Top cover structure, battery and electric device

Abstract

The utility model relates to a top cover structure, a battery and an electric device. The top cover structure comprises a top cover plate, a pole assembly and lower plastic cement, the pole assembly is arranged on the top cover plate, the pole assembly and the top cover plate are in insulation connection, and the top cover plate and the lower plastic cement are assembled and fixed; the top cover plate is used for being connected with a first tab of a pole core, the pole column assembly is used for being connected with a second tab of the pole core, and the polarity of the first tab is opposite to that of the second tab. The utility model also provides a battery which comprises the top cover structure disclosed by the utility model. The utility model also provides an electric device which comprises the battery disclosed by the utility model. According to the utility model, the problem that the battery core pole is extruded by deformation of the floor is reduced, the top cover structure is simplified, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a top cover structure, a battery and an electric device. Background Art

[0002] With the rapid development of new energy vehicle technology and the intensification of market competition, how to reduce production costs, improve production efficiency and enhance vehicle performance has become the focus of the industry. In the manufacturing process of new energy vehicles, as an important part of the vehicle body structure, the assembly process complexity of the top cover assembly affects the production cost of the whole vehicle.

[0003] For example, the top cover assembly and secondary battery disclosed in CN209496906U. The top cover assembly includes a top cover plate, an electrode terminal, a fixing member and a connecting member. The top cover plate has an electrode lead-out hole. The electrode terminal includes a terminal plate which is located on one side of the top cover plate and covers the electrode lead-out hole. The fixing member at least partially surrounds the terminal plate to fix the terminal plate to the fixing member. The connecting member is separated from the electrode terminal through the fixing member, and the connecting member is connected to the top cover plate. The connecting member includes a main body portion, and the main body portion is provided with a first groove opened downward along the top of the main body portion. A part of the fixing member is located in the first groove. This top cover assembly has the problem of complex assembly process, resulting in a relatively high process cost of the top cover assembly.

[0004] In addition, the cruising range of new energy vehicles has always been a hot issue concerned by consumers. In order to alleviate range anxiety, the battery system of new energy vehicles has gradually evolved towards a higher volume utilization rate. Among them, the integration method of the battery cell and the vehicle body floor has become the focus of research. The future trend is that the battery cell will be directly integrated with the vehicle body floor to maximize the use of the interior space of the vehicle and improve the energy density.

[0005] However, with the implementation of the technology of integrating the battery cell and the vehicle body floor, new technical challenges have emerged. Since the distance between the floor and the battery cell pole in the height direction is getting smaller and smaller, the deformation of the floor may squeeze the battery cell pole, thus affecting the safety and performance of the battery. Therefore, how to solve the problem of the floor deformation squeezing the battery cell pole has become an urgent problem to be solved in the research and development of future new energy vehicles. Summary of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide a top cover structure, a battery and an electric device to reduce the problem of the floor deformation squeezing the battery cell pole, simplify the top cover structure and reduce the production cost.

[0007] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0008] A top cover structure includes a top cover plate, a pole column assembly, and a lower plastic. The pole column assembly is arranged on the top cover plate, and the pole column assembly is insulated from the top cover plate. The top cover plate is fixedly assembled with the lower plastic.

[0009] The top cover plate is used to connect with the first pole tab of the electrode core, and the pole column assembly is used to connect with the second pole tab of the electrode core. Among them, the polarities of the first pole tab and the second pole tab are opposite.

[0010] According to the above technical means, by directly connecting the top cover plate with the first pole tab of the electrode core, the top cover plate is used as a pole column, which not only effectively reduces the processing and assembly of pole column-related components and simplifies the manufacturing and assembly processes of the top cover assembly. At the same time, the side of the top cover plate without a pole column can be arranged in the floor trampling deformation area, thus effectively reducing the problem of the floor deformation squeezing the electrode core pole column. And the side surface of the top cover plate without a pole column can directly serve as a bearing surface and be in direct contact with the floor, thereby effectively increasing the contact area between the top cover plate and the floor and further reducing the damage to the electrode core caused by the trampling floor deformation. In addition, since there is no pole column on one side of the top cover plate, there is no need to consider problems such as the sealing ring failure when the pole column bears force.

[0011] Preferably, a top cover plate sink is formed on the top of the top cover plate, and a top cover plate inner boss is formed at a position corresponding to the top cover plate sink at the bottom of the top cover plate. The top cover plate inner boss is used to connect with the first pole tab of the electrode core.

[0012] By forming a top cover plate sink on the top of the top cover plate, it is convenient to use the top cover plate as an electrode to connect with the external aluminum bar; by forming a top cover plate inner boss at a position corresponding to the top cover plate sink at the bottom of the top cover plate, it is convenient to connect the pole tabs.

[0013] Preferably, a lower plastic through hole is provided on the lower plastic, and the top cover plate inner boss is embedded in the lower plastic through hole.

[0014] By providing a lower plastic through hole on the lower plastic for embedding the top cover plate inner boss, the stability and assembly accuracy of the top cover structure are ensured.

[0015] Preferably, the top cover structure further includes an electrode adapter plate. The electrode adapter plate is connected with the top cover plate inner boss and is used to connect with the first pole tab of the electrode core.

[0016] By providing an electrode adapter plate to connect the top cover plate inner boss and the pole tab of the electrode core, the assembly is facilitated.

[0017] Preferably, a lower plastic through hole for the first pole tab of the electrode core to pass through is provided on the lower plastic, so that the first pole tab of the electrode core directly passes through the lower plastic through hole and is connected with the top cover plate.

[0018] By providing a through-hole in the lower plastic, the first tab of the electrode core directly passes through the through-hole in the lower plastic and is connected to the top cover plate, effectively realizing the fixation of the tab and having the advantage of a simple structure.

[0019] Preferably, a sunk platform is formed on the top of the top cover plate, an electrode post plate is installed on the sunk platform of the top cover plate, the electrode post plate is flush with the top cover plate, and the top cover plate is connected to the first tab of the electrode core through the electrode post plate.

[0020] By providing a sunk platform on the top cover plate, providing an electrode post plate on the sunk platform of the top cover plate, and making the electrode post plate flush with the top cover plate, the electrode post plate simultaneously serves as a part of the top cover plate and an electrode post, that is, the function of the electrode post is realized, the structural integrity of the top cover plate is ensured, and the safety risk existing when the entire top cover plate is used as an electrode post is also reduced.

[0021] Preferably, a through-hole is provided on the sunk platform of the top cover plate, and a through-hole for the first tab of the electrode core to pass through is provided on the lower plastic at a position corresponding to the through-hole, so that the first tab of the electrode core directly passes through the through-hole in the lower plastic and the through-hole and is connected to the electrode post plate.

[0022] By simultaneously providing a through-hole on the sunk platform of the top cover plate and a through-hole in the corresponding position on the lower plastic, the first tab of the electrode core directly passes through the through-hole in the lower plastic and the through-hole and is connected to the electrode post plate, effectively realizing the connection with the first tab and the fixation of the first tab.

[0023] Preferably, the top cover plate is used to be connected to the first tab of the positive electrode of the electrode core.

[0024] Preferably, the top cover plate is used to be connected to the first tab of the negative electrode of the electrode core.

[0025] The present invention also provides a battery, including the top cover structure of the present invention.

[0026] The present invention also provides an electrical device, including the battery of the present invention.

[0027] The beneficial effects of the present invention:

[0028] The top cover structure of the present utility model directly connects the top cover plate to the first pole ear of the electrode core, so that the top cover plate is used as a pole column, which not only effectively reduces the processing and assembly of pole column-related components and simplifies the manufacturing and assembly processes of the top cover assembly. At the same time, the side of the top cover plate without a pole column can be arranged in the floor trampling deformation area, effectively reducing the problem of the floor deformation squeezing the electrode core pole column. Moreover, the side surface of the top cover plate without a pole column can directly serve as a load-bearing surface and be in direct contact with the floor, effectively increasing the contact area between the top cover plate and the floor and further reducing the damage to the electrode core caused by the trampling floor deformation. In addition, due to the setting of no pole column on one side of the top cover plate, there is no need to consider problems such as the sealing ring failure when the pole column bears force, and it has the advantages of simple structure and low cost, and has the value of popularization and application in the battery technology field. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the top cover structure of the present utility model;

[0030] Figure 2 is Figure 1 a sectional view taken along line A-A in

[0031] Figure 3 is an exploded view of the top cover structure of the present utility model;

[0032] Figure 4 is a schematic structural diagram of the second top cover structure of the present utility model;

[0033] Figure 5 is a schematic structural diagram of the third top cover structure of the present utility model;

[0034] Among them, 1 - top cover plate, 11 - top cover plate sunk platform, 12 - top cover plate inner convex platform, 13 - electrode column plate, 14 - through hole; 2 - pole column assembly; 3 - lower plastic, 31 - lower plastic through hole; 4 - electrode adapter, 41 - top cover plate welding surface, 42 - pole ear welding surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following will describe the embodiments of the present utility model with reference to the drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for explaining the present utility model and not for limiting the protection scope of the present utility model.

[0036] It should be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0037] In the following description, a large number of details are explored to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. Embodiment

[0038] As Figures 1 to 5 shown, a top cover structure includes a top cover plate 1, a terminal assembly 2, and a lower plastic 3. The terminal assembly 2 is provided on the top cover plate 1, and the terminal assembly 2 is insulated from the top cover plate 1. The top cover plate 1 is fixedly assembled with the lower plastic 3;

[0039] The top cover plate 1 is used to be connected to the first tab of the electrode core, and the terminal assembly 2 is used to be connected to the second tab of the electrode core. Among them, the polarities of the first tab and the second tab are opposite.

[0040] By directly connecting the top cover plate to the first tab of the electrode core, the top cover plate is used as a terminal, which not only effectively reduces the processing and assembly of terminal-related components, simplifies the manufacturing and assembly processes of the top cover assembly. At the same time, the side of the top cover plate without a terminal can be arranged in the floor trampling deformation area, thus effectively reducing the problem of the floor deformation squeezing the electrode terminal of the battery cell. And the side surface of the top cover plate without a terminal can also directly serve as a bearing surface and be in direct contact with the floor, thereby effectively increasing the contact area between the top cover plate and the floor, further reducing the damage to the battery cell caused by the trampling floor deformation. In addition, since there is no terminal on one side of the top cover plate, there is no need to consider problems such as the sealing ring failure when the terminal bears force.

[0041] In some embodiments, in order to facilitate the connection of the top cover plate as an electrode to the external aluminum bar, a top cover plate sink 11 is formed on the top of the top cover plate 1. At the same time, in order to facilitate the connection to the tab of the electrode core, a top cover plate inner boss 12 is formed at the bottom of the top cover plate 1 corresponding to the top cover plate sink 11. The top cover plate inner boss 12 is used to be connected to the first tab of the electrode core.

[0042] Among them, the top cover plate sink 11 is directly formed by stamping on the top cover plate 1. In this way, the top cover plate inner boss 12 can be formed at the bottom of the top cover plate 1 corresponding to the top cover plate sink 11, and the volume of the space reduced by stamping is greater than or equal to the volume of the top cover plate inner boss 12.

[0043] In some embodiments, in order to ensure the stability and assembly accuracy of the top cover structure, a lower plastic through-hole 31 is provided on the lower plastic 3, so that the inner boss 12 of the top cover plate is embedded in the lower plastic through-hole 31.

[0044] Among them, the shape of the inner boss 12 of the top cover plate can be circular, square or polygonal. It is best when the shape of the inner boss 12 of the top cover plate is circular, because the circular inner boss 12 of the top cover plate matches the circular lower plastic through-hole 31, and the force is evenly distributed, avoiding the risk of damage caused by excessive local force. The number of the inner bosses 12 of the top cover plate can be one, or two or more. The actual number of the inner bosses 12 of the top cover plate can be adaptively set according to the layout of the current collector of the electrode core.

[0045] In some embodiments, for the convenience of assembly, the top cover structure further includes an electrode adapter plate 4. The electrode adapter plate 4 is connected to the inner boss 12 of the top cover plate, and the electrode adapter plate 4 is used to connect to the first pole ear of the electrode core.

[0046] Exemplarily, a top cover welding surface 41 and a pole ear welding surface 42 are provided on the electrode adapter plate 4. The top cover welding surface 41 is in contact fit with the inner boss 12 of the top cover plate, and the pole ear welding surface 42 is in contact with the first pole ear of the electrode core.

[0047] Among them, in order to ensure good electrical conductivity between the electrode adapter plate 4 and the inner boss 12 of the top cover plate and the pole ear, it is set that the top cover welding surface 41 is in surface contact with the inner boss 12 of the top cover plate, and the pole ear welding surface 42 is in surface contact with the first pole ear of the electrode core. In order to facilitate the distinction between the top cover welding surface 41 and the pole ear welding surface 42, a notch can be provided on the pole ear welding surface 42.

[0048] In some embodiments, in order to effectively fix the pole ear and ensure a simple structure, a lower plastic through-hole 31 for the first pole ear of the electrode core to pass through is directly provided on the lower plastic 3, so that the first pole ear of the electrode core directly passes through the lower plastic through-hole 31 and is connected to the top cover plate 1.

[0049] In some embodiments, a top cover sunk platform 11 is formed on the top of the top cover plate 1. An electrode post plate 13 is installed on the top cover sunk platform 11 and the electrode post plate 13 is flush with the surface of the top cover plate 1. The top cover plate 1 is connected to the first pole ear of the electrode core through the electrode post plate 13. Designed in this way, the electrode post plate serves as both a part of the top cover and a pole post, that is, the function of the pole post is realized, the structural integrity of the top cover is ensured, and at the same time, the safety risk of using the entire top cover as a pole post is reduced.

[0050] Among them, the edge of the electrode post plate 13 is fixedly welded and sealed with the top cover sunk platform 11, and the outside of the electrode post plate 13 is used for electrical connection with the aluminum bar.

[0051] In some embodiments, in order to simultaneously achieve the connection between the electrode post plate and the first tab, and the fixation of the first tab. A through hole 14 is provided on the counterbore 11 of the top cover plate, and a lower plastic through hole 31 for the first tab of the electrode core to pass through is provided at a position corresponding to the through hole 14 on the lower plastic 3, so that the first tab of the electrode core directly passes through the lower plastic through hole 31 and the through hole 14 to be connected to the electrode post plate 13.

[0052] In some embodiments, the top cover plate 1 is used to connect to the first tab of the positive electrode of the electrode core. At this time, the top cover plate 1 is used as the positive electrode post, and the electrode post assembly 2 is used as the negative electrode post. When the top cover plate 1 is used as the positive electrode post, the top cover plate 1 is made of 3-series aluminum material to improve the conductivity of the top cover plate 1. When the electrode post plate 13 provided on the top cover plate 1 is used as the positive electrode post, the electrode post plate 13 can be made of 1-series aluminum with higher conductivity, so as to further improve the conductivity of the positive electrode region.

[0053] In some embodiments, the top cover plate 1 is used to connect to the first tab of the negative electrode of the electrode core. At this time, the top cover plate 1 is used as the negative electrode post, and the electrode post assembly 2 is used as the positive electrode post.

[0054] In some embodiments, a battery is further provided, and the battery includes the top cover structure in any of the above embodiments.

[0055] In some embodiments, an electrical device is further provided, and the electrical device includes the battery in any of the above embodiments.

[0056] In summary, the top cover structure of the present utility model directly connects the top cover plate to the first tab of the electrode core, so that the top cover plate is used as the electrode post, which not only effectively reduces the processing and assembly of the electrode post-related components, simplifies the manufacturing and assembly processes of the top cover assembly. At the same time, the side of the top cover plate without the electrode post can be arranged in the floor trampling deformation area, thus effectively reducing the problem of the floor deformation squeezing the electrode post of the battery cell. And the side surface of the top cover plate without the electrode post can directly serve as a bearing surface and be in direct contact with the floor, thereby effectively increasing the contact area between the top cover plate and the floor, and further reducing the damage to the battery cell caused by the trampling floor deformation. In addition, since there is no electrode post on one side of the top cover plate, there is no need to consider problems such as the sealing ring failure when the electrode post bears force, and it has the advantages of simple structure and low cost, and has the value of popularization and application in the battery technology field.

[0057] The above embodiments are only exemplary explanations of the principles and effects of the present utility model, and are not used to limit this application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in this application should still be covered by the claims of this application.

Claims

1. A top cover structure, characterized in that: It comprises a top cover plate (1), a pole assembly (2) and a lower plastic (3), wherein the pole assembly (2) is arranged on the top cover plate (1), the pole assembly (2) and the top cover plate (1) are insulated and connected, and the top cover plate (1) and the lower plastic (3) are assembled and fixed; The top cover plate (1) is used to be connected to a first pole lug of the pole core, and the pole column assembly (2) is used to be connected to a second pole lug of the pole core, wherein the polarities of the first pole lug and the second pole lug are opposite.

2. The top cover structure according to claim 1, characterized in that: A top cover plate sink (11) is formed on the top of the top cover plate (1), and a top cover plate inner boss (12) is formed on the bottom of the top cover plate (1) at a position corresponding to the top cover plate sink (11), wherein the top cover plate inner boss (12) is used to be connected to a first pole lug of a pole core.

3. The top cover structure according to claim 2, characterized in that: The lower plastic (3) is provided with a lower plastic through hole (31), and the inner boss (12) of the top cover plate is embedded in the lower plastic through hole (31).

4. The top cover structure according to claim 3, characterized in that: The top cover structure further comprises an electrode adapter sheet (4), the electrode adapter sheet (4) being connected to the inner boss (12) of the top cover plate, and the electrode adapter sheet (4) being used to be connected to the first pole lug of the pole core.

5. The top cover structure according to claim 1, characterized in that: The lower plastic (3) is provided with a lower plastic through hole (31) for the first pole tab of the pole core to pass through, so that the first pole tab of the pole core directly passes through the lower plastic through hole (31) to be connected to the top cover plate (1).

6. The top cover structure according to claim 1, characterized in that: A top cover plate sink (11) is formed on the top of the top cover plate (1), an electrode column plate (13) is mounted on the top cover plate sink (11), the electrode column plate (13) is flush with the top cover plate (1), and the top cover plate (1) is connected to a first pole lug of the pole core via the electrode column plate (13).

7. The top cover structure according to claim 6, characterized in that: A through hole (14) is provided on the top cover plate sink (11), and a lower plastic through hole (31) for the first pole ear of the pole core to pass through is provided on the lower plastic (3) at a position corresponding to the through hole (14), so that the first pole ear of the pole core directly passes through the lower plastic through hole (31) and the through hole (14) to be connected to the electrode column plate (13).

8. The top cover structure according to claim 1, characterized in that: The top cover plate (1) is used to be connected to the first pole lug of the positive pole of the pole core; Alternatively, the top cover plate (1) is used to be connected to the first pole lug of the negative pole of the pole core.

9. A battery, characterized in that: It comprises a top cover structure as claimed in any one of claims 1 to 8.

10. An electrical device, characterized in that: Comprising the battery as claimed in claim 9.

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