Cover plate assembly, battery, battery pack, and vehicle

Abstract

The application provides a cover plate assembly, a battery, a battery pack and a vehicle. The cover plate assembly is applied to the battery and comprises a base and a plurality of pole columns. The plurality of pole columns comprises a first pole column and a second pole column. The base is provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are arranged at intervals along a first direction. The first mounting hole and the second mounting hole pass through the base along a second direction perpendicular to the first direction. The first pole column is mounted to the first mounting hole, and the second pole column is mounted to the second mounting hole. The first pole column is provided with a liquid injection hole, and the liquid injection hole passes through the cover plate assembly along the second direction. By arranging the liquid injection hole on the first pole column, the space occupation of the base is reduced, so that the volume of the second pole column can be increased, and the overcurrent capacity of the cover plate assembly is improved. At the same time, since a plurality of pole columns are arranged, different pole columns can selectively play the same or different roles, for example, overcurrent, sampling and the like, and the functional richness of the cover plate assembly is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a cover assembly, a battery, a battery pack, and a vehicle. Background Technology

[0002] With the gradual development of vehicle technology, new energy vehicles are becoming increasingly popular. As the power component of new energy vehicles, the performance requirements for batteries are gradually increasing. The cover plate assembly is a crucial component of the battery, including parts such as the terminals. Currently, to inject electrolyte into the battery, the cover plate assembly has injection holes that connect to the internal cell space. These injection holes occupy space within the cover plate assembly, resulting in smaller terminals, reduced terminal volume, and decreased current-carrying capacity, leading to higher resistance in the cover plate assembly. Utility Model Content

[0003] This application provides a cover assembly, a battery, a battery pack, and a vehicle to solve related technical problems.

[0004] A first aspect of this application provides a cover plate assembly for use in a battery, comprising: a base and a plurality of terminals; the plurality of terminals including a first terminal and a second terminal; the base having a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole being spaced apart along a first direction; the first mounting hole and the second mounting hole passing through the base along a second direction perpendicular to the first direction; the first terminal being mounted to the first mounting hole, and the second terminal being mounted to the second mounting hole; the first terminal being having an injection hole, the injection hole passing through the cover plate assembly along the second direction.

[0005] By placing the injection port on the first electrode, the space occupied by the base is reduced, allowing for a larger volume of the second electrode and improving the flow capacity of the cover assembly. Simultaneously, the presence of multiple electrodes allows different electrodes to selectively perform the same or different functions, such as flow control or sampling, thus enhancing the functionality of the cover assembly.

[0006] Furthermore, the pole includes a main body and a first connecting portion and a second connecting portion respectively disposed at both ends of the main body in the second direction. In the first direction, the first connecting portion and / or the second connecting portion extends beyond the main body. The first connecting portion or the second connecting portion has a large volume, which increases the flow area and improves the flow capacity of the cover plate assembly.

[0007] Furthermore, the first connecting portion is used to connect the battery cell, and in the first direction, the second connecting portion extends beyond the first connecting portion. The volume of the first connecting portion is further increased, thereby further increasing the current-carrying area and enhancing the current-carrying capacity of the cover assembly.

[0008] Furthermore, the second connecting portion is located on one side of the base and has a gap with the base. The cover assembly also includes an insulating member installed into the gap, the insulating member abutting against the second connecting portion and the base. By providing the insulating member, internal short circuits in the cover assembly are avoided, thus improving the safety of the cover assembly.

[0009] Furthermore, the insulating member includes a first portion and a second portion, the first portion abutting against the second connecting portion and the base; the second portion extends from the first portion toward the first connecting portion and surrounds the main body. Dividing the insulating member into two parts, one part abutting between the second connecting portion and the base, and the other part surrounding the main body, improves the protective effect of the insulating member on the pole post, further enhancing the safety of the cover plate assembly.

[0010] Furthermore, the base includes a substrate and an insulating support mounted to one side of the substrate. The insulating support extends from the center away from the substrate to form a partition plate. The first pole and the second pole are disposed on both sides of the partition plate in the first direction. By using the partition plate to separate the first pole and the second pole, short circuits are avoided, thereby enhancing the safety of the cover plate assembly.

[0011] Furthermore, the insulating support is provided with a pair of legs at each end in the first direction, and the legs extend from the insulating support away from the substrate. By providing the legs, the installation strength of the cover plate assembly is improved.

[0012] Furthermore, the first terminal is used to sample the voltage of the battery, and the second terminal is used to allow the current to flow through the battery. In the first direction, the length of the first terminal is shorter than that of the second terminal. Since the first terminal is used for sampling, reducing its length allows for more space for the second terminal while maintaining functionality. The second terminal is used for current flow; increasing its length increases its current-carrying area and improves the safety of the cover assembly.

[0013] A second aspect of this application provides a battery including a casing, a battery cell, and the aforementioned cover assembly. The cover assembly is mounted to an end of the casing, and a battery cell space is provided within the casing. The electrolyte injection hole is connected to the battery cell space. Because the current-carrying capacity of the cover assembly is enhanced, the current-carrying capacity of the battery is also improved, reducing heat generation during charging and discharging and increasing battery safety.

[0014] Furthermore, the battery cell includes a first tab, which has a connecting surface facing the first terminal post. The first tab is provided with a communicating recess extending through the connecting surface, and the communicating recess is aligned and communicating with the electrolyte injection hole. This surface connection increases the connection area between the first tab and the first terminal post, further improving the battery's current-carrying capacity. Simultaneously, by providing the communicating recess, while maintaining a larger connection area, the electrolyte injection efficiency is increased, thereby improving the battery's manufacturing efficiency.

[0015] A third aspect of this application provides a battery pack including the battery described above. Due to the improved safety of the battery, the reliability of the battery pack is increased.

[0016] A fourth aspect of this application provides a vehicle including the aforementioned battery pack. The increased reliability of the battery pack improves the stability of the vehicle.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0019] Figure 1 This is a structural diagram of a cover plate assembly according to an exemplary embodiment of this application;

[0020] Figure 2 yes Figure 1 Structural diagram of the middle cover plate assembly from the rear view;

[0021] Figure 3 yes Figure 1 Exploded perspective view of the middle cover plate assembly;

[0022] Figure 4 This is a schematic diagram of the structure of a battery in an exemplary embodiment of this application;

[0023] Figure 5 This is a cross-sectional schematic diagram of a battery according to an exemplary embodiment of this application;

[0024] Figure 6 This is a structural diagram of a battery from a top view in a supplementary embodiment of this application;

[0025] Figure 7 This is one of the structural diagrams of a cover plate assembly in the supplementary embodiments of this application;

[0026] Figure 8 This is the second structural diagram of a cover plate assembly in the supplementary embodiments of this application.

[0027] Reference numerals: Cover assembly - 1; Base - 10; First mounting hole - 101; Second mounting hole - 102; Substrate - 11; Insulating bracket - 12; Separator plate - 121; Support leg - 122; Terminal post - 20; First terminal post - 201; Second terminal post - 202; Main body - 21; First connecting part - 22; Second connecting part - 23; Injection hole - 30; Insulating component - 40; First insulating component - 401; Second insulating component - 402; First part - 41; Second part - 42; Housing - 50; Cell space - 500; Cell - 60; First tab - 61; Connecting surface - 611; Communicating recess - 612; First solder mark - 613; Second tab - 62; Second solder mark - 621; Middle tab - 63; Battery - 70; Sub-battery - 71; Middle cover plate - 80; Middle terminal post - 81. Detailed Implementation

[0028] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0029] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0030] Currently, batteries have electrolyte injection holes on the cover assembly to inject electrolyte into the battery. These injection holes occupy space in the cover assembly, reducing the space available for the terminals, decreasing the current-carrying capacity of the cover assembly, and resulting in higher resistance. This application provides a cover assembly, a battery, a battery pack, and a vehicle to address these technical problems.

[0031] like Figure 1 and Figure 2 As shown, a first aspect of this application provides a cover assembly 1. The cover assembly 1 is applied to a battery and includes a base 10 and a plurality of terminals 20. The plurality of terminals 20 includes a first terminal 201 and a second terminal 202. The base 10 is provided with a first mounting hole 101 and a second mounting hole 102, which are spaced apart along a first direction X.

[0032] The first mounting hole 101 and the second mounting hole 102 pass through the base 10 along a second direction Y perpendicular to the first direction X. The first electrode post 201 is installed into the first mounting hole 101. The second electrode post 202 is installed into the second mounting hole 102. The first electrode post 201 is provided with an injection hole 30. The injection hole 30 passes through the cover plate assembly along the second direction.

[0033] By placing the injection hole 30 on the first electrode post 201, the space occupied by the base 10 is reduced, allowing the volume of the second electrode post 202 to be increased, thus improving the flow capacity of the cover plate assembly 1. At the same time, since multiple electrodes post 20 are provided, different electrodes post 20 can selectively perform the same or different functions, such as flow control and sampling, thereby improving the functional richness of the cover plate assembly 1.

[0034] In this embodiment, the first terminal 201 is a sampling terminal used to collect the battery voltage. The second terminal 202 is a current-carrying terminal used to allow the battery current to pass through. When the first terminal 201 is the positive electrode, its material is aluminum. When the first terminal 201 is the negative electrode, its material is copper. In the first direction X, the length of the first terminal 201 is less than that of the second terminal 202.

[0035] Since the first terminal 201 is used for sampling, reducing its length allows for more space for the second terminal 202 while maintaining functionality. The second terminal 202 is used for current flow; increasing its length increases the current flow area of ​​the first terminal 201, thus improving the safety of the cover assembly 1.

[0036] Please refer to the following: Figure 3 As shown, the base 10 includes a substrate 11 and an insulating support 12. The insulating support 12 is mounted to one side of the substrate 11. The substrate 11 is provided with a first through hole 111 and a second through hole 112. The first through hole 111 is used to form a first mounting hole 101. The second through hole 112 is used to form a second mounting hole 102. The substrate 11 may be made of 3003 aluminum and is formed by machining and stamping.

[0037] An insulating support 12 extends from the center away from the substrate 11 to form a partition plate 121. A first pole post 201 and a second pole post 202 are disposed on both sides of the partition plate 121 in the first direction X. The partition plate 121 separates the first pole post 201 and the second pole post 202 to avoid short circuits, thereby enhancing the safety of the cover plate assembly 1.

[0038] The insulating support 12 has a pair of legs 122 at each end in the first direction X for connecting to the battery casing. The legs 122 extend from the insulating support 12 away from the substrate 11. The legs 122 are used to connect to the battery casing, and the installation strength of the cover assembly 1 is improved by providing the legs 122.

[0039] The insulating bracket 12 is provided with a third through hole 123 and a fourth through hole 124. The first through hole 111 and the third through hole 123 are aligned and connected to form a first mounting hole 101. The second through hole 112 and the fourth through hole 124 are aligned and connected to form a second mounting hole 102.

[0040] The insulating bracket 12 has shrinkage holes 125 at the support legs 122. The insulating bracket 12 is usually made of rubber material. By providing shrinkage holes 125, the solid portion of the rubber can be reduced, thus reducing thermal shrinkage of the insulating bracket 12 during the manufacturing process. The insulating bracket 12 can be injection molded.

[0041] The first pole post 201 and the second pole post 202 may have the same or different structures. The pole post 20 includes a main body 21, a first connecting portion 22, and a second connecting portion 23. The first connecting portion 22 and the second connecting portion 23 are disposed at both ends of the main body 21 in the second direction Y. In the first direction X, at least one of the first connecting portion 22 and the second connecting portion 23 extends beyond the main body 21. The first connecting portion 22 or the second connecting portion 23 has a larger volume, increasing the flow area and improving the flow capacity of the cover plate assembly 1.

[0042] The first connecting portion 22 is used to connect the battery cells. The second connecting portion 23 is used for the battery to make electrical connections to external parts. In the first direction X, the second connecting portion 23 extends beyond the first connecting portion 22. The volume of the first connecting portion 22 is further increased, thereby further increasing the current-carrying area and enhancing the current-carrying capacity of the cover assembly 1.

[0043] The second connecting portion 23 is located on one side of the base 10 and has a gap between it and the base 10. The cover plate assembly 1 also includes an insulating member 40 installed into the gap. The insulating member 40 abuts against the second connecting portion 23 and the base 10. The insulating member 40 includes a first insulating member 401 and a second insulating member 402. The first insulating member 401 is connected to the first terminal post 201. The second insulating member 402 is connected to the second terminal post 202.

[0044] By providing an insulating component 40, the base 10 and the second connecting part 23 can be isolated, thus preventing a short circuit inside the cover assembly 1 and improving the safety of the cover assembly 1.

[0045] The insulating member 40 includes a first portion 41 and a second portion 42. The first portion 41 abuts against the second connecting portion 23 and the base 10. The second portion 42 extends from the first portion 41 toward the first connecting portion 22 and is disposed around the body 21.

[0046] The insulating component 40 is divided into two parts: one part abuts between the second connecting part 23 and the base 10, and the other part surrounds the main body 21 to block the main body 21 from the base 10, thereby improving the protective effect of the insulating component 40 on the pole post 20 and further improving the safety of the cover plate assembly 1.

[0047] The insulating component 40 can be made of PPS (Polyphenylene Sulfide), which can be filled between the pole post 20 and the base 10 by hot flow injection molding to provide insulation and sealing, thereby improving the safety of the cover assembly 1.

[0048] Please refer to the following: Figure 4 and Figure 5 As shown, a second aspect of this application provides a battery 70, including a housing 50, a battery cell 60, and the aforementioned cover assembly 1. The cover assembly is mounted to the end of the housing 50. A battery cell space 500 is provided inside the housing 50. A liquid injection hole 30 communicates with the battery cell space 500.

[0049] As the overcurrent capacity of the cover plate assembly 1 is enhanced, the overcurrent capacity of the battery 70 is also improved, reducing heat generation during charging and discharging and increasing the safety of the battery 70.

[0050] The battery cell 60 includes a first tab 61 and a second tab 62. The first tab 61 includes a connecting surface 611 facing the first terminal post 201. The first tab 61 is provided with a communicating recess 612 passing through the connecting surface 611, and the communicating recess 612 is aligned and communicating with the injection hole 30. The communicating recess 612 can be a hole structure or a groove structure, and the specific type is not limited, as long as it passes through the connecting surface 611. The communicating recess 612 can be circular, rectangular, trapezoidal, rhomboid, etc., and the specific shape is not limited.

[0051] By using surface connections to increase the connection area between the first tab 61 and the first terminal post 201, the current-carrying capacity of the battery is further improved. At the same time, by providing the connecting recess 612, while maintaining a large connection area, the electrolyte injection efficiency is increased, thereby improving the manufacturing efficiency of the battery 70.

[0052] The first electrode tab 61 and the first electrode post 201 can be connected by laser welding or ultrasonic welding. The second electrode tab 62 and the second electrode post 202 can also be connected by laser welding. The first electrode tab 61 is provided with a first weld mark 613. The first weld mark 613 is provided on both sides of the communicating recess 612. The second electrode tab 62 is provided with a second weld mark 621.

[0053] The type of battery 70 is not limited. In one embodiment, the battery 70 is a two-cell battery. The battery 70 includes two sub-cells 71. The two sub-cells 71 are connected by an intermediate cover plate 80. The cell 60 also includes an intermediate tab 63, which is electrically connected to the intermediate terminal post 81 of the intermediate cover plate 80.

[0054] Please refer to the following: Figure 6 As shown, the sub-battery 71 includes a sub-casing 711. In one embodiment, an explosion-proof valve 712 and a liquid injection hole 30 are disposed in the sub-casing 711 to avoid the cover plate assembly 1, thereby increasing the volume of the terminal post 20 and improving the current-carrying capacity of the cover plate assembly.

[0055] Please refer to the following: Figure 7 and Figure 8 As shown, in some embodiments, the first electrode 201 and the second electrode 202 are located on the same side of the injection port 30. The injection port 30 avoids forming an obstruction between the first electrode 201 and the second electrode 202, allowing the first electrode 201 and the second electrode 202 to extend close together to increase their length and improve the flow capacity of the cover assembly.

[0056] In other embodiments, the number of injection holes 30 may also be two. The first electrode 201 and the second electrode 202 are located between the two injection holes 30, avoiding obstruction between the first electrode 201 and the second electrode 202, which can increase the length of the first electrode 201 and the second electrode 202 and improve the flow capacity of the cover plate assembly.

[0057] A third aspect of this application provides a battery pack including the battery described above. Due to the improved safety of the battery, the reliability of the battery pack is increased.

[0058] A fourth aspect of this application provides a vehicle including the aforementioned battery pack. The increased reliability of the battery pack improves the stability of the vehicle. The vehicle described in this application can be an electric vehicle or a hybrid vehicle, and the specific type is not limited.

[0059] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A cover plate assembly used in a battery, characterized in that, include: A base and multiple pole posts; the multiple pole posts include a first pole post and a second pole post; The base is provided with a first mounting hole and a second mounting hole, which are spaced apart along a first direction. The first mounting hole and the second mounting hole pass through the base along a second direction perpendicular to the first direction; the first pole post is mounted to the first mounting hole, and the second pole post is mounted to the second mounting hole; The first electrode post is provided with an injection hole, which passes through the cover plate assembly along the second direction.

2. The cover plate assembly according to claim 1, characterized in that, The pole includes a main body and a first connecting portion and a second connecting portion respectively disposed at both ends of the main body in the second direction, wherein in the first direction, the first connecting portion and / or the second connecting portion extends beyond the main body.

3. The cover plate assembly according to claim 2, characterized in that, The first connecting portion is used to connect the battery cell, and in the first direction, the second connecting portion extends beyond the first connecting portion.

4. The cover plate assembly according to claim 2, characterized in that, The second connecting portion is located on one side of the base and has a gap between it and the base. The cover plate assembly also includes an insulating member installed into the gap, the insulating member abutting against the second connecting portion and the base.

5. The cover plate assembly according to claim 4, characterized in that, The insulating element includes a first portion and a second portion, the first portion abutting against the second connecting portion and the base; the second portion extends from the first portion toward the first connecting portion and surrounds the body.

6. The cover plate assembly according to claim 1, characterized in that, The base includes a substrate and an insulating support mounted to one side of the substrate. The insulating support extends from the middle away from the substrate to form a partition plate. The first pole post and the second pole post are disposed on both sides of the partition plate in the first direction.

7. The cover plate assembly according to claim 6, characterized in that, The insulating support has a pair of legs at each end in the first direction, and the legs extend from the insulating support away from the substrate.

8. The cover plate assembly according to claim 1, characterized in that, The first terminal is used to collect the voltage of the battery, and the second terminal is used to allow the current to pass through the battery. In the first direction, the length of the first terminal is shorter than that of the second terminal.

9. A battery, characterized in that, include: The housing, the battery cell, and the cover plate assembly as described in any one of claims 1-8, wherein the cover plate assembly is installed at the end of the housing, the housing has a battery cell space, and the injection hole is connected to the battery cell space.

10. The battery according to claim 9, characterized in that, The battery cell includes a first tab, the first tab having a connecting surface facing the first terminal post, the first tab having a communicating recess passing through the connecting surface, the communicating recess being aligned and communicating with the injection hole.

11. A battery pack, characterized in that, include: The battery as described in claim 9 or claim 10.

12. A vehicle, characterized in that, include: The battery pack as claimed in claim 11.

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