Battery and method for manufacturing a battery

Abstract

The application relates to the technical field of batteries, and discloses a battery and a manufacturing method thereof. The battery comprises a liquid injection hole and a positioning part. The liquid injection hole has a first center point, the positioning part is formed with a second center point, and the first center point and the second center point have a preset distance, so that the first center point is determined through the second center point. The liquid injection hole has the first center point, the positioning part is formed with the second center point, and the first center point and the second center point have the preset distance. Even if crystals are formed on the liquid injection hole during electrolyte injection, the first center point of the liquid injection hole cannot be directly determined, but the second center point can be accurately determined due to the existence of the positioning part, and the first center point can be accurately determined through the preset relationship between the first center point and the second center point, so that accurate positioning of the liquid injection hole is completed, the accurate sealing of the liquid injection hole in the subsequent process is guaranteed, and the safe use performance and the manufacturing efficiency of the battery are improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a battery and a method for manufacturing the battery. Background Technology

[0002] In related technologies, batteries can inject internal electrolyte through an injection hole. During the electrolyte injection process, crystals may form on the injection hole. The presence of crystals may affect the accuracy of the subsequent sealing pins for sealing the injection hole. Summary of the Invention

[0003] This invention provides a battery and a method for manufacturing the battery, so as to improve the performance of the battery.

[0004] According to a first aspect of the present invention, a battery is provided, including an injection hole and a positioning portion, the injection hole having a first center point, the positioning portion having a second center point, and a preset distance between the first center point and the second center point, so as to determine the first center point by means of the second center point.

[0005] The battery of this invention includes an injection hole and a positioning part. The injection hole is used to inject electrolyte into the battery, while the positioning part serves as an auxiliary positioning structure during the positioning process of the injection hole, thereby achieving precise positioning of the injection hole. The injection hole has a first center point, and the positioning part has a second center point. There is a preset distance between the first center point and the second center point. Even if crystals form on the injection hole during electrolyte injection, making it impossible to directly determine the first center point, the presence of the positioning part allows for precise determination of the second center point. Furthermore, the preset relationship between the first and second center points allows for precise determination of the first center point, thus completing the precise positioning of the injection hole. This ensures accurate sealing of the injection hole subsequently, thereby improving the battery's safe operation and manufacturing efficiency.

[0006] According to a second aspect of the present invention, a method for manufacturing a battery is provided, comprising:

[0007] Electrolyte is injected into the battery through the injection hole on the battery, and the injection hole has a first center point;

[0008] The second center point formed by the positioning part is determined by the positioning part on the battery;

[0009] The location of the first center point is determined based on the preset distance between the second center point and the first center point;

[0010] Install the sealing structure into the injection hole according to the location of the first center point.

[0011] The battery manufacturing method of this invention includes injecting electrolyte into the battery through an injection hole, determining a second center point formed by a positioning part on the battery, and setting a preset distance between the second center point and the first center point. Even if crystals form on the injection hole during the electrolyte injection process, making it impossible to directly determine the first center point of the injection hole, the presence of the positioning part allows for precise determination of the second center point. Furthermore, the preset relationship between the first and second center points allows for accurate determination of the first center point, thus completing the precise positioning of the injection hole. This ensures that the sealing structure is accurately installed inside the injection hole, thereby achieving a reliable seal for the injection hole and improving the battery's safe operation and manufacturing efficiency. Attached Figure Description

[0012] To better understand this disclosure, reference may be made to the embodiments shown in the following figures. Components in the figures are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of this disclosure. Additionally, related elements or components may have different arrangements as known in the art. Furthermore, in the figures, the same reference numerals denote the same or similar components in various figures. Wherein:

[0013] Figure 1 This is a partial structural schematic diagram of a battery according to a first exemplary embodiment;

[0014] Figure 2 This is a partial structural schematic diagram of a battery with a sealed structure according to a first exemplary embodiment;

[0015] Figure 3 This is a partial structural schematic diagram of a battery according to a second exemplary embodiment;

[0016] Figure 4 This is a partial structural schematic diagram of a battery according to a third exemplary embodiment;

[0017] Figure 5 This is a partial cross-sectional structural schematic diagram of a battery according to an exemplary embodiment;

[0018] Figure 6 This is a partial cross-sectional structural schematic diagram of a battery according to another exemplary embodiment;

[0019] Figure 7 This is a schematic flowchart illustrating a method for manufacturing a battery according to an exemplary embodiment.

[0020] The annotations in the attached figures are explained as follows:

[0021] 10. Injection hole; 20. Positioning part; 21. Sub-positioning section; 30. Sealing structure; 40. Battery casing. Detailed Implementation

[0022] The technical solutions in the exemplary embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of this disclosure.

[0023] In the description of this disclosure, unless otherwise expressly specified and limited, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term “multiple” refers to two or more; and the term “and / or” includes any and all combinations of one or more associated listed items. In particular, references to “the / described” object or “a” object are also intended to indicate one of a possible plurality of such objects.

[0024] Unless otherwise specified or stated, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0025] Furthermore, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" described in the exemplary embodiments of this disclosure are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the exemplary embodiments of this disclosure. It should also be understood that, in the context of a reference to an element or feature being connected to another element(s) "upper," "lower," "inner," or "outer," it can be directly connected to the other element(s) "upper," "lower," "inner," or "outer," or indirectly connected to the other element(s) "upper," "lower," "inner," or "outer" through an intermediate element.

[0026] One embodiment of the present invention provides a battery, please refer to... Figures 1 to 6 The battery includes an injection hole 10 and a positioning part 20. The injection hole 10 has a first center point, and the positioning part 20 has a second center point. There is a preset distance between the first center point and the second center point so as to determine the first center point by means of the second center point.

[0027] An embodiment of the present invention provides a battery including an injection hole 10 and a positioning part 20. The injection hole 10 is used to inject electrolyte into the battery, and the positioning part 20 serves as an auxiliary positioning structure during the positioning process of the injection hole 10, thereby achieving precise positioning of the injection hole 10. The injection hole 10 has a first center point, and the positioning part 20 has a second center point. There is a preset distance between the first center point and the second center point. Even if crystals form on the injection hole 10 during the electrolyte injection process, making it impossible to directly determine the first center point of the injection hole 10, the presence of the positioning part 20 allows for precise determination of the second center point. Furthermore, the preset relationship between the first and second center points allows for precise determination of the first center point, thus completing the precise positioning of the injection hole 10. This ensures the subsequent precise sealing of the injection hole 10, thereby improving the battery's safe operation and manufacturing efficiency.

[0028] It should be noted that during the electrolyte injection process, the electrolyte may crystallize due to electrolysis, obscuring the outer periphery of the injection hole 10. When photographing the outer periphery of the injection hole 10, the outline is disrupted due to electrolyte crystallization, affecting the center positioning of the injection hole 10 and consequently its sealing accuracy. For example, if the injection hole 10 is pre-sealed with sealing nails and then welded shut with the nail caps, the sealing nails, being elastic, can deform, resulting in inaccurate positioning. The sealing nails can also be assembled with the injection hole 10. Furthermore, when using riveted sealing nails or other metal nails for sealing, inaccurate positioning of the injection hole 10 can cause the metal sealing nails to scrape against the battery's interior, potentially generating metal shavings and posing a risk of internal short circuit. In this embodiment, by setting the positioning part 20, the second center point of the positioning part 20 can be obtained, and there is a preset positional relationship between the first center point and the second center point, that is, there is a preset distance between the first center point and the second center point. Thus, after determining the second center point, the position of the first center point can be determined, thereby achieving precise positioning of the injection hole 10, thereby ensuring that the metal structure can reliably seal the injection hole 10.

[0029] There is a preset distance between the first center point and the second center point. After the injection hole 10 and the positioning part 20 are formed on the battery, the injection hole 10 and the positioning part 20 respectively have a first center point and a second center point. The relationship between the first center point and the second center point is determined. That is, after the battery is manufactured, the positional relationship between the injection hole 10 and the positioning part 20 is uniquely determined. Therefore, the preset distance between the first center point and the second center point is a fixed value. For example, the preset distance between the first center point and the second center point can be 0, that is, the first center point and the second center point coincide. This can improve the positioning efficiency of the injection hole 10 to a certain extent, thereby improving the battery manufacturing efficiency and ensuring the accurate positioning of the injection hole 10. Alternatively, the preset distance may not be equal to 0. For example, the preset distance may include a certain value A(x, y) in the plane coordinate system. For example, the value of the x-axis is 0 and the value of the y-axis is 1, or the value of the x-axis is 1 and the value of the y-axis is 0, or the value of the x-axis is 1 and the value of the y-axis is 1, etc. There is no limitation here. When sealing the injection hole 10, it is only necessary to accurately determine the second center point of the positioning part 20, and then obtain the first center point of the injection hole 10 based on the known positional relationship between the injection hole 10 and the positioning part 20.

[0030] In one embodiment, there is one positioning part 20, which includes an arc structure. The arc structure extends around the injection hole 10 in an arc direction, and the center of the arc structure is the second center point. That is, by obtaining the center of the arc structure, the first center point is determined according to the preset distance between the first center point and the second center point, so as to achieve precise positioning of the injection hole 10.

[0031] The arc structure extends around the injection hole 10 in an arc direction, meaning the arc structure is set around the injection hole 10. The arc structure can form a circumferentially closed circle, such as... Figure 3 As shown, or, the arc structure can form a circumferentially non-closed arc, and by obtaining the image information of the arc structure, the center of the arc structure can be fitted, thereby accurately obtaining the second center point, and further determining the first center point.

[0032] In one embodiment, the positioning part 20 includes a straight structure. The straight structure extends around the injection hole 10 in at least two straight directions. The midpoint of the straight structure is the second center point. That is, by obtaining the midpoint of the straight structure, the first center point is determined according to the preset distance between the first center point and the second center point, thereby achieving precise positioning of the injection hole 10.

[0033] The straight structure extends around the injection hole 10 in at least two straight directions; that is, the straight structure can be set on the outer periphery of the injection hole 10, and the straight structure can form a circumferentially closed rectangle, such as... Figure 4 As shown, in this case, the midpoint of the rectangle is the intersection of its two diagonals, which is the second center point. Alternatively, the straight-line structure can form a circumferentially open structure. For example, the straight-line structure can be L-shaped, and the lines connecting the two ends of the straight-line structure can form an isosceles right triangle, in which case the midpoint of the lines connecting the two ends of the straight-line structure is the second center point. The straight-line structure can also be U-shaped, and the lines connecting the two ends of the straight-line structure can form a rectangle, in which case the midpoint of the rectangle is the intersection of its two diagonals, which is the second center point.

[0034] It should be noted that there is only one positioning part 20. The positioning part 20 can be a recessed structure, a raised structure, or a marking line, etc., which is not limited here.

[0035] In one embodiment, such as Figure 1 and Figure 2 As shown, the positioning unit 20 includes multiple independent sub-positioning segments 21, each of which has a center point.

[0036] The lines connecting the center points of each sub-positioning segment 21 can form a circle, and the center of the circle is the second center point. That is, multiple sub-positioning segments 21 can be located on a circle, and the first center point is determined by the center of the circle, so as to achieve precise positioning of the injection hole 10. For example, there can be three sub-positioning segments 21, and the center points of the three sub-positioning segments 21 can fit a circle, and the center of this circle is the second center point.

[0037] Each sub-positioning segment 21 has a center point. For example, the sub-positioning segment 21 can be a circle, rectangle, triangle, etc. The sub-positioning segment 21 can determine one center point, while multiple center points can fit a circle, and the circle's dot is the second center point.

[0038] In one embodiment, the positioning unit 20 includes multiple independent sub-positioning segments 21, each of which has a center point. The lines connecting the center points of each sub-positioning segment 21 can form a polygon, the midpoint of which is the second center point. The polygon has n sides, where n≥3. That is, multiple sub-positioning segments 21 can be located on a polygon. The first center point is determined by the midpoint of the polygon, thereby achieving precise positioning of the injection hole 10. For example, there can be four sub-positioning segments 21, and the center points of the four sub-positioning segments 21 can fit a rectangle, the midpoint of which is the second center point.

[0039] Each sub-positioning segment 21 has a center point. For example, the sub-positioning segment 21 can be a circle, rectangle, triangle, etc. The sub-positioning segment 21 can determine one center point, while multiple center points can fit a polygon. For example, there can be three sub-positioning segments 21, and the center points of the three sub-positioning segments 21 can fit a triangle. The triangle can be a right-angled isosceles triangle or an equilateral triangle.

[0040] In one embodiment, the sub-positioning segment 21 is a protrusion, a recess, or a mark, so that a circle or polygon can be fitted by multiple sub-positioning segments 21 to determine the second center point, thereby determining the first center point and achieving precise positioning of the injection hole 10.

[0041] Protrusions and depressions can form circles, arcs, or polygons, and markings can also form circles, arcs, or polygons. There are no restrictions here. The key point is that the center point can be determined, and a second center point can be fitted from it.

[0042] In one embodiment, the opening area of ​​the recessed opening end is larger than the cross-sectional area of ​​the recessed bottom wall, which not only facilitates the forming of the recess, but also allows for the formation of a shadow to facilitate positioning when the positioning part 20 is positioned by taking a picture.

[0043] In one embodiment, the recess includes a conical hole segment or a frustum hole segment, such that the opening area of ​​the recess is not less than the cross-sectional area at each position of the recess, that is, the top area of ​​the recess is larger and the bottom area of ​​the recess is smaller. This not only facilitates the forming of the recess, but also allows for the formation of a shadow when positioning the positioning part 20 using photography, which facilitates positioning.

[0044] like Figure 5 As shown, the recess includes a frustum-shaped hole section, and the top opening of the recess is larger than the bottom opening. For example... Figure 6 As shown, the depression includes a tapered hole segment.

[0045] In one embodiment, the opening diameter of the recess is 0.5mm-1.5mm, which not only ensures that the recess has a sufficient shaded area for easy positioning, but also avoids the recess area being too large and occupying too much battery area, thereby ensuring the structural strength of the battery.

[0046] The opening of the recess is circular, and the diameter of the recess can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 9mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm, etc.

[0047] In one embodiment, the diameter of the bottom of the recess is less than one-third of the diameter of the opening of the recess, thereby enabling the recess to form a frustum-shaped hole segment. When photographing the frustum-shaped hole segment, accurate image information can be obtained, thereby accurately fitting the second center point.

[0048] In one embodiment, the angle between the sidewall of the recess and the centerline of the recess is 30°-60°, which allows the recess to form a conical or frustum-shaped hole segment, thereby enabling good image information to be obtained when photographing the recess, and thus accurately determining the location information of the recess.

[0049] The angle between the sidewall of the depression and the center line of the depression can be 30°, 31°, 32°, 35°, 38°, 40°, 45°, 50°, 55°, 58°, 59° or 60°, etc.

[0050] In one embodiment, the depth of the depression is 0.1mm-1.2mm, which not only allows for accurate acquisition of image information of the depression, but also avoids the depression depth being too large and affecting the structural strength of the battery.

[0051] Furthermore, the depth of the indentation is 0.4mm-0.5mm, which ensures that multiple indentations can fit a second center point and that the indentation will not damage the strength of the battery structure.

[0052] The depth of the indentation can be 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.15mm, or 1.2mm, etc.

[0053] In one embodiment, the distance between the center point of the sub-positioning segment 21 and the first center point is 4mm-15mm. This can prevent the distance between the sub-positioning segment 21 and the injection hole 10 from being too close, which would cause electrolyte crystallization and block the sub-positioning segment 21. It can also prevent the sub-positioning segment 21 from being too far away from the injection hole 10, which would make it inconvenient to form the sub-positioning segment 21. Furthermore, it can prevent the sub-positioning segment 21 from being too close to the outer circumferential edge of the battery, which would damage the structural strength of the battery.

[0054] The distance between the center point of the sub-positioning segment 21 and the first center point can be 4mm, 4.1mm, 4.2mm, 4.5mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 14.5mm, 14.8mm, 14.9mm, or 15mm, etc.

[0055] It should be noted that when there is only one positioning part 20, the positioning part 20 can be a recess, and the depth of the recess can be 0.1mm-1.2mm. Furthermore, the depth of the recess can be 0.4mm-0.5mm.

[0056] In one embodiment, such as Figure 2 As shown, the battery also includes a sealing structure 30, at least a portion of which is sealed within the injection hole 10. That is, after the electrolyte is injected into the battery through the injection hole 10, the injection hole 10 can be sealed by the sealing structure 30. During the sealing process of the sealing structure 30, the second center point can be fitted by the positioning part 20, thereby determining the first center point of the injection hole 10, thus achieving precise positioning of the injection hole 10 and facilitating the accurate installation of the sealing structure 30 into the injection hole 10.

[0057] In one embodiment, the sealing structure 30 may include an elastic structure, for example, the sealing structure 30 may include a sealing nail.

[0058] In one embodiment, the sealing structure 30 may include a metal component, which may be inserted into the injection hole 10 or welded to the battery to achieve a reliable seal on the injection hole 10. To achieve a seal on the injection hole 10 using a metal component, it is necessary to ensure the precise positioning of the injection hole 10. Therefore, in this embodiment, the second center point can be fitted by the positioning part 20 first, thereby determining the first center point of the injection hole 10 and achieving precise positioning of the injection hole 10.

[0059] In one embodiment, the sealing structure 30 is a rivet sealing structure, so that after the sealing structure 30 is installed into the injection hole 10, the main body of the sealing structure 30 is deformed by pulling the rivet core, thereby achieving reliable contact with the injection hole 10 and thus achieving reliable sealing of the injection hole 10.

[0060] It should be noted that the rivet sealing structure can be a rivet structure in related technologies. For example, the rivet structure can include a rivet core and a body. The rivet core is located inside the body. After the rivet structure is installed into the injection hole 10, the body can be deformed by pulling the rivet core, thereby making reliable contact with the injection hole 10 and achieving a reliable seal on the injection hole 10.

[0061] In one embodiment, the injection hole 10 and the positioning part 20 are disposed on the same surface of the battery, which not only improves the space utilization of the battery, but also facilitates the determination of the positions of the injection hole 10 and the positioning part 20.

[0062] In one embodiment, such as Figures 1 to 6 As shown, the battery includes a battery housing 40, an injection hole 10 and a positioning part 20, all of which are disposed on the battery housing 40. This allows the positioning part 20 to assist the injection hole 10 in positioning, thereby accurately positioning the injection hole 10 and ensuring that the sealing structure 30 can be accurately fixed inside the injection hole 10.

[0063] The injection hole 10 can penetrate the battery housing 40, where a battery cell is disposed, thereby enabling reliable electrolyte injection into the battery. A positioning part 20 is disposed on the battery housing 40. The positioning part 20 can be a protrusion, a recess, or a mark, etc. In some embodiments, the recess can be a groove, or it is possible that the recess can be a through hole. The battery housing 40 may include a cover plate, and the injection hole 10 and the positioning part 20 are disposed on the cover plate.

[0064] A battery can include a cell and an electrolyte, and is the smallest unit capable of electrochemical reactions such as charging / discharging. A cell is a unit formed by winding or laminating stacked portions, which include a first electrode, a separator, and a second electrode. When the first electrode is the positive electrode, the second electrode is the negative electrode. The polarities of the first and second electrodes can be interchanged.

[0065] The battery is a stacked battery, which is not only convenient to assemble, but also allows for the production of longer batteries. Specifically, the cell is a stacked cell, which has a first electrode, a second electrode with the opposite electrical charge to the first electrode, and a separator between the first and second electrodes, thereby stacking multiple pairs of first and second electrodes to form a stacked cell.

[0066] Optionally, the battery can be a wound battery, which involves winding a first electrode, a second electrode with the opposite electrical charge to the first electrode, and a separator disposed between the first and second electrodes to obtain a wound battery cell.

[0067] One embodiment of the present invention also provides a battery pack, the battery pack including the batteries.

[0068] An embodiment of the present invention provides a battery pack including a battery, which includes an injection hole 10 and a positioning part 20. The injection hole 10 is used to inject electrolyte into the battery, and the positioning part 20 serves as an auxiliary positioning structure during the positioning process of the injection hole 10, thereby achieving precise positioning of the injection hole 10. The injection hole 10 has a first center point, and the positioning part 20 has a second center point. There is a preset distance between the first center point and the second center point. Even if crystals form on the injection hole 10 during the electrolyte injection process, making it impossible to directly determine the first center point of the injection hole 10, the presence of the positioning part 20 allows for precise determination of the second center point. Furthermore, the preset relationship between the first center point and the second center point allows for precise determination of the first center point, thus completing the precise positioning of the injection hole 10. This ensures the subsequent precise sealing of the injection hole 10, thereby improving the safe operation and manufacturing efficiency of the battery pack.

[0069] In one embodiment, the battery assembly is a battery module or a battery pack.

[0070] The battery module includes multiple batteries, and may also include end plates and side plates for fixing the multiple batteries.

[0071] It should be noted that multiple batteries can be assembled into a battery module and then installed inside the battery box. These batteries can be secured using end plates and side plates. Alternatively, multiple batteries can be directly installed inside the battery box without needing to be grouped together; in this case, the end plates and side plates can be removed.

[0072] The battery can be a square battery, or a square prism battery. A square prism battery mainly refers to a prism shape, but it is not strictly limited that each side of the prism must be a straight line in the strict sense. The corners between the sides do not have to be right angles and can be rounded.

[0073] In some embodiments, it is not excluded that the battery can be a cylindrical battery.

[0074] An embodiment of the present invention also provides a method for manufacturing a battery; please refer to [reference needed]. Figure 7 The battery manufacturing methods include:

[0075] S101, electrolyte is injected into the battery through the injection hole 10 on the battery, and the injection hole 10 has a first center point;

[0076] S103, the second center point formed by the positioning part 20 on the battery is determined by the positioning part 20;

[0077] S105, determine the location of the first center point based on the preset distance between the second center point and the first center point;

[0078] S107, Install the sealing structure 30 into the injection hole 10 according to the location of the first center point.

[0079] A battery manufacturing method according to an embodiment of the present invention includes injecting electrolyte into the battery through an injection hole 10, determining a second center point formed by a positioning part 20 on the battery, and a preset distance between the second center point and the first center point. Even if crystals form on the injection hole 10 during the electrolyte injection process, making it impossible to directly determine the first center point of the injection hole 10, the presence of the positioning part 20 allows for precise determination of the second center point. Furthermore, the preset relationship between the first and second center points allows for precise determination of the first center point, thereby completing the precise positioning of the injection hole 10. This ensures that the sealing structure 30 is precisely installed inside the injection hole 10, achieving a reliable seal for the injection hole 10 and improving the battery's safe operation and manufacturing efficiency.

[0080] In one embodiment, determining the second center point formed by the positioning part 20 on the battery includes: acquiring image information of the positioning part 20 using a vision inspection system, and fitting the second center point based on the image information, so as to determine the location of the first center point based on the second center point, thereby ensuring that the sealing structure 30 is accurately installed in the injection hole 10.

[0081] The visual inspection system may include a camera, which can acquire image information of the positioning part 20 by taking pictures of the battery. For example, the positioning part 20 may be a single unit, which may include an arc structure or a straight line structure. The second center point can be fitted by the arc structure or the straight line structure. The image information may have a reference position point, which may correspond to a certain fixed position of the battery. Therefore, after the second center point is fitted, the specific position of the second center point on the battery can be obtained according to the certain fixed position of the battery. Subsequently, the position of the first center point can be accurately obtained according to the positional relationship between the first center point and the second center point, so as to facilitate the precise installation of the sealing structure 30 into the injection hole 10.

[0082] The camera and sealing structure 30 of the vision inspection system can be mounted on the same robotic arm structure. After the vision inspection system acquires image information and analyzes it, it determines the precise position of the second center point, which allows the robotic arm structure to move a fixed distance to the position of the injection hole 10, thereby achieving precise installation of the sealing structure 30 inside the injection hole 10.

[0083] It should be noted that the relevant structure of the positioning part 20 can be referenced from the relevant structure of the battery described above, so that the second center point of the positioning part 20 can be accurately fitted.

[0084] In one embodiment, the method of manufacturing a battery further includes forming an injection hole 10 and a positioning portion 20 on the same surface of the battery.

[0085] In one embodiment, the battery manufacturing method further includes: forming an injection hole 10 and a positioning part 20 on the battery casing 40, and making a preset distance between a first center point and a second center point, so that when the injection hole 10 is subsequently sealed, the position of the first center point can be determined according to the preset distance determined when the injection hole 10 and the positioning part 20 are formed, thereby ensuring that the sealing structure 30 is accurately installed in the injection hole 10.

[0086] The battery casing 40 may include a cover plate, on which a liquid injection hole 10 is formed. A positioning part 20 may be formed according to the position of the liquid injection hole 10, such that there is a preset distance between the first center point and the second center point. For example, the first center point and the second center point coincide, or the first center point and the second center point have a distance greater than 0. Thus, after the position of the second center point on the cover plate is determined, the precise position of the first center point of the liquid injection hole 10 can be obtained.

[0087] The specific structural form of the positioning part 20 can be referenced from the relevant structural forms of the battery described above, and is not limited here. The positioning part 20 can be formed by processes such as material addition, material removal, and stamping, and is not limited here.

[0088] In one embodiment, installing the sealing structure 30 into the injection hole 10 according to the location of the first center point includes: sealing the sealing structure 30 into the injection hole 10 using a riveting sealing process, thereby ensuring that the sealing structure 30 reliably seals the injection hole 10 and preventing battery leakage.

[0089] Specifically, the riveting structure may include a rivet core and a main body, with the rivet core located inside the main body. After the position of the injection hole 10 is determined by the positioning part 20, the riveting structure is installed into the injection hole 10, and the main body can be deformed by pulling the rivet core, thereby making reliable contact with the injection hole 10 and achieving a reliable seal for the injection hole 10.

[0090] In some embodiments, the sealing structure 30 may also include an elastic structure that can be interference-fitted into the injection hole 10. Alternatively, the sealing structure 30 may include a metal component that can be welded to the battery casing 40.

[0091] In one embodiment, the battery manufacturing method can be used to form the battery described above. The relevant structure of the battery in this embodiment can refer to the specific structure of the battery described above, and will not be repeated here.

[0092] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and exemplary embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

[0093] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of protection of this disclosure is limited only by the appended claims.

Claims

1. A battery, characterized in that, The battery is a quadrangular prism battery or a cylindrical battery, including an injection hole (10) and a positioning part (20). The injection hole (10) has a first center point, and the positioning part (20) has a second center point. There is a preset distance between the first center point and the second center point so as to determine the first center point through the second center point. The positioning part (20) includes a plurality of mutually independent sub-positioning segments (21), and each of the sub-positioning segments (21) has a center point. The lines connecting the center points of each of the sub-positioning segments (21) can form a circle, with the center of the circle being the second center point; or, the lines connecting the center points of each of the sub-positioning segments (21) can form a polygon, with the midpoint of the polygon being the second center point, and the number of sides of the polygon being n, where n≥3.

2. The battery according to claim 1, characterized in that, The first center point and the second center point coincide.

3. The battery according to claim 1 or 2, characterized in that, The sub-positioning segment (21) is a protrusion, a depression, or a mark.

4. The battery according to claim 3, characterized in that, The opening area at the recessed opening end is larger than the cross-sectional area of ​​the recessed bottom wall.

5. The battery according to claim 4, characterized in that, The opening diameter of the recess is 0.5mm-1.5mm.

6. The battery according to claim 4, characterized in that, The angle between the sidewall of the depression and the center line of the depression is 30°-60°.

7. The battery according to claim 3, characterized in that, The depth of the depression is 0.1mm-1.2mm.

8. The battery according to claim 1 or 2, characterized in that, The distance between the center point of the sub-positioning segment (21) and the first center point is 4mm-15mm.

9. The battery according to claim 1 or 2, characterized in that, The battery also includes a sealing structure (30), at least a portion of which is sealed within the injection hole (10); The sealing structure (30) includes a metal component.

10. The battery according to claim 9, characterized in that, The sealing structure (30) is a rivet sealing structure.

11. The battery according to claim 1 or 2, characterized in that, The injection hole (10) and the positioning part (20) are both located on the same surface of the battery.

12. The battery according to claim 11, characterized in that, The battery includes a battery housing (40), and the liquid injection hole (10) and the positioning part (20) are both disposed on the battery housing (40).

13. A battery, characterized in that, The battery is a quadrangular prism battery or a cylindrical battery, including an injection hole (10) and a positioning part (20). The injection hole (10) has a first center point, and the positioning part (20) has a second center point. There is a preset distance between the first center point and the second center point, so as to determine the first center point through the second center point. The positioning part (20) is one, and the positioning part (20) includes an arc structure. The arc structure extends around the injection hole (10) in an arc direction, and the center of the arc structure is the second center point; or, the positioning part (20) includes a straight structure. The straight structure extends around the injection hole (10) in at least two straight directions, and the midpoint of the straight structure is the second center point.

14. The battery according to claim 13, characterized in that, The first center point and the second center point coincide.

15. The battery according to claim 13 or 14, characterized in that, The battery also includes a sealing structure (30), at least a portion of which is sealed within the injection hole (10); The sealing structure (30) includes a metal component.

16. The battery according to claim 15, characterized in that, The sealing structure (30) is a rivet sealing structure.

17. The battery according to claim 13 or 14, characterized in that, The injection hole (10) and the positioning part (20) are both located on the same surface of the battery.

18. The battery according to claim 17, characterized in that, The battery includes a battery housing (40), and the liquid injection hole (10) and the positioning part (20) are both disposed on the battery housing (40).

19. A method for manufacturing a battery, characterized in that, include: Electrolyte is injected into the battery through the injection hole (10) on the battery, the injection hole (10) having a first center point; The second center point formed by the positioning part (20) on the battery is determined by the positioning part (20); The location of the first center point is determined based on the preset distance between the second center point and the first center point; The sealing structure (30) is installed in the injection hole (10) according to the location of the first center point; The positioning unit (20) includes multiple independent sub-positioning segments (21), each of which has a center point; The lines connecting the center points of each of the sub-positioning segments (21) can form a circle, with the center of the circle being the second center point; or, the lines connecting the center points of each of the sub-positioning segments (21) can form a polygon, with the midpoint of the polygon being the second center point, and the number of sides of the polygon being n, where n≥3.

20. The method for manufacturing a battery according to claim 19, characterized in that, Determining the second center point formed by the positioning part (20) on the battery includes: The image information of the positioning part (20) is obtained using a visual inspection system, and the second center point is fitted based on the image information.

21. The method for manufacturing a battery according to claim 19, characterized in that, The method for manufacturing the battery further includes: The injection hole (10) and the positioning part (20) are formed on the battery housing (40), and the preset distance is made between the first center point and the second center point.

22. The method for manufacturing a battery according to claim 19, characterized in that, The first center point and the second center point coincide.

23. The method for manufacturing a battery according to claim 19, characterized in that, The sealing structure (30) is installed in the injection hole (10) according to the location of the first center point, including: The sealing structure (30) is sealed inside the injection hole (10) using a riveting sealing process.

24. A method for manufacturing a battery, characterized in that, include: Electrolyte is injected into the battery through the injection hole (10) on the battery, the injection hole (10) having a first center point; The second center point formed by the positioning part (20) on the battery is determined by the positioning part (20); The location of the first center point is determined based on the preset distance between the second center point and the first center point; The sealing structure (30) is installed in the injection hole (10) according to the location of the first center point; The positioning part (20) is one, and the positioning part (20) includes an arc structure. The arc structure extends around the injection hole (10) in an arc direction, and the center of the arc structure is the second center point; or, the positioning part (20) includes a straight structure. The straight structure extends around the injection hole (10) in at least two straight directions, and the midpoint of the straight structure is the second center point.

25. The method for manufacturing a battery according to claim 24, characterized in that, Determining the second center point formed by the positioning part (20) on the battery includes: The image information of the positioning part (20) is obtained using a visual inspection system, and the second center point is fitted based on the image information.

26. The method for manufacturing a battery according to claim 24, characterized in that, The method for manufacturing the battery further includes: The injection hole (10) and the positioning part (20) are formed on the battery housing (40), and the preset distance is made between the first center point and the second center point.

27. The method for manufacturing a battery according to claim 24, characterized in that, The first center point and the second center point coincide.

28. The method for manufacturing a battery according to claim 24, characterized in that, The sealing structure (30) is installed in the injection hole (10) according to the location of the first center point, including: The sealing structure (30) is sealed inside the injection hole (10) using a riveting sealing process.

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