Battery cover plate, battery and electronic equipment

Abstract

The invention provides a battery cover plate, a battery and electronic equipment. The battery cover plate comprises a body, and the body comprises a first surface and a second surface which are arranged oppositely. The body is provided with an installation hole, and the installation hole penetrates through the body in the direction from the first face to the second face. A mounting part is arranged in the mounting hole and is arranged along the circumferential direction of the mounting hole. The battery cover plate further comprises a sealing ring, a pole and an insulating ring, the sealing ring and the pole can be installed in the installation hole, the sealing ring is located between the pole and the installation part, and the pole can be sleeved with the insulating ring. The body is also provided with a crimping part, and the crimping part is arranged on the first surface and is located at the orifice of the mounting hole. According to the battery cover plate, the crimping part can be buckled and pressed on the insulating ring, so that the pole post presses the sealing ring to the mounting part, the pole post can be reliably connected with the body while the sealing of the battery cover plate is realized, the structure of the battery cover plate is simplified, the cost of a battery applying the battery cover plate is controlled, and the battery cover plate is convenient to use. And the cost of the electronic equipment is reduced.

Description

[0001] This application is a divisional application. The application number of the original application is 202211583516.4, and the original application date is December 9, 2022. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery cover, a battery and an electronic device. Background Art

[0003] As an important component of the energy storage system, the cost of power batteries can account for more than 50% of the total cost of the entire system. Therefore, reducing the cost of power batteries has an important impact on the total cost of the energy storage system. Power batteries usually include a shell, a cover plate, and a bare cell accommodated between the shell and the cover plate. Among them, the cost of structural parts such as the shell and the cover plate can account for about 10% of the total cost of the power battery. Reducing the cost of these structural parts has become the main cost reduction solution currently adopted by the industry.

[0004] As an important component of the structure of the power battery, the cover plate has the functions of sealing, insulation, shaping and flow guidance, etc. In order to play the above roles, the cover plate usually includes multiple parts, and the parts cooperate with each other, which makes the structure of the cover plate more complicated.

[0005] Based on this, how to effectively control the cost of power batteries by simplifying the structure of the cover plate has become one of the main research topics for technicians in this field. Summary of the invention

[0006] The present application provides a battery cover, a battery and an electronic device, which simplifies the battery structure by simplifying the design of the battery cover structure, thereby reducing the battery cost and thus reducing the cost of the electronic device using the battery.

[0007] In the first aspect, the present application provides a battery cover, which may include a body, a pole, a sealing ring and an insulating ring. Among them, the body may include a first surface and a second surface disposed opposite to each other, and the body has a mounting hole, and the mounting hole may penetrate the body in the direction from the first surface to the second surface. In addition, a mounting portion may be provided in the mounting hole, and the mounting portion may be arranged along the circumference of the mounting hole. The insulating ring may be sleeved on the circumferential periphery of the pole, the sealing ring and the pole may be installed in the mounting hole, and the sealing ring is located between the mounting portion and the pole. In the present application, the body may also have a crimping portion, which may be arranged on the first surface, and the crimping portion is located at the orifice of the mounting hole. In addition, the crimping portion may be buckled on the insulating ring so that the pole presses the sealing ring toward the mounting portion, thereby realizing the sealing of the battery cover and reliably connecting the pole to the body. The battery cover provided by the present application is adopted, and the fixing of the pole on the body is realized by the crimping portion on the body, which can effectively simplify the structure of the battery cover, thereby helping to reduce the cost of the battery cover.

[0008] It is worth mentioning that in the present application, the body and the crimping portion can be an integrally formed structure. The crimping portion can be understood as a part of the body, which can be formed by, but not limited to, extrusion molding. Based on this, there is no need to set a separate fixing for fixing the pole on the body, thereby achieving a simplified design of the structure of the battery cover.

[0009] In addition, the mounting portion and the body may also be an integrally formed structure, thereby improving the structural stability of the battery cover. In order to enable the mounting portion to reliably support the sealing ring and the pole, the thickness of the mounting portion may be greater than or equal to 30% of the total thickness of the body and less than or equal to 70% of the total thickness of the body in the direction from the first surface to the second surface, which may also be conducive to realizing a thinning design of the battery cover.

[0010] When the pole is specifically arranged, the pole may include a first section and a second section connected to each other in the direction from the first surface to the second surface. The cross-sectional area of ​​the first section is smaller than the cross-sectional area of ​​the second section, so that the second section has a bearing surface arranged in the extension direction of the first section. At least part of the insulating ring may overlap the bearing surface, so that the crimping portion may be buckled on the part of the insulating ring overlapping the bearing surface, so that conductive contact between the crimping portion and the pole can be avoided.

[0011] In addition, an inclined surface may be provided at the edge of the second section of the pole, and the inclined surface may be inclined from the bearing surface in a direction away from the first section, and at least a portion of the insulating ring may be sleeved on the inclined surface. In this way, the crimping portion may be buckled on the portion of the insulating ring corresponding to the inclined surface. This not only realizes a reliable connection between the pole and the body and avoids conductive contact between the crimping portion and the pole, but also makes the processing technology of the crimping portion easier to control.

[0012] In the present application, an insulating ring can also be arranged on at least a portion of the first section, which can further improve the insulation effect of the insulating ring to improve the reliability of the pole operation, thereby facilitating the improvement of the operating reliability of the battery using the battery cover.

[0013] In a possible implementation of the present application, the thickness of the insulating ring may be greater than or equal to 0.3 mm and less than or equal to 3 mm, so as to ensure the structural reliability of the insulating ring while enabling the insulating ring to play a better insulating role between the crimping part and the pole.

[0014] In a possible implementation of the present application, in order to improve the structural reliability of the crimping portion, the thickness of the crimping portion can be greater than or equal to 0.5 mm and less than or equal to 4 mm. It can be selected according to the specific installation space so that it can apply reliable buckling pressure to the pole without significantly increasing the thickness of the battery cover.

[0015] In addition, in the present application, the compression amount of the sealing ring may be greater than or equal to 10% and less than or equal to 50%, so that it can ensure the sealing of the battery cover while also facilitating the thinning design of the battery cover.

[0016] In addition to the above structure, the battery cover provided by the present application may also include a spacer, which may be arranged on the second surface of the body. The spacer may be made of an insulating material such as polypropylene that is resistant to electrolyte corrosion, so as to avoid conductive contact between the body and the internal structure of the battery when the battery cover is applied to the battery. In addition, the spacer may have a avoidance hole arranged corresponding to the mounting hole, so as to facilitate the electrical connection between the pole and the internal structure of the battery.

[0017] In the present application, there is no specific limitation on the thickness of the spacer. For example, the thickness of the spacer in the direction from the first surface to the second surface can be greater than or equal to 2 mm and less than or equal to 10 mm, which can be specifically set according to the layout of the internal structure of the battery.

[0018] In a second aspect, the present application further provides a battery, which includes a battery shell and a battery cover of the first aspect. The battery cover is disposed on the battery shell and encapsulates the battery shell into a sealed structure. In the battery provided in the present application, since the structure of the battery cover is relatively simple, it is conducive to realizing a simplified design of the battery structure, thereby reducing the cost of the battery.

[0019] In a third aspect, the present application further provides an energy storage device, which may include a housing cavity and the battery described in the second aspect, and the battery may be accommodated in the housing cavity. The energy storage device may be used as a power supply device for an electrical device to supply power to the electrical device. Since the cost of the battery of the energy storage device is relatively low, it is beneficial to control the cost of the energy storage device.

[0020] In a fourth aspect, the present application further provides an energy storage system, which may include a power converter and the energy storage device of the third aspect. The power converter may be used to perform power conversion processing on the voltage and / or current, and input the converted voltage and / or current to the energy storage device, so that the energy storage device can meet the power requirements of the power-consuming device. Since the cost of the energy storage device in the energy storage system is relatively low, it can help reduce the cost of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1a A schematic diagram of the structure of a battery cover provided in one embodiment of the present application;

[0022] Figure 1b for Figure 1a AA cross-sectional view of the battery cover shown in;

[0023] Figure 2 A top view of a battery cover provided in one embodiment of the present application;

[0024] Figure 3 A top view of a battery cover provided in another embodiment of the present application;

[0025] Figure 4 A cross-sectional view of a pole provided in one embodiment of the present application;

[0026] Figure 5a for Figure 1a An exploded view of the battery cover shown in ;

[0027] Figure 5b for Figure 5a A side view of the battery cover shown in ;

[0028] Figure 6 A schematic diagram of the structure of a pole provided in another embodiment of the present application;

[0029] Figure 7 A schematic diagram of the structure of a battery cover provided in another embodiment of the present application;

[0030] Figure 8 for Figure 7 Exploded view of the battery cover shown in .

[0031] Reference numerals:

[0032] 1-battery cover; 101-body; 1011-first surface; 1012-second surface; 1013-mounting hole; 1014-mounting portion;

[0033] 1015-crimping part; 102-pole; 1021-first section; 1022-second section; 10221-bearing surface; 10222-inclined surface;

[0034] 103 - sealing ring; 104 - insulating ring; 105 - spacer ring; 1051 - avoidance hole. DETAILED DESCRIPTION

[0035] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context.

[0036] References to "one embodiment" or "a specific embodiment" described in this specification mean that one or more embodiments of the present application include a particular feature, structure or characteristic described in conjunction with the embodiment. The terms "include", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0037] In order to facilitate the understanding of the battery cover and battery provided in the embodiments of the present application, the following first introduces its application scenario. During the use of electronic equipment, a power supply device is usually required to power it. At present, various electronic devices, such as energy storage base stations, consumer electronic products (such as mobile phones, tablets or wearable devices) and electric vehicles, etc., can usually choose secondary batteries such as lithium-ion batteries, lead-acid batteries, sodium batteries, magnesium batteries, aluminum batteries and potassium batteries as power supply devices. Among them, in this application, secondary batteries (rechargeable battery) are also called rechargeable batteries, power batteries or storage batteries, which refer to batteries that can be activated by charging after the battery is discharged and continue to be used. In the following embodiments of the present application, unless otherwise specified, the batteries mentioned refer to secondary batteries.

[0038] The battery may generally include a battery shell and a battery cover, and the battery cover is covered on the battery shell to form a closed cavity between the battery cover and the battery shell. In some existing schemes, when the battery cover is specifically set, the battery cover may include a body, a sealing ring, a pole and a fixing. Among them, the pole and the sealing ring are installed on the body, the fixing is fixedly connected to the body, and the fixing is buckled on the pole, so that the pole presses the sealing ring under the extrusion of the fixing, thereby achieving the sealing of the battery cover. However, the structure of the battery cover is relatively complex and its manufacturing cost is relatively high.

[0039] At present, battery cost control has become a key issue for all manufacturers. The cost of structural parts such as battery cover can account for about 10% of the total battery cost, so cost control of these structural parts has become the main research direction for reducing battery costs.

[0040] Based on this, the present application provides a battery cover plate, which can reduce the cost of the battery cover plate by simplifying the structure of the battery cover plate, thereby reducing the cost of the battery using the battery cover plate. In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0041] Reference Figure 1a , Figure 1a A schematic diagram of the structure of a battery cover plate 1 provided in one embodiment of the present application. In this embodiment, the battery cover plate 1 may include a body 101, which may be, but not limited to, an integrally formed plate-like structure, and its shape may be, for example, a regular shape such as a rectangle or a circle, or may be set to some irregular shapes, which may be specifically designed according to the battery to which the battery cover plate 1 is applied, and is not limited in this application. In addition, the material of the body 101 may be, but not limited to, a metal with strong conductive properties such as aluminum.

[0042] Please refer to Figure 1b , Figure 1b for Figure 1a The AA cross-sectional view of the battery cover 1 is shown in FIG. The body 101 may have a first surface 1011 and a second surface 1012, and the first surface 1011 and the second surface 1012 may be arranged opposite to each other. In addition, the body 101 may be provided with a mounting hole 1013, and the mounting hole 1013 may penetrate the body 101 along the direction from the first surface 1011 to the second surface 1012.

[0043] In the present application, a mounting portion 1014 may be provided in the mounting hole 1013, and the mounting portion 1014 may be provided along the circumference of the mounting hole 1013. The mounting portion 1014 may be understood as a protruding structure provided along the circumference of the mounting hole 1013. In addition, the mounting portion 1014 may be an annular structure provided along the circumference of the mounting hole 1013; or the mounting portion 1014 may include a plurality of sections provided at intervals along the circumference of the mounting hole 1013. For example, the mounting portion 1014 may include two, three or four sections provided at intervals along the circumference of the mounting hole 1013. The present application does not limit the specific molding method of the mounting portion 1014. In a possible embodiment, the mounting portion 1014 may be an integrally molded structure with the body 101 to simplify the structure of the cover plate and make the structure of the cover plate more reliable.

[0044] You can continue to refer to Figure 1a and Figure 1bThe battery cover 1 may further include a pole 102, and the pole 102 may be two, namely a positive pole and a negative pole. It is understandable that the number of mounting holes 1013 on the body 101 may be the same as the number of poles 102, so that each pole 102 can be installed in a corresponding mounting hole 1013. Since the structures of the poles 102 may be the same, and the poles 102 may be installed on the body 101 in the same manner, in the following embodiments of the present application, one of the poles 102 is taken as an example to introduce the installation method of the pole 102 on the body 101.

[0045] In order to ensure the sealing of the battery cover 1, the battery cover 1 may also include a sealing ring 103. Figure 1b , the sealing ring 103 can also be installed in the mounting hole 1013, and the sealing ring 103 can be located between the pole 102 and the mounting portion 1014. The material of the sealing ring 103 can be, but is not limited to, a compressible material such as fluororubber and resistant to electrolyte corrosion. In the present application, the sealing ring 103 and the mounting portion 1014 can be bonded by an adhesive, so that the battery cover 1 has better sealing performance while reducing the processing difficulty of the surface of the mounting portion 1014 used to carry the sealing ring 103. In some other possible embodiments of the present application, the sealing ring 103 and the mounting portion 1014 may not be bonded to simplify the assembly steps of the battery cover 1.

[0046] In addition, the body 101 may also be provided with a crimping portion 1015, which may be provided on the first surface 1011 and located at the opening of the mounting hole 1013. The crimping portion 1015 may be buckled on the pole 102, so that the pole 102 can press the sealing ring 103 toward the mounting portion 1014, and the pole 102 and the body 101 can be reliably mounted.

[0047] In various embodiments of the present application, the thickness of the crimping portion 1015 can be greater than or equal to 0.5 mm and less than or equal to 4 mm. For example, it can be 1 mm, 1.5 mm, 2 mm, 2.3 mm or 3 mm. In the present application, the thickness of the crimping portion 1015 can be the same or different at various locations. In a possible embodiment, the thickness of the crimping portion 1015 used for connecting with the body 101 can be slightly greater than the thickness of other parts. By setting the thickness of the crimping portion 1015 within the above range, the space occupied by the crimping portion 1015 can be smaller in the direction from the first surface 1011 to the second surface 1012, so as to facilitate the thinning design of the battery cover 1. In addition, the crimping portion 1015 can also have a more reliable structural strength, which can be beneficial to improving the structural reliability of the battery cover 1.

[0048] In the present application, the cross-sectional shape of the pole 102 is not specifically limited. For example, reference may be made to Figure 2 , Figure 2 This is a top view of a battery cover plate 1 provided in one embodiment of the present application. Figure 2 In the embodiment shown, the cross-sectional shape of the pole 102 is circular. In this case, the crimping portion 1015 may include a plurality of arc segments arranged around the pole 102, such as Figure 2 In the embodiment, the crimping portion may include four arc segments, so that the crimping portion 1015 can apply a reliable buckling pressure to the pole 102. In addition, the cross-sectional shape of the pole 102 can also be Figure 3 The rectangle shown in Figure 3 In the illustrated embodiment, the crimping portion 1015 may include a plurality of straight segments arranged around the pole 102, and the plurality of straight segments are respectively buckled on the pole 102 to achieve a reliable connection between the pole 102 and the body. In addition, the cross-sectional shape of the pole 102 may also be other possible regular shapes or irregular shapes, and the arrangement of the crimping portion 1015 may be adjusted accordingly according to the pole 102, as long as the crimping portion 1015 can apply a reliable buckling force to the pole, which will not be listed here one by one.

[0049] It is worth mentioning that you can continue to refer to Figure 1b In the present application, the thickness of the mounting portion 1014 in the direction from the first surface 1011 to the second surface 1012 may be greater than or equal to 30% of the total thickness of the body 101, and less than or equal to 70% of the total thickness of the body 101, so that the mounting portion 1014 has a good supporting strength and the size of the battery cover 1 in this direction can be smaller. In addition, the compression amount of the sealing ring 103 may be greater than or equal to 10% and less than or equal to 50%, so that the sealing effect of the battery cover 1 can be ensured while the size of the battery cover 1 in the direction from the first surface 1011 to the second surface 1012 can be smaller, which is conducive to realizing the miniaturization design of the battery using the battery cover 1.

[0050] From the above introduction to the main body 101, it can be known that the main body 101 can be an integrally formed structure. In addition, in the present application, the crimping portion 1015 and the main body 101 can also be an integrally formed structure, then the crimping portion 1015 can be understood as a part of the main body 101, and the crimping portion 1015 can be but is not limited to being formed by extrusion molding. Since the material of the main body 101 is mostly metal, the material of the crimping portion 1015 can also be metal. In order to prevent the pole 102 from being conductively connected to the main body 101 when the crimping portion 1015 is buckled on the pole 102, the battery cover 1 can also include an insulating ring 104. The material of the insulating ring 104 can be but is not limited to acrylonitrile butadiene styrene (ABS), or polyphenylene sulfide (PPS) and other insulating, pressure-resistant and high-temperature resistant materials. By Figure 1b It can be seen that the insulating ring 104 can be sleeved on the circumferential periphery of the pole 102, that is, the insulating ring 104 is arranged around the circumference of the pole 102. In this way, when pressure is applied to the pole 102 through the crimping portion 1015, the crimping portion 1015 can be buckled on the insulating ring 104, thereby avoiding direct contact between the crimping portion 1015 and the pole 102, thereby reducing the risk of conductive connection between the pole 102 and the body 101.

[0051] In the present application, the shape of the insulating ring 104 can be specifically set according to the cross-sectional shape of the pole 102. Figure 2 In the battery cover 1 shown in the figure, the cross-sectional shape of the pole 102 is circular, and the cross-sectional shape of the insulating ring 104 can also be circular. Figure 3 In the battery cover 1 shown, the cross-sectional shape of the pole 102 is rectangular, and the cross-sectional shape of the insulating ring 104 may also be rectangular.

[0052] It is understandable that the insulating ring 104 can be directly formed on the pole 102 by injection molding, or the insulating ring 104 can be an independent structure, which can be sleeved on the pole 102 after molding, and this application does not specifically limit it. In addition, in this application, the thickness of the insulating ring 104 is not specifically limited. In a possible embodiment, the thickness of the insulating ring 104 can be greater than or equal to 0.3mm and less than or equal to 3mm. For example, it can be 0.5mm, 1mm, 1.3mm, 2mm or 2.5mm, etc. It can be adjusted according to the specific dimensions of the pole 102, the mounting hole 1013 and the crimping portion 1015, so as to play a better insulating role on the basis of having a small impact on the thickness of the battery cover 1.

[0053] In this application, in order to make the insulating ring 104 and the pole 102 reliably connected, refer to Figure 4, Figure 4 1 is a cross-sectional view of a pole 102 provided in an embodiment of the present application. In this embodiment, the pole 102 can be set in a stepped shape. Figure 1b and Figure 4 In the direction from the first surface 1011 to the second surface 1012, the pole 102 may include two connected sections, which are respectively recorded as the first section 1021 and the second section 1022. In the direction from the first surface 1011 to the second surface 1012, the height of the first section 1021 and the height of the second section 1022 may be substantially equal, so that the crimping portion 1015 has a sufficient thickness while being able to realize the thinning design of the battery cover 1, thereby meeting the strength requirement of the crimping portion 1015.

[0054] You can continue to refer to Figure 1b and Figure 4 , the cross-sectional area of ​​the first section 1021 is smaller than the cross-sectional area of ​​the second section 1022. In addition, in the direction from the first surface 1011 to the second surface 1012, the projection of the first section 1021 is located within the contour range of the projection of the second section 1022. In this way, the second section 1022 may have a bearing surface 10221 arranged in the extension direction of the first section 1021, wherein the extension direction of the first section 1021 may be the same as the direction from the second surface 1012 to the first surface 1011. Based on this, it can be understood that in the present application, the bearing surface 10221 may be arranged in the direction from the second surface 1012 to the first surface 1011. Then the insulating ring 104 may be sleeved at the connection between the first section 1021 and the second section 1022, and at least a portion of the insulating ring 104 may overlap the bearing surface 10221. Based on this, the crimping portion 1015 can be pressed on the portion of the insulating ring 104 overlapping the bearing surface 10221, so that the crimping portion 1015 can be easily pressed on the insulating ring 104 and the insulating ring 104 can be reliably connected to the pole 102.

[0055] It is understandable that there may be a certain gap between the crimping portion 1015 and the peripheral side surface of the first section 1021 to prevent the crimping portion 1015 from contacting the first section 1021 and causing a conductive connection between the two. In addition, the insulating ring 104 may wrap at least a portion of the first section 1021, so that at least a portion of the insulating ring 104 may be located in the gap between the crimping portion 1015 and the peripheral side surface of the first section 1021, which can prevent the crimping portion 1015 from contacting the first section 1021 and effectively reduce the difficulty of processing the crimping portion 1015.

[0056] In addition to the above structure, the battery cover 1 provided in the present application may further include a spacer 105, which may be disposed on the second surface 1012 of the body 101. In the present application, by disposing the spacer 105 on the second surface 1012 of the body 101, when the battery cover 1 is applied to a battery, the body 101 may be prevented from being in conductive contact with the internal structure of the battery, thereby improving the safety of the battery.

[0057] The material of the spacer 105 can be, but is not limited to, a material resistant to electrolyte corrosion, such as polypropylene (PP). In addition, the spacer 105 can have an avoidance hole 1051 corresponding to the mounting hole 1013, so that when the battery cover 1 is applied to the battery, the pole 102 is conveniently connected to the battery's pole ear through the avoidance hole 1051.

[0058] You can continue to refer to Figure 1b , in the direction from the first surface 1011 to the second surface 1012, the thickness of the spacer 105 may be greater than or equal to 2 mm and less than or equal to 10 mm, and may be 2.5 mm, 3 mm, 5 mm, 7 mm or 8.5 mm, etc. In addition, the projection of the spacer 105 on the body 101 may fall within the contour range of the second surface 1012 of the body 101, and the length dimension of the spacer 105 may be 2 mm to 6 mm smaller than the length dimension of the body 101, and the width dimension of the spacer 105 may also be 2 mm to 6 mm smaller than the width dimension of the body 101, so that when the battery cover 1 is applied to a battery, the spacer 105 can be prevented from interfering with other internal structures of the battery.

[0059] After understanding the structure of the battery cover plate 1 provided in this embodiment, the assembly process of the battery cover plate 1 is described below. Figure 5a , Figure 5a for Figure 1a When assembling the battery cover 1, the sealing ring 103 can be first placed on the mounting portion 1014 in the corresponding mounting hole 1013; then the pole 102 can be placed on the sealing ring 103; then the insulating ring 104 can be sleeved on the pole 102, and the crimping portion 1015 can be bent toward the pole 102 so that the crimping portion 1015 is buckled on the insulating ring 104, and the pole 102 presses the sealing ring 103 tightly; finally, refer to Figure 5b , Figure 5b for Figure 5a In the side view of the battery cover 1 shown in FIG. 1 , the spacer 105 is fixed to the second surface 1012 of the body 101 .

[0060] The above-mentioned assembly steps of the battery cover 1 are only an exemplary description given in the present application. In some other possible embodiments of the present application, the assembly order of each structure of the battery cover 1 can be adjusted according to the specific situation. For example, the insulating ring 104 can be sleeved on the pole 102, and the insulating ring 104 and the pole 102 can be placed in the mounting hole 1013 as a whole. Figure 5a In the illustrated embodiment, the insulating ring 104 and the pole 102 can be understood as a whole.

[0061] It is understandable that before the sealing ring 103, the pole 102 and the insulating ring 104 are installed in the installation hole 1013 on the body 101, the crimping portion 1015 can be avoided for the installation of the above structure. Figure 5a and Figure 5b , the crimping portion 1015 can be extended from the second surface 1012 to the first surface 1011. The present application does not specifically limit the extension length of the crimping portion 1015, and can be exemplarily greater than or equal to 2 mm and less than or equal to 6 mm, such as 2.5 mm, 3 mm, 4 mm or 5 mm, etc. It can be designed according to the specific dimensions of the structures such as the pole 102 and the insulating ring 104, as long as the crimping portion 1015 can press the pole 102 and the sealing ring 103 while avoiding conductive contact between the crimping portion 1015 and the pole 102.

[0062] In the present application, in order to prevent the crimping portion 1015 from being in conductive contact with the pole 102, the structure of the pole 102 may also be adjusted. Figure 6 , Figure 6 This is a schematic diagram of the structure of a pole 102 provided in another embodiment of the present application. In this embodiment, the edge of the second section 1022 of the pole 102 has an inclined surface 10222, and the inclined surface 10222 is inclined from the bearing surface 10221 to the direction away from the first section 1021. Figure 7 , Figure 7 This is a schematic diagram of the structure of a battery cover 1 provided in another embodiment of the present application. In this embodiment, at least a portion of the insulating ring 104 can be sleeved on the inclined surface 10222, and the crimping portion 1015 can be buckled on the portion of the insulating ring 104 corresponding to the inclined surface 10222. In this way, while the crimping portion 1015 can apply a more reliable buckling force to the pole 102, the length of the crimping portion 1015 can be designed to be smaller, so as to effectively avoid the conductive connection between the crimping portion 1015 and the pole 102, which is beneficial to improving the reliability of the battery cover 1. Other structures of this embodiment can refer to the above Figure 1a and Figure 1b The battery cover 1 shown is configured and will not be described in detail here.

[0063] In addition, please refer to Figure 8 , Figure 8 for Figure 7 , which can be used to illustrate the assembly process of the battery cover 1. In this embodiment, the insulating ring 104 can be sleeved on the pole 102 and then placed in the mounting hole 1013 as a whole. Then, the crimping portion 1015 is bent toward the pole 102, so that the crimping portion 1015 is buckled on the portion of the insulating ring 104 that is arranged opposite to the inclined surface 10222, and the pole 102 presses the sealing ring 103 tightly.

[0064] The battery cover 1 provided in the present application can fix the pole 102 through the crimping portion 1015 which is a part of the main body 101, which can avoid the need to separately provide a fixing member for the connection between the pole 102 and the main body 101, thereby simplifying the structure of the battery cover 1 on the basis of achieving a reliable connection between the pole 102 and the main body 101, which is conducive to reducing the cost of the battery cover 1.

[0065] When the battery cover 1 provided in the above embodiments of the present application is applied to a battery, the battery may also include a battery shell, and the battery cover 1 may be covered on the battery shell, and the battery shell is encapsulated into a sealed structure. It is worth mentioning that the battery cover 1 provided in the present application may be applied to batteries of regular shapes such as square batteries and round batteries, but is not limited thereto, and may also be applied to some possible special-shaped batteries, which are not limited in the present application. In addition, the battery cover 1 may be applied to various types of batteries, and may be applied to lithium-ion batteries, lead-acid batteries, sodium batteries, magnesium batteries, aluminum batteries, and potassium batteries, etc., for example.

[0066] In the battery provided in the present application, since the structure for fixing the pole 102 in the battery cover 1 can be a part of the main body 101 of the battery cover 1, it can be beneficial to reduce the structural parts of the battery cover 1 on the basis of realizing a reliable connection between the pole 102 and the main body 101, thereby simplifying the structure of the battery cover 1, so as to effectively reduce the cost of the battery cover 1, and further achieve the purpose of reducing the cost of the entire battery.

[0067] The battery provided in the above embodiments of the present application can be, but is not limited to, applied to energy storage devices such as electronic devices, electric vehicles or power storage systems. Among them, the electronic device can be, for example, various computers, mobile phones, display screens and other devices that use batteries as driving power sources. Electric vehicles can be, for example, electric cars, electric tricycles, electric bicycles, etc. that use batteries as driving power sources. The power storage system can be, for example, a power storage system that uses batteries as power storage sources.

[0068] The energy storage device may include a receiving cavity, and the battery may be received in the receiving cavity. The energy storage device may be electrically connected to an electrical device to provide electrical energy to the electrical device. Since the cost of the battery of the energy storage device is relatively low, it is beneficial to reduce the cost of the energy storage device.

[0069] In addition, when the above energy storage device is used in various energy storage systems, the energy storage system may also include a power converter. The power converter may be used to perform power conversion processing on voltage and / or current, and input the converted voltage and / or current into the energy storage device, so that the energy storage device can meet the power requirements of the power-consuming device. Since the cost of the energy storage device in the energy storage system is relatively low, it can help reduce the cost of the energy storage system.

[0070] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A battery, characterized in that: The battery comprises a battery shell and a battery cover, wherein the battery cover is covered on the battery, the battery cover comprises a body, a pole and an insulating ring, and the body comprises a first surface and a second surface which are arranged opposite to each other; The main body has a mounting hole and a crimping portion. Along the direction from the first surface to the second surface, the mounting hole passes through the main body. The pole is installed in the mounting hole. The insulating ring is sleeved on the circumferential periphery of the pole. The first surface is provided with a crimping portion, and the crimping portion is buckled on the insulating ring.

2. The battery according to claim 1, characterized in that In the direction from the first surface to the second surface, the pole includes a first section and a second section connected to each other, the cross-sectional area of ​​the first section is smaller than the cross-sectional area of ​​the second section, and the second section has a bearing surface arranged in an extending direction of the first section; At least a portion of the insulating ring overlaps the bearing surface, and the crimping portion is pressed on the portion of the insulating ring overlapping the bearing surface.

3. The battery according to claim 1 or 2, characterized in that: The battery cover plate includes a sealing ring, the mounting hole is provided with a mounting portion, and the sealing ring is located between the mounting portion and the pole.

4. The battery according to claim 2, characterized in that The insulating ring is sleeved on at least a portion of the first section.

5. The battery according to any one of claims 1 to 4, characterized in that: The crimping portion and the body are an integrally formed structure.

6. The battery according to claim 2 or 4, characterized in that: The crimping portion is bent toward the pole, and at least a portion of the projection of the crimping portion along the body overlaps with at least a portion of the projection of the second section on the body.

7. The battery according to any one of claims 1 to 6, characterized in that: The crimping portion includes a plurality of straight segments arranged around the pole, and the plurality of straight segments are respectively buckled and pressed against the pole.

8. The battery according to claim 2, 4 or 6, characterized in that: An inclined surface is provided at the edge of the second section, and the inclined surface is inclined from the bearing surface in a direction away from the first section; At least a portion of the insulating ring is sleeved on the inclined surface, and the crimping portion is buckled on a portion of the insulating ring that is arranged corresponding to the inclined surface.

9. The battery according to any one of claims 1 to 8, characterized in that: The thickness of the crimping portion is greater than or equal to 0.5 mm and less than or equal to 4 mm.

10. The battery according to claim 3, characterized in that Along a direction from the first surface to the second surface, a thickness of the mounting portion is greater than or equal to 30% of a total thickness of the body and less than or equal to 70% of a total thickness of the body.

11. The battery according to any one of claims 1 to 10, characterized in that: The thickness of the insulating ring is greater than or equal to 0.3 mm and less than or equal to 3 mm.

12. The battery according to claim 3, characterized in that The compression amount of the sealing ring is greater than or equal to 10% and less than or equal to 50%.

13. The battery according to any one of claims 1 to 12, characterized in that: The battery cover plate further comprises a spacer, which is arranged on the second surface of the body and has a avoidance hole arranged corresponding to the mounting hole; Along the direction from the first surface to the second surface, the thickness of the spacer is greater than or equal to 2 mm and less than or equal to 10 mm.

14. An energy storage device, characterized in that: It comprises a containing cavity and a battery as described in any one of claims 1 to 13, wherein the battery is accommodated in the containing cavity.

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