Insulation protection piece and battery

Abstract

The present application relates to an insulating shield for a battery, characterized in that it comprises one or more insulating materials, the insulating shield being configured as a single-piece structure or as a multi-piece structure comprising two or more sub-insulating shields, the insulating shield at least partially covering the battery, the shape of the insulation protection piece follows the shape of the part, covered by the insulation protection piece, of the battery, and the insulation protection piece can be formed into a three-dimensional structure and is tightly attached to the part of the battery.

Description

Technical Field

[0001] The present application relates to the field of safety protection of vehicle batteries, and more specifically to the field of insulation protection of batteries. Background Art

[0002] Electric vehicles have great advantages in energy conservation and environmental protection, and are increasingly favored by people. The safety of batteries is receiving more and more attention, especially the thermal runaway problem of batteries. Therefore, how to design batteries and insulate batteries to further improve battery safety and ensure the personal safety of passengers is a problem of continuous concern in this field.

[0003] The information provided in this section is for the purpose of generally presenting the background of the present application and therefore may contain information that does not constitute prior art in the art. Utility Model Content

[0004] The purpose of this application is to solve or at least alleviate the problems existing in the prior art.

[0005] On one hand, the present application relates to an insulating protective member for a battery, characterized in that it includes one or more insulating materials, the insulating protective member is constructed as a single-piece structure or is constructed as a multi-piece structure including two or more sub-insulating protective members, the insulating protective member at least partially covers the battery, and the shape of the insulating protective member follows the shape of the portion of the battery it covers.

[0006] In the insulating protective member according to the present application, optionally, the one or more insulating materials include a flexible insulating material, the flexible insulating material is formed by a pultrusion or extrusion process, and the insulating protective member is formed into a three-dimensional structure.

[0007] In the insulating protective member according to the present application, optionally, the insulating protective member is tightly fitted to the portion of the battery it covers.

[0008] In the insulating protective member according to the present application, optionally, the insulating protective member is bonded to the portion of the battery covered by it, and / or the insulating protective member is fixed to the battery by a fastener to be in direct contact with the portion of the battery covered by it.

[0009] In the insulating protective member according to the present application, optionally, the insulating protective member has an irregular shape, wherein the insulating protective member further includes an avoidance structure.

[0010] In the insulating protective member according to the present application, optionally, the insulating protective member is a closed three-dimensional structure that integrally covers the battery or a component of the battery, and / or, the insulating protective member is an open three-dimensional structure that partially covers the battery.

[0011] In the insulating protective member according to the present application, optionally, the insulating protective member is located at one or more positions of the module upper cover, the battery cell connecting piece, the end plate, the side plate, the battery upper shell, the battery lower shell, and the copper busbar.

[0012] In the insulating protective member according to the present application, optionally, the insulating protective member is located on the battery cell connecting piece and serves as a module upper cover.

[0013] In the insulating protective member according to the present application, optionally, the insulating material includes one or more of mica board, mica roll, ceramic silicone rubber, TC composite tape, and high temperature resistant plastic, and the insulating protective member is formed by the one or more insulating materials in a stacked manner.

[0014] Another aspect of the present application also relates to a battery, which comprises the insulating protective member described in any one of the above contents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The disclosure of the present application will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0016] Figure 1 A schematic diagram showing the installation of an insulating protective member according to an embodiment of the present application is shown;

[0017] Figure 2 A top view of an insulating protective member according to an embodiment of the present application is shown;

[0018] Figure 3 A front view of an insulating protective member according to an embodiment of the present application is shown;

[0019] Figure 4 A vertical view showing an insulating protective member according to an embodiment of the present application;

[0020] Figure 5 A top view showing an insulating protective member according to another embodiment of the present application;

[0021] Figure 6 A schematic diagram showing the installation of an insulating protective member according to another embodiment of the present application is shown;

[0022] Figure 7a A schematic diagram showing the installation of an insulating protective member according to another embodiment of the present application is shown;

[0023] Figure 7b Show Figure 7a An exploded view of an embodiment of the invention.

[0024] Explanation of the reference numerals: 100 battery cell, 101 connecting sheet between battery cells, 102 battery inner channel, 200, 300, 400 insulating protective parts, 201 recess, 202, 301 avoidance structure, 203 bending structure, 3001, 3002 sub-insulating protective parts. DETAILED DESCRIPTION

[0025] First of all, it should be noted that the composition, characteristics and advantages of the insulating protective parts and batteries according to the present application will be described below in an exemplary manner, but it should be understood that all descriptions are given for illustration only and should not be construed as forming any limitation on the present application. In this article, the technical terms "first" and "second" are only used for distinguishing purposes and are not intended to indicate their order and relative importance. The technical term "connected (or connected, etc.)" covers a specific component directly connected to another component and / or indirectly connected to another component. In addition, unless otherwise clearly specified and limited, the dimensions, directions or positional relationships indicated by the technical terms "length", "width", "height", "upper", "top", "bottom", etc. are based on the dimensions, orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as limitations on the present application.

[0026] In addition, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the drawings, the present application still allows any combination or deletion between these technical features (or their equivalents) without any technical obstacles, thereby obtaining more other embodiments of the present application that may not be directly mentioned herein. In addition, general matters that are already known to those skilled in the art will not be repeated herein.

[0027] When a vehicle experiences thermal runaway, the out-of-control battery cell will emit high-temperature gas and ejecta, and the ejecta often contain metal impurities. If there is exposed metal in the battery, such as copper or aluminum bars, arcing will occur, causing safety accidents such as battery fire. Insulation protection can be used to avoid arcing and other problems.

[0028] One aspect of the present application relates to an insulating protective member for a battery. The insulating protective member may be composed of one or more insulating materials, including one or more of mica plates, mica rolls, ceramic silicone rubber, TC composite tapes, and high temperature resistant plastics. Regarding the form of the insulating protective member, it may be constructed as a single-piece structure, or it may be constructed as a multi-piece structure including two, three or any suitable number of multiple sub-insulating protective members. The insulating protective member may cover any position of the battery that requires insulating protection, and may also cover at least a partial area of ​​the battery, and the shape of the insulating protective member may completely or substantially completely or partially follow the shape of the portion of the battery it covers. The term "follow" as used herein means being similar or identical or substantially similar or identical in shape. For example, when structure A is formed close to or adjacent to structure B, the shape of structure A may be said to follow structure B, wherein structure A may be larger or smaller than or the same size as structure B. The advantage of this arrangement is that, according to the overall structural arrangement of the battery, the insulating protective member can be used to insulate the battery as a whole, or to partially or partially protect the battery; in addition, the insulating protective member can be further arranged (for example, pasted) on one or more parts of the battery, such as the upper cover of the battery module, the cell connector, the end cover, the side plate, the upper shell of the battery, the lower shell of the battery, the inner channel of the battery, etc., where the copper busbar is located at the inner channel of the battery, and the insulating protective member can be arranged at the copper busbar instead of at the inner channel of the battery. In one embodiment, as Figure 1 As shown in FIG. 1 , the insulating protective member 200 for a battery may include two insulating protective members 200 and 201 located at the inner channel 102 of the battery (eg, Figure 1 As shown), located at the battery cell connecting piece 101 (as shown Figure 7a and Figure 7b The two sub-insulating protective parts are independent of each other, and such an insulating protective part is a multi-piece structure.

[0029] See also Figure 1 and Figure 2 In one embodiment, the insulating protective member 200 is disposed at the battery inner channel 102, and the battery includes one or more battery cells 100. The insulating protective member 200 can cover the copper bar (not shown) at the battery inner channel 102 to insulate and protect the copper bar, which is part of the battery, that is, the insulating protective member can partially cover the battery. Figure 1 As can be seen from the embodiment shown in FIG. 1 , the insulating protective member 200 can be formed into an irregular three-dimensional structure, the shape of which corresponds to and matches the overall shape of the copper busbar at the covered battery inner channel 102, and follows or avoids other attached structures. Specifically, see Figures 1 to 4The insulating protective member 200 is provided with a recess 201, an avoidance structure 202 and a bending structure 203. Through this arrangement, the insulating protective member 200 can better follow the shape of the object to be insulated and protected, so as to better fit the object to be insulated and protected, thereby making the overall structure of the battery more compact and achieving better insulation protection effect, and being able to better reduce material usage, reduce overall cost and weight.

[0030] The insulating guard may include one or more insulating materials, wherein the one or more insulating materials include a flexible insulating material, which may be formed by a pultrusion or extrusion process, and then the insulating guard may be advantageously formed into a three-dimensional structure, such as Figures 1 to 4 The insulating protection member 200 shown in the figure is designed in a three-dimensional structure according to the location or object to be protected by the insulating protection member. In addition, the one or more insulating materials may also include a rigid insulating material.

[0031] According to the embodiment of the present application, the insulating protective member can fit closely with the part of the battery it covers. On the one hand, because it can be formed into a shape corresponding to the shape of the part of the battery it covers through a processing technology, on the other hand, because it can be fixed to the battery by bonding or the like, such as bonding to the part of the battery it covers, this method is further conducive to its close fit with the object of insulation protection. In addition, the fixing method of the insulating protective member also includes fixing it to the battery by fasteners (such as threaded fasteners, riveted fasteners) so as to be in direct contact with the part of the battery it covers. The insulating protective member of the present application can have a regular or irregular shape, especially to adapt to the shape and structure of various parts of the battery. The insulating protective member of the present application can have an irregular shape, for example, including avoidance structures (202, 301) of various shapes, which can avoid the shapes of, for example, the wiring, connection structure, mounting structure, fixing structure and other components of the battery. The insulating protective member of the present application can also have a regular shape, such as a rectangular or substantially rectangular planar structure, which can be applied to parts with a relatively flat exterior or a relatively regular shape.

[0032] The insulating protective member according to the embodiment of the present application may have a substantially closed three-dimensional structure or an open three-dimensional structure. The term "closed three-dimensional structure" used herein means that the three-dimensional structure covers more than 50% of the surface area of ​​the structure it protects, and the term "open three-dimensional structure" used herein means that the three-dimensional structure covers no more than 50% of the surface area of ​​the structure it protects. Therefore, the insulating protective member can surround the object to be insulated and protected to insulate it, or cover a part of the object to be insulated and protected (such as an exposed surface) to insulate it. The protected object can be the battery as a whole or one or some components or parts of the battery.

[0033] According to another embodiment of the present application, as shown in Figure 5 and Figure 6 The insulating protective member 300 in this article may also be a planar structure, such as Figure 5 and Figure 6 As shown in , it may have an irregular shape and may have an avoidance structure 301. In addition, the insulating protective member in the embodiment of the present application may be integral or segmented, such as Figure 6 As shown in FIG. 1 , the insulating shield includes two separate sub-insulating shields 3001 and 3002 .

[0034] In another embodiment of the present application, optionally, Figure 7a and Figure 7b As shown, when the insulating protective member 400 is located at the battery cell connection sheet 101, the insulating protective member 400 can serve as a module cover, thereby replacing the original module cover structure. The insulating protective member 400 has a better insulating protection effect than the module cover due to its higher temperature resistance.

[0035] According to another aspect of the present application, a battery is also disclosed, which may include one or more of the insulating protective members in the above embodiments. The battery described herein may also be referred to as a power battery, a battery pack, etc.

[0036] The specific embodiments described above in this application are only for more clearly describing the principles of this application, wherein each component is clearly shown or described to make the principles of this application easier to understand. Without departing from the scope of this application, those skilled in the art can easily make various modifications or changes to this application. Therefore, it should be understood that these modifications or changes should be included in the scope of patent protection of this application.

Claims

1. An insulating protective member for a battery, characterized in that: The insulating protective member is formed of one or more insulating materials in a laminated manner, the insulating protective member is constructed as a single-piece structure or as a multi-piece structure including two or more sub-insulating protective members, the insulating protective member at least partially covers the battery, and the shape of the insulating protective member follows the shape of the portion of the battery covered by the insulating protective member. The insulating protective member is provided with: a bending structure, an avoidance structure and a recessed portion.

2. The insulating protective member according to claim 1, wherein: The one or more insulating materials include a flexible insulating material formed by a pultrusion or extrusion process.

3. The insulating protective member according to claim 1, wherein: The insulating protective member is in close contact with the portion of the battery it covers.

4. The insulating protective member according to claim 3, wherein: The insulating protective member is bonded to the portion of the battery it covers, and / or the insulating protective member is fixed to the battery by a fastener so as to be in direct contact with the portion of the battery it covers.

5. The insulating protective member according to claim 1, wherein: The insulating protective member is located at one or more positions of the module upper cover, the battery core connecting piece, the end plate, the side plate, the battery upper shell, the battery lower shell, and the copper busbar.

6. The insulating protective member according to claim 5, wherein: The insulating protective member is located on the battery core connecting piece and serves as a module upper cover.

7. The insulating protective member according to claim 1, wherein: The insulating material includes one of mica board, mica roll, ceramic silicone rubber, TC composite tape and high temperature resistant plastic.

8. A battery comprising the insulating protective member according to any one of claims 1 to 7.

Images