is located at the lower end of the shell and welded to the shell. However, when the collector plate is welded to the lower end of the shell, a large amount of heat generated by welding will be transferred to the battery cell, so that the battery cell is easily burned. Utility Model Content

[0003] The utility model aims to provide a current collecting plate, a battery and an electrical device, aiming to solve the technical problem that the existing battery core is easily burned.

[0004] In a first aspect, the present application provides a current collecting plate, comprising a main body, a connecting piece and a welding piece, wherein the main body is used to be electrically connected to the battery cell, the connecting piece is arranged at the edge of the main body and extends in a direction away from the center line of the main body, the welding piece is arranged at an end of the connecting piece away from the main body and extends along a first direction, the first direction and the extension direction of the connecting piece form an angle with each other, and the welding piece is used to weld the shell.

[0005] Optionally, the main body has a first surface and a second surface that are arranged opposite to each other, the first surface is used for welding with a tab of the battery cell, and the first surface protrudes from the connecting piece.

[0006] Optionally, a partial area of ​​the first surface is recessed to form at least one recessed portion.

[0007] Optionally, the recessed portion is provided with a first through groove penetrating the second surface.

[0008] Optionally, a region of the second surface corresponding to the recessed portion is raised to form a protruding portion.

[0009] Optionally, the main body is provided with a ventilation groove.

[0010] Optionally, the ventilation slot is located at the center of the body.

[0011] Optionally, a crack stop opening is provided at an edge of the main body, the crack stop opening extends in a direction away from a center line of the main body and penetrates the main body, and one end of the crack stop opening extends to the connecting piece.

[0012] Optionally, a second through groove penetrating the connecting member is formed on the connecting member.

[0013] Optionally, the first direction is parallel to a centerline of the body.

[0014] In a second aspect, the present application provides a battery, comprising a shell, a battery cell and the above-mentioned current collecting plate, the battery cell is installed in the shell, an explosion-proof valve is provided in the middle of one end of the shell, the current collecting plate is located between the battery cell and the shell, and a ventilation groove is provided in the middle of the current collecting plate.

[0015] In a third aspect, the present application provides an electrical device including the above-mentioned battery.

[0016] The collector provided by the utility model has the following beneficial effects: by arranging a connector at the edge of the main body and arranging a welding piece at one end of the connector away from the main body, the welding piece can be welded to the shell in a state away from the battery cell. The heat generated when the welding piece is welded to the shell is effectively reduced due to the certain distance between the battery cell and the welding piece, thereby reducing the risk of the battery cell being burned. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the utility model;

[0019] Figure 2 Another structural schematic diagram of a battery provided in an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of the structure of a current collecting plate provided in an embodiment of the utility model;

[0021] Figure 4 Another structural schematic diagram of a battery provided in an embodiment of the utility model;

[0022] Figure 5 for Figure 4 A magnified view of middle;

[0023] Figure 6Another structural schematic diagram of the current collecting plate provided in the embodiment of the utility model;

[0024] Figure 7 Another structural schematic diagram of a battery provided in an embodiment of the utility model;

[0025] Figure 8 for Figure 5 Enlarged view of B.

[0026] Among them, the reference numerals in the figure are:

[0027] 100. Collecting plate; 10. Main body; 20. Connecting piece;

[0028] 30. Welding part; 11. First surface; 12. Second surface;

[0029] 13. Crack stopper; 14. Ventilation groove; 15. Abutment portion;

[0030] 16. welding portion; 21. second through groove; 111. recessed portion;

[0031] 1111, first through groove; 121, raised portion; 151, first flange;

[0032] 161. second flange; 1. battery; 200. housing;

[0033] 210, first installation cavity; 220, second installation cavity; 230, air hole;

[0034] 240, first protrusion; 250, second protrusion; 300, battery cell;

[0035] 400. End cover assembly; 500. Explosion-proof valve. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0038] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Please refer to Figures 1 to 8 Now, the current collecting plate 100, the battery 1 and the electrical equipment in the embodiment of the utility model are described.

[0042] Please refer to Figure 1 and Figure 2 The present application provides a battery 1, including a shell 200, a battery cell 300 and a current collecting plate 100, the battery cell 300 is installed in the shell 200, an explosion-proof valve 500 is provided in the middle of one end of the shell 200, the current collecting plate 100 is located between the battery cell 300 and the shell 200, and a venting groove 14 is provided in the middle of the current collecting plate 100.

[0043] The battery 1 further includes an end cap assembly 400. A first mounting cavity 210 for accommodating the battery cell 300 is provided on the top surface of the shell 200. A second mounting cavity 220 for mounting the explosion-proof valve 500 is provided in the middle of the bottom surface of the shell 200. An air hole 230 is provided in the middle of the wall surface of the second mounting cavity 220 close to the first mounting cavity 210. The air hole 230 penetrates the bottom wall of the shell 200 and communicates with the first mounting cavity 210. The collector plate 100 is located in the first mounting cavity 210 and is welded to the bottom of the shell 200 by penetration welding. The first pole ear of the battery cell 300 is welded to the top surface of the collector plate 100 to realize the electrical connection between the battery cell 300 and the shell 200. The end cap assembly 400 is sealed at the top of the shell 200 to seal the first mounting cavity 210. The second pole ear of the battery cell 300 is welded to the end cap assembly 400. The polarity of the first electrode tab is opposite to that of the second electrode tab. The first electrode tab can be a positive electrode tab or a negative electrode tab, which is not limited here.

[0044] The explosion-proof valve 500 relieves pressure when thermal runaway occurs in the battery 1. Taking a cylindrical battery as an example, in the prior art, generally, the explosion-proof valve 500 is arranged on the cover plate of the end cap assembly 400. However, since the cover plate is also provided with a pole, the area occupied by the explosion-proof valve 500 on the cover plate is limited, so that the explosion-proof valve 500 is insufficient to meet the requirements of a higher capacity battery cell 300, and safety problems are prone to occur.

[0045] In the battery 1 of the present application, since the battery cell 300 is electrically connected to the shell 200 through the current collecting plate 100, there is no need to set a pole at the bottom of the shell 200. By setting the second installation cavity 220 on the bottom surface of the shell 200, the size of the explosion-proof valve 500 is not limited by the pole. In other words, compared with the existing battery 1 in which the explosion-proof valve 500 is set on the cover plate, the explosion-proof valve 500 of the battery 1 can be designed to be larger, so that the explosion-proof valve 500 can meet the use requirements of the battery cell 300 with a higher capacity, which is conducive to improving the safety performance of the battery 1.

[0046] In addition, in existing cylindrical batteries, the pole is generally arranged in the middle of the cover plate, which results in that the explosion-proof valve 500 can only be arranged eccentrically on the cover plate. In the battery 1 of the present application, the air hole 230 and the second installation cavity 220 are arranged in the middle of the bottom surface of the shell 200, so that the explosion-proof valve 500 is installed in the middle of the bottom surface of the shell 200, which can improve the sensitivity and stability of the explosion-proof valve 500.

[0047] As mentioned in the background art, in the prior art, when the collecting plate 100 is welded to the lower end of the shell 200 by penetration welding, a large amount of heat generated by the welding will be transferred to the battery cell 300, so that the battery cell 300 is easily burned.

[0048] To this end, the present application also provides a current collecting plate 100 to solve the above problems. Figures 3 to 5 The current collecting plate 100 provided in the present application includes a main body 10, a connecting member 20 and a welding member 30. The main body 10 is used to be electrically connected to the battery cell 300. The connecting member 20 is arranged at the edge of the main body 10 and extends in a direction away from the center line of the main body 10. The welding member 30 is arranged at one end of the connecting member 20 away from the main body 10 and extends along a first direction. The first direction and the extending direction of the connecting member 20 form an angle with each other. The welding member 30 is used to weld the shell 200. Please combine Figure 2 and Figure 3 The thickness direction of the main body 10 is the up-down direction, and the center line of the main body 10 is parallel to the thickness direction of the main body 10 .

[0049] By arranging the connector 20 at the edge of the main body 10 and arranging the welding piece 30 at one end of the connector 20 away from the main body 10, the welding piece 30 can be welded to the housing 200 away from the battery cell 300. The heat generated when the welding piece 30 is welded to the housing 200 is effectively reduced due to the certain distance between the battery cell 300 and the welding piece 30, thereby reducing the risk of the battery cell 300 being burned.

[0050] It is understandable that the connector 20 may extend in the radial direction of the main body 10 or in the second direction, which is not limited here. The radial direction of the main body 10 is perpendicular to the up-down direction, and the second direction is inclined to the up-down direction. In this embodiment, the bottom wall of the shell 200 is set as a plane, and the connector 20 extends in the radial direction of the main body 10. Such a setting can increase the contact area between the connector 20 and the bottom wall of the shell 200, which is beneficial to improve the stability of the collector plate 100 and the shell 200 after welding, and reduce the shaking of the collector plate 100 caused by vibration.

[0051] In another embodiment of the present application, please refer to Figures 2 to 5 , the first direction is parallel to the center line of the main body 10, that is, the first direction is parallel to the up-down direction. Generally, the bottom end of the inner wall of the shell 200 is cylindrical. The welding piece 30 extends in the up-down direction, which can increase the contact area between the welding piece 30 and the shell 200, thereby increasing the welding area between the welding piece 30 and the shell 200, which is beneficial to improve the stability of the welding piece 30 and the shell 200 after welding.

[0052] Of course, in some other embodiments, when the bottom end of the inner wall of the shell 200 is conical, the first direction is inclined to the up-down direction so that the welding piece 30 can fit the inner wall of the shell 200 as closely as possible.

[0053] Preferably, in this embodiment, the connecting member 20 extends in the radial direction of the main body 10, and the welding member 30 extends in the up-down direction, that is, the welding member 30 is perpendicular to the connecting member 20. It is understandable that in actual production, it is difficult for the welding member 30 and the connecting member 20 to be ideally perpendicular to each other. Therefore, in this application, as long as the angle between the connecting member 20 and the welding member 30 is within 5° of 90°, they can be regarded as perpendicular, that is, when the angle between the two is 85° to 95°, the two are perpendicular to each other.

[0054] In another embodiment of the present application, please refer to Figure 2 , Figure 3 and Figure 8 The main body 10 has a first surface 11 and a second surface 12 that are arranged opposite to each other. The first surface 11 is used for welding with the tab of the battery cell 300, and the first surface 11 protrudes from the connector 20. Specifically, the first surface 11 and the second surface 12 are arranged opposite to each other in the up-down direction. The first surface 11 faces upward, and the second surface 12 faces downward. In the up-down direction, the first surface 11 is located above the connector 20. In other words, the connector 20 is located below the battery cell 300. With such an arrangement, on the one hand, the heat transferred to the battery cell 300 when the collecting plate 100 is welded to the shell 200 can be further reduced. On the other hand, while avoiding interference between the welding part 30 and the battery cell 300, the welding part 30 has a sufficient height to be welded with the shell 200, which is conducive to improving the welding quality.

[0055] In another embodiment of the present application, please refer to Figure 3 and Figure 4 , a part of the first surface 11 is recessed to form at least one recessed portion 111. Specifically, the first surface 11 and the second surface 12 are connected via a side surface, and one end of the recessed portion 111 extends to the side surface of the main body 10. This arrangement can improve the flowability of the gas inside the housing 200.

[0056] The number of the recessed portions 111 may be one, two or more, which is not limited herein.

[0057] In another embodiment of the present application, please refer to Figure 3 and Figure 4 The recessed portion 111 is provided with a first through groove 1111 penetrating the second surface 12, and the first through groove 1111 is provided on the bottom wall of the recessed portion 111. Such a configuration can reduce the weight of the current collecting plate 100.

[0058] In another embodiment of the present application, please refer to Figure 8, the area of ​​the second surface 12 corresponding to the recessed portion 111 is raised to form a raised portion 121. The raised portion 121 is used to abut the shell 200, which can reduce the risk of damage to the current collecting plate 100 due to vibration of the battery cell 300. When the recessed portion 111 is provided with a first through groove 1111, the first through groove 1111 extends in the up-down direction and penetrates the raised portion 121. In this way, the contact area between the raised portion 121 and the shell 200 can be reduced, so that the current collecting plate 100 and the shell 200 can be better in contact, thereby reducing the risk of poor welding between the current collecting plate 100 and the shell 200.

[0059] In some embodiments, the recessed portion 111 and the raised portion 121 are integrally formed by a stamping process to simplify the production process and improve production efficiency.

[0060] In some embodiments, please combine Figure 5 and Figure 8 , a first protrusion 240 is provided in the middle of the bottom wall of the shell 200, and the air hole 230 penetrates the first protrusion 240 in the up-down direction. A second protrusion 250 is also provided on the bottom wall of the shell 200. The second protrusion 250 is arranged at intervals from the first protrusion 240, and a groove is formed between the second protrusion 250 and the first protrusion 240, and the protrusion 121 abuts against the second protrusion 250. In the radial direction of the main body 10, the end of the first through groove 1111 close to the center line of the main body 10 protrudes from the end of the second protrusion 250 close to the center line of the main body 10, so that the first through groove 1111 is connected with the groove, and the current collecting plate 100 and the first boss have a gap in the up-down direction. When the battery 1 has thermal runaway, the gas inside the shell 200 flows through the recessed portion 111, the first through groove 1111 and the groove in sequence, and finally enters the air hole 230 through the gap between the current collecting plate 100 and the first boss and acts on the explosion-proof valve 500. It can be seen that, in addition to the aforementioned effects, the first through groove 1111 can also be used to allow gas to flow, so as to ensure that the explosion-proof valve 500 opens smoothly, which is beneficial to improving the safety performance of the battery 1 using the current collecting plate 100 .

[0061] Please refer to Figure 3 It is easy to understand that the concave portion 111 and the convex portion 121 define the abutting portion 15 on the main body 10, and the rest of the main body 10 is the welding portion 16 for welding with the tab of the battery cell 300, that is, the main body 10 includes the abutting portion 15 and the welding portion 16. In the up-down direction, the top surface of the welding portion 16 is higher than the top surface of the abutting portion 15, and the bottom surface of the welding portion 16 is higher than the bottom surface of the abutting portion 15.

[0062] In some embodiments, please refer to Figure 6 and Figure 8 One end of the abutting portion 15 away from the center line of the main body 10 is bent downward to form a first flange 151 , and the connecting member 20 is connected to the bottom end of the first flange 151 .

[0063] In some embodiments, please refer to Figure 3 and Figure 5 One end of the welding portion 16 away from the center line of the main body 10 is bent downward to form a second flange 161 , and the connecting member 20 is connected to the bottom end of the second flange 161 .

[0064] The provision of the first flange 151 and the second flange 161 can make the distance between the connecting member 20 and the first surface 11 in the vertical direction longer, so that the length of the welding member 30 in the vertical direction can be longer, which is beneficial to improving the welding quality.

[0065] In another embodiment of the present application, please refer to Figures 3 to 8 The main body 10 is provided with a venting groove 14. Specifically, the venting groove 14 is provided on the first surface 11 and penetrates the main body 10 in the vertical direction. The venting groove 14 is used for allowing the gas inside the housing 200 to flow so that the gas acts on the explosion-proof valve 500.

[0066] In another embodiment of the present application, please refer to Figures 3 to 8 , the vent groove 14 is located at the center of the main body 10. In the battery 1 provided in the present application, the explosion-proof valve 500 is installed in the middle of the bottom surface of the shell 200, and the air hole 230 is arranged in the middle of the bottom wall of the shell 200. Therefore, the vent groove 14 is arranged at the center of the main body 10 so that the vent groove 14 faces the explosion-proof valve 500, which can further improve the gas flowability and facilitate the opening of the explosion-proof valve 500.

[0067] In another embodiment of the present application, please refer to Figure 3 and Figure 6 The edge of the main body 10 is provided with a crack stopper 13, which extends in a direction away from the center line of the main body 10 and penetrates the main body 10, and one end of the crack stopper 13 extends to the connector 20. Specifically, the crack stopper 13 is provided at the junction of the abutment portion 15 and the welding portion 16, and the crack stopper 13 penetrates the side surface of the main body 10 to form an opening, and the crack stopper 13 penetrates the current collecting plate 100 in the up and down direction. When the battery 1 vibrates, the connection between the connector 20 and the main body 10 is prone to cracking. By providing the crack stopper 13 on the main body 10, the risk of cracking of the current collecting plate 100 can be reduced.

[0068] In addition, as can be seen from the foregoing, the protrusion 121 is formed by protrusion on the second surface 12, and the protrusion 121 is in contact with the second protrusion 250, so there is a gap between the second surface 12 and the second protrusion 250. When the battery 1 has thermal runaway, the gas in the shell 200 can enter the air hole 230 through the crack stop opening 13 and act on the explosion-proof valve 500, further improving the gas flowability.

[0069] In another embodiment of the present application, please refer to Figures 3 to 5The connector 20 is provided with a second through slot 21 that penetrates the connector 20. The second through slot 21 is provided on the top surface of the connector 20 and penetrates to the bottom surface of the connector 20. When the battery cell 300 is short-circuited and the current is too large, the connector 20 is disconnected at the second through slot 21, so that the welding piece 30 is separated from the main body 10, which is beneficial to improve the safety performance of the battery 1 using the current collecting plate 100.

[0070] In some embodiments, please refer to Figures 6 to 8 The connecting member 20 is connected to the abutting portion 15 via the first flange 151. In this embodiment, the connecting member 20 may be provided with a second through groove 21 or may not be provided with the second through groove 21 because the first through groove 1111 on the abutting portion 15 may serve as the second through groove 21.

[0071] It is worth mentioning that in the existing battery, the explosion-proof valve 500 is arranged on the cover plate of the end cover assembly 400. Since the middle part of the cover plate is used to install the pole, the explosion-proof valve 500 has to be eccentrically arranged on the cover plate, that is, the explosion-proof valve 500 is arranged on the edge area of ​​the cover plate. The collector 100 electrically connected to the end cover assembly 400 needs to have a through hole for the gas inside the shell 200 to flow and act on the explosion-proof valve 500. However, the through hole needs to be opened in the middle of the collector 100, because the edge area of ​​the collector 100 is used to weld the battery cell 300. In this way, there is a gap between the collector 100 and the explosion-proof valve 500 in the up and down directions to ensure that the explosion-proof valve 500 opens smoothly. In the battery 1 provided in the present application, since the explosion-proof valve 500 does not need to be arranged on the end cover assembly 400, the collector 100 electrically connected to the end cover assembly 400 does not need to reserve a gap for gas circulation, which effectively improves the space utilization rate inside the battery 1 in the up and down directions, thereby improving the energy density of the battery 1.

[0072] The present application also provides an electrical device, including the above-mentioned battery 1. The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc., which are not listed here one by one.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A collecting plate, characterized in that: include: A main body (10), used for being electrically connected to the battery cell; A connecting member (20) is disposed on an edge of the main body (10) and extends in a direction away from a center line of the main body (10); A welding piece (30) is arranged at one end of the connecting piece (20) away from the main body (10) and extends along a first direction, wherein the first direction and the extending direction of the connecting piece (20) form an angle with each other, and the welding piece (30) is used for welding the shell.

2. The collecting plate according to claim 1, characterized in that: The main body (10) has a first surface (11) and a second surface (12) which are arranged opposite to each other, the first surface (11) being used for welding with a tab of a battery cell, and the first surface (11) protruding from the connecting piece (20).

3. The collecting plate according to claim 2, characterized in that: A partial area of ​​the first surface (11) is recessed to form at least one recessed portion (111).

4. The collecting plate according to claim 3, characterized in that: The recessed portion (111) is provided with a first through groove (1111) penetrating the second surface (12).

5. The collecting plate according to claim 3, characterized in that: The area of ​​the second surface (12) corresponding to the recessed portion (111) is raised to form a raised portion (121).

6. The collecting plate according to claim 1, characterized in that: The main body (10) is provided with a ventilation groove (14); The air permeable groove (14) is located at the center of the main body (10).

7. The collecting plate according to claim 1, characterized in that: The edge of the main body (10) is provided with a crack stop opening (13), which extends in a direction away from the center line of the main body (10) and penetrates the main body (10), and one end of the crack stop opening (13) extends to the connecting piece (20).

8. The collecting plate according to claim 1, characterized in that: The connecting piece (20) is provided with a second through groove (21) penetrating the connecting piece (20); And / or, the first direction is parallel to the center line of the body (10).

9. A battery, characterized in that: The invention comprises a shell (200), a battery cell (300) and a current collecting plate (100) according to any one of claims 1 to 8, wherein the battery cell (300) is installed in the shell (200), an explosion-proof valve (500) is provided in the middle of one end of the shell (200), the current collecting plate (100) is located between the battery cell (300) and the shell (200), and a ventilation groove (14) is provided in the middle of the current collecting plate (100).

10. An electrical equipment, characterized in that: Comprising the battery (1) as claimed in claim 9.

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