Battery and electrical device

Abstract

An electrical device, provided with a battery (100). The battery (100) comprises a metal housing (1), a battery cell (2), an electrically conductive column (3) and an abutting member (4), the battery cell (2) being accommodated in the metal housing (1), the battery cell (2) comprising a battery cell body (21), a first tab (22) and a second tab (23), a first end of the electrically conductive column (3) being conductively connected to the first tab (22), a second end of the electrically conductive column (3) being located outside the metal housing (1), the second tab (23) having a tab protrusion (231) protruding from the battery cell body (21), and the abutting member (4) being accommodated in the metal housing (1) and used to press the tab protrusion (231) against an inner surface of the metal housing (1), such that the tab protrusion (231) is in conductive contact with the metal housing (1).

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on September 26, 2023, with application number 202322624903.4 and titled “Batteries and Electrical Devices,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

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

[0004] In related art, a battery generally includes a casing and a cell housed within it. Both the positive and negative conductive posts extend into the casing and connect to the positive and negative tabs of the cell, respectively, leading out the positive and negative electrodes. The need for two conductive posts, one for the positive electrode and one for the negative electrode, and the need to connect them separately, increases the difficulty and cost of battery processing.

[0005] Summary of the Invention

[0006] The purpose of the present disclosure is to provide a battery and an electrical device to solve the above-mentioned problems in the related art.

[0007] In order to achieve the above-mentioned purpose, as a first aspect of the present disclosure, the present disclosure provides a battery, comprising a metal shell, a battery cell, a conductive column and a pressure piece, wherein the battery cell is accommodated in the metal shell, the battery cell comprises a battery cell body, a first pole tab and a second pole tab, the first end of the conductive column is conductively connected to the first pole tab, the second end of the conductive column is located outside the metal shell, the second pole tab has a pole tab protrusion protruding from the battery cell body, and the pressure piece is accommodated in the metal shell and is used to press the pole tab protrusion against the inner surface of the metal shell so that the pole tab protrusion is in conductive contact with the metal shell.

[0008] Optionally, the pressing member is elastic, a recessed portion recessed toward the interior of the metal shell is formed on the metal shell, and at least part of the tab protrusion is clamped between the pressing member and the recessed portion.

[0009] Optionally, the recess is formed as an annular recess extending along the circumference of the metal shell.

[0010] Optionally, a dimension of the recess along the axial direction of the metal shell is equal to or smaller than a dimension of the pressing member along the axial direction of the metal shell.

[0011] Optionally, a dimension of the recess along the axial direction of the metal shell is 1.6 mm to 2 mm, and a dimension of the pressing piece along the axial direction of the metal shell is 3.9 mm to 4.1 mm.

[0012] Optionally, a dimension of the recess along an axial direction perpendicular to the metal shell is 0.4 mm-0.7 mm.

[0013] Optionally, the pressing member and the conductive column are located on the same side of the battery cell body, the first end of the conductive column passes through the pressing member and is conductively connected to the first tab, and the conductive column and the pressing member are insulated from each other.

[0014] Optionally, the pressing member is a sealing block, the outer circumferential surface of the sealing block is in sealing contact with the inner circumferential surface of the metal shell, and the tab protrusion is clamped between the sealing block and the metal shell.

[0015] Optionally, the metal shell includes a shell body and a flange formed at one end of the shell body, and the sealing block is clamped between the flange and the battery cell body.

[0016] Optionally, the length of the tab protrusion is 2.3 mm to 3.3 mm.

[0017] Through the above technical solution, the pressing member can press the tab protrusion of the second tab against the inner surface of the metal shell, so that the tab protrusion is conductively connected to the metal shell, so that the metal shell can replace the conductive column connected to the second tab in the related technology and be connected to the electrical appliance, thereby reducing the number of conductive columns, simplifying the structure of the battery, reducing the processing cost and difficulty of the battery, and improving processing efficiency.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0020] FIG1 is a schematic top view of a battery provided in accordance with one embodiment of the present disclosure.

[0021] FIG2 is a schematic cross-sectional view along the AA direction in FIG1 .

[0022] Figure 3 is an enlarged schematic diagram of part A in Figure 2.

[0023] FIG4 is a perspective schematic diagram of a battery provided in accordance with an embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0025] In this disclosure, unless otherwise indicated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the adapter structure when assembled in the battery pack during normal use. "Inner" and "outer" refer to the inner and outer positions relative to the contours of the corresponding component. Furthermore, the terms "first" and "second" are used in this disclosure to distinguish one element from another and do not convey sequential order or importance.

[0026] As a first aspect provided by the present disclosure, as shown in Figures 1 to 4, the present disclosure provides a battery 100, including a metal shell 1, a battery cell 2, a conductive column 3 and a pressing member 4, the battery cell 2 is accommodated in the metal shell 1, the battery cell 2 includes a battery cell body 21, a first pole tab 22 and a second pole tab 23, the first end of the conductive column 3 is conductively connected to the first pole tab 22, the second end of the conductive column 3 is located outside the metal shell 1, the second pole tab 23 has a pole tab protrusion 231 protruding from the battery cell body 21, and the pressing member 4 is accommodated in the metal shell 1 and is used to press the pole tab protrusion 231 against the inner surface of the metal shell 1 so that the pole tab protrusion 231 is in conductive contact with the metal shell 1.

[0027] Through the above technical solution, the pressing member 4 can press the tab protrusion 231 of the second tab 23 against the inner surface of the metal shell 1, so that the tab protrusion 231 is conductively connected to the metal shell 1, so that the metal shell 1 can replace the conductive column connected to the second tab in the related technology to be connected to the electrical appliance, thereby reducing the number of conductive columns, simplifying the structure of the battery 100, reducing the processing cost and difficulty of the battery 100, and improving processing efficiency.

[0028] It should be noted that the above-mentioned first pole tab 22 can be the positive pole tab of the battery cell 2, and the second pole tab 23 can be the negative pole tab of the battery cell 2, so that the conductive column 3 is the positive pole of the battery 100, and the metal shell 1 is the negative pole of the battery 100; the above-mentioned first pole tab 22 can also be the negative pole tab of the battery cell 2, and the second pole tab 23 can be the positive pole tab of the battery cell 2, so that the conductive column 3 is the negative pole of the battery 100, and the metal shell 1 is the positive pole of the battery 100. This disclosure does not limit this.

[0029] In addition, optionally, at least a portion of the first electrode tab 22 may protrude from the cell body 21 to facilitate electrical connection with the conductive column 3 .

[0030] Optionally, the length of the tab protrusion 231 may be 2.3 mm to 3.3 mm. Using the tab protrusion 231 of the above length can ensure that the tab protrusion 231 can be clamped between the pressing member 4 and the metal shell 1 while minimizing the length of the tab protrusion 231. This can save material and cost for the second tab 23 while ensuring that the tab protrusion 231 has sufficient length for clamping between the pressing member 4 and the metal shell 1.

[0031] It should be noted that the length of the above-mentioned tab protrusion 231 refers to the length of the tab protrusion 231 itself, that is, the length of the tab protrusion 231 refers to the straight-line distance from one end of the tab protrusion 231 close to the battery cell body 21 to the other end away from the battery cell body 21 when it is not bent.

[0032] It is understood that the pressing member 4 can have any appropriate shape and structure. In one embodiment provided in the present disclosure, as shown in Figures 2 and 3, the pressing member 4 can be elastic. A recess 11 is formed on the metal shell 1, which is recessed toward the interior of the metal shell 1. At least a portion of the tab protrusion 231 is clamped between the pressing member 4 and the recess 11. Since the tab protrusion 231 needs to maintain contact with the metal shell 1 in order to conduct electricity with the metal shell 1, the pressing member 4 is elastic, so that the tab protrusion 231 can be subjected to the elastic force of the pressing member 4, maintaining a close contact between the tab protrusion 231 and the metal shell 1, and preventing the tab protrusion 231 from separating from the metal shell 1 and causing failure of the battery 100. In addition, an inwardly recessed recess 11 is formed on the metal shell 1, which further reduces the space between the metal shell 1 and the pressing piece 4. Part of the tab protrusion 231 is clamped between the pressing piece 4 and the recess 11, so that the tab protrusion 231 fits more closely with the metal shell 1, further reducing the possibility of falling off and failure.

[0033] During the production process of the battery 100, the pressing member 4 can be first placed into the metal shell 1, and then the recess 11 can be formed on the metal shell 1. As the recess 11 sinks into the interior of the metal shell 1, the recess 11 squeezes the pressing member 4, causing the pressing member 4 to elastically deform and generate an elastic force to press the tab protrusion 231 against the recess 11. Therefore, the above embodiment can also ensure that the tab protrusion 231 is clamped between the pressing member 4 and the metal shell 1 while reducing the manufacturing precision requirements of the pressing member 4 and the metal shell 1.

[0034] Optionally, the pressing member 4 may be an elastic ring structure, a block structure, a plate structure, etc., which is not limited in the present disclosure.

[0035] Optionally, as shown in Figures 2 and 4, the recess 11 can be formed as an annular recess extending along the circumference of the metal shell 1. On the one hand, since the recess 11 extends along the circumference of the metal shell 1 and is formed in a ring shape, no matter where the pole tab protrusion 231 is located in the metal shell 1, the annular recess can be close to the pole tab protrusion 231, so that the pressing member 4 can press the pole tab protrusion 231 against the annular recess. On the other hand, since the battery cell 2 is accommodated in the metal shell 1, the annular recess can form a stop portion on the inner surface of the metal shell 1, thereby limiting the range of movement of the battery cell body 21 and preventing the battery cell body 21 from moving in the metal shell 1.

[0036] Optionally, the annular recess can be formed by rolling with a roller groove jig.

[0037] Optionally, as shown in FIG2 , the dimension L1 of the recess 11 along the axial direction of the metal shell 1 can be equal to or smaller than the dimension L2 of the pressing member 4 along the axial direction of the metal shell 1. Since the tab protrusion 231 is clamped between the pressing member 4 and the recess 11, setting the axial dimension L1 of the recess 11 along the metal shell 1 to be equal to or smaller than the axial dimension L2 of the pressing member 4 along the metal shell 1 allows the tab protrusion 231 to always remain between the pressing member 4 and the recess 11. Even if the length of the tab protrusion 231 is greater than the axial dimension L1 of the recess 11 along the metal shell 1, it can still be clamped between the pressing member 4 and the metal shell 1, thereby ensuring that the tab protrusion 231 is always in contact with the metal shell 1, thereby improving the reliability of the battery 100.

[0038] It should be noted that the axial dimension L1 of the recess 11 along the metal shell 1 may refer to the maximum dimension of the recess 11 along the axial direction of the metal shell 1. For example, in embodiments where the cross-section of the recess 11 is formed into an arc or V-shape, the axial dimension L1 of the recess 11 along the metal shell 1 refers to the straight-line distance between the two ends of the arc or V-shaped opening along the axial direction of the metal shell 1. The axial dimension L2 of the pressing member 4 along the metal shell 1 refers to the straight-line distance between the two ends of the pressing member 4 along the axial direction of the metal shell 1, that is, the thickness of the pressing member 4 along the axial direction of the metal shell 1.

[0039] Optionally, the dimension L1 of the recess 11 along the axial direction of the metal shell 1 can be 1.6 mm to 2 mm, and the dimension of the pressing member 4 along the axial direction of the metal shell 1 can be 3.9 mm to 4.1 mm. This can not only encourage the pressing member 4 to generate an elastic force that pushes the tab protrusion 231 toward the metal shell 1 so that the tab protrusion 231 abuts against the metal shell 1, but also avoid excessively affecting the structural strength of the metal shell 1.

[0040] Optionally, as shown in FIG3 , the dimension L3 of the recess 11 along the axial direction perpendicular to the metal shell 1 is 0.4 mm to 0.7 mm. Since the recess 11 is recessed into the metal shell 1 to clamp the tab protrusion 231 between the recess 11 and the pressing member 4, the dimension L3 of the recess 11 along the axial direction perpendicular to the metal shell 1 is the depth of the recess 11 recessed into the metal shell 1. When the depth is 0.4 mm to 0.7 mm, it can ensure that the recess 11 and the pressing member 11 clamp the tab protrusion 231, while also preventing the pressing member 4 from being deformed excessively and failing due to excessive depth, thereby further improving the reliability of the battery 100. For the embodiment in which the pressing member 4 is a sealing block mentioned below, the dimension of the recess 11 along the axial direction perpendicular to the metal shell 1 is 0.4 mm to 0.7 mm. On the one hand, it can ensure the sealing effect of the sealing block on the battery cell 2, and on the other hand, it can also prevent the sealing block from bulging due to the extrusion of the recess 11.

[0041] It should be noted that the dimension L3 of the recess 11 along the axial direction perpendicular to the metal shell 1 of the housing may refer to the maximum dimension of the recess 11 along the axial direction perpendicular to the metal shell 1 of the housing. For example, in an embodiment where the cross-section of the recess 11 is arc-shaped, the dimension L3 of the recess 11 along the axial direction perpendicular to the metal shell 1 refers to the maximum straight-line distance from the opening of the arc to its recessed part. In an embodiment where the cross-section of the recess 11 is V-shaped, the dimension L3 of the recess 11 along the axial direction perpendicular to the metal shell 1 refers to the straight-line distance between the opening of the V-shape and the tip of the V-shape. It is understood that in an embodiment where the recess 11 is U-shaped, the dimension L3 of the recess 11 along the axial direction perpendicular to the metal shell 1 refers to the straight-line distance between the opening of the U-shape and the bottom opposite to the opening of the U-shape.

[0042] The pressing member 4 and the conductive column 3 can be located on the same side of the battery cell body 21, or on different sides of the battery cell body 21 (for example, the conductive column 3 is located at the top of the battery cell body 21, and the pressing member 4 is located at the bottom of the battery cell body 21). This disclosure does not limit this.

[0043] As shown in Figure 2, in one embodiment provided by the present disclosure, the pressing member 4 and the conductive column 3 are located on the same side of the battery cell body 21. The first end of the conductive column 3 is inserted through the pressing member 4 and is electrically connected to the first tab 22. The conductive column 3 and the pressing member 4 are insulated from each other. Since the tab protrusion 231 is pressed against the inner surface of the metal shell 1 by the pressing member 4 and is in conductive contact with the metal shell 1, the metal shell 1 and the conductive column 3 respectively constitute the two electrodes of the battery 100. In order to prevent the battery 100 from short-circuiting due to contact between the two electrodes, the conductive column 3 and the pressing member 4 are insulated from each other. This ensures that conductive contact does not occur between the conductive column 3 and the metal shell 1, further ensuring the safety of the battery 100.

[0044] Optionally, the present disclosure does not limit the insulation method between the conductive column 3 and the pressure piece 4. For example, an insulating coating can be coated on the surface of the pressure piece 4, or the pressure piece 4 can be made of insulating material (such as rubber, plastic, etc.), or an insulating piece can be added between the conductive column 3 and the pressure piece 4. The present disclosure does not limit this.

[0045] Alternatively, as shown in FIG2 , the pressing member 4 may be a sealing block, the outer circumference of the sealing block being in sealing contact with the inner circumference of the metal shell 1, and the tab protrusion 231 being clamped between the sealing block and the metal shell 1. Since the sealing block is generally elastic and insulating, the pressing member 4 is configured as a sealing block and in sealing contact with the inner circumference of the metal shell 1, so that the pressing member 4 can simultaneously have at least the following three effects: First, the battery cell 2 is sealed in the metal shell 1 to prevent the battery 100 from being damaged by a poor seal; Second, the pressing member 4 is deformed under the action of the recess 11 and generates elastic force to press the tab protrusion 231 against the recess 11; Third, for embodiments in which the conductive column 3 passes through the sealing block, mutual conduction between the conductive column 3 and the metal shell 1 can be avoided, thereby preventing the battery 100 from short-circuiting due to the conductive column 3 and the metal shell 1.

[0046] As mentioned above, when the pressing member 4 is a sealing block, the size of the recess 11 along the axial direction perpendicular to the metal shell 1 can be 0.4mm-0.7mm, thereby ensuring the sealing effect of the sealing block on the battery cell 2, avoiding a gap between the sealing block and the inner surface of the metal shell 1, and preventing the sealing block from being warped or bulging due to the excessive inward size of the recess 11, squeezing the sealing block.

[0047] Optionally, a through hole for the conductive column 3 to pass through may be formed on the sealing block; or the sealing block may be formed as an annular sealing block so that the conductive column 3 can pass through the hollow portion in the middle of the annular sealing block.

[0048] Optionally, the sealing block may be a rubber sealing block.

[0049] Optionally, as shown in Figures 1 and 2, the metal shell 1 may include a shell body 12 and a flange 13 formed at one end of the shell body 12, and the sealing block is clamped between the flange 13 and the battery cell body 21. It is understandable that an opening is formed at one end of the metal shell 1, and the battery cell 2 and the sealing block can be installed into the metal shell 1 through the opening. After the battery cell 2 and the sealing block are installed, the opening is bent to form the flange 13, so that the diameter of the opening can be reduced, and the sealing block can be clamped between the flange 13 and the battery cell body 21, so that the sealing block and the battery cell 2 can be fixed along the axial direction of the metal shell 1, and together with the sealing block, the battery cell body 21 is sealed and fixed in the metal shell 1.

[0050] Optionally, the battery 100 may be a capacitor battery or other types of cylindrical batteries, which is not limited in the present disclosure.

[0051] As a second aspect provided by the present disclosure, the present disclosure further provides an electrical device, comprising the above-mentioned battery 100.

[0052] The present disclosure does not limit the type of electrical equipment. For example, it can be a vehicle, mobile phone, portable device, laptop computer, electric toy, power tool, drone, lighting equipment, etc. The vehicle can be a fuel vehicle, a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc.

[0053] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0055] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A battery (100), characterized in that: include Metal housing (1); A battery cell (2) is contained in the metal shell (1), wherein the battery cell (2) comprises a battery cell body (21), a first pole lug (22) and a second pole lug (23); a conductive column (3), wherein a first end of the conductive column (3) is conductively connected to the first pole lug (22), a second end of the conductive column (3) is located outside the metal shell (1), and the second pole lug (23) has a pole lug protrusion (231) protruding from the battery cell body (21); and A pressing member (4) is accommodated in the metal shell (1) and is used to press the pole lug protrusion (231) against the inner surface of the metal shell (1) so that the pole lug protrusion (231) is in conductive contact with the metal shell (1).

2. The battery (100) according to claim 1, characterized in that: The pressing member (4) is elastic, and a recess (11) is formed on the metal shell (1) and is recessed toward the inside of the metal shell (1), and at least part of the tab protrusion (231) is clamped between the pressing member (4) and the recess (11).

3. The battery (100) according to claim 2, characterized in that: The recess (11) is formed as an annular recess extending along the circumference of the metal shell (1).

4. The battery (100) according to claim 3, characterized in that: The dimension of the recess (11) along the axial direction of the metal shell (1) is equal to or smaller than the dimension of the pressing piece (4) along the axial direction of the metal shell (1).

5. The battery (100) according to claim 4, characterized in that: The dimension of the recess (11) along the axial direction of the metal shell (1) is 1.6 mm to 2 mm, and the dimension of the pressing piece (4) along the axial direction of the metal shell (1) is 3.9 mm to 4.1 mm.

6. The battery (100) according to claim 4 or 5, characterized in that: The dimension of the recess (11) along the axial direction perpendicular to the metal shell (1) is 0.4 mm-0.7 mm.

7. The battery (100) according to any one of claims 1 to 6, characterized in that: The pressing member (4) and the conductive column (3) are located on the same side of the battery cell body (21); the first end of the conductive column (3) passes through the pressing member (4) and is conductively connected to the first pole ear (22); the conductive column (3) and the pressing member (4) are insulated from each other.

8. The battery (100) according to any one of claims 1 to 7, characterized in that: The pressing member (4) is a sealing block, the outer circumferential surface of the sealing block is in sealing contact with the inner circumferential surface of the metal shell (1), and the tab protrusion (231) is clamped between the sealing block and the metal shell (1).

9. The battery (100) according to claim 8, characterized in that: The metal shell (1) comprises a shell body (12) and a flange (13) formed at one end of the shell body (12), and the sealing block is clamped between the flange (13) and the battery cell body (21).

10. The battery (100) according to any one of claims 1 to 9, characterized in that: The length of the tab protrusion (231) is 2.3 mm to 3.3 mm.

11. An electrical device, characterized in that: A battery (100) comprising any one of claims 1 to 10.

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