Insulation assembly, battery pack and electric device

Abstract

The utility model provides an insulating component, a battery pack and an electric device, the insulating component is used for the battery pack and comprises an insulating film and insulating oil; the insulating film is provided with a cavity, the cavity is filled with the insulating oil, and the insulating assembly is suitable for being arranged between a battery in the battery pack and a battery pack fixing structure or between adjacent batteries in the battery pack. Wherein the insulating film has relatively high resistivity and breakdown field strength, so that current can be prevented from passing through, and a circuit and electrical elements are protected from electric shock and overload. The insulating liquid also has excellent insulating property and pressure resistance, and meanwhile, the insulating liquid can seal internal gaps after the battery pack has an electrical fault, so that electrolyte or combustible gas is prevented from flowing inwards. Therefore, the insulating component formed by the insulating film and the insulating liquid has good electrical insulating property, so that the arc breakdown resistance of the battery pack can be improved, the arcing and firing phenomena generated when the battery pack encounters an electrical fault are avoided, and the electricity utilization safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and specifically relates to an insulating component, a battery pack and an electric device. Background Art

[0002] Due to its advantages of being green, environmentally friendly and having low operating costs, electric vehicle technology has been highly developed and its market share has increased rapidly. As the core power component of electric vehicles, the power safety of battery packs is of vital importance.

[0003] In the related art, thermal conductive adhesive is applied between the battery module and the liquid cooling system above, structural adhesive is applied between the battery module and the tray below, and aerogel is used to separate the battery modules or batteries.

[0004] In the related art, when a battery pack encounters an electrical fault, due to excessive instantaneous current or short circuit, it is easy to cause arcing and fire inside the battery pack, posing a serious threat to the safety of battery pack electricity use. Utility Model Content

[0005] The purpose of the embodiments of the utility model is to provide an insulating component, a battery pack and an electrical device, which can solve the problem that the battery pack is prone to arcing and fire when encountering an electrical fault.

[0006] In order to solve the above technical problems, the utility model is achieved as follows:

[0007] In a first aspect, an embodiment of the utility model provides an insulation assembly for a battery pack, comprising an insulation film and an insulation liquid;

[0008] The insulating film has a cavity, the insulating liquid is filled in the cavity, and the insulating component is suitable for being arranged between the battery in the battery pack and the battery pack fixing structure, or being arranged between adjacent batteries in the battery pack.

[0009] Optionally, the insulating film is a polyimide film, a polyethylene terephthalate film or a polypropylene film.

[0010] Optionally, the insulating liquid is insulating oil or liquid silicone.

[0011] Optionally, a backing layer is provided on at least one surface of the insulating film facing away from the cavity, and the backing layer is suitable for bonding the insulating component between the battery in the battery pack and the battery pack fixing structure, or bonding the insulating component between adjacent batteries in the battery pack.

[0012] In a second aspect, an embodiment of the present utility model further provides a battery pack, comprising a plurality of batteries, a liquid cooling assembly, a tray, and any of the above-mentioned insulating assemblies;

[0013] The liquid cooling assembly is provided on a side of the battery close to the tray and / or a side of the battery away from the tray;

[0014] A first insulating component is provided between the battery and the liquid cooling component, and / or a second insulating component is provided between the battery and the tray.

[0015] Optionally, each of the batteries is located between the liquid cooling assembly and the tray, and a third insulating assembly is provided between at least two adjacent batteries.

[0016] Optionally, one end of the third insulating component is sealed and connected to the first insulating component, and the other end of the third insulating component is sealed and connected to the second insulating component.

[0017] Optionally, the battery pack further comprises thermally conductive adhesive;

[0018] A first thermally conductive adhesive is bonded between the battery and the first insulating component, and / or a second thermally conductive adhesive is bonded between the first insulating component and the liquid cooling component.

[0019] Optionally, the battery pack further comprises structural adhesive;

[0020] A first structural adhesive is bonded between the battery and the second insulating component, and / or a second structural adhesive is bonded between the second insulating component and the tray.

[0021] Optionally, the battery pack further comprises heat-insulating glue;

[0022] The heat-insulating adhesive is at least bonded between the battery and the third insulating component.

[0023] Optionally, the battery pack further comprises a frame;

[0024] The frame is connected between the liquid cooling assembly and the tray, and the frame and the tray are arranged to form a battery accommodating space.

[0025] Optionally, the battery pack further includes an upper cover;

[0026] The upper cover is arranged on a side of the liquid cooling assembly away from the battery, and the upper cover is connected to the frame.

[0027] Optionally, the thermal insulation adhesive is bonded between the frame and the battery.

[0028] Optionally, the thermal insulation adhesive is aerogel.

[0029] Optionally, the battery pack further comprises a buffer;

[0030] The buffer component is arranged between the second structural adhesive and the tray, and the second structural adhesive (6b) and the buffer component cover the tray.

[0031] In a third aspect, an embodiment of the utility model further provides an electrical device, comprising a battery pack insulation assembly as described in any one of the above items.

[0032] The insulating component provided by the embodiment of the utility model includes an insulating film and an insulating liquid filled in the cavity of the insulating film. That is, the insulating liquid is filled inside the bag-shaped insulating film, wherein the insulating film has a high resistivity and breakdown field strength, which can prevent the current from passing through, and protect the circuit and electrical components from electric shock and overload; the insulating liquid also has excellent insulation performance and pressure resistance performance, and at the same time, the insulating liquid can seal the internal gaps after an electrical fault occurs in the battery pack, preventing the electrolyte or combustible gas from leaking in. Therefore, the insulating component formed by the insulating film and the insulating liquid has good electrical insulation, and is used in the battery pack, and can be arranged between the battery in the battery pack and the fixed structure of the battery pack, or, arranged between different single cells to form a battery pack. That is, the arc breakdown resistance of the battery pack is improved, the arcing and fire phenomenon caused by the battery pack encountering an electrical fault is avoided, and the power safety of the battery pack is improved.

[0033] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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:

[0035] Figure 1 It is a side view of the battery pack structure provided by an embodiment of the utility model;

[0036] Figure 2 It is a top view of the battery pack structure provided in an embodiment of the present utility model.

[0037] Description of reference numerals:

[0038] 1-insulating component, 11-insulating film, 12-insulating liquid, 1a-first insulating component, 1b-second insulating component, 1c-third insulating component, 2-battery, 3-liquid cooling component, 4-tray, 5-thermal conductive adhesive, 5a-first thermal conductive adhesive, 5b-second thermal conductive adhesive, 6-structural adhesive, 6a-first structural adhesive, 6b-second structural adhesive, 7-thermal insulating adhesive, 8-frame, 9-buffer. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0041] The insulation assembly, battery pack and electrical device provided by the embodiments of the present utility model are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0042] The utility model embodiment provides an insulating component 1 for a battery pack, referring to Figure 1 and Figure 2 , including an insulating film 11 and an insulating liquid 12; the insulating film 11 has a cavity, the insulating liquid 12 is filled in the cavity, and the insulating component 1 is suitable for being arranged between the battery in the battery pack and the battery pack fixing structure, or, being arranged between adjacent batteries in the battery pack.

[0043] Specifically, if Figure 1 and Figure 2As shown, the insulating component 1 provided by the embodiment of the utility model includes an insulating film 11 and an insulating liquid 12. The insulating film 11 is a double-layer film structure or a bag-shaped structure, and a cavity is formed inside the insulating film. The cavity is filled with an insulating liquid 12. The insulating film 11 has a high resistivity and breakdown field strength, which can prevent current from passing through and protect the circuit and electrical components from electric shock and overload. The insulating liquid also has excellent insulation and pressure resistance, has an arc extinguishing effect, and has an insulating sealing effect. It can seal the internal gap after an electrical fault occurs in the battery pack to prevent the electrolyte or combustible gas from flowing in. Therefore, the insulating component 1 composed of the insulating film 11 and the insulating liquid 12 has good electrical insulation and good thermal stability, can effectively absorb heat, and avoid excessive heating of the battery 2. The insulating component 1 is used in a battery pack. Specifically, the insulating component 1 can be arranged between the battery 2 in the battery pack and the fixed structure of the battery pack, or the insulating component 1 can be arranged between different single cells 2 to form a battery pack, which can improve the arc breakdown resistance of the battery pack. The fixed structure of the battery pack includes but is not limited to the liquid cooling component 3, the tray 4, the frame 8 or the upper cover. Among them, along the Z direction, the liquid cooling component 3 is arranged at the upper end or lower end of the battery 2, the tray 4 is arranged at the lower end of the battery 2, the frame 8 is located at the side of the battery, and the upper cover is located at the upper end of the battery 2. That is, the insulating component 1 can be arranged between the battery 2 and the liquid cooling component 3, between the battery 2 and the tray 4, between the battery 2 and the frame 8, or between different batteries 2. When the liquid cooling component 3 is located at the lower end of the battery 2, the insulating component 1 is arranged between the upper cover and the battery 2, and / or between the liquid cooling component 3 and the battery 2; when the liquid cooling component 3 is located at the upper end of the battery 2, the insulating component 1 is arranged between the liquid cooling component 3 and the battery 2, and / or between the tray 4 and the battery 2. The connection method between the insulating component 1 and the battery 2, and / or between the insulating component 1 and the fixed structure of the battery pack includes but is not limited to bonding or mechanical connection.

[0044] When the battery pack encounters a working condition failure during actual use, it is easy to cause an instantaneous excessive current or short circuit between the battery 2 and the tray 4, between the battery 2 and the battery 2, that is, in the battery pack, or between the battery 2 and the liquid cooling component 3, which is easy to cause arcing and fire in the battery pack. The insulating component 1 provided in this embodiment is used in the battery pack to form an insulating protection effect, which can improve the battery pack's ability to resist arc breakdown, avoid arcing and fire caused by electrical failures in the battery pack, and improve the safety of the battery pack.

[0045] Optionally, the insulating film 11 is a polyimide film, a polyethylene terephthalate film or a polypropylene film.

[0046] Specifically, the insulating film 11 includes an inorganic insulating film and an organic insulating film. Among them, the inorganic insulating film includes but is not limited to a silicon oxide film, a silicon nitride film, an aluminum oxide film or an aluminum nitride film. The organic insulating film includes but is not limited to a PI (Polyimide) film, a PET (Polyethylene terephthalate) film, or a PP (Polypropylene) film, a polyurethane film, a methyl methacrylate film, a polyphenylene ether film or a polyether nitrile film. Exemplarily, this embodiment uses a PI film, a PET film or a PP film, which has excellent electrical insulation, high and low temperature resistance, adhesion and sealing, and has an arc extinguishing effect.

[0047] Optionally, the insulating liquid 12 is insulating oil or liquid silicone resin.

[0048] Specifically, the insulating liquid 12 can be insulating oil or liquid silicone. The insulating oil plays the role of insulation, cooling, impregnation and filling, including but not limited to silicone oil, petroleum, phenolic resin oil, silicone oil, fluorinated hydrocarbon oil. For example, this embodiment uses a relatively high viscosity silicone oil, which has good chemical stability and electrical insulation, and has an insulating and sealing effect to prevent the electrolyte or combustible gas from leaking into the battery pack after an electrical fault occurs.

[0049] Optionally, a backing layer is provided on at least one side surface of the insulating film 11 facing away from the cavity, and the backing layer is suitable for bonding the insulating component 1 between the battery 2 in the battery pack and the battery pack fixing structure, or bonding the insulating component 1 between adjacent batteries 2 in the battery pack.

[0050] Specifically, by providing a back glue layer on the outer surface of the insulating film, the bonding force between the insulating component 1 and the battery 2, and between the insulating component 1 and the battery pack fixing structure is strengthened. The back glue material includes but is not limited to water-based glue, hot melt glue, and UV (Ultraviolet Rays, ultraviolet light curing) glue.

[0051] The present utility model embodiment also provides a battery pack, referring to Figure 1 and Figure 2 , comprising a plurality of batteries 2, a liquid cooling assembly 3, a tray 4 and any one of the above-mentioned insulating assemblies 1; the liquid cooling assembly 3 is arranged on a side of the battery 2 close to the tray 4 and / or on a side away from the tray 4; a first insulating assembly 1a is arranged between the battery 2 and the liquid cooling assembly 3, and / or a second insulating assembly 1b is arranged between the battery 2 and the tray 4.

[0052] Specifically, if Figure 1 and Figure 2As shown, the battery pack includes a plurality of batteries 2, a liquid cooling assembly 3, a tray 4 and an insulating assembly 1. Along the Z direction, the upper or lower end of the battery 2 is provided with a liquid cooling assembly 3, and the lower end of the battery 2 is provided with a tray 4 for fixed support. When the liquid cooling assembly 3 is provided at the lower end of the battery 2, the insulating assembly 1 can be provided between the battery 2 and the liquid cooling assembly 3; when the liquid cooling assembly 3 is provided at the upper end of the battery 2, the insulating assembly 1 at the upper end can be provided between the battery 2 and the liquid cooling assembly 3, and the insulating assembly 1 at the lower end can be provided between the battery 2 and the tray 4. The insulating assembly 1 provided between the battery 2 and the liquid cooling assembly 3 is a first insulating assembly 1a, that is, the first insulating assembly 1a is coated on the lower side of the liquid cooling assembly 3, so as to improve the insulation between the liquid cooling assembly 3 and the battery 2, and prevent the battery from arcing and catching fire due to electrical failure and burning the liquid cooling plate. At the same time, the insulating liquid 12 in the insulating assembly 1 can prevent the electrolyte from leaking to the liquid cooling assembly 3, thereby reducing the arcing risk of the liquid cooling assembly 3. The insulating component 1 disposed between the battery 2 and the tray 4 is a second insulating component 1b, that is, the second insulating component 1b is coated on the upper side of the tray 4 to improve the insulation between the tray 4 and the battery 2. At the same time, when a bump occurs at the bottom of the battery pack, the insulating liquid 12 in the insulating component 1 can prevent the electrolyte from leaking to the tray 4, thereby reducing the risk of arcing of the tray 4. In some embodiments, when the liquid cooling component 3 is disposed below the battery 2, only the first insulating component 1a can be disposed between the battery 2 and the liquid cooling component 3; only the second insulating component 1b can be disposed between the battery 2 and the tray 4; or the first insulating component 1a and the second insulating component 1b can be disposed at the same time. When the first insulating component 1a and the second insulating component 1b are disposed at the same time, the overall insulation protection performance of the battery pack can be effectively improved to enhance the arc breakdown resistance of the battery pack and ensure the electrical safety of the battery pack.

[0053] Optionally, refer to Figure 1 and Figure 2 Each of the batteries 2 is located between the liquid cooling assembly 3 and the tray 4 , and a third insulating assembly 1 c is provided between at least two of the batteries 2 .

[0054] Specifically, if Figure 1 and Figure 2 As shown, a plurality of single cells 2 are distributed along the X direction to form a battery module, and are all located between the liquid cooling assembly 3 and the tray 4. An insulating assembly 1, namely a third insulating assembly 1c, may also be provided between two adjacent batteries 2. When there are three batteries 2, two third insulating assemblies 1c are provided accordingly; when there are four batteries 2, three third insulating assemblies 1c are provided accordingly. It is possible to avoid arcing and fire due to excessive pressure difference between the batteries 2, or burning of other batteries 2 when any battery 2 arcs and catches fire, and to isolate heat transfer between the batteries 2. At the same time, the insulating liquid 12 in the insulating assembly 1 can prevent leakage of the electrolyte, and to avoid diffusion of the electrolyte between the battery packs when the battery pack fails, thereby affecting the power safety of the battery pack.

[0055] Optionally, refer to Figure 1 and Figure 2 One end of the third insulating component 1c is sealed and connected to the first insulating component 1a, and the other end of the third insulating component 1c is sealed and connected to the second insulating component 1b.

[0056] Specifically, if Figure 1 and Figure 2 As shown, along the Z direction, the upper end of the third insulating component 1c is sealed and connected to the first insulating component 1a, and the lower end of the third insulating component 1c is sealed and connected to the second insulating component 1b. The sealing is achieved by the bonding between the insulating films 11, filling any gaps that may exist, and forming a complete multiple insulation protection structure to enhance the arc breakdown resistance of the battery pack.

[0057] Optionally, refer to Figure 1 and Figure 2 The battery pack also includes a thermally conductive adhesive 5; a first thermally conductive adhesive 5a is bonded between the battery 2 and the first insulating component 1a, and / or a second thermally conductive adhesive 5b is bonded between the first insulating component 1a and the liquid cooling component 3.

[0058] Specifically, if Figure 1 and Figure 2 As shown, in some embodiments, the thermal conductive glue 5, i.e., the first thermal conductive glue 5a, may be bonded only between the battery 2 and the first insulating component 1a, or, the thermal conductive glue 5, i.e., the second thermal conductive glue 5b, may be bonded only between the first insulating component 1a and the liquid cooling component 3, or, a double-layer thermal conductive glue 5 is provided, and the first thermal conductive glue 5a is applied to the upper end of the battery in sequence, the first insulating component 1a is bonded to the upper surface of the first thermal conductive glue 5a, the second thermal conductive glue 5b is applied to the upper surface of the first insulating component 1a, and the liquid cooling component 3 is bonded to the upper surface of the second thermal conductive glue 5b. This embodiment adopts the form of a double-layer thermal conductive glue 5 to improve the thermal conductivity between the battery 2 and the liquid cooling component 3 and effectively control the operating temperature of the battery pack. The thermal conductive glue 5 includes, but is not limited to, silicone, acrylate or polysiloxane.

[0059] Optionally, refer to Figure 1 and Figure 2 The battery pack also includes a structural adhesive 6; a first structural adhesive 6a is bonded between the battery 2 and the second insulating component 1b, and / or a second structural adhesive 6b is bonded between the second insulating component 1b and the tray 4.

[0060] Specifically, if Figure 1 and Figure 2As shown, in some embodiments, the structural adhesive 6, i.e., the first structural adhesive 6a, may be bonded only between the battery 2 and the second insulating component 1b, or, the structural adhesive 6, i.e., the second structural adhesive 6b, may be bonded only between the second insulating component 1b and the tray 4, or, a double-layer structural adhesive 6b may be provided, and the second structural adhesive 6b may be applied to the upper end of the tray 4 in sequence, the upper surface of the second structural adhesive 6b may be bonded to the second insulating component 1b, the upper surface of the second insulating component 1b may be coated with the first structural adhesive 6a, and the upper surface of the first structural adhesive 6a may be bonded to the battery 2. This embodiment adopts a double-layer structural adhesive 6 to enhance the bonding force between the battery 2 and the tray 4, and to prevent the battery 2 from shaking and being damaged when the battery pack is hit. The structural adhesive 6 can withstand a large load, and is resistant to aging, fatigue, corrosion, and has good insulation performance, and has strong sealing performance, so as to effectively fix the battery 2 in the battery pack.

[0061] Optionally, refer to Figure 1 and Figure 2 The battery pack also includes a heat-insulating adhesive 7; the heat-insulating adhesive 7 is at least bonded between the battery 2 and the third insulating component 1c.

[0062] Optionally, the thermal insulation adhesive 7 is aerogel.

[0063] Specifically, if Figure 1 and Figure 2 As shown, the heat-insulating adhesive 7 has the function of heat insulation and heat preservation, and has good adhesion. The heat-insulating adhesive 7 is arranged between different batteries 2, which can effectively reduce the heat transfer between the batteries 2, ensure the stable working temperature of the batteries 2, and effectively fix the different batteries 2 together. The heat-insulating adhesive 7 can be bonded between at least one side of the third insulating component 1c and the battery 2. In this embodiment, a double layer of heat-insulating adhesive 7 is arranged between any two adjacent batteries 2, that is, the heat-insulating adhesive 7 is applied between each side of the third insulating component 1c and the battery 2, and different batteries 2 are bonded together while heat-insulating. The heat-insulating adhesive 7 of this embodiment is aerogel, usually silicon aerogel, which is a nano-scale porous solid material. Due to its high porosity and low density, it has strong heat-insulating properties and good compression properties. While heat-insulating, it can also be used as a buffer material to adapt to the expansion and contraction changes of the battery during the charging and discharging process.

[0064] Optionally, refer to Figure 1 and Figure 2 The battery pack also includes a frame 8; the frame 8 is connected between the liquid cooling assembly 3 and the tray 4, and the frame 8 and the tray 4 are arranged to form a battery accommodating space.

[0065] Specifically, if Figure 1 and Figure 2As shown, the frame 8 is fixed between the liquid cooling assembly 3 and the tray 4 as a constraint bearing structure of the battery pack, also known as an expansion beam. The frame 8 is located outside the battery pack, and the frame 8 and the tray 4 are surrounded to form a battery accommodating space, and the battery 2 is installed in the battery accommodating space.

[0066] Optionally, the battery pack further includes an upper cover; the upper cover is arranged on a side of the liquid cooling assembly 3 away from the battery 2 , and the upper cover is connected to the frame 8 .

[0067] Specifically, when the liquid cooling assembly 3 is located at the upper end of the battery 2, an upper cover is provided on the side of the liquid cooling assembly 3 that is away from the battery 2, i.e., above the liquid cooling assembly 3. The upper part of the frame 8 is connected to the upper cover, and the lower part of the frame 8 is connected to the tray 4. The upper cover is used to protect the battery 2 and the upper part of the liquid cooling assembly 3.

[0068] Optionally, refer to Figure 1 and Figure 2 The thermal insulation adhesive 7 is bonded between the frame 8 and the battery 2 .

[0069] Specifically, if Figure 1 and Figure 2 As shown, in order to ensure a stable working temperature of the battery 2, a heat insulating adhesive 7 is bonded between the battery 2 and the frame 8. On the one hand, the heat insulating effect can be improved to prevent the battery 2 from exchanging heat with the outside through the frame 8. On the other hand, the battery 2 is fixed and limited, and the heat insulating adhesive 7 provides a certain buffer space to prevent the internal battery 2 from colliding with the frame 8 when the battery pack is hit.

[0070] Optionally, refer to Figure 1 and Figure 2 The battery pack further includes a buffer member 9 ; the buffer member 9 is disposed between the second structural adhesive 6 b and the tray 4 , and the second structural adhesive 6 b and the buffer member 9 cover the tray 4 .

[0071] Specifically, if Figure 1 and Figure 2 As shown, a buffer 9 is provided between the second structural adhesive 6b and the tray 4. The buffer 9 includes but is not limited to foam plastic, air cushion or rubber, wherein the foam plastic includes but is not limited to polystyrene foam plastic, polyurethane foam plastic or polypropylene foam plastic, and has good elasticity, compression strength, softness and wear resistance. The buffer 9 is provided at the bottom of the battery pack, which has a buffering and energy-absorbing effect, reduces the collision and extrusion force from the bottom direction, and strengthens the protection of the bottom of the battery pack. The second insulating component 1b and the second structural adhesive 6b cover the edge of the buffer 9, and the buffer 9 covers the outer edge of the tray 4.

[0072] The present utility model also provides an electric device, including the battery pack or insulation assembly described in one of the above embodiments, and the electric device includes but is not limited to an electric vehicle or a battery swap station. The electric vehicle using the above battery pack has improved arc breakdown resistance of the battery pack, and thus the driving safety of the electric vehicle is fully guaranteed.

[0073] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0074] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which are within the protection of the utility model.

Claims

1. An insulating component for a battery pack, characterized in that: It comprises an insulating film (11) and an insulating liquid (12); The insulating film (11) has a cavity, the insulating liquid (12) is filled in the cavity, and the insulating component (1) is suitable for being arranged between a battery in a battery pack and a battery pack fixing structure, or between adjacent batteries in a battery pack.

2. The insulation assembly according to claim 1, characterized in that: The insulating film (11) is a polyimide film, a polyethylene terephthalate film or a polypropylene film.

3. The insulation assembly according to claim 1, characterized in that: The insulating liquid (12) is insulating oil or liquid silicone resin.

4. The insulation assembly according to claim 1, characterized in that: A back glue layer is provided on at least one side surface of the insulating film (11) facing away from the cavity, and the back glue layer is suitable for bonding the insulating component (1) between the battery in the battery pack and the battery pack fixing structure, or bonding the insulating component (1) between adjacent batteries in the battery pack.

5. A battery pack, characterized in that: It comprises a plurality of batteries (2), a liquid cooling assembly (3), a tray (4) and an insulating assembly (1) according to any one of claims 1 to 4; The liquid cooling assembly (3) is arranged on a side of the battery (2) close to the tray (4) and / or a side of the battery (2) away from the tray (4); A first insulating component (1a) is provided between the battery (2) and the liquid cooling component (3), and / or a second insulating component (1b) is provided between the battery (2) and the tray (4).

6. The battery pack according to claim 5, characterized in that: Each of the batteries (2) is located between the liquid cooling assembly (3) and the tray (4), and a third insulating assembly (1c) is provided between at least two adjacent batteries (2).

7. The battery pack according to claim 6, characterized in that: One end of the third insulating component (1c) is sealed and connected to the first insulating component (1a), and the other end of the third insulating component (1c) is sealed and connected to the second insulating component (1b).

8. The battery pack according to claim 5 or 6, characterized in that: The battery pack also includes a thermally conductive adhesive (5); A first thermally conductive adhesive (5a) is bonded between the battery (2) and the first insulating component (1a), and / or a second thermally conductive adhesive (5b) is bonded between the first insulating component (1a) and the liquid cooling component (3).

9. The battery pack according to claim 5 or 6, characterized in that: The battery pack further comprises a structural adhesive (6); A first structural adhesive (6a) is bonded between the battery (2) and the second insulating component (1b), and / or a second structural adhesive (6b) is bonded between the second insulating component (1b) and the tray (4).

10. The battery pack according to claim 6, characterized in that: The battery pack also includes a heat-insulating adhesive (7); The heat-insulating adhesive (7) is at least bonded between the battery (2) and the third insulating component (1c).

11. The battery pack according to claim 10, characterized in that: The battery pack also includes a frame (8); The frame (8) is connected between the liquid cooling assembly (3) and the tray (4), and the frame (8) and the tray (4) are arranged to form a battery accommodating space.

12. The battery pack according to claim 11, characterized in that: The battery pack also includes an upper cover; The upper cover is arranged on a side of the liquid cooling component (3) away from the battery (2), and the upper cover is connected to the frame (8).

13. The battery pack according to claim 11, characterized in that: The heat-insulating adhesive (7) is bonded between the frame (8) and the battery (2).

14. The battery pack according to any one of claims 10 to 13, characterized in that: The thermal insulation glue (7) is aerogel.

15. The battery pack according to claim 9, characterized in that: The battery pack also includes a buffer component (9); The buffer component (9) is arranged between the second structural adhesive (6b) and the tray (4), and the second structural adhesive (6b) and the buffer component (9) cover the tray (4).

16. An electrical device, characterized in that: Comprising the battery pack according to any one of claims 5 to 15 or the insulating assembly according to any one of claims 1 to 4.

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