Battery and battery device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery and a battery device, the battery comprises a shell and a battery cell, and the shell is provided with an accommodating space for accommodating the battery cell; any accidental surface of the shell is coated with an insulating coating, and the thickness of the edge area of the insulating coating is smaller than that of other areas of the insulating coating. Through the structural design, the marginal area with smaller thickness of the insulating coating is generated at the end of a coating process, so that the insulating coating cannot flow to other wall surfaces of the shell, the insulating property of the battery is improved by utilizing the insulating coating, the size specification of the battery is ensured, and the service life of the battery is prolonged. And the influence on the grouping effect of the batteries is avoided.

Description

Technical Field

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

[0002] In the design scheme of existing batteries, the insulation of the battery case is realized by pasting an insulating film (i.e., a blue film) on the surface of the battery case. However, the pasting efficiency of the blue film is low, and the pasting process will cause the generation of a closing position. The closing position usually adopts repeated pasting, so that the thickness of the insulating film at the closing position is inconsistent with that at other positions. In addition, the insulating film has problems such as being thin and easy to damage, and being difficult to repair after damage. To solve the above problems, some batteries adopt the method of coating an insulating coating on the surface of the battery case to realize the insulation of the case. However, since the insulating coating is a material with fluidity, when the insulating coating is applied on the cover plate at the top of the battery case, the insulating coating easily flows to the side wall of the battery case, and the coating structure formed after the curing of this part of the insulating coating will increase the size of the battery and affect the battery grouping effect. Summary of the Utility Model

[0003] A main object of the present utility model is to overcome at least one defect of the above-mentioned prior art, and to provide a battery that ensures the insulation effect and does not affect the size specification.

[0004] To achieve the above object, the present utility model adopts the following technical solutions:

[0005] According to one aspect of the present utility model, there is provided a battery, including: a case and an electric core, the case includes a body and a cover plate, the body has a cavity and is open at one side, the cover plate closes the opening of the body and together with the body forms a receiving space for receiving the electric core; the outer surface of the cover plate has a first area and a second area, the first area is an annular area on the outer surface of the cover plate adjacent to the edge of the cover plate, and the second area is an area on the outer surface of the cover plate enclosed by the first area inside; an insulating coating is applied to the second area, the insulating coating has a main part and a thinning part, the thinning part is located at the edge of the main part and is arranged along the edge of the second area, and the thickness of the end of the thinning part far from the main part is less than the thickness of the other end of the thinning part.

[0006] It can be seen from the above technical solutions that the advantages and positive effects of the battery proposed by the present utility model are as follows:

[0007] The battery proposed by the present utility model has an insulating coating applied to any outer surface of the housing, and the thickness of the edge region of the insulating coating is less than the thickness of other regions of the insulating coating. Through the above structural design, the edge region with a smaller thickness of the insulating coating of the present utility model is generated during the finishing of the coating process. Accordingly, it can be ensured that the insulating coating does not flow to other walls of the housing, while improving the insulating performance of the battery by using the insulating coating, the dimensional specifications of the battery are guaranteed, and the impact on the battery grouping effect is avoided.

[0008] Another main object of the present utility model is to overcome at least one defect of the above-mentioned prior art, and to provide a battery device using the above battery.

[0009] To achieve the above object, the present utility model adopts the following technical solutions:

[0010] According to another aspect of the present utility model, there is provided a battery device, which includes the battery proposed by the present utility model.

[0011] It can be seen from the above technical solutions that the advantages and positive effects of the battery device proposed by the present utility model are as follows:

[0012] The battery device proposed by the present utility model, by adopting the battery proposed by the present utility model, can improve the insulating performance of the battery by using the insulating coating, while guaranteeing the dimensional specifications of the battery and avoiding the impact on the battery grouping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By considering the following detailed description of the preferred embodiments of the present utility model in conjunction with the accompanying drawings, various objects, features and advantages of the present utility model will become more apparent. The drawings are only illustrative diagrams of the present utility model and are not necessarily drawn to scale. In the drawings, the same reference numerals always represent the same or similar components. Among them:

[0014] Figure 1 is a schematic perspective view of a battery shown according to an exemplary embodiment;

[0015] Figure 2 is Figure 1 a top view of the battery shown;

[0016] Figure 3 is a cross-sectional view taken along the line A-A in Figure 2 ;

[0017] Figure 4 is Figure 3 an enlarged schematic view of part B in

[0018] Figure 5 and Figure 6They are respectively partial enlarged cross-sectional views of the battery shown according to two other exemplary embodiments.

[0019] The description of the reference numerals is as follows:

[0020] 100. Body;

[0021] 110. Bottom wall;

[0022] 120. Side wall;

[0023] 200. Cover plate;

[0024] 201. First region;

[0025] 202. Second region;

[0026] 300. Insulating coating;

[0027] 310. Main body part;

[0028] 320. Thinning part;

[0029] 400. Insulating layer;

[0030] H1. Thickness;

[0031] H2. Thickness;

[0032] W. Width. Detailed implementation manners

[0033] Typical embodiments embodying the features and advantages of the present utility model will be described in detail in the following description. It should be understood that the present utility model can have various changes in different embodiments, all of which do not depart from the scope of the present utility model, and the descriptions and drawings therein are for illustrative purposes in essence and are not used to limit the present utility model.

[0034] In the following description of different exemplary embodiments of the present utility model, reference is made to the accompanying drawings, which form a part of the present utility model, and in which different exemplary structures, systems and steps that can implement various aspects of the present utility model are shown by way of example. It should be understood that other specific solutions of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present utility model. Moreover, although terms such as "above", "between", "inside" etc. may be used in this specification to describe different exemplary features and elements of the present utility model, these terms are used herein only for convenience, for example, according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the present utility model.

[0035] Refer to Figure 1, which representatively shows a schematic three-dimensional structure diagram of the battery proposed by the present utility model. In this exemplary embodiment, the battery proposed by the present utility model is described by taking an in-vehicle battery as an example. It is easy for those skilled in the art to understand that in order to apply the relevant designs of the present utility model to other types of battery devices, various modifications, additions, substitutions, deletions or other changes are made to the following specific embodiments, and these changes are still within the scope of the principle of the battery proposed by the present utility model.

[0036] As Figure 1 shown, in an embodiment of the present utility model, the battery proposed by the present utility model includes a housing and an electric core (not shown in the drawings). With reference to Figures 2 to 4 , Figure 2 represents a top view of the battery; Figure 3 represents a cross-sectional view taken along the Figure 2 line A-A in Figure 4 ; Figure 3 represents an enlarged schematic view of part B in

[0037] As Figures 1 to 4 shown, in an embodiment of the present utility model, the housing has a receiving space for receiving the electric core. Any outer surface of the housing is coated with an insulating coating 300, and the thickness of the edge region of the insulating coating 300 is less than the thickness of other regions of the insulating coating 300. Through the above structural design, the edge region with a smaller thickness of the insulating coating 300 of the present utility model is generated during the finishing of the coating process. Accordingly, it can be ensured that the insulating coating 300 does not flow to other walls of the housing, while improving the insulation performance of the battery by using the insulating coating 300, ensuring the dimensional specifications of the battery, and avoiding affecting the battery grouping effect.

[0038] As Figures 1 to 4 shown, in an embodiment of the present utility model, the housing includes a body 100 and a cover plate 200. The body 100 has a cavity and is open on one side. The cover plate 200 closes the opening of the body 100 and together with the body 100 forms a receiving space for receiving the electric core.

[0039] As Figures 1 to 4As shown, in one embodiment of the present invention, taking the outer surface of the cover plate 200 coated with the insulating coating 300 as an example, the outer surface of the cover plate 200 is adjacent to the annular area at the edge of the cover plate 200, and the second area 202 is the area of ​​the outer surface of the cover plate 200 enclosed by the first area 201. On this basis, the second area 202 of the outer surface of the cover plate 200 is coated with the insulating coating 300, and the insulating coating 300 has a main body 310 and a thinning portion 320, and the thinning portion 320 is located at the edge of the main body 310 and arranged along the edge of the second area 202. Among them, the thickness H1 of the thinning portion 320 at one end away from the main body 310 is less than the thickness H2 of the other end of the thinning portion 320. Through the above-mentioned structural design, the thinned portion 320 of the insulating coating 300 of the utility model is produced at the end of the coating process, that is, the utility model controls the coating area of ​​the insulating coating on the cover plate 200 within the second area 202, so that the insulating coating 300 on the cover plate 200 will not flow to other wall surfaces of the shell. While utilizing the insulating coating 300 to improve the insulation performance of the battery, the size specifications of the battery are guaranteed to avoid affecting the battery grouping effect.

[0040] It should be noted that the existing coating process is a step-by-step coating process, and the insulating coating is a water-based coating, that is, a fluid material. At the same time, due to the need for a clamping point for the battery, it is impossible to achieve a one-time coating in all directions during the coating process, resulting in traces between the first coated wall and the later coated wall during the coating process (the first coated wall will solidify first, and then the remaining wall will be coated), and an insulating weak point will be formed at the junction of the two parts of the coating that are coated successively. On this basis, since the shoulders of the batteries (i.e., the side walls 120 shown in the accompanying drawings) will come into contact with each other during the battery grouping process, if the above-mentioned weak point is located at the shoulder of the battery, the weak points of the two adjacent batteries after grouping will be opposite, which will affect the insulation effect between the two adjacent batteries. In this regard, by utilizing the structural design of coating the insulating coating 300 with a thinning portion 320 on the second area 202 on the outer surface of the cover plate 200, the utility model can coat the cover plate 200 as the last wall of the shell coating, so that the above-mentioned weak point (which can be understood as Figure 4 The thinned portion 320 shown is away from one end of the main body 310, which can also be understood as Figure 5 The junction of the thinned portion 320 and the insulating layer 400 shown is located on the cover plate 200. Since the cover plate 200 has ample space and the cover plate 200 is provided with other insulating structures such as structural adhesive or insulating parts, the problem of battery insulation failure can be avoided.

[0041] like Figure 4As shown, in an embodiment of the present utility model, in the direction from the main body portion 310 to the first region 201, the thinning portion 320 of the insulating coating 300 may have a gradually decreasing thickness. It should be noted that since the thinning portion 320 of the insulating coating 300 is generated corresponding to the finishing stage in the coating process, for an ideal coating process, the thickness of the thinning portion 320 is in a gradually decreasing form, that is, the surface of the thinning portion 320 facing away from the cover plate 200 has a smooth transition shape, such as an inclined surface or a curved surface, etc. Of course, the above description does not limit the structural form of the thinning portion 320 from a microscopic perspective. That is, from a microscopic perspective, the thickness change form at a certain position of the thinning portion 320 may not be gradually decreasing, and may also be gradually increasing or remaining equal, etc.

[0042] As Figure 4 shown, in an embodiment of the present utility model, the thickness H1 of one end of the thinning portion 320 away from the main body portion 310 may be 50 μm to 200 μm, such as 50 μm, 70 μm, 100 μm, 120 μm, 150 μm, 200 μm, etc. Through the above structural design, the present utility model can avoid the thickness H1 of one end of the thinning portion 320 away from the main body portion 310 being too small, resulting in the inability to ensure the insulation effect at the corresponding position of the cover plate 200, and at the same time can avoid the thickness H1 of one end of the thinning portion 320 away from the main body portion 310 being too large, resulting in the possibility that the insulating coating 300 still flows to other positions of the housing during the coating process. In some embodiments, the thickness H1 of one end of the thinning portion 320 away from the main body portion 310 may also be less than 50 μm, or may be greater than 200 μm, such as 49 μm, 201 μm, etc., and is not limited to this embodiment.

[0043] As Figure 4 shown, in an embodiment of the present utility model, in the direction from the main body portion 310 to the first region 201, the thickness difference between the two ends of the thinning portion 320 (that is, the difference between the thickness H2 of the end of the thinning portion 320 connected to the main body portion 310 and the thickness H1 of the end of the thinning portion 320 away from the main body portion 310) may be 10 μm to 150 μm, such as 10 μm, 20 μm, 50 μm, 70 μm, 100 μm, 150 μm, etc. Through the above structural design, the present utility model can avoid the above thickness difference being too large, which is equivalent to avoiding the thickness H2 of the end of the thinning portion 320 connected to the main body portion 310 being too large, or avoiding the thickness H1 of the end of the thinning portion 320 away from the main body portion 310 being too small. In some embodiments, the thickness difference between the two ends of the thinning portion 320 may also be less than 10 μm, or may be greater than 150 μm, such as 9.5 μm, 151 μm, etc., and is not limited to this embodiment.

[0044] As Figure 2As shown, in one embodiment of the utility model, in the direction from the main body 310 to the first area 201, the width W of the thinning portion 320 of the insulating coating 300 can be 0.5mm to 5mm. For example, 0.5mm, 1mm, 2mm, 3mm, 5mm, etc. Through the above-mentioned structural design, the utility model can avoid the width W of the thinning portion 320 being too large, which may cause the insulation effect of the cover plate 200 at the corresponding position thereof to be unable to be guaranteed, and at the same time, it can avoid the width W of the thinning portion 320 being too small, which may cause the insulating coating 300 to still flow to other positions of the shell during the coating process. In some embodiments, the width W of the thinning portion 320 of the insulating coating 300 may also be less than 0.5mm, or may be greater than 5mm. For example, 0.49mm, 5.1mm, etc., which are not limited to this embodiment.

[0045] See also Figure 5 , Figure 5 A partial enlarged cross-sectional view of a battery housing that can embody the principle of the utility model in another exemplary embodiment is representatively shown in FIG. The specific cutting angle and enlarged area can be referred to in Figure 3 Of Figure 2 The cutting angle and Figure 4 Of Figure 3 magnified area.

[0046] like Figure 5 As shown, in one embodiment of the present invention, the body 100 of the shell includes a bottom wall 110 and a plurality of side walls 120, the plurality of side walls 120 are respectively connected to a plurality of side edges of the bottom wall 110, and the plurality of side walls 120 and the bottom wall 110 together enclose a cavity of the body 100. Accordingly, the plurality of edges of the cover plate 200 are respectively connected to one end of the plurality of side walls 120 facing away from the bottom wall 110. On this basis, an insulating layer 400 may be provided on the outer surface of the side wall 120. Through the above structural design, the present invention can use the insulating layer 400 to provide an insulating effect for the side wall 120 of the shell, thereby further improving the insulation performance of the battery.

[0047] Based on the structural design that the body 100 of the shell includes a bottom wall 110 and a side wall 120, and the side wall 120 is provided with an insulating layer 400, in one embodiment of the utility model, the insulating layer 400 can also be provided on the outer surface of the bottom wall 110. Through the above structural design, the utility model can use the insulating layer 400 to provide an insulating effect for the bottom wall 110 of the shell, further improving the insulation performance of the battery.

[0048] like Figure 5As shown, based on the structural design that the side wall 120 of the housing is provided with an insulating layer 400, in one embodiment of the present utility model, the insulating layer 400 can be formed by coating with insulating paint, that is, the insulating coating 300 and the insulating layer 400 can be formed by successively performing insulating paint coating processes on different parts of the housing, and the insulating layer 400 is formed before the insulating coating 300. Among them, the insulating layer 400 is also provided in the first area 201 of the cover plate 200. Since the insulating coating 300 on the cover plate 200 is only provided on a partial area of ​​the outer surface of the cover plate 200, therefore, for the previous coating process (i.e., for the side wall 120, or for both the side wall 120 and the bottom wall 110), the cover plate 200 can be used as a holding position for the tooling to position the shell, and since the tooling will not block the side wall 120 during the coating process, the coating process of the insulating layer 400 on the side wall 120 can be fully coated, and part of the insulating coating will be coated to the area of ​​the cover plate 200 adjacent to the side wall 120, i.e., the first area 201, thereby forming the above-mentioned insulating layer 400 located in the first area 201. Through the above-mentioned structural design, the utility model can facilitate the positioning of the shell in the coating process, and utilize the above-mentioned structural design to transfer the insulation weak point formed at the junction of the two parts of the coating applied successively (that is, the junction between the end of the thinned portion 320 of the insulating coating 300 away from the main body 310 and the insulation layer 400 located in the first area 201 on the upper surface of the cover plate 200) to the cover plate 200, thereby avoiding the problem of affecting the insulation performance after the battery is grouped when the insulation weak point is located on the side wall 120 of the shell.

[0049] like Figure 5 As shown, in one embodiment of the present invention, in the direction from the middle of the cover plate 200 (e.g., the second region 202) to the edge of the cover plate (e.g., the first region 201), the thickness of the thinning portion 320 can be first reduced and then increased. In other words, the thickness of the thinning portion 320 at the corner where the cover plate 200 meets the side wall is greater than the thickness of the thinnest part of the thinning portion 320. Through the above structural design, since the battery housing is easily bumped at the corner, the insulating coating 300 is worn, resulting in insulation failure. The present invention can avoid the above insulation failure problem by designing that the thickness of the thinning portion 320 is first reduced and then increased, thereby ensuring the insulation effect of the battery.

[0050] See also Figure 6 , Figure 6 A partial enlarged cross-sectional view of a battery housing that can embody the principle of the utility model in another exemplary embodiment is representatively shown in FIG. The specific cutting angle and enlarged area can be referred to in Figure 3 Of Figure 2 The cutting angle and Figure 4 Of Figure 3 magnified area.

[0051] Different fromFigure 5 In the illustrated embodiment, the insulating layer 400 is designed to be formed by coating. For example, Figure 6 as shown, in an embodiment of the present invention, still taking the side wall 120 of the housing provided with the insulating layer 400 as an example, the insulating layer 400 may be an insulating film adhered to the outer surface of the side wall 120. Among them, the insulating film can be ensured to be only located on the side wall 120 through process means (such as control of cutting shape and pasting position), and may not be located on the cover plate 200. Of course, it can also be partially adhered to the first region 201 on the upper surface of the cover plate 200.

[0052] It should be noted that, in Figures 4 to 6 the illustrated structure, in order to facilitate the observation and understanding of the structural patterns of the insulating coating 300 and the insulating layer 400, their thickness dimensions are exaggerated, that is, the thickness relationship between the insulating coating 300 and the insulating layer 400 and the housing wall surface in the actual product of the present invention may not be the state shown in the drawings.

[0053] It should be noted here that the batteries shown in the drawings and described in this specification are only a few examples of the many batteries that can adopt the principle of the present invention. It should be clearly understood that the principle of the present invention is by no means limited to any details or any components of the batteries shown in the drawings or described in this specification.

[0054] In summary, the battery proposed by the present invention has an insulating coating 300 coated on any outer surface of the housing, and the thickness of the edge region of the insulating coating 300 is smaller than the thickness of other regions of the insulating coating 300. Through the above structural design, the edge region with a smaller thickness of the insulating coating 300 of the present invention is generated during the finishing of the coating process. Accordingly, it can be ensured that the insulating coating 300 will not flow to other wall surfaces of the housing, while improving the insulation performance of the battery by using the insulating coating 300, ensuring the size specifications of the battery, and avoiding affecting the grouping effect of the battery.

[0055] Based on the above detailed description of several exemplary embodiments of the battery proposed by the present invention, the following will describe an exemplary embodiment of the battery device proposed by the present invention.

[0056] In an embodiment of the present invention, the battery device proposed by the present invention includes the battery proposed by the present invention.

[0057] It should be noted here that the battery devices shown in the drawings and described in this specification are only a few examples of the many battery devices that can adopt the principle of the present invention. It should be clearly understood that the principle of the present invention is by no means limited to any details or any components of the battery devices shown in the drawings or described in this specification.

[0058] In summary, for the battery device proposed by the present utility model, by using the battery proposed by the present utility model, it is possible to improve the insulation performance of the battery by using an insulating coating while ensuring the size specifications of the battery and avoiding affecting the battery grouping effect.

[0059] The above has described and / or illustrated in detail the exemplary embodiments of the battery and battery device proposed by the present utility model. However, the embodiments of the present utility model are not limited to the specific embodiments described herein. On the contrary, each component and / or step of each embodiment can be used independently and separately from the other components and / or steps described herein. Each component and / or each step of one embodiment can also be combined with the other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, terms such as "a", "one", and "the above" are used to indicate the existence of one or more elements / components / etc. The terms "comprising", "including", and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc. Furthermore, the terms "first", "second", etc. in the claims and the specification are only used as labels and are not numerical limitations on their objects.

[0060] Although the battery and battery device proposed by the present utility model have been described according to different specific embodiments, those skilled in the art will recognize that modifications can be made to the implementation of the present utility model within the spirit and scope of the claims.

Claims

1. A battery, characterized in that: The invention comprises a shell and a battery cell, wherein the shell comprises a body and a cover plate, the body has a cavity and one side is open, the cover plate closes the opening of the body and forms a storage space for the battery cell together with the body; The outer surface of the cover plate has a first area and a second area, the first area is an annular area adjacent to the edge of the outer surface, and the second area is an area of ​​the outer surface of the cover plate enclosed by the first area; the second area of ​​the outer surface of the cover plate is coated with an insulating coating, and the insulating coating has a main body and a thinning part, the thinning part is located at the edge of the main body and arranged along the edge of the second area, and the thickness of one end of the thinning part away from the main body is less than the thickness of the other end of the thinning part.

2. The battery according to claim 1, characterized in that The thickness of the thinned portion gradually decreases in a direction from the main body to the first region.

3. The battery according to claim 1, characterized in that The thickness of the thinned portion at one end away from the main body portion is 50 μm to 200 μm.

4. The battery according to claim 1, characterized in that In a direction from the main body to the first region, a thickness difference between two ends of the thinned portion is 10 μm to 150 μm.

5. The battery according to claim 1, characterized in that In a direction from the main body to the first region, a width of the thinned portion is 0.5 mm to 5 mm.

6. The battery according to claim 1, characterized in that The main body includes a bottom wall and multiple side walls, the multiple side walls are respectively connected to the multiple side edges of the bottom wall, and together with the bottom wall enclose the cavity, and the multiple edges of the cover plate are respectively connected to the ends of the multiple side walls facing away from the bottom wall; wherein the outer surface of the side wall is provided with an insulating layer.

7. The battery according to claim 6, characterized in that In the direction from the middle of the cover plate to the edge of the cover plate, the thickness of the thinned portion first decreases and then increases.

8. The battery according to claim 6, characterized in that The insulating layer is an insulating film adhered to the outer surface of the side wall.

9. The battery according to claim 6, characterized in that The insulating layer is also arranged on the outer surface of the bottom wall.

10. A battery device, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

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