Battery and electric device

Abstract

The application provides a battery and an electric device. The battery comprises: a shell assembly, which comprises: a shell, a containing cavity is arranged in the shell, at least one end of the shell is provided with a shell opening, and a cover plate is arranged on the shell opening and provided with a through hole communicated with the containing cavity; a conductive assembly, which comprises: a pole, the pole is arranged in the through hole; an adapter, the adapter is arranged in the containing cavity, and one end of the pole along a first direction is fixedly connected with the adapter; and a cell assembly, which comprises at least one cell body, the cell body is provided with a conductive piece, and the conductive piece is welded with the adapter; wherein the diameter R of the pole and the width d of the adapter along a second direction satisfy: 0.15<=R / d<=0.55. The ratio of the diameter R of the pole and the width d of the adapter is in a proper range, so that the battery has the following advantages: the conductive assembly has good conductive performance, the connection strength between the adapter and the conductive piece of the conductive assembly is improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery and an electrical device. Background Technology

[0002] With the rapid development of new energy technologies, batteries, as the core component for energy storage and supply, have seen their conductivity, structural stability, and space utilization become key indicators. In the battery structure, the conductive connection between the terminals and the cell assembly is the core path for current transmission, and its design rationality directly affects the battery's charging and discharging efficiency, safety, and lifespan.

[0003] In some battery structures, the terminals are electrically connected to conductive components (tabs) on the cell via adapters. The adapters and tabs are welded together, with the terminals located on the side of the adapter facing away from the tabs. During normal battery use, heat is generated on the terminals, which can affect the welded area between the adapter and the tabs, thus impacting the connection strength and consequently affecting battery performance. Utility Model Content

[0004] This application provides a battery and electrical device to solve the problem that the connection strength at the welding point between the adapter and the conductive component is affected by the setting of the terminal post.

[0005] On one hand, this application provides a battery, including: a casing assembly, including: a housing, wherein a receiving cavity is provided inside the housing, and at least one end of the housing is provided with a shell opening; a cover plate, covering the shell opening, wherein a through hole communicating with the receiving cavity is provided on the shell opening; a conductive assembly, including: an electrode post, passing through the through hole; an adapter, disposed in the receiving cavity, wherein one end of the electrode post along a first direction is fixedly connected to the adapter; a cell assembly, including at least one cell body, wherein the cell body is provided with a conductive element, and the conductive element is welded to the adapter; wherein, the diameter R of the electrode post and the width d of the adapter along a second direction satisfy: 0.15≤R / d≤0.55.

[0006] The battery provided by the above technical solution, by ensuring that the ratio of the terminal diameter R to the adapter width d is within a suitable range, avoids two problems. Firstly, R / d should not be too small, as this would result in either an excessively thin terminal diameter or an excessively wide adapter, leading to poor current-carrying performance between the terminal and the external busbar. This could cause localized overheating at the connection point between the terminal and the adapter due to excessive current density, potentially causing the weld between the conductive component and the adapter to melt and affecting battery performance. Secondly, R / d should not be too large, as this would result in an excessively small adapter width, reducing the weld area between the conductive component and the adapter and weakening the connection strength, thus affecting battery performance. Alternatively, an excessively large terminal diameter would occupy too much space within the cavity, affecting the battery's energy density. In this way, while ensuring good conductivity of the conductive components, the connection strength between the adapter and the conductive components is improved, which is beneficial for extending the battery's lifespan. Attached Figure Description

[0007] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0008] Figure 1 This is a schematic diagram of the battery structure according to an embodiment of the present invention;

[0009] Figure 2 This is a schematic diagram of the internal structure of the battery according to an embodiment of the present invention;

[0010] Figure 3 This is a schematic diagram of the connection between the conductive component and the battery cell assembly in an embodiment of the present invention;

[0011] Figure 4 This is a schematic diagram showing the connection between the conductive component and the adapter in an embodiment of the present invention.

[0012] Explanation of reference numerals in the attached figures:

[0013] 100-Battery; 110-Casing assembly; 111-Casing; 112-Receiving cavity; 113-Casing opening; 114-Cover plate; 120-Conductive component; 121-Terminal post; 122-Adapter; 130-Cell assembly; 131-Cell body; 132-Conductive component; 1321-Connecting section;

[0014] 140 - Mounting bracket.

[0015] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0016] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0017] With the rapid development of new energy technologies, batteries, as the core component for energy storage and supply, have seen their conductivity, structural stability, and space utilization become key indicators. In the battery structure, the conductive connection between the terminals and the cell assembly is the core path for current transmission, and its design rationality directly affects the battery's charging and discharging efficiency, safety, and lifespan.

[0018] In some battery structures, the terminals are electrically connected to conductive components (tabs) on the cell via adapters. The adapters and tabs are welded together, with the terminals located on the side of the adapter facing away from the tabs. During normal battery use, heat is generated on the terminals, which can affect the welded area between the adapter and the tabs, thus impacting the connection strength and consequently affecting battery performance.

[0019] In view of this, this application provides a battery and an electrical device that, by keeping the ratio of the electrode diameter R to the adapter width d within a suitable range, ensures good conductivity of the conductive component while improving the connection strength between the adapter and the conductive component, thereby extending the battery's service life.

[0020] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0021] For ease of narration and understanding, please refer to Figure 1 Define the height direction of the battery as the first direction (Z direction), the width direction as the second direction (X direction), and the length direction as the third direction (Y direction).

[0022] refer to Figures 1 to 4 In a first aspect, embodiments of the present invention provide a battery 100, which may include: a housing assembly 110, a conductive assembly 120, and a cell assembly 130.

[0023] The outer casing assembly 110 may include a housing 111 and a cover plate 114. At least one end of the housing 111 has a casing opening 113 communicating with the receiving cavity 112. The cover plate 114 seals the casing opening 113. Exemplarily, the casing opening 113 may be located on one end wall of the housing 111, or it may be located at both opposite ends of the housing 111 along the height (width / length) direction of the battery 100. The location of the casing opening 113 is related to the arrangement of the battery cell assembly 130 of the battery 100, with the conductive element 132 on the battery cell assembly 130 facing the casing opening 113. The casing opening 113 may be located on one side of the housing 111 along the Z direction, or on one side of the housing 111 along the Y direction, or on one side of the housing 111 along the X direction.

[0024] Understandably, the battery 100 of this application can be a prismatic battery 100, and correspondingly, the cross-section of the casing 111 is square, and the casing opening 113 is also square; or, the battery 100 can be a cylindrical battery 100, and correspondingly, the cross-section of the casing 111 is circular, and the casing opening 113 is also circular.

[0025] Optionally, the material of the housing 111 may include at least one of aluminum, aluminum alloy, steel, copper, nickel, magnesium, and titanium, or the housing 111 may also include other alloy materials.

[0026] The cover plate 114 may have a through hole that communicates with the receiving cavity 112.

[0027] The conductive component 120 may include a terminal post 121 and an adapter 122. The terminal post 121 is fixedly disposed in the mounting hole and is electrically connected to the conductive element 132 of the cell assembly 130 through the adapter 122, forming a stable current-conducting channel, so that the cell assembly 130 can be connected to an external circuit and conduct current. Exemplarily, the terminal post 121 can be fixedly mounted in the mounting hole with sealant, or the terminal post 121 can also be fixedly mounted in the mounting hole with other structural components (such as the mounting bracket 140 described later) to facilitate assembly.

[0028] Optionally, the material of the pole 121 may include at least one of copper, aluminum, or nickel.

[0029] The adapter 122 is disposed within the receiving cavity 112, and one end of the electrode post 121 along the first direction (Z direction) is fixedly connected to the adapter 122. Exemplarily, the electrode post 121 and the adapter 122 can be integrally formed, or they can be separate structures, fixedly connected by welding. The adapter 122 is used to connect the electrode post 121 and the conductive element 132 of the cell assembly 130, serving to disperse and conduct current.

[0030] The battery cell assembly 130 may include at least one battery cell body 131, and the battery cell body 131 is provided with a conductive element 132. Exemplarily, the battery cell assembly 130 may include one battery cell body 131, or the battery cell assembly 130 may also include two battery cell bodies 131 arranged side by side along the second direction (X direction), or the battery cell assembly 130 may also include more battery cell bodies 131. The embodiments of this application do not limit this.

[0031] The battery cell body 131 is formed by winding or stacking a positive electrode plate, a negative electrode plate and a separator disposed between the two.

[0032] The positive electrode sheet may include a positive electrode current collector and a positive electrode active material. The positive electrode current collector may be made of metal materials such as aluminum foil, nickel foil, or stainless steel, or it may be a composite foil formed by combining metals and insulating materials. The positive electrode active material includes the main positive electrode material, conductive agent, and binder. Among them, the main positive electrode material includes one or more lithium-containing positive electrode active materials such as lithium iron phosphate, ternary materials containing nickel, cobalt, and manganese, and lithium manganese iron phosphate.

[0033] Similarly, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material. The negative electrode current collector may be made of metal materials such as copper foil, aluminum foil, or stainless steel, or it may be a composite foil formed by combining metals and insulating materials. The negative electrode active material may include a negative electrode active material, a conductive agent, and a binder. Among them, the negative electrode active material includes one or more of the following: artificial graphite, natural graphite, silicon carbide, silicon oxide, and lithium titanate.

[0034] In addition, electrolyte can also be placed inside the receiving cavity 112. During normal use of the battery 100, the electrolyte needs to continuously wet the cell body 131 to replenish the electrolyte. The capacity of the electrolyte is related to the performance of the battery 100. If the battery 100 lacks electrolyte, it will affect the electrolyte replenishment process, and thus affect the charge and discharge performance of the battery 100. Therefore, the more space in the receiving cavity 112 used to hold the electrolyte, the better it is for improving the performance of the battery 100.

[0035] There can be at least two conductive elements 132, which are respectively connected to the positive electrode and the negative electrode of the cell body 131 to form positive conductive element 132 and negative conductive element 132. Correspondingly, the number of terminals 121 and adapters 122 can be multiple corresponding to the number of conductive elements 132. The conductive elements 132 and adapters 122 are welded together to realize the function of connecting the cell assembly 130 with the external circuit and conducting current.

[0036] Optionally, in some embodiments, the conductive element 132 may be located on the end face of the cell body 131 facing the through hole, in which case the adapter 122 may be a plate-like structure. In other designs, in order to improve the utilization of the internal space of the battery 100 casing 111, the conductive element 132 may also be located on the end face of the cell body 131 perpendicular to the axis of the through hole. In this case, the adapter 122 may also be formed as an L-shaped plate-like structure, with one end arm of the adapter 122 welded to the conductive element 132 and the other end arm connected to the terminal post 121.

[0037] refer to Figure 2 The diameter R of the pole post 121 and the width d of the adapter 122 along the second direction (X direction) satisfy the following condition: 0.15 ≤ R / d ≤ 0.55. For example, the ratio R / d of the diameter R of the pole post 121 and the width d of the adapter 122 along the second direction can be 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5 or 0.55. Of course, the ratio R / d of the diameter R of the pole post 121 and the width d of the adapter 122 along the second direction can also be other values. Designers can choose according to their needs, and this application does not limit this.

[0038] On the one hand, it is necessary to avoid R / d being too small. In this case, the diameter of the terminal 121 is too thin or the width of the adapter 122 is too wide. The current-carrying performance between the terminal 121 and the externally connected busbar is poor, and the connection between the terminal 121 and the adapter 122 is prone to local overheating due to excessive current density. This can lead to the melting of the weld between the conductive component 132 and the adapter 122, affecting the performance of the battery 100. On the other hand, it is necessary to avoid R / d being too large. In this case, the width of the adapter 122 is too small, and the area of ​​the welded area between the conductive component 132 and the adapter 122 is reduced accordingly. This reduces the connection strength between the conductive component 132 and the adapter 122, affecting the performance of the battery 100. Alternatively, the diameter of the terminal 121 may be too large, occupying too much space in the receiving cavity 112, affecting the energy density of the battery 100.

[0039] The battery 100 of this invention, by keeping the ratio of the diameter R of the terminal post 121 to the width d of the adapter 122 within a suitable range, ensures that the conductive component 120 has good conductivity while improving the connection strength between the adapter 122 and the conductive component 132 of the conductive component 120, which is beneficial to extending the service life of the battery 100.

[0040] refer to Figure 2 and Figure 3 In some embodiments, the diameter of the pole post 121 is R, in mm, and R satisfies: 5≤R≤20. For example, the diameter of the pole post 121 can be 5mm, 10mm, 15mm or 20mm. Of course, the diameter R of the pole post 121 can also be other values, which are not limited in this application.

[0041] The appropriate diameter of the terminal 121 serves two purposes: firstly, it prevents the terminal 121 from being too small, resulting in insufficient current carrying capacity and overheating of the battery 100 during use; secondly, it prevents the terminal 121 from being too large, occupying too much space within the housing cavity 112 and affecting the energy density of the battery 100.

[0042] The width of the adapter 122 along the second direction is d, in mm, and d satisfies: 10≤d≤35. For example, the width of the adapter 122 along the second direction can be 10mm, 15mm, 20mm, 25mm, 30mm or 35mm. Of course, the width d of the adapter 122 along the second direction can also be other values, and this application does not limit it.

[0043] By giving the adapter 122 a suitable width, on the one hand, it avoids the adapter 122 being too narrow, which would result in poor connection stability with the terminal 121 and the conductive element 132, affecting the structural reliability of the battery 100. On the other hand, it avoids the adapter 122 being too wide, which would affect the overall structure of the battery 100 and lead to a reduction in the battery 100's capacity.

[0044] It should be noted that when designing and selecting the specific values ​​of the diameter R of the pole post 121 and the width d of the adapter 122 along the second direction, it is necessary to ensure that the diameter R of the pole post 121 and the width d of the adapter 122 along the second direction satisfy 0.15≤R / d≤0.55.

[0045] refer to Figure 3 In some embodiments, the width d of the adapter 122 along the second direction (X direction) and the width D of the cell assembly 130 along the second direction satisfy the following: 0.14 ≤ d / D ≤ 0.45. For example, the ratio d / D of the width d of the adapter 122 along the second direction to the width D of the cell assembly 130 along the second direction can be 0.14, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, or 0.45. Of course, d / D can also be other values, and designers can choose according to their needs; this application does not impose any restrictions on this.

[0046] On the one hand, to avoid the ratio d / D of the width d of the adapter 122 along the second direction to the width D of the cell assembly 130 along the second direction being too small, the width dimension d of the adapter 122 being too small relative to the overall width D of the cell assembly 130, the welding area between the conductive part 132 on the cell body 131 of the cell assembly 130 and the adapter 122 is small, resulting in low connection strength between the adapter 122 and the conductive part 132, which affects the performance of the battery 100. On the other hand, to avoid the ratio d / D of the width d of the adapter 122 along the second direction to the width D of the cell assembly 130 along the second direction being too large, which would cause the adapter 122 to occupy too much space in the receiving cavity 112, when the conductive component 132 is welded to the adapter 122, part of the structure of the conductive component 132 protrudes from the cell body 131 along the second direction, causing interference between the cell assembly 130 and other components of the battery 100 (such as the housing 111), resulting in a short circuit between the cell assembly 130 and the housing 111 or wear of the conductive component 132.

[0047] This allows d / D to have a suitable range, which helps to ensure the connection strength between the adapter 122 and the conductive element 132, while ensuring the matching between the adapter 122 and the cell assembly 130, thereby improving the structural reliability of the battery 100.

[0048] Understandably, in this embodiment, when the battery cell assembly 130 has only one battery cell body 131, the width D of the battery cell assembly 130 along the second direction is the width dimension of the battery cell body 131 along the second direction. When the battery cell assembly 130 has multiple battery cell bodies 131, the width D of the battery cell assembly 130 along the second direction is the total width dimension of the multiple battery cell bodies 131 after being stacked along the second direction.

[0049] Optionally, in some embodiments, the width of the battery cell assembly 130 along the second direction is D, in mm, and D can satisfy: 25 ≤ D ≤ 75. For example, the width of the battery cell assembly 130 along the second direction can be 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, or 75 mm. Of course, the width of the battery cell assembly 130 along the second direction can also be other values, and this application does not limit this. According to specific needs, designers can flexibly set the width D of the battery cell assembly 130 along the second direction, and the number of battery cell bodies 131 included in the battery cell assembly 130 can also be set according to actual needs.

[0050] The cell body 131 of the battery 100 of this application can be a wound core structure or a stacked core structure.

[0051] For the wound-type cell body 131, the positive and negative electrode sheets are formed by winding them together, with a separator separating the positive and negative electrode sheets. Both the positive and negative electrode sheets can be integral structures. Taking the positive electrode sheet as an example, multiple tabs can be provided at the current collector end of the positive electrode sheet. During the winding process to form the cell body 131, the outer tabs and the inner tabs are attached to each other to form an integral conductive element 132. Since the perimeter of each layer of the cell body 131 is different during winding, the spacing between two adjacent tabs along the length direction of the positive electrode sheet will also be adjusted accordingly.

[0052] For the stacked core structure of the cell body 131, multiple positive electrode plates, separators and negative electrode plates are stacked sequentially along their thickness direction to form the cell body 131. Each positive electrode plate and negative electrode plate is provided with only one tab. When the positive electrode plate, separator and negative electrode plate are stacked sequentially, the tab of the positive electrode is stacked to form the positive electrode conductive element 132, and the tab of the negative electrode is stacked to form the negative electrode conductive element 132.

[0053] refer to Figure 2 , Figure 3 and Figure 4 In some embodiments, the conductive element 132 may have a connecting segment 1321 extending in a second direction. That is, after the conductive element 132 is led out from the cell body 131, the end away from the cell body 131 can be bent in the second direction to form the connecting segment 1321. The end face of the adapter 122 facing away from the pole post 121 in the first direction is welded to the connecting segment 1321. In this way, the adapter 122 and the connector are welded together, which is beneficial to make low-resistance contact between the conductive element 132 and the adapter 122. At the same time, the extension of the connecting segment 1321 in the second direction is beneficial to increase the contact area between the adapter 122 and the conductive element 132, thereby improving the connection strength between the conductive element 132 and the adapter 122.

[0054] In some embodiments, the conductive element 132 may include a root connected to the cell body 131 and a conductive end away from the cell body 131. The conductive end has a mounting groove facing the second direction, and a portion of the structure of the adapter 122 is located within the mounting groove. That is, the conductive end of the conductive element 132 forms a mounting groove with an opening facing the second direction. The mounting groove can be a U-shaped groove, a C-shaped groove, or a groove of other structures. A portion of the structure of the adapter 122 is located within the mounting groove. In this case, the portion of the adapter 122 located within the mounting groove can be welded to the two side walls of the mounting groove along the first direction. This results in a large mating area between the adapter 122 and the mounting groove, which is beneficial to improving the connection strength between the conductive element 132 and the adapter 122. At the same time, it makes the connection position between the conductive element 132 and the adapter 122 as close as possible to the edge of the adapter 122, reducing the impact of the heat generated by the electrode post 121 on the connection position between the conductive element 132 and the adapter 122, and improving the structural reliability of the conductive assembly 120.

[0055] refer to Figure 4 According to some embodiments of this utility model, the thickness of the portion connecting the conductive element 132 and the adapter 122 is T, in mm, and T satisfies: 0.16≤T≤1.1. For example, the thickness of the portion connecting the conductive element 132 and the adapter 122 can be 0.16mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, or 0.45mm. Of course, the thickness T of the portion connecting the conductive element 132 and the adapter 122 can also be other values, and designers can choose according to their needs. This application does not limit this.

[0056] On the one hand, it avoids the connection portion between the conductive component 132 and the adapter 122 being too thin, which would result in low connection strength between the conductive component 132 and the adapter 122, making the connection prone to breakage when the battery 100 is subjected to vibration or impact during use. On the other hand, it avoids the connection portion between the conductive component 132 and the adapter 122 being too thick, which would result in high internal stress after bending of the conductive component 132, increasing the difficulty of welding with the adapter 122 and making processing inconvenient.

[0057] Understandably, in this embodiment, when the conductive member 132 is bent in the second direction to form a connecting segment 1321 and welded to the adapter 122, the thickness of the connecting portion of the conductive member 132 and the adapter 122 can be the thickness of the connecting segment 1321 along the first direction. Alternatively, when the conductive end of the conductive member 132 is provided with a mounting groove for accommodating the adapter 122 and is welded to the adapter 122, the thickness of the connecting portion of the conductive member 132 and the adapter 122 can be the sum of the thicknesses of the two side arms of the mounting groove along the first direction. Of course, the thicknesses of the two side arms of the mounting groove along the first direction are the same to ensure the uniformity of force between the conductive member 132 and the adapter 122.

[0058] refer to Figure 3 In some embodiments, the terminal post 121 is located in the middle of the adapter 122 along the third direction (Y direction); the terminal post 121 is also located in the middle of the adapter 122 along the second direction. Thus, within the horizontal plane defined by the second and third directions, the axis of the terminal post 121 coincides with the geometric center line of the adapter 122. On the one hand, this shortens the current flow path from the adapter 122 to the terminal post 121, which is beneficial for improving the conductivity of the conductive component 120. On the other hand, it ensures a uniform current distribution across the conductive component 120, improving the uniformity of current distribution and preventing localized current concentration that could lead to overheating of the battery 100.

[0059] refer to Figure 3 and Figure 4 In some embodiments, in the second direction, the centerline of the electrode 121 is offset from the centerline of the conductor 132. For example, the electrode 121 may be located at the middle of the adapter 122 along the second direction, and the conductor 132 may be welded to the edge of the adapter 122. This arrangement ensures that the position of the electrode 121 on the adapter 122 is spaced apart from the welding area between the adapter 122 and the conductor 132, improving the ease of assembly between the conductor 132 and the adapter 122. Simultaneously, it reduces the impact of overheating on the connection position between the conductor 132 and the adapter 122, thereby improving the reliability of the connection between the conductive assembly 120 and the conductor 132.

[0060] refer to Figure 2 In some embodiments, the battery 100 may also include a mounting bracket 140, which is fixedly mounted in the mounting hole. Exemplarily, the mounting bracket 140 may be a metal or non-metal part, and the mounting bracket 140 may be fixedly mounted in the mounting hole by means of screws or other connectors or adhesives.

[0061] The terminal 121 is fixedly mounted to the mounting bracket 140. For example, the terminal 121 can be fixedly mounted to the mounting bracket 140 by an interference fit, or the terminal 121 can also be fixedly mounted to the mounting bracket 140 by an adhesive. In this way, the mounting bracket 140 is fixedly mounted to the mounting hole, which can provide stable support for the terminal 121, ensuring that the terminal 121 will not shift or shake during the use of the battery 100, and ensuring the stability of the welding between the conductive component 132 and the terminal 121.

[0062] Furthermore, the terminal post 121 is insulated from the mounting bracket 140. For example, the insulation between the terminal post 121 and the mounting bracket 140 can be achieved by coating the contact surfaces of the terminal post 121 and the mounting bracket 140 with insulating adhesive. Alternatively, the mounting bracket 140 can be an insulating element to insulate the terminal post 121 from the housing assembly 110.

[0063] In other embodiments, the mounting bracket 140 may be insulated from the through hole; for example, the contact surface between the mounting bracket 140 and the housing assembly 110 is provided with insulating adhesive. Alternatively, the surface of the mounting bracket 140 facing the housing assembly 110 may be provided with an insulating element to insulate the pole post 121 from the housing assembly 110.

[0064] In this way, by making the terminal 121 relatively insulated from the housing assembly 110, short circuits between the terminal 121 and the housing assembly 110 are avoided, which helps to improve the safety of the battery 100.

[0065] In some embodiments, the terminal post 121 and the adapter 122 are integrally formed, which reduces the connection points between the terminal post 121 and the adapter 122, which helps to improve the structural strength of the terminal post 121. At the same time, it reduces the contact resistance between the terminal post 121 and the adapter 122, thereby improving the charging and discharging efficiency of the battery 100.

[0066] In some embodiments, the terminal 121 and the adapter 122 can be a separate structure. The separate terminal 121 and adapter 122 can be connected by laser welding, ultrasonic welding, or mechanical fastening through interference fit. On one hand, the separate structure of the terminal 121 and adapter 122 facilitates assembly with housings 111 of different sizes, improving production efficiency. On the other hand, for the positive electrode of the battery 100, the terminal 121 can be made of aluminum (offering advantages of low cost and lightweight), and for the negative electrode of the battery 100, the terminal 121 can be made of copper (offering high conductivity). The terminal 121 can be selected based on specific materials, achieving a balance between the conductivity of the battery 100 and its production cost.

[0067] Secondly, embodiments of this application also provide an electrical device, which may include the battery 100 described above.

[0068] For example, the electrical equipment may be equipped with an energy storage compartment, and the battery 100 may be installed in the energy storage compartment and connected to the internal circuit of the electrical equipment.

[0069] Optionally, the battery 100 of this utility model can supply power to the electrical equipment alone, or multiple batteries 100 can be connected in series or in parallel to form an energy storage device, which supplies power to the electrical equipment.

[0070] The electrical equipment of this application, by using the aforementioned battery 100, improves the connection stability between the adapter 122 and the conductive component 132, while ensuring the overcurrent performance of the conductive component 120. This provides a stable and efficient energy supply to the electrical equipment, extends the battery life of the electrical equipment, reduces the risk of damage to the electrical equipment due to battery 100 failure, and improves the overall performance of the electrical equipment.

[0071] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0072] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0073] Generally speaking, terms should be understood at least in part by their use in context. For example, the term “one or more” as used in the text can be used, at least in part, to describe any feature, structure, or characteristic of the meaning of the singular, or a combination of features, structures, or characteristics of the meaning of the plural, depending on the context.

[0074] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery (100), characterized in that, include: Housing assembly (110), including: The housing (111) has a receiving cavity (112) inside, and at least one end of the housing (111) has a shell opening (113). A cover plate (114) is provided to seal the shell opening (113), and the shell opening (113) is provided with a through hole communicating with the receiving cavity (112); Conductive component (120), including: The pole post (121) is inserted through the through hole; The adapter (122) is disposed in the receiving cavity (112), and one end of the pole (121) along the first direction is fixedly connected to the adapter (122); The battery cell assembly (130) includes at least one battery cell body (131), the battery cell body (131) being provided with a conductive element (132), the conductive element (132) being welded to the adapter (122); The diameter R of the pole post (121) and the width d of the adapter (122) along the second direction satisfy the following condition: 0.15 ≤ R / d ≤ 0.

55.

2. The battery (100) according to claim 1, characterized in that, The diameter of the pole post (121) is R, in mm, and R satisfies: 5 ≤ R ≤ 20; and / or, The width of the adapter (122) along the second direction is d, in mm, and d satisfies: 10≤d≤35.

3. The battery (100) according to claim 1, characterized in that, The width d of the adapter (122) along the second direction and the width D of the cell assembly (130) along the second direction satisfy the following condition: 0.14≤d / D≤0.

45.

4. The battery (100) according to claim 1, characterized in that, The conductive element (132) has a connecting section (1321) extending in a second direction, and the end face of the adapter (122) facing away from the pole post (121) in the first direction is welded to the connecting section (1321).

5. The battery (100) according to claim 1, characterized in that, The conductive element (132) includes a root connected to the cell body (131) and a conductive end away from the cell body (131), the conductive end having a mounting groove facing the second direction, and a portion of the structure of the adapter (122) is located within the mounting groove.

6. The battery (100) according to claim 4 or 5, characterized in that, The thickness of the portion of the conductive element (132) connected to the adapter (122) is T, in mm, and T satisfies: 0.16≤T≤1.

1.

7. The battery (100) according to claim 1, characterized in that, Along a third direction, the pole post (121) is located in the middle of the adapter (122); and / or, Along the second direction, the pole (121) is located in the middle of the adapter (122).

8. The battery (100) according to claim 1, characterized in that, In the second direction, the centerline of the pole (121) is offset from the centerline of the conductive element (132).

9. The battery (100) according to claim 1, characterized in that, Also includes: Mounting bracket (140), which is fixedly installed in the through hole, and pole post (121) is fixedly installed in the mounting bracket (140).

10. The battery (100) according to claim 9, characterized in that, The pole post (121) is insulated from the mounting bracket (140), and / or the mounting bracket (140) is insulated from the through hole.

11. The battery (100) according to claim 1, characterized in that, The pole (121) and the adapter (122) are integrally formed.

12. The battery (100) according to claim 1, characterized in that, The pole (121) and the adapter (122) are separate structures.

13. An electrical appliance, characterized in that, include: The battery (100) according to any one of claims 1-12.

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