Battery and battery manufacturing method

Abstract

The invention discloses a battery and a battery manufacturing method, and the battery comprises a housing which is provided with a storage cavity; the battery cell is arranged in the storage cavity, and the battery cell comprises a first tab; the first current collecting plate is arranged in the storage cavity, and the first current collecting plate is welded to the first tab; and the cover plate is welded to the first current collecting disc, and the cover plate is connected to the shell in an insulating mode so as to seal the opening of the storage cavity. The battery provided by the invention can have relatively low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery and a battery manufacturing method. Background Art

[0002] In the related art, a cylindrical battery includes a shell, a cover plate, a battery cell, a current collecting plate and a pole. The shell is provided with a storage cavity, the battery cell and the current collecting plate are arranged in the storage cavity, and the cover plate is connected to the shell to close the storage cavity. The battery cell and the current collecting plate are welded, the current collecting plate and the pole are welded, the pole is insulated and connected to the cover plate, and the pole can realize the conduction between the battery cell and the outside world. Since the existing cylindrical battery has many parts, this will lead to a high manufacturing cost of the cylindrical battery. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery that can have a lower cost.

[0004] The invention also provides a battery manufacturing method.

[0005] A battery according to a first aspect of the present invention comprises: A housing having a storage cavity; A battery cell is disposed in the storage cavity, and the battery cell includes a first pole tab; A first current collecting plate is disposed in the storage cavity, and the first current collecting plate is welded to the first pole lug; A cover plate is welded to the first current collecting plate, and the cover plate is insulated and connected to the shell to close the opening of the storage cavity.

[0006] The battery according to the embodiment of the present invention has at least the following beneficial effects: the first current collecting disk is respectively connected to the first pole ear and the cover plate, so as to realize the electrical connection between the first pole ear and the cover plate, that is, the cover plate will become the positive electrode or negative electrode of the battery. In the prior art, after the first current collecting disk is connected to the first pole ear, the first current collecting disk is connected to the pole column, and the cover plate closes the storage cavity of the shell. In the present application, the pole column is omitted. By connecting the first current collecting disk to the first pole ear and the cover plate, respectively, the cover plate can not only close the storage cavity of the shell, but also act as the pole column. In this way, after the pole column is omitted, the battery can have a lower cost.

[0007] According to some embodiments of the present invention, in the battery, the first current collecting plate includes a first surface and a second surface opposite to each other, the first surface is welded to the first electrode tab, and the second surface is welded to the cap plate.

[0008] According to some embodiments of the battery of the present invention, a groove is provided on the second surface, the cover plate includes a main body and a protruding portion, the protruding portion is connected to the main body and protrudes relative to the main body, and the protruding portion is provided in the groove.

[0009] In the battery according to some embodiments of the present invention, the protrusion is welded to the groove wall of the groove.

[0010] In the battery according to some embodiments of the present invention, the battery cell is provided with an escape groove, and the protrusion and the groove are both arranged in the escape groove.

[0011] According to some embodiments of the battery of the present invention, along the height direction of the battery, the depth of the avoidance groove is L1, 1mm≤L1≤6mm.

[0012] According to some embodiments of the present invention, the battery further comprises an insulating member, and two sides of the insulating member are respectively connected to the cover plate and the shell.

[0013] In the battery according to some embodiments of the present invention, the insulating member is provided with a first mounting groove, the housing is provided with a second mounting groove, the cover plate is provided in the first mounting groove, and the insulating member is provided in the second mounting groove.

[0014] The battery manufacturing method according to the second aspect of the present invention comprises the following steps: Welding the battery cell and the first current collector; The first current collecting plate and the cover plate are welded.

[0015] The battery manufacturing method according to the embodiment of the present invention has at least the following beneficial effects: after welding the battery cell and the first current collecting disk, and welding the first current collecting disk and the cover plate, the electrical connection between the battery cell and the cover plate is realized, that is, the cover plate will become the positive electrode or negative electrode of the battery. In the prior art, after the first current collecting disk is connected to the battery cell, the first current collecting disk is connected to the pole, and the cover plate closes the storage cavity of the shell, while in the present application, the pole is omitted, and by connecting the first current collecting disk to the battery cell and the cover plate respectively, the cover plate can not only close the storage cavity of the shell, but also act as the pole. In this way, after omitting the pole, the battery manufactured by the battery manufacturing method can have a lower cost.

[0016] According to some embodiments of the battery manufacturing method of the present invention, the first current collecting plate includes a first surface and a second surface relative to each other, a groove is arranged on the second surface, the cover plate includes a main body and a protruding portion, the protruding portion is connected to the main body, and the protruding portion protrudes relative to the main body, and the battery manufacturing method further includes the following steps: welding the first surface to the first pole ear, arranging the protruding portion in the groove, and welding the protruding portion to the groove wall of the groove.

[0017] According to some embodiments of the battery manufacturing method of the present invention, the battery includes an insulating member and a shell, the shell having a storage cavity, and the battery manufacturing method also includes the following steps: surrounding the insulating member around the outer edge of the cover plate, placing the insulating member and the cover plate into the storage cavity, and squeezing the shell so that: the insulating member is provided with a first mounting groove, the shell is provided with a second mounting groove, the cover plate is provided in the first mounting groove, and the insulating member is provided in the second mounting groove.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 Schematic diagram of a battery according to some embodiments of the present invention; Figure 2 An exploded schematic diagram of a battery according to some embodiments of the present invention; Figure 3 Schematic cross-sectional views of batteries according to some embodiments of the present invention; Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 is a schematic diagram of a first current collecting plate in a battery according to some embodiments of the present invention; Figure 6 Schematic diagram of a cover plate in a battery according to some embodiments of the present invention; Figure 7 It is a schematic diagram of a cover plate, an insulating member and a shell before processing in a battery manufacturing method of some embodiments of the present invention.

[0020] Reference numerals: Battery 10, shell 100, storage cavity 110, second mounting groove 120, annular groove 130, battery cell 200, avoidance groove 210, first pole ear 220, first collecting plate 300, first surface 310, second surface 320, groove 330, second collecting plate 400, cover plate 500, main body 510, protrusion 520, injection hole 530, explosion-proof groove 540, insulating member 600, first mounting groove 610. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships 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 should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0026] In the related art, a cylindrical battery includes a shell 100, a cover plate 500, a battery cell 200, a current collecting plate and a pole. The shell 100 is provided with a storage cavity 110, the battery cell 200 and the current collecting plate are arranged in the storage cavity 110, and the cover plate 500 is connected to the shell 100, thereby closing the storage cavity 110. The battery cell 200 and the current collecting plate are welded, the current collecting plate and the pole are welded, the pole is insulated and connected to the cover plate 500, and the pole can realize the conduction between the battery cell 200 and the outside world. Since the existing cylindrical battery has more parts, this will lead to a higher manufacturing cost of the cylindrical battery. To this end, the present application proposes a battery 10.

[0027] Please refer to Figures 1 to 6 In some embodiments, the battery 10 includes: a housing 100, a battery cell 200, a first current collecting plate 300, a second current collecting plate 400 and a cover plate 500. The housing 100 has a storage cavity 110, and the material of the housing 100 can be a metal material, such as copper, aluminum and stainless steel. The shape of the housing 100 can be a cylinder, a cuboid, a cube or other irregular bodies. The battery cell 200 is disposed in the storage cavity 110, and the battery cell 200 includes a first pole ear 220 and a second pole ear (not shown). The battery cell 200 can be formed by winding a positive electrode sheet and a negative electrode sheet, wherein the first pole ear 220 can be connected to the positive electrode sheet, or the first pole ear 220 can be connected to the negative electrode sheet, and similarly, the second pole ear can be connected to the positive electrode sheet, or the second pole ear can be connected to the negative electrode sheet. That is, the first pole ear 220 can be a positive pole ear or a negative pole ear, and the second pole ear can be a positive pole ear or a negative pole ear. The first current collecting disc 300 and the second current collecting disc 400 are both arranged in the storage cavity 110, the first current collecting disc 300 is welded to the first pole ear 220, and the second current collecting disc 400 is welded to the second pole ear. Among them, the main function of the first current collecting disc 300 and the second current collecting disc 400 is to collect the current generated by the battery cell 200 and effectively conduct it to the external circuit. It is usually made of conductive materials, such as copper, aluminum and other metals, which have good conductivity and can ensure the smooth flow of current inside the battery 10. After the first current collecting disc 300 is welded to the first pole ear 220, the first current collecting disc 300 can collect the current of the positive electrode of the battery cell 200, and the second current collecting disc 400 can collect the current of the negative electrode of the battery cell 200. The first pole ear 220 can be located at the head of the battery cell 200, and the second pole ear can be located at the bottom of the battery cell 200, that is, the first current collecting disc 300 is located at the top of the storage cavity 110, and the second current collecting disc 400 is located at the bottom of the storage cavity 110. The cover plate 500 is welded to the first current collecting plate 300, and the second current collecting plate 400 is welded to the bottom wall of the storage cavity 110, so that the shell 100 is positively or negatively charged. In order to avoid a short circuit between the cover plate 500 and the shell 100, the cover plate 500 is insulated and connected to the shell 100, and the cover plate 500 closes the opening of the storage cavity 110.

[0028] Specifically, the first current collecting disk 300 is respectively connected to the first pole ear 220 and the cover plate 500, so as to realize the electrical connection between the first pole ear 220 and the cover plate 500, that is, the cover plate 500 will become the positive electrode or negative electrode of the battery 10. In the prior art, after the first current collecting disk 300 is connected to the first pole ear 220, the first current collecting disk 300 is connected to the pole, and the cover plate 500 closes the storage cavity 110 of the shell 100. In the present application, the pole is omitted. By connecting the first current collecting disk 300 to the first pole ear 220 and the cover plate 500, respectively, the cover plate 500 can not only close the storage cavity 110 of the shell 100, but also enable the cover plate 500 to act as a pole. In this way, after the pole is omitted, the battery 10 can have a lower cost.

[0029] It is further explained that in the prior art, the pole passes through the cover plate 500, and the pole and the cover plate 500 are insulated and connected. One end of the pole is located outside the storage cavity 110, and the other end of the pole is located in the storage cavity 110 and connected to the battery cell 200. Therefore, there is a part of the space in the storage cavity 110 that cannot be fully utilized. In the present application, after omitting the arrangement of the pole, the internal space of the storage cavity 110 can be fully utilized, the space utilization rate can be improved, and thus the energy density of the battery 10 can be improved. That is, the head of the battery cell 200 of the present application can be 3mm to 6mm larger than that of the existing battery cell 200, so that the energy density of the battery 10 is higher. Specifically, the battery 10 of the present application can have a higher energy density.

[0030] Further, the specific method of welding the first current collecting plate 300 to the cover plate 500 and the first electrode tab 220 is described below. Figure 4 In some embodiments, the first current collecting disc 300 includes a first surface 310 and a second surface 320 opposite to each other, the first surface 310 is welded to the first pole tab 220, and the second surface 320 is welded to the cover plate 500. Specifically, the shape of the first current collecting disc 300 can be a round cake shape, and the first current collecting disc 300 is located between the cover plate 500 and the battery cell 200. The first surface 310 is welded to the first pole tab 220, and the second surface 320 is welded to the cover plate 500, so as to realize the electrical connection between the cover plate 500 and the battery cell 200. Among them, there is a welding area on the first surface 310, and the welding area is a fan-shaped welding groove. From the center of the first current collecting disc 300 to the edge of the first current collecting disc 300, the area of ​​the welding groove gradually increases. After the welding groove adopts the above-mentioned setting and is connected to the first pole tab 220, the conductivity of the first current collecting disc 300 can be improved, the resistance can be reduced, and the heat generation can be reduced. Among them, the second current collecting disc 400 can also adopt the same structure as the first current collecting disc 300.

[0031] For further information, please refer to Figure 4In some embodiments, a groove 330 is provided on the second surface 320. That is, the groove 330 is formed when the second surface 320 is recessed downward. The cover plate 500 includes a body portion 510 and a protrusion 520, the protrusion 520 is connected to the body portion 510, and the protrusion 520 protrudes relative to the body portion 510. The shape of the body portion 510 can be circular, and the protrusion 520 can protrude relative to the body portion 510 around the edge of the body portion 510. The protrusion 520 is disposed in the groove 330. Specifically, when installing the first collecting plate 300 and the cover plate 500, the cover plate 500 can be conveniently positioned through the cooperation of the groove 330 and the protrusion 520. That is, when the cover plate 500 is installed on the first collecting plate 300, the installation of the first collecting plate 300 and the protrusion 520 can be completed by simply snapping the protrusion 520 into the groove 330, which can effectively improve work efficiency.

[0032] Further, after the protrusion 520 is arranged in the groove 330, the cover plate 500 and the first current collecting plate 300 can be conveniently positioned, so that the cover plate 500 and the first current collecting plate 300 can be welded. In order to effectively avoid welding through the first current collecting plate 300 and the cover plate 500 when welding the first current collecting plate 300 and the cover plate 500, the protrusion 520 can be welded to the groove wall of the groove 330. That is, please refer to Figure 4 In some embodiments, the protrusion 520 is welded to the groove wall of the groove 330. Specifically, after the second surface 320 is bent to form the groove 330, the sum of the wall thickness of the protrusion 520 and the groove 330 is equal to the thickness of the protrusion 520 plus the thickness of the two second surfaces 320. If the body 510 and the second surface 320 are welded, there may be a risk of welding through the cover plate 500 and the first current collecting plate 300, because the sum of the thickness of the body 510 and the second surface 320 is less than the sum of the wall thickness of the protrusion 520 and the groove 330. Therefore, after the protrusion 520 and the groove wall of the groove 330 are welded, the welding quality can be effectively improved, and the flow conductivity of the first current collecting plate 300 and the cover plate 500 can be improved.

[0033] Furthermore, the first current collecting plate 300 is welded to the first pole lug 220, and the cover plate 500 is welded to the first current collecting plate 300. Therefore, the first current collecting plate 300 and the cover plate 500 are both charged. In order to effectively avoid the contact between the groove 330 and the battery cell 200 and cause a short circuit, an avoidance groove 210 can be provided on the battery cell 200. For details, please refer to Figure 4In some embodiments, the battery cell 200 is provided with an avoidance groove 210, and the protrusion 520 and the groove 330 are both provided in the avoidance groove 210. The avoidance groove 210 can be provided at the edge of the battery cell 200. Similarly, the groove 330 can be provided at the edge of the first current collecting plate 300, and the protrusion 520 can be connected to the edge of the body 510. The avoidance groove 210 can be formed by the electrode sheet when it is flattened, that is, after the winding end of the electrode sheet is cut, the electrode sheet can be wound to form the avoidance groove 210, which can facilitate manufacturing and processing.

[0034] Further, in some embodiments, along the height direction of the battery 10, the depth of the avoidance groove 210 is L1, 1mm≤L1≤6mm. The depth of the avoidance groove 210 can be 1mm, 4mm or 6mm. Among them, the battery cell 200 can be in a "convex" shape, and the avoidance groove 210 surrounds the outer periphery of the battery cell 200. When the depth of the avoidance groove 210 is less than 1mm, due to the small depth of the avoidance groove 210, this may cause the first collector 300 to contact the battery cell 200, causing the risk of short circuit. When the depth of the avoidance groove 210 is greater than 6mm, the excessive depth of the avoidance groove 210 will cause a waste of space. Among them, it should be noted that after the avoidance groove 210 is set on the battery cell 200, the middle position of the battery cell 200 will have a part of active material (that is, the protruding part) compared with the conventional battery cell, which can make full use of the space inside the shell 100, thereby improving the energy density of the battery 10.

[0035] Furthermore, in some embodiments, both the first current collecting plate 300 and the cover plate 500 are provided with injection holes 530. The main function of the injection holes 530 on the cover plate 500 is to ensure that the liquid electrolyte can be accurately and efficiently injected into the battery 10 to form an ion channel, and to ensure that the battery 10 has enough lithium ions to migrate between the positive and negative electrodes during the charge and discharge process to achieve reversible circulation. When the electrolyte enters the storage cavity 110 from the injection hole 530 of the cover plate 500, the electrolyte will contact the first current collecting plate 300. In order to speed up the infiltration speed of the electrolyte, the injection hole 530 can be provided on the first current collecting plate 300.

[0036] For further information, please refer to Figure 6 In some embodiments, an explosion-proof groove 540 is provided on the cover plate 500. That is, after the cover plate 500 is scratched, an explosion-proof groove 540 can be formed on the cover plate 500. The wall thickness of the explosion-proof groove 540 is relatively thin. When the temperature inside the battery 10 is too high or the pressure is too high, the gas will break through the groove wall of the explosion-proof groove 540 and release the high-pressure gas into the external environment, thereby reducing the pressure inside the battery 10 and preventing the battery 10 from rupturing or exploding due to excessive internal pressure.

[0037] Furthermore, the above mentioned cover plate 500 and housing 100 are insulated and connected. The following describes a specific method of insulating and connecting the cover plate 500 and housing 100. Please refer to Figure 4 In some embodiments, the battery 10 further includes an insulating member 600, and the two sides of the insulating member 600 are respectively connected to the cover plate 500 and the shell 100. Specifically, the insulating member 600 may be silicone, rubber, or ceramic. After the two sides of the insulating member 600 are respectively connected to the cover plate 500 and the shell 100, the short circuit of the cover plate 500 and the shell 100 can be effectively avoided. That is, after the shell 100 is connected to the second current collecting disk 400, the shell 100 can be negatively charged, and after the cover plate 500 is connected to the first current collecting disk 300, the cover plate 500 can be positively charged. After the two sides of the insulating member 600 are respectively connected to the cover plate 500 and the shell 100, the positive and negative electrodes of the battery 10 can be effectively avoided from contacting. In addition, the two sides of the insulating member 600 are respectively connected to the cover plate 500 and the shell 100, which can be specifically that the two sides of the insulating member 600 are respectively bonded to the cover plate 500 and the shell 100. Alternatively, the two sides of the insulating member 600 are respectively connected to the cover plate 500 and the housing 100 . Specifically, the two sides of the insulating member 600 abut against the cover plate 500 and the housing 100 .

[0038] For further information, please refer to Figure 4 In some embodiments, the insulating member 600 is provided with a first mounting groove 610, the housing 100 is provided with a second mounting groove 120, the cover plate 500 is provided in the first mounting groove 610, and the insulating member 600 is provided in the second mounting groove 120. Specifically, after the cover plate 500 is provided in the first mounting groove 610, the groove wall of the first mounting groove 610 can clamp the edge of the cover plate 500, and after the insulating member 600 is provided in the second mounting groove 120, the groove wall of the second mounting groove 120 can clamp the insulating member 600. In this way, through the above arrangement, the insulation and sealing between the cover plate 500 and the housing 100 can be effectively improved.

[0039] The following describes a method for manufacturing the battery 10. In some embodiments, the method for manufacturing the battery 10 includes the following steps: S100, welding the battery cell 200 and the first current collecting plate 300; S200 , welding the first current collecting plate 300 and the cover plate 500 .

[0040] Specifically, after welding the battery cell 200 and the first current collecting plate 300, and welding the first current collecting plate 300 and the cover plate 500, the electrical connection between the battery cell 200 and the cover plate 500 is achieved, that is, the cover plate 500 will become the positive electrode or negative electrode of the battery 10. In the prior art, after the first current collecting plate 300 is connected to the battery cell 200, the first current collecting plate 300 is connected to the pole, and the cover plate 500 closes the storage cavity 110 of the shell 100. In the present application, the pole is omitted. By connecting the first current collecting plate 300 to the battery cell 200 and the cover plate 500 respectively, the cover plate 500 can not only close the storage cavity 110 of the shell 100, but also enable the cover plate 500 to act as the pole. In this way, after omitting the pole, the battery 10 manufactured by the battery 10 manufacturing method can have a lower cost.

[0041] For further information, please refer to Figure 4 In some embodiments, the first current collecting plate 300 includes a first surface 310 and a second surface 320 opposite to each other, a groove 330 is provided on the second surface 320, and the cover plate 500 includes a main body 510 and a protrusion 520, the protrusion 520 is connected to the main body 510, and the protrusion 520 protrudes relative to the main body 510. The manufacturing method of the battery 10 also includes the following steps: welding the first surface 310 to the first pole ear 220, setting the protrusion 520 in the groove 330, and welding the protrusion 520 to the groove wall of the groove 330. Specifically, the method of setting the protrusion 520 in the groove 330 can facilitate the positioning of the first current collecting plate 300 and the cover plate 500, thereby improving the working efficiency. In addition, after the protrusion 520 is set in the groove 330, the protrusion 520 and the groove wall of the groove 330 can be welded, which can effectively improve the welding quality. When welding the protrusion 520 and the groove wall of the groove 330 , the protrusion 520 and the groove wall of the groove 330 can be welded from the radial direction of the shell 100 , which can effectively avoid laser welding through the protrusion 520 and the groove wall of the groove 330 .

[0042] For further information, please refer to Figure 4 and Figure 7In some embodiments, the battery 10 includes an insulating member 600 and a shell 100, and the shell 100 has a storage cavity 110. The manufacturing method of the battery 10 also includes the following steps: surrounding the insulating member 600 on the outer edge of the cover plate 500, placing the insulating member 600 and the cover plate 500 in the storage cavity 110, and pressing the shell 100, so that: the insulating member 600 is provided with a first mounting groove 610, the shell 100 is provided with a second mounting groove 120, the cover plate 500 is arranged in the first mounting groove 610, and the insulating member 600 is arranged in the second mounting groove 120. Specifically, the insulating member 600 is initially annular and is sleeved on the outer edge of the cover plate 500. When the shell 100 is pressed, the insulating member 600 is also pressed, so that the insulating member 600 is provided with a first mounting groove 610, the shell 100 is provided with a second mounting groove 120, the cover plate 500 is arranged in the first mounting groove 610, and the insulating member 600 is arranged in the second mounting groove 120. Through the above installation method, on the one hand, the insulating member 600 can separate and insulate the cover plate 500 and the shell 100, and on the other hand, after the shell 100 is extruded, the groove wall of the second installation groove 120 can clamp the insulating member 600, thereby improving the sealing effect and insulation effect of the battery 10. In addition, this also has the characteristic of convenient processing. Figure 7 , Figure 7 The cover plate 500, the insulating member 600 and the shell 100 have not been processed yet. An annular groove 130 is first set on the shell 100. The annular groove 130 can facilitate the extrusion of the shell 100. Then the cover plate 500 and the insulating member 600 are placed in the storage cavity 110, and then inserted into the annular groove 130 by a machine, and then the end surface of the shell 100 is extruded (one end of the shell 100 is extruded toward the center of the shell 100). Under the action of pressure, the end surface of the shell 100 will form a second installation groove 120. That is, Figure 7 After the middle cover plate 500, the insulating member 600 and the housing 100 are processed, Figure 4 The look of.

[0043] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery, characterized in that include: A housing having a storage cavity; A battery cell is disposed in the storage cavity, and the battery cell includes a first pole tab; A first current collecting plate is disposed in the storage cavity, and the first current collecting plate is welded to the first pole lug; A cover plate is welded to the first current collecting plate, and the cover plate is insulated and connected to the shell to close the opening of the storage cavity.

2. The battery according to claim 1, characterized in that The first current collecting plate includes a first surface and a second surface opposite to each other, the first surface is welded to the first electrode tab, and the second surface is welded to the cover plate.

3. The battery according to claim 2, characterized in that The second surface is provided with a groove, the cover plate comprises a main body and a protruding portion, the protruding portion is connected to the main body and protrudes relative to the main body, and the protruding portion is provided in the groove.

4. The battery according to claim 3, characterized in that The protrusion is welded to the groove wall of the groove.

5. The battery according to claim 3, characterized in that The battery core is provided with an avoidance groove, and the protrusion and the groove are both arranged in the avoidance groove.

6. The battery according to claim 3, characterized in that Along the height direction of the battery, the depth of the avoidance groove is L1, 1mm≤L1≤6mm.

7. The battery according to claim 1, characterized in that The battery further includes an insulating member, two sides of which are respectively connected to the cover plate and the shell.

8. The battery according to claim 7, characterized in that The insulating member is provided with a first mounting groove, the housing is provided with a second mounting groove, the cover plate is provided in the first mounting groove, and the insulating member is provided in the second mounting groove.

9. A battery manufacturing method, characterized in that: The following steps are involved: Welding the battery cell and the first current collector; The first current collecting plate and the cover plate are welded.

10. The battery manufacturing method according to claim 9, characterized in that: The first current collecting plate includes a first surface and a second surface opposite to each other, a groove is arranged on the second surface, the cover plate includes a main body and a protruding portion, the protruding portion is connected to the main body, and the protruding portion protrudes relative to the main body, and the battery manufacturing method also includes the following steps: welding the first surface to the first pole ear, arranging the protruding portion in the groove, and welding the protruding portion to the groove wall of the groove.

11. The battery manufacturing method according to claim 9, characterized in that: The battery includes an insulating member and a shell, the shell having a storage cavity, and the battery manufacturing method further includes the following steps: surrounding the insulating member around the outer edge of the cover plate, placing the insulating member and the cover plate into the storage cavity, and squeezing the shell so that: the insulating member is provided with a first mounting groove, the shell is provided with a second mounting groove, the cover plate is provided in the first mounting groove, and the insulating member is provided in the second mounting groove.

Images