Electrode structure and battery

Abstract

The utility model provides an electrode structure and a battery, the electrode structure comprises a collector plate, the collector plate is hexagonal, the collector plate is provided with a first surface and a second surface opposite to each other along the thickness direction of the collector plate, the first surface is used for being connected with a tab, the edge of the collector plate is provided with a flange, and the flange constructs a limiting groove on the second surface of the collector plate; and the adapter plate is also hexagonal, the adapter plate is arranged in the limiting groove and is matched with the limiting groove, the turned-over edge wraps the side face of the adapter plate and is welded to the side face of the adapter plate, and a pole is arranged on the surface of the side, away from the collector plate, of the adapter plate. According to the electrode structure, on one hand, the limiting groove is defined by the turned-over edge and the collector plate, the limiting groove is in limiting fit with the adapter plate, and the alignment difficulty during assembly of the collector plate and the adapter plate is reduced; and on the other hand, the collector plate is welded with the side surface of the adapter plate through the turnup, so that the connection difficulty of the adapter plate and the collector plate is reduced, and finally, the assembly difficulty of the electrode structure is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an electrode structure and a battery. Background Art

[0002] Power batteries can be divided into square batteries, cylindrical batteries and soft-pack batteries according to their shapes. The related technology also proposes a hexagonal battery. Compared with cylindrical batteries, hexagonal batteries can provide more space for internal cells, which can not only increase the heat dissipation space of the internal batteries and improve the battery safety performance, but also increase the size of the internal cells and increase the capacity of the battery. However, the hexagonal battery is different from the cylindrical battery. The shell of the hexagonal battery is hexagonal. Correspondingly, the current collector and adapter plate in the electrode structure are also set to a hexagon that matches the shell so that they can be accommodated in the shell. In order to prevent the electrode structure from interfering with the shell, it is necessary to ensure that the current collector and the adapter plate are aligned when assembling the electrode structure, which increases the difficulty of assembling the electrode structure. Utility Model Content

[0003] The embodiments of the present application provide an electrode structure and a battery, which can improve the technical problem of the difficulty in assembling the electrode structure of a hexagonal prism battery.

[0004] In a first aspect, an embodiment of the present application provides an electrode structure, comprising:

[0005] A current collecting plate, the current collecting plate is hexagonal, and has a first surface and a second surface opposite to each other along the thickness direction of the current collecting plate, the first surface is used to connect with the pole ear, and the edge of the current collecting plate is provided with a flange, and the flange forms a limiting groove on the second surface of the current collecting plate;

[0006] The adapter plate is also hexagonal, and is arranged in the limiting groove and matched with the limiting groove. The flange wraps the side of the adapter plate and is welded to the side of the adapter plate. A pole is arranged on the surface of the side of the adapter plate away from the collecting plate.

[0007] In one embodiment, the adapter plate is configured as a step structure, the adapter plate includes a hexagonal first step layer and a second step layer, the first step layer and the second step layer are arranged in sequence along a direction away from the collecting plate, the first step layer has a first side surface, the second step layer has a second side surface, the side surfaces include the first side surface and the second side surface, in the radial direction of the adapter plate, the first side surface is closer to the center of the adapter plate than the second side surface, the first step layer is arranged in the limiting groove, and the flange wraps the first side surface and is welded to the first side surface.

[0008] In one embodiment, the outer surface of the flange is flush with the second side surface; or, in the radial direction of the adapter plate, the outer surface of the flange is closer to the center of the adapter plate than the second side surface; or, the height of the flange is less than or equal to the thickness of the first step layer.

[0009] In one embodiment, along a direction away from the second step layer, the first side surface is inclined toward a direction close to a center line of the adapter plate, and an inner surface of the flange is matched with the first side surface.

[0010] In one embodiment, a boss is protruding from the first surface, and the boss is used to be connected to the tab.

[0011] In one embodiment, a first through hole is provided through the current collecting plate, and the first through hole is spaced apart from the boss; a second through hole is provided through the adapter plate, and the second through hole corresponds to the first through hole.

[0012] In one embodiment, the thickness of the current collecting plate is 0.6 mm to 1.1 mm, and the thickness of the adapter plate is 2 mm to 3 mm.

[0013] In one embodiment, the electrode structure further includes an end cover, which is also hexagonal and has a third through hole. The end cover is sleeved on the pole through the third through hole and is located on a side of the adapter plate away from the current collecting plate.

[0014] In one embodiment, the electrode structure is a cathode structure.

[0015] In a second aspect, an embodiment of the present application provides a battery, comprising a shell, a battery cell and the above-mentioned electrode structure, wherein the battery cell is installed in the shell, and a pole tab is connected to the battery cell, and the pole tab is welded to the first surface of the current collecting plate.

[0016] Beneficial effects of the embodiments of the present application:

[0017] The electrode structure provided in the embodiment of the present application includes a current collecting plate and an adapter plate, which cooperate with each other to improve the mechanical strength of the electrode structure; the current collecting plate is used to connect with the pole ear, and a flange is provided on the current collecting plate, and the adapter plate is connected to the current collecting plate through the flange, and a pole is also provided on the adapter plate, so that a current conduction path is formed between the current collecting plate, the flange, the adapter plate and the pole. Furthermore, the flange and the current collecting plate define a limit groove, and the limit groove cooperates with the adapter plate to reduce the difficulty of aligning the current collecting plate and the adapter plate during assembly; at the same time, the current collecting plate is welded to the side of the adapter plate through the flange, which reduces the difficulty of connecting the adapter plate and the current collecting plate. In summary, the assembly difficulty of the electrode structure is reduced, and the assembly difficulty of the battery is also controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic cross-sectional structural diagram of a battery provided in an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the three-dimensional structure of the electrode structure provided in the embodiment of the present application;

[0021] Figure 3 is an exploded view of an electrode structure provided in an embodiment of the present application;

[0022] Figure 4 is a schematic side view of the electrode structure provided in an embodiment of the present application;

[0023] Figure 5 yes Figure 4 Enlarged view of part A in the middle;

[0024] Figure 6 is a schematic side view of the structure of a current collecting plate in an electrode structure provided in an embodiment of the present application;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the adapter plate in the electrode structure provided in the embodiment of the present application.

[0026] Reference numerals:

[0027] 1. Electrode structure;

[0028] 11. current collecting plate; 111. first surface; 112. second surface; 113. flange; 114. limiting groove; 115. boss; 116. first through hole;

[0029] 12, adapter plate; 121, side surface; 1211, first side surface; 1212, second side surface; 122, pole; 123, first step layer; 124, second step layer; 1241, step surface; 125, second through hole;

[0030] 13. end cover; 131. third through hole;

[0031] 10. Battery;

[0032] 2. Battery cell; 21. Tab;

[0033] 3. Shell. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0035] In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The terms "comprises," "includes," or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0039] In the description of the embodiments of the present application, words such as "example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "example" or "for example" in the embodiments of the present application is not to be interpreted as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0040] Since the current collecting plate and the adapter plate in the electrode structure of the hexagonal battery are both set to be hexagonal, the edges of the current collecting plate and the adapter plate have sharp corners. If there is a slight offset when the current collecting plate and the adapter plate are stacked, it will cause misalignment. Then, the sharp corners of the current collecting plate and the sharp corners of the adapter plate will be misaligned, and the obtained electrode structure will not be a qualified hexagon, and it will be difficult to adapt to the shell of the hexagonal battery.

[0041] To address this problem, the inventor of the present application proposed a new design concept, in which a flange is provided on the edge of the hexagonal current collecting plate, which is equivalent to constructing a hexagonal shallow groove on one side of the current collecting plate. The hexagonal adapter plate is placed in the shallow groove, and the adapter plate is adapted to the shallow groove. The flange serving as the side wall of the shallow groove wraps and limits the side of the adapter plate, so that the sharp corners of the current collecting plate correspond to the sharp corners of the adapter plate. Next, the current collecting plate and the adapter plate can be combined together by simply welding the flange to the side of the adapter plate. The entire assembly process is simple and quick, and the complicated and time-consuming alignment and calibration process is omitted.

[0042] First, see Figures 1 to 7 The embodiment of the present application provides an electrode structure 1. The electrode structure 1 is a component in the battery 10. The electrode structure 1 is used to connect to the tab 21 on the battery cell 2 to achieve circuit conduction. The electrode structure 1 can be a positive electrode structure or a negative electrode structure. When the electrode structure 1 is a positive electrode structure, the electrode structure 1 is connected to the positive tab on the battery cell 2; when the electrode structure 1 is a negative electrode structure, the electrode structure 1 is connected to the negative tab on the battery cell 2.

[0043] Specifically, the electrode structure 1 includes a current collecting plate 11, which is used to connect with the pole ear 21, for example, by welding, so as to realize the transfer of electrons between the current collecting plate 11 and the pole ear 21. Optionally, the current collecting plate 11 is a metal plate, such as a copper plate, an aluminum plate, a steel plate or a titanium plate. The shape of the current collecting plate 11 is hexagonal. To put it more bluntly, the shadow of the current collecting plate 11 is projected along the thickness direction of the current collecting plate 11, and the shadow of the current collecting plate 11 is a hexagon. Optionally, the shape of the current collecting plate 11 is a regular hexagon. When the battery 10 is a hexagonal prism battery, the shape of the current collecting plate 11 is set to be hexagonal in order to adapt to the housing 3 of the battery 10 so that the current collecting plate 11 can be loaded into the housing 3. Along the thickness direction of the current collecting plate 11, the current collecting plate 11 has a first surface 111 and a second surface 112 opposite to each other. Among them, the first surface 111 is used to connect with the pole ear 21, so as to realize the connection between the current collecting plate 11 and the pole ear 21. The edge of the current collecting plate 11 is provided with a flange 113, and the flange 113 extends to one side of the current collecting plate 11, specifically to the side where the second surface 112 of the current collecting plate 11 is located, so that the flange 113 constructs a limiting groove 114 on the second surface 112 of the current collecting plate 11. It can be understood that the current collecting plate 11 is hexagonal, and the limiting groove 114 defined by the flange 113 provided on the edge of the current collecting plate 11 should also be a hexagonal groove. As an example, when making the current collecting plate 11, the flange 113 can be integrally formed on the current collecting plate 11 by stamping the metal plate. It should be noted here that the flange 113 can be composed of a circle of continuous side walls, or it can be composed of several sections of separated and discontinuous side walls. Similarly, the limiting groove 114 is a structure constructed by the collecting plate 11 and the flange 113 that can accommodate or load other components. The side wall of the limiting groove 114 is not required to be a continuous side wall, as long as the limiting groove 114 can limit the loaded components.

[0044] Since the current collector 11 needs to be connected to the pole lug 21, especially when the current collector 11 is welded to the pole lug 21, the first surface 111 of the current collector 11 is close to the pole lug 21, and then the pole lug 21 is welded to the first surface 111 by welding (for example, laser welding) from the second surface 112 of the current collector 11. Generally, the thickness of the current collector 11 should not be too thick, because if the current collector 11 is too thick, the welding power must be very large to penetrate the current collector 11. However, the pole lug 21 is mainly made of metal foil, and excessive welding power is easy to cause the pole lug 21 to burn through, which ultimately affects the connection between the current collector 11 and the pole lug 21. The specific thickness of the current collector 11 can be determined according to the pole lug 21 matched therewith. Optionally, the thickness of the current collector 11 is 0.6mm to 1.1mm, for example, it can be 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm or 1.1mm.

[0045] When the thickness of the current collecting plate 11 is small, the current collecting plate 11 is relatively easy to deform. In order to enhance the strength of the electrode structure 1, the electrode structure 1 further includes an adapter plate 12. Like the current collecting plate 11, the adapter plate 12 is also configured as a hexagon. The adapter plate 12 has a side 121, where the side 121 refers to the surface surrounding the peripheral side of the adapter plate 12. If the adapter plate 12 is configured as a hexagon, the adapter plate 12 has six side surfaces 121. In detail, the adapter plate 12 is disposed in the limiting groove 114, and the adapter plate 12 is adapted to the limiting groove 114. In this way, when the adapter plate 12 is loaded in the limiting groove 114, the adapter plate 12 is limited and matched with the limiting groove 114, so that the adapter plate 12 and the current collecting plate 11 are automatically aligned, and the adapter plate 12 is also limited in freedom by the limiting groove 114 and cannot move arbitrarily. Next, it is only necessary to weld the adapter plate 12 to the current collecting plate 11. Specifically, the flange 113 of the current collecting plate 11 is welded to the side 121 of the adapter plate 12. This welding method can greatly reduce the difficulty of welding the adapter plate 12 to the current collecting plate 11. At the same time, the adapter plate 12 and the current collecting plate 11 can also transmit electrons through the flange 113 to meet the needs of conductivity. In other words, the flange 113 of the final electrode structure 1 (which serves as the side wall of the limiting groove 114) wraps the side 121 of the adapter plate 12, that is, the flange 113 contacts the side 121 of the adapter plate 12, and the flange 113 is welded to the side 121 of the adapter plate 12. Here, the adapter plate 12 is set in the limiting groove 114, and the adapter plate 12 can be completely accommodated in the limiting groove 114, or the adapter plate 12 can be partially accommodated in the limiting groove 114.

[0046] In addition, a pole 122 is also provided on one side surface of the adapter plate 12, and specifically, the pole 122 is provided on the side surface of the adapter plate 12 away from / away from the current collecting plate 11. The pole 122 is used to connect to an external circuit to introduce or extract current relative to the battery cell 2. Here, the pole 122 and the adapter plate 12 can be threaded, welded, or integrally formed.

[0047] The electrode structure 1 provided in the embodiment of the present application includes a current collecting plate 11 and an adapter plate 12, which cooperate with each other to improve the mechanical strength of the electrode structure 1; the current collecting plate 11 is used to connect with the pole ear 21, and a flange 113 is provided on the current collecting plate 11, and the adapter plate 12 is connected to the current collecting plate 11 through the flange 113, and a pole 122 is also provided on the adapter plate 12, so that a current conduction path is formed between the current collecting plate 11, the flange 113, the adapter plate 12 and the pole 122. Further, the flange 113 and the current collecting plate 11 define a limiting groove 114, and the limiting groove 114 cooperates with the adapter plate 12 to reduce the difficulty of aligning the current collecting plate 11 and the adapter plate 12 during assembly; at the same time, the current collecting plate 11 is welded to the side 121 of the adapter plate 12 through the flange 113, which reduces the difficulty of connecting the adapter plate 12 with the current collecting plate 11. In summary, the assembly difficulty of the electrode structure 1 is reduced.

[0048] In some embodiments, see Figure 4 and Figure 5, the adapter plate 12 is set as a step structure. In detail, the adapter plate 12 includes a first step layer 123 and a second step layer 124, and the two are arranged as one body. The first step layer 123 and the second step layer 124 are both set as hexagons. Usually, the sharp corners of the first step layer 123 correspond to the sharp corners of the second step layer 124. Specifically, the first step layer 123 has a first side 1211. The first side 1211 refers to the surface surrounding the first step layer 123. The number of first side 1211 is also six. The first step layer 123 is a part of the adapter plate 12, and the side of the first step layer 123 is of course the side of the adapter plate 12, that is, the side 121 includes the first side 1211. The second step layer 124 has a second side 1212. The second side 1212 refers to the surface surrounding the second step layer 124. The number of second side 1212 is also six. The second step layer 124 is a part of the adapter plate 12, and the side of the second step layer 124 is of course the side of the adapter plate 12, that is, the side 121 also includes the second side 1212. In the radial direction of the adapter plate 12, the first side 1211 is closer to the center of the adapter plate 12 than the second side 1212. In other words, the radial dimension of the first step layer 123 is smaller than the radial dimension of the second step layer 124, the first step layer 123 is formed as the smaller end of the adapter plate 12, and the second step layer 124 is formed as the larger end of the adapter plate 12. In terms of orientation, the first step layer 123 and the second step layer 124 are arranged in sequence in a direction away from the current collecting plate 11. In other words, the first step layer 123 is closer to the current collecting plate 11 than the second step layer 124, so that the first step layer 123 is used to be set in the limiting groove 114. When the first step layer 123 is arranged in the limiting groove 114, the flange 113 wraps the first side surface 1211, and the flange 113 is welded to the first side surface 1211. Optionally, the outer surface of the flange 113 is flush with the second side surface 1212, or, in the radial direction, the outer surface of the flange 113 is closer to the center of the adapter plate 12 than the second side surface 1212. Here, the outer surface of the flange 113 refers to the side surface of the flange 113 that is away from the limiting groove 114, and the inner surface of the flange 113 is opposite to the outer surface of the flange 113, and the inner surface of the flange 113 is located in the limiting groove 114.

[0049] By setting the adapter plate 12 to a step structure including a first step layer 123 and a second step layer 124, the first step layer 123 serves as the smaller end of the adapter plate 12, and the flange 113 wraps the first side surface 1211 of the first step layer 123 and is welded to the first side surface 1211. This setting effectively alleviates the problem of increased radial size of the electrode structure 1.

[0050] In some embodiments, see Figure 4 and Figure 5, the height of the flange 113 is less than or equal to the thickness of the first step layer 123. Usually, the top surface of the second step layer 124 is formed as a step surface 1241. In the direction away from the current collecting plate 11, the first side surface 1211, the step surface 1241 and the second side surface 1212 are sequentially arranged, and the step surface 1241 is connected between the first side surface 1211 and the second side surface 1212. When the flange 113 is wrapped on the first side surface 1211, the top of the flange 113 is opposite to the step surface 1241. If the height of the flange 113 is equal to the thickness of the first step layer 123, the top of the flange 113 is just in contact with the step surface 1241; if the height of the flange 113 is less than the thickness of the first step layer 123, there is a gap between the top of the flange 113 and the step surface 1241. In the above two cases, the top surface of the first step layer 123 can be released from the second surface 112 of the current collecting plate 11, thereby increasing the contact area between the adapter plate 12 and the current collecting plate 11, which is beneficial to the transmission of current.

[0051] In some embodiments, along the direction away from the second step layer 124, the first side surface 1211 is inclined toward the direction close to the center line of the adapter plate 12, that is, the first side surface 1211 is an inclined surface, and the inner surface of the flange 113 is adapted to the first side surface 1211, that is, the inner surface of the flange 113 is also an inclined surface, and matches the first side surface 1211. The advantage of such a setting is that the inclined surface can play a guiding role, guiding the first step layer 123 to enter the limiting groove 114, and the inner surface of the flange 113 matches the first side surface 1211, and can maintain a sufficient contact surface to ensure the effect of current transmission.

[0052] In some embodiments, the thickness of the adapter plate 12 is 2 mm to 3 mm. The strength of the adapter plate 12 is related to the thickness. While ensuring that the adapter plate 12 has sufficient strength, the adapter plate 12 should be prevented from being too thick, which may result in a low volume energy density or mass energy density of the battery 10. As an example, the thickness of the adapter plate 12 is 2.0 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 3.0 mm. By setting the thickness of the current collecting plate 11 to 0.6 mm to 1.1 mm and the thickness of the adapter plate 12 to 2 mm to 3 mm, the electrode structure 1 assembled by the two can have sufficient mechanical strength.

[0053] In some embodiments, see Figure 2 and Figure 3, a boss 115 is integrally provided on the current collecting plate 11. In detail, the boss 115 is convexly provided on the first surface 111. The boss 115 is used to connect with the pole lug 21, so as to realize the connection between the current collecting plate 11 and the pole lug 21. As an example, the boss 115 can be obtained by stamping the current collecting plate 11. At this time, the thickness of the current collecting plate 11 can be set to 0.6mm~1.1mm. Within this range, the strength of the current collecting plate 11 can be effectively guaranteed and the difficulty of stamping the current collecting plate 11 can be reduced. The number of bosses 115 can be one or more. As an example, the boss 115 is strip-shaped and the number is multiple. The multiple bosses 115 extend radially outward from the center of the current collecting plate 11 along the radial direction of the current collecting plate 11. The pole lug 21 is evenly welded to the current collecting plate 11, thereby improving the welding strength and increasing the current flow capacity.

[0054] In some embodiments, see Figure 2 and Figure 3 , the current collecting plate 11 is penetrated by a first through hole 116, and the first through hole 116 is spaced from the boss 115 to avoid the boss 115. The adapter plate 12 is penetrated by a second through hole 125, and the second through hole 125 corresponds to the first through hole 116. The first through hole 116 and the second through hole 125 can be used as liquid guide holes, and can also be used as heat conduction holes. When the first through hole 116 and the second through hole 125 are used as liquid guide holes, electrolyte can penetrate, and the electrolyte penetrates into the battery cell 2 through the second through hole 125 and the first through hole 116. When the first through hole 116 and the second through hole 125 are used as heat conduction holes, the heat of the battery cell 2 can be transferred to the shell 3 through the first through hole 116 and the second through hole 125, thereby improving the heat dissipation effect. The number of the first through hole 116 can be one or more, and the number of the second through hole 125 can be one or more.

[0055] In some embodiments, see Figure 3 The electrode structure 1 also includes an end cap 13, which is mainly used to connect with the shell 3 of the battery 10 to encapsulate the battery cell 2, the current collector 11 and the adapter plate 12 in the shell 3. In order to adapt to the shell 3, the end cap 13 is also designed to be hexagonal. A third through hole 131 is also provided on the end cap 13, and the third through hole 131 serves as an avoidance hole to ensure that the pole 122 partially passes through the end cap 13 and extends to the outside of the battery 10. Specifically, when assembling the electrode structure 1, the end cap 13 is used to be sleeved on the pole 122 through the third through hole 131, and the end cap 13 is located on the side of the adapter plate 12 away from the current collector 11.

[0056] When assembling the battery 10, taking laser welding as an example, firstly, the pole ear 21 of the battery cell 2 is welded to the current collecting plate 11, and then the current collecting plate 11 is welded to the adapter plate 12, and the assembled structure is loaded into the shell 3, and then the end cover 13 is put on the pole 122 and the end cover 13 is welded to the shell 3.

[0057] Second, see Figure 1 The embodiment of the present application further provides a battery 10, which is a hexagonal prism battery, comprising the electrode structure 1, a battery cell 2 and a housing 3, wherein the battery cell 2 is installed in the housing 3, and a tab 21 is connected to the battery cell 2, and the tab 21 is welded to the first surface 111 of the current collecting plate 11. Optionally, the battery 10 is a lithium-ion battery.

[0058] The battery 10 provided in the embodiment of the present application adopts the above-mentioned electrode structure 1, and the overall assembly difficulty of the battery 10 can be controlled.

[0059] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An electrode structure, characterized in that: include: A current collecting plate, the current collecting plate is hexagonal, and has a first surface and a second surface opposite to each other along the thickness direction of the current collecting plate, the first surface is used to connect with the pole ear, and the edge of the current collecting plate is provided with a flange, and the flange forms a limiting groove on the second surface of the current collecting plate; The adapter plate is also hexagonal, and is arranged in the limiting groove and matched with the limiting groove. The flange wraps the side of the adapter plate and is welded to the side of the adapter plate. A pole is arranged on the surface of the side of the adapter plate away from the collecting plate.

2. The electrode structure according to claim 1, characterized in that: The adapter plate is configured as a step structure, the adapter plate includes a hexagonal first step layer and a second step layer, the first step layer and the second step layer are sequentially arranged in a direction away from the current collecting plate, the first step layer has a first side surface, the second step layer has a second side surface, the side surfaces include the first side surface and the second side surface, in the radial direction of the adapter plate, the first side surface is closer to the center of the adapter plate than the second side surface, the first step layer is arranged in the limiting groove, and the flange wraps the first side surface and is welded to the first side surface.

3. The electrode structure according to claim 2, characterized in that: The outer surface of the flange is flush with the second side surface; or, in the radial direction of the adapter plate, the outer surface of the flange is closer to the center of the adapter plate than the second side surface; or, the height of the flange is less than or equal to the thickness of the first step layer.

4. The electrode structure according to claim 2, characterized in that: Along the direction away from the second step layer, the first side surface is inclined toward the direction close to the center line of the adapter plate, and the inner surface of the flange is matched with the first side surface.

5. The electrode structure according to any one of claims 1 to 4, characterized in that: A boss is protruding from the first surface, and the boss is used to be connected to the tab.

6. The electrode structure according to claim 5, characterized in that: The current collecting plate is provided with a first through hole, which is spaced apart from the boss; the adapter plate is provided with a second through hole, which corresponds to the first through hole.

7. The electrode structure according to any one of claims 1 to 4, characterized in that: The thickness of the current collecting plate is 0.6 mm to 1.1 mm, and the thickness of the adapter plate is 2 mm to 3 mm.

8. The electrode structure according to any one of claims 1 to 4, characterized in that: The electrode structure further includes an end cover, which is also hexagonal and has a third through hole. The end cover is sleeved on the pole through the third through hole and is located on a side of the adapter plate away from the current collecting plate.

9. The electrode structure according to any one of claims 1 to 4, characterized in that: The electrode structure is a negative electrode structure.

10. A battery, characterized in that: It comprises a shell, a battery cell and an electrode structure according to any one of claims 1 to 9, wherein the battery cell is installed in the shell, a pole ear is connected to the battery cell, and the pole ear is welded to the first surface of the current collecting plate.

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