Energy storage device and electric equipment

Abstract

The utility model relates to an energy storage device and electric equipment. The energy storage device comprises a shell, a battery cell, a cover plate, a first pole and a second pole. The shell is provided with a containing cavity and a first side wall. The first side wall is provided with a first hole site. The first pole is provided with a first protrusion, the first pole is connected to the surface, facing the containing cavity, of the first side wall, the first protrusion is clamped in the first hole position, and the first protrusion protrudes out of the surface, deviating from the containing cavity, of the first side wall by a preset length, or the first protrusion is flush with the surface, deviating from the containing cavity, of the side wall. According to the scheme, the first protrusion protrudes out of the surface, deviating from the containing cavity, of the first side wall by the preset length or is flush with the surface, deviating from the containing cavity, of the side wall, so that when the edge of the shell is cut, the receding area of the receding flange edge can be controlled to be a small numerical value, and even the first pole does not need to be receded; therefore, the energy storage device does not need to occupy more assembling space in the subsequent processing and assembling process, and the structural compactness is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an energy storage device and electrical equipment. Background Art

[0002] In the production process of some existing batteries, especially steel-shell batteries with flange edges, after the flange edges of the cover plate and the shell are welded and packaged, the excess portion of the flange edge needs to be cut off.

[0003] In the related art, the flange edge is generally cut by die cutting or laser cutting.

[0004] However, during the cutting process, due to the need to avoid the poles protruding from the battery shell, the flange edge of the shell after cutting will form a wider air-avoidance flange edge at the pole position, which in turn causes the battery to occupy more assembly space in the subsequent processing and assembly of electronic products, reducing the structural compactness of the electronic products. Utility Model Content

[0005] Based on this, it is necessary to provide an energy storage device and electrical equipment to address the problem in related technologies that the air-avoiding flange edge of the battery occupies more assembly space during the processing and assembly of electronic products, reducing the structural compactness of the electronic products.

[0006] In one aspect, the present application provides an energy storage device, comprising:

[0007] A housing, the housing having a receiving cavity and a first side wall, wherein the first side wall is provided with a first hole;

[0008] A battery cell, the battery cell being installed in the accommodating cavity;

[0009] a cover plate, the cover plate being used to cover the shell and seal the accommodating cavity;

[0010] a first electrode, the first electrode having a first protrusion, the first electrode being connected to a surface of the first side wall facing the accommodating cavity and being electrically connected to the battery cell, the first protrusion being clamped in the first hole, and the first protrusion protruding from the surface of the first side wall away from the accommodating cavity by a preset length, or the first protrusion being flush with the surface of the first side wall away from the accommodating cavity;

[0011] A second pole is connected to the first side wall.

[0012] In one embodiment, the shell has a flange along its circumference, and when the cover plate is placed on the shell, the cover plate and the flange are attached to and fixed to each other.

[0013] In one embodiment, the cover plate and the flange are fixed to each other by laser welding.

[0014] In one embodiment, the first pole includes a first metal sheet and an insulating sheet, the first protrusion is provided on the first metal sheet, the insulating sheet is provided with a first assembly hole, the insulating sheet is used to be fitted and fixed on the surface of the first side wall facing the accommodating cavity, and the first assembly hole is positioned relative to the first hole position, the first metal sheet is fitted to the insulating sheet, and the first protrusion passes through the first assembly hole.

[0015] In one embodiment, the first pole also includes a second metal sheet, which is provided with a second assembly hole. The second metal sheet is used to be attached and fixed to the surface of the first side wall facing the accommodating cavity. The insulating sheet is attached to the second metal sheet, and the first assembly hole, the second assembly hole and the first hole are relatively positioned. The first metal sheet is attached to the insulating sheet, and the first protrusion passes through the first assembly hole and the second assembly hole.

[0016] In one embodiment, the second metal sheet and the surface of the first side wall facing the accommodating cavity are fixed to each other by laser welding.

[0017] In one embodiment, the first side wall is further provided with a second hole, the second hole being used to allow electrolyte to be injected into the accommodating cavity, and the energy storage device further includes a sealing nail, the sealing nail being used to seal the second hole.

[0018] In one embodiment, the cover plate and / or the shell are provided with explosion-proof patterns.

[0019] In one embodiment, the thickness of the first pole ranges from 0.1 mm to 0.5 mm.

[0020] On the other hand, the present application also provides an electrical device, which includes the above-mentioned energy storage device.

[0021] The above-mentioned energy storage device and electrical equipment connect the first pole to the surface of the first side wall facing the accommodating cavity, the first protrusion is clamped in the first hole position, and the first protrusion protrudes from the surface of the first side wall away from the accommodating cavity by a preset length or the first protrusion is flush with the surface of the first side wall away from the accommodating cavity. In this way, when the edge of the shell is cut, the avoidance area of ​​the air-avoidance flange edge that avoids the first protrusion can be controlled to a small value, and there is even no need to avoid the first pole, completely avoiding the situation where the air-avoidance flange edge is formed at the position of the first pole, thereby making it possible for the energy storage device to not occupy more assembly space in the subsequent processing and assembly process of the electrical equipment, thereby improving the structural compactness of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of an energy storage device in an embodiment of the present application is shown.

[0023] Figure 2 for Figure 1 The schematic diagram of the structure of the energy storage device is shown after the cover plate is omitted.

[0024] Figure 3 for Figure 2 The structure shown is a schematic diagram of the structure after omitting the battery cells.

[0025] Figure 4 for Figure 3 Exploded view of the structure shown.

[0026] Explanation of Figure Numbers

[0027] 10. Energy storage device; 100. Shell; 100a. Accommodation cavity; 110. First side wall; 110a. First hole; 110b. Second hole; 120. Flange; 200. Battery cell; 300. Cover; 310. Explosion-proof pattern; 400. First pole; 410. First metal sheet; 411. First protrusion; 420. Insulating sheet; 420a. First assembly hole; 500. Second pole; 510. First nickel sheet; 520. Second nickel sheet; 600. Sealing nail. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does 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 this application.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0034] See Figures 1-4 , Figure 1 FIG. 1 shows a schematic structural diagram of an energy storage device 10 in an embodiment of the present application. Figure 2 for Figure 1 The structure diagram of the energy storage device 10 shown in FIG. 1 is a schematic diagram of the structure of the energy storage device 10 after omitting the cover plate 300. Figure 3 for Figure 2 The structure shown is a schematic diagram of the structure after omitting the battery cell 200. Figure 4 for Figure 3 Exploded view of the structure shown.

[0035] An energy storage device 10 provided in one embodiment of the present application includes a housing 100, a battery cell 200, a cover plate 300, a first terminal 400, and a second terminal 500. The housing 100 has a receiving cavity 100a and a first sidewall 110. The first sidewall 110 defines a first hole 110a. The battery cell 200 is mounted in the receiving cavity 100a. The cover plate 300 is configured to cover the housing 100 and seal the receiving cavity 100a. The first pole 400 has a first protrusion 411, which is connected to the surface of the first side wall 110 facing the accommodating cavity 100a and is electrically connected to the battery cell 200. The first protrusion 411 is clamped in the first hole 110a, and the first protrusion 411 protrudes from the surface of the first side wall 110 away from the accommodating cavity 100a by a preset length, or the first protrusion 411 is flush with the surface of the first side wall 110 away from the accommodating cavity 100a; the second pole 500 is connected to the first side wall 110.

[0036] In the energy storage device 10, the first pole 400 is connected to the surface of the first side wall 110 facing the accommodating cavity 100a. The first protrusion 411 is locked in the first hole 110a. The first protrusion 411 protrudes from the surface of the first side wall 110 away from the accommodating cavity 100a by a preset length, or the first protrusion 411 is flush with the surface of the first side wall 110 away from the accommodating cavity 100a. In this way, when the edge of the shell 100 is cut, the avoidance area of ​​the air-avoidance flange edge that avoids the first protrusion 411 can be controlled to a small value, and there is even no need to avoid the first pole 400, completely avoiding the situation where an air-avoidance flange edge is formed at the position of the first pole 400. As a result, the energy storage device 10 does not need to occupy more assembly space in the subsequent processing and assembly steps of the electrical equipment, thereby improving the structural compactness of the electrical equipment.

[0037] Furthermore, conventional laser cutting is typically used to cut the flange edge of a battery. Consequently, the heat from the laser during the cutting process can radiate heat to the protruding pole, thereby affecting the pole's sealing and increasing the battery's safety risk. However, the present invention connects the first pole 400 to the surface of the first sidewall 110 facing the accommodating cavity 100a, allowing the first pole 400 to be positioned within the accommodating cavity 100a. This reduces the impact of high temperatures generated by cutting on the sealing of the first pole 400 and improves the safety of the energy storage device 10.

[0038] Optionally, the housing 100 may include, but is not limited to, a flange 120 along its circumference. When the cover plate 300 is placed on the housing 100, the cover plate 300 and the flange 120 are attached to and fixed to each other. Preferably, the cover plate 300 and the flange 120 are fixed to each other by laser welding, which can improve the structural stability of the energy storage device 10.

[0039] It is understandable that the above-mentioned solution of the present application is not limited to application in embodiments having a flange 120 and the flange 120 needs to be cut. The above-mentioned solution of the present application is also applicable to some other embodiments, such as related embodiments in which the cover plate 300 can be directly attached to the side wall of the shell 100 in the wall thickness direction and fixed to each other, which will not be repeated here.

[0040] Optionally, the housing 100 may be, but is not limited to, a rectangular parallelepiped shape. Specifically, in space-constrained electrical devices, such as portable electronic products, the size requirements for the energy storage device 10 configured therein are relatively high. Regularly sized energy storage devices 10 are more adaptable to assembly. Saving assembly space can increase the battery capacity relative to the space, ensuring a compact electronic product structure. In this embodiment, the rectangular parallelepiped housing 100 can meet the needs of most portable electronic products, improving the applicability of the energy storage device 10 of this application.

[0041] Optionally, the thickness of the first electrode 400 ranges from 0.1 mm to 0.5 mm. This allows the first electrode 400 to be designed within a reasonable and relatively small thickness range, thereby correspondingly allowing the battery cell 200 to be designed to be larger, thereby increasing the energy density of the battery cell 200. Specifically, the thickness of the first electrode 400 can be, but is not limited to, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm.

[0042] Optionally, the first pole 400 may include, but is not limited to, a first metal sheet 410 and an insulating sheet 420. The first protrusion 411 is provided on the first metal sheet 410. The insulating sheet 420 defines a first assembly hole 420a. The insulating sheet 420 is configured to be attached to and fixed on the surface of the first side wall 110 facing the accommodating cavity 100a. The first assembly hole 420a is positioned opposite the first hole 110a. The first metal sheet 410 is attached to the insulating sheet 420, and the first protrusion 411 passes through the first assembly hole 420a.

[0043] Specifically, in this embodiment, the first metal sheet 410 is adhered to the insulating sheet 420, and the first protrusion 411 passes through the first assembly hole 420a, so that a composite pole can be formed, which helps to reduce the thickness of the first pole 400, release the design size of the battery cell 200, and improve the energy density of the battery cell 200 of the energy storage device 10.

[0044] Optionally, in some other embodiments, the first pole 400 may, but is not limited to, further include a second metal sheet (not shown), the second metal sheet having a second assembly hole, the second metal sheet being used to be adhered and fixed to the surface of the first side wall 110 facing the accommodating cavity 100a, the insulating sheet 420 being adhered to the second metal sheet, and the first assembly hole 420a, the second assembly hole and the first hole position 110a being relatively positioned, the first metal sheet 410 being adhered to the insulating sheet 420, and the first protrusion 411 passing through the first assembly hole 420a and the second assembly hole.

[0045] Specifically, in this embodiment, a second metal sheet is added between the first sidewall 110 and the insulating sheet 420, thereby improving the connection stability between the first pole 400 and the first sidewall 110. Preferably, the second metal sheet and the surface of the first sidewall 110 facing the accommodating cavity 100a are fixed to each other by laser welding. More preferably, the insulating sheet 420 is sandwiched between the first metal sheet 410 and the second metal sheet, and the first metal sheet 410 and the second metal sheet are thermally pressed together by the insulating sheet 420, thereby improving structural compactness and connection stability.

[0046] Optionally, the insulating sheet 420 may be implemented by, but is not limited to, PP (Polypropylene) glue, epoxy resin, modified insulating glue, etc.

[0047] Optionally, the second metal sheet may be, but is not limited to, an alloy, such as stainless steel or copper-nickel-plated alloy.

[0048] Optionally, the first metal sheet 410 may be made of, but is not limited to, alloys such as aluminum or nickel.

[0049] Optionally, the second electrode 500 may include, but is not limited to, a first nickel sheet 510 and a second nickel sheet 520. The first nickel sheet 510 is attached to and fixed on a surface of the first sidewall 110 facing the accommodating cavity 100a, and the second nickel sheet 520 is attached to and fixed on a surface of the first sidewall 110 facing away from the accommodating cavity 100a. The first nickel sheet 510 is electrically connected to the battery cell 200.

[0050] Preferably, the first nickel sheet 510 and the first sidewall 110 can be attached and fixed to each other by, but not limited to, welding, which can ensure the stability of the connection between the battery cell 200 and the housing 100. It should be noted that in this embodiment, the first terminal 400 serves as the positive electrode of the energy storage device 10, and the housing 100 is electrically connected to the battery cell 200 via the first nickel sheet 510, so that the housing 100 itself serves as the negative electrode of the energy storage device 10.

[0051] Optionally, the first side wall 110 may be but is not limited to further having a second hole 110b, which is used to allow electrolyte to be injected into the accommodating cavity 100a. The energy storage device 10 further includes a sealing pin 600, which is used to seal the second hole 110b. In this way, the sealing of the energy storage device 10 can be ensured after the energy storage device 10 is filled with liquid.

[0052] Optionally, the cover plate 300 and / or the shell 100 are provided with an explosion-proof pattern 310, which is used to rupture when the pressure inside the battery cell 200 rises to a threshold value to release the internal pressure of the battery cell 200, thereby preventing the battery cell 200 from exploding and improving the safety of the energy storage device 10.

[0053] In another aspect, the present application further provides an electrical device comprising the energy storage device 10 of any of the aforementioned embodiments. Specifically, the electrical device may be, but is not limited to, a wearable device such as a smartwatch or health monitor; a medical device such as a portable ultrasound machine or electrocardiograph; or a portable device such as a wireless tracker or smart key.

[0054] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An energy storage device, characterized in that: The energy storage device comprises: A housing, the housing having a receiving cavity and a first side wall, wherein the first side wall is provided with a first hole; A battery cell, the battery cell being installed in the accommodating cavity; a cover plate, the cover plate being used to cover the shell and seal the accommodating cavity; a first electrode, the first electrode having a first protrusion, the first electrode being connected to a surface of the first side wall facing the accommodating cavity and being electrically connected to the battery cell, the first protrusion being clamped in the first hole, and the first protrusion protruding from the surface of the first side wall away from the accommodating cavity by a preset length, or the first protrusion being flush with the surface of the first side wall away from the accommodating cavity; A second pole is connected to the first side wall.

2. The energy storage device according to claim 1, characterized in that The shell has a flange along its circumference. When the cover plate is arranged on the shell, the cover plate and the flange are attached to and fixed to each other.

3. The energy storage device according to claim 2, characterized in that The cover plate and the flange are fixed to each other by laser welding.

4. The energy storage device according to claim 1, characterized in that The first pole includes a first metal sheet and an insulating sheet, the first protrusion is arranged on the first metal sheet, the insulating sheet is provided with a first assembly hole, the insulating sheet is used to be fitted and fixed on the surface of the first side wall facing the accommodating cavity, and the first assembly hole is positioned relative to the first hole position, the first metal sheet is fitted to the insulating sheet, and the first protrusion passes through the first assembly hole.

5. The energy storage device according to claim 4, characterized in that The first pole also includes a second metal sheet, which is provided with a second assembly hole. The second metal sheet is used to be attached and fixed to the surface of the first side wall facing the accommodating cavity. The insulating sheet is attached to the second metal sheet, and the first assembly hole, the second assembly hole and the first hole are relatively positioned. The first metal sheet is attached to the insulating sheet, and the first protrusion passes through the first assembly hole and the second assembly hole.

6. The energy storage device according to claim 5, characterized in that The second metal sheet and the surface of the first side wall facing the accommodating cavity are fixed to each other by laser welding.

7. The energy storage device according to claim 1, characterized in that The first side wall is further provided with a second hole, which is used to allow electrolyte to be injected into the accommodating cavity. The energy storage device further includes a sealing nail, which is used to seal the second hole.

8. The energy storage device according to claim 1, characterized in that The cover plate and / or the shell are provided with explosion-proof patterns.

9. The energy storage device according to claim 1, characterized in that The thickness of the first pole ranges from 0.1 mm to 0.5 mm.

10. An electrical device, characterized in that: The electrical equipment includes the energy storage device according to any one of claims 1 to 9.

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