Battery and electric device

Abstract

This application provides a battery and an electrical device. The battery includes: a casing assembly defining a mounting cavity within the casing assembly, and the casing assembly having a mounting hole communicating with the mounting cavity along a first direction; a terminal post disposed in the mounting hole; and a cell assembly including: a cell body disposed in the mounting cavity; and a conductive element located in the mounting cavity. The conductive element includes a first segment and a second segment spaced apart along the first direction, with the two ends of the first segment connected to the second segment and the cell body, respectively. The second segment is welded to the terminal post. A first bending groove is defined between the first segment and the cell body, and a second bending groove is defined between the second segment and the first segment. The first bending groove and the second bending groove gradually approach the terminal post along the first direction, and the width H of the second bending groove along the first direction satisfies: 1mm ≤ H ≤ 3mm. The battery of this application, by limiting the height dimension of the second bending groove of the conductive element, can improve the energy density of the battery while simultaneously improving the connection stability between the conductive element and the terminal post.

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 core components for energy storage and supply, have attracted much attention regarding their performance and safety. In battery structural design, the conductive connection between the cell assembly and the terminals is a key factor affecting the battery's conductivity and structural stability.

[0003] In traditional batteries, the cell assembly is electrically connected to the terminals via conductive components. However, the connection between the conductive components and the terminals is often torn or damaged, affecting the safety of the battery. Utility Model Content

[0004] This application provides a battery and an electrical device to solve the technical problem that the connection between the conductive component and the terminal post is prone to tearing and damage in the prior art.

[0005] On one hand, this application provides a battery, including: a housing assembly, wherein a mounting cavity is defined within the housing assembly, and the housing assembly is provided with a mounting hole communicating with the mounting cavity along a first direction;

[0006] The pole post is disposed in the mounting hole;

[0007] A battery cell assembly includes: a battery cell body disposed in the mounting cavity; a conductive element located in the mounting cavity; the conductive element includes a first segment and a second segment spaced apart along a first direction; the two ends of the first segment are respectively connected to the second segment and the battery cell body; the second segment is welded to the electrode post; a first bending groove is defined between the first segment and the battery cell body; a second bending groove is defined between the second segment and the first segment; the first bending groove and the second bending groove gradually approach the electrode post along the first direction; the width H of the second bending groove along the first direction satisfies: 1mm≤H≤3mm.

[0008] The battery provided by the above technical solution incorporates conductive components by bending them twice within the mounting cavity of the battery casing assembly. Furthermore, the width of the second bending groove, closer to the terminal post, in the first direction of the two bending grooves formed by the bending of the conductive components is limited, resulting in a reasonable overall structural dimension for the conductive components. When the battery is subjected to vibration or impact, the double-layered folded structure of the conductive components provides a certain buffering effect, preventing tearing. Simultaneously, the outer circumference of the conductive components is a certain distance from the welding area between the conductive components and the terminal post, preventing weld slag from rubbing against the conductive components and improving the connection stability at the welding point between the conductive components and the terminal post. This extends the battery's lifespan. Additionally, the conductive components occupy less space in the mounting cavity, allowing more space for the battery cell body, thereby increasing the battery's energy density. Attached Figure Description

[0009] 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.

[0010] Figure 1 This is a schematic diagram of the battery structure according to an embodiment of the present invention;

[0011] Figure 2 This is a schematic diagram of the internal structure of the battery according to an embodiment of the present invention;

[0012] Figure 3 This is one of the structural schematic diagrams of the conductive component in an embodiment of this utility model;

[0013] Figure 4 This is the second schematic diagram of the conductive component in an embodiment of this utility model.

[0014] Explanation of reference numerals in the attached figures:

[0015] 100. Battery;

[0016] 110. Housing assembly; 111. Mounting cavity; 112. Housing; 113. Cover plate;

[0017] 120. Pole column;

[0018] 130. Battery cell assembly; 131. Battery cell body; 132. Conductive component; 1321. First section; 1322. Second section; 1322a. Welding area; 132a. First bending groove; 132b. Second bending groove; 1323. Bending section; 1324. Closing section;

[0019] 140. Mounting bracket.

[0020] 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

[0021] 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.

[0022] With the rapid development of new energy technologies, batteries, as core components for energy storage and supply, have attracted much attention regarding their performance and safety. In battery structural design, the conductive connection between the cell assembly and the terminals is a key factor affecting the battery's conductivity and structural stability.

[0023] In traditional batteries, the cell assembly is electrically connected to the terminals via conductive components. However, the connection between the conductive components and the terminals is often torn or damaged, affecting the safety of the battery.

[0024] 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.

[0025] For ease of explanation and understanding, please refer to... Figure 1 The height direction of the battery can be the Z direction (first direction), the length direction of the battery can be the X direction (second direction), and the width direction of the battery can be the Y direction (third direction).

[0026] refer to Figures 1 to 4 On the one hand, this application provides a battery 100, which may include: a housing assembly 110, a terminal post 120, and a cell assembly 130.

[0027] The housing assembly 110 may include a housing 112 and a cover plate 113. The housing 112 has a receiving cavity for accommodating the cell assembly 130. At least one end of the housing 112 has a shell opening communicating with the receiving cavity. For example, the shell opening may be formed on one end wall of the housing 112, or the shell opening may be formed at both opposite ends of the housing 112 along the height (width / length) direction of the battery 100. The position of the shell opening is related to the arrangement of the cell assembly 130 of the battery 100, and the conductive element 132 on the cell assembly 130 faces the shell opening. The shell opening may be located on one side of the housing 112 along the Z direction, or on one side of the housing 112 along the Y direction, or of course, on one side along the X direction.

[0028] Understandably, the battery 100 of this application can be a prismatic battery 100, and correspondingly, the cross-section of the casing 112 is square, and the casing opening is also square; or, the battery 100 can be a cylindrical battery 100, and correspondingly, the cross-section of the casing 112 is circular, and the casing opening is also circular.

[0029] Optionally, the material of the housing 112 may include at least one of aluminum, aluminum alloy, steel, copper, nickel, magnesium, and titanium, or the housing 112 may also include other alloy materials.

[0030] The cover plate 113 can be used to seal the opening of the housing 112 along the first direction (Z direction). The cover plate 113 can define a mounting hole that communicates with the receiving cavity.

[0031] The terminal post 120 is fixedly disposed in the mounting hole and is fixedly connected to the conductive element 132 of the cell assembly 130 to form a stable current conduction channel, enabling the cell assembly 130 to connect with the external circuit and conduct current. Exemplarily, the terminal post 120 can be fixedly mounted in the mounting hole with sealant, or the terminal post 120 can also be fixedly mounted in the mounting hole with other structural components (such as the mounting bracket 140 described later) to facilitate assembly.

[0032] The battery cell assembly 130 may include a battery cell body 131 and a conductive element 132. The battery cell body 131 is formed by winding or stacking a positive electrode, a negative electrode and a separator disposed between them.

[0033] 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.

[0034] 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.

[0035] In addition, the cavity can also contain electrolyte. During normal use, the battery 100 requires continuous replenishment of the cell body 131 with electrolyte. The capacity of the electrolyte is related to the performance of the battery 100. A lack of electrolyte in the battery 100 will affect the replenishment process and thus the charge and discharge performance of the battery 100. Therefore, the more space in the cavity used to hold the electrolyte, the better it is for improving the performance of the battery 100.

[0036] 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 poles 120 can be multiple corresponding to the conductive elements 132, so as to realize the function of connecting the cell assembly 130 with the external circuit and conducting current.

[0037] The conductive element 132 is housed in the mounting cavity 111. The conductive element 132 may include a first segment 1321 and a second segment 1322 arranged at intervals along a first direction. The two ends of the first segment 1321 are respectively connected to the second segment 1322 and the cell body 131. The second segment 1322 is welded to the electrode post 120. A first bending groove 132a is defined between the first segment 1321 and the cell body 131. A second bending groove 132b is defined between the second segment 1322 and the first segment 1321. The first bending groove 132a and the second bending groove 132b gradually approach the electrode post 120 along the first direction. In other words, the packaging process of the conductive component 132 in this application can be as follows: the conductive component 132 and the cell body 131 are installed together in the receiving cavity, the conductive component 132 extends outward along the first direction, and the worker applies two bending actions to the conductive component 132, so that the conductive component 132 forms a double-layer folded structure along the first direction (that is, forming the first segment 1321 and the second segment 1322). Therefore, to a certain extent, the space occupied by the cell assembly 130 in the receiving cavity along the first direction is reduced, so that the housing 112 can have more space to accommodate a larger cell body 131, thereby improving the energy density of the battery 100, or, so that the receiving cavity can have enough electrolyte to ensure the charging and discharging performance of the battery 100.

[0038] Meanwhile, the folded structure formed by bending the conductive component 132 can play a certain buffering role when the battery 100 is subjected to external impact or vibration, evenly dispersing the force on the conductive component 132 and improving the connection stability of the welding position between the conductive component 132 and the terminal post 120.

[0039] refer to Figure 3 The width H of the second bending groove 132b along the first direction satisfies: 1mm≤H≤3mm. For example, the width H of the second bending groove 132b along the first direction can be 1mm, 2mm or 3mm. Of course, the width H of the second bending groove 132b along the first direction can also be other values. Designers can choose according to their needs. This application does not limit this.

[0040] On the one hand, to avoid the second bending groove 132b having too small a width, the interval between the first segment 1321 and the second segment 1322 would be too small. This would result in a high tension force on the conductive element 132 at the connection between the first segment 1321 and the second segment 1322, making the weld between the second segment 1322 and the terminal 120 prone to tearing and affecting the connection strength between the conductive element 132 and the terminal 120. Simultaneously, due to the close interval between the first segment 1321 and the second segment 1322, when the battery 100 is subjected to impact vibration, the buffer space provided by the conductive element 132 would be small, resulting in poor buffering performance and affecting the connection stability between the conductive element 132 and the terminal 120.

[0041] Furthermore, during the welding process between the conductive component 132 and the electrode post 120, due to the welding after melting, uneven and protruding weld slag may be formed on the surface of the welding area 1322a of the conductive component 132 away from the electrode post 120. In other words, weld slag will be formed on the surface of the second segment 1322 facing the first segment 1321, giving the second bending groove 132b a certain width. The second segment 1322 and the first segment 1321 have a certain distance, that is, the weld slag in the welding area 1322a is separated from part of the outer peripheral surface of the first segment 1321 of the conductive component 132, avoiding friction between the weld slag and the first segment 1321, which is beneficial to improving the structural reliability of the conductive component 132 and extending the service life of the conductive component 132.

[0042] On the other hand, to avoid the second bending groove 132b having a large width, the gap between the first segment 1321 and the second segment 1322 is far, and the space occupied by the cavity is large, resulting in a small volume of the cell body 131 encapsulated in the housing 112, a reduction in electrolyte, and an impact on the performance of the battery 100.

[0043] The battery 100 provided in this application occupies less space in the mounting cavity 111 by having the conductive element 132 bend twice to house it, thus allowing more space to be used for the cell body 131 and improving the energy density of the battery 100. Furthermore, the width of the second bending groove 132b, which is closer to the terminal post 120, is further limited, resulting in a reasonable overall structural dimension for the conductive element 132. When the battery 100 is subjected to vibration or impact, the double-layered folded structure of the conductive element 132 can provide a certain buffering effect, improving the connection stability between the conductive element 132 and the terminal post 120, thereby extending the service life of the battery 100.

[0044] refer to Figure 2 , Figure 3 and Figure 4 In some embodiments, the conductive element 132 includes a bent section 1323, the two ends of which are connected to a first section 1321 and a second section 1322, respectively. The bent section 1323 can be the connection portion between the first section 1321 and the second section 1322 of the conductive element 132. By bending on the bent section 1323, a second bending groove 132b is formed between the first section 1321 and the second section 1322. Understandably, at this time, the bending point on the bent section 1323 is located at the end of the bent section 1323 along the second direction.

[0045] The pole post 120 is welded to the second segment 1322 to form a welding area 1322a. The distance C between the end of the bent segment 1323 away from the second segment 1322 (bending point) and the welding area 1322a in the second direction satisfies: 1mm≤C≤6mm. For example, the distance C between the bending point and the welding area 1322a can be 1mm, 2mm, 3mm, 4mm, 5mm or 6mm. Of course, the distance C between the bending point and the welding area 1322a can also be other values. Designers can choose according to their needs. This application does not limit this.

[0046] On the one hand, to avoid the gap between the bending point and the welding area 1322a being too small, the gap between the welding position of the pole post 120 and the conductive part 132 and the bending point on the conductive part 132 is too small. If the tension force on the second section 1322 is too large, the conductive part 132 is prone to tearing, which will affect the conductivity of the battery 100.

[0047] On the other hand, it is necessary to avoid an excessively large gap between the bending point and the welding area 1322a. That is, the gap between the bending position between the first segment 1321 and the second segment 1322 and the welding area 1322a on the second segment 1322 should be large. In this case, the support effect of the first segment 1321 and the bent segment 1323 on the second segment 1322 is poor, and the buffering effect of the stacked structure formed by the conductive component 132 is small, which leads to a decrease in the connection stability between the second segment 1322 and the pole post 120.

[0048] Understandably, in this application, the welding between the electrode post 120 and the conductive element 132 can be achieved by forming a weld pool within a certain area, with the portions of the electrode post 120 and the conductive element 132 corresponding to the weld pool welded together. The area corresponding to the weld pool constitutes the welding area 1322a. The distance C between the aforementioned bending point and the welding area 1322a can refer to the distance between the bending point and the end of the welding area 1322a closest to the bending point. Alternatively, the electrode post 120 and the conductive element 132 can be fixed by welding at multiple points within a certain area, with the area where the welding points are distributed constituting the welding area 1322a. The distance C between the aforementioned bending point and the welding area 1322a can refer to the distance between the bending point and the nearest welding point.

[0049] In some embodiments, the cell body 131 may include a current collector, on which an active material layer is disposed. The current collector may include a positive current collector and a negative current collector, with a positive active material layer disposed on the positive current collector and a negative active material layer disposed on the negative current collector.

[0050] A conductive element 132 is disposed at one end of the current collector and is electrically connected to the active material layer. For example, the conductive element 132 can be disposed at the end of the current collector facing the electrode post 120. The conductive element 132 can be fixedly connected to the current collector using processes such as ultrasonic welding or laser welding to form a low-resistance path. During the charging and discharging process of the battery 100, current is generated on the active material layer, flows through the current collector, and then through the conductive element 132 to the electrode post 120, thus achieving electrical connection between the conductive element 132 and the active material layer.

[0051] In this way, the current in the cell body 131 can be stably transmitted to the terminal 120 through the conductive element 132, reducing the resistance loss in the current conduction process and improving the charging and discharging efficiency of the battery 100.

[0052] Understandably, the cell body 131 of the battery 100 of this application can be a wound core structure or a stacked core structure.

[0053] 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.

[0054] 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.

[0055] According to some embodiments of this utility model, the conductive element 132 may include multiple tabs, which are integrally formed with the current collector. The current collector and the tabs are formed as a continuous structure, which can reduce the connection nodes between the two, reduce the contact resistance between the conductive element 132 and the current collector, and at the same time help to improve the structural strength of the connection between the tabs and the current collector, so as to avoid the conductive element 132 from the cell body 131 due to vibration, impact and other factors during the use of the battery 100, thereby improving the structural reliability of the cell body 131.

[0056] According to some embodiments of this utility model, the conductive component 132 may include multiple tabs, which are separately formed from the current collector. Exemplarily, after the tabs and current collector are separately formed, when the active material layer is coated on the current collector, a blank area is reserved. The tabs are then integrally formed with the current collector in the blank area by ultrasonic welding or laser welding. Separate forming of the tabs and current collector allows for the selection of different materials and processing techniques according to their respective performance requirements, improving design flexibility. For example, the tabs can be made of materials with better conductivity, such as copper (high conductivity, moderate cost), aluminum (lightweight, low price), gold (strong oxidation resistance, low contact resistance, suitable for precision electronic components and high-frequency circuits), silver (highest conductivity in nature, often used in high-requirement conductive applications), as well as novel high-conductivity materials such as graphene and carbon nanotubes. The current collector can be made of higher strength materials, such as copper foil (good conductivity and mechanical strength, commonly used in the negative electrode of battery 100), aluminum foil (lightweight and corrosion resistant, suitable for the positive electrode of battery 100), and a new type of carbon nanotube composite film (which has both high conductivity and high strength, and can improve the cycle performance of battery 100), thereby reducing production costs while meeting different performance requirements.

[0057] refer to Figure 2 , Figure 3 and Figure 4 In some embodiments, the conductive element 132 further includes a convergence section 1324 and a bending section 1323. The first section 1321 is connected to the cell body 131 through the convergence section 1324, and the second section 1322 is connected to the first section 1321 through the bending section 1323. As mentioned above, whether it is a wound-core type cell body 131 or a stacked-core type cell body 131, multiple tabs are led out from one end of the cell body 131 facing the terminal post 120. The multiple tabs are stacked to form the conductive element 132. Through the convergence section 1324, the conductive element 132 gradually converges when it extends to the first section 1321, which is beneficial to improve the structural stability of the conductive element 132. At the same time, it increases the current concentration on the conductive element 132 and reduces the energy loss caused by current dispersion, thereby improving the rate performance of the battery 100.

[0058] By using the converging section 1324, the first section 1321, the bending section 1323, and the second section 1322, the conductive component 132 is formed into a continuous, seamless integral structure, which helps to reduce stress concentration on the conductive component 132 and extend its service life.

[0059] The centerline of the terminal post 120 extends through the convergence section 1324 in the first direction. In other words, the conductive element 132 is converged to the position corresponding to the terminal post 120. After the conductive element 132 is welded to the terminal post 120, the current path from the cell body 131 to the terminal post 120 is short, which helps to reduce the internal resistance of the battery 100 and further improve the conductivity of the battery 100.

[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 120 is fixedly mounted to the mounting bracket 140. For example, the terminal 120 can be fixedly mounted to the mounting bracket 140 by an interference fit, or the terminal 120 can 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 120, ensuring that the terminal 120 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 120.

[0062] The terminal post 120 is insulated from the housing assembly 110. Exemplarily, the terminal post 120 may be insulated from the mounting bracket 140, for example, by applying insulating adhesive to the contact surfaces of the terminal post 120 and the mounting bracket 140. Alternatively, the mounting bracket 140 may be an insulating element to insulate the terminal post 120 from the housing assembly 110. Alternatively, the contact surfaces of the mounting bracket 140 and the housing assembly 110 may be provided with insulating adhesive, and an insulating element may be provided on the surface of the mounting bracket 140 facing the housing assembly 110 to insulate the terminal post 120 from the housing assembly 110.

[0063] In this way, by making the terminal 120 relatively insulated from the housing assembly 110, short circuits between the terminal 120 and the housing assembly 110 are avoided, which helps to improve the safety of the battery 100.

[0064] In some embodiments, the conductive element 132 may include a plurality of stacked tabs. The end of the conductive element 132 away from the cell body 131 forms a tail. The plurality of tabs are flush at the tail. In this way, the conductive element 132 has higher integrity. At the tail, the restraint between the plurality of tabs is stronger and the structure is more uniform. This helps to avoid situations such as poor soldering or desoldering. It also prevents the tail of the conductive element 132 from being inserted backward into the cell body 131, thereby improving the safety of the battery 100.

[0065] In some embodiments, the conductive element 132 includes multiple stacked tabs. The end of the conductive element 132 away from the cell body 131 forms a tail, and the multiple tabs are staggered at the tail. This results in a more uniform interlayer arrangement of the tabs, providing a larger heat dissipation area. When welding the conductive element 132 to the terminal post 120, heat can be distributed more evenly, avoiding damage to the conductive element 132 due to localized overheating. Simultaneously, the reasonable interlayer distribution of the tabs helps to coordinate the tension on the second section 1322, preventing excessive tension inside the conductive element 132 that could cause tearing at the welding point between the second section 1322 and the terminal post 120, thus improving the structural reliability of the battery 100.

[0066] Secondly, embodiments of this application also provide an electrical device, including the battery 100 described above.

[0067] 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.

[0068] 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.

[0069] The electrical device of this application, by using the aforementioned battery 100, improves the connection stability between the terminal 120 and the conductive element 132. At the same time, the battery 100 has sufficient energy density to provide a stable and efficient energy supply for the electrical device, extend the battery life of the electrical device, reduce the risk of damage to the electrical device due to battery 100 failure, and improve the overall performance of the electrical device.

[0070] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0071] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery (100) characterized in that, include: A housing assembly (110) defines a mounting cavity (111) therein, and the housing assembly (110) is provided with a mounting hole communicating with the mounting cavity (111) along a first direction; The pole post (120) is disposed in the mounting hole; The battery cell assembly (130) includes: The battery cell body (131) is disposed in the mounting cavity (111). A conductive element (132) is located in the mounting cavity (111). The conductive element (132) includes a first segment (1321) and a second segment (1322) arranged at intervals along a first direction. The two ends of the first segment (1321) are respectively connected to the second segment (1322) and the battery cell body (131). The second segment (1322) is welded to the terminal post (120). A first bending groove (132a) is defined between the first segment (1321) and the cell body (131), and a second bending groove (132b) is defined between the second segment (1322) and the first segment (1321). The first bending groove (132a) and the second bending groove (132b) gradually approach the pole post (120) along the first direction. The width H of the second bending groove (132b) along the first direction satisfies: 1mm≤H≤3mm.

2. The battery (100) according to claim 1, characterized in that The conductive element (132) includes a bent section (1323), the two ends of which are connected to the first section (1321) and the second section (1322) respectively. The pole post (120) is welded to the second segment (1322) to form a welding area (1322a). The distance C between the end of the bent segment (1323) away from the second segment (1322) along the second direction and the welding area (1322a) satisfies: 1mm≤C≤6mm.

3. The battery (100) of claim 1, wherein, The battery cell body (131) includes a current collector, on which an active material layer is disposed, and a conductive element (132) is disposed at one end of the current collector, and the conductive element (132) is electrically connected to the active material layer.

4. The battery (100) according to claim 3, characterized in that The conductive element (132) includes a plurality of stacked tabs, which are integrally formed with the current collector.

5. The battery (100) of claim 3, wherein, The conductive element (132) includes a plurality of stacked tabs, which are separately formed from the current collector.

6. The battery (100) of claim 1, wherein, The conductive component (132) further includes a retractable section (1324) and a bending section (1323). The first section (1321) is connected to the battery cell body (131) through the retractable section (1324), and the second section (1322) is connected to the first section (1321) through the bending section (1323). The centerline of the pole (120) extends along the first direction through the converging section (1324).

7. The battery (100) according to any one of claims 1-6, characterized in that, Also includes: Mounting bracket (140), the mounting bracket (140) is fixedly mounted in the mounting hole, the pole post (120) is fixedly mounted in the mounting bracket (140), and / or, The pole (120) is insulated from the housing assembly (110).

8. The battery (100) according to any one of claims 1-6, characterized in that, The conductive piece (132) includes a plurality of stacked tabs, and an end of the conductive piece (132) away from the battery body (131) forms a tail portion, and the plurality of tabs are flushly arranged at the tail portion.

9. The battery (100) according to any one of claims 1-6, characterized in that, The conductive piece (132) includes a plurality of stacked tabs, and an end of the conductive piece (132) away from the battery body (131) forms a tail portion, and the plurality of tabs are staggeredly arranged at the tail portion.

10. An electric device, characterized by A battery (100) according to any one of claims 1-9.

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