Battery pack assembly, battery pack assembly and vehicle

Abstract

The utility model discloses a battery pack assembly, a battery pack assembly and a vehicle. The battery pack assembly comprises a tray, a sealing cover, a first heat preservation assembly and a second heat preservation assembly. A sealing cover is connected to the tray to form a housing. A containing space is formed in the shell. The first heat preservation assembly is located in the containing space. A first heat preservation cavity suitable for at least accommodating the battery cell assembly is formed in the first heat preservation assembly. The first thermal insulation assembly is an assembly made of a flexible thermal insulation material. A second heat preservation cavity suitable for containing the shell is formed in the second heat preservation assembly. The shell is contained in the second heat preservation cavity. According to the utility model, a heat transfer path between the battery cell assembly and the shell can be effectively isolated, and when the battery is applied to an environment with relatively large temperature difference between inside and outside, heat dissipation of the battery cell assembly can be remarkably reduced, so that the electric quantity attenuation speed of the battery cell assembly can be reduced, and a longer endurance mileage can be obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack component, a battery pack assembly and a vehicle. Background Art

[0002] The battery of new energy vehicles has problems such as obvious reduction in driving range and doubling of charging time in low temperature environment. These problems seriously restrict the popularization of new energy vehicles in cold areas. The fundamental reason for the degradation of the battery of new energy vehicles in low temperature environment is the decline in the low temperature charging and discharging performance of the power battery. In addition, air conditioning heating and vehicle resistance will further increase the battery degradation rate.

[0003] In the related art, the thermal insulation system of the battery pack includes a hood-type thermal insulation structure and a thermal insulation pad. The hood-type thermal insulation structure and the thermal insulation pad form a closed cavity to accommodate the battery pack. However, when the battery pack is used in some low-temperature areas with a large temperature difference between the inside and outside of the pack, the battery cell assembly will form a heat transfer path with the outside through the metal structure inside the battery pack, especially the heat loss at the contact point between the battery cells in the battery pack and the tray is more obvious and difficult to effectively solve. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above problems, the first aspect of the present invention provides a battery pack assembly, the battery pack assembly comprising:

[0006] tray;

[0007] A sealing cover connected to the tray to form a shell, wherein the interior of the shell forms an accommodating space;

[0008] A first heat-insulating component, the first heat-insulating component is located in the accommodating space, and the interior of the first heat-insulating component forms a first heat-insulating chamber suitable for accommodating at least a battery cell component; and

[0009] A second heat-insulating component, wherein the interior of the second heat-insulating component forms a second heat-insulating chamber suitable for accommodating the shell, and the shell is accommodated in the second heat-insulating chamber.

[0010] According to the battery pack assembly of the first aspect of the utility model, a first thermal insulation component is arranged in the accommodating space of the shell formed by the sealing cover and the tray, and the first thermal insulation chamber formed inside the first thermal insulation component is suitable for accommodating the battery cell assembly, so that when the battery pack assembly is installed with the battery cell assembly, the heat transfer path between the battery cell assembly and the shell can be effectively cut off. By arranging a second thermal insulation component to surround the shell, the internal heat is further prevented from being exchanged with the outside, thereby achieving a better thermal insulation effect. By adopting the above-mentioned technical means, the battery pack assembly of the utility model can significantly reduce the heat dissipation of the battery cell assembly when used in an environment with a large temperature difference between the inside and the outside, thereby reducing the power decay rate of the battery cell assembly, and then obtaining a longer cruising range.

[0011] Optionally, the first heat preservation component includes:

[0012] a first heat-insulating support member connected to the tray and covering at least a surface of the tray facing the accommodating space; and

[0013] A first heat-insulating cover component is sealingly connected to the first heat-insulating support component, and the first heat-insulating cover component is connected to the sealing cover and at least covers a surface of the sealing cover facing the accommodating space.

[0014] Optionally, the tray comprises:

[0015] Two side beams parallel to each other, the side beams extending along the length direction;

[0016] Two end beams parallel to each other, the end beams extending along a width direction, and the end beams connected to ends of the two end beams, the width direction being perpendicular to the length direction; and

[0017] A support member, wherein the support member is at least partially located between the two side beams and connected to the side beams, the support member is lower than the top surface of the side beams in the height direction, the support member is suitable for supporting the battery cell assembly, and the side beams are used to prevent the battery cell assembly located above the support member from moving along the width direction, and the height direction is perpendicular to the length direction and the width direction.

[0018] Optionally, the tray includes two support members, and the two support members are spaced apart along the width direction.

[0019] The first heat preservation supporting member comprises:

[0020] a first heat-insulating support bottom wall connected to an upper portion of the support member and covering a spacing area between two of the side beams; and

[0021] Two first thermal insulation support side walls are arranged opposite to each other, the two first thermal insulation support side walls are located between the two side beams along the width direction, the two first thermal insulation support side walls are connected to the two ends of the first thermal insulation support bottom wall that are arranged opposite to each other along the width direction, and the first thermal insulation support side walls are connected to the side beams and cover the side beams along the width direction.

[0022] Optionally, the battery pack assembly further includes:

[0023] Two baffles, the two baffles are respectively connected to the two end beams, and the two baffles are arranged opposite to each other along the length direction, and the baffles are used to prevent the battery core assembly located on the upper part of the support from moving along the length direction,

[0024] The first heat preservation component also includes:

[0025] Two stop heat-insulating components are respectively connected to surfaces of the two baffles facing each other, and the stop heat-insulating components cover the baffles along the length direction.

[0026] Optionally, the battery pack assembly further comprises a panel and an electrical connection assembly, wherein the panel is located between the first thermal insulation cover and the baffle and is connected to at least one of the end beam and the sealing cover, and the electrical connection assembly is connected to the panel, and along the length direction, the electrical connection assembly protrudes from the outwardly facing surface of the panel,

[0027] The first heat-insulating cover is provided with a first avoidance hole suitable for avoiding the electrical connection component, and the sealing cover is provided with a second avoidance hole suitable for avoiding the electrical connection component.

[0028] Optionally, the battery pack assembly also includes a liquid cooling plate and a liquid cooling joint, the liquid cooling plate having a flow channel suitable for circulating fluid formed inside, the liquid cooling plate is connected to the upper portion of the first thermal insulation support member, the liquid cooling joint passes through one of the two end beams and extends to the outside, and the two liquid cooling joints are connected to the flow channel.

[0029] Optionally, the second heat preservation component includes:

[0030] a second heat-insulating support member connected to the tray and covering at least a surface of the tray facing away from the accommodating space; and

[0031] A second heat-insulating cover is sealed and connected to the second heat-insulating support member. The second heat-insulating cover is connected to the sealing cover and at least covers a surface of the sealing cover that is away from the accommodating space.

[0032] Optionally, the second heat-insulating support member comprises:

[0033] a second supporting and insulating bottom wall, the second supporting and insulating bottom wall being connected to a lower portion of the tray;

[0034] two second supporting and heat-insulating side walls, wherein the second supporting and heat-insulating side walls are connected to ends of the second supporting and heat-insulating bottom wall in the width direction and to the side beams; and

[0035] Two second supporting and heat-insulating end walls, wherein the second supporting and heat-insulating end walls are connected to the ends of the second supporting and heat-insulating bottom wall along the length direction and the end beam.

[0036] Optionally, the battery pack assembly also includes a liquid cooling plate and a liquid cooling joint, the liquid cooling plate having a flow channel suitable for circulating fluid formed inside, the liquid cooling plate is connected to the upper part of the tray, the liquid cooling joint passes through one of the two end beams and extends to the outside, the liquid cooling joint is connected to the flow channel, and one of the two second supporting insulation end walls includes a through hole for penetrating the liquid cooling joint.

[0037] Optionally, the battery pack assembly further comprises a panel and an electrical connection assembly, wherein the panel is arranged corresponding to one of the two end beams, and the electrical connection assembly is connected to the panel, and along the length direction, the electrical connection assembly protrudes from a surface of the panel away from the other end beam,

[0038] The second heat-insulating cover is provided with a third avoidance hole suitable for avoiding the electrical connection component.

[0039] Optionally, at least a portion of at least one of the second thermal insulation support member and the second thermal insulation cover member is constructed as a composite plate member, which includes two surface plates arranged opposite to each other and a sandwich plate sealed between the two surface plates, and the sandwich plate includes a through hole arranged along the thickness direction to enclose the two surface plates to form a closed sandwich cavity.

[0040] Optionally, the first heat-insulating component is constructed as a component made of a flexible heat-insulating material; and / or

[0041] The second heat-insulating component is constructed as a component made of hard heat-insulating material.

[0042] A second aspect of the present invention provides a battery pack assembly, the battery pack assembly comprising:

[0043] The battery pack assembly described above; and

[0044] A battery cell assembly is installed in the first heat preservation chamber of the battery pack assembly.

[0045] According to the battery pack assembly of the second aspect of the utility model, by applying the above-mentioned battery pack components, the heat transfer path between the battery cell assembly and the shell can be effectively isolated, thereby improving the heat preservation effect of the battery cell assembly.

[0046] A third aspect of the present invention provides a vehicle, comprising the above-mentioned battery pack assembly.

[0047] According to the vehicle of the third aspect of the utility model, by applying the above-mentioned battery pack assembly, the vehicle in a lower temperature environment can obtain a more stable and longer cruising range, which is beneficial to the promotion and application of new energy vehicles in relatively cold areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0049] Figure 1 An exploded perspective view of a battery pack assembly according to a preferred embodiment of the present utility model;

[0050] Figure 2 for Figure 1 A perspective view of the battery pack assembly shown;

[0051] Figure 3 for Figure 1 An exploded perspective view of the first insulation component in FIG.

[0052] Figure 4 for Figure 1 An exploded perspective view of the second insulation assembly in FIG. 1 ; and

[0053] Figure 5 The figure is an exploded perspective view of a composite panel according to a preferred embodiment of the present invention.

[0054] Description of reference numerals:

[0055] 100: Battery pack assembly 110: Casing

[0056] 111: Tray 111a: Side beam

[0057] 111b: end beam 111c: support member

[0058] 112: Sealing cover 112a: Cover top wall

[0059] 112b: Cover side wall 112c: Cover end wall

[0060] 112d: second avoidance hole 120: first heat preservation component

[0061] 121: first heat-insulating support member 121a: first heat-insulating support bottom wall

[0062] 121b: first insulation support side wall 121c: first insulation support transition wall

[0063] 122: first heat-insulating cover 122a: first cover heat-insulating top wall

[0064] 122b: First cover insulation side wall 122c: First cover insulation end wall

[0065] 122d: first avoidance hole 123: stop insulation piece

[0066] 130: second heat-insulating assembly 131: second heat-insulating support member

[0067] 131a: Second support and heat-insulating bottom wall 131b: Second support and heat-insulating side wall

[0068] 131c: second support insulation end wall 131d: through hole

[0069] 132: Second heat-insulating cover 132a: Second cover heat-insulating top wall

[0070] 132b: Second cover insulation side wall 132c: Second cover insulation end wall

[0071] 132d: The third avoidance hole 133: Composite plate

[0072] 134: Surface board 135: Sandwich board

[0073] 135a: through hole 140: baffle

[0074] 150: Integrated panel 151: Panel

[0075] 152: Electrical connection assembly 160: Liquid cooling plate

[0076] 170: Liquid cooling connector D1: Length direction

[0077] D2: width direction D3: height direction DETAILED DESCRIPTION

[0078] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0079] In order to fully understand the implementation of the present invention, a detailed structure will be presented in the following description. Obviously, the implementation of the implementation of the present invention is not limited to the specific details familiar to those skilled in the art.

[0080] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention, and the singular forms "a", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, integral bodies, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or combinations thereof.

[0081] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0082] The "parallel" / "vertical" and similar expressions used in the present invention include an absolute parallel / vertical relationship and a roughly parallel / vertical relationship (for example, a relationship that differs from absolute parallel / vertical by -5° to +5°), which can have the same effect.

[0083] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present invention and are not intended to limit the present invention.

[0084] The utility model provides a battery pack assembly 100, a battery pack assembly and a vehicle. The vehicles here include but are not limited to new energy vehicles. The new energy vehicles here may include pure electric vehicles, hybrid vehicles with electric power, extended-range vehicles, pure fuel vehicles and other vehicles that use batteries as one of the energy sources. That is, as long as the vehicle uses batteries or battery cell assemblies or battery packs as energy sources, they are all within the scope of application of the utility model. The vehicle can use batteries or battery cell assemblies or battery packs to supply electrical energy to electrical equipment on the vehicle. The electrical equipment here includes motors, sound and light devices, display devices, charging interfaces, wireless charging seats, etc. The vehicle here includes a battery pack assembly. The battery pack assembly includes a battery pack assembly 100 and a battery cell assembly, and the battery cell assembly is installed inside the battery pack assembly 100.

[0085] The following will refer to Figures 1 to 5 The battery pack assembly 100, the battery pack assembly and the vehicle according to the present invention are described in detail.

[0086] like Figures 1 to 5 As shown, the battery pack assembly 100 according to the utility model may include a tray 111, a sealing cover 112 and a first thermal insulation component 120. The sealing cover 112 is connected to the tray 111 to form a shell 110. The interior of the shell 110 forms an accommodating space. The first thermal insulation component 120 is located in the accommodating space. The interior of the first thermal insulation component 120 forms a first thermal insulation chamber suitable for accommodating at least a battery cell assembly. The first thermal insulation component 120 is configured as a component made of a flexible thermal insulation material. That is, the first thermal insulation chamber formed by the first thermal insulation component 120 is used to accommodate the battery cell assembly. In other words, the first thermal insulation component 120 surrounds the battery cell assembly in the accommodating space of the shell 110.

[0087] According to the battery pack assembly 100 of the utility model, a first heat preservation assembly 120 is arranged in the accommodation space of the shell 110 formed by the sealing cover 112 and the tray 111, and the first heat preservation chamber formed inside the first heat preservation assembly 120 is suitable for accommodating the battery cell assembly, so that when the battery pack assembly 100 is installed with the battery cell assembly, the heat transfer path between the battery cell assembly and the shell 110 can be effectively cut off, so as to achieve the effect of more accurately preventing heat transfer. By adopting the above technical means, the battery pack assembly 100 of the utility model can significantly reduce the heat dissipation of the battery cell assembly when applied to an environment with a large temperature difference between the inside and the outside, thereby reducing the power attenuation rate of the battery cell assembly, and then obtaining a longer driving range. In addition, since the first heat preservation assembly 120 is made of a flexible heat preservation material, it can not only insulate the battery cell assembly, but also serve as a buffer force transmission structure between the shell 110 and the battery cell assembly, so as to better protect the battery cell assembly in terms of force transmission.

[0088] See also Figure 1 and Figure 2 Furthermore, the sealing cover 112 may be fastened to the tray 111 by fasteners such as bolts.

[0089] For example, the first thermal insulation component 120 is constructed as a component or structure made of aerogel felt. The thermal conductivity of aerogel felt is very low, so that the purpose of heat insulation can be achieved. By making the first thermal insulation component 120 of a thermal insulation material such as aerogel felt, precise thermal insulation can be achieved. The first thermal insulation component 120 can isolate the contact between the battery cell assembly and other structural parts, and the aerogel felt does not occupy a large amount of internal space of the battery pack assembly 100, and has excellent thermal insulation function.

[0090] Optionally, the first heat-insulating component 120 may be connected to the shell 110 by bonding or other methods.

[0091] See also Figure 1 and Figure 3 For example, the first thermal insulation component 120 may include a first thermal insulation support member 121 and a first thermal insulation cover member 122. The first thermal insulation support member 121 is connected to the tray 111. The first thermal insulation support member 121 connected to the tray 111 at least covers the surface of the tray 111 facing the accommodating space. The first thermal insulation cover member 122 is sealedly connected to the first thermal insulation support member 121. The first thermal insulation cover member 122 is connected to the sealing cover 112. The first thermal insulation cover member 122 connected to the sealing cover 112 at least covers the surface of the sealing cover 112 facing the accommodating space. When the battery pack assembly 100 is installed with the battery cell assembly, the first thermal insulation support member 121 can block the heat transfer path between the tray 111 and the battery cell assembly, and the first thermal insulation cover member 122 can block the heat transfer path between the sealing cover 112 and the battery cell assembly, thereby achieving the purpose of blocking the heat transfer path between the battery cell assembly and the shell 110 as a whole.

[0092] See also Figures 1 to 3 , further, the tray 111 may include two parallel side beams 111a, two parallel end beams 111b and a support member 111c. The side beam 111a is extended along the length direction D1. The end beam 111b is extended along the width direction D2. And the end beam 111b is connected to the ends of the two end beams 111b. The width direction D2 is perpendicular to the length direction D1. The support member 111c is at least partially located between the two side beams 111a and connected to the side beams 111a. The support member 111c is lower than the top surface of the side beam 111a along the height direction D3. The support member 111c is suitable for supporting the battery cell assembly. The side beam 111a is used to prevent the battery cell assembly located on the upper part of the support member 111c from moving along the width direction D2. The height direction D3 is perpendicular to the length direction D1 and the width direction D2. Here, a square frame is formed by two side beams 111a and two end beams 111b. By arranging a support member 111c on one side of the two side beams 111a close to each other, the battery cell assembly can be supported. Since the support member 111c is lower than the top surface of the side beam 111a in the height direction D3, when the battery cell assembly is placed on the upper part of the support member 111c, the side beam 111a can be used to limit the position of the battery cell assembly along the width direction D2. At this time, the length direction D1 of the battery cell assembly is consistent with the length direction D1 of the tray 111.

[0093] Continue reading Figures 1 to 3, Optionally, the tray 111 may include two support members 111c. The two support members 111c are arranged at intervals along the width direction D2. That is, the structure used to support the battery cell assembly is two support members 111c arranged at intervals, thereby reducing the contact area between the battery cell assembly and the tray 111. Usually, the tray 111 is supported by a metal structure. By adopting two spaced support members 111c as the structure for supporting the battery cell assembly, the weight can be effectively reduced, which is conducive to the lightweight of the battery pack. At the same time, the proportion of the metal structure is also reduced, further reducing the area of ​​the heat transfer structure. The first insulation support member may include a first insulation support bottom wall 121a. Two first insulation support side walls 121b arranged oppositely. The first insulation support bottom wall 121a is connected to the upper part of the support member 111c. The first insulation support bottom wall 121a connected to the upper part of the support frame covers the interval area between the two support members 111c and the two side beams 111a. The two first insulation support side walls 121b are located between the two side beams 111a along the width direction D2. The two first heat-insulating support side walls 121b are connected to the two ends of the first heat-insulating support bottom wall 121a that are arranged oppositely along the width direction D2. The first heat-insulating support side walls 121b are connected to the side beams 111a and cover the side beams 111a along the width direction D2. This increases the coverage area of ​​the heat-insulating structure between the battery cell assembly and the tray 111, thereby achieving full heat insulation of the lower part of the battery cell assembly.

[0094] Continue reading Figures 1 to 3 Further, in the example where the supporting structure of the tray 111 is two spaced apart support members 111c, the portion of the second support insulation bottom wall 131a corresponding to the two support members 111c may be recessed downward to form a first insulation support transition wall 121c (eg Figure 3 As shown). In a plane perpendicular to the length direction D1, the projection of the first thermal insulation support transition wall 121c is close to a U shape. In this way, the first thermal insulation support transition wall 121c can be used to fill the gap between the two support members 111c, and contact the second thermal insulation component 130 together with the tray 111. Moreover, since the first thermal insulation support transition wall 121c can also cover the surfaces of the two support members 111c facing each other along the width direction D2, the heat transfer path is further reduced. Furthermore, compared with the portion of the first thermal insulation support bottom wall 121a located on the upper part of the support member 111c, since the middle part of the first thermal insulation support transition wall 121c is lower in the height direction D3, the battery core assembly located on the upper part of the first thermal insulation support member 121 is spaced apart from the first thermal insulation support transition wall 121c in the height direction D3, and the air contained in the gap can further block the heat transfer path.

[0095] See also Figure 1 and Figure 3In addition, the battery pack assembly 100 may further include two baffles 140. The two baffles 140 are respectively connected to the two end beams 111b. And the two baffles 140 are arranged oppositely along the length direction D1. The baffle 140 is used to prevent the battery cell assembly located on the upper part of the support member 111c from moving along the length direction D1. The first insulation assembly 120 may further include two stop insulation members 123. The two stop insulation members 123 are respectively connected to the surfaces of the two baffles 140 facing each other. The stop insulation member 123 covers the baffle 140 along the length direction D1. By respectively arranging baffles 140 at the two end beams 111b, it is used to limit the battery cell assembly in the length direction D1, and at the same time, the two ends of the battery cell assembly along the length direction D1 can be protected. By arranging the stop insulation member 123 on the surfaces of the two stop insulation members 123 facing each other, the purpose of isolating the heat transfer path between the battery cell assembly and the baffle 140 is achieved.

[0096] See also Figures 1 to 3 In addition, the battery pack assembly 100 may also include an integrated panel 151. The integrated panel 151 includes a panel 151 and an electrical connection assembly 152. That is, the integrated panel 151 can be understood as a circuit board or an integrated electrical connector that integrates a board with various electrical connectors. The panel 151 is located between the first thermal insulation cover 122 and the baffle 140 and is connected to at least one of an end beam 111b and a sealing cover 112. The first thermal insulation cover 122 is located on the outside of the two baffles 140 along the length direction D1. The electrical connection assembly is connected to the panel 151. Along the length direction D1, the electrical connection assembly protrudes from the outward-facing surface of the panel 151. The electrical connection assembly may include positive and negative electrode interfaces, a battery pack maintenance switch, a low-voltage connector, a heating information port, etc. The first thermal insulation cover 122 is provided with a first avoidance hole 122d suitable for avoiding the electrical connection assembly 152. That is, the electrical connection component 152 can pass through or be exposed in the first avoidance hole 122d of the first thermal insulation cover 122, so as to facilitate the connection of the electrical connection component 152 with the electrical equipment or the distribution box. The sealing cover 112 is provided with a second avoidance hole 112d suitable for avoiding the electrical connection component 152. The function and role of the second avoidance hole 112d are the same as those of the first avoidance hole 122d. Here, in addition to the first avoidance hole 122d being provided in the part corresponding to the integrated panel 151, the rest of the first thermal insulation cover 122 can completely block the heat transfer path between the battery cell assembly and the sealing cover 112. Moreover, the two baffles 140 are provided with a stop insulation component 123 on the side facing each other, so as to compensate for the insulation gap at the first avoidance hole 122d.

[0097] Continue reading Figures 1 to 3For example, a plurality of threaded holes may be arranged around the panel 151 to be connected to the periphery of the sealing cover 112 provided with the second avoidance hole 112d by fasteners such as screws to close the second avoidance hole 112d of the sealing cover 112.

[0098] In some embodiments, a wire hole may be provided on the baffle 140 near the integrated panel 151 so that the electrical connection assembly 152 can be electrically connected to the battery cell assembly.

[0099] Continue reading Figure 1 and Figure 2 In addition, the battery pack assembly 100 may also include a liquid cooling plate 160 and a liquid cooling joint 170. A flow channel suitable for circulating fluid is formed inside the liquid cooling plate 160. The liquid cooling plate 160 is connected to the upper part of the first thermal insulation support 121. The liquid cooling joint 170 passes through one of the two end beams 111b and extends to the outside. The two liquid cooling joints 170 are connected to the flow channel. On the basis of setting the first thermal insulation support 121, by setting the liquid cooling plate 160 on the upper part of the first thermal insulation support 121, it is possible to ensure heat exchange between the battery cell assembly and the liquid cooling plate 160, and the fluid in the liquid cooling plate 160 is conducive to controllable utilization after absorbing the heat of the battery cell assembly, thereby helping to effectively utilize the heat generated by the battery cell assembly while keeping the battery cell assembly warm.

[0100] exist Figure 1 and Figure 3In the example shown, the sealing cover 112 may include a cover top wall 112a, two cover side walls 112b arranged oppositely, and two cover end walls 112c arranged oppositely. The cover side wall 112b is connected to the end of the cover top wall 112a along the width direction D2. The cover end wall 112c is connected to the end of the cover top wall 112a along the length direction D1. Among them, one of the two cover end walls 112c is provided with the above-mentioned second avoidance hole 112d. The cover top wall 112a, the cover side wall 112b and the cover end wall 112c of the sealing cover 112 here can be constructed as an integral part, or can be fixed together by welding or the like. The sealing cover 112 is a non-detachable structure. Accordingly, the first heat-insulating cover 122 may include a first cover heat-insulating top wall 122a, two first cover heat-insulating side walls 122b and two first cover heat-insulating end walls 122c. The first cover heat-insulating top wall 122a is connected to the cover top wall 112a. The first cover insulation side wall 122b is connected to the end of the first cover insulation top wall 122a along the width direction D2 and the cover side wall 112b. The first cover insulation end wall 122c is connected to the end of the first cover insulation top wall 122a along the length direction D1 and the cover end wall 112c. Among them, one of the two first cover insulation end walls 122c is provided with the above-mentioned first avoidance hole 122d. The hole position of the first avoidance hole 122d is aligned with the second avoidance hole 112d. The various parts of the first cover insulation top wall 122a, the two first cover insulation side walls 122b and the two first cover insulation end walls 122c of the first insulation cover 122 can be arbitrarily combined to form an integrated part, or can be fixed together by bonding, welding, etc., or can each be an independent part.

[0101] See also Figure 1 , Figure 2 as well as Figure 4 In addition, the battery pack assembly 100 may also include a second insulation component 130. The interior of the second insulation component 130 forms a second insulation chamber suitable for accommodating the shell 110. The second insulation component 130 is constructed as a component made of a hard insulation material. The shell 110 is accommodated in the second insulation chamber. By providing the second insulation component 130 to surround the above-mentioned shell 110, the internal heat exchange with the outside is further prevented, thereby achieving a better insulation effect. That is, the second insulation component 130 can achieve a more efficient passive insulation effect of the battery pack assembly 100. Especially when the battery pack is used in relatively cold areas, it can solve the problem that the large temperature difference between the inside and the outside easily leads to heat in the battery pack and then causes the battery to decay. At the same time, since the second insulation component 130 is made of a hard insulation material, the shell 110 can be better protected on the outside of the shell 110.

[0102] See also Figure 1 , Figure 2 as well as Figure 4For example, the second thermal insulation component 130 may include a second thermal insulation support member 131 and a second thermal insulation cover member 132. The second thermal insulation support member 131 is connected to the tray 111. The second thermal insulation support member 131 connected to the tray 111 at least covers the surface of the tray 111 that faces away from the accommodating space. The second thermal insulation cover member 132 is sealingly connected to the second thermal insulation support member 131. The second thermal insulation cover member 132 is connected to the sealing cover 112. The second thermal insulation cover member 132 connected to the sealing cover 112 at least covers the surface of the sealing cover 112 that faces away from the accommodating space. The tray 111 is insulated and heat-insulated on the outside of the tray 111 by the second thermal insulation support member 131, and is directly in contact with the outside world as a part of the support structure supporting the battery pack assembly 100. The second thermal insulation cover 132 covers the outside of the sealing cover 112 and cooperates with the second thermal insulation support 131 to form another thermal insulation structure layer on the outside of the shell 110. When used in conjunction with the first thermal insulation component 120, better thermal insulation effect can be achieved.

[0103] Optionally, the second heat-insulating component 130 may be connected to the shell 110 by bonding or the like.

[0104] For example, the second thermal insulation component 130 can be constructed as a component made of a hard thermal insulation material such as polyurethane. These hard thermal insulation materials can improve the overall strength of the battery pack while having a lower thermal conductivity, thereby also achieving the purpose of thermal insulation. By making the second thermal insulation component 130 out of a hard thermal insulation material of polyurethane, the outside of the shell 110 can be insulated, heat-insulated and heat-insulated, thereby isolating the heat exchange between the shell 110 and the vehicle's cabin, chassis and air. The cabin here is the structure on the vehicle for accommodating the battery pack assembly. The second thermal insulation component 130 here can not only protect the shell 110 of the battery pack assembly 100, but also has good thermal insulation performance.

[0105] Continue reading Figure 1 , Figure 2 as well as Figure 4, further, the second thermal insulation support member 131 may include a second support thermal insulation bottom wall 131a, two second support thermal insulation side walls 131b and two second support thermal insulation end walls 131c. The second support thermal insulation bottom wall 131a is connected to the lower part of the tray 111. The second support thermal insulation side wall 131b is connected to the end of the second support thermal insulation bottom wall 131a along the width direction D2 and the side beam 111a. The second support thermal insulation end wall 131c is connected to the end of the second support thermal insulation bottom wall 131a along the length direction D1 and the end beam 111b. Here, the second support thermal insulation bottom wall 131a is used to cover at least the support member 111c of the tray 111, and the second support thermal insulation side wall 131b is used to cover the surfaces of the two side beams 111a facing each other, so as to form a more comprehensive insulation layer between the tray 111 and the battery cell assembly to be supported, so as to achieve a more accurate and comprehensive thermal insulation effect.

[0106] See also Figure 1 , Figure 2 as well as Figure 4 For example, the liquid cooling joint 170 passes through one of the two end beams 111b and extends to the outside so as to be connected to an external cooling pipeline. The liquid cooling joint 170 is connected to the flow channel. One of the two second support insulation end walls 131c includes a through hole 131d for passing the liquid cooling joint 170. The through hole 131d is opened in the second support insulation end wall 131c adjacent to the liquid cooling joint 170 to allow the liquid cooling joint 170 to pass through the second support insulation end wall 131c and extend to the outside of the second insulation assembly 130.

[0107] See also Figure 1 , Figure 2 as well as Figure 4 For example, the panel 151 is arranged corresponding to one of the two end beams 111b. The second heat-insulating cover 132 is provided with a third avoidance hole 132d suitable for avoiding the electrical connection component 152. The third avoidance hole 132d is provided in the second heat-insulating cover 132 to facilitate the connection of the electrical connection component with other circuit structures or electrical connection devices.

[0108] See also Figure 1 , Figure 2 as well as Figure 4For example, the second thermal insulation cover 132 may include a second cover thermal insulation top wall 132a, two second cover thermal insulation side walls 132b and two second cover thermal insulation end walls 132c. The second cover thermal insulation top wall 132a is connected to the cover top wall 112a. The second cover thermal insulation side wall 132b is connected to the end of the second cover thermal insulation top wall 132a along the width direction D2 and the cover side wall 112b. The second cover thermal insulation end wall 132c is connected to the end of the second cover thermal insulation top wall 132a along the length direction D1 and the cover end wall 112c. Among them, one of the two second cover thermal insulation end walls 132c is provided with the above-mentioned third avoidance hole 132d, and the third avoidance hole 132d is arranged corresponding to the first avoidance hole 122d and the second avoidance hole 112d along the length direction D1. Here, the second cover insulation top wall 132a, the two second cover insulation side walls 132b and the two second cover insulation end walls 132c of the second insulation cover member 132 can be arbitrarily combined to form an integral part, or can be fixed together by bonding, welding, etc., or can each be an independent part.

[0109] See also Figure 1 , Figure 2 , Figure 4 as well as Figure 5 For example, at least a portion of at least one of the second thermal insulation support member 131 and the second thermal insulation cover member 132 is constructed as a composite plate member 133. The composite plate member 133 includes two surface plates 134 arranged opposite to each other and a sandwich plate 135 sealed and connected between the two surface plates 134. The sandwich plate 135 includes a through hole 135a extending through the thickness direction to enclose the two surface plates 134 to form a closed sandwich cavity. This helps to achieve lightweighting of the second thermal insulation assembly 130, reduce the heat transfer coefficient, and enhance the thermal insulation effect.

[0110] Continue reading Figure 1 , Figure 2 , Figure 4 as well as Figure 5 Optionally, the through holes 135a are distributed in an array on the sandwich plate 135. For example, they can be distributed in a honeycomb shape. In this way, the second thermal insulation support member 131 can be lightweight and the thermal insulation performance can be improved. By distributing the through holes 135a in an array, a plurality of honeycomb-shaped cavity structures can be formed inside the composite plate 133, and the honeycomb cavities are used to store gas, thereby reducing the contact area of ​​the two surface plates 134 of the composite plate 133 in the thickness direction, improving the thermal insulation effect of the composite plate 133 itself, and thus improving the thermal insulation effect.

[0111] According to the battery pack assembly 100 of the present invention, by providing the first thermal insulation component 120 and the second thermal insulation component 130, an isolation heat insulation layer is formed inside the battery pack assembly 100 and a protective thermal insulation layer is formed outside the battery pack assembly 100, thereby having precise and efficient thermal insulation performance. By combining the two thermal insulation layers formed by the above-mentioned first thermal insulation component 120 and the second thermal insulation component 130 with the battery pack, the heat transfer path can be accurately isolated, thereby blocking the heat exchange path between the inside and the inside, the inside and the outside, and the outside and the environment of the battery pack. In addition, the battery pack assembly 100 of the present invention can reduce the temperature drop rate of the battery pack without consuming battery energy, thereby achieving an excellent passive thermal insulation effect. At the same time, according to the characteristics of the thermal insulation material, it has the auxiliary functions of isolating the battery cell assembly from the metal components, protecting the battery pack from collision, and insulating the package.

[0112] The utility model also provides a battery pack assembly. The battery pack assembly may include the above-mentioned battery pack assembly 100 and a battery cell assembly. The battery cell assembly is installed in the first heat preservation chamber of the battery pack assembly 100.

[0113] According to the battery pack assembly of the present invention, by applying the above-mentioned battery pack assembly 100, the heat transfer path between the battery cell assembly and the shell 110 can be effectively isolated, thereby improving the heat preservation effect of the battery cell assembly.

[0114] The utility model further provides a vehicle, which may include the battery pack assembly 100 described above.

[0115] According to the vehicle of the present invention, by applying the above-mentioned battery pack assembly, the vehicle in a relatively low temperature environment can obtain a more stable and longer cruising range, which is beneficial to the promotion and application of new energy vehicles in relatively cold areas.

[0116] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0117] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A battery pack assembly, characterized in that: The battery pack assembly comprises: tray; A sealing cover connected to the tray to form a shell, wherein the interior of the shell forms an accommodating space; A first heat-insulating component, the first heat-insulating component is located in the accommodating space, and the interior of the first heat-insulating component forms a first heat-insulating chamber suitable for accommodating at least a battery cell component; and A second heat-insulating component, wherein the interior of the second heat-insulating component forms a second heat-insulating chamber suitable for accommodating the shell, and the shell is accommodated in the second heat-insulating chamber.

2. The battery pack assembly according to claim 1, characterized in that: The first heat preservation component comprises: a first heat-insulating support member connected to the tray and covering at least a surface of the tray facing the accommodating space; and A first heat-insulating cover component is sealingly connected to the first heat-insulating support component, and the first heat-insulating cover component is connected to the sealing cover and at least covers a surface of the sealing cover facing the accommodating space.

3. The battery pack assembly according to claim 2, characterized in that: The tray comprises: Two side beams parallel to each other, the side beams extending along the length direction; Two end beams parallel to each other, the end beams extending along a width direction, and the end beams connected to ends of the two end beams, the width direction being perpendicular to the length direction; and A support member, wherein the support member is at least partially located between the two side beams and connected to the side beams, the support member is lower than the top surface of the side beams in the height direction, the support member is suitable for supporting the battery cell assembly, and the side beams are used to prevent the battery cell assembly located above the support member from moving along the width direction, and the height direction is perpendicular to the length direction and the width direction.

4. The battery pack assembly according to claim 3, characterized in that: The tray includes two support members, and the two support members are arranged at intervals along the width direction. The first heat preservation supporting member comprises: a first heat-insulating support bottom wall connected to an upper portion of the support member and covering a spacing area between two of the side beams; and Two first thermal insulation support side walls are arranged opposite to each other, the two first thermal insulation support side walls are located between the two side beams along the width direction, the two first thermal insulation support side walls are connected to the two ends of the first thermal insulation support bottom wall that are arranged opposite to each other along the width direction, and the first thermal insulation support side walls are connected to the side beams and cover the side beams along the width direction.

5. The battery pack assembly according to claim 3, characterized in that: The battery pack assembly further comprises: Two baffles, the two baffles are respectively connected to the two end beams, and the two baffles are arranged opposite to each other along the length direction, and the baffles are used to prevent the battery core assembly located on the upper part of the support from moving along the length direction, The first heat preservation component also includes: Two stop heat-insulating components are respectively connected to surfaces of the two baffles facing each other, and the stop heat-insulating components cover the baffles along the length direction.

6. The battery pack assembly according to claim 3, characterized in that: The battery pack assembly further comprises a panel and an electrical connection assembly, wherein the panel is located between the first heat-insulating cover and the baffle and is connected to at least one of the end beam and the sealing cover, and the electrical connection assembly is connected to the panel, and along the length direction, the electrical connection assembly protrudes from the outwardly facing surface of the panel, The first heat-insulating cover is provided with a first avoidance hole suitable for avoiding the electrical connection component, and the sealing cover is provided with a second avoidance hole suitable for avoiding the electrical connection component.

7. The battery pack assembly according to claim 3, characterized in that: The battery pack assembly also includes a liquid cooling plate and a liquid cooling joint. A flow channel suitable for circulating fluid is formed inside the liquid cooling plate. The liquid cooling plate is connected to the upper part of the first thermal insulation support member. The liquid cooling joint passes through one of the two end beams and extends to the outside. The two liquid cooling joints are connected to the flow channel.

8. The battery pack assembly according to any one of claims 3 to 7, characterized in that: The second heat preservation component comprises: a second heat-insulating support member connected to the tray and covering at least a surface of the tray facing away from the accommodating space; and A second heat-insulating cover is sealed and connected to the second heat-insulating support member. The second heat-insulating cover is connected to the sealing cover and at least covers a surface of the sealing cover that is away from the accommodating space.

9. The battery pack assembly according to claim 8, characterized in that: The second heat-insulating support member comprises: a second supporting and insulating bottom wall, the second supporting and insulating bottom wall being connected to a lower portion of the tray; two second supporting and heat-insulating side walls, wherein the second supporting and heat-insulating side walls are connected to ends of the second supporting and heat-insulating bottom wall in the width direction and to the side beams; and Two second supporting and heat-insulating end walls, wherein the second supporting and heat-insulating end walls are connected to the ends of the second supporting and heat-insulating bottom wall along the length direction and the end beam.

10. The battery pack assembly according to claim 9, characterized in that: The battery pack assembly also includes a liquid cooling plate and a liquid cooling joint. A flow channel suitable for circulating fluid is formed inside the liquid cooling plate. The liquid cooling plate is connected to the upper part of the tray. The liquid cooling joint passes through one of the two end beams and extends to the outside. The liquid cooling joint is connected to the flow channel. One of the two second supporting insulation end walls includes a through hole for penetrating the liquid cooling joint.

11. The battery pack assembly according to claim 8, characterized in that: The battery pack assembly further includes a panel and an electrical connection assembly, wherein the panel is disposed corresponding to one of the two end beams, and the electrical connection assembly is connected to the panel. Along the length direction, the electrical connection assembly protrudes from a surface of the panel away from the other end beam. The second heat-insulating cover is provided with a third avoidance hole suitable for avoiding the electrical connection component.

12. The battery pack assembly according to claim 8, characterized in that: At least a portion of at least one of the second thermal insulation support member and the second thermal insulation cover member is constructed as a composite plate member, which includes two surface plates arranged opposite to each other and a sandwich plate sealed and connected between the two surface plates, and the sandwich plate includes a through hole arranged along the thickness direction to enclose the two surface plates to form a closed sandwich cavity.

13. The battery pack assembly according to any one of claims 1 to 7, characterized in that: The first heat-insulating component is constructed as a component made of a flexible heat-insulating material; and / or The second heat-insulating component is constructed as a component made of hard heat-insulating material.

14. A battery pack assembly, characterized in that: The battery pack assembly comprises: The battery pack assembly according to any one of claims 1 to 13; and A battery cell assembly is installed in the first heat preservation chamber of the battery pack assembly.

15. A vehicle, characterized in that: The vehicle includes the battery pack assembly according to claim 14.

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