Battery cell cover plate assembly, battery and power equipment

Abstract

The utility model discloses a battery cell cover plate assembly, a battery and power equipment, the battery cell cover plate assembly comprises a cover plate, the cover plate is provided with a communication hole, and the inner wall of the communication hole is provided with a first thread; the polar column is detachably connected with the cover plate, the polar column is accommodated in the communicating hole, and a second thread matched with the first thread is formed on the polar column; the tab is placed on the pole and located between the pole and the cover plate, and the tab abuts against the outer peripheral wall of the cover plate and the outer peripheral wall of the pole so as to limit the movement of the tab relative to the cover plate. According to the battery cell cover plate assembly, the connection of the pole and the cover plate is realized through the matching of the first thread and the second thread, the tabs are respectively propped against the peripheral wall of the cover plate and the peripheral wall of the pole so as to limit the movement of the tabs relative to the cover plate, welding is not needed in the process of connecting the tabs, the pole and the cover plate, and the cost is reduced. The risks of short circuit failure and the like caused by the fact that metal chips enter the battery cell in the welding process are effectively prevented, and the production yield of the battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cell cover assembly, a battery, and a power device. Background Technology

[0002] In related technologies, the tabs and cover plates are connected by laser welding, which is prone to poor welding, resulting in over-welding or incomplete welding, affecting insulation and overcurrent performance. In addition, welding slag can easily fall into the cell and cause short circuits. Existing technologies also use butterfly welding or direct welding to connect the tabs and cover plates, which requires the addition of protective plates, connecting plates and other structural components between the tabs and cover plates, occupying internal space of the cell, reducing the utilization rate of internal space of the cell, and increasing internal resistance and manufacturing costs. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide a battery cell cover assembly. According to this utility model, the battery cell cover assembly achieves the connection between the electrode post and the cover plate through the engagement of a first thread and a second thread. The electrode tabs respectively abut against the outer peripheral walls of the cover plate and the outer peripheral walls of the electrode post, thereby restricting the movement of the electrode tabs relative to the cover plate. No welding is required during the connection process of the electrode tabs, electrode post, and cover plate, effectively preventing the risk of short circuit failure caused by metal shavings entering the battery cell during welding, and improving the production yield of the battery.

[0004] This application also proposes a battery having the aforementioned cover assembly.

[0005] This application also proposes a power device having the aforementioned battery.

[0006] The battery cell cover assembly according to this utility model includes: a cover plate, wherein a through hole is provided on the cover plate, and a first thread is formed on the inner wall of the through hole; a terminal post, wherein the terminal post is detachably connected to the cover plate, the terminal post is received in the through hole, and a second thread is formed on the terminal post that mates with the first thread; and a tab, wherein the tab is placed on the terminal post and located between the terminal post and the cover plate, and the tab abuts against the outer peripheral wall of the cover plate and the outer peripheral wall of the terminal post respectively, so as to restrict the movement of the tab relative to the cover plate.

[0007] According to this utility model, the cell cover assembly connects the terminal post and the cover plate through the engagement of the first thread and the second thread. The electrode tab is disposed between the cover plate and the terminal post, and the electrode tab abuts against the outer peripheral wall of the cover plate and the outer peripheral wall of the terminal post, thereby restricting the movement of the electrode tab relative to the cover plate and realizing the connection between the electrode tab and the cover plate. No welding is required in the process of connecting the electrode tab, the terminal post and the cover plate, thus avoiding and effectively preventing the risk of short circuit failure caused by metal shavings entering the cell during the welding process, thereby improving the production yield of the battery.

[0008] According to some embodiments of the present invention, the pole post includes: a base plate having a mating surface formed on the base plate to mate with the pole lug; and an assembly part disposed on and protruding from the mating surface, the assembly part being adapted to extend into the communicating hole, and at least a portion of the outer peripheral wall of the assembly part having a second thread formed thereon.

[0009] According to some embodiments of the present invention, the cover plate includes: a cover plate body having a through hole formed thereon, which is suitable for at least part of the assembly part to pass through; and a top cover detachably connected to the assembly part, having a connecting hole formed thereon opposite to the through hole.

[0010] According to some embodiments of the present invention, the cover plate further includes: a first insulating member, at least a portion of the first insulating member being sleeved on at least a portion of the outer periphery of the top cover, and at least another portion of the first insulating member being located between the top cover and the cover plate body.

[0011] According to some embodiments of the present invention, the cover plate further includes a second insulating member, which is disposed on the side of the cover plate body away from the top cover and located between the bottom plate and the cover plate body.

[0012] According to some embodiments of the present invention, the second insulating member has a groove on the side opposite to the cover plate body that is suitable for receiving the bottom plate, and the electrode tabs abut against the inner wall of the groove and the mating surface respectively to restrict the movement of the electrode tabs relative to the cover plate.

[0013] According to some embodiments of the present invention, the edge of the sidewall of the groove portion is formed with a rounded chamfer.

[0014] According to some embodiments of the present invention, the cover plate assembly further includes a sealing element, which is sleeved on at least a portion of the assembly portion.

[0015] The battery according to this utility model is briefly described below.

[0016] The battery according to this utility model is provided with the cell cover plate assembly described in any one of the above embodiments. Since the battery according to this utility model is provided with the cell cover plate assembly described in any one of the above embodiments, the battery according to this utility model has better safety and higher reliability.

[0017] The following is a brief description of the power equipment according to this utility model.

[0018] The power device according to this utility model is equipped with a battery as described in any of the above embodiments. Since the power device according to this utility model is equipped with a battery as described in any of the above embodiments, the power device according to this application has good safety and high reliability.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of a battery cell cover assembly according to an embodiment of the present invention;

[0022] Figure 2 This is an assembly diagram of a battery cell cover assembly according to an embodiment of the present invention.

[0023] Figure label:

[0024] 100. Cell cover plate assembly;

[0025] 11. Pole tab; 12. Cover plate body; 13. Top cover; 101. Connecting hole; 14. First insulating component;

[0026] 15. Second insulating component; 102. Through hole; 103. Mating hole;

[0027] 21. Base plate; 22. Assembly part; 23. Seal; 24. Mating surface; 221. Second thread. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In related technologies, the tabs and cover plates are connected by laser welding, which is prone to poor welding, resulting in over-welding or incomplete welding, affecting insulation and overcurrent performance. In addition, welding slag can easily fall into the cell and cause short circuits. Existing technologies also use butterfly welding or direct welding to connect the tabs and cover plates, which requires the addition of protective plates, connecting plates and other structural components between the tabs and cover plates, occupying internal space of the cell, reducing the utilization rate of internal space of the cell, and increasing internal resistance and manufacturing costs.

[0030] The following is for reference. Figures 1-2 This invention describes a cell cover assembly according to an embodiment of the present invention.

[0031] The battery cell cover assembly 100 of this utility model includes: a cover plate, a terminal post, and a tab 11. The cover plate is provided with a connecting hole 101, and a first thread is formed on the inner wall of the connecting hole 101. The terminal post is detachably connected to the cover plate, and is housed in the connecting hole 101. A second thread 221 is formed on the terminal post to cooperate with the first thread. The tab 11 is placed on the terminal post and is located between the terminal post and the cover plate. The tab 11 abuts against the outer peripheral wall of the cover plate and the outer peripheral wall of the terminal post to restrict the movement of the tab 11 relative to the cover plate.

[0032] In some specific embodiments, the cell cover assembly 100 consists of a cover plate, a terminal post, and a tab 11. A through hole 101 extending through the thickness direction is formed on the cover plate. A first thread is formed on the inner wall of the through hole 101. The terminal post is received within the through hole 101 of the cover plate, and a second thread 221 is formed on its outer peripheral wall that mates with the first thread on the inner wall of the through hole 101. This achieves the connection between the terminal post and the cover plate. The threaded connection replaces the traditional welding process, simplifying the assembly process, reducing manufacturing costs and complexity, and also reducing... To address potential issues during the welding process, such as the risk of short circuits caused by falling weld slag, the tab 11 is placed on the terminal post. During the assembly of the tab 11, terminal post, and cover plate, the tab 11 abuts against the outer peripheral walls of the cover plate and the terminal post, respectively, thus restricting the movement of the tab 11 relative to the cover plate and achieving the connection between the tab 11 and the cover plate. No welding is required during the connection of the tab 11, terminal post, and cover plate, thereby avoiding insufficient current due to poor welding and effectively preventing the risk of short circuit failure caused by metal shavings entering the cell during the welding process, thus improving the production yield of the battery.

[0033] According to this utility model, the cell cover assembly 100 connects the terminal post and the cover plate through the cooperation of the first thread and the second thread 221. The electrode tab 11 is disposed between the cover plate and the terminal post, and the electrode tab 11 abuts against the outer peripheral wall of the cover plate and the outer peripheral wall of the terminal post, thereby restricting the movement of the electrode tab 11 relative to the cover plate and realizing the connection between the electrode tab 11 and the cover plate. No welding is required in the process of connecting the electrode tab 11, the terminal post and the cover plate, thereby avoiding insufficient current due to poor welding, effectively preventing the risk of short circuit failure caused by metal shavings entering the cell during the welding process, and improving the production yield of the battery.

[0034] According to some embodiments of the present invention, the pole post includes: a base plate 21 and an assembly part 22. The base plate 21 has a mating surface 24 that mates with the pole lug 11. The assembly part 22 is disposed on the mating surface 24 and protrudes from the mating surface 24. The assembly part 22 is adapted to extend into the connecting hole 101. At least a portion of the outer peripheral wall of the assembly part 22 has a second thread 221 formed on it.

[0035] In some specific embodiments, the electrode post consists of a base plate 21 and an assembly part 22. The base plate 21 has a mating surface 24 that mates with the tab 11. This surface supports the tab 11 and ensures good contact between it and the electrode post, ensuring a stable electrical connection of the tab 11 and reducing contact resistance. The mating surface 24 can be designed as a smooth surface to prevent damage to the tab 11 during installation. The assembly part 22 protrudes from the mating surface 24 of the base plate 21, forming a noticeable protrusion. This helps guide the electrode post to be correctly inserted into the connecting hole 101 and provides additional mechanical strength. The assembly part 22 is adapted to extend into the connecting hole 101 on the cover plate, ensuring that the electrode post can be correctly fixed inside the cover plate. At least a portion of the outer peripheral wall of the assembly part 22 has a second thread 221 that matches the first thread, realizing a detachable connection between the electrode post and the cover plate. This eliminates the need for welding to connect the electrode post and the cover plate, effectively preventing risks such as insufficient current due to poor welding and short circuit failure caused by welding metal shavings entering the cell, thus improving production yield.

[0036] According to some embodiments of the present invention, the cover plate includes: a cover plate body 12 and a top cover 13. The cover plate body 12 has a through hole 102 formed therethrough for at least part of the assembly part 22 to pass through. The top cover 13 is detachably connected to the assembly part 22 and has a connecting hole 101 formed thereon opposite to the through hole 102.

[0037] In some specific embodiments, the cover plate consists of a cover plate body 12 and a top cover 13. The cover plate body 12 has a through hole 102 formed to allow at least part of the assembly part 22 to pass through. The through hole 102 not only provides a channel for the assembly part 22 of the pole but also ensures that the pole can be correctly installed in place. The top cover 13 is detachably connected to the assembly part 22. This design simplifies the maintenance and repair process and allows the top cover 13 to be easily removed and reinstalled when necessary without damaging other components. The top cover 13 has a connecting hole 101 that is directly opposite to the through hole 102 on the cover plate body 12, ensuring that the pole can pass smoothly through and extend to the outside to achieve electrical connection.

[0038] According to some embodiments of the present invention, the cover plate further includes: a first insulating member 14, at least a portion of the first insulating member 14 is sleeved on at least a portion of the outer periphery of the top cover 13, and at least another portion of the first insulating member 14 is located between the top cover 13 and the cover plate body 12. The first insulating member 14 can ensure electrical isolation between the top cover 13 and the cover plate body 12, avoid any possible short circuit, and improve the stability during battery operation. The first insulating member 14 can provide additional support for the top cover 13, ensuring that it is stably fixed in the correct position, thereby improving the stability and reliability of the cell cover plate assembly 100.

[0039] In addition, the first insulating element 14 can also seal the gap between the top cover 13 and the cover plate body 12 to prevent external contaminants (such as moisture and dust) from entering the cell, further improving the safety and reliability of the battery.

[0040] According to some embodiments of the present invention, the cover plate further includes a second insulating member 15. The second insulating member 15 is disposed on the side of the cover plate body 12 away from the top cover 13 and is located between the bottom plate 21 and the cover plate body 12. The second insulating member 15 can ensure that there is no direct electrical contact between the bottom plate 21 of the electrode post and the cover plate body 12, avoid the occurrence of battery short circuit accidents, and improve the stability and reliability of battery operation. The second insulating member 15 can increase the structural strength and rigidity of the cell cover plate assembly 100. Under the condition that the cover plate assembly is subjected to external pressure or impact, it can also reduce the direct contact and friction between components and reduce the risk of mechanical damage.

[0041] In addition, a mating hole 103 is formed on the second insulating member 15, which is directly opposite to the through hole 102. The mating hole 103 is used to allow the pole post to pass through it, ensuring that the pole post can be correctly aligned with the connecting hole 101 on the top cover 13. The diameter of the mating hole 103 is slightly larger than the diameter of the through hole 102 on the cover plate body 12, which facilitates the alignment and insertion operation during the pole post assembly process, and at the same time allows for slight adjustment of the pole post's setting position.

[0042] According to some embodiments of the present invention, the second insulating member 15 has a groove portion on the side opposite to the cover plate body 12, which is suitable for receiving the bottom plate 21. At least a portion of the outer periphery of the groove portion has a protrusion portion protruding from the side wall of the groove. During the assembly of the cell cover plate assembly 100 and the cell housing, the protrusion portion abuts against the inner wall of the cell housing to limit the movement of the cell cover plate assembly 100 relative to the housing, thereby improving the stability and reliability of the connection between the cell cover plate assembly 100 and the cell housing. The tab 11 abuts against the inner wall of the groove portion and the mating surface 24 to limit the movement of the tab 11 relative to the cover plate, ensuring a good electrical connection between the tab 11 and the pole post, and preventing the tab 11 from being displaced or torn during use.

[0043] According to some embodiments of this utility model, a rounded chamfer is formed at the edge of the sidewall of the groove. When the tab 11 needs to be bent during the connection between the cover plate and the pole post, the rounded chamfer can significantly reduce the stress concentration at the contact point between the tab 11 and the sidewall of the groove, reduce the risk of the tab 11 tearing or breaking, and ensure the reliability of the electrical connection. Compared with the traditional right-angle design, the rounded chamfer design of the sidewall of the groove in this application eliminates the potential sharp edge and will not scratch the surface of the tab 11, further improving the safety of the battery.

[0044] According to some embodiments of the present invention, the cover plate assembly further includes: a sealing element 23, which is sleeved on at least a portion of the assembly portion 22. At least a portion of the sealing element 23 is received within the mating hole 103. The sealing element 23 can be constructed as a sealing ring, which can be made of insulating material to ensure that it can effectively isolate the current between the terminal and the surrounding conductive parts and prevent short circuits. The sealing ring can also be made of elastic material, such as rubber or silicone, so that the sealing ring can adapt to different tolerances during assembly and maintain a tight sealing effect during use. The sealing ring can seal the connection gap between the terminal and the cover plate, preventing external contaminants such as dust and moisture from entering the cell, thereby protecting the cell from corrosion or other damage and ensuring the safety of the battery.

[0045] The sealing ring has an assembly hole at its center that allows the terminal post to pass through, enabling the connection between the terminal post and the external circuit. The sealing ring consists of a first sealing part and a second sealing part. The outer diameter of the first sealing part is larger than the outer diameter of the second sealing part. The second sealing part is disposed on the first sealing part. The second sealing part is adapted to seal the gap between the assembly part 22 and the cover plate body 12. The first sealing part is adapted to seal the gap between the second insulating part 15 and the assembly part 22. This effectively prevents metal shavings or other foreign objects from entering the cell interior during the assembly process of the cell cover plate assembly 100, reduces the possibility of foreign objects passing through, thereby avoiding the risk of battery short circuit failure and improving the safety and reliability of the battery.

[0046] The battery according to this utility model is briefly described below.

[0047] The battery according to this utility model is provided with the cell cover plate assembly 100 as described in any of the above embodiments. Since the battery according to this utility model is provided with the cell cover plate assembly 100 as described in any of the above embodiments, the battery according to this utility model has better safety and higher reliability.

[0048] The following is a brief description of the power equipment according to this utility model.

[0049] The power device according to this utility model is equipped with a battery as described in any of the above embodiments. Since the power device according to this utility model is equipped with a battery as described in any of the above embodiments, the power device according to this application has good safety and high reliability.

[0050] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0051] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more.

[0052] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0053] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0054] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of the present invention.

[0055] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrochemical cell cover plate assembly, comprising: include: A cover plate, wherein a connecting hole (101) is provided on the cover plate, and a first thread is formed on the inner wall of the connecting hole (101); The pole is detachably connected to the cover plate, and is housed in the communicating hole (101). A second thread (221) is formed on the pole to cooperate with the first thread. A tab (11) is placed on the pole post and located between the pole post and the cover plate. The tab (11) abuts against the outer peripheral wall of the cover plate and the outer peripheral wall of the pole post to restrict the movement of the tab (11) relative to the cover plate.

2. The cell cover plate assembly of claim 1, wherein, The pole includes: The base plate (21) has a mating surface (24) that mates with the tab (11); Assembly part (22) is disposed on the mating surface (24) and protrudes from the mating surface (24). Assembly part (22) is adapted to extend into the communicating hole (101). At least a portion of the outer peripheral wall of the assembly part (22) is formed with the second thread (221).

3. The cell cover plate assembly of claim 2, wherein, The cover plate includes: The cover plate body (12) has a through hole (102) formed thereon, which is suitable for at least part of the assembly part (22) to pass through; Top cover (13), which is detachably connected to the assembly part (22), and the top cover (13) has a connecting hole (101) that is directly opposite to the through hole (102).

4. The cell cover plate assembly of claim 3, wherein, The cover plate also includes: A first insulating element (14) is provided on at least a portion of the outer periphery of the top cover (13), and at least another portion of the first insulating element (14) is located between the top cover (13) and the cover plate body (12).

5. The cell cover plate assembly of claim 3, wherein, The cover plate also includes: The second insulating element (15) is disposed on the side of the cover plate body (12) away from the top cover (13) and is located between the bottom plate (21) and the cover plate body (12).

6. The cell cover plate assembly of claim 5, wherein, The second insulating member (15) has a groove on the side opposite to the cover plate body (12) that is suitable for receiving the bottom plate (21). The electrode (11) abuts against the inner wall of the groove and the mating surface (24) to restrict the movement of the electrode (11) relative to the cover plate.

7. The cell cover plate assembly of claim 6, wherein, The edge of the sidewall of the groove is formed with a rounded chamfer.

8. The cell cover plate assembly of claim 2, wherein, Also includes: A seal (23) is fitted onto at least a portion of the assembly (22).

9. A battery characterized by Includes the cell cover assembly as described in any one of claims 1-8.

10. A power plant characterized by Includes the battery as described in claim 9.

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