Battery cell module and battery

Abstract

The utility model provides a battery cell module and a battery, and belongs to the technical field of power batteries. The battery cell module comprises a shell, a battery cell unit, a cover plate assembly and a pole assembly, wherein the battery cell unit is positioned in the shell. The cover plate assembly covers the battery cell unit and is connected with the shell, the cover plate assembly is provided with a first surface and a second surface, and the first surface faces the battery cell unit; the pole assembly is riveted to the cover plate assembly, and the pole assembly penetrates through the first surface of the cover plate assembly and is flanged on the second surface of the cover plate assembly. The battery comprises at least one battery cell module. On the basis of the battery cell structure, the internal space of the battery cell unit is increased by reducing the height of the pole assembly. The diameter of the pole assembly is increased through the arrangement of the turnup of the pole assembly, so that the weldable area of the pole assembly is increased, and welding and overcurrent design of the high-capacity battery cell are facilitated. In addition, the pole assembly is modularly produced and can be used in different battery cell models, so that the development and production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a cell module and a battery. Background Technology

[0002] With the continuous development of technology and the diversification of user needs, new energy power battery technology has also developed rapidly. Among them, lithium batteries, with their advantages of high energy density and long life, are widely used in electric vehicles, backup power systems, and microgrid energy storage systems.

[0003] Existing power lithium batteries typically consist of a core, electrolyte, casing, and cover plate. In terms of cover plate design, two common methods are traditional riveted terminal structure cover plates and injection-molded terminal structure cover plates. Traditional riveted terminal structure cover plates are formed by riveting together rivets, pressure plates, insulating gaskets, and sealing rings. Injection-molded terminal structure cover plates are formed by injection molding the terminals and retaining rings.

[0004] However, current traditional riveted terminal cover plates, after riveting, result in a relatively large height of the terminal post, reducing the internal space of the battery cell. Furthermore, due to the limited diameter of the rivets, the weldable area of ​​the terminal post is small, and the rivet diameter cannot match the overcurrent design of high-capacity battery cells. Meanwhile, injection-molded terminal cover plates have a complex structure, high cost, and require improved production efficiency. Utility Model Content

[0005] This application provides a battery cell module and a battery. Based on the battery cell structure, the internal space of the battery cell unit is increased by reducing the height of the terminal post assembly. The diameter of the terminal post assembly is increased by the flanged design, thereby increasing the weldable area of ​​the terminal post assembly, which is more conducive to the welding and current-carrying design of high-capacity battery cells. Furthermore, the terminal post assembly can be modularly produced and used in different battery cell models, reducing development and production costs.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] The first aspect of this application provides a battery cell module, comprising:

[0008] case;

[0009] The battery cell unit is located inside the housing;

[0010] A cover assembly is disposed on the cell unit and connected to the housing. The cover assembly has a first side and a second side, with the first side facing the cell unit.

[0011] The pole assembly is riveted to the cover plate assembly, and the pole assembly passes through the first side of the cover plate assembly and is flanged onto the second side of the cover plate assembly.

[0012] Based on the above technical solution, the following improvements can be made to this application.

[0013] In one possible implementation, the pole assembly includes a first pole;

[0014] The first pole post includes a first pole post portion and a first gasket. The first pole post portion is located on the first surface of the cover plate assembly, and the first gasket is located on the second surface of the cover plate assembly. The first pole post portion has a first protrusion on its outer peripheral side facing the end of the cover plate assembly. The first pole post portion passes through the first protrusion into the cover plate assembly and is flanged onto the inner edge of the first gasket.

[0015] In one possible implementation, the first pole post further includes: a first insulating part and a first injection molding part;

[0016] The first insulating part is located between the first gasket and the second surface of the cover plate assembly, and the first gasket and the first insulating part overlap;

[0017] The first injection molding part covers the first gasket, and the first pole post is exposed at one end facing the cover plate assembly.

[0018] In one possible implementation, the pole assembly further includes a second pole, with the first and second poles located at opposite ends of the cover plate assembly.

[0019] The second pole includes a second pole portion and a second gasket. The second pole portion is located on the first surface of the cover plate assembly, and the second gasket is located on the second surface of the cover plate assembly. The second pole portion has a second protrusion on its outer peripheral side facing the end of the cover plate assembly. The second pole portion passes through the second protrusion into the cover plate assembly and is flanged onto the inner edge of the second gasket.

[0020] In one possible implementation, the second pole post further includes: a second insulating part and a second injection molding part;

[0021] The second insulating part is located between the second gasket and the second surface of the cover plate assembly, and the second gasket and the second insulating part overlap.

[0022] The second injection section covers the second gasket, and the end of the second pole facing the cover plate assembly is exposed in the second injection section.

[0023] In one possible implementation, the cover assembly includes a stacked substrate and a stop frame, with the stop frame located on the side of the substrate facing the battery cell.

[0024] The stop frame has a stop platform that protrudes from the stop frame and is oriented toward the cell unit.

[0025] In one possible implementation, the stop frame has two first positioning holes for the pole post assembly to pass through. The two first positioning holes are located at both ends of the stop frame, and the two first positioning holes correspond to the first pole post and the second pole post, respectively.

[0026] Two second positioning holes are formed on the substrate for the electrode assembly to pass through. The two second positioning holes are located at both ends of the substrate and correspond to the first electrode and the second electrode, respectively.

[0027] The first positioning hole and the second positioning hole correspond to each other.

[0028] In one possible implementation, the pole assembly further includes: a first sealing ring and a second sealing ring;

[0029] The first pole post is sequentially inserted into the first positioning hole and the second positioning hole, and the first sealing ring is fitted onto the first pole post so that the first pole post and the cover plate assembly are sealed together.

[0030] The second pole post is sequentially inserted through the first positioning hole and the second positioning hole, and the second sealing ring is fitted onto the second pole post so that the second pole post and the cover plate assembly are sealed together.

[0031] In one possible implementation, the stop frame is equipped with an explosion-proof valve;

[0032] The explosion-proof valve is located between the first and second poles;

[0033] The explosion-proof valve is equipped with an explosion-proof membrane, and a third positioning hole is opened on the base plate. The third positioning hole is located between the two second positioning holes. The explosion-proof membrane passes through the third positioning hole and is attached to the explosion-proof valve.

[0034] A second aspect of this application provides a battery comprising at least one of the aforementioned cell modules.

[0035] This application provides a battery cell module and a battery. The battery cell module includes a housing, a battery cell unit, a cover plate assembly, and a terminal assembly. The battery cell unit is located inside the housing. The cover plate assembly covers the battery cell unit and is connected to the housing. The cover plate assembly has a first surface and a second surface, with the first surface facing the battery cell unit. The terminal assembly is riveted to the cover plate assembly, passing through the first surface of the cover plate assembly and flanged onto the second surface. The battery includes at least one of the aforementioned battery cell modules. Thus, this application can increase the internal space of the battery cell unit by reducing the height of the terminal assembly, based on the battery cell structure. The flanged design of the terminal assembly increases its diameter, thereby increasing the weldable area and facilitating welding and current flow design for high-capacity cells. Furthermore, the terminal assembly can be modularly produced and used in different battery cell models, reducing development and production costs. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of a battery cell module provided in one embodiment of this application;

[0038] Figure 2 This is an exploded view of a battery cell module provided in one embodiment of this application;

[0039] Figure 3 for Figure 1 A partial cross-sectional diagram of AA.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100-cell module;

[0042] 200 - Shell; 210 - Cavity;

[0043] 300-cell unit;

[0044] 400-Cover plate assembly; 410-First side; 420-Second side; 430-Base plate; 431-Second positioning hole; 432-Third positioning hole; 440-Stop bracket; 441-Stop platform; 442-First positioning hole; 443-Explosion-proof valve; 444-Explosion-proof membrane;

[0045] 500 - Terminal assembly; 510 - First terminal; 511 - First terminal portion; 5111 - First protruding end; 5112 - First protrusion; 512 - First gasket; 513 - First insulating portion; 514 - First injection molded portion; 515 - First sealing ring; 520 - Second terminal; 521 - Second terminal portion; 5211 - Second protruding end; 5212 - Second protrusion; 522 - Second gasket; 523 - Second insulating portion; 524 - Second injection molded portion; 525 - Second sealing ring. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0047] As described in the background section, current traditional riveted terminal cover plates, after being riveted together, result in a relatively large height of the electrode post, reducing the internal space of the battery cell. Furthermore, due to the limited diameter of the rivets, the weldable area of ​​the electrode post is small, and the rivet diameter cannot be matched to the overcurrent design of high-capacity battery cells. Meanwhile, injection-molded terminal cover plates have a complex structure, high cost, and require improved production efficiency.

[0048] To address the aforementioned technical problems, this application provides a cell module and a battery. The cell module includes a housing, a cell unit, a cover assembly, and a terminal assembly. The cell unit is located within the housing. The cover assembly covers the cell unit and is connected to the housing. The cover assembly has a first surface and a second surface, with the first surface facing the cell unit. The terminal assembly is riveted to the cover assembly, passing through the first surface of the cover assembly and flanged onto the second surface. The battery includes at least one of the aforementioned cell modules. Thus, this application can increase the internal space of the cell unit by reducing the height of the terminal assembly, based on the existing cell structure. The flanged design of the terminal assembly increases its diameter, thereby increasing the weldable area and facilitating welding and current flow design for high-capacity cells. Furthermore, the terminal assembly can be modularly produced and used in different cell models, reducing development and production costs.

[0049] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0050] This application provides a battery cell module and a battery. Based on the battery cell structure, the internal space of the battery cell unit is increased by reducing the height of the terminal post assembly. The diameter of the terminal post assembly is increased by the flanged design, thereby increasing the weldable area of ​​the terminal post assembly, which is more conducive to the welding and current-carrying design of high-capacity battery cells. Furthermore, the terminal post assembly can be modularly produced and used in different battery cell models, reducing development and production costs. The specific structure of the battery cell module and battery provided in this application embodiment is described below with reference to the accompanying drawings.

[0051] refer to Figure 1 This application provides a battery cell module 100 in its first aspect. The battery cell module 100 can be a cylindrical battery cell or a prismatic battery cell; this application does not impose any limitations on this. In this embodiment, the battery cell module 100 may include a housing 200, a battery cell unit 300, a cover plate assembly 400, and a terminal post assembly 500. It is understood that the battery cell unit 300 may be located inside the housing 200, the housing 200 may be located on the outer periphery of the battery cell unit 300, the cover plate assembly 400 may cover the battery cell unit 300, and the cover plate assembly 400 may be connected to the housing 200. In one possible implementation, the side of the cover plate assembly 400 facing the battery cell unit 300 may form a cavity 210 with the inner surface of the housing 200, and the battery cell unit 300 may be located within the cavity 210. In this way, the housing 200 can provide support and protection for the battery cell unit 300.

[0052] Continue to refer to Figure 1 In this specific implementation, in one possible implementation, the cover plate assembly 400 can be rectangular, or the orthographic projection of the cover plate assembly 400 toward the battery cell unit 300 can be rectangular. This application does not limit the shape of the cover plate assembly 400. In this embodiment, the cover plate assembly 400 can be located at one end of the battery cell unit 300, and the cover plate assembly 400 can be fixedly connected to the battery cell unit 300. The cover plate assembly 400 can be fixedly connected to the battery cell unit 300 by welding or other methods. In one possible implementation, the cover plate assembly 400 can have a first surface 410 and a second surface 420. The first surface 410 can face the battery cell unit 300, and the second surface 420 can face away from the battery cell unit 300.

[0053] Continue to refer to Figure 1Based on the above embodiments, the electrode assembly 500 can be fixedly connected to the cover plate assembly 400. In this embodiment, the electrode assembly 500 and the cover plate assembly 400 can be fixedly connected by riveting. In one possible implementation, the electrode assembly 500 can pass through the first surface 410 of the cover plate assembly 400, so that one end of the electrode assembly 500 passing through the cover plate assembly 400 is flanged to the second surface 420 of the cover plate assembly 400. This increases the diameter of the electrode assembly 500, providing a larger weldable area. Furthermore, the flanged flange reduces the height of the electrode assembly 500 provided in this application compared to electrode assemblies 500 in related technologies, thus providing more internal space for the cell unit 300. For example, the electrode assembly 500 in this embodiment is 1mm lower than that in related technologies, and the manufacturing process and structural strength meet the requirements.

[0054] refer to Figure 1 as well as Figure 2 Based on the above embodiments, the pole post assembly 500 may include a first pole post 510, which may be a cylindrical structure. Further, the first pole post 510 may include a first pole post portion 511 and a first gasket 512. The first pole post portion 511 may be located on the first surface 410 of the cover plate assembly 400, while the first gasket 512 may be located on the second surface 420 of the cover plate assembly 400. In one possible implementation, the first pole post portion 511 may have a first protrusion 5112 on its outer peripheral side facing the cover plate assembly 400. The first pole post portion 511 can pass through the cover plate assembly 400 through the first protrusion 5112 and be flanged against the inner edge of the first gasket 512, thereby connecting the first pole post portion 511 and the first gasket 512. Understandably, the end of the first electrode post 511 facing the cover plate assembly 400 can be a first protruding end 5111. The first protruding end 5111 passes through the first surface 410 of the cover plate assembly 400 and protrudes from the second surface 420 of the cover plate assembly 400, while the first protrusion 5112 is located on the outer peripheral side of the first protruding end 5111. The first gasket 512 can be annular, allowing the first protrusion 5112 to overlap with the inner edge of the first gasket 512. This reduces the height of the first electrode post 510 while increasing its diameter, thereby increasing the solderable area of ​​the electrode post assembly 500, which is more conducive to the soldering and current-carrying design of the high-capacity cell unit 300.

[0055] Continue to refer to Figure 1 as well as Figure 2 Based on the above embodiments, the first electrode post 510 may further include a first insulating portion 513 and a first injection-molded portion 514. The first insulating portion 513 and the first injection-molded portion 514 may also be annular. Figure 3 As shown, the first insulating portion 513 can be located between the first gasket 512 and the second surface 420 of the cover plate assembly 400, and the first gasket 512 and the first insulating portion 513 overlap. In addition, the first injection molded portion 514 can cover the first gasket 512, and the end of the first pole portion 511 facing the cover plate assembly 400 can be partially exposed in the first injection molded portion 514. In one possible implementation, the diameter of the first insulating portion 513 can be greater than or equal to the diameter of the first gasket 512, and the diameter of the first injection molding portion 514 can be greater than or equal to the diameters of the first gasket 512 and the first insulating portion 513. In this way, the outer edge of the first gasket 512 can overlap with the first insulating portion 513, and the first injection molding portion 514 can be completely covered on the first gasket 512 and the first insulating portion 513. The first protruding end 5111 of the first pole post portion 511 can be sequentially inserted through the first insulating portion 513, the first gasket 512 and the first injection molding portion 514, and at least part of the first protruding end 5111 is exposed in the first injection molding portion 514.

[0056] Continue to refer to Figure 1 as well as Figure 2 Based on the above embodiments, the pole post assembly 500 may further include a second pole post 520. The first pole post 510 and the second pole post 520 may be located at opposite ends of the cover plate assembly 400, and the second pole post 520 may also be a cylindrical structure. Further, the second pole post 520 may include a second pole post portion 521 and a second gasket 522. The second pole post portion 521 may be located on the first surface 410 of the cover plate assembly 400, while the second gasket 522 may be located on the second surface 420 of the cover plate assembly 400. In one possible implementation, the second pole post portion 521 may have a second protrusion 5212 on its outer peripheral side facing the cover plate assembly 400. The second pole post portion 521 can pass through the cover plate assembly 400 through the second protrusion 5212 and be flanged against the inner edge of the second gasket 522, thereby connecting the second pole post portion 521 and the second gasket 522. Understandably, the end of the second electrode post 521 facing the cover plate assembly 400 can be a second protruding end 5211. The second protruding end 5211 passes through the first surface 410 of the cover plate assembly 400 and protrudes from the second surface 420 of the cover plate assembly 400, while the second protrusion 5212 is located on the outer peripheral side of the second protruding end 5211. The second gasket 522 can be annular, allowing the second protrusion 5212 to overlap with the inner edge of the second gasket 522. This reduces the height of the second electrode post 520 while increasing its diameter, thereby increasing the solderable area of ​​the electrode post assembly 500, which is more conducive to the soldering and current-carrying design of the high-capacity cell unit 300.

[0057] Continue to refer to Figure 1 as well as Figure 2 Based on the above embodiments, the second electrode post 520 may further include a second insulating portion 523 and a second injection-molded portion 524. The second insulating portion 523 and the second injection-molded portion 524 may also be annular. The second insulating portion 523 may be located between the second gasket 522 and the second surface 420 of the cover plate assembly 400, and the second gasket 522 and the second insulating portion 523 overlap. Additionally, the second injection-molded portion 524 may cover the second gasket 522, and one end of the second electrode post portion 521 facing the cover plate assembly 400 may be partially exposed in the second injection-molded portion 524. In one possible implementation, the diameter of the second insulating portion 523 can be greater than or equal to the diameter of the second gasket 522, and the diameter of the second injection molding portion 524 can be greater than or equal to the diameters of the second gasket 522 and the second insulating portion 523. In this way, the outer edge of the second gasket 522 can overlap with the second insulating portion 523, and the second injection molding portion 524 can be completely covered on the second gasket 522 and the second insulating portion 523. The second protruding end 5211 of the second pole portion 521 can be sequentially inserted through the second insulating portion 523, the second gasket 522 and the second injection molding portion 524, and at least part of the second protruding end 5211 is exposed in the second injection molding portion 524.

[0058] Based on the above embodiments, in one possible implementation, the first gasket 512 and the second gasket 522 can be made of steel, and the first gasket 512 and the second gasket 522 can provide a certain support during the riveting process of the pole post assembly 500.

[0059] Continue to refer to Figure 1 as well as Figure 2 Based on the above embodiments, the cover assembly 400 may include a substrate 430 and a stop frame 440. In this embodiment, the substrate 430 and the stop frame 440 may be stacked in the thickness direction of the cover assembly 400, and the stop frame 440 may be located on the side of the substrate 430 facing the battery cell unit 300, i.e., the cover body may be located on the stop frame 440. It is understood that the cover assembly 400 may be fixedly connected to the housing 200, thereby providing further protection for the battery cell unit 300. In one possible implementation, the stop frame 440 may have a stop platform 441. This embodiment does not limit the number of stop platforms 441. The stop platform 441 may protrude from the stop frame 440 and face the battery cell unit 300. The stop platform 441 can be used to fix the cover assembly 400, thereby maintaining the structural integrity and functional stability of the battery cell module 100.

[0060] Continue to refer to Figure 2Based on the above embodiments, the stop frame 440 may have a first positioning hole 442, and the substrate 430 may have a second positioning hole 431. In one possible implementation, the number of the first positioning hole 442 and the second positioning hole 431 may be at least two. This application does not limit the number of the first positioning hole 442 and the second positioning hole 431. In this embodiment, two first positioning holes 442 and two positioning holes 431 are used as examples. The two first positioning holes 442 are located at both ends of the stop frame 440, and the two first positioning holes 442 correspond to the first pole post 510 and the second pole post 520, respectively. Correspondingly, the two second positioning holes 431 are located at both ends of the substrate 430, and the two second positioning holes 431 correspond to the first pole post 510 and the second pole post 520, respectively. It is understood that the first positioning hole 442 and the second positioning hole 431 correspond to each other. Thus, the first electrode post 510 can pass through one of the first positioning holes 442 of the stop frame 440, and then through one of the second positioning holes 431 of the substrate 430. The second electrode post 520 can pass through the other first positioning hole 442 of the stop frame 440, and then through the other second positioning hole 431 of the substrate 430. The electrode post assembly 500 can be sequentially inserted into the first positioning hole 442 and the second positioning hole 431 and fixedly connected to the cover plate assembly 400 by riveting or other means, and the electrode post assembly 500 can be electrically connected to the battery cell unit 300.

[0061] Continue to refer to Figure 2Based on the above embodiments, the pole post assembly 500 may further include a first sealing ring 515 and a second sealing ring 525. The first protruding end 5111 of the first pole post portion 511 can sequentially pass through the first positioning hole 442 and the second positioning hole 431, thereby fitting the first sealing ring 515 onto the first protruding end 5111 of the first pole post portion 511. This allows the first sealing ring 515 to fill the gap between the first pole post portion 511 and the cover plate assembly 400, thus achieving a sealed connection between the first pole post 510 and the cover plate assembly 400. Correspondingly, the first protruding end 5111 of the second pole post portion 521 can also sequentially pass through the first positioning hole 442 and the second positioning hole 431, thereby fitting the second sealing ring 525 onto the first protruding end 5111 of the second pole post portion 521. This allows the second sealing ring 525 to fill the gap between the second pole post portion 521 and the cover plate assembly 400, thus achieving a sealed connection between the second pole post 520 and the cover plate assembly 400. In one possible implementation, the first sealing ring 515 may be located on the side of the first insulating portion 513 facing away from the first gasket 512, and the first sealing ring 515 may also be annular in shape. The diameter of the first sealing ring 515 may be greater than or equal to the diameter of the first protruding end 5111 of the first pole post portion 511, so that the first sealing ring 515 can be fitted onto the first protruding end 5111 of the first pole post portion 511. Correspondingly, the second sealing ring 525 may also be located on the side of the second insulating portion 523 facing away from the second gasket 522, and the second sealing ring 525 may also be annular in shape. The diameter of the second sealing ring 525 may be greater than or equal to the diameter of the first protruding end 5111 of the second pole post portion 521, so that the second sealing ring 525 can be fitted onto the first protruding end 5111 of the second pole post portion 521.

[0062] Continue to refer to Figure 2 Based on the above embodiments, an explosion-proof valve 443 may be provided on the stop frame 440. The explosion-proof valve 443 may be located between the first pole 510 and the second pole 520. In one possible implementation, an explosion-proof membrane 444 may be provided on the explosion-proof valve 443. A third positioning hole 432 may be provided on the substrate 430, and the third positioning hole 432 may be located between two second positioning holes 431, so that the explosion-proof membrane 444 can pass through the third positioning hole 432 and adhere to the explosion-proof valve 443. It is understood that the dimensions of the third positioning hole 432, the explosion-proof membrane 444, and the explosion-proof valve 443 may be the same. The explosion-proof valve 443 can be in an open state when the internal pressure of the battery module 100 is too high, to release the internal pressure and prevent the housing 200 from rupturing or exploding.

[0063] A second aspect of this application provides a battery (not shown in the figures), which may include at least one of the aforementioned cell modules 100. In some embodiments of this application, the battery may include a plurality of stacked cell modules 100, or the battery may include a battery pack formed directly by grouping a plurality of stacked cell modules 100. It is understood that this battery can be applied to battery systems in the fields of energy storage, battery swapping, and power.

[0064] In this embodiment, based on the cell structure, the internal space of the cell unit 300 is increased by reducing the height of the terminal assembly 500. The flanged design of the terminal assembly 500 increases its diameter, thereby increasing the solderable area and facilitating soldering and current flow design for high-capacity cells. Furthermore, the terminal assembly 500 can be modularly produced, allowing it to be used in different cell models, reducing development and production costs.

[0065] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0066] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0067] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0068] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0069] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery cell module, characterized in that, include: case; A battery cell unit, wherein the battery cell unit is located within the housing; A cover plate assembly is disposed on the battery cell unit and connected to the housing, the cover plate assembly having a first surface and a second surface, the first surface facing the battery cell unit; A pole assembly, which is riveted to the cover plate assembly, extends through the first surface of the cover plate assembly and is flanged onto the second surface of the cover plate assembly.

2. The battery cell module according to claim 1, characterized in that, The electrode assembly includes a first electrode; The first pole post includes a first pole post portion and a first gasket. The first pole post portion is located on the first surface of the cover plate assembly, and the first gasket is located on the second surface of the cover plate assembly. The first pole post portion has a first protrusion on its outer peripheral side facing the cover plate assembly. The first pole post portion passes through the first protrusion into the cover plate assembly and is flanged onto the inner edge of the first gasket.

3. The cell module according to claim 2, characterized in that, The first pole post further includes: a first insulating part and a first injection molding part; The first insulating portion is located between the first gasket and the second surface of the cover plate assembly, and the first gasket and the first insulating portion overlap; The first injection molding portion covers the first gasket, and the first pole portion is partially exposed at one end facing the cover plate assembly.

4. The battery cell module according to claim 2, characterized in that, The pole assembly further includes a second pole, wherein the first pole and the second pole are respectively located at both ends of the cover plate assembly; The second pole includes a second pole portion and a second gasket. The second pole portion is located on the first surface of the cover plate assembly, and the second gasket is located on the second surface of the cover plate assembly. The second pole portion has a second protrusion on its outer peripheral side facing the cover plate assembly. The second pole portion passes through the second protrusion into the cover plate assembly and is flanged onto the inner edge of the second gasket.

5. The battery cell module according to claim 4, characterized in that, The second pole also includes: a second insulating part and a second injection molding part; The second insulating portion is located between the second gasket and the second surface of the cover plate assembly, and the second gasket and the second insulating portion overlap; The second injection molding portion covers the second gasket, and one end of the second pole portion facing the cover plate assembly is exposed in the second injection molding portion.

6. The cell module according to claim 5, characterized in that, The cover plate assembly includes a substrate and a stop frame stacked together, the stop frame being located on the side of the substrate facing the battery cell unit; The stop frame has a stop platform, which protrudes from the stop frame and is positioned toward the battery cell unit.

7. The cell module according to claim 6, characterized in that, The stop frame has two first positioning holes for the pole post assembly to pass through. The two first positioning holes are located at both ends of the stop frame, and the two first positioning holes correspond to the first pole post and the second pole post, respectively. The substrate has two second positioning holes for the electrode assembly to pass through. The two second positioning holes are located at both ends of the substrate and correspond to the first electrode and the second electrode, respectively. The first positioning hole and the second positioning hole correspond to each other.

8. The cell module according to claim 7, characterized in that, The pole assembly further includes: a first sealing ring and a second sealing ring; The first pole post is sequentially inserted through the first positioning hole and the second positioning hole, and the first sealing ring is sleeved on the first pole post so that the first pole post and the cover plate assembly are sealed together. The second pole post is sequentially inserted into the first positioning hole and the second positioning hole, and the second sealing ring is fitted onto the second pole post so that the second pole post and the cover plate assembly are sealed together.

9. The cell module according to claim 8, characterized in that, The stop frame is equipped with an explosion-proof valve; The explosion-proof valve is located between the first pole and the second pole; The explosion-proof valve is provided with an explosion-proof membrane, and the substrate is provided with a third positioning hole. The third positioning hole is located between the two second positioning holes, and the explosion-proof membrane passes through the third positioning hole and is attached to the explosion-proof valve.

10. A battery, characterized in that, It includes at least one battery cell module as described in any one of claims 1-9 above.

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