Protective upper cover of battery module

Abstract

The utility model provides a protective upper cover of a battery module, which is used for the battery module consisting of lithium batteries, the battery module is provided with a battery safety valve arranged upwards, and the protective upper cover is characterized by comprising an upper cover body made of an insulating material, the upper cover body covers the upper part of the battery module, and the battery safety valve is arranged on the upper part of the upper cover body. An upper cover body is provided with an upper cover explosion-proof opening corresponding to the position of the battery safety valve, the upper cover explosion-proof opening is provided with a safety cover for closing the upper cover explosion-proof opening, and the safety cover is connected with the upper cover body through a destructible part. And after the destructible part is destroyed by the sprayed object released by the battery safety valve, the upper cover explosion-proof opening is opened so as to discharge the sprayed object to the outside of the upper cover body. According to the battery module disclosed by the utility model, sprayed objects are discharged from the explosion-proof opening of the upper cover, so that the sprayed objects can be isolated outside the battery module, damage to the battery module is reduced as much as possible, the probability of fire accidents is reduced, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to a battery module protection device, in particular to a protective upper cover of a battery module. Background Art

[0002] Lithium-ion power batteries have been widely used in the field of energy storage. They are important technologies and basic equipment to help develop renewable energy and build new power systems. The design of energy storage systems is an important support for the development of energy storage technology. Safety risks and their evolution exist in any link of the entire life cycle process, such as equipment selection, system integration, etc. in energy storage power stations. In the design, construction and operation of energy storage systems, technical standards should be strictly implemented and preventive designs should be made. Existing lithium battery modules are equipped with an upward-facing battery safety valve. When a lithium battery is short-circuited or overcharged, the internal heat and gas of the lithium battery will be generated, causing the internal electrolyte, lithium ions and combustible gases to be ejected from the battery safety valve. These ejected materials may cause the external circuit of the battery module to short-circuit and catch fire, and these ejected materials need to be isolated from the battery module.

[0003] The above information disclosed in the background technology section is only used to enhance the understanding of the background of the present invention and therefore it may include information that does not constitute the prior art known to a person of ordinary skill in the art. Summary of the invention

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide a protective upper cover for a battery module which can isolate the ejected material from the battery module.

[0005] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present invention.

[0006] According to one aspect of the utility model, a protective upper cover of a battery module is provided, which is used for a battery module composed of lithium batteries, wherein the battery module has a battery safety valve arranged upward, and is characterized in that the protective upper cover comprises an upper cover body made of insulating material, the upper cover body covers the top of the battery module, an upper cover explosion-proof opening corresponding to the position of the battery safety valve is provided on the upper cover body, the upper cover explosion-proof opening is provided with a safety cover for closing the upper cover explosion-proof opening, the safety cover is connected to the upper cover body by a destructible part, and after the ejection released by the battery safety valve destroys the destructible part, the upper cover explosion-proof opening is opened to discharge the ejection to the outside of the upper cover body.

[0007] According to an embodiment of the present invention, the upper cover body is a sheet-like structure.

[0008] According to an embodiment of the present invention, the safety cover and the upper cover body are an integrated structure.

[0009] According to an embodiment of the present utility model, the destructible portion is a short arm between the safety cover and the upper cover body, and the width of the short arm is less than one fifth of the width of the safety cover.

[0010] According to an embodiment of the present utility model, a notch is provided between the safety cover and the upper cover body.

[0011] According to an embodiment of the present utility model, a semi-transparent structure is formed between the safety cover and the upper cover body.

[0012] According to an embodiment of the present utility model, the safety cover comprises a base and a cover body, the base is fixedly connected to the upper cover body, and the cover body and the base are connected via a connecting arm.

[0013] According to an embodiment of the present invention, the base is bonded to the upper cover body.

[0014] According to an embodiment of the present invention, the upper cover body is made of PC, PP, PE, nylon and plastic.

[0015] According to an embodiment of the present invention, the upper cover body includes a plane portion and side baffles located on both sides of the plane portion, and the side baffles are located on the outside of the lithium battery.

[0016] It can be seen from the above technical solution that the advantages and positive effects of the utility model are:

[0017] The protective upper cover of the utility model can isolate the ejected matter outside the battery module by allowing the ejected matter to be discharged from the explosion-proof opening of the upper cover, thereby minimizing the damage to the battery module, reducing the probability of fire accidents, and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the assembly of the battery module and the protective upper cover of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the protective cover;

[0021] Figure 3 is a schematic diagram of the main view of the protective cover;

[0022] Figure 4 yes Figure 3 A partial enlarged view of point I in the middle.

[0023] In the figure: 10, upper cover body; 20, safety cover; 30, destructible part; 40, battery module. DETAILED DESCRIPTION

[0024] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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.

[0026] 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 at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] 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 can communicate with each other; 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.

[0028] like Figures 1 to 4As shown, the utility model discloses a protective upper cover of a battery module, which is used for a battery module 40 composed of lithium batteries, wherein the battery module has a battery safety valve arranged upward, and the battery module 40 and the related battery safety valve are both prior art. The protective upper cover of the utility model includes an upper cover body 10 made of an insulating material, and the upper cover body 10 covers the upper part of the battery module 40. An upper cover explosion-proof port corresponding to the battery safety valve is provided on the upper cover body 10, and the upper cover explosion-proof port is provided with a safety cover 20 for closing the upper cover explosion-proof port. The safety cover 20 is connected to the upper cover body 10 through a destructible part 30, and after the ejection released by the battery safety valve destroys the destructible part 30, the upper cover explosion-proof port is opened to discharge the ejection to the outside of the upper cover body 10.

[0029] The spray includes components such as the electrolyte, lithium ions and combustible gas inside the battery, which are flammable and can cause a short circuit in the external circuit of the battery module. The protective upper cover of the utility model can isolate the spray outside the battery module by discharging the spray from the explosion-proof port of the upper cover, thereby minimizing damage to the battery module, reducing the probability of fire accidents and improving safety.

[0030] Depend on Figure 2 It can be seen that in this embodiment, the upper cover body 10 is a sheet structure, and its material can be PC, PP, PE, nylon and plastic. The upper cover body 10 is a sheet structure, which can reduce the space it occupies, reduce weight, and reduce manufacturing costs.

[0031] For example, Figure 1 As shown, the upper cover body 10 may include a plane portion and side baffles located on both sides of the plane portion, and the side baffles are located outside the lithium battery. By providing the baffles, the upper cover body can be simply fixed above the battery module 40 without the need for additional connectors, thereby improving assembly efficiency.

[0032] The number of the explosion-proof openings of the upper cover body 10 is equal to the number of the battery safety valves of the battery module, and the positions correspond one to one. Figure 1 As described above, 13 explosion-proof openings are arranged on the upper cover body 10 , and each explosion-proof opening is provided with a safety cover 20 for closing the explosion-proof opening.

[0033] like Figures 2 to 4 As shown, in this embodiment, the safety cover 20 is an integrated structure with the upper cover body 10. In this way, the safety cover 20 can be manufactured at the same time as the upper cover body 10 is produced.

[0034] In this embodiment, the destructible portion 30 is a short arm between the safety cover 20 and the upper cover body 10. The width of the short arm is less than one-fifth of the width of the safety cover 20, and a narrow slit is set between the upper cover body 10 and the other parts of the safety cover 20, which separates the safety cover 20 from the upper cover body 10. Therefore, the short arm is the only weak area between the safety cover 20 and the upper cover body 10 that remains connected, and it is easy to be damaged and deformed or even broken. When the destructible portion 30 is damaged, the safety cover 20 can no longer close the explosion-proof port of the upper cover, and the ejection in the battery is ejected from the explosion-proof port of the upper cover and most of it falls on the top surface of the upper cover body instead of falling on the top surface of the battery module, which has the effect of isolating the ejection from the battery module. The short arm can be set to have a certain elasticity, and can be reset after being impacted, so that the safety cover 20 closes the upper cover body 10 again, further improving safety.

[0035] In addition to being connected to the upper cover body 10 through a short arm, a notch may be provided between the safety cover 20 and the upper cover body 10. The notch can reduce the connection strength between the safety cover 20 and the upper cover body 10, and can be damaged after being impacted by the ejected material, thereby forming a pressure relief port and achieving the purpose of releasing the ejected material.

[0036] In some embodiments, a semi-transparent structure may be provided between the safety cover 20 and the upper cover body 10, that is, the thickness of the entire area or a part of the area of ​​the safety cover 20 is smaller than the thickness of the upper cover body 10. When the safety cover 20 is impacted by the ejected material, it may be damaged at random positions of these areas with smaller thickness, thereby releasing the ejected material.

[0037] In addition to being an integral structure with the upper cover body 10, the safety cover 20 can also be manufactured separately from the upper cover body 10 and then fixed together. The safety cover 20 may include a base and a cover body, the base is fixedly connected to the upper cover body 10, and the cover body and the base are connected by a connecting arm. Exemplarily, the base and the upper cover body 10 can be connected by bonding. The two can also be connected by welding, clamping, etc., which can reduce the scrap rate of the product and avoid the situation where the failure of the connection between a single safety cover 20 and the upper cover body 10 causes the entire upper cover body 10 to be scrapped.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 representation of the above terms does 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.

[0039] 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 protective upper cover for a battery module, used for a battery module composed of lithium batteries, wherein the battery module has an upwardly disposed battery safety valve, characterized in that: The protective upper cover comprises an upper cover body made of insulating material, the upper cover body covers the top of the battery module, an upper cover explosion-proof opening corresponding to the position of the battery safety valve is arranged on the upper cover body, the upper cover explosion-proof opening is provided with a safety cover for closing the upper cover explosion-proof opening, the safety cover is connected to the upper cover body through a destructible part, and after the ejection released by the battery safety valve destroys the destructible part, the upper cover explosion-proof opening is opened to discharge the ejection to the outside of the upper cover body.

2. The protective upper cover of the battery module according to claim 1, characterized in that: The upper cover body is a sheet-like structure.

3. The protective upper cover of the battery module according to claim 1, characterized in that: The safety cover and the upper cover body are an integrated structure.

4. The protective upper cover of the battery module according to claim 3, characterized in that: The destructible portion is a short arm between the safety cover and the upper cover body, and the width of the short arm is less than one fifth of the width of the safety cover.

5. The protective upper cover of the battery module according to claim 3, characterized in that: A notch is arranged between the safety cover and the upper cover body.

6. The protective upper cover of the battery module according to claim 3, characterized in that: A semi-transparent structure is formed between the safety cover and the upper cover body.

7. The protective upper cover of the battery module according to claim 1, characterized in that: The safety cover comprises a base and a cover body, the base is fixedly connected to the upper cover body, and the cover body and the base are connected via a connecting arm.

8. The protective upper cover of the battery module according to claim 7, characterized in that: The base is bonded to the upper cover body.

9. The protective upper cover of the battery module according to claim 1, characterized in that: The material of the upper cover body is PC, PP, PE, nylon and plastic.

10. The protective upper cover of the battery module according to claim 1, characterized in that: The upper cover body comprises a plane portion and side baffles located on both sides of the plane portion, and the side baffles are located on the outer side of the lithium battery.

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