Insulation supporting structure and battery

Abstract

The utility model provides an insulating support structure and a battery, relates to the technical field of batteries, and aims to solve the problems that when a battery cell is in thermal runaway, the exhaust space of an exhaust port of an anti-explosion valve is easily reduced and even blocked, and the battery explodes to a certain extent. The insulating support structure provided by the utility model is used for a battery and comprises an insulating film and a stop component, the insulating film is arranged in the shell of the battery and is positioned between the pole group of the battery and the shell; the stop component is arranged on the insulating film, the stop component protrudes out of the plane where the insulating film is located, and the stop component is arranged towards the shell and / or the pole group.

Description

Technical Field

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

[0002] Existing batteries are all equipped with explosion-proof valves. When the internal electrode group produces thermal runaway, the generated heat and gas can be discharged through the explosion-proof valve to avoid battery explosion to a certain extent.

[0003] However, in existing batteries, there is only one insulating film between the electrode group and the explosion-proof valve on the side of the shell. Once thermal runaway occurs, the temperature inside the battery cell can reach 400°C, which is enough to melt the insulating film. Once the insulating film melts, it will lose its support for the electrode group. Under the influence of internal pressure difference and the gravity of the electrode group itself, it is very easy to move toward the direction close to the explosion-proof valve, thereby reducing the exhaust space of the explosion-proof valve or even blocking the exhaust port of the explosion-proof valve, causing the shell to tear, catch fire or even explode.

[0004] Therefore, there is an urgent need to provide an insulating support structure and a battery to solve the problems existing in the prior art to a certain extent. Utility Model Content

[0005] The utility model aims to provide an insulating support structure and a battery, so as to solve to a certain extent the problem that when the battery core is thermally runaway, the exhaust space of the exhaust port of the explosion-proof valve is easily reduced or even blocked, causing the battery to explode.

[0006] The utility model provides an insulating support structure for a battery, comprising an insulating film and a stop member; the insulating film is arranged in a shell of the battery and is located between a pole group of the battery and the shell; the stop member is arranged on the insulating film, the stop member protrudes from the plane where the insulating film is located, and the stop member is arranged toward the shell and / or toward the pole group.

[0007] There are multiple stopper components, and the multiple stopper components are distributed on the insulating film.

[0008] Specifically, at least one of the stopper members is located on a side of the explosion-proof valve in the battery.

[0009] Furthermore, the distance between the stop member and the explosion-proof valve is between 15 mm and 100 mm.

[0010] Wherein, when the stopping member is arranged toward the shell, the stopping member includes a main body portion, and the main body portion is in an L-shaped or C-shaped structure.

[0011] Specifically, when the stop member is disposed toward the pole group, the stop member further includes a reinforcement portion, and the reinforcement portion and the main body portion form a hole-shaped or sun-shaped structure.

[0012] Specifically, the cross-section of the main body is rectangular or non-rectangular, and when the cross-section of the main body is rectangular, the width of the insulating film is B, the width of the main body is A, the thickness is D, and the length is C, 0.3B≤A≤0.7B, C≥5mm, D≥0.5mm; when the cross-section of the main body is non-rectangular, 0.3B≤A≤B, C≥5mm, D≥1mm.

[0013] Furthermore, the stop member and the insulating film are of a split structure, and the insulating film is made of PP / PE / PET material, and the stop member is made of a material that is resistant to high temperature and electrolyte corrosion.

[0014] Furthermore, the stopping member and the insulating film are connected by bonding or hot melting.

[0015] Compared with the prior art, the insulating support structure provided by the utility model has the following advantages:

[0016] The insulating support structure provided by the utility model is used for a battery, and comprises an insulating film and a stop member; the insulating film is arranged in a battery shell and is located between a pole group of the battery and the shell; the stop member is arranged on the insulating film, the stop member protrudes from the plane where the insulating film is located, and the stop member is arranged toward the shell and / or toward the pole group.

[0017] From this analysis, it can be seen that by setting an insulating film between the pole group and the shell, the pole group and the shell can be isolated, avoiding contact between the pole group and the shell, and making the shell charged. By setting a stopper on the insulating film, and the stopper can be set toward the shell, toward the pole group, or toward both the pole group and the shell, that is, set on both sides of the insulating film, when the pole group has thermal runaway and the insulating film melts, the stopper can still be supported between the pole group and the shell, so as to avoid the pole group from moving toward the shell due to deformation and pressure difference to a certain extent, reducing the exhaust space of the explosion-proof valve or even blocking the exhaust port of the explosion-proof valve.

[0018] In addition, the utility model also provides a battery, including a shell, a pole group, an explosion-proof valve and the above-mentioned insulating support structure; the pole group and the insulating support structure are arranged in the shell, and the insulating film isolates the shell and the pole group; the shell is provided with an explosion-proof valve, and the stop member is arranged corresponding to the explosion-proof valve.

[0019] The battery using the insulating support structure provided by the present application can achieve the function of isolating the shell and the pole group and also provide a certain degree of support to the pole group through the insulating film and the stop member in the normal use state. When the battery produces thermal runaway and the insulating film melts, the remaining stop member can still support the shell and the pole group to a certain extent, preventing the pole group from moving toward the shell under the action of the air pressure difference and its own gravity, thereby ensuring the exhaust space of the explosion-proof valve to a certain extent, and avoiding the problem of the battery shell breaking, catching fire or even exploding due to the blockage of the exhaust port of the explosion-proof valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of two implementation modes of a stop member in an insulating support structure provided by an embodiment of the utility model;

[0022] Figure 2 Structural schematic diagrams of four implementation modes of a stop member in an insulating support structure provided in an embodiment of the utility model.

[0023] In the figure: 1-insulating film; 2-stopping member. DETAILED DESCRIPTION

[0024] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0025] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0029] For ease of description, spatial relative terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the drawings. Such spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0030] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0031] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0032] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection required by the present application.

[0033] like Figure 1 As shown, the utility model provides an insulating support structure, including a pole group, an insulating film 1, a stop member 2 and a shell; the pole group is arranged in the shell, and the insulating film 1 is located between the pole group and the shell to separate the pole group and the shell; the stop member 2 is arranged on the insulating film 1, the stop member 2 protrudes from the plane where the insulating film 1 is located, and the stop member 2 is arranged toward the shell and / or toward the pole group; the stop member 2 is made of a high temperature resistant and electrolyte corrosion resistant material.

[0034] Compared with the prior art, the insulating support structure provided by the utility model has the following advantages:

[0035] The insulating support structure provided by the utility model can isolate the pole group and the shell by setting an insulating film 1 between the pole group and the shell, so as to prevent the pole group from contacting the shell and making the shell charged. And by setting a stopper member 2 on the insulating film 1, and the stopper member 2 can be set toward the shell, can be set toward the pole group, or can be set toward the pole group and the shell at the same time, that is, it is set on both sides of the insulating film 1, and the stopper member 2 is made of a high temperature resistant and electrolyte corrosion resistant material, so that when the pole group has thermal runaway and causes the insulating film 1 to melt, the stopper member 2 can still be supported between the pole group and the shell, so as to avoid the pole group from moving in the direction close to the shell due to deformation and air pressure to a certain extent, reducing the exhaust space of the explosion-proof valve or even blocking the exhaust port of the explosion-proof valve.

[0036] It can be understood that no matter which side the stop member 2 is set to, when the insulating film 1 has not melted and failed, the pole group and the shell can be separated, that is, when the stop member 2 is set toward the pole group, the insulating film 1 separates the stop member 2 and the shell, and when the stop member 2 is set toward the shell, the insulating film 1 separates the stop member 2 and the pole group. Therefore, even if the stop member 2 in the present application is made of metal material, it will not cause the pole group and the shell to be connected, thereby ensuring the stability of the overall battery use.

[0037] Alternatively, if Figure 1 As shown, there are multiple stopper members 2 in the present application, and the multiple stopper members 2 are distributed on the insulating film 1 .

[0038] Preferably, the multiple stop members 2 in the present application can be evenly distributed on the insulating film 1, so that when the insulating film 1 melts and fails, it can provide uniform support to the electrode group, so as to ensure that the position between the electrode group and the explosion-proof valve is fixed or has a small variation range to a certain extent, thereby ensuring the pressure relief and exhaust effect of the explosion-proof valve and ensuring the stability of the overall battery.

[0039] Optionally, among the multiple stopping members 2 in the present application, at least one stopping member 2 is located on a side of the explosion-proof valve in the battery.

[0040] By locating the stop member 2 at the side of the explosion-proof valve, it can be fully ensured that the electrode group within the space range of the explosion-proof valve will not move toward the explosion-proof valve, thereby ensuring the exhaust space of the explosion-proof valve and improving the overall safety of the battery.

[0041] Preferably, both ends of the explosion-proof valve in the present application are provided with a stop member 2, so as to stably support the area of ​​the explosion-proof valve, and at least avoid the problem that the pole group moves in the area corresponding to the explosion-proof valve toward the direction close to the explosion-proof valve. Further preferably, the distance between the stop member 2 in the present application and the explosion-proof valve is between 15mm and 100mm to ensure stable support for the explosion-proof valve.

[0042] Based on the above structure, Figure 2 As shown, the present application provides two implementations of the stop member 2. Optionally, when the stop member 2 is disposed toward the housing, the stop member 2 includes a main body portion, and the main body portion is in an L-shaped or C-shaped structure.

[0043] When the stop member 2 is set toward the shell, the stop member 2 plays a role of separation and support after the insulating film 1 melts, and does not need to bear the main support role for the electrode group under normal use. Therefore, by making the main body L-shaped or C-shaped, the weight and consumables of a single stop member 2 can be greatly reduced, thereby reducing the weight and manufacturing cost of the overall battery to a certain extent.

[0044] It can be understood that the L-shape or C-shape of the main body mentioned above in the present application are only two of the achievable implementation methods. According to the actual manufacturing situation, a structural form that is more conducive to molding, such as a straight-line shape, can be selected, which will not be repeated here.

[0045] Based on the above structure, Figure 2As shown, the present application provides another implementation of the stop member 2. Optionally, when the stop member 2 is disposed toward the pole group, the stop member 2 further includes a reinforcement portion, and the reinforcement portion and the main body portion form a hole-shaped or sun-shaped structure.

[0046] Since the stop member 2 is arranged toward the pole group and also needs to support the pole group to a certain extent, a reinforcing portion is further installed on the main body so that the reinforcing portion cooperates with the main body to form a hole-shaped or sun-shaped structure or other structure with one or more reinforcing ribs, thereby being able to ensure the support for the pole group to a certain extent.

[0047] Furthermore, when the stop member 2 in the present application adopts a mouth-shaped structure, since the mouth-shaped structure is a hollow structure, it can also ensure to a certain extent that the weight of the stop member 2 will not increase excessively.

[0048] Alternatively, if Figure 1 As shown, the cross-section of the main body in the present application is rectangular or non-rectangular, and when the cross-section of the main body is rectangular, the width of the insulating film 1 is B, the width of the main body is A, the thickness is D, the length is C, 0.3B≤A≤0.7B, C≥5mm, D≥0.5mm; when the cross-section of the main body is non-rectangular, 0.3B≤A≤B, C≥5mm, D≥1mm.

[0049] It can be understood that the stop member 2 and the insulating film 1 in the present application can be a split structure, and when the stop member 2 and the insulating film 1 are separately arranged, the insulating film 1 in the present application is made of PP / PE / PET material, and accordingly, the stop member 2 is made of high temperature resistant and electrolyte corrosion resistant material.

[0050] The insulating film 1 and the stop member 2 can be connected, or they can be independently arranged between the shell and the pole group. However, in order to ensure that the position between the stop member 2 and the insulating film 1 is fixed and to prevent the stop member 2 from moving around at will, the stop member 2 in the present application is connected to the insulating film 1 by bonding or hot melting, so as to ensure the position of the stop member 2 relative to the insulating film 1, and further ensure the supporting effect on the explosion-proof valve.

[0051] It should be noted here that the above-mentioned stop member 2 in the present application is made of high-temperature resistant and electrolyte corrosion-resistant materials, which means aluminum alloy, stainless steel and other metal materials. It can be understood that, regardless of which side of the insulating film 1 the stop member 2 in the present application is arranged on, the insulating film 1 can achieve sufficient isolation between the pole group and the shell under normal use conditions. Therefore, it can be satisfied that the stop member 2 is made of the above-mentioned metal material.

[0052] In addition, the utility model also provides a battery, including a shell, a pole group, an explosion-proof valve and the above-mentioned insulating support structure; the pole group and the insulating support structure are arranged in the shell, and the insulating film 1 isolates the shell and the pole group; the shell is provided with an explosion-proof valve, and the stop member 2 is arranged corresponding to the explosion-proof valve.

[0053] The battery using the insulating support structure provided by the present application can not only isolate the shell and the pole group, but also support the pole group to a certain extent through the insulating film 1 and the stop member 2 in the normal use state. When the battery produces thermal runaway and the insulating film 1 melts, the remaining stop member 2 can still support the shell and the pole group to a certain extent, avoiding the tendency of the pole group to move toward the shell under the action of the air pressure difference and its own gravity, thereby ensuring the exhaust space of the explosion-proof valve to a certain extent, avoiding the problem of the battery shell breaking, catching fire or even exploding due to the blockage of the exhaust port of the explosion-proof valve.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An insulating support structure for a battery, characterized in that: comprising an insulating film and a stopper member; The insulating film is arranged in the housing of the battery and between the electrode group and the housing of the battery; The stop member is arranged on the insulating film, the stop member protrudes from the plane where the insulating film is located, and the stop member is arranged toward the shell and / or toward the pole group.

2. The insulating support structure according to claim 1, characterized in that: There are a plurality of the stopping members, and the plurality of the stopping members are distributed on the insulating film.

3. The insulating support structure according to claim 2, characterized in that: At least one of the stopper members is located at a side of an explosion-proof valve in the battery.

4. The insulating support structure according to claim 3, characterized in that: The distance between the stop member and the explosion-proof valve is between 15 mm and 100 mm.

5. The insulating support structure according to claim 1, characterized in that: When the stopping member is disposed toward the shell, the stopping member includes a main body portion, and the main body portion is in an L-shaped or C-shaped structure.

6. The insulating support structure according to claim 5, characterized in that: When the stop member is disposed toward the pole group, the stop member further includes a reinforcement portion, and the reinforcement portion and the main body portion form a hole-shaped or a sun-shaped structure.

7. The insulating support structure according to claim 5, characterized in that: The cross section of the main body is rectangular or non-rectangular, and when the cross section of the main body is rectangular, the width of the insulating film is B, the width of the main body is A, the thickness is D, the length is C, 0.3B≤A≤0.7B, C≥5mm, D≥0.5mm; When the cross-section of the main body is non-rectangular, 0.3B≤A≤B, C≥5mm, and D≥1mm.

8. The insulating support structure according to claim 1, characterized in that: The stop member and the insulating film are of separate structures, and the insulating film is made of PP / PE / PET material, and the stop member is made of a material that is resistant to high temperature and electrolyte corrosion.

9. The insulating support structure according to claim 1, characterized in that: The stopping member is connected to the insulating film by bonding or hot melting.

10. A battery, characterized in that: It comprises a housing, a pole group, an explosion-proof valve and an insulating support structure as described in any one of claims 1 to 9; The pole group and the insulating support structure are arranged in the shell, and the insulating film isolates the shell and the pole group; An explosion-proof valve is arranged on the shell, and the stop member is arranged corresponding to the explosion-proof valve.

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