Electrode module, battery cover plate and battery

Abstract

The utility model discloses an electrode module, a battery cover plate and a battery, and the electrode module comprises an electrode column, a metal connecting plate and an injection molding piece, the electrode column is used as a positive electrode or a negative electrode of the battery, and at least parts of the two opposite ends of the electrode column in the thickness direction are exposed to the outside; the metal connecting plate is hermetically and fixedly connected with a battery top plate; the injection molding part is formed between the electrode column and the metal connecting plate and is fixedly connected with the electrode column and the metal connecting plate in a sealed mode. The utility model provides the electrode module independent of the battery top plate, so that the battery module can be processed independently, the production efficiency is improved, and the production cost is reduced.

Description

[0001] This application claims priority to Chinese Patent Application No. 202420069415.3 filed on January 11, 2024, which is incorporated by reference in its entirety. Technical Field

[0002] The utility model relates to the technical field of batteries, and in particular to an electrode module, a battery cover and a battery. Background Art

[0003] New energy vehicles are a common type of vehicle currently available. New energy vehicles are a type of vehicle that can be driven by electricity, and power batteries are the main power source for existing new energy vehicles. Power batteries generally include a shell and structures such as electrode assemblies and electrolytes disposed in the shell. The shell includes a shell with an opening at the top, and a battery cover for sealing the opening at the top of the shell. The battery cover is provided with positive and negative poles, which are connected to the internal structure of the shell and are connected to other components as the positive and negative poles of the power battery.

[0004] The structure of the existing battery cover is that the cover and the positive and negative poles are integrated. The positive and negative poles are chemically treated and nano-injected during production. Due to the integrated structure of the cover and the positive and negative poles, chemical treatment and nano-injection molding need to be performed on the entire battery cover, which is inefficient and increases production costs. Utility Model Content

[0005] The utility model aims to provide an electrode module, a battery cover plate and a battery, which are used to provide an electrode module independent of a battery top plate, so as to independently process the battery module, improve production efficiency and reduce production costs.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] An electrode module, comprising:

[0008] An electrode column, used as a positive electrode or a negative electrode of a battery, wherein both opposite ends of the electrode column along its thickness direction are at least partially exposed to the outside;

[0009] A metal connecting plate, used for sealing and fixing connection with the battery top plate;

[0010] The injection molded part is formed between the electrode column and the metal connecting plate, and is sealed and fixedly connected to the electrode column and the metal connecting plate.

[0011] Preferably, the metal connecting plate includes a first connecting portion and a second connecting portion, the first connecting portion is used to be sealed and fixedly connected to the battery top plate; the injection molded part covers the second connecting portion and is sealed and fixedly connected to the second connecting portion.

[0012] Preferably, the second connection portion is arranged on one side of the electrode column along the height direction thereof, or the second connection portion is flush with a portion of the electrode column.

[0013] Preferably, the electrode column is provided with a step portion, and the injection molded part covers the step portion; or, the electrode column is provided with a groove formed by a depression from the side surface of the electrode column, and the injection molded part is filled in the groove.

[0014] Preferably, the first connection portion is fixed to the battery top plate by welding; and the injection molded part is fixed to the second connection portion and the electrode column by bonding.

[0015] Preferably, the injection molded part is formed with a accommodating cavity and a through hole which are interconnected, the axes of the accommodating cavity and the through hole are parallel to the thickness direction of the electrode column, the accommodating cavity is used to accommodate the electrode column, and one end of the electrode column protrudes from the accommodating cavity or is flush with one end of the accommodating cavity away from the through hole; the other end of the electrode column is connected to the outside through the through hole.

[0016] Preferably, the injection molded part is provided with a accommodating cavity, the accommodating cavity penetrates the injection molded part along the thickness of the electrode column, and the accommodating cavity is used to accommodate the electrode column; the electrode column includes a first end and a second end opposite to each other along its thickness direction, the first end protrudes from the accommodating cavity or is flush with the end of the accommodating cavity, and the second end protrudes from the accommodating cavity or is flush with the end of the accommodating cavity.

[0017] Preferably, the metal connecting plate includes a first main body portion and a first connecting portion; the battery top plate includes a connecting end connected to the first connecting portion;

[0018] The connecting end is arranged flush with the first connecting portion;

[0019] Or, the connecting end comprises a matching portion and a second main body portion, the matching portion is flush with the lower end of the second main body portion, the first connecting portion is flush with the upper end of the first main body portion, and the matching portion and the first connecting portion are stacked along the thickness direction of the metal connecting plate;

[0020] Alternatively, the connecting end includes a mating portion and a second main body portion, the mating portion is flush with the upper end of the second main body portion, the first connecting portion is flush with the lower end of the first main body portion, and the mating portion and the first connecting portion are stacked along the thickness direction of the metal connecting plate.

[0021] A battery cover, comprising:

[0022] The battery top plate is provided with a mounting hole penetrating along the thickness direction thereof;

[0023] Any one of the above-mentioned battery modules is installed in the installation hole, and the metal connecting plate in the battery module is sealed and fixed to the battery top plate.

[0024] Preferably, the battery modules include two, wherein the electrode column of one battery module is a positive electrode column, and the electrode column of the other battery module is a negative electrode column;

[0025] And / or, the battery top plate is an aluminum alloy plate or a stainless steel plate, the metal connecting plate is an aluminum plate, and the battery top plate is fixed to the metal connecting plate by welding.

[0026] A battery comprises any one of the above battery cover plates.

[0027] Compared with the prior art, the beneficial effects of the present invention include at least:

[0028] By setting up an independent electrode module, it is possible to perform chemical treatment, nano-injection molding and other processing processes on the electrode module separately, thereby avoiding the situation in which the electrode module and the battery top plate are integrated, resulting in low efficiency and high cost of chemical treatment and nano-injection molding; and the electrode module can be connected to the battery top plate through a metal connecting plate, so that the processed electrode module can be kept sealed and fixed to the battery top plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a planar cross-sectional view of an embodiment of the present invention when the electrode module is a positive electrode module;

[0030] Figure 2 It is a planar cross-sectional view of another embodiment of the utility model when the electrode module is a positive electrode module;

[0031] Figure 3 It is a planar cross-sectional view when the electrode module in one embodiment of the utility model is a negative electrode module;

[0032] Figure 4 It is a planar cross-sectional view of another embodiment of the utility model when the electrode module is a negative electrode module;

[0033] Figure 5 is a planar cross-sectional view of an electrode module according to another embodiment of the present utility model;

[0034] Figure 6 is a planar cross-sectional view of an electrode module according to yet another embodiment of the present utility model;

[0035] Figure 7This is a schematic structural diagram of a battery cover plate according to an embodiment of the utility model;

[0036] Figure 8 It is a planar cross-sectional view of a battery cover plate of an embodiment of the utility model;

[0037] Fig. 9 It is a partial cross-sectional view of a battery cover plate of an embodiment of the utility model;

[0038] Fig.10 It is a partial cross-sectional view of a battery cover plate of another embodiment of the utility model;

[0039] Fig.11 It is a partial cross-sectional view of a battery cover according to another embodiment of the utility model.

[0040] In the figure: 1. electrode module; 11. electrode column; 111. step portion; 112. groove; 12. metal connecting plate; 121. first connecting portion; 122. second connecting portion; 123. first main body; 13. injection molded part; 131. accommodating cavity; 132. through hole; 2. battery top plate; 21. mounting hole; 22. connecting end; 221. mating portion; 222. second main body. DETAILED DESCRIPTION

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0042] The words expressing positions and directions described in the present utility model are all explained by taking the drawings as examples, but they can be changed as needed, and all the changes are included in the protection scope of the present utility model.

[0043] like Figures 1 to 6 As shown, an electrode module 1 corresponding to an embodiment of the present invention includes an electrode column 11 , a metal connecting plate 12 and an injection molded part 13 .

[0044] The electrode column 11 can be used as the positive electrode or negative electrode of the battery; when the electrode column 11 is a positive electrode column, the electrode column 11 can be used as the positive electrode of the battery, and when the electrode column 11 is a negative electrode column, the electrode column 11 can be used as the negative electrode of the battery. The electrode column 11 includes a first end and a second end relative to each other along its thickness direction, and the first end and the second end are at least partially exposed to the outside world. Among them, when the electrode module 1 is applied to a battery, the exposed portion of the first end can be exposed to the outer shell of the battery and used as the positive electrode or negative electrode of the battery to connect with external components. The external component can be a device that needs to be powered by a battery. The exposed portion of the second end can be connected to the components inside the battery so that the battery can power the external components. The components inside the battery can be components such as electrode assemblies and electrolytes.

[0045] The metal connecting plate 12 is fixed to the electrode column 11 and the injection molded part 13, and the metal connecting plate 12 can be used to be sealed and fixedly connected to the battery top plate 2, so that the electrode module 1 is sealed and fixed to the battery top plate 2. The metal connecting plate 12 may include a first connecting portion 121, a second connecting portion 122, and a first main body portion 123 connecting the first connecting portion 121 and the second connecting portion 122. The first connecting portion 121 and the second connecting portion 122 are arranged at opposite ends of the first main body portion 123. The first connecting portion 121 is used to be sealed and fixedly connected to the battery top plate 2; preferably, the first connecting portion 121 is welded and fixed to the battery top plate 2, and can be specifically fixed by laser welding. The laser welding fixation method can make the first connection part 121 stably fixed to the battery top plate 2, and compared with riveting fixation and other methods, the laser welding fixation method has lower cost; and after the first connection part 121 is welded and fixed to the battery top plate 2, the connection part between the first connection part 121 and the battery top plate 2 is sealed. Compared with the fixing formation of the sealing ring, the welding seal is not easy to wear and fail, has a longer life, and the welding seal has higher sealing reliability. Among them, the metal connecting plate 12 can be an aluminum plate, and the first connection part 121, the second connection part 122 and the first main body 123 can be an integrated structure.

[0046] Reference Figure 5 In some specific embodiments, the first connection portion 121 may be formed by extending from the side of the first main body portion 123 away from the second connection portion 122 in a direction away from the second connection portion 122, the thickness of the first main body portion 121 may be the same as the thickness of the first main body portion 123, and the first connection portion 121 is flush with the first main body portion 123, that is, the upper surface of the first main body portion 121 is flush with the upper surface of the first main body portion 123, and the lower surface of the first main body portion 121 is flush with the lower surface of the first main body portion 123. The side of the first connection portion 121 away from the first main body portion 123 is used to connect the battery top plate 2, and the angle formed by the side of the first connection portion 121 away from the first main body portion 123 and the upper surface of the first connection portion 121 may be 1-179°.

[0047] Reference Figures 1 to 4 In some other specific embodiments, the first connection portion 121 may be formed by extending from the side of the first main body 123 away from the second connection portion 122 in a direction away from the second connection portion 122, the thickness of the first main body 121 may be less than the thickness of the first main body 123, and the first connection portion 121 is flush with the upper end of the first main body 123, that is, the upper surface of the first connection 121 is flush with the upper surface of the first main body 123. The side of the first connection portion 121 away from the first main body 123 and the lower surface of the first connection portion 121 can be used to connect the battery top plate 2.

[0048] Reference Figure 6 In other specific embodiments, the first connection portion 121 may be formed by extending from the side of the first main body 123 away from the second connection portion 122 in a direction away from the second connection portion 122, the thickness of the first main body 121 may be less than the thickness of the first main body 123, and the first connection portion 121 is flush with the lower end of the first main body 123, that is, the lower surface of the first connection 121 may be flush with the lower surface of the first main body 123. The side of the first connection portion 121 away from the first main body 123 and the upper surface of the first connection portion 121 can be used to connect the battery top plate 2.

[0049] The second connection portion 122 is used for sealing and fixing the injection molded part 13 , so that the injection molded part 13 and the electrode column 11 fixedly connected to the injection molded part 13 can be fixed to the metal connection plate 12 , and the electrode module 1 forms an integral structure.

[0050] The injection molded part 13 is injection molded between the electrode column 11 and the metal connecting plate 12, so that the injection molded part 13 is bonded and fixed to the electrode column 11 and the metal connecting plate 12 by its own viscosity; and, after the injection molded part 13 is filled between the electrode column 11 and the metal connecting plate 12, the connection between the electrode column 11 and the metal connecting plate 12 can be sealed, thereby realizing a sealed and fixed connection between the injection molded part 13 and the electrode column 11 and the metal connecting plate 12. Specifically, the injection molded part 13 can be bonded and fixed to the second connecting portion 122 in the metal connecting plate 12. In order to ensure the stability of the connection between the injection molded part 13 and the second connecting portion 122, the injection molded part 13 can cover the second connecting portion 122, for example, the injection molded part 13 covers the top and bottom surfaces of the second connecting portion 122 along its thickness direction, and part of the side surface of the second connecting portion 122. The material of the injection molded part 13 may be one or more of PPS (polyphenylene sulfide) plastic, LCP (liquid crystal polymer) plastic, PEEK (polyetheretherketone) plastic, PBT (polybutylene terephthalate) plastic or PI (polyimide) plastic.

[0051] Reference Figure 1 and Figure 3In some specific embodiments, the second connection portion 122 is arranged on the side of the electrode column 11 facing the battery top plate 2, for example, the second connection portion 122 is arranged below the battery top plate 2. The injection molded part 13 covers the second connection portion 122 and forms a receiving cavity 131 and a through hole 132 that are interconnected. The receiving cavity 131 is located above the second connection portion 122, and the receiving cavity 131 can be used to receive the electrode column 11. At this time, the second connection portion 122 can support the electrode column 11. In order to connect the first end of the electrode column 11 with an external component, the first end of the electrode column 11 can protrude from the receiving cavity 131 or be flush with the end of the receiving cavity 131 away from the through hole 132. The second end of the electrode column 11 can extend to the through hole 132, and the through hole 132 passes through the injection molded part 13, so that the portion of the electrode column 11 exposed to the through hole 132 can be connected to the outside through the through hole 132.

[0052] In addition, in order to improve the connection stability between the injection molded part 13 and the electrode column 11, the electrode column 11 may be provided with a step portion 111. The injection molded part 13 covers the step portion 111 to improve the stability of the connection between the injection molded part 13 and the electrode column 11. It should be pointed out that the injection molded part 13 may not cover the step portion 111 of the electrode column 11, but only be bonded and fixed to the side of the electrode column 11, which is not limited here.

[0053] Reference Figure 2 and Figure 4 In some other specific embodiments, the second connection portion 122 may be flush with a portion of the electrode column 11, and the injection molded part 13 is filled between the second connection portion 122 and the electrode column 11, and a receiving cavity 131 for receiving the electrode column 11 is formed. The first end of the electrode column 11 may be flush with one end of the receiving cavity 131, or protrude from the receiving cavity 131, and the second end of the electrode column 11 may be flush with the other end of the receiving cavity 131, or protrude from the receiving cavity 131, so as to facilitate the connection between the first end of the electrode column 11 and the external components and the second end of the electrode column 11 and the internal components of the battery.

[0054] In addition, in order to improve the connection stability between the injection molded part 13 and the electrode column 11, the electrode column 11 can be provided with a groove 112 formed inwardly along its side surface, and the injection molded part 13 is filled in the groove 112, so that the part of the injection molded part 13 located in the groove 112 can be used to support the electrode column 11, so as to reduce the influence of the self-weight of the electrode column 11 on the connection stability between the injection molded part 13 and the electrode column 11. At the same time, the part of the injection molded part 13 located in the groove 112 can also increase the connection area between the injection molded part 13 and the electrode column 11, thereby improving the connection stability between the injection molded part 13 and the electrode column 11.

[0055] When manufacturing the electrode module 1, the metal connecting plate 12 is first formed by a stamping process, and the electrode column 11 is formed by stamping, cold heading, machining and other processes; wherein, when the electrode column 11 is a positive electrode column or a negative electrode column, it is formed by stamping, cold heading, machining and other processes. After the metal connecting plate 12 and the electrode column 11 are formed, the metal connecting plate 12 and the electrode column 11 are chemically treated to form nanopores on the surfaces of the metal connecting plate 12 and the electrode column 11, and then the metal connecting plate 12 and the electrode column 11 are buried in a mold for nano injection molding to form an injection molded part 13. The injection molded part 13 flows between the metal connecting plate 12 and the electrode column 11 in a liquid state, and then is cooled and fixed, and is bonded and sealed to the metal connecting plate 12 and the electrode column 11. By subjecting the electrode column 11 and the metal connecting plate 12 to chemical treatment and nano-injection molding, the volume of the electrode column 11 and the metal connecting plate 12 is smaller than that of the existing integral battery cover plate, which can reduce the volume of the workpiece processed during chemical treatment and nano-injection molding, improve processing efficiency, and reduce processing costs.

[0056] like Figure 7 and Figure 8 As shown, the utility model further provides a battery cover plate, comprising a battery top plate 2 and the above-mentioned electrode module 1.

[0057] The battery top plate 2 is provided with a mounting hole 21 that penetrates along its thickness direction, and the mounting hole 21 is used for the installation of the electrode module 1. The mounting hole 21 can be one or more. Among them, the number of mounting holes 21 is the same as the number of electrode modules 1, and they correspond one to one. The battery top plate 2 can also include a connecting end 22, and the connecting end 22 is used to connect the electrode module 1, and the connecting end 22 can be surrounded to form the mounting hole 21. The first connecting portion 121 of the electrode module 1 can be flush with the connecting end 22 of the battery top plate 2, and the electrode module 1 can be connected to the battery top plate 2 only through the first connecting portion 121, and the electrode column 11 and the injection molded part 13 in the electrode module 1 can be suspended on the battery top plate 2. The battery top plate 2 is a metal top plate, specifically, the battery top plate 2 is an aluminum alloy plate or a stainless steel plate.

[0058] Reference Fig. 9In some specific embodiments, the thickness of the first connection part 121 in the electrode module 1 is the same as the thickness of the first main body 123, and the first connection part 121 is flush with the first main body 123. The thickness of the connection end 22 can be the same as the thickness of the first connection part 121, and the connection end 22 can be flush with the first connection part 121. Specifically, the side of the connection end 22 facing the mounting hole 21 can be parallel to the side of the first connection part 121 away from the main body 123, and when the electrode module 1 is installed on the battery top plate 2, the side of the connection end 22 facing the mounting hole 21 is aligned with the side of the first connection part 121 away from the main body 123, and laser welding is performed at the bonding position of the connection end 22 and the first connection part 121 to achieve the connection between the electrode module 1 and the battery top plate 2. Among them, the upper surface of the connection end 22 is flush with the upper surface of the first connection part 121, and the lower surface of the connection end 22 is flush with the lower surface of the first connection part 121.

[0059] Reference Fig.10 In some other specific embodiments, the thickness of the first connection portion 121 in the electrode module 1 may be less than the thickness of the first main body portion 123, and the first connection portion 121 is flush with the upper end of the first main body portion 123. The connection end 22 may include a matching portion 221 and a second main body portion 222 connected to the matching portion 221. The matching portion 221 is disposed at one end of the second main body portion 222 facing the electrode module 1, and the thickness of the second main body portion 222 may be the same as the thickness of the first main body portion 123. The matching portion 221 may be flush with the lower end of the second main body portion 222, that is, the lower surface of the matching portion 221 is flush with the lower surface of the second main body portion 222. When the electrode module 1 is mounted on the battery top plate 2, the matching portion 221 and the first connecting portion 121 are stacked along the thickness direction of the metal connecting plate 12, that is, the upper surface of the matching portion 221 is in contact with the lower surface of the first connecting portion 121, and the thickness of the whole formed by stacking the matching portion 221 and the second connecting portion 121 is the same as the thickness of the first main body 123, that is, the upper surface of the second main body 222 is flush with the upper surface of the first connecting portion 121, and the lower surface of the matching portion 221 is flush with the lower surface of the first main body 123. Laser welding is performed at the connection position between the connecting end 22 and the first connecting portion 121 to achieve the connection between the electrode module 1 and the battery top plate 2.

[0060] Reference Fig.11In other specific embodiments, the thickness of the first connection part 121 in the electrode module 1 may be less than the thickness of the first main body part 123, and the first connection part 121 is flush with the lower end of the first main body part 123. The connection end 22 may include a matching part 221 and a second main body part 222 connected to the matching part 221. The matching part 221 is arranged at one end of the second main body part 222 facing the electrode module 1, and the thickness of the second main body part 222 may be the same as the thickness of the first main body part 123. The matching part 221 may be flush with the upper end of the second main body part 222, that is, the upper surface of the matching part 221 is flush with the upper surface of the second main body part 222. When the electrode module 1 is mounted on the battery top plate 2, the matching portion 221 and the first connecting portion 121 are stacked along the thickness direction of the metal connecting plate 12, that is, the lower surface of the matching portion 221 is in contact with the upper surface of the first connecting portion 121, and the thickness of the whole formed by stacking the matching portion 221 and the second connecting portion 121 is the same as the thickness of the first main body 123, that is, the lower surface of the second main body 222 is flush with the lower surface of the first connecting portion 121, and the upper surface of the matching portion 221 is flush with the upper surface of the first main body 123. Laser welding is performed at the connection position between the connecting end 22 and the first connecting portion 121 to achieve the connection between the electrode module 1 and the battery top plate 2.

[0061] It is noted that for the convenience of description, the present invention will refer to Figure 1 The up and down directions are defined by an angle, that is, the up and down directions are defined by the thickness direction of the electrode column 11 or the thickness direction of the connecting plate 12. Figure 1 The side of the middle electrode column 11 facing away from the connecting plate 12 is the upper side, and the side of the connecting plate 12 facing away from the electrode column 11 is the lower side. The upper surfaces of the first connecting portion 121, the main body 123, the connecting end 22, the matching portion 221, and the second main body 222 are the surfaces where the first connecting portion 121, the main body 123, the connecting end 22, the matching portion 221, and the second main body 222 are located at the upper side, and the lower surfaces of the first connecting portion 121, the main body 123, the connecting end 22, the matching portion 221, and the second main body 222 are the surfaces where the first connecting portion 121, the main body 123, the connecting end 22, the matching portion 221, and the second main body 222 are located at the lower side. The side surfaces of the first connecting portion 121 and the connecting end 22 are the surfaces connecting the corresponding upper and lower surfaces.

[0062] Only one electrode module 1 may be provided, for example, the electrode module 1 is a positive electrode module, and the negative electrode module is provided integrally with the battery top plate 2 in a conventional manner. As a preferred embodiment, two electrode modules 1 are provided, wherein the electrode column 11 of one electrode module 1 is a positive electrode column, and the electrode module 1 is used as a positive electrode module, and the electrode column 11 of the other electrode module 1 is a negative electrode column, and the electrode module 1 is used as a negative electrode module. When the electrode module 1 is manufactured, the electrode module 1 is installed in the mounting hole 21, and the first connecting portion 121 of the metal connecting plate 12 in the electrode module 1 is laser welded and fixed to the battery top plate 2 to achieve a sealed fixed connection between the electrode module 1 and the battery top plate 2. Therefore, the battery top plate 2 may not participate in the chemical treatment and nano injection molding processes in the electrode module 1, and it can be avoided that the battery top plate 2 has a rough surface after the chemical treatment and nano injection molding processes, which makes it difficult to identify the traceability code made on the rough surface, or the battery top plate 2 has residual electrolyte near the injection port for injecting electrolyte, which makes it difficult to weld at this position and causes poor welding.

[0063] This embodiment also provides a battery, which can be a power battery for new energy vehicles. The battery includes the above-mentioned battery cover and a shell. The shell is used to accommodate internal components such as an electrode assembly and an electrolyte in the battery, and the top end of the shell is open. The battery cover is used to block the top end opening of the shell.

[0064] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the utility model. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the utility model.

Claims

1. An electrode module, characterized in that: include: An electrode column (11) is used as a positive electrode or a negative electrode of a battery, and opposite ends of the electrode column (11) along its thickness direction are at least partially exposed to the outside world; A metal connecting plate (12) used for sealing and fixing the connection with the battery top plate (2); The injection molded part (13) is molded between the electrode column (11) and the metal connecting plate (12), and is sealed and fixedly connected to the electrode column (11) and the metal connecting plate (12).

2. The electrode module according to claim 1, characterized in that: The metal connecting plate (12) comprises a first connecting portion (121) and a second connecting portion (122), wherein the first connecting portion (121) is used for being sealed and fixedly connected to the battery top plate (2); and the injection molded part (13) covers the second connecting portion (122) and is sealed and fixedly connected to the second connecting portion (122).

3. The electrode module according to claim 2, characterized in that: The second connection portion (122) is arranged on one side of the electrode column (11) along its height direction, or the second connection portion (122) is flush with a portion of the electrode column (11) in height.

4. The electrode module according to claim 3, characterized in that: The electrode column (11) is provided with a step portion (111), and the injection molded part (13) covers the step portion (111); or, the electrode column (11) is provided with a groove (112) formed by a depression from the side of the electrode column (11), and the injection molded part (13) is filled in the groove (112).

5. The electrode module according to claim 2, characterized in that: The first connection portion (121) is fixed to the battery top plate (2) by welding; and the injection molded part (13) is fixed to the second connection portion (122) and the electrode column (11) by bonding.

6. The electrode module according to claim 1, characterized in that: The injection molded part (13) is formed with a receiving cavity (131) and a through hole (132) which are interconnected, the axes of the receiving cavity (131) and the through hole (132) being parallel to the thickness direction of the electrode column (11), the receiving cavity (131) being used to accommodate the electrode column (11), and one end of the electrode column (11) protrudes out of the receiving cavity (131) or is flush with one end of the receiving cavity (131) which is away from the through hole (132); the other end of the electrode column (11) is connected to the outside through the through hole (132).

7. The electrode module according to claim 1, characterized in that: The injection molded part (13) is provided with a receiving cavity (131), the receiving cavity (131) penetrates the injection molded part (13) along the thickness of the electrode column (11), and the receiving cavity (131) is used to accommodate the electrode column (11); the electrode column (11) comprises a first end and a second end opposite to each other along the thickness direction thereof, the first end protrudes from the receiving cavity (131) or is flush with the end of the receiving cavity (131), and the second end protrudes from the receiving cavity (131) or is flush with the end of the receiving cavity (131).

8. A battery cover, characterized in that: include: The battery top plate (2) is provided with a mounting hole (21) penetrating along the thickness direction thereof; The electrode module (1) according to any one of claims 1 to 7 is installed in the installation hole (21), and the metal connecting plate (12) in the electrode module (1) is sealed and fixed to the battery top plate (2).

9. The battery cover according to claim 8, characterized in that: The electrode modules (1) include two, wherein the electrode column (11) of one electrode module (1) is a positive electrode column, and the electrode column (11) of the other electrode module (1) is a negative electrode column; And / or, the battery top plate (2) is an aluminum alloy plate or a stainless steel plate, the metal connecting plate (12) is an aluminum plate, and the battery top plate (2) and the metal connecting plate (12) are welded and fixed.

10. The battery cover according to claim 8, characterized in that: The metal connecting plate (12) comprises a first main body portion (123) and a first connecting portion (121); the battery top plate (2) comprises a connecting end (22) connected to the first connecting portion (121); The connecting end (22) is arranged flush with the first connecting portion (121); Or, the connecting end (22) comprises a matching portion (221) and a second main body portion (222), the matching portion (221) is flush with the lower end of the second main body portion (222), the first connecting portion (121) is flush with the upper end of the first main body portion (123), and the matching portion (221) and the first connecting portion (121) are stacked along the thickness direction of the metal connecting plate (12); Alternatively, the connecting end (22) includes a mating portion (221) and a second main body portion (222), the mating portion (221) is flush with the upper end of the second main body portion (222), the first connecting portion (121) is flush with the lower end of the first main body portion (123), and the mating portion (221) and the first connecting portion (121) are stacked along the thickness direction of the metal connecting plate (12).

11. A battery, characterized in that: Comprising the battery cover as described in any one of claims 8 to 10.

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