Shell for battery device, battery device and electric equipment

Abstract

The utility model discloses a shell for battery device, battery device and electric equipment, the shell comprises: a first cover body, the first cover body comprises a base body and a heat absorbing member, the heat absorbing member is arranged on the base body and is used for absorbing heat, and the heat absorbing member is a phase change material member. According to the shell provided by the embodiment of the utility model, the heat absorption piece is arranged on the base body of the first cover body, and the heat absorption piece can cool and dissipate heat of the base body when thermal runaway and thermal spread of the battery in the battery device occur, so that the mechanical property of the base body can be well maintained, the probability of bulging deformation of the base body is reduced, and the shell is prevented from cracking and firing and the like; and the safety of the battery device can be improved.

Description

Technical Field

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

[0002] In the related art, the upper cover of the battery device is mainly used to protect the battery device, protect the battery from being corroded by the external environment, and provide a certain degree of buffering for external impact.

[0003] However, when the battery device produces gas due to thermal runaway, the gas will accumulate in the battery device and cause the air pressure inside the package to increase. The heat generated by the battery runaway will heat the upper cover, causing the mechanical properties of the upper cover to deteriorate, which can easily cause the upper cover to deform or break. Moreover, damage allows outside air to enter the battery device and mix with the gas ejected by the battery thermal runaway, causing fire and explosion, affecting the safety of the battery device. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a shell for a battery device, which can reduce the probability of deformation and damage and improve the safety of the battery device.

[0005] The utility model also provides a battery device.

[0006] The utility model also provides an electrical device.

[0007] According to the first aspect of the utility model, a shell for a battery device has a storage space for accommodating a battery, and includes: a first cover body, the first cover body includes a base and a heat absorber, the heat absorber is arranged on the base to absorb heat, wherein the heat absorber is a phase change material.

[0008] According to the housing for the battery device of the embodiment of the utility model, by arranging a heat-absorbing member on the base of the first cover body, when thermal runaway or heat spread of the battery in the battery device occurs, the heat-absorbing member can cool down and dissipate the heat of the base, thereby better maintaining the mechanical properties of the base, reducing the probability of swelling and deformation of the base, preventing rupture and fire, etc., and thus improving the safety of the battery device.

[0009] According to the housing for a battery device in an embodiment of the utility model, the phase change material is disposed in a preset accommodation space, and the preset accommodation space is used to limit the phase change material.

[0010] According to the shell for the battery device of the embodiment of the utility model, a first chamber and a first opening are defined in the base, the first opening is communicated with the first chamber, the heat absorption component is arranged in the first chamber, and the first opening is provided with a bursting structure, and the bursting structure is configured to release the internal pressure of the first chamber.

[0011] According to the housing for a battery device of an embodiment of the utility model, the heat absorption component is arranged on a side surface of the base body close to and / or away from the accommodating space and covers at least a portion of the surface of the base body.

[0012] According to the housing for a battery device of an embodiment of the utility model, a wrapping layer is provided on the outer side of the heat absorbing element, the wrapping layer is suitable for encapsulating the heat absorbing element and the wrapping layer is connected to the substrate.

[0013] According to the housing for a battery device in the embodiment of the utility model, the wrapping layer is bonded to the base.

[0014] According to the housing for a battery device of an embodiment of the utility model, the base has a bent portion formed by connecting two side plates, and the heat absorbing member corresponds to the bent portion and covers at least a portion of the two side plates.

[0015] According to the housing for a battery device in an embodiment of the utility model, a second chamber is defined in the base, and a fire extinguishing agent is arranged in the second chamber.

[0016] According to the housing for a battery device in an embodiment of the utility model, the outer surface of the substrate is provided with a flame retardant coating.

[0017] The housing for the battery device according to the embodiment of the utility model further includes: a heat-insulating protective layer, which is arranged on a side of the first cover body close to the accommodating space and covers at least a portion of the surface of the base body.

[0018] According to the shell for the battery device of the embodiment of the utility model, the heat insulating protective layer includes one of glass fiber cloth, fireproof foam, and mica sheet.

[0019] According to the housing for a battery device of an embodiment of the utility model, the first cover has a pressure relief portion, and the pressure relief portion is configured to release the pressure inside the housing.

[0020] According to the shell for the battery device of the embodiment of the utility model, the material of the heat absorption component includes at least one of hydrogel, paraffin, fatty acid, fatty alcohol, water, crystalline hydrate, and molten salt.

[0021] A battery device according to an embodiment of the second aspect of the utility model comprises a battery and a shell for a battery device according to an embodiment of the first aspect of the utility model, wherein the battery is at least partially accommodated in a accommodating space of the shell. By adopting the above-mentioned shell, when thermal runaway and heat spread of the battery occur in the battery device, the heat absorbing element can cool and dissipate the heat of the substrate, thereby better maintaining the mechanical properties of the substrate, reducing the probability of swelling and deformation of the substrate, preventing rupture and fire, etc., and thus improving the safety of the battery device.

[0022] The electrical equipment according to the embodiment of the third aspect of the utility model comprises the battery device according to the embodiment of the second aspect of the utility model. By adopting the battery device, the safety of the electrical equipment can be improved.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 is a schematic diagram of a first cover according to some embodiments of the utility model;

[0026] Figure 2 is a schematic diagram of a first cover according to other embodiments of the utility model;

[0027] Figure 3 is a schematic diagram of a first cover according to some other embodiments of the utility model;

[0028] Figure 4 is a schematic diagram of a first cover according to some further embodiments of the utility model;

[0029] Figure 5 is a schematic diagram of a first cover according to other embodiments of the utility model;

[0030] Figure 6 is a schematic diagram of a first cover according to some other embodiments of the utility model;

[0031] Figure 7 is a schematic diagram of a first cover according to some further embodiments of the utility model;

[0032] Figure 8 yes Figure 7 An exploded view of the first cover body shown;

[0033] Fig. 9 is a schematic diagram of a first cover according to other embodiments of the utility model;

[0034] Fig.10 is a schematic diagram of a battery device according to some embodiments of the present utility model;

[0035] Fig.11 It is a schematic diagram of an electrical device according to some embodiments of the utility model.

[0036] Reference numerals:

[0037] Battery device 1000, power-consuming equipment 2000,

[0038] Housing 100, containing space 101, battery 200,

[0039] The first cover 10, the base 11, the first chamber 111, the second chamber 112, the bending portion 113, the side plate 114, the flame retardant coating 115, the heat absorbing member 12, the wrapping layer 121, the blasting structure 13, the heat insulation protective layer 14, the pressure relief portion 15, the fire extinguishing agent 16,

[0040] The second cover 20 . DETAILED DESCRIPTION

[0041] 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.

[0042] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "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 communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Reference below Figure 1-Figure 9 A housing 100 according to an embodiment of the present invention is described.

[0045] like Figure 1-Figure 9 As shown, according to one embodiment of the utility model, the housing 100 includes: a first cover body 10, the housing 100 has a accommodating space 101 for accommodating a battery 200, the first cover body 10 includes a base 11 and a heat absorbing member 12, the heat absorbing member 12 is arranged on the base 11, the heat absorbing member 12 can be arranged outside the base 11, the heat absorbing member 12 can also be arranged inside the base 11, for example, a first chamber 111 is formed inside the base 11, the heat absorbing member 12 is arranged in the first chamber 111, and the heat absorbing member 12 can also be arranged inside and outside the base 11.

[0046] The housing 100 is usually formed of two parts, a first cover body 10 and a second cover body 20 . The base body 11 can be connected with the second cover body 20 to form a receiving space 101 . The second cover body 20 can be a tray or a tray with a frame.

[0047] The heat absorbing element 12 is used to absorb heat. The heat absorbing element 12 is a phase change material. The phase change material will undergo a phase change within a specific temperature range, that is, from solid to liquid or from liquid to solid. In this process, the material will absorb or release a large amount of latent heat, while its own temperature change is relatively small.

[0048] The heat absorbing element 12 is made of phase change material, so that the heat absorbing element 12 can absorb heat during the phase change process, thereby absorbing the heat in the base 11 or the accommodating space 101, and then effectively cooling the base 11. Moreover, the phase change material can change in cycles for many times, so that it can be used throughout the entire service life of the battery device 1000, reducing the probability of deformation and damage of the first cover body 10 during the entire cycle, improving the mechanical properties of the first cover body 10, and improving the safety of the battery device 1000.

[0049] In addition, by setting the arrangement position of the heat absorbing member 12 , the temperature of a specific position of the substrate 11 can be reduced, which is beneficial to achieve directional blasting and improve the safety of equipment using the battery device 1000 .

[0050] It should be noted that the material of the matrix 11 can be a metal material (steel, aluminum alloy), or a polypropylene material or a composite material, such as a polypropylene composite material (polypropylene composite material with added glass fiber, polypropylene composite material with added flame retardant), epoxy resin and glass fiber composite material, sheet molding compound composite material, carbon fiber reinforced composite material, long fiber reinforced thermoplastic material, etc.

[0051] According to the housing 100 of the embodiment of the utility model, by arranging the heat absorption member 12 on the base 11 of the first cover body 10, when the battery 200 in the battery device 1000 suffers from thermal runaway and heat spread, the heat absorption member 12 can cool down and dissipate the heat of the base 11, thereby better maintaining the mechanical properties of the base 11, reducing the probability of swelling and deformation of the base 11, preventing rupture and fire, etc., and thus improving the safety of the battery device 1000.

[0052] In some embodiments, the material of the heat absorber 12 is hydrogel, and the heat absorber 12 may also be paraffin, or fatty acid, or fatty alcohol, or water, or crystalline hydrate, or molten salt, etc.

[0053] like Figure 1 As shown, in some embodiments, a first chamber 111 and a first opening are defined in the substrate 11, and the first opening is communicated with the first chamber 111. The first opening here may be one or more, and the heat absorbing member 12 is disposed in the first chamber 111. The first opening is provided with a bursting structure 13, and the bursting structure 13 can release the internal pressure of the first chamber 111. Since the heat absorbing member 12 is located in the first chamber 111 of the substrate 11, when the battery device 1000 is not out of control, the bursting structure 13 remains sealed. When the battery 200 in the battery device 1000 is in thermal runaway, the heat absorbing member 12 absorbs heat and undergoes a phase change, which causes the material to produce gas. As the heat absorbing member 12 produces gas, the air pressure in the first chamber 111 gradually increases. When the predetermined pressure of the bursting structure 13 is reached, the bursting structure 13 explodes, thereby exhausting the gas and dissipating the heat to the external environment, thereby improving the safety of the battery device 1000.

[0054] The heat absorbing element 12 can be injected into the first chamber 111 through the first opening in a specific environment in the form of liquid, and then the bursting structure 13 is installed at the first opening, so that the heat absorbing element 12 is sealed in the base 11, and then the heat absorbing element 12 can be formed into a solid state in the first chamber 111 through changes in the environment; of course, the heat absorbing element 12 can also be injected into the first chamber 111 through other openings connected to the first chamber 111, and then the opening can be sealed.

[0055] like Figure 2 and Figure 3 As shown, in some embodiments, the heat absorbing member 12 is disposed on a side surface of the base 11 away from the accommodation space 101 (eg Figure 2 The upper surface shown), wherein Figure 2 As shown, the heat absorbing member 12 may also cover the entire surface of the side of the substrate 11, such as Figure 3 As shown, the heat absorbing member 12 can cover a part of the surface of the substrate 11, so that the heat absorbing member 12 can cool the substrate 11, and at the same time, it can also play a certain sealing and protective role after the substrate 11 has a hot melt leakage; and after the heat absorbing member 12 is heated and produces gas, the gas can also be directly discharged into the external environment, thereby improving safety.

[0056] like Figure 4 and Figure 5 As shown, in some embodiments, the heat absorbing member 12 is disposed on a side surface of the base 11 close to the accommodation space 101 (eg Figure 4 The lower surface shown), wherein Figure 4 As shown, the heat absorbing member 12 may also cover the entire surface of the side of the substrate 11, such as Figure 5 As shown, the heat absorbing member 12 can cover a portion of the surface of the substrate 11, so that the heat absorbing member 12 is closer to the battery 200 relative to the substrate 11. The heat absorbing member 12 can isolate the runaway gas and prevent the hot gas from directly impacting and heating the substrate 11, thereby improving the heat absorption effect.

[0057] like Figure 6 As shown, a heat absorbing member 12 is provided on one side surface of the substrate 11 close to the accommodating space 101, and a heat absorbing member 12 is also provided on the side surface of the substrate away from the accommodating space 101. By respectively arranging the heat absorbing members 12 on both side surfaces of the substrate 11, the heat absorbing members 12 can isolate the runaway gas and prevent the hot gas from directly impacting and heating the substrate 11; the heat absorbing member 12 can also cool the substrate 11, and at the same time, it can also play a certain sealing and protective role after the substrate 11 has hot melt leakage; in addition, after the heat absorbing member 12 is heated and produces gas, the gas can also be directly discharged into the external environment to improve safety.

[0058] like Figure 2-Figure 6 As shown, in some embodiments, a wrapping layer 121 is provided on the outer side of the heat absorbing element 12, and the wrapping layer 121 can encapsulate the heat absorbing element 12, and the wrapping layer 121 is connected to the substrate 11. That is, when the heat absorbing element 12 is located on the outer surface of the substrate 11, the wrapping layer 121 is encapsulated on the outer side of the heat absorbing element 12, so that the wrapping layer 121 wraps the heat absorbing element 12, and at the same time, the wrapping layer 121 is connected to the substrate 11 to fix the heat absorbing element 12 on the outer side of the substrate 11, thereby achieving a protective effect on the heat absorbing element 12, preventing the heat absorbing element 12 from being in contact with the external environment and causing performance degradation, thereby extending its service life.

[0059] The wrapping layer 121 may be made of a material with high thermal conductivity, such as metal or high thermal conductivity plastic, to improve the efficiency of heat transfer from the substrate 11 to the heat absorbing element 12. In some optional examples, the wrapping layer 121 is an aluminum-plastic film.

[0060] In some embodiments, the wrapping layer 121 is bonded to the base 11 , that is, after the wrapping layer 121 wraps the heat absorbing element 12 , it is bonded to the base 11 as a whole to form the entire first cover 10 , which is convenient to fix and reliable to connect.

[0061] like Figure 7 and Figure 8 As shown, in some embodiments, the base 11 has a bending portion 113, and the bending portion 113 is formed by connecting two adjacent side plates 114. The base 11 has multiple bending portions 113, wherein at least part of the bending portions 113 is provided with a heat absorbing member 12, and the heat absorbing member 12 corresponds to the position of the bending portion 113. The heat absorbing member 12 covers at least a portion of the two side plates 114. Since the strength at the bending portion 113 is relatively low and it is easy to break, the heat absorbing member 12 covers the bending portion 113, thereby reducing the probability of deformation and rupture of the bending portion 113, improving the stability of the first cover body 10, and further improving the safety of the battery device 1000.

[0062] like Fig. 9 As shown, in some embodiments, a second chamber 112 is defined in the substrate 11, and a fire extinguishing agent 16 is provided in the second chamber 112. For substrates 11 made of some heat-melting materials, when the battery 200 in the battery device 1000 thermally runs away, the substrate 11 melts and the fire extinguishing agent 16 can flow out to cool down and extinguish the fire, thereby further improving safety.

[0063] There is no special restriction on the type of the fire extinguishing agent 16. Those skilled in the art can select existing gaseous, liquid, and solid fire extinguishing agents 16 according to actual use requirements. For example, the fire extinguishing agent 16 can be hexafluoropropane, heptafluoropropane, or perfluorohexanone.

[0064] like Figure 5 and Fig. 9 As shown, in some embodiments, the outer surface of the substrate 11 is provided with a flame retardant coating 115, such as epoxy resin coating. By providing the flame retardant coating 115, the flame retardant coating 115 provides additional protection for the substrate 11, which can slow down the spread of fire and improve safety.

[0065] like Figure 8 As shown, in some embodiments, the housing 100 further includes: a heat insulating protective layer 14, which is disposed on a side of the first cover 10 close to the accommodation space 101, and the heat insulating protective layer 14 can cover at least a portion of the surface of the base 11. When a heat absorbing member 12 is disposed on the surface of the base 11, the heat insulating protective layer 14 is located on a side of the heat absorbing member 12 close to the accommodation space 101.

[0066] The heat-insulating protective layer 14 can be glass fiber cloth, or fireproof foam, or mica sheet.

[0067] By providing a heat-insulating protective layer 14, the first cover body 10 can be protected, effectively preventing the high-temperature substances generated when the battery 200 thermally runs away from impacting the first cover body 10, and reducing the probability of the first cover body 10 being damaged; the heat-insulating protective layer 14 can also play a heat-insulating role, preventing the mechanical properties of the first cover body 10 from being reduced due to the increase in temperature.

[0068] The heat-insulating protective layer 14 may be bonded to the first cover body 10 .

[0069] like Figure 8 As shown, in some embodiments, the first cover body 10 has a pressure relief portion 15, which can release the pressure inside the outer shell 100, that is, when the battery 200 thermally runs away, the air pressure in the accommodating space 101 gradually increases. When the predetermined pressure of the pressure relief portion 15 is reached, the pressure relief portion 15 opens, so that a large amount of gas inside the accommodating space 101 can be discharged, thereby improving the safety of the battery device 1000.

[0070] The pressure relief part 15 may be a spring-type explosion-proof valve, a film bursting explosion-proof valve, or the like.

[0071] like Fig.10 As shown, the battery device 1000 according to the embodiment of the utility model includes a battery 200 and a shell 100 according to the embodiment of the present application. At least a part of the battery 200 is accommodated in the accommodating space 101 of the shell 100. By adopting the above-mentioned shell 100, when thermal runaway and heat spread of the battery 200 in the battery device 1000 occur, the heat absorbing member 12 can cool and dissipate the heat of the substrate 11, so as to better maintain the mechanical properties of the substrate 11, reduce the probability of swelling and deformation of the substrate 11, prevent rupture and fire, etc., and thus improve the safety of the battery device 1000.

[0072] The battery device 1000 here may be a battery pack or a battery assembly.

[0073] like Fig.11 As shown, the electric device 2000 according to the embodiment of the present invention includes the battery device 1000 according to the embodiment of the present application. By adopting the above-mentioned battery device 1000, the safety of the electric device 2000 can be improved.

[0074] Other structures and operations of the battery device 1000 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here. The up-down direction, left-right direction and front-back direction are based on the up-down direction, left-right direction and front-back direction shown in the figure.

[0075] In the description of the present utility model, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature "above", "above" and "above" a second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0076] 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0077] 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 housing for a battery device, the housing having a storage space for accommodating a battery, characterized in that: include: The first cover, The first cover body includes a base and a heat absorbing member, wherein the heat absorbing member is arranged on the base and is used to absorb heat, wherein the heat absorbing member is a phase change material member.

2. The housing for a battery device according to claim 1, characterized in that: The phase change material is arranged in a preset accommodation space, and the preset accommodation space is used to limit the phase change material.

3. The housing for a battery device according to claim 1, characterized in that: A first chamber and a first opening are defined in the base, the first opening is communicated with the first chamber, the heat absorbing component is arranged in the first chamber, and the first opening is provided with a bursting structure, and the bursting structure is configured to release the internal pressure of the first chamber.

4. The housing for a battery device according to claim 1, characterized in that: The heat absorbing element is arranged on a side surface of the base body close to and / or away from the accommodating space and covers at least a part of the surface of the base body.

5. The housing for a battery device according to claim 4, characterized in that: A wrapping layer is disposed on the outer side of the heat absorbing element, wherein the wrapping layer is suitable for encapsulating the heat absorbing element and the wrapping layer is connected to the substrate.

6. The housing for a battery device according to claim 5, characterized in that: The wrapping layer is bonded to the base.

7. The housing for a battery device according to any one of claims 1 to 6, characterized in that: The base has a bending portion formed by connecting two side plates, and the heat absorbing component corresponds to the bending portion and covers at least a portion of the two side plates.

8. The housing for a battery device according to claim 1, characterized in that: A second chamber is defined in the base, and a fire extinguishing agent is arranged in the second chamber.

9. The housing for a battery device according to claim 1, characterized in that: The outer surface of the substrate is provided with a flame retardant coating.

10. The housing for a battery device according to claim 1, characterized in that: Also includes: Thermal insulation A protective layer, wherein the heat-insulating protective layer is disposed on a side of the first cover body close to the accommodating space and covers at least a portion of the surface of the base body.

11. The housing for a battery device according to claim 10, characterized in that: The heat-insulating protective layer comprises one of glass fiber cloth, fireproof foam and mica sheet.

12. The housing for a battery device according to claim 1, characterized in that: The first cover has a pressure relief portion configured to release pressure in the housing.

13. The housing for a battery device according to claim 1, characterized in that: The material of the heat absorbing element includes at least one of hydrogel, paraffin, fatty acid, fatty alcohol, water, crystalline hydrate, and molten salt.

14. A battery device, characterized in that: The invention comprises a battery and a housing for a battery device according to any one of claims 1 to 13, wherein the battery is at least partially accommodated in an accommodating space of the housing.

15. An electrical equipment, characterized in that: Comprising a battery device according to claim 13.

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