Heat insulation pad, battery module, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a heat insulation pad, a battery module, a battery pack and electric equipment, and relates to the technical field of batteries. The heat insulation pad comprises a heat insulation part, a shielding part and a positioning structure, wherein the heat insulation part is arranged in a gap between two adjacent battery cells; the shielding part is connected with the heat insulation part, and the shielding part is used for shielding the gap; the positioning structure is arranged on the shielding part and used for being matched with the collector plate for positioning. And by arranging the shielding part, welding slag can be prevented from falling between two adjacent battery cells when the collector plate is welded. By arranging the positioning structure, the collector plate can be positioned, and the mounting time and the welding time of the collector plate are shortened. In addition, the positioning structure can also prevent the collector plate from moving during welding, and the welding quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a heat insulating pad, a battery module, a battery pack and electrical equipment. Background Art

[0002] The battery collector plate is a metal plate whose main function is to collect the electric energy generated by the battery onto the metal plate and then transmit it to other devices through wires. In the battery pack, the battery collector plate ensures that there is a good current path between the positive and negative electrodes of each battery, thereby ensuring the normal operation of the entire battery pack. At the same time, the battery collector plate can also prevent the battery from polarizing during operation, making the battery life longer.

[0003] However, the current collecting plate installation efficiency of the existing battery module is low, which increases the welding time of the current collecting plate and thus increases the assembly time of the battery module. Utility Model Content

[0004] The utility model provides a heat insulating pad, a battery module, a battery pack and electrical equipment, which can shield the gap between battery cells to prevent welding slag from falling in, and can position the current collecting plate, thereby reducing the assembly time of the battery module.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The embodiment of the utility model provides a thermal insulation pad, which includes:

[0007] A heat insulating portion, the heat insulating portion being arranged in a gap between two adjacent battery cells;

[0008] a shielding portion, the shielding portion being connected to the heat insulating portion and being used to shield the gap;

[0009] A positioning structure, wherein the positioning structure is arranged on the shielding portion, and the positioning structure is used for cooperating with the current collecting plate for positioning.

[0010] In an optional embodiment, one side of the shielding portion is connected to the heat insulating portion, and the positioning structure is protruded on a side of the shielding portion away from the heat insulating portion.

[0011] In an optional embodiment, the shielding portion and the heat insulating portion are distributed perpendicularly, the width of the shielding portion is greater than the thickness of the heat insulating portion, and the shielding portion and the heat insulating portion form a "T"-shaped structure.

[0012] In an optional embodiment, the positioning structure is provided at both ends of the shielding portion.

[0013] In an optional embodiment, the positioning structure includes a first positioning pin and a second positioning pin, the first positioning pin and the second positioning pin are arranged at an interval, and the first positioning pin and the second positioning pin are both used for cooperating with the same collecting plate for positioning.

[0014] In an optional embodiment, the first positioning pin and / or the second positioning pin is cylindrical; the collecting plate is provided with a positioning hole used in conjunction with the first positioning pin and / or the second positioning pin, so that the positioning hole cooperates with the positioning structure for positioning.

[0015] In an optional embodiment, the thermal insulation pad further includes a snap-fit ​​structure, which is disposed at two ends of the shielding portion and is used for snapping with the current collecting plate.

[0016] In an optional embodiment, the snap-fit ​​structure includes a body and a barb, the body is connected to the barb, the body is vertically arranged on the shielding portion, the barb faces the positioning structure, the body is used to abut against the side edge of the current collecting plate; the barb is used to abut against the upper surface of the current collecting plate for a limit position.

[0017] In an optional embodiment, the number of the snap structures is two, namely a first snap member and a second snap member, the first snap member and the second snap member are distributed on both sides of the positioning structure, and are used to abut and limit the two side edges opposite to the collecting plate; the first snap member and the second snap member are also used together to abut and limit the upper surface of the collecting plate.

[0018] In an optional embodiment, the thermal insulation pad further includes a position limiting mounting portion, the position limiting mounting portion is connected to an end portion of the shielding portion, and the position limiting mounting portion is perpendicular to the thermal insulation portion.

[0019] In an optional embodiment, a through hole is opened in the middle of the heat insulation part, and the through hole is used for placing the heat insulation material.

[0020] An embodiment of the utility model also provides a battery module, comprising a plurality of the battery cells, a plurality of the current collecting plates and a plurality of the thermal insulation pads described in any of the above embodiments, wherein the plurality of the battery cells are arranged side by side, and at least one thermal insulation pad is arranged between two adjacent battery cells; each of the current collecting plates is connected to the pole ears of two adjacent battery cells, and the current collecting plates cooperate with the positioning structure for positioning.

[0021] An embodiment of the utility model further provides a battery pack, comprising a shell and a plurality of battery modules as described in any of the above embodiments, wherein the plurality of battery modules are arranged in the shell, and the plurality of battery modules are connected in series and / or in parallel with each other.

[0022] An embodiment of the utility model further provides an electrical device, comprising the battery pack described in the above embodiment.

[0023] The beneficial effects of the thermal insulation pad, battery module, battery pack and electrical equipment of the embodiment of the utility model include:

[0024] The thermal insulation pad includes a thermal insulation portion, a shielding portion and a positioning structure. The thermal insulation portion is used to be arranged in the gap between two adjacent battery cells; the shielding portion is connected to the thermal insulation portion, and the shielding portion is used to shield the gap; the positioning structure is arranged on the shielding portion, and the positioning structure is used to cooperate with the current collector for positioning. By setting the shielding portion, when welding the current collector, welding slag can be prevented from falling between two adjacent battery cells. By setting the positioning structure, the current collector can be positioned, reducing the installation time and welding time of the current collector. In addition, the positioning structure can also prevent the current collector from moving during welding, thereby improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a battery pack provided in an embodiment of the present utility model;

[0027] Figure 2 A schematic diagram of a battery module provided in an embodiment of the present utility model;

[0028] Figure 3 An exploded schematic diagram of a battery module provided in an embodiment of the utility model;

[0029] Figure 4 A schematic diagram of a first type of thermal insulation pad provided in an embodiment of the present utility model;

[0030] Figure 5 This is a schematic diagram of a second type of thermal insulation pad provided in an embodiment of the present utility model.

[0031] Icons: 1-battery pack; 1000-battery module; 100-insulation pad; 110-insulation part; 111-through hole; 120-shielding part; 130-positioning structure; 131-first positioning pin; 132-second positioning pin; 140-buckle structure; 141-first buckle; 142-second buckle; 143-body; 144-hook; 150-limiting mounting part; 200-battery cell; 300-collector plate; 310-positioning hole; 400-end plate; 500-bus; 2000-housing. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0036] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0037] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0038] The battery collector plate is a metal plate whose main function is to concentrate the electrical energy generated in the battery onto the metal plate and then transmit it to other devices through wires. In the battery pack, the battery collector plate ensures that there is a good current path between the positive and negative electrodes of each battery, thereby ensuring the normal operation of the entire battery pack. At the same time, the battery collector plate can also prevent the battery from polarizing during operation, making the battery life longer. However, the installation efficiency of the current collector plate of the existing battery module is low, which increases the welding time of the current collector plate, thereby increasing the assembly time of the battery module.

[0039] In addition, after an internal or external short circuit occurs in a power battery, the battery will release a large amount of heat in a short period of time, and the temperature will rise sharply, leading to thermal runaway. Through heat diffusion, a single thermal runaway battery cell will cause thermal runaway of adjacent batteries through heat conduction and flames, causing thermal runaway of the entire battery module battery pack, thereby causing safety incidents such as fire and explosion. By setting a thermal insulation pad between adjacent batteries, when one of the batteries has thermal runaway, its heat can be blocked from being transferred to the adjacent batteries to prevent heat diffusion, thereby avoiding the domino effect of thermal runaway of the battery cells and greatly improving the safety performance of the battery. However, after most of the existing thermal insulation pads are installed, there is a certain gap between the batteries. When welding the collector plate, the welding slag may fall into the gap between the batteries, causing the welding slag to pierce the surface of the battery cell after the battery cell expands, causing the risk of short circuit. In addition, the existing thermal insulation pads cannot locate the collector plate, which increases the assembly time of the battery module.

[0040] Based on this, see Figure 1 , Figure 2 and Figure 3 The thermal insulation pad 100, battery module 1000, battery pack 1 and electrical equipment provided in the embodiment of the utility model can effectively solve the above-mentioned technical problems. The thermal insulation pad 100 can block the gap between the battery cells 200 and the battery cells 200 to prevent welding slag from falling in, and can position the collector plate 300, reducing the assembly time of the battery module 1000. The battery module 1000, battery pack 1 and electrical equipment having the thermal insulation pad 100 also have the same functions as the thermal insulation pad 100.

[0041] The power-consuming device in this embodiment includes a device to be consumed and a battery pack 1 with the thermal insulation pad 100. The battery pack 1 provides power to the device to be consumed to realize various functions of the device to be consumed. The device to be consumed can be an electric vehicle. The battery pack 1 is arranged in the body of the electric vehicle. The battery pack 1 provides power to the body to realize various functions of the body. The device to be consumed can also be other power-consuming devices such as a mobile power supply and a smart home, which are not limited here.

[0042] Specifically, see Figure 1 , Figure 1This is a schematic diagram of a battery pack 1 provided in an embodiment of the utility model. The battery pack 1 provided in this embodiment includes a housing 2000 and a plurality of battery modules 1000. The plurality of battery modules 1000 are all arranged in the housing 2000, and the plurality of battery modules 1000 are connected in series and / or in parallel with each other. That is, the plurality of battery modules 1000 can all be connected in series only, or can all be connected in parallel only. Of course, the plurality of battery modules 1000 can also be partially connected in series and partially in parallel. The connection method between the plurality of battery modules 1000 can be determined according to the actual power demand and is not limited here. In addition, the battery pack 1 may also include structural components such as a BMS (battery management system), an electrical system, and a thermal management system to realize the various functions of the battery pack 1.

[0043] The structure of the battery module 1000 is described in detail below.

[0044] The current collecting plate 300 needs to be fixed in position during welding to ensure the welding quality of the current collecting plate 300. However, each welding of a current collecting plate 300 requires an operator to fix the current collecting plate 300 to the welding position, which consumes a lot of installation and welding time. Figure 2 A schematic diagram of a battery module 1000 provided in an embodiment of the present utility model; Figure 3 FIG. 1 is an exploded view of a battery module 1000 provided in an embodiment of the present invention. Figure 2 and Figure 3 In order to reduce the time of welding the current collector 300 and reduce the assembly time of the battery module 1000, the battery module 1000 provided in this embodiment includes a plurality of battery cells 200, a plurality of current collectors 300 and a plurality of thermal insulation pads 100. The plurality of battery cells 200 are arranged side by side, and at least one thermal insulation pad 100 is arranged between two adjacent battery cells 200; each current collector 300 connects the tabs of two adjacent battery cells 200, and the current collector 300 cooperates with the positioning structure 130 for positioning. A current collector 300 connects the same type of tabs of two adjacent battery cells 200, such as connecting the positive tabs of two adjacent battery cells 200 or connecting the negative tabs of two adjacent battery cells 200. By coordinating the positioning of the current collector 300 with the positioning structure 130 on the thermal insulation pad 100, the installation time of the current collector 300 can be greatly shortened, thereby reducing the welding time, reducing the assembly time of the battery module 1000, and speeding up the production process.

[0045] Of course, two thermal insulation pads 100 may also be arranged between two adjacent battery cells 200 . The two thermal insulation pads 100 are “L”-shaped and together form a “T”-shaped structure, which together play the role of shielding the gaps between the battery cells 200 and insulating the adjacent battery cells 200 .

[0046] The battery module 1000 may further include an end plate 400 and a bus bar 500 . The end plate 400 wraps the plurality of battery cells 200 . The bus bar 500 is electrically connected to each current collecting plate 300 to achieve electrical aggregation.

[0047] The above-mentioned “the current collecting plate 300 cooperates with the positioning structure 130 for positioning” specifically means that the current collecting plate 300 is provided with a positioning hole 310, and the positioning hole 310 is used to cooperate with the positioning structure 130 for positioning. Of course, the current collecting plate 300 and the thermal insulation pad 100 can also be positioned and matched using other structures, which is not limited here.

[0048] The battery cell 200 is one of the core components of an electric vehicle, and it is composed of many battery cells. Heat is generated during the battery charging and discharging process. If the temperature inside the battery cell 200 is too high, it will have a great impact on the life and performance of the battery cell. Therefore, a heat insulating material is needed between the battery cells 200 to prevent heat transfer and ensure that the temperature inside the battery cell 200 does not exceed the safe range. Common insulation pads 100 use silicone insulation pads 100, aerogel insulation pads 100, plastic insulation pads 100, and glass fiber insulation pads 100. Silicone insulation pads 100 are a common insulation material for battery cells 200. They have excellent insulation and mechanical properties and can isolate the battery cells 200 well. At the same time, silicone insulation pads 100 have certain elasticity and flexibility, and can adapt to the deformation of the battery cell 200. Plastic insulation pads 100 usually use polyimide (PI) as a substrate, which has good mechanical properties and high temperature stability. Fiberglass insulation mat 100 is a composite material composed of glass fiber and phenolic resin, which is characterized by good thermal insulation, high mechanical properties and good stability.

[0049] However, the size of the insulation pad 100 is generally smaller than the size of the large surface of the battery cell 200, so that there is a certain gap between the battery cells 200. When the battery module 1000 is welded to the collector plate 300, the welding slag generated during the welding process may splash around and enter the gap between the battery cells 200, which is not easy to be found. During the subsequent use of the battery module 1000, due to the influence of the expansion force of the battery cell 200, the welding slag may pierce the surface of the battery cell 200, causing the risk of short circuit.

[0050] To avoid the above risks, please refer to Figure 4 and Figure 5 , and combined with Figure 3 , Figure 4 A schematic diagram of a first type of thermal insulation pad 100 provided in an embodiment of the present utility model; Figure 5This is a schematic diagram of a second type of thermal insulation pad 100 provided in an embodiment of the utility model. The improved thermal insulation pad 100 in this embodiment includes a thermal insulation portion 110 and a shielding portion 120. The thermal insulation portion 110 is used to be arranged in the gap between two adjacent battery cells 200; the shielding portion 120 is connected to the thermal insulation portion 110, and the shielding portion 120 is used to shield the gap between two adjacent battery cells 200. The thermal insulation portion 110 is used to separate two adjacent battery cells 200, and the shielding portion 120 is respectively in contact with at least part of the top of the two adjacent battery cells 200. By setting the shielding portion 120, when welding the current collector 300, welding slag can be prevented from falling between the two adjacent battery cells 200. Of course, the shielding portion 120 may not be in contact with the top of the two adjacent battery cells 200, but the shielding portion 120 needs to shield the gap between the two adjacent battery cells 200 to prevent welding slag from falling between the battery cells 200 and affecting the normal use of the subsequent battery cells 200.

[0051] Specifically, the shielding portion 120 is vertically distributed with the heat insulating portion 110, and the shielding portion 120 and the heat insulating portion 110 form a "T"-shaped structure. In order to shield the gaps between the battery cells 200 and prevent welding slag from falling between the battery cells 200, the width of the shielding portion 120 in this embodiment is greater than the thickness of the heat insulating portion 110. The width of the shielding portion 120 is the straight length of the shielding portion 120 along the spacing direction of the multiple battery cells 200, and the thickness of the heat insulating portion 110 is the straight length of the heat insulating portion 110 along the spacing direction of the multiple battery cells 200, that is, the distance between the two surfaces of the heat insulating portion 110 in contact with two adjacent battery cells 200.

[0052] The battery collector plate 300 is a device that concentrates the current generated in the battery cell to the output port. When the battery is working, the electric energy generated by the battery needs to be output to the external circuit, and the battery collector plate 300, as a connection between the battery and the external circuit, plays a very important role, which can effectively concentrate the current in the battery so that it can be output to the external circuit. In order to reduce the installation and welding time of the collector plate 300, the thermal insulation pad 100 in this embodiment also includes a positioning structure 130, which is arranged on the shielding part 120, and the positioning structure 130 is used to cooperate with the collector plate 300 for positioning. Specifically, one side of the shielding part 120 is connected to the thermal insulation part 110, and the positioning structure 130 is convexly arranged on the side of the shielding part 120 away from the thermal insulation part 110. The positioning structure 130 is used to limit the movement of the collector plate 300 in the X direction and the Y direction; the X direction is the direction in which the multiple battery cells 200 are arranged; the Y direction is perpendicular to the X direction. By providing the positioning structure 130, the current collecting plate 300 can be positioned, reducing the installation time and welding time of the current collecting plate 300. In addition, the positioning structure 130 can also prevent the current collecting plate 300 from moving during welding, thereby improving the welding quality.

[0053] The battery cell 200 includes a positive electrode ear and a negative electrode ear. In order to enable the thermal insulation pad 100 to simultaneously cooperate with the two current collecting plates 300 for positioning the positive electrode ear end and the negative electrode ear end, please continue to refer to Figure 3 and Figure 4 , and combined with Figure 2 , both ends of the shielding portion 120 in this embodiment are provided with a positioning structure 130. Specifically, the positioning structure 130 includes a first positioning pin 131 and a second positioning pin 132, the first positioning pin 131 and the second positioning pin 132 are arranged at intervals, and the first positioning pin 131 and the second positioning pin 132 are both used to cooperate with the same current collecting plate 300 for positioning. Two positioning holes 310 are provided on the current collecting plate 300, and the positions of the two positioning holes 310 correspond to the first positioning pin 131 and the second positioning pin 132, respectively. When the current collecting plate 300 needs to be welded, the two positioning holes 310 of the current collecting plate 300 are first aligned with the first positioning pin 131 and the second positioning pin 132, respectively, and then the current collecting plate 300 is inserted, and the current collecting plate 300 is positioned in cooperation with the thermal insulation pad 100, and finally the current collecting plate 300 is directly welded with the pole ears of two adjacent battery cells 200. In addition, the positioning structure 130 may also include only one positioning pin, or include three positioning pins or other different numbers of positioning pins, which are not limited here. Correspondingly, an equal number of positioning holes 310 need to be provided on the current collecting plate 300 to achieve matching positioning.

[0054] The first locating pin 131 and / or the second locating pin 132 are cylindrical. The first locating pin 131 and the second locating pin 132 can both be cylindrical, and correspondingly, the locating hole 310 is circular. Of course, the first locating pin 131 and the second locating pin 132 can also be other shapes, such as a rectangular parallelepiped, etc., and correspondingly, the locating hole 310 is designed to be square or rectangular. The shapes of the first locating pin 131, the second locating pin 132 and the locating hole 310 are not limited here, as long as they can match each other. In addition, the shapes of the first locating pin 131 and the second locating pin 132 can be the same or different, but the shapes of the locating holes 310 corresponding to the first locating pin 131 and the second locating pin 132 must match the first locating pin 131 and the second locating pin 132, respectively.

[0055] See also Figure 4 and Figure 5 , and combined with Figure 3In order to prevent the current collecting plate 300 from moving up and down during the welding process, the heat insulating pad 100 in this embodiment further includes a buckle structure 140, which is used to buckle with the current collecting plate 300, that is, to abut against the side and upper surface of the current collecting plate 300. The buckle structure 140 includes a body 143 and a barb 144, the body 143 is connected to the barb 144, the body 143 is vertically arranged on the shielding portion 120, the barb 144 faces the positioning structure 130, the body 143 is used to abut against the side of the current collecting plate 300, and the barb 144 is used to abut against the upper surface of the current collecting plate 300. The buckle structure 140 is provided with the barb 144 to prevent the current collecting plate 300 from moving up and down along the Z direction.

[0056] Specifically, the number of the snap structures 140 in this embodiment is two, namely, the first snap member 141 and the second snap member 142. The first snap member 141 and the second snap member 142 are distributed on both sides of the positioning structure 130 and are used to abut against and limit the two sides opposite to the current collecting plate 300; the first snap member 141 and the second snap member 142 are also used to abut against and limit the upper surface of the current collecting plate 300. The first snap member 141 and the second snap member 142 both include a body 143 and a barb 144. That is, the current collecting plate 300 is arranged between the first snap member 141 and the second snap member 142, one side of the current collecting plate 300 abuts against and limits the body 143 of the first snap member 141, and the other side of the current collecting plate 300 abuts against and limits the body 143 of the second snap member 142, so as to prevent the current collecting plate 300 from moving along the Y direction. The upper surface of the current collecting plate 300 contacts the barbs 144 of the first and second latches 141 and 142 to prevent the current collecting plate 300 from moving along the Z direction.

[0057] Of course, the buckle structure 140 may also include only one, three, four or other buckle parts. The number of buckle parts can be determined according to specific circumstances and is not limited here.

[0058] In order to achieve the abutment and limiting of the current collecting plates 300 at the positive and negative terminals of the battery cell 200, both ends of the shielding portion 120 in this embodiment are provided with snap structures 140. Of course, only one end may be provided, depending on the specific situation, and is not limited here.

[0059] To improve the thermal insulation effect of the thermal insulation pad 100, please refer to Figure 4 and Figure 5 In this embodiment, a through hole 111 is provided in the middle of the heat insulating portion 110, and the through hole 111 is used to place a heat insulating material. The heat insulating material may be a heat insulating material such as aerogel, which is not limited here.

[0060] See also Figure 5In order to make the installation and cooperation between the thermal insulation pad 100 and the battery cell 200 more stable, the thermal insulation pad 100 in this embodiment also includes a limit installation part 150, which is connected to the end of the shielding part 120, and the limit installation part 150 is perpendicular to the thermal insulation part 110. The limit installation part 150 and the shielding part 120 together form a frame for fixing the limit battery cell 200. The limit installation part 150 contacts part of the side edges of two adjacent battery cells 200 to fix and limit the two adjacent battery cells 200.

[0061] According to a thermal insulation pad 100 provided in this embodiment, its working principle is as follows:

[0062] By arranging the thermal insulation pad 100 between the battery cells 200, the current collector 300 can be positioned with the positioning structure 130 of the thermal insulation pad 100 before welding, thereby reducing the installation and welding time of the current collector 300. The shielding portion 120 of the thermal insulation pad 100 shields the gap between the battery cells 200, thereby preventing welding slag from falling between the battery cells 200 when welding the current collector 300, thereby affecting the subsequent use of the battery cells 200. The thermal insulation portion 110 of the thermal insulation pad 100 can insulate two adjacent battery cells 200 to prevent heat transfer.

[0063] In summary, the thermal insulation pad 100 includes a thermal insulation portion 110, a shielding portion 120 and a positioning structure 130. The thermal insulation portion 110 is used to be arranged in the gap between two adjacent battery cells 200; the shielding portion 120 is connected to the thermal insulation portion 110, and the shielding portion 120 is used to shield the gap between two adjacent battery cells 200; the positioning structure 130 is arranged on the shielding portion 120, and the positioning structure 130 is used to cooperate with the current collector 300 for positioning. By setting the shielding portion 120, when welding the current collector 300, welding slag can be prevented from falling between two adjacent battery cells 200. By setting the positioning structure 130, the current collector 300 can be positioned, reducing the installation time and welding time of the current collector 300. In addition, the positioning structure 130 can also prevent the current collector 300 from moving during welding, thereby improving the welding quality.

[0064] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A thermal insulation pad, characterized in that: include: A heat insulating portion (110), the heat insulating portion (110) being used to be arranged in a gap between two adjacent battery cells (200); a shielding portion (120), the shielding portion (120) being connected to the heat insulating portion (110), and the shielding portion (120) being used to shield the gap; A positioning structure (130), wherein the positioning structure (130) is arranged on the shielding portion (120), and the positioning structure (130) is used to cooperate with the current collecting plate (300) for positioning.

2. The thermal insulation pad according to claim 1, characterized in that: One side of the shielding portion (120) is connected to the heat insulating portion (110), and the positioning structure (130) is protrudingly arranged on a side of the shielding portion (120) away from the heat insulating portion (110).

3. The thermal insulation pad according to claim 1, characterized in that: The shielding portion (120) is distributed perpendicularly to the heat insulating portion (110); the width of the shielding portion (120) is greater than the thickness of the heat insulating portion (110); and the shielding portion (120) and the heat insulating portion (110) form a "T"-shaped structure.

4. The thermal insulation pad according to claim 1, characterized in that: The positioning structures (130) are provided at both ends of the shielding portion (120).

5. The thermal insulation pad according to claim 1, characterized in that: The positioning structure (130) comprises a first positioning pin (131) and a second positioning pin (132), wherein the first positioning pin (131) and the second positioning pin (132) are arranged at intervals, and the first positioning pin (131) and the second positioning pin (132) are both used for cooperating with the same current collecting plate (300) for positioning.

6. The thermal insulation pad according to claim 5, characterized in that: The first positioning pin (131) and / or the second positioning pin (132) are cylindrical; the current collecting plate (300) is provided with a positioning hole (310) for use with the first positioning pin (131) and / or the second positioning pin (132), so that the positioning hole (310) cooperates with the positioning structure (130) for positioning.

7. The thermal insulation pad according to claim 1, characterized in that: The thermal insulation pad (100) further comprises a buckle structure (140), wherein the buckle structure (140) is arranged at two ends of the shielding portion (120) and is used for buckling with the current collecting plate (300); The snap-fit ​​structure (140) comprises a body (143) and a barb (144); the body (143) is connected to the barb (144); the body (143) is vertically arranged on the shielding portion (120); the barb (144) faces the positioning structure (130); the body (143) is used to abut against the side edge of the current collecting plate (300) to limit the position; and the barb (144) is used to abut against the upper surface of the current collecting plate (300) to limit the position.

8. A battery module, characterized in that: It comprises a plurality of the battery cells (200), a plurality of the current collecting plates (300) and a plurality of the thermal insulation pads (100) according to any one of claims 1 to 7, wherein the plurality of the battery cells (200) are arranged side by side, and at least one thermal insulation pad (100) is arranged between two adjacent battery cells (200); each of the current collecting plates (300) connects two adjacent battery cells (200), and the current collecting plates (300) cooperate with the positioning structure (130) for positioning.

9. A battery pack, characterized in that: It comprises a shell (2000) and a plurality of battery modules (1000) as claimed in claim 8, wherein the plurality of battery modules (1000) are arranged in the shell (2000), and the plurality of battery modules (1000) are connected in series and / or in parallel.

10. An electrical device, characterized in that: Comprising the battery pack (1) as claimed in claim 9.

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