Battery insulation rack and battery pack

Abstract

The present application relates to a battery insulation rack and a battery pack, including a top insulation part and a side insulation part, wherein the top insulation part is arranged on one side of the battery pack along the Z direction. The side insulation parts are arranged on both sides of the top insulation part at relative intervals along the X direction, and are respectively connected to the same side of the top insulation part along the Z direction, so as to enclose together with the top insulation part to form an insulation space for covering the battery pack. Among them, the side insulation part is configured to form a cavity with the inner wall of the battery box along the X direction, and one end of the side insulation part away from the top insulation part along the X direction abuts against the inner wall of the battery box, so that the side insulation part can block the condensed water in the battery box from flowing from the cavity to the insulation space. The battery insulation rack of the present application can be used for multiple purposes and has richer functions.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to a battery insulation frame and a battery pack. Background Art

[0002] The battery pack of the battery pack is prone to heat spread, fire, explosion, etc. after thermal runaway, which is a major hidden danger that seriously threatens the safety of electric vehicle drivers and passengers. When the battery pack is in thermal runaway, it will generate a large amount of heat source and gas. The conventional thermal runaway protection solution is to stick a mica board or other insulation structure on the inside of the battery pack box to block the battery pack and the box to prevent heat spread. The conventional insulation structure only has a single function of heat insulation. Summary of the invention

[0003] Based on this, it is necessary to provide a battery insulation rack and a battery pack to address the problem of single insulation structure function in conventional battery pack insulation solutions.

[0004] In a first aspect, the present application provides a battery heat insulation frame for heat insulation between a battery box and a battery pack of a battery pack, the battery heat insulation frame comprising:

[0005] A top heat insulating portion, arranged on one side of the battery pack along the Z direction; and

[0006] Side insulation parts are arranged at opposite sides of the top insulation part in the X direction and are connected to the same side of the top insulation part in the Z direction to form an insulation space for covering the battery pack together with the top insulation part;

[0007] The side insulation portion is configured to form a cavity with the inner wall of the battery box along the X direction, and one end of the side insulation portion away from the top insulation portion along the X direction abuts against the inner wall of the battery box, so that the side insulation portion can block the condensed water in the battery box from flowing from the cavity to the insulation space.

[0008] In some embodiments, the side insulation portion is bent along the Z direction away from the top insulation portion to form a folded edge, and the folded edge extends along the X direction toward the side away from the insulation space, and the folded edge is used to abut against the inner wall of the battery box.

[0009] In some embodiments, the folded edge has an inclined surface, which is arranged toward the side where the top insulation portion is located, and the height of the inclined surface in the Z direction decreases from one end close to the insulation space to the other end opposite thereto.

[0010] In some embodiments, the top insulation portion includes a first insulation layer and a second insulation layer, and the first insulation layer and the second insulation layer are spaced apart in the Z direction to form an exhaust passage communicating with the insulation space;

[0011] The second heat-insulating layer is connected to the side heat-insulating portion in one piece or in a separate piece, and the two together form the heat-insulating space.

[0012] In some embodiments, the second thermal insulation layer is provided with an air hole connecting the exhaust channel and the thermal insulation space, and the position of the air hole corresponds to the position of the pressure relief portion of the battery pack.

[0013] In some embodiments, the exhaust channel has an exhaust port located at an edge of the top insulation portion.

[0014] In some embodiments, a guide tube is protruding from the inner wall of the second heat insulation layer located at the heat insulation space, and the guide tube is arranged opposite to the air hole to cover the pressure relief part of the battery pack.

[0015] In some embodiments, the top insulation portion further includes an insulation support member, and a plurality of the insulation support members are disposed in the exhaust passage to support the inner walls of the first insulation layer and the second insulation layer on opposite sides in the Z direction.

[0016] In some embodiments, the plurality of air holes are spaced apart along the Y direction, and the heat insulating support member is disposed between the adjacent air holes along the Y direction.

[0017] In some embodiments, the top heat insulating portion has an exposure hole that penetrates both the first heat insulating layer and the second heat insulating layer, and the exposure hole is used to expose a partial area of ​​the battery pack located outside the pressure relief portion.

[0018] In some embodiments, a flanged tube is formed on the inner wall of the first thermal insulation layer and protrudes toward the second thermal insulation layer to surround the exposure hole. The flanged tube is fitted and connected to the inner wall of the second thermal insulation layer facing away from the insulation space to isolate the exhaust passage from the exposure hole.

[0019] In some embodiments, the battery insulation frame is provided with a fixing portion for fixedly connecting with the battery box.

[0020] In some embodiments, at least one end of the second heat insulation layer in the Y direction is bent away from the heat insulation space to form a first fixed flange, and the fixing portion includes the first fixed flange.

[0021] In some embodiments, the side insulation portion is bent away from the insulation space at at least one end in the Y direction to form a second fixed flange, and the fixed portion includes the second fixed flange.

[0022] In a second aspect, the present application provides a battery pack, the battery pack comprising:

[0023] Battery box;

[0024] battery pack; and,

[0025] As described in any of the above embodiments, the battery heat insulation frame is arranged in the battery box, and the heat insulation space is separated and formed in the battery box, and the battery pack is located in the heat insulation space.

[0026] In some embodiments, the battery box includes a side beam and a bottom plate, the bottom plate is arranged at one end of the side beam, the side heat insulation portion is abutted against the bottom plate, and the cavity is formed between the side beam, and the battery pack is supported on the bottom plate.

[0027] In some embodiments, an explosion-proof structure is provided on the side beam, and the explosion-proof structure is arranged opposite to the side insulation portion.

[0028] In some embodiments, the top insulation portion has an exhaust channel connected to the insulation space, and an exhaust port of the exhaust channel is located at an edge of the top insulation portion for exhausting air to the side where the explosion-proof structure is located.

[0029] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0030] The battery heat insulation rack and battery pack, through the top heat insulation part and the side heat insulation part, form a heat insulation space for covering the battery pack, separating the battery pack from the battery box, effectively preventing the battery pack from thermal runaway from spreading to the battery box and causing greater safety damage. In addition, the side heat insulation part can also block the condensed water in the battery box from flowing into the heat insulation space, so that the battery heat insulation rack can be used for multiple purposes and has richer functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0032] Figure 1 Schematic diagram of the structure of a battery insulation frame in some embodiments.

[0033] Figure 2 for Figure 1 An exploded schematic diagram of the battery thermal insulation frame is shown.

[0034] Figure 3 for Figure 1 A partial structural schematic diagram of a battery thermal insulation frame is shown.

[0035] Figure 4 for Figure 1The battery heat insulation frame shown is applied to the battery pack.

[0036] Figure 5 Schematic diagram of the structure of the first thermal insulation layer in some embodiments.

[0037] Figure 6 Schematic diagram of the structure of the battery pack of some embodiments.

[0038] Figure 7 for Figure 6 Exploded view of the battery pack shown.

[0039] Figure 8 for Figure 1 The schematic diagram of the structure of the battery insulation frame after removing the first insulation layer is shown.

[0040] Fig. 9 Schematic diagram of the internal structure of a battery insulation frame in some embodiments.

[0041] Fig.10 Schematic diagram of the structure of the first thermal insulation layer in some embodiments.

[0042] Fig.11 Schematic diagram of the internal structure of a battery insulation frame in some embodiments.

[0043] Fig.12 Schematic diagram of the fixing scheme of the battery box and the battery insulation frame in some embodiments.

[0044] The reference numerals in the specific implementation manner are as follows:

[0045] 1000, battery pack; 100, battery insulation frame; K, insulation space; 10, top insulation part; 11, first insulation layer; 12, second insulation layer; 13, exhaust channel; 13a, exhaust port; 14, air hole; 15, guide tube; 16, insulation support; 17, exposure hole; 18, flange tube; 20, side insulation part; 21, folded edge; 22, inclined surface; 40, fixed part; 41, first fixed flange; 42, second fixed flange; 200, battery box; 201, side beam; 202, bottom plate; 300, battery pack; 301, pressure relief part; 400, explosion-proof structure. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0047] In the description of the present application, it should be understood that terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships, if any, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In addition, if present, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In this application, unless otherwise clearly specified and limited, if any, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In the present application, if it appears, unless otherwise clearly specified and limited, a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature “above”, “above” and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature “below”, “below” and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] It should be noted that, if present, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0052] In view of the problems raised in the background technology, the present application provides a battery heat insulation frame and a battery pack. The battery heat insulation frame is used for heat insulation between a battery box and a battery group of a battery pack.

[0053] The battery pack involved in the embodiment of the present application includes a battery box and a battery pack in addition to a battery insulation frame, and the battery insulation frame and the battery pack are both arranged in the battery box. In one example, the battery box includes a box body and a box cover, and the box cover covers the box body, and the two together form the internal accommodation space of the battery box. Usually, the top wall of the battery box is located on the box cover, and the side walls and bottom walls of the battery box are located on the box body.

[0054] The battery pack includes a plurality of battery cells, which are the smallest units of the battery pack for electrochemical reactions. The plurality of battery cells in the battery pack can be connected in series, in parallel, or in a mixed connection. The battery cell may be a soft-pack battery cell, a hard-shell battery cell, or the like. In one example, the battery cell includes a housing, an electrode assembly contained in the housing, and an electrolyte. The electrode assembly generally includes a positive electrode sheet, a negative electrode sheet, and a diaphragm insulating and isolating the positive electrode sheet and the negative electrode sheet. The electrode assembly may be a winding type or a stacked type. The battery cell generally has a pressure relief portion, which may be a thinning notch, a pressure relief valve, or the like provided on the battery cell housing, and is used to open when the internal pressure of the battery cell is too high due to thermal runaway, so as to relieve the pressure on the battery cell. In the embodiments of the present application, the specific structure of the battery cell is not specifically limited.

[0055] The battery insulation frame provided in the embodiment of the present application is introduced in detail below.

[0056] Figure 1 Schematic diagram of the structure of the battery heat insulation frame 100 of some embodiments. Figure 1The battery insulation frame 100 proposed in the embodiment of the present application includes a top insulation part 10 and a side insulation part 20. The top insulation part 10 is used to be arranged on one side of the battery pack 300 along the Z direction. The side insulation parts 20 are arranged on both sides of the top insulation part 10 with relative spacing along the X direction, and are respectively connected to the same side of the top insulation part 10 along the Z direction, so as to enclose together with the top insulation part 10 to form an insulation space K for covering the battery pack 300. Among them, the side insulation part 20 is configured to form a cavity with the inner wall of the battery box 200 along the X direction, and one end of the side insulation part 20 away from the top insulation part 10 along the X direction abuts against the inner wall of the battery box 200, so that the side insulation part 20 can prevent the condensed water in the battery box 200 from flowing from the cavity to the insulation space K.

[0057] The top heat insulation part 10 and the side heat insulation part 20 can be integrally formed or separately connected, and both are made of heat insulation materials and have a heat insulation effect. Regarding the specific type of heat insulation material used, those skilled in the art can make conventional choices, such as polyurethane, phenolic resin, etc. When the top heat insulation part 10 and the side heat insulation part 20 are made of plastic heat insulation materials, the two can be integrally formed by injection molding to obtain a battery heat insulation rack 100, and the production efficiency is relatively high.

[0058] When the battery heat insulation frame 100 is applied to the battery pack 1000, the top heat insulation part 10 is usually opposite to the top wall of the battery box 200, and the side heat insulation part 20 is opposite to the side wall of the battery box 200, and is supported on the bottom wall of the battery box 200 together with the battery pack 300. The top heat insulation part 10 is generally plate-shaped, and is arranged on one side of the battery pack 300 along the Z direction, that is, the heat insulation is between the top wall of the box and the battery pack 300.

[0059] At least two side insulation parts 20 are arranged on the same side of the top insulation part 10 along the Z direction, and at least two side insulation parts 20 are arranged on the two ends of the top insulation part 10 that are arranged opposite to each other along the X direction. Specifically, two side insulation parts 20 can be configured, and the two side insulation parts 20 are arranged at the two ends of the top insulation part 10 that are arranged opposite to each other along the X direction. Specifically, four side insulation parts 20 can also be configured, wherein two side insulation parts 20 are arranged at the two ends of the top insulation part 10 that are arranged opposite to each other along the X direction, and the other two side insulation parts 20 are arranged at the two ends of the top insulation part 10 that are arranged opposite to each other along the Y direction. The side insulation parts 20 insulate between the battery pack 300 and the side wall of the box.

[0060] In the embodiment of the present application, the Z direction generally corresponds to the vertical direction, the X direction and the Y direction generally correspond to the horizontal directions, and the three directions are approximately perpendicular to each other.

[0061] The top insulation part 10 and the side insulation part 20 enclose an insulation space K that can cover the outside of the battery pack 300, so that the battery pack 300 is insulated from the top wall and the side wall of the box, reducing the risk of thermal runaway of the battery pack 300 spreading to the battery box 200.

[0062] The side heat insulating part 20 forms a cavity with the inner wall of the battery box 200 (usually the side wall of the box) along the X direction, and the condensed water in the battery box 200 can flow into the cavity. The volume of the cavity is usually small to improve the space utilization of the battery box 200. One end of the side heat insulating part 20 away from the top heat insulating part 10 along the X direction (usually the bottom end of the side heat insulating part 20) abuts against the inner wall of the battery box 200 (usually the bottom wall of the box), so that the side heat insulating part 20 can block the condensed water in the cavity from entering the insulation space K, and prevent the condensed water from contacting the battery pack 300 and causing the insulation failure of the battery pack 300.

[0063] The battery heat insulation rack 100 of the embodiment of the present application forms a heat insulation space K for covering the battery pack 300 by enclosing the top heat insulation part 10 and the side heat insulation part 20, separating the battery pack 300 from the battery box 200, and effectively preventing the thermal runaway of the battery pack 300 from spreading to the battery box 200 and causing greater safety damage. In addition, the side heat insulation part 20 can also block the condensed water in the battery box 200 from flowing into the heat insulation space K, so that the battery heat insulation rack 100 can be used for multiple purposes and has richer functions.

[0064] Figure 2 for Figure 1 An exploded schematic diagram of a battery thermal insulation frame 100 is shown.

[0065] In some embodiments, reference Figure 1 and Figure 2 The side insulation part 20 is bent along the Z direction away from the top insulation part 10 to form a folded edge 21, and the folded edge 21 extends along the X direction toward the side away from the insulation space K. The folded edge 21 is used to abut against the inner wall of the battery box 200.

[0066] Specifically, the bottom end of the side heat insulating portion 20 is bent to form a folded edge 21, which extends away from the heat insulating space K and is used to abut against the bottom wall of the battery box 200. The provision of the folded edge 21 can increase the contact area between the side heat insulating portion 20 and the bottom wall of the battery box 200, and can more effectively block the condensed water in the cavity from flowing to the heat insulating space K, thereby improving the insulation reliability of the battery pack 300.

[0067] In a further embodiment, referring to Figure 2 The folded edge 21 has an inclined surface 22, which is arranged toward the side where the top insulation part 10 is located, and the height of the inclined surface 22 in the Z direction decreases from one end close to the insulation space K to the other end opposite thereto.

[0068] When the Z direction is a vertical direction, the inclined surface 22 is located on the upper surface of the folded edge 21, and the inclined surface 22 extends downwardly from one end close to the heat insulating space K to the other end. In this way, the inclined surface 22 forms a slope to guide the condensed water to flow from the side heat insulating portion 20 to the side wall of the battery box 200, so that the condensed water is collected in the cavity, and the water blocking effect of the side heat insulating portion 20 can also be improved.

[0069] In some embodiments, reference Figure 2 The top insulation part 10 includes a first insulation layer 11 and a second insulation layer 12, and the first insulation layer 11 and the second insulation layer 12 are spaced apart in the Z direction to form an exhaust passage 13 connected to the insulation space K. The second insulation layer 12 is connected to the side insulation part 20 in one piece or in a separate piece, and the two together form the insulation space K.

[0070] It can be understood that when the Z direction is the vertical direction, the first insulation layer 11 is usually located above the second insulation layer 12, and the side insulation part 20 is located below the second insulation layer 12. The second insulation layer 12 and the side insulation part 20 together form an insulation space K, and the two can be integrally formed by injection molding or can be separately fixedly connected.

[0071] The first heat insulation layer 11 and the second heat insulation layer 12 are both made of heat insulation materials. The first heat insulation layer 11 and the second heat insulation layer 12 can be fixedly connected in a split manner or can be integrally formed.

[0072] An exhaust passage 13 is formed between the first insulation layer 11 and the second insulation layer 12 , and the exhaust passage 13 is connected to the insulation space K. Specifically, an air hole 14 may be provided on the second insulation layer 12 , and the exhaust passage 13 is connected to the insulation space K via the air hole 14 .

[0073] In this way, when the battery pack 300 located in the insulation space K experiences thermal runaway, the high-temperature smoke generated by the battery pack 300 can be discharged to the outside through the exhaust channel 13, thereby reducing the risk of explosion of the battery pack 1000.

[0074] In practical applications, an exhaust portion may be provided on the battery box 200, and the exhaust passage 13 may exhaust air to the exhaust portion to discharge high-temperature smoke to the outside of the battery box 200. An explosion-proof structure 400 such as an explosion-proof valve is usually provided at the exhaust portion of the battery box 200, and the explosion-proof structure 400 can be opened to release pressure when the pressure difference between the inside and outside of the battery box 200 is too large.

[0075] Figure 3 for Figure 1 A partial structural schematic diagram of a battery thermal insulation frame 100 is shown. Figure 4 for Figure 1 The battery heat insulation frame 100 shown is a schematic diagram of the state of being applied to a battery pack 1000.

[0076] Specifically in the embodiment, refer to Figure 3and Figure 4 The second heat insulating layer 12 is provided with an air hole 14 connecting the exhaust channel 13 and the heat insulating space K. The position of the air hole 14 corresponds to the position of the pressure relief portion 301 of the battery pack 300 .

[0077] The pressure relief portion 301 of the battery pack 300 usually corresponds to the pressure relief portion 301 of each battery cell in the battery pack 300. In the battery pack 300 located in the heat-insulating space K, the pressure relief portion 301 of each battery cell is located on the side of the battery cell facing the second heat-insulating layer 12. Usually, a vent hole 14 is provided corresponding to the pressure relief portion 301 of each battery cell, and the same vent hole 14 can be arranged opposite to the pressure relief portion 301 of one or more adjacent battery cells.

[0078] At this time, the air hole 14 corresponds to the position of the pressure relief part 301 of the battery cell group. When thermal runaway occurs in the battery pack 300, the high-temperature gas discharged through the pressure relief part 301 can be quickly discharged into the exhaust channel 13 through the air hole 14, which can reduce the temperature in the insulation space K and delay the spread of thermal runaway between different battery cells.

[0079] Figure 5 Schematic diagram of the structure of the first thermal insulation layer 11 in some embodiments.

[0080] In a further embodiment, in combination Figure 1 and Figure 5 The exhaust passage 13 has an exhaust port 13 a located at the edge of the top heat insulation portion 10 .

[0081] Specifically, the first heat insulating layer 11 may have an exhaust edge extending and protruding along the X direction, the exhaust edge forming an exhaust port 13 a, and the high temperature flue gas is guided to be discharged from the exhaust channel 13 through the exhaust port 13 a formed by the exhaust edge.

[0082] Figure 6 is a schematic structural diagram of a battery pack 1000 according to some embodiments, Figure 7 for Figure 6 The exploded view of the battery pack 1000 is shown. Figure 6 and Figure 7 It is understood that an explosion-proof structure 400 is provided on the side wall of the battery box 200 , and the exhaust edge extends toward the side where the explosion-proof structure 400 is located to guide the high-temperature flue gas to the explosion-proof structure 400 .

[0083] At this time, setting the exhaust port 13a of the exhaust channel 13 at the edge of the top insulation part 10 can guide the high-temperature flue gas to flow toward the side wall of the battery box 200, which helps to smoothly start the explosion-proof structure 400 and effectively prevent the battery pack 1000 from exploding.

[0084] Figure 8 for Figure 1The battery heat insulation frame 100 shown is a schematic structural diagram after removing the first heat insulation layer 11.

[0085] In some embodiments, reference Figure 8 , and combined with Figure 4 The second heat-insulating layer 12 is located on the inner wall of the heat-insulating space K and has a guide tube 15 protruding therefrom. The guide tube 15 is arranged opposite to the air hole 14 and is used to cover the pressure relief portion 301 of the battery pack 300 .

[0086] The guide tube 15 extends from the inner wall of the second heat insulating layer 12 to the pressure relief portion 301 of the battery pack 300 and covers the pressure relief portion 301. Generally, each guide tube 15 covers the pressure relief portion 301 of a battery cell, and the guide tube 15 can isolate the high-temperature flue gas from the heat insulating space K.

[0087] In this way, when the battery cell of the battery pack 300 has thermal runaway and the pressure relief part 301 thereof is opened, the high-temperature flue gas discharged from the pressure relief part 301 can quickly enter the exhaust passage 13 under the guidance of the guide tube 15, and the exhaust speed is fast. Moreover, under the restriction of the guide tube 15, the high-temperature flue gas discharged from the pressure relief part 301 will basically not flow to other battery cells, which can reduce the spread speed of thermal runaway between battery cells and improve the safety of the battery pack 300.

[0088] Fig. 9 Schematic diagram of the internal structure of the battery insulation frame 100 in some embodiments.

[0089] In some embodiments, reference Fig. 9 The top insulation part 10 also includes insulation support members 16. A plurality of insulation support members 16 are disposed in the exhaust passage 13 to support the inner walls of the first insulation layer 11 and the second insulation layer 12 on opposite sides in the Z direction.

[0090] The heat-insulating support member 16 and the first heat-insulating layer 11 and the second heat-insulating layer 12 can be separately provided and fixed by means of clamping, bonding, etc., or can be integrally formed by a process such as injection molding. The heat-insulating support member 16 is used to prop apart the first heat-insulating layer 11 and the second heat-insulating layer 12 to prevent the exhaust passage 13 from collapsing under the influence of factors such as high-temperature smoke and external force collision, so that the exhaust passage 13 can remain unobstructed.

[0091] Specifically, a plurality of heat insulating support members 16 are distributed in the exhaust passage 13 to uniformly support multiple locations of the exhaust passage 13. The plurality of heat insulating support members 16 may be distributed in rows and columns along the X direction and the Y direction.

[0092] Specifically, the insulation support member 16 can be an I-shape, with the larger cross-sectional areas at both ends contacting the first insulation layer 11 and the second insulation layer 12 respectively, and the smaller cross-sectional area in the middle is in the exhaust channel 13, which will not occupy too much space in the exhaust channel 13 and help improve the exhaust efficiency of the exhaust channel 13.

[0093] In some embodiments, reference Fig. 9 A plurality of air holes 14 are arranged at intervals along the Y direction, and a heat insulation support member 16 is arranged between adjacent air holes 14 along the Y direction.

[0094] like Figure 4 As shown, in some examples, the battery pack 300 includes a plurality of cells arranged side by side along the Y direction, and the pressure relief portions 301 of the cells in a row are arranged in sequence along the Y direction. At this time, the plurality of vent holes 14 are arranged to be spaced apart along the Y direction to adapt to the layout of the cells.

[0095] like Fig. 9 A heat insulating support 16 is provided between adjacent air holes 14 along the Y direction, and the heat insulating support 16 can support the exhaust passage 13 near the air hole 14, so that the high-temperature flue gas discharged from the air hole 14 flows more smoothly.

[0096] Fig.10 Schematic diagram of the structure of the first thermal insulation layer 11 in some embodiments.

[0097] In some embodiments, in combination Figure 6 , Figure 8 and Fig.10 The top heat insulating portion 10 has an exposure hole 17 that penetrates both the first heat insulating layer 11 and the second heat insulating layer 12 , and the exposure hole 17 is used to expose a partial area of ​​the battery pack 300 outside the pressure relief portion 301 .

[0098] It can be understood that the first thermal insulation layer 11 and the second thermal insulation layer 12 are both provided with an exposure hole 17, and the exposure hole 17 on the first thermal insulation layer 11 is arranged opposite to the exposure hole 17 on the second thermal insulation layer 12 to expose the battery pack 300. The exposure hole 17 can expose a portion of the battery pack 300 outside the pressure relief portion 301, which not only does not affect the normal pressure relief of the pressure relief portion 301, but also reduces the consumables of the first thermal insulation layer 11 and the second thermal insulation layer 12, and reduces the weight of the battery thermal insulation frame 100.

[0099] The exposure hole 17 may be a round hole, a square hole, or the like.

[0100] Fig.11 Schematic diagram of the internal structure of the battery insulation frame 100 in some embodiments.

[0101] Further to the embodiments, refer to Fig.11 , and combined with Fig.10A flanged tube 18 is formed on the inner wall of the first thermal insulation layer 11 and protrudes toward the second thermal insulation layer 12 and is arranged around the exposure hole 17. The flanged tube 18 is fitted and connected to the inner wall of the second thermal insulation layer 12 away from the insulation space K to isolate the exhaust channel 13 from the exposure hole 17.

[0102] The flanged tube 18 and the first thermal insulation layer 11 can be integrally provided, and are obtained by folding part of the first thermal insulation layer 11 inward. The flanged tube 18 fits the inner wall of the second thermal insulation layer 12, and the two can be bonded and connected. The two exposure holes 17 arranged opposite to each other on the first thermal insulation layer 11 and the second thermal insulation layer 12 form a group of exposed parts, and each group of exposed parts corresponds to a flanged tube 18.

[0103] At this time, the setting of the flanged tube 18 separates the exhaust passage 13 from the exposure hole 17, which can prevent the high-temperature smoke from leaking out from the exposure hole 17, and the exhaust is more reasonable.

[0104] In some embodiments, the battery heat insulation frame 100 is provided with a fixing portion 40 for fixing the battery box 200. The fixing portion 40 may be an adhesive fixing portion, a clamping fixing portion, a fastening fixing portion, etc. The specific structure thereof can be conventionally set by a person skilled in the art and is not limited here. The setting of the fixing portion 40 can enhance the safety and stability of the battery heat insulation frame 100 on the battery box 200 and effectively prevent the battery heat insulation frame 100 from falling off.

[0105] Fig.12 Schematic diagram of the fixing scheme of the battery box 200 and the battery insulation frame 100 in some embodiments.

[0106] Specifically in the embodiment, refer to Figure 2 and Figure 3 , combined with Fig.12 At least one end of the second heat insulation layer 12 in the Y direction is bent away from the heat insulation space K to form a first fixed flange 41 , and the fixing portion 40 includes the first fixed flange 41 .

[0107] The first fixed flange 41 is obtained by bending at least one end of the second heat insulation layer 12 in the Y direction, and is used to be fixedly connected to the side beam 201 of the battery box 200, and specifically can be fixedly connected to the upper surface of the side beam 201 of the battery box 200, and the fixing method can be but not limited to a fastening connection. The first fixed flange 41 extends longitudinally along the X direction, and the fixing area between the side beam 201 of the battery box 200 is large, which can stably connect the battery insulation frame 100 to the battery box 200.

[0108] Specifically in the embodiment, refer to Figure 2 and Figure 3 , combined with Fig.12 At least one end of the side insulation part 20 in the Y direction is bent away from the insulation space K to form a second fixed flange 42 , and the fixed part 40 includes the second fixed flange 42 .

[0109] The second fixed flange 42 is obtained by bending at least one end of the side heat insulation part 20 in the Y direction, and is used to be fixedly connected to the side beam 201 of the battery box 200, and specifically can be fixedly connected to the inner wall of the side beam 201 of the battery box 200 in the Y direction, and the fixing method can be but not limited to a fastening connection. The second fixed flange 42 extends longitudinally along the Z direction, and the fixing area between the side beam 201 of the battery box 200 is large, which can make the battery heat insulation frame 100 and the battery box 200 stably connected.

[0110] The first fixed flange 41 may be formed at one end or both ends of the second heat insulating layer 12 in the Y direction. Similarly, the second fixed flange 42 may be formed at one end or both ends of the side heat insulating portion 20 in the Y direction.

[0111] It is understandable that the solutions in the above multiple embodiments can be freely combined as long as they do not conflict.

[0112] In addition, the battery pack 1000 provided in the embodiment of the present application, referring to Figure 6 and Figure 7 , including a battery box 200, a battery pack 300 and a battery heat insulation frame 100 in any of the above embodiments, the battery heat insulation frame 100 is arranged in the battery box 200, and a heat insulation space K is separated and formed in the battery box 200, and the battery pack 300 is located in the heat insulation space K. It can be understood that the side heat insulation part 20 of the battery heat insulation frame 100 and the inner wall of the battery box 200 are spaced in the X direction to form the above cavity.

[0113] The battery pack 1000 includes all the beneficial effects of the above-mentioned embodiments, which will not be described in detail here.

[0114] In a specific embodiment, refer to Figure 6 and Figure 7 The battery box 200 includes a side beam 201 and a bottom plate 202 . The bottom plate 202 is arranged at one end of the side beam 201 . The side heat insulation part 20 abuts against the bottom plate 202 and forms a cavity between the side beam 201 . The battery pack 300 is supported on the bottom plate 202 .

[0115] The side beams 201 and the bottom plate 202 can form the box body of the battery box 200 together, the side beams 201 form the side walls of the battery box 200, and the bottom plate 202 forms the bottom wall of the battery box 200. The side beams 201 enclose a cavity with two ends open, the bottom plate 202 covers the bottom open end of the cavity, and the top open end of the cavity can be covered by the box cover of the battery box 200. A liquid cooling structure can be set on the bottom plate 202 to cool the battery pack 300. The base can also be directly used as a liquid cooling plate to improve the space utilization of the battery pack 1000.

[0116] Furthermore, an explosion-proof structure 400 is provided on the side beam 201, and the explosion-proof structure 400 is arranged opposite to the side heat insulation part 20. In this way, the cavity formed between the side heat insulation part 20 and the side beam 201 can be used to expose the explosion-proof structure 400, so that the high-temperature flue gas can flow to the explosion-proof structure 400 more easily, and the explosion-proof structure 400 can release pressure more reliably.

[0117] Furthermore, the top heat insulating portion 10 has an exhaust channel 13 connected to the heat insulating space K, and the exhaust port 13a of the exhaust channel 13 is located at the edge of the top heat insulating portion 10, and is used to exhaust to the side where the explosion-proof structure 400 is located. That is, the high-temperature flue gas discharged from the exhaust channel 13 will first reach the location of the explosion-proof structure 400, so that the explosion-proof structure 400 can more sensitively sense the pressure change in the battery pack 1000, and the pressure relief response of the explosion-proof structure 400 is more timely.

[0118] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0119] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery heat insulation frame, used for heat insulation between a battery box (200) and a battery group (300) of a battery pack (1000), characterized in that: The battery heat insulation frame (100) comprises: A top heat insulating portion (10) is arranged on one side of the battery pack along the Z direction; and Side heat insulating portions (20) are arranged at opposite sides of the top heat insulating portion (10) at intervals along the X direction, and are respectively connected to the same side of the top heat insulating portion (10) along the Z direction, so as to enclose together with the top heat insulating portion (10) to form a heat insulating space (K) for covering the battery pack (300); The side heat insulating portion (20) is configured to form a cavity with the inner wall of the battery box (200) along the X direction, and one end of the side heat insulating portion (20) away from the top heat insulating portion (10) along the X direction abuts against the inner wall of the battery box (200), so that the side heat insulating portion (20) can prevent condensed water in the battery box (200) from flowing from the cavity to the heat insulating space (K); The side heat insulating portion (20) is bent along the Z direction at a side away from the top heat insulating portion (10) to form a folded edge (21), the folded edge (21) extends along the X direction toward a side away from the heat insulating space (K), and the folded edge (21) is used to abut against an inner wall of the battery box (200); The top heat insulation part (10) comprises a first heat insulation layer (11) and a second heat insulation layer (12), wherein the first heat insulation layer (11) and the second heat insulation layer (12) are spaced apart in the Z direction to form an exhaust passage (13) communicating with the heat insulation space (K); the second heat insulation layer (12) is connected to the side heat insulation part (20) in an integral manner or in a separate manner, and the two together form the heat insulation space (K); The battery heat insulation frame (100) is provided with a fixing portion (40) for fixedly connecting with the battery box (200); the fixing portion (40) includes a first fixing flange (41) formed by bending on the second heat insulation layer (12), and / or includes a second fixing flange (42) formed by bending on the side heat insulation portion (20).

2. The battery insulation frame according to claim 1, characterized in that: The folded edge (21) has an inclined surface (22), and the inclined surface (22) is arranged toward the side where the top heat insulating portion (10) is located. The height of the inclined surface (22) in the Z direction decreases from one end close to the heat insulating space (K) to the other end opposite thereto.

3. The battery insulation frame according to claim 1, characterized in that: The second heat-insulating layer (12) is provided with an air hole (14) connecting the exhaust channel (13) and the heat-insulating space (K); the position of the air hole (14) corresponds to the position of the pressure relief portion (301) of the battery pack (300); The exhaust passage (13) has an exhaust port (13a) located at the edge of the top heat insulating portion (10).

4. The battery insulation frame according to claim 3, characterized in that: The second heat-insulating layer (12) is provided with a guide tube (15) protruding on the inner wall of the heat-insulating space (K); the guide tube (15) is arranged opposite to the air hole (14) and is used to cover the pressure relief part (301) of the battery pack (300).

5. The battery insulation frame according to claim 3, characterized in that: The top heat insulation part (10) further comprises a heat insulation support member (16), wherein a plurality of the heat insulation support members (16) are arranged in the exhaust passage (13) and are used to support the inner walls of the first heat insulation layer (11) and the second heat insulation layer (12) on two opposite sides in the Z direction; The plurality of air holes (14) are arranged at intervals along the Y direction, and the heat insulation support member (16) is arranged between the air holes (14) adjacent to each other along the Y direction.

6. The battery insulation frame according to claim 5, characterized in that: The plurality of heat-insulating support members (16) are distributed in rows and columns along the X direction and the Y direction.

7. The battery insulation frame according to claim 3, characterized in that: The top heat insulating portion (10) has an exposure hole (17) that penetrates both the first heat insulating layer (11) and the second heat insulating layer (12), and the exposure hole (17) is used to expose a partial area of ​​the battery pack (300) located outside the pressure relief portion (301); A flanged tube (18) is formed on the inner wall of the first thermal insulation layer (11) and protrudes toward the second thermal insulation layer (12) and is arranged around the exposure hole (17). The flanged tube (18) is closely connected to the inner wall of the second thermal insulation layer (12) facing away from the thermal insulation space (K) to isolate the exhaust passage (13) from the exposure hole (17).

8. The battery insulation frame according to claim 1, characterized in that: At least one end of the second heat-insulating layer (12) in the Y direction is bent away from the heat-insulating space (K) to form the first fixed flange (41); The side heat insulating portion (20) is bent at at least one end in the Y direction away from the heat insulating space (K) to form the second fixed flange (42).

9. A battery pack, characterized in that: The battery pack (1000) comprises: Battery box (200); a battery pack (300); and, The battery heat insulation frame (100) according to any one of claims 1 to 8, wherein the battery heat insulation frame (100) is arranged in the battery box (200), and the heat insulation space (K) is separated and formed in the battery box (200), and the battery pack (300) is located in the heat insulation space (K).

10. The battery pack according to claim 9, characterized in that: The battery box (200) comprises a side beam (201) and a bottom plate (202), the bottom plate (202) being arranged at one end of the side beam (201), the side heat insulation part (20) being in contact with the bottom plate (202), and forming the cavity between the side beam (201), and the battery pack (300) being supported by the bottom plate (202); An explosion-proof structure (400) is provided on the side beam (201), and the explosion-proof structure (400) is arranged opposite to the side heat insulation part (20); The top heat insulation part (10) has an exhaust passage (13) connected to the heat insulation space (K); an exhaust port (13a) of the exhaust passage (13) is located at the edge of the top heat insulation part (10) and is used to exhaust air to the side where the explosion-proof structure (400) is located.

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