Battery and cover plate assembly thereof

Abstract

The utility model relates to the technical field of new energy batteries, and discloses a battery and a cover plate assembly thereof. A through hole is formed in the bearing part, and a protruding part is further arranged on the surface of one side, in the thickness direction of the cover plate body, of the bearing part; the limiting part is connected to the edge of the mounting hole, at least one part of the limiting part is located on the side, away from the protruding part, of the body in the thickness direction of the cover plate body, and the limiting part and the bearing part are arranged at intervals; at least one part of the pole is positioned between the bearing part and the limiting part; the sealing element is arranged on the pole in a surrounding mode, at least part of the sealing element is located between the bearing part and the pole, at least part of the sealing element is located in the through hole, the sealing element abuts against the bearing part, and the projection of the sealing element on the cover plate body and the projection of the protruding part on the cover plate body at least partially coincide. The cover plate can prevent the bearing part from deforming due to the pressing force of the sealing piece, the strength of the cover plate is ensured, and the sealing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery technical field especially relates to a battery and cover plate subassembly thereof. BACKGROUND

[0002] For the cover plate of the battery, the pole is usually arranged to realize the electric connection between the outside and the battery internal electric core. The pole is arranged in the pole hole of the cover plate, and the sealing ring is arranged between the cover plate and the pole to isolate the inside and the outside of the battery. In order to ensure the sealing effect of the sealing ring, the sealing ring is abutted on the cover plate near the pole hole, which is easy to cause the deformation of the cover plate, and the sealing effect is poor. SUMMARY

[0003] The utility model discloses a battery and cover plate subassembly thereof, which can ensure the strength of the cover plate and improve the sealing effect.

[0004] In order to realize the above-mentioned purpose, the utility model provides a cover plate subassembly of battery, including:

[0005] The cover plate body has a mounting hole;

[0006] The bearing part is arranged on the edge of the mounting hole, the bearing part is formed with a through hole, and the bearing part is further provided with a protruding part on one side surface in the thickness direction of the cover plate body;

[0007] The limiting part is connected on the edge of the mounting hole, and at least a part of the limiting part is located on the side of the body away from the protruding part in the thickness direction of the cover plate body and is arranged in a spaced mode with the bearing part;

[0008] The pole is arranged at least partially between the bearing part and the limiting part;

[0009] The sealing element is arranged on the pole in a surrounding mode, at least a part of the sealing element is located between the bearing part and the pole, at least a part of the sealing element is located in the through hole, the sealing element is abutted and pressed with the bearing part, and the projection of the sealing element on the cover plate body at least partially coincides with the projection of the protruding part on the cover plate body.

[0010] The utility model further provides a battery, including:

[0011] The shell has an opening in communication with the inside of the shell;

[0012] The electric core is arranged in the inside of the shell;

[0013] The cover plate subassembly as described above covers the opening.

[0014] The utility model provides a kind of battery and its cover plate assembly, compared with prior art, its beneficial effect is in at:

[0015] The utility model discloses a cover plate assembly of battery, including cover plate body, bearing part, limiting portion, pole and sealing element, is provided on the bearing part protruding portion, the projection of sealing element on cover plate body and the projection of protruding portion on cover plate body at least partially coincides, i.e.

[0016] The utility model discloses a battery, including above-mentioned cover plate assembly, can improve the strength of bearing part of protruding portion position, further prevent bearing part from deforming due to the pressure of sealing element, ensure the strength of cover plate, improve sealing effect. DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of the cover plate assembly of the utility model embodiment.

[0018] Figure 2 It is Figure 1 the enlarged schematic view of B in.

[0019] Figure 3 It is the partial structure schematic diagram of the cover plate assembly of the utility model embodiment.

[0020] Figure 4 It is Figure 3 the enlarged schematic view of C in.

[0021] Figure 5 It is Figure 1 the section view of A-A in.

[0022] Figure 6 It is Figure 5 the enlarged schematic view of D in.

[0023] Figure 7 It is the structure schematic diagram of sealing element of the utility model embodiment.

[0024] In the figure, 1, cover plate body;2, bearing part;3, limiting portion;4, pole;5, sealing element;11, mounting hole;12, recess;21, through hole;22, protruding portion;31, connecting portion;32, flanging portion. DETAILED DESCRIPTION

[0025] The specific implementation of the utility model is described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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. They do not 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. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Please refer to Figures 1-2 As shown, a battery cover assembly according to an embodiment of the present invention includes: a cover body 1, a support part 2, a limiting part 3, an electrode post 4, and a sealing member 5.

[0031] The cover plate body 1 has mounting holes 11.

[0032] The cover is a component used to seal the opening of the battery casing. The cover and the battery casing together form the space where the battery core is placed.

[0033] Mounting hole 11 is used to provide mounting space for pole post 4.

[0034] Please refer to Figure 3 and Figure 4 The support portion 2 is arranged around the edge of the mounting hole 11. The support portion 2 has a through hole 21. The support portion 2 also has a protrusion 22 on one side surface of the cover plate body 1 in the thickness direction.

[0035] The bearing part 2 can bear the pole 4, and the through hole 21 formed by the bearing part 2 can connect the pole 4 with the battery cell inside the battery shell. The setting of the protruding part 22 can improve the strength of the bearing part 2, that is, the strength near the mounting hole 11 is enhanced.

[0036] In the embodiment, the thickness direction of the cover plate body 1 is the height direction of the battery.

[0037] The limiting part 3 is connected to the edge of the mounting hole 11, and at least a part of the limiting part 3 is located on the side of the body away from the protruding part 22 in the thickness direction of the cover plate body 1 and is arranged in a spaced manner with the bearing part 2.

[0038] The limiting part 3 limits the pole 4.

[0039] At least a part of the pole 4 is located between the bearing part 2 and the limiting part 3.

[0040] The pole 4 is used to electrically connect the battery with external devices, and the pole 4 is divided into positive poles 4 and negative poles 4 with different polarities. The positive pole 4 or the negative pole 4 of each battery can be provided in multiple. In the embodiment, one positive pole 4 and one negative pole 4 are provided. In the specific production implementation, the number and position of the pole 4 can be set as needed.

[0041] The limiting part 3 and the bearing part 2 jointly clamp and fix the pole 4.

[0042] Please refer to Figures 5-7 The sealing member 5 is arranged around the pole 4, at least a part of the sealing member 5 is located between the bearing part 2 and the pole 4, at least a part of the sealing member 5 is located in the through hole 21, the sealing member 5 is pressed against the bearing part 2, and the projection of the sealing member 5 on the cover plate body 1 at least partially overlaps the projection of the protruding part 22 on the cover plate body 1.

[0043] The setting of the sealing member 5 can seal the pole 4, so that the gap between the inside of the battery and the outside of the battery is closed by the sealing member 5.

[0044] In order to ensure the sealing effect, the pole 4 and the bearing part 2 will jointly extrude the sealing member 5, and at the same time, the sealing member 5 will also press the pole 4 and the bearing part 2.

[0045] The projection of the sealing member 5 on the cover plate body 1 at least partially overlaps the projection of the protruding part 22 on the cover plate body 1, that is, the protruding part 22 is arranged at the position corresponding to the sealing member 5 of the bearing part 2, so as to improve the strength of the bearing part 2 at the position of the protruding part 22, thereby preventing the bearing part 2 from being deformed due to the pressing force of the sealing member 5, ensuring the strength of the cover plate, and improving the sealing effect.

[0046] In some embodiments, the limiting portion 3 comprises a connecting portion 31 and a flange portion 32, the flange portion 32 is connected to the edge of the mounting hole 11 through the connecting portion 31, and the flange portion 32 extends towards the pole 4 in the direction parallel to the surface of the cover plate body 1.

[0047] The size of the protruding portion 22 in the thickness direction of the cover plate body 1 is c mm, the size of the flange portion 32 in the thickness direction of the cover plate body 1 is b mm, and 0.2≤c / b≤0.7 is satisfied. Preferably, c / b can take values such as 0.3, 0.45, 0.57, 0.62, etc.

[0048] When the above range is satisfied, the strength of the bearing portion 2 can be ensured, deformation due to the pressing of the sealing member 5 can be prevented, the sealing performance is improved, and at the same time, the overall weight of the cover plate assembly and the space occupied by the protruding portion 22 are not excessively increased, and the energy density of the battery is ensured. If the ratio is too small, the strength enhancement effect of the protruding portion 22 on the bearing portion 2 is small, and the bearing portion 2 is still prone to deformation, resulting in sealing failure; if the ratio is too large, the overall weight of the cover plate assembly and the proportion of the space occupied by the protruding portion 22 in the internal space of the shell after installation will increase, and the insufficient energy density of the battery caused by the excessive space occupied by the protruding portion 22.

[0049] In measuring the sizes c and b, common length measuring tools such as ruler and tape measure can be used.

[0050] In measuring c, one end face of the protruding portion 22 in the thickness direction of the cover plate body 1 is taken as a reference surface, the distance between the surface of the bearing portion 2 and the reference surface is measured along the thickness direction of the cover plate body 1 by a length measuring tool, and the average value of five measurements is taken to obtain the size c mm of the protruding portion 22 in the thickness direction of the cover plate body 1.

[0051] In measuring b, one end face of the flange portion 32 in the thickness direction of the cover plate body 1 is taken as a reference surface, the distance between the other end face of the flange portion 32 and the reference surface is measured along the thickness direction of the cover plate body 1 by a length measuring tool, and the average value of five measurements is taken to obtain the size b mm of the flange portion 32 in the thickness direction of the cover plate body 1.

[0052] In this embodiment, 0.2≤c≤1 and 0.5≤b≤1.2 are also satisfied to adapt to various specifications of batteries. Preferably, c can also take values such as 0.3, 0.42, 0.52, 0.68, 0.74, 0.9, etc., and b can also take values such as 0.58, 0.67, 0.72, 0.94, 1.05, 1.16, etc.

[0053] The size of the flange part 32 in the direction parallel to the surface of the cover plate body 1 is a mm, and satisfies 0.5≤a≤3 and 0.2≤c / b≤0.5. Preferably, a can take values of 0.7, 1, 1.2, 1.5, 1.9, 2.2, 2.6, 2.8, etc., and c / b can take values of 0.25, 0.3, 0.35, 0.4, 0.45, etc.

[0054] When the above ranges are satisfied, the balanced limiting effect of the bearing part 2 and the limiting part 3 on the pole 4 can be ensured. This is because the longer the length of the flange part 32, that is, the larger a is, the better the limiting effect on the pole 4 will be, and the greater the pressure of the flange part 32 on the bearing part 2 through the sealing member 5 during molding and use, so when a is larger, the thickness b also needs to be thicker to play a better reinforcing role.

[0055] When measuring the size a, a general length measuring tool can be used, such as a ruler or a tape measure.

[0056] When measuring a, the distance between the outer contour and the inner contour of the flange part 32 in the direction parallel to the surface of the cover plate body 1 is measured by a length measuring tool, and the size a mm of the flange part 32 in the direction parallel to the surface of the cover plate body 1 is obtained by measuring multiple times and taking the average.

[0057] When the pole 4 passes through the through hole 21, the size c mm of the protruding part 22 in the thickness direction of the cover plate body 1 and the size b mm of the flange part 32 in the thickness direction of the cover plate body 1 also satisfy 0.2≤c / b≤0.55. Preferably, c / b can take values of 0.28, 0.35, 0.46, 0.51, etc.

[0058] When the pole 4 passes through the through hole 21, the pressure of the pole 4 on the bearing part 2 will be smaller than when it does not pass through the through hole 21, so the thickness of the protruding part 22 can be appropriately reduced to reduce costs and the occupation of the internal space of the battery.

[0059] In the thickness direction of the cover plate body 1, the distance between the end of the pole 4 close to the bearing part 2 and the surface of the bearing part 2 is d mm, and satisfies c

[0060] The size c mm of the protruding part 22 in the thickness direction of the cover plate body 1 and the size b mm of the flange part 32 in the thickness direction of the cover plate body 1 also satisfy 0.2≤c / b≤0.5. Preferably, c / b can take values of 0.21, 0.29, 0.34, 0.37, 0.41, 0.47, etc.

[0061] Since the pole column 4 protrudes from the surface of the bearing portion 2 and the surface of the protruding portion on the bearing portion 2 in the thickness direction of the cover plate body 1, the above-mentioned orientation is met, which facilitates the subsequent installation of the insulation member, prevents the pole column 4 from being overlapped with the cover plate body 1, and thus prevents the risk of short circuit or corrosion.

[0062] When the pole column 4 does not pass through the through hole 21, the end of the pole column 4 close to the bearing portion 2 is located on the side of the bearing portion 2 facing the limiting portion 3 in the thickness direction of the cover plate body 1. The size c mm of the protruding portion 22 in the thickness direction of the cover plate body 1 and the size b mm of the flange portion 32 in the thickness direction of the cover plate body 1 also satisfy 0.3≤c / b≤0.7. Preferably, c / b can take values of 0.32, 0.43, 0.5, 0.57, 0.63, etc.

[0063] In this case, the pressure of the pole column 4 on the bearing portion 2 is relatively large, and thus it is necessary to ensure the strength enhancement effect of the protruding portion 22 on the bearing portion 2 to prevent the deformation of the bearing portion 2 and thus the failure of the seal.

[0064] In some embodiments, the limiting portion 3 and the cover plate body 1 are in a split structure, and the limiting portion 3 is welded to the cover plate body 1.

[0065] The size c mm of the protruding portion 22 in the thickness direction of the cover plate body 1 and the size b mm of the flange portion 32 in the thickness direction of the cover plate body 1 also satisfy 0.25≤c / b≤0.7. Preferably, c / b can take values of 0.28, 0.35, 0.4, 0.48, 0.52, 0.63, etc.

[0066] For the case of the split structure, the thickness of the protruding portion 22 is set to be relatively large, which can increase the heat dissipation capacity of the welding position between the limiting portion 3 and the cover plate body 1 and reduce the influence of welding heat on the seal 5.

[0067] In some embodiments, the limiting portion 3 includes the connecting portion 31 and the flange portion 32, and the flange portion 32 is connected to the edge of the mounting hole 11 through the connecting portion 31, and the flange portion 32 extends toward the pole column 4 in a direction parallel to the surface of the cover plate body 1.

[0068] In some embodiments, the limiting portion 3, the bearing portion 2, and the cover plate body 1 are integrally formed, and the surface of the cover plate body 1 or the bearing portion 2 away from the limiting portion 3 is provided with a groove 12.

[0069] In the case of integral forming, the limiting portion 3 and the bearing portion 2 are originally extruded from the material of the cover plate body 1. Since the material is limited, part of the material will be left out on the cover plate body 1. For the case of extruding the bearing portion 2 first and then extruding the limiting portion 3, part of the material may also be left out from the bearing portion 2, or part of the material may be left out from both the bearing portion 2 and the cover plate body 1.

[0070] In other words, the recess 12 is located on the cover plate body 1, and the recess 12 is spaced apart from the protruding portion 22. In this way, the spacing between the recess 12 and the protruding portion 22 can reduce the influence on the strength of the bearing portion 2 near the sealing member 5. Alternatively, the recess 12 is provided on the protruding portion, or the bearing portion 2 is provided at a position other than the protruding portion.

[0071] The embodiment also provides a battery, comprising a shell, a battery cell, and the cover plate assembly. The shell has an opening in communication with the inside of the shell, the battery cell is arranged in the inside of the shell, and the cover plate assembly covers the opening. Through such a structure, the strength of the bearing portion 2 at the position of the protruding portion 22 can be improved, thereby preventing the bearing portion 2 from being deformed due to the pressing force of the sealing member 5, ensuring the strength of the cover plate, and improving the sealing effect.

[0072] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A cover plate assembly for a battery, characterized by The battery cover plate assembly comprises: a cover plate body having a mounting hole; a bearing part arranged around the edge of the mounting hole, the bearing part being formed with a through hole, and one side surface of the bearing part in the thickness direction of the cover plate body being further provided with a protruding part; a limiting part connected to the edge of the mounting hole, at least a part of the limiting part being located on the side of the body away from the protruding part in the thickness direction of the cover plate body and being arranged in a spaced manner with the bearing part; a pole arranged around the edge of the mounting hole, at least a part of the pole being located between the bearing part and the limiting part; a sealing part arranged around the pole, at least a part of the sealing part being located between the bearing part and the pole, at least a part of the sealing part being located in the through hole, the sealing part being in abutment with the bearing part, and the projection of the sealing part on the cover plate body at least partially overlapping the projection of the protruding part on the cover plate body.

2. The battery cover plate assembly according to claim 1, wherein: the limiting part comprises a connecting part and a flange part, the flange part being connected to the edge of the mounting hole through the connecting part, and the flange part extending towards the pole in a direction parallel to the surface of the cover plate body; the protruding part has a size c mm in the thickness direction of the cover plate body, and the flange part has a size b mm in the thickness direction of the cover plate body, and the following condition is satisfied: 0.2≤c / b≤0.

7.

3. The battery cover plate assembly according to claim 2, wherein: the flange part has a size a mm in the direction parallel to the surface of the cover plate body, and the following conditions are satisfied: 0.5≤a≤3, and 0.2≤c / b≤0.

5.

4. The battery cover plate assembly according to claim 2, wherein: the pole passes through the through hole; the protruding part has a size c mm in the thickness direction of the cover plate body, and the flange part has a size b mm in the thickness direction of the cover plate body, and the following condition is satisfied: 0.2≤c / b≤0.

55.

5. The battery cover plate assembly according to claim 2, wherein: in the thickness direction of the cover plate body, one end of the pole close to the bearing part is located on the side of the bearing part facing the limiting part; the protruding part has a size c mm in the thickness direction of the cover plate body, and the flange part has a size b mm in the thickness direction of the cover plate body, and the following condition is satisfied: 0.3≤c / b≤0.

7.

6. The battery cover plate assembly according to claim 2, wherein: the limiting part and the cover plate body are in a split structure, and the limiting part is welded to the cover plate body; the protruding part has a size c mm in the thickness direction of the cover plate body, and the flange part has a size b mm in the thickness direction of the cover plate body, and the following condition is satisfied: 0.25≤c / b≤0.

7.

7. The battery cover plate assembly according to claim 2, wherein: the limiting part, the bearing part and the cover plate body are integrally formed, and one side surface of the cover plate body or the bearing part away from the limiting part is provided with a groove.

8. The battery cover plate assembly according to claim 4, wherein: the distance from the end of the post near the carrier to the surface of the carrier is d mm, and c < d. The size of the protrusion in the thickness direction of the cover plate body is c mm, and the size of the flange in the thickness direction of the cover plate body is b mm, and 0.2 ≤ c / b ≤ 0.

5.

9. The battery cover plate assembly according to claim 7, wherein: the protrusion is spaced apart from the groove.

10. The battery cover plate assembly according to claim 2, wherein: the size of the protrusion in the thickness direction of the cover plate body is c mm, and 0.2 ≤ c ≤ 1.

11. The battery cover plate assembly according to claim 2, wherein: the size of the flange in the thickness direction of the cover plate body is b mm, and 0.5 ≤ b ≤ 1.

2. including: a housing having an opening in communication with the interior of the housing; an electric core disposed in the interior of the housing; the cover plate assembly according to any one of claims 1-11, covering the opening.

12. A battery, characterized by ​ ​ ​ ​

Images