Battery cover plate and battery with same

Abstract

The utility model discloses a battery cover plate and a battery with the same. The battery cover plate comprises a cover plate body, and a pole, an anti-explosion valve, an insulating plate and an insert which are arranged on the cover plate body, the insulating plate is arranged on one side, facing the battery cell, of the cover plate; the insert is detachably mounted on one side, facing the battery cell, of the insulating plate, and the elastic coefficient of the insert is greater than that of the insulating plate. By arranging the insert, the thickness size of the battery cover plate can be adjusted, so that the battery cover plate can adapt to mounting spaces with different height sizes, and the situation that the battery cover plate extrudes a battery cell or the battery cover plate cannot be assembled is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover and a battery having the same. Background Art

[0002] In the prior art, the lithium battery end plate is the core component of the assembly, and its structural design is crucial to the safety of the battery cell. Most of the existing end plates are one-piece injection molded parts, which have problems such as the inability to adjust the size, resulting in assembly difficulties. At the same time, the mold size adjustment cycle of the one-piece injection molded parts is long and the cost is high. In addition, the one-piece injection molded parts are made of the same material as a whole, and cannot be adjusted for local materials, so the hardness and strength of the local materials cannot be optimized. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery cover whose size is adjustable and whose partial material can be replaced.

[0004] According to the embodiment of the utility model, the battery cover comprises: a cover body and a pole, an explosion-proof valve, an insulating plate and an insert arranged on the cover body; the insulating plate is arranged on the side of the cover facing the battery cell; the insert is detachably installed on the side of the insulating plate facing the battery cell, wherein the elastic coefficient of the insert is greater than the elastic coefficient of the insulating plate.

[0005] According to the battery cover plate of the embodiment of the utility model, the thickness of the battery cover plate can be adjusted by setting an insert, so that the battery cover plate can adapt to installation spaces of different heights, thereby avoiding the situation where the battery cover plate squeezes the battery cell or the battery cover plate cannot be assembled.

[0006] In addition, the battery cover according to the utility model may also have the following additional technical features:

[0007] In some embodiments, a latching protrusion is provided on the insert, and a latching hole cooperating with the latching protrusion is provided on the insulating plate.

[0008] In some embodiments, the latch protrusion and the latch hole are interference fit.

[0009] In some embodiments, the insulating plate includes a first plate, a second plate and a connecting plate connected between the first plate and the second plate, the first plate has a first groove opening toward the cover plate body, the second plate has a second groove opening toward the cover plate body, and the connecting plate has a hollow area that penetrates the connecting plate along the thickness direction of the connecting plate.

[0010] In some embodiments, the insert includes a first insert and a second insert, the first insert is installed at the first panel, and the second insert is installed at the second panel.

[0011] In some embodiments, the explosion-proof valve is arranged opposite to the first plate, a plurality of first air holes are arranged on the first plate, and a plurality of second air holes corresponding to the plurality of first air holes are arranged on the first insert.

[0012] In some embodiments, in a projection plane parallel to the insulating plate, a projection area S1 of the first insert is greater than a projection area S2 of the second insert; a projection area S3 of the first plate is greater than a projection area S4 of the second plate; and the following conditions are satisfied: 0.9≤S1 / S3≤1; 0.9≤S2 / S4≤1.

[0013] In some embodiments, in the thickness direction of the insulating plate, the thickness of the insulating plate is T, and the sum of the thickness of the insulating plate and the insert is H, satisfying: 0.5≤T / H≤0.8.

[0014] In some embodiments, the insulating plate is an integrally-injected molded part.

[0015] The utility model also provides a battery having the above embodiment.

[0016] The battery according to the embodiment of the utility model comprises: a housing, a battery cell and a battery cover of the above embodiment; the housing has an opening; the battery cell is installed in the housing; and the battery cover is installed at the opening to open or close the opening. By providing the battery cover of the above embodiment, the overall quality and safety performance of the battery can be effectively improved, and the assembly efficiency of the battery can be improved.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded view of a battery cover according to an embodiment of the utility model;

[0019] Figure 2 is an assembly diagram of a battery cover (first viewing angle) according to an embodiment of the utility model;

[0020] Figure 3 is an assembly diagram of a battery cover plate (second viewing angle) according to an embodiment of the utility model;

[0021] Figure 4 is an assembly diagram of a battery cover plate (third viewing angle) according to an embodiment of the utility model;

[0022] Figure 5 is an assembly diagram of a battery cover plate (fourth viewing angle) according to an embodiment of the utility model;

[0023] Figure 6 is based on Figure 5 Sectional view along line AA;

[0024] Figure 7 is an assembly diagram of a battery cover plate (fifth viewing angle) according to an embodiment of the utility model;

[0025] Figure 8 is based on Figure 7 Sectional view along the midline BB;

[0026] Fig. 9 is based on Figure 7 Sectional view of the mid-CC line;

[0027] Fig.10 is a schematic structural diagram of a battery (first viewing angle) according to an embodiment of the utility model;

[0028] Fig.11 is based on Fig.10 Enlarged view of area D in the middle;

[0029] Fig.12 is a schematic structural diagram of a battery (second viewing angle) according to an embodiment of the utility model;

[0030] Fig.13 is based on Fig.12 Magnified view of area E in the middle.

[0031] Reference numerals:

[0032] 100. battery cover; 200. battery;

[0033] 1. Cover plate body; 11. Pole; 12. Explosion-proof valve;

[0034] 2. Insulating plate; 21. First plate; 22. Second plate; 23. Connecting plate; 24. Clamping hole; 211. First groove; 212. First vent hole; 221. Second groove; 231. Hollow area;

[0035] 3. Insert; 31. First insert; 32. Second insert; 33. Boss; 311. Second vent hole;

[0036] 4. Shell; 5. Battery cell. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Reference below Figure 1-Figure 13 A battery cover 100 according to an embodiment of the present invention is described.

[0042] like Figures 1 to 13 As shown, the battery cover 100 according to the embodiment of the utility model includes: a cover body 1 and a pole 11, an explosion-proof valve 12, an insulating plate 2 and an insert 3 arranged on the cover body 1; the insulating plate 2 is arranged on the side of the cover facing the battery cell 5; the insert 3 is detachably installed on the side of the insulating plate 2 facing the battery cell 5, wherein the elastic coefficient of the insert 3 is greater than the elastic coefficient of the insulating plate 2.

[0043] In this embodiment, the battery cover 100 adopts a split design, which is divided into three parts: a cover body 1, an insulating plate 2 and an insert 3. Compared with the one-piece design of the battery cover 100 in the prior art, the split design of the battery cover 100 can more conveniently adjust the assembly size, local material and local structure, and the adjustment cost is lower and the adjustment time is shorter.

[0044] In the actual assembly process, the battery cover 100 and the battery 200 shell 4 together construct an installation space, and the battery cell 5 is installed in the installation space. However, during assembly, the height of the preset installation space often does not match the height of the battery cell 5, resulting in the battery cover 100 squeezing the battery cell 5, or the battery cover 100 cannot be assembled. In this embodiment, the insert 3 is provided to adjust the thickness of the battery cover 100, so that the battery cover 100 can be normally assembled with the battery cell 5. For example, when the battery cell 5 is assembled, if the height of the remaining installation space for the battery cover 100 is small, the insert 3 with a smaller thickness is replaced to reduce the overall thickness of the battery cover 100, so that the thickness of the battery cover 100 can match the height of the remaining installation space, thereby completing the assembly of the battery 200.

[0045] Furthermore, in order to ensure that the insert 3 with reduced thickness can ensure sufficient structural strength, the material used to make the insert 3 can be replaced, and a material with higher structural strength can be used to make the insert 3 to ensure that the insert 3 has sufficient structural strength. At the same time, when the thickness remains unchanged, the structural strength of the insert 3 can be improved by using a material with higher structural strength to make the insert 3, thereby achieving the purpose of improving the local structural strength of the battery cover 100.

[0046] In addition, since the elastic coefficient of the insert 3 is greater than the elastic coefficient of the insulating plate 2 , when the insert 3 is squeezed, it can have a larger deformation amount, thereby avoiding squeezing the battery cell 5 and protecting the safety of the battery cell 5 .

[0047] According to the battery cover 100 of the embodiment of the utility model, by setting the insert 3, the thickness of the battery cover 100 can be adjusted so that the battery cover 100 can adapt to installation spaces of different heights, thereby avoiding the situation where the battery cover 100 squeezes the battery cell 5 or the battery cover 100 cannot be assembled.

[0048] In one embodiment of the present invention, Figures 1 to 13 As shown, the insert 3 is provided with a locking protrusion 33, and the insulating plate 2 is provided with a locking hole 24 that matches the locking protrusion 33. Figure 3 , Figure 6 and Figure 7As described, a plurality of latching protrusions 33 are spaced apart on one side of the insert 3 facing the insulating plate 2, and a plurality of latching holes 24 are spaced apart on one side of the insulating plate 2 facing the insert 3. The plurality of latching protrusions 33 correspond to the plurality of latching holes 24 one by one, and the insert 3 is installed on the insulating plate 2 through the corresponding cooperation between the plurality of latching protrusions 33 and the plurality of latching holes 24. Such a design can facilitate the replacement of the insert 3 and improve the assembly efficiency.

[0049] In some embodiments, the locking protrusion 33 and the locking hole 24 are interference fit to ensure the connection strength between the insert 3 and the insulating plate 2 and prevent the insert 3 from being separated from the insulating plate 2.

[0050] In one embodiment of the present invention, Figures 1 to 13 As shown, the insulating plate 2 includes a first plate 21, a second plate 22 and a connecting plate 23 connected between the first plate 21 and the second plate 22, the first plate 21 has a first groove 211 opening toward the cover plate body 1, the second plate 22 has a second groove 221 opening toward the cover plate body 1, and the connecting plate 23 has a hollow area 231 that penetrates the connecting plate 23 along the thickness direction of the connecting plate 23.

[0051] In this embodiment, the arrangement of the first groove 211, the second groove 221 and the hollow area 231 can reduce the weight of the insulating plate 2 while ensuring the structural strength of the insulating plate 2 remains unchanged, so that the battery cover 100 as a whole meets the requirements of lightweight design.

[0052] In a specific embodiment of the present invention, Figures 1 to 13 As shown, the insert 3 includes a first insert 31 and a second insert 32. The first insert 31 is installed at the first plate 21, and the second insert 32 is installed at the second plate 22. Figure 1 and Figure 4 As shown, a first boss is provided on the side of the first plate 21 facing the insert 3, a second boss is provided on the side of the second plate 22 facing the insert 3, the first insert 31 is installed on the table top of the first boss, and the second insert 32 is installed on the table top of the second boss. The setting of the first boss and the second boss can not only facilitate the rapid assembly of the first insert 31 and the second insert 32, but also enhance the structural strength of the first plate 21 and the second plate 22; by setting the first insert 31 and the second insert 32, the thickness of the battery cover 100 can be adjusted more evenly, and the local uneven thickness can be reduced.

[0053] In a specific embodiment of the present invention, Figures 1 to 13As shown, the explosion-proof valve 12 is arranged opposite to the first plate 21, a plurality of first air holes 212 are arranged on the first plate 21, and a plurality of second air holes 311 opposite to the plurality of first air holes 212 are arranged on the first insert 31. In this specific embodiment, when the battery cell 5 has thermal runaway, the high-pressure gas and high-pressure liquid ejected from the battery cell 5 can reach the explosion-proof valve 12 through the first air holes 212 and the second air holes 311 opposite to each other, and be discharged from the explosion-proof valve 12 to the outside of the battery 200, thereby reducing the damage of the high-pressure gas and high-pressure liquid to the battery cell 5.

[0054] In a specific embodiment of the present invention, in the projection plane parallel to the insulating plate 2, the projection area S1 of the first insert 31 is greater than the projection area S2 of the second insert 32; the projection area S3 of the first plate 21 is greater than the projection area S4 of the second plate 22; and the following conditions are satisfied: 0.9≤S1 / S3≤1; 0.9≤S2 / S4≤1. In this specific embodiment, when the ratio of the projection area S1 of the first insert 31 to the projection area S3 of the first plate 21, and the ratio of the projection area S2 of the second insert 32 to the projection area S4 of the second plate 22 are both less than 0.9, the overall volume of the first insert 31 and the second insert 32 is too small to effectively support the first plate body and the second plate body, thereby causing local shaking, which is not conducive to the installation stability of the battery cover 100; ... When the ratio of the projection area S4 is greater than 1, the overall volume of the first insert 31 and the second insert 32 is too large and will exceed the area of ​​the first plate body and the second plate body respectively, thereby interfering with the surrounding components and causing assembly difficulties; when the ratio of the projection area S1 of the first insert 31 to the projection area S3 of the first plate body 21, and the ratio of the projection area S2 of the second insert 32 to the projection area S4 of the second plate body 22 are both greater than or equal to 0.9 and less than or equal to 1, the first insert 31 and the second insert 32 can not only effectively support the insulating plate 2 as a whole, but also will not interfere with the surrounding components.

[0055] In one embodiment of the present invention, in the thickness direction of the insulating plate 2 , the thickness of the insulating plate 2 is T, and the sum of the thicknesses of the insulating plate 2 and the insert 3 is H, satisfying: 0.5≤T / H≤0.8. In this embodiment, when the ratio between the thickness T of the insulating plate 2 and the thickness and H of the insulating plate 2 and the insert 3 is less than 0.5, the thickness of the insulating plate 2 is too small, which reduces the overall structural strength and rigidity of the battery cover 100, making the battery cover 100 unable to effectively protect the battery cell 5; when the ratio between the thickness T of the insulating plate 2 and the thickness and H of the insulating plate 2 and the insert 3 is greater than 0.8, the thickness of the insulating plate 2 is too large, and the proportion of the overall thickness of the battery 200 cover is too high, so that the adjustable thickness range of the insert 3 is too small, thereby significantly reducing the scope of application of the battery cover 100; when the ratio between the thickness T of the insulating plate 2 and the thickness and H of the insulating plate 2 and the insert 3 is greater than or equal to 0.5 and less than or equal to 0.8, the thickness of the insulating plate 2 is just right, which can not only ensure that the battery cover 100 has sufficient structural strength and rigidity, but also can effectively expand the scope of application of the battery cover 100.

[0056] In one embodiment of the present invention, the insulating plate 2 is an integrally-injected molded part, which not only can process the complex structure required by the battery cell 5 but also can effectively reduce the production cost and improve the production efficiency.

[0057] The present invention also provides a battery 200 having the above embodiment.

[0058] The battery 200 according to the embodiment of the utility model comprises: a housing 4, a battery cell 5 and a battery cover 100 of the above embodiment; the housing 4 has an opening; the battery cell 5 is installed in the housing 4; and the battery cover 100 is installed at the opening to open or close the opening. By providing the battery cover 100 of the above embodiment, the overall quality and safety performance of the battery 200 can be effectively improved, and the assembly efficiency of the battery 200 can be improved.

[0059] Other structures and operations of the battery cover 100 and the battery 200 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cover, characterized in that: include: A cover plate body and a pole and an explosion-proof valve arranged on the cover plate body; An insulating plate, the insulating plate being arranged on a side of the cover plate facing the battery cell; An insert is detachably mounted on a side of the insulating plate facing the battery core, wherein the elastic coefficient of the insert is greater than the elastic coefficient of the insulating plate.

2. The battery cover according to claim 1, characterized in that: The insert is provided with a locking protrusion, and the insulating plate is provided with a locking hole matched with the locking protrusion.

3. The battery cover according to claim 2, characterized in that: The clamping protrusion is interference fit with the clamping hole.

4. The battery cover according to claim 1, characterized in that: The insulating plate includes a first plate, a second plate and a connecting plate connected between the first plate and the second plate, the first plate has a first groove opening toward the cover plate body, the second plate has a second groove opening toward the cover plate body, and the connecting plate has a hollow area penetrating the connecting plate along the thickness direction of the connecting plate.

5. The battery cover according to claim 4, characterized in that: The insert includes a first insert and a second insert, wherein the first insert is installed at the first plate, and the second insert is installed at the second plate.

6. The battery cover according to claim 5, characterized in that: The explosion-proof valve is arranged opposite to the first plate, a plurality of first air holes are arranged on the first plate, and a plurality of second air holes corresponding to the plurality of first air holes are arranged on the first insert.

7. The battery cover according to claim 5, characterized in that: In a projection plane parallel to the insulating plate, The projection area S1 of the first insert is larger than the projection area S2 of the first insert; The projection area S3 of the first plate is greater than the projection area S4 of the second plate; and the following conditions are satisfied: 0.8≤S1 / S3≤1; 0.8≤S2 / S4≤1.

8. The battery cover according to claim 1, characterized in that: In the thickness direction of the insulating plate, the thickness of the insulating plate is T, and the sum of the thickness of the insulating plate and the insert is H, satisfying: 0.5≤T / H≤0.

9.

9. The battery cover according to claim 1, characterized in that: The insulating plate is an integrally-injected molded part.

10. A battery, characterized in that: include: a housing having an opening; A battery cell, wherein the battery cell is installed in the housing; The battery cover plate according to any one of claims 1 to 9, wherein the battery cover plate is installed at the opening to open or close the opening.

Images