Storage battery

Abstract

The utility model discloses a storage battery, which comprises a battery jar, a plurality of chambers for accommodating plate groups are arranged in the battery jar, a group of plate groups with positive and negative electrodes connected in series is accommodated in each chamber, and the positive and negative electrodes of the plate group in each chamber are placed in the same direction; the battery jar is used for containing a plurality of polar groups, the busbar is used for connecting the polar lugs of each group of polar groups according to positive electrodes or negative electrodes and connecting the adjacent polar groups according to the arrangement sequence of the polar groups in the battery, and the battery cover covers the battery jar and the busbar. When the storage battery provided by the embodiment of the utility model is assembled, the positive and negative poles of all the pole groups in the battery jar are placed in the same direction, so that the wrong placement of the pole groups when the pole groups are assembled into the battery jar can be effectively avoided, the reject ratio of products is reduced, and the assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery, especially a battery. BACKGROUND

[0002] Lead-acid batteries are widely used in many fields, especially in the power supply of electric vehicles. A lead-acid battery mainly consists of a group of poles, electrolyte, a battery shell and terminals. Among them, the group of poles includes positive plates (grid coated with lead dioxide), negative plates (grid filled with sponge lead) and separators. During assembly, the positive and negative plates and the separators are sequentially stacked, pressed and fixed together in the order of positive plate-separator-negative plate to form a group of pole units (referred to as group of poles), then the assembled group of poles is carefully loaded into the battery tank according to the corresponding order, and the positive and negative lead wires are connected to the battery terminals through the bus bar, finally the appropriate amount of electrolyte is injected, and the battery shell is sealed to ensure that the internal environment of the battery is not contaminated by the outside world. The six single cells of the commonly used lead-acid battery for electric bicycles are arranged in a straight line, and the arrangement order of the group of poles in the six single cells is relatively complex, which is prone to errors during assembly and is difficult to check visually, often resulting in high defective rate of the final battery and low production efficiency. SUMMARY

[0003] The technical problem to be solved by the embodiments of the utility model lies in providing a battery that can facilitate the assembly of the group of poles and reduce the defective rate.

[0004] To solve the above technical problems, the utility model provides a battery, which comprises: a battery tank, a plurality of cavities for accommodating a group of poles are arranged in the battery tank, each cavity accommodates a group of poles with positive and negative poles connected in series, wherein the positive and negative poles of the group of poles in each cavity are arranged in the same direction; a bus bar for connecting the tabs of each group of poles according to the positive or negative poles, and connecting the adjacent groups of poles according to their arrangement order in the battery; and a battery cover covering the battery tank and the bus bar.

[0005] In a feasible implementation, the battery tank comprises six cavities, the six cavities are arranged in two parallel rows, each row has three cavities arranged along a first direction, the length direction of the cavities is arranged along the first direction, the width direction of the cavities is arranged along a second direction, and the depth direction of the cavities is arranged along a third direction, the first direction, the second direction and the third direction are perpendicular to each other.

[0006] In a feasible implementation, the busbar includes two first sub-busbars, four second sub-busbars and a third sub-busbar, wherein each of the first sub-busbars is linearly arranged in parallel to the second direction and is arranged at two ends of the electromagnetic slot along the first direction, one for connecting negative poles of the pole groups and the other for connecting positive poles of the pole groups; each of the second sub-busbars includes a first part, a second part and a third part which are linearly arranged and connected in sequence in a Z shape, wherein the first part and the second part are used for connecting positive poles and negative poles of two pole groups arranged in a diagonal manner, and the third part is used for connecting the first part and the second part in a head-to-tail manner; and the third sub-busbar is arranged in an H shape and is used for connecting positive poles and negative poles of two pole groups arranged adjacent to each other along the first direction.

[0007] In a feasible implementation, the outer wall of the battery slot further includes a heat dissipation plate which is integrally formed with the outer wall.

[0008] In a feasible implementation, the material of the outer wall of the battery slot is ABS.

[0009] In a feasible implementation, the material of the heat dissipation plate is an aluminum plate.

[0010] In a feasible implementation, the outer surface of the heat dissipation plate has a wave-shaped protrusion.

[0011] In a feasible implementation, the width of each of the cavities is slightly greater than the thickness of the pole group.

[0012] In a feasible implementation, the battery cover has a first recess structure which matches the busbar structure, the first recess structure is recessed in a direction away from the battery slot along the third direction, and the first recess structure is used for accommodating the busbar.

[0013] In a feasible implementation, the battery cover has a second recess structure which matches the busbar structure, the second recess structure is arranged above the first recess structure, and the second recess structure is recessed in a direction close to the battery slot along the third direction.

[0014] The utility model is implemented, and has the following beneficial effects:

[0015] When the storage battery is assembled, the positive and negative poles of all the pole groups in the battery slot are arranged in the same direction, which can effectively avoid placement errors when the pole groups are assembled into the battery slot, reduce product failure rate and improve assembly efficiency.

[0016] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not limiting to the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0018] Figure 1 is a schematic diagram of the overall structure of the battery shown in some embodiments of the present application;

[0019] Figure 2 yes Figure 1 An exploded view of the battery shown;

[0020] Figure 3 yes Figure 1 A schematic diagram of the battery cover of the battery shown in another angle;

[0021] Figure 4 yes Figure 1 Schematic diagram of the battery pole group and busbar shown;

[0022] Figure 5 yes Figure 4 A simplified schematic diagram of the battery busbar is shown;

[0023] Figure 6 This is a simplified schematic diagram of the busbar of an existing "I" type battery;

[0024] Figure 7 is a simplified schematic diagram of a battery busbar shown in other embodiments of the present application;

[0025] Figure 8 is a simplified schematic diagram of a battery busbar shown in other embodiments of the present application;

[0026] Figure 9 It is a schematic diagram of the outer wall of the battery container of the battery shown in other embodiments of the present application.

[0027] Reference numerals in the figures:

[0028] 100-battery;

[0029] 110-battery slot, 111-chamber, 112-outer wall, 113-heat sink

[0030] 120-bus, 121-first sub-bus, 122-second sub-bus, 123-third sub-bus, 124-output

[0031] 130-battery cover, 131-first groove, 132-second groove,

[0032] 140-extreme group,

[0033] X - first direction, Y - second direction. DETAILED DESCRIPTION

[0034] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details, and that the present application is not limited to the specific embodiments described below.

[0035] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by the upper, lower, front, rear, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0037] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0038] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] Please refer to Figures 1 to 5The application provides a storage battery 100. The storage battery 100 comprises a battery groove 110 for accommodating a battery pole group 140, a busbar 120 and a battery cover 130. The battery groove 110 is internally provided with a plurality of cavities 111 for accommodating the pole group 140. Each cavity 111 accommodates a group of pole groups 140 with positive and negative poles in series. The positive and negative poles of the pole group 140 in each cavity 111 are arranged in the same direction. The busbar 120 is used for connecting the pole lug of each group of pole groups 140 according to the positive or negative pole, and connecting adjacent pole groups 140 according to the arrangement order of the pole groups 140 in the battery. The battery cover 130 covers the battery groove 110 and the busbar 120.

[0040] In the storage battery 100, the positive and negative poles of all the pole groups 140 in the battery groove 110 are arranged in the same direction, which can effectively avoid the placement error of the pole group 140 when assembled into the battery groove 110, reduce the product failure rate and improve the assembly efficiency. The positive and negative poles of the pole group 140 arranged in the same direction are different from the existing placement mode of the positive and negative poles of the pole group 140, and the positive and negative poles of the pole group 140 in all the cavities 111 of the battery groove 110 are the same. In other words, the pole group 140 in the battery groove 110 is placed in each cavity 111 in a translational mode without rotation or inversion. In this way, the pole group 140 can be placed in the same posture by manual or mechanical equipment during the assembly of the storage battery 100 and then transferred to the cavity 111, without the need of judging the placement order or position of the pole group 140 according to the cavity 111 or position recognition, which significantly simplifies the assembly steps, saves the assembly time, reduces the product failure rate and improves the assembly efficiency.

[0041] In an embodiment, the battery tank 110 of the storage battery 100 comprises six chambers 111. The six chambers 111 are arranged in two parallel rows, each row comprising three chambers 111 arranged along a first direction X. The length direction of the chambers 111 is arranged along the first direction X, the width direction of the chambers 111 is arranged along a second direction Y, and the depth direction of the chambers 111 is arranged along a third direction. The first direction X, the second direction Y, and the third direction are perpendicular to each other. In other words, the six chambers 111 are arranged in a 2*3 manner. In addition, two adjacent chambers 111 along the first direction X are adjacent along the short side, and two adjacent chambers 111 along the second direction Y are adjacent along the long side. The arrangement of the six chambers 111 has the following advantages. First, the existing six chambers 111 of the storage battery 100 are arranged in a row along the first direction X with the long sides of the chambers 111 adjacent to each other, and the length-width ratio of each chamber 111 is about 1:2. The arrangement of the six chambers 111 according to the present application does not change the overall size of the existing battery tank 110, which reduces the cost of changing the production line or mold, and also avoids the need to adjust the size of other corresponding facilities and equipment, thereby reducing costs and energy consumption. Second, the arrangement of the six chambers 111 according to the present application does not change the position of the output end of the battery, that is, the positive and negative ports of the output end 124 are consistent with the ports of the output end of the existing battery (the arrangement of the busbar 120 is as shown in Figure 6 Fig. 2), which is convenient for users. Third, the arrangement of the six chambers 111 according to the present application also allows the long side of the pole group 140 in each chamber 111 to face outward, that is, the board surface of all the pole groups 140 faces outward. In the existing “I”-shaped arrangement of the battery (the arrangement of the busbar 120 is as shown in Figure 6 Fig. 2), if the voltage reaches 6V or higher, the edge of the battery has good heat dissipation, but the pole group 140 in the middle part cannot be cooled well, which causes heat accumulation and temperature rise, resulting in voltage rise, rapid battery water loss, and shortened battery cycle life. The arrangement of the six chambers 111 according to the present application allows the heat dissipation surface of the pole group 140 in each chamber 111 to be uniform, which balances the temperature of each single battery and improves the stability of the storage battery 100 during operation and the service life of the battery.

[0042] In an embodiment, the six chambers 111 can also be arranged in an “I” shape (not shown), and the batteries in the six chambers 111 are also arranged in the same layout, that is, arranged in a line, which has the advantage of avoiding assembly errors, but mayFigure 7 The battery slot 110 is arranged in the manner shown.

[0043] In a feasible implementation, the busbar 120 includes two first sub-busbars 121, four second sub-busbars 122, and one third sub-busbar 123. Each of the first sub-busbars 121 is linearly arranged parallel to the second direction Y and is arranged at two ends of the electromagnetic slot along the first direction X, one for connecting the negative poles of the pole groups 140 and the other for connecting the positive poles of the pole groups 140. Each of the second sub-busbars 122 includes a first part, a second part, and a third part arranged linearly, and the first part, the second part, and the third part are connected in a Z shape in sequence, wherein the first part and the second part are used to connect the positive and negative poles of two pole groups 140 arranged diagonally, and the third part is used to connect the first part and the second part end to end. The third sub-busbar 123 is arranged in an H shape and is used to connect the positive and negative poles of two pole groups 140 arranged adjacent to each other along the first direction X. The pole groups 140 of the battery can be arranged in a consistent manner through the structure of the busbar 120. The positive and negative pole ears are designed on the same vertical line, which can quickly identify whether the battery is reversed during the manufacturing process, thereby reducing the battery failure rate. At the same time, the position of the output terminal 124 of the battery remains unchanged, which is beneficial to the use of the user side.

[0044] In a feasible implementation, the busbar 120 can also be connected in the manner shown as Figure 8 Such a busbar 120 can also achieve consistent arrangement of the pole groups 140 and distribution of the six chambers 111 in a 2*3 arrangement.

[0045] In a feasible implementation, the outer wall 112 of the battery slot 110 includes a heat sink 113 that is integrally formed with the outer wall 112. Integrating the heat sink 113 with the outer wall 112 of the battery slot 110 can effectively improve the heat dissipation efficiency of the battery system. This means that the heat generated by the battery during operation can be more quickly conducted to the external environment, thereby helping to maintain the battery within a more ideal temperature range. The integrally formed design is generally more robust than using multiple components that are welded or bonded. Such a design reduces the number of connection points, thereby reducing the risk of structural failure due to loosening or failure of the connection. Integrally forming reduces the steps in the assembly process, simplifies the manufacturing process, and also reduces potential assembly errors. This not only improves production efficiency but also reduces production costs. The integrally formed design can provide better sealing effects, helping to prevent external moisture, dust, and other pollutants from entering the battery interior, while also better protecting the chemicals inside the battery from leaking out, increasing the safety of the battery.

[0046] Further, the preparation process of the outer wall 112 of the battery tank 110 and the heat dissipation plate 113 can be: the main material of the outer wall 112 of the battery tank 110 is ABS, and the heat dissipation plate 113 is embedded in the position of the shaping mold corresponding to the outer wall 112 of the battery tank 110 when the ABS is shaped. Then the heat dissipation plate 113 can be completely embedded on the outer wall 112 of the battery tank 110, which on the one hand reduces the assembly steps, simplifies the manufacturing process, saves the preparation cost, and on the other hand makes the heat dissipation plate 113 more fit the inner wall of the cavity 111 (not fit on the outside of the outer wall 112), improves the heat dissipation effect. In addition, the process of one-piece forming can also make the heat dissipation plate 113 be well covered by the outer wall 112 of the battery tank 110, improve the stability and reliability of the overall structure of the storage battery 100.

[0047] In a feasible implementation, the material of the heat dissipation plate 113 can be an aluminum plate. Aluminum is an excellent heat-conducting material with good heat-conducting performance; it is relatively cheap and easy to process into various shapes; it is relatively light and suitable for making large heat sinks; it has strong corrosion resistance. The material of the heat dissipation plate 113 can also be copper. Copper has a high thermal conductivity, which can provide better heat transfer performance; it still maintains good thermal conductivity at high temperatures. The material of the heat dissipation plate 113 can also be copper-aluminum alloy. Copper-aluminum alloy combines the advantages of copper and aluminum, has certain heat-conducting performance, is lighter than pure copper, and has relatively low cost. The material of the heat dissipation plate 113 can also be a heat pipe. The heat pipe is a high-efficiency heat transfer element that quickly transfers heat through the evaporation and condensation cycle of the internal working medium, which is very suitable for heat dissipation of high-power devices. The material of the heat dissipation plate 113 can also be graphene. Graphene has ultra-high thermal conductivity and can effectively transfer heat; it is light and flexible, and is suitable for flexible electronic devices. The material of the heat dissipation plate 113 can also be a ceramic material. Certain ceramic materials (such as aluminum oxide Al2O3 and aluminum nitride AlN) have good insulation performance and are suitable for applications that require electrical isolation; they are resistant to high temperatures. The material of the heat dissipation plate 113 can also be other composite materials. By compounding different materials, materials with high thermal conductivity and light weight can be obtained.

[0048] In an embodiment, the outer wall 112 of the battery tank 110 is made of ABS, and the heat dissipation plate 113 is made of aluminum plate. ABS (acrylonitrile butadiene styrene copolymer) has the following advantages: good mechanical properties: ABS has high tensile strength and bending strength, and is suitable for making parts that need to bear certain stress. ABS material has good impact resistance and is not easy to break, especially in low temperature environment it still maintains toughness. Easy to process: ABS material can be processed by injection molding, extrusion, blow molding and other ways, with short molding cycle and high efficiency. Strong plasticity: ABS material is easy to dye and surface treatment, such as electroplating, printing, spraying, etc., which can meet the diversified design requirements. Corrosion resistance: ABS has good resistance to most acids, bases, salts and oils, and is not easy to be corroded. Anti-aging: adding appropriate anti-aging agent can improve its weather resistance. Temperature resistance: ABS material can maintain its physical properties in a wide temperature range, suitable for various environments from freezing to hot water. Good electrical insulation: ABS has good electrical insulation, suitable for manufacturing electrical shell, electronic parts, etc. Recyclable: ABS material can be recycled and reused, which is beneficial to environmental protection. Economy: the cost of ABS material is relatively low, and the production efficiency is high, suitable for large-scale production. Aluminum is a good heat conducting material, and aluminum material itself is relatively light. Using aluminum plate as heat dissipation material can reduce the overall weight of the battery without affecting the heat dissipation performance. At the same time, the cost of aluminum material is low, and it is easy to process.

[0049] In an embodiment, the battery tank 110 forms the chamber 111 through a partition plate, and the material of the partition plate is the same as that of the outer wall 112.

[0050] In an embodiment, as shown in FIG. 1, the battery tank 110 is provided with a heat dissipation plate 113, and the heat dissipation plate 113 is arranged on the outer wall 112 of the battery tank 110. Figure 9As shown, the outer surface of the heat sink 113 has a wavy protrusion. The wavy protrusion can significantly increase the outer surface area of the heat sink 113. The larger surface area means more space for heat dissipation, thus improving the heat dissipation efficiency. The wavy design can change the airflow path, so that the air generates vortex flow when passing through the fins, helping to enhance the heat exchange efficiency between the air and the fins. This design helps to form better natural convection or forced convection conditions. The wavy protrusion can also enhance the structural rigidity of the heat sink 113, making it less likely to deform when subjected to external pressure or impact, thus improving the mechanical strength and durability of the heat sink. By designing the wavy protrusion, the thickness or material usage of the aluminum plate can be reduced to some extent, thus reducing the weight of the entire heat dissipation device, while ensuring sufficient heat dissipation effect. The wavy design is sometimes also used to enhance the appearance of the product. The unique design can make the product more attractive, while also reflecting the high-tech feel of the product. The heat dissipation capacity can be further improved by increasing the depth or density of the wavy design. Further, the thickness of the aluminum plate is about 1 / 3 of the thickness of the outer wall 112. The thickness of the outer wall 112 can be 1-20 mm. Aluminum is a good thermal conductor, and using it as a heat dissipation material can effectively conduct the heat generated by the internal components to the external environment. By setting the thickness of the aluminum plate to be 1 / 3 of the thickness of the outer wall, the material usage can be reduced while ensuring sufficient heat conduction capacity, thus reducing costs. By precisely controlling the thickness of the aluminum plate, limited space resources can be better utilized to ensure that there is enough space inside the device to accommodate other important components, while maintaining good heat dissipation performance. The aluminum plate of appropriate thickness not only serves as a heat dissipation element, but also increases the rigidity of the entire shell, improving its resistance to deformation, especially when facing external impact or pressure, helping to protect sensitive internal components from damage. Compared to very thin or very thick plates, an aluminum plate with a thickness of 1 / 3 of the outer wall thickness is easier to cut, bend, and process, which helps to improve production efficiency and reduce manufacturing difficulty. Selecting the appropriate thickness of the aluminum plate can meet the heat dissipation requirements while avoiding the increase in costs caused by the use of too thick materials. This is of great significance for controlling the overall cost of the product and improving market competitiveness.

[0051] In an embodiment, the width of each of the chambers 111 is slightly larger than the thickness of the pole group 140. Specifically, the pole group thickness is compressed by about 15-20% before entering the slot, and the pole group is in a tightly assembled state after entering the battery slot. In this way, on the one hand, the outermost panel of the pole group 140 can be as close as possible to the inner wall of the chamber 111, i.e. to the outer wall 112 of the battery slot 110 and the heat dissipation plate 113, so as to improve the heat dissipation effect and efficiency, thereby improving the environmental stability of the battery during use, improving the stability of the battery during use, and improving the service life of the battery. On the other hand, the pole group 140 can also be assembled more stably in the chamber 111 to avoid shaking and improve the overall stability of the battery.

[0052] In an embodiment, the battery cover 130 has a first groove 131 structure matching the structure of the busbar 120, the first groove 131 structure is recessed in the third direction away from the battery slot 110, and the first groove 131 structure is used to accommodate the busbar 120. In this way, the corresponding position of the busbar 120 can be isolated from other areas in the chamber 111, facilitating sealing.

[0053] In an embodiment, the battery cover 130 has a second groove 132 structure matching the structure of the busbar 120, the second groove 132 structure is arranged above the first groove 131 structure, and the second groove 132 structure is recessed in the third direction towards the battery slot 110. In this way, the use of sealing glue for the busbar 120 can be saved, and the air pressure of each chamber 111 of the storage battery 100 can be increased as much as possible.

[0054] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered as within the scope of the present disclosure.

[0055] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be construed as limiting the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A battery, characterized by The battery comprises: a battery tank, wherein a plurality of chambers for accommodating a group of poles are arranged in the battery tank, each of the chambers contains a group of poles with positive and negative poles in series, wherein the positive and negative poles of the group of poles in each chamber are arranged in the same direction; bus bars for connecting the tabs of each group of poles according to positive or negative poles, and connecting adjacent poles according to the arrangement order of the group of poles in the battery, a battery cover covering the battery tank and the bus bars.

2. The battery of claim 1, wherein The battery tank comprises six chambers arranged in two parallel rows, each row has three chambers arranged along a first direction, the length direction of the chambers is arranged along the first direction, the width direction of the chambers is arranged along a second direction, and the depth direction of the chambers is arranged along a third direction, the first direction, the second direction and the third direction are perpendicular to each other.

3. The battery of claim 2, wherein The bus bars comprise two first sub-bus bars, four second sub-bus bars and one third sub-bus bar, wherein, each of the first sub-bus bars is linearly arranged parallel to the second direction and is arranged at two ends of the battery tank along the first direction, one is used for connecting the negative poles of the group of poles, and the other is used for connecting the positive poles of the group of poles; each of the second sub-bus bars comprises a first part, a second part and a third part arranged linearly, the first part, the second part and the third part are connected in Z shape in turn, wherein the first part and the second part are used for connecting the positive and negative poles of two group of poles arranged diagonally, and the third part is used for connecting the first part and the second part end to end; The third sub-bus bar is arranged in H shape, and is used for connecting the positive and negative poles of two group of poles arranged adjacent along the first direction.

4. The battery of claim 1, wherein The outer wall of the battery tank further comprises a heat dissipation plate which is integrally formed with the outer wall.

5. The battery of claim 4, wherein The material of the outer wall of the battery tank is ABS.

6. The battery of claim 4, wherein The material of the heat dissipation plate is aluminum plate.

7. The battery of claim 5, wherein The outer surface of the heat dissipation plate has a wave-shaped protrusion.

8. The battery of claim 1, wherein The width of each chamber is slightly larger than the thickness of the group of poles.

9. The battery of claim 2, wherein The battery cover has a first groove structure matched with the structure of the bus bars, the first groove structure is recessed in the direction away from the battery tank along the third direction, and the first groove structure is used for accommodating the bus bars.

10. The battery of claim 9, wherein The battery cover has a second groove structure matched with the structure of the bus bars, the second groove structure is arranged above the first groove structure, and the second groove structure is recessed in the direction close to the battery tank along the third direction.

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