Battery and electric device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery and an electric device. The battery comprises a shell, a pole group and an end cover, openings are formed in the two ends of the shell in the first direction, the pole group comprises at least two pole group split bodies arranged in the second direction, the end cover comprises a cover plate and a lower plastic part, the cover plate covers the openings, and the lower plastic part is arranged on the side, facing the shell, of the cover plate and abuts against the pole group. The cover plate and the lower plastic part are both of a flat plate structure, so that the lower plastic part can be well attached to the cover plate, the defects of tab clamping and the like caused by an overlarge gap between the cover plate and the lower plastic part are prevented, the tab is further prevented from being torn and broken, and the service life of the battery is prolonged; the cover plate adopts a flat plate structure, so that the pole group is supported in a more balanced manner, and the internal space of the shell is saved; the pole group is divided into the plurality of pole group split bodies, so that the size of the single pole group split body is reduced, and the condition that the pole group is bent and deformed due to overlarge size is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery and an electrical device. Background Technology

[0002] Batteries, as an important energy storage device, are widely used in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] A battery consists of a casing, electrode assembly, and end caps. The electrode assembly is housed within the casing, and the end caps include a cover plate and a lower plastic component. The cover plate covers the opening in the casing, and the electrode tabs of the electrode assembly pass through the lower plastic component and connect to the cover plate. To increase battery capacity, current battery designs focus on making the electrode assembly longer and wider. However, when the electrode assembly is too long or wide, it often bends and deforms due to strength issues, leading to defects such as wrinkles, deformation, delamination, and breakage of the electrode sheets, resulting in reduced yield. Furthermore, existing cover plates and lower plastic components typically have grooves, irregular holes, etc., which can cause the electrode tabs to easily get stuck between the cover plate and the lower plastic component. This makes the electrode tabs prone to tearing and breaking when the battery is shaken, leading to battery damage and failure.

[0004] Therefore, there is an urgent need for a battery and power supply device to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a battery and electrical device that can shorten the size of individual electrode components, avoiding bending and deformation of the electrode components due to excessive size; the lower plastic part can adhere well to the cover plate, preventing problems such as stuck electrode tabs caused by excessive gap between the two, thereby avoiding tearing and breakage of the electrode tabs.

[0006] To achieve the above objectives, the following technical solution is provided:

[0007] A battery comprising:

[0008] The housing has openings at both ends along a first direction;

[0009] A pole group includes at least two pole groups arranged along a second direction;

[0010] An end cap includes a cover plate and a lower plastic component. The cover plate covers the opening, and the lower plastic component is disposed on the side of the cover plate facing the housing and abuts against the electrode assembly. Both the cover plate and the lower plastic component are flat plate structures, and the first direction and the second direction are arranged at an angle.

[0011] As an optional solution, the lower plastic part is provided with a first clearance hole, and the electrode group is provided with electrode tabs at both ends along the first direction. The electrode tabs pass through the corresponding first clearance holes and are connected to the cover plate.

[0012] As an optional feature, the end cap also includes a fixing member, through which the lower plastic part is connected to the cover plate.

[0013] Alternatively, the fastener protrudes from the lower plastic part along the direction of the cover plate toward the interior of the housing.

[0014] As an optional solution, the size of the protrusion of the fastener from the lower plastic part is H, where H is greater than or equal to 0.5 mm and less than or equal to 4 mm.

[0015] Alternatively, the battery may further include a separator, the separator comprising:

[0016] The main plate is sandwiched between two adjacent polar component parts;

[0017] A fixing part is disposed at both ends of the main body plate along the first direction. The fixing part is formed by extending from both ends of the main body plate along the first direction toward the second direction. The fixing part abuts against the side of the polar component along the first direction.

[0018] As an optional solution, the dimension of the fixing part in the first direction is W, where W is greater than or equal to 0.5 mm and less than or equal to 4 mm.

[0019] As an optional solution, the battery further includes a fixing mechanism, which includes at least two fixing sleeves, the at least two fixing sleeves being arranged at intervals along a second direction, and the fixing sleeves being fitted onto the outer periphery of the electrode assembly.

[0020] As an optional solution, the fixing mechanism further includes side plates, which are disposed on both sides of the electrode group along the second direction, and the fixing sleeve is sleeved on the side plates and the outer periphery of the electrode group.

[0021] An electrical device includes a main body and the battery described above, the battery being configured to supply power to the main body of the electrical device.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] The battery provided by this utility model divides the electrode assembly into multiple electrode components to shorten the size of each individual electrode component, avoiding bending and deformation due to excessive length / width of the electrode assembly, and preventing problems such as wrinkles, deformation, delamination, and breakage of the electrode sheets. By setting both the cover plate and the lower plastic part as a flat structure, the lower plastic part can adhere well to the cover plate, preventing defects such as stuck tabs caused by excessive gaps between the two, thereby avoiding tab tearing and extending the battery's service life. The flat structure of the cover plate provides more balanced support for the electrode assembly and saves more internal space in the casing.

[0024] The electrical device provided by this utility model, by using the aforementioned battery, has a long service life, as well as high battery capacity and high voltage, thereby improving the device's endurance and safety performance. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 An exploded view of the battery provided in Embodiment 1 of this utility model;

[0027] Figure 2 This is a schematic diagram of the end cap provided in Embodiment 1 of the present utility model;

[0028] Figure 3 This is a cross-sectional view of the end cap provided in Embodiment 1 of this utility model;

[0029] Figure 4 This is a structural schematic diagram of the fixing mechanism and partition provided in Embodiment 1 of this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the fixing sleeve provided in Embodiment 1 of this utility model;

[0031] Figure 6 This is a first structural schematic diagram of the partition provided in Embodiment 1 of this utility model;

[0032] Figure 7 This is a schematic diagram of the second structure of the partition provided in Embodiment 1 of this utility model;

[0033] Figure 8 This is a schematic diagram of the structure of the fixing sleeve provided in Embodiment 2 of this utility model;

[0034] Figure 9This is a structural schematic diagram of the vehicle provided in Embodiment 3 of this utility model.

[0035] Figure label:

[0036] 1000, vehicles;

[0037] 100. Battery;

[0038] 10. Housing; 11. Explosion-proof vent;

[0039] 20. End cap; 21. Cover plate; 22. Lower plastic part; 221. First clearance hole; 23. Fixing component;

[0040] 30. Electrode group; 31. Electrode group components;

[0041] 40. Insulating film; 41. Second clearance hole;

[0042] 50. Fixing mechanism; 51. Side plate; 52. Fixing sleeve; 521. First connecting plate; 522. Second connecting plate; 5221. Through hole;

[0043] 60. Partition; 61. Main body plate; 62. Fixing part;

[0044] 200, controller; 300, motor. Detailed Implementation

[0045] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0051] Example 1

[0052] like Figure 1As shown, this embodiment provides a battery 100, which includes a housing 10 and an electrode assembly 30. The electrode assembly 30 is disposed within the housing 10, and the housing 10 serves to support and protect the electrode assembly 30. The housing 10 can be made of plastic or metal. When the housing 10 is made of metal, it has better heat dissipation performance, higher strength, and can provide support itself.

[0053] In this embodiment, the housing 10 has openings at both ends along the first direction. The battery 100 also includes two end caps 20, which are respectively placed over the corresponding openings. The electrode assembly 30 is connected to the end caps 20, and the end caps 20 are connected to the main body of the external electrical device, thereby enabling the battery 100 to supply power to the main body of the electrical device. In this embodiment, the first direction is the length direction of the housing 10.

[0054] In current technologies, to increase battery capacity, batteries are being developed with longer / wider electrode assemblies. However, when the electrode assemblies are too long / wide, they often bend and deform due to strength issues, leading to defects such as wrinkles, deformation, delamination, and breakage, resulting in reduced yield. Furthermore, existing cover plates and lower plastic components typically have grooves, irregular holes, etc., which can cause the tabs to easily get stuck between the cover plate and the lower plastic component. This makes the tabs prone to tearing and breaking when the battery is shaken, leading to battery damage and failure.

[0055] To solve the above problems, such as Figures 1-3 As shown, the electrode assembly 30 includes at least two electrode assembly sub-assemblies 31 arranged along the second direction. The end cap 20 includes a cover plate 21 and a lower plastic part 22. The cover plate 21 covers the opening of the housing 10, and the lower plastic part 22 is disposed on the side of the cover plate 21 facing the housing 10 and abuts against the electrode assembly 30. Both the cover plate 21 and the lower plastic part 22 are flat plate structures.

[0056] The battery 100 provided in this embodiment divides the electrode assembly 30 into multiple electrode assembly components 31 to shorten the size of each individual electrode assembly component 31, avoiding bending and deformation of the electrode assembly 30 due to excessive length / width, and preventing problems such as wrinkles, deformation, delamination, and breakage of the electrode sheets; by setting both the cover plate 21 and the lower plastic part 22 as flat structures, the lower plastic part 22 can adhere well to the cover plate 21, preventing defects such as stuck tabs caused by excessive gap between the two, thereby avoiding tearing and breakage of the tabs and extending the service life of the battery 100; the flat structure of the cover plate 21 provides more balanced support for the electrode assembly 30 and saves more internal space of the housing 10.

[0057] In this embodiment, the first direction is the length direction of the battery 100, and the second direction is the width direction of the battery 100. That is, the first direction and the second direction are perpendicular to each other. In other embodiments, the first direction and the second direction may also be set at other angles, which are not limited here. In another optional embodiment, the first direction may be the length direction of the battery 100, and the second direction may be the width direction of the battery 100.

[0058] The electrode component 31 in this application can be formed by winding or by stacking. Generally, the electrode component 31 includes at least a positive electrode, a separator, and a negative electrode.

[0059] Optionally, the cover plate 21 is made of plain aluminum sheet. Plain aluminum sheet has advantages such as easy processing and forming, light weight, and good thermal conductivity.

[0060] Optionally, a polarity mark is provided on the cover plate 21 to mark the positive and negative terminals of the battery 100, so as to distinguish the positive and negative terminals of the battery 100.

[0061] Optionally, the lower plastic part 22 is provided with a first clearance hole 221, and the electrode assembly 30 is provided with electrode tabs at both ends along the first direction. The electrode tabs pass through the corresponding first clearance hole 221 and are connected to the cover plate 21. The first clearance hole 221 realizes the clearance function of the lower plastic part 22 for the electrode tabs.

[0062] Optionally, the end cap 20 also includes a fixing member 23. Two fixing members 23 are arranged at intervals along the length of the cover plate 21. The lower plastic part 22 is connected to the cover plate 21 through the fixing member 23. The fixing member 23 abuts against the electrode assembly 30 to improve the connection strength between the lower plastic part 22 and the cover plate 21.

[0063] Optionally, along the direction of the cover plate 21 toward the interior of the housing 10, the fixing member 23 protrudes from the lower plastic part 22, so that there is a gap between the lower plastic part 22 and the electrode group 30, which facilitates venting and improves the safety performance of the battery 100.

[0064] Optionally, the protrusion of the fixing member 23 from the lower plastic member 22 is H, where H is greater than or equal to 0.5 mm and less than or equal to 4 mm. This is to prevent the gap between the lower plastic member 22 and the electrode assembly 30 from being too small, which would affect exhaust, and to prevent the gap between the lower plastic member 22 and the electrode assembly 30 from being too large, which would occupy too much space inside the housing 10. For example, the value of H can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, or 4 mm. In other embodiments, the value of H is not limited to these values, and designers can make adaptive adjustments according to actual needs.

[0065] like Figure 1 , Figure 4 and Figure 5As shown, the battery 100 also includes a fixing mechanism 50, which includes two fixing sleeves 52. The fixing sleeves 52 are sleeved on the outer periphery of the electrode assembly 30. The two fixing sleeves 52 are arranged at intervals along a first direction and are respectively located at both ends of the electrode assembly 30 along the first direction. In other embodiments, the number of fixing sleeves 52 can be three, four or more, with multiple fixing sleeves 52 located at both ends of the electrode assembly 30 along a second direction. By setting fixing sleeves 52 on the outer periphery of the electrode assembly 30, multiple electrode assembly components 31 are firmly fixed together, preventing the electrode assembly components 31 from shaking, colliding with each other or shifting, thereby avoiding deformation and damage to the electrode assembly components 31, improving the structural stability of the electrode assembly 30, and extending the service life of the battery 100.

[0066] Specifically, the fixing sleeve 52 includes two first connecting plates 521 arranged along the second direction and two second connecting plates 522 arranged along the third direction. The first connecting plates 521 and the second connecting plates 522 are connected end to end to form a structure with open ends. During assembly, the fixing sleeve 52 is inserted into the outside of the pole group 30 and the side plate 51 from one end of the pole group 30 along the first direction, making the installation simple and quick.

[0067] Optionally, the thickness of both the first connecting plate 521 and the second connecting plate 522 is T2, where T2 is greater than or equal to 0.5 mm and less than or equal to 2 mm. This ensures the overall strength of the first connecting plate 521 and the second connecting plate 522 while preventing them from being too thick and occupying excessive space inside the housing 10. For example, the value of T2 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm. Of course, in other embodiments, the value of T2 is not limited to these values, and designers can make adaptive adjustments according to actual needs.

[0068] In this embodiment, the third direction is the thickness direction of the battery 100, meaning that the first direction, the second direction, and the third direction are perpendicular to each other. In other embodiments, the first direction, the second direction, and the third direction can also be set at other included angles.

[0069] Optionally, the fixing mechanism 50 further includes side plates 51, which are disposed on both sides of the electrode assembly 30 along the first direction, and fixing sleeves 52 are sleeved on the side plates 51 and the outer periphery of the electrode assembly 30. By providing side plates 51 on both sides of the electrode assembly 30, it is possible to prevent the fixing sleeves 52 from damaging the electrode assembly 31, and to prevent the sides of the electrode assembly 30 from directly contacting the inner wall of the housing 10 when the electrode assembly 30 is inserted into the housing, thereby avoiding damage to the electrode assembly 30 when it is inserted into the housing.

[0070] Optionally, the fixing sleeve 52 is molded by one-piece injection molding, which has high strength and high production efficiency.

[0071] like Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown, the battery 100 also includes a separator 60, which is sandwiched between two adjacent electrode components 31 to support the electrode components 31 and prevent short circuits between the two adjacent electrode components 31.

[0072] Specifically, the partition 60 includes a main plate 61 and a fixing part 62. The main plate 61 is sandwiched between two adjacent polar component parts 31. The fixing part 62 is provided at both ends of the main plate 61 along the first direction. The fixing part 62 is formed by extending from both ends of the main plate 61 along the first direction to the second direction. The fixing part 62 abuts against the side of the polar component parts 31 along the first direction. By providing the fixing part 62, the polar component parts 31 are limited along the first direction, and the polar component parts 31 are prevented from shifting along the second direction.

[0073] Optionally, the dimension of the fixing part 62 in the first direction is W, where W is greater than or equal to 0.5 mm and less than or equal to 4 mm. This ensures that the fixing part 62 provides a good limiting effect on the polar component 31, while avoiding the fixing part 62 being too large in the first direction and occupying too much space inside the housing 10. For example, the value of W can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, or 4 mm. Of course, in other embodiments, the value of W is not limited to these values, and designers can make adaptive adjustments according to actual needs.

[0074] Optionally, the main body plate 61 has a dimension T1 in the second direction, meaning its thickness is T1, which is greater than or equal to 0.5 mm and less than or equal to 3 mm. This ensures good isolation between the main body plate 61 and the adjacent electrode components 31, while avoiding excessive thickness that would occupy too much space inside the casing 10 and affect the energy density of the battery 100. For example, the value of T1 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3 mm. Of course, in other embodiments, the value of T2 is not limited to these values, and designers can make adaptive adjustments according to actual needs.

[0075] like Figure 1As shown, the housing 10 has two explosion-proof holes 11 on one side along a third direction. The two explosion-proof holes 11 are arranged at intervals along the first direction. An explosion-proof valve is installed in each explosion-proof hole 11. When an internal energy abnormality occurs in the battery 100, the gas pressure inside the housing 10 reaches the explosion-proof threshold of the explosion-proof valve. The explosion-proof valve opens, and the gas is discharged from the explosion-proof hole 11, releasing the internal pressure of the housing 10 and preventing the battery 100 from thermal runaway and exploding or catching fire, thereby improving the safety of the battery 100. In other embodiments, the number and location of the explosion-proof holes 11 can be adjusted according to actual needs.

[0076] like Figure 1 As shown, the battery 100 also includes an insulating film 40, which covers the outer periphery of the electrode assembly 30 and the fixing mechanism 50 and is located inside the housing 10. After the electrode assembly 30 and the fixing mechanism 50 are assembled, the insulating film 40 is applied, and then the electrode assembly 30 covered with the insulating film 40 is installed into the housing 10. The insulating film 40 improves the insulation protection capability of the electrode assembly 30. Specifically, the insulating film 40 is a Mylar film.

[0077] Optionally, the insulating film 40 is provided with second clearance holes 41 on both sides along the first direction so that the electrode tab can extend out through the second clearance holes 41.

[0078] Optionally, the insulating film 40 is provided with slits, and the explosion-proof holes 11 are provided directly opposite to the slits and in a one-to-one correspondence, so that the gas in the electrode group 30 can be quickly discharged through the slits.

[0079] Example 2

[0080] This embodiment provides a battery 100, the specific structure of which is basically the same as that of the battery 100 in Embodiment 1, except that the specific structure of the second connecting plate 522 is different.

[0081] like Figure 8 As shown, the second connecting plate 522 is provided with a plurality of through holes 5221, which are arranged in an array to facilitate the venting and flow of electrolyte.

[0082] Example 3

[0083] This embodiment provides an electrical device, which includes a main body and a battery 100 provided in Embodiment 1 or Embodiment 2. The battery 100 can provide electrical energy to the main body of the electrical device, thereby enabling the main body of the electrical device to automatically complete preset actions through electrical energy, ensuring good performance of the main body of the electrical device, and ensuring the service life and safety performance of the electrical device.

[0084] Specifically, the main body of the electrical device can be a vehicle, mobile phone, portable device, laptop, ship, spacecraft, electric toy, or power tool, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles or hybrid electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, or electric planers, etc. This embodiment does not limit the main body of the aforementioned electrical device.

[0085] The following examples are for illustrative purposes only. Figure 9 As shown, an embodiment of this application will be described using a vehicle 1000 as an example of an electrical device. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. There can be one or more batteries 100, and these batteries can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that some of the batteries 100 are connected in series and others in parallel.

[0086] Battery 100 can be used to power vehicle 1000, for example, battery 100 can be used as operating power for vehicle 1000. Vehicle 1000 may also include controller 200 and motor 300, controller 200 is used to control battery 100 to power motor 300, for example, for the power needs of vehicle 100 during start-up, navigation and driving.

[0087] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0088] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery, characterized in that, include: The housing (10) has openings at both ends along a first direction; The pole group (30) includes at least two pole group components (31) arranged along the second direction; End cap (20) includes cover plate (21) and lower plastic part (22). The cover plate (21) covers the opening. The lower plastic part (22) is disposed on the side of the cover plate (21) facing the housing (10) and abuts against the pole group (30). The cover plate (21) and the lower plastic part (22) are both flat plate structures. The first direction and the second direction are arranged at an angle.

2. The battery according to claim 1, characterized in that, The lower plastic part (22) is provided with a first clearance hole (221), and the electrode group (30) is provided with electrode tabs at both ends along the first direction. The electrode tabs pass through the corresponding first clearance hole (221) and are connected to the cover plate (21).

3. The battery according to claim 1, characterized in that, The end cap (20) also includes a fixing member (23), and the lower plastic part (22) is connected to the cover plate (21) through the fixing member (23).

4. The battery according to claim 3, characterized in that, Along the direction of the cover plate (21) toward the interior of the housing (10), the fastener (23) protrudes from the lower plastic part (22).

5. The battery of claim 4, wherein, The size of the protrusion of the fastener (23) from the lower plastic part (22) is H, where H is greater than or equal to 0.5 mm and less than or equal to 4 mm.

6. The battery according to any one of claims 1 to 5, wherein The battery further includes a separator (60), the separator (60) comprising: The main body plate (61) is sandwiched between two adjacent polar component parts (31); A fixing part (62) is provided at both ends of the main body plate (61) along the first direction. The fixing part (62) is formed by extending from both ends of the main body plate (61) along the first direction toward the second direction. The fixing part (62) abuts against the side of the polar component (31) along the first direction.

7. The battery according to claim 6, characterized in that, The dimension of the fixing part (62) in the first direction is W, which is greater than or equal to 0.5 mm and less than or equal to 4 mm.

8. The battery according to any one of claims 1-5, characterized in that, The battery also includes a fixing mechanism (50), which includes at least two fixing sleeves (52), which are arranged at intervals along the first direction, and the fixing sleeves (52) are sleeved on the outer periphery of the electrode group (30).

9. The battery of claim 8, wherein, The fixing mechanism (50) further includes a side plate (51), which is disposed on both sides of the pole group (30) along the second direction, and the fixing sleeve (52) is sleeved on the side plate (51) and the outer periphery of the pole group (30).

10. An electrical appliance, comprising an electrical appliance body, characterized in that, The electrical device further includes a battery as described in any one of claims 1-9, the battery being configured to supply power to the main body of the electrical device.

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