Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and relates to the technical field of power batteries, and the battery pack comprises a box body and a plurality of battery packs; the plurality of battery packs are mounted in the box body; the battery pack comprises at least one battery row; the battery row comprises a plurality of battery cells arranged in an array along a first direction; the battery cell is provided with two first side surfaces and two second side surfaces; the two first side surfaces are oppositely arranged in a first direction; the two second side faces are oppositely arranged in the second direction perpendicular to the first direction. The area of the first side is larger than that of the second side; a first heat insulation layer is arranged between the first side surfaces of the adjacent battery cells; the first heat insulation layer is a silicon foam heat insulation layer; an insulating plate is arranged between the first side surface at the end part of the battery pack and the box body; a second heat insulation layer is arranged between the insulation plate and the first side face. The battery pack designed by the utility model has better economical efficiency and thermal insulation performance.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to battery packs and electrical equipment. Background Technology

[0002] With the deepening of the national energy conservation and emission reduction efforts, the new energy vehicle industry is developing rapidly. The power source of new energy vehicles is mainly a power battery system based on lithium-ion batteries. With the continuous development of power battery systems, CTP (Cell-to-Pack) technology is becoming increasingly popular. CTP technology eliminates the intermediate module link in traditional battery packs, directly integrating the cells into the battery pack. This makes the battery pack structure more compact, significantly improving the space utilization and energy density of the battery pack, while also reducing the number of components, simplifying the manufacturing process, and lowering production costs.

[0003] However, after the battery module is removed, the battery cells directly bear mechanical stress, which requires high structural strength and also poses a challenge to safety. With the cells densely packed, if one cell experiences thermal runaway, it can easily trigger a chain reaction, leading to thermal runaway of the entire battery pack, requiring more stringent safety protection designs. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery pack and electrical equipment to solve the technical problems of poor safety protection design between internal cells of existing battery packs and lack of cost advantage.

[0005] To achieve the above-mentioned technical objectives, this application provides a battery pack, including a housing and several battery packs;

[0006] Several of the battery packs are installed in the housing;

[0007] The battery pack includes at least one battery pack;

[0008] The battery pack includes a plurality of battery cells arranged in an array along a first direction;

[0009] The battery cell has two first sides and two second sides;

[0010] The two first sides are arranged opposite to each other in the first direction;

[0011] The two second sides are arranged opposite each other in a second direction perpendicular to the first direction;

[0012] The area of ​​the first side is greater than the area of ​​the second side;

[0013] A first heat insulation layer is provided between the first sides of adjacent battery cells;

[0014] The first insulation layer is a silicone foam insulation layer;

[0015] An insulating plate is provided between the first side located at the end of the battery pack and the housing;

[0016] A second heat insulation layer is provided between the insulating plate and the first side surface.

[0017] Furthermore, the battery pack includes at least two battery banks;

[0018] At least two of the battery packs are arranged in an array along the second direction;

[0019] The second side is folded upwards from the bottom with an insulating film edging;

[0020] A first gap is formed between adjacent cells in the second direction at the position from the top of the cell to the edge of the insulating film;

[0021] A filling layer is provided in the first gap.

[0022] Furthermore, the height of the filler layer extends from the top of the battery cell to the edge of the insulating film;

[0023] The thickness of the filler layer is greater than or equal to twice the thickness of the insulating film edging.

[0024] Furthermore, the filling layers disposed between adjacent battery packs are sequentially connected to form filling strip layers;

[0025] One side of the filler strip layer is provided with a second adhesive layer for bonding to the second side.

[0026] Furthermore, the plurality of filling layers are spaced apart in the first direction;

[0027] One side of the filler layer is provided with a second adhesive layer for bonding to the second side.

[0028] Furthermore, it also includes carrier tape;

[0029] The filling layers disposed between adjacent battery packs are sequentially spaced on the carrier tape, and the spacing between adjacent filling layers in the first direction is the same as the spacing between adjacent battery cells;

[0030] The carrier tape has a second adhesive layer on the side facing away from the filler layer for bonding to the second side.

[0031] Furthermore, the side of the first heat insulation layer in the second direction is located within the chamfer of the edge of the battery cell, and forms a receiving space with the chamfer of the edge of the battery cell;

[0032] The receiving space can be used to receive the wrinkled carrier tape.

[0033] Furthermore, the filling layer is a silicone foam layer.

[0034] Furthermore, the initial thickness of the filler layer is greater than or equal to the extruded thickness of the first heat insulation layer, and less than or equal to the initial thickness of the first heat insulation layer;

[0035] The initial thickness of the first insulation layer is twice the extruded thickness.

[0036] This application also discloses an electrical device, including the device body and the battery pack;

[0037] The battery pack is installed on the main body of the device and is used to supply power to the main body of the device.

[0038] As can be seen from the above technical solutions, the battery pack and electrical equipment designed in this application have the following beneficial effects:

[0039] 1. A silicone foam material, which is cheaper than aerogel material, is used to make the first heat insulation layer between the first side (large surface) of the battery cells. This not only achieves heat insulation and improves the structural strength between the battery cells, but also effectively reduces costs, thus creating a cost advantage.

[0040] 2. A second heat insulation layer is added between the first side of the end cell and the insulation plate. This not only meets the insulation requirements but also has good heat insulation and heat preservation functions, ensuring the charging rate of the battery pack in low-temperature environments and that it can be fully charged. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a first partial perspective view of the battery pack provided in this application;

[0043] Figure 2 A top view showing the internal battery pack of the battery pack provided in this application;

[0044] Figure 3 This is an exploded schematic diagram of the battery pack provided in this application.

[0045] Figure 4 This is a second partial perspective view of the battery pack provided in this application;

[0046] Figure 5 This is a third partial perspective view of the battery pack provided in this application;

[0047] Figure 6 This is a fourth partial perspective view of the battery pack provided in this application;

[0048] Figure 7 A perspective view of the battery cells of the battery pack provided in this application;

[0049] Figure 8 This is a schematic diagram of one of the filling layer arrangement methods provided in this application;

[0050] Figure 9 This is a schematic diagram of the second arrangement of the filling layer provided in this application;

[0051] Figure 10 This is a schematic diagram of the third arrangement of the filling layer provided in this application;

[0052] Figure 11 This is a schematic diagram of the structure of the carrier tape and filler layer provided in this application;

[0053] In the diagram: 100, housing; 101, crossbeam structure; 200, battery pack; 201, battery bank; 1, battery cell; 11, first side; 12, second side; 13, insulating film edging; 14, housing space; 2, first heat insulation layer; 3, second heat insulation layer; 4, insulating board; 5, filling layer; 6, filling strip layer; 7, carrier tape. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this application.

[0055] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0057] This application addresses the problems mentioned in the background section by proposing a battery pack and an electrical device. The battery pack integrates several battery cells, which can be electrically connected in series, parallel, or a combination of both to supply power to the electrical device. The battery cells involved in the embodiments of this application can be secondary or primary batteries, and can be lithium-sulfur, sodium-ion, lithium-ion, or magnesium-ion batteries, but are not limited to these.

[0058] A battery cell typically consists of an end cap and a casing, which together enclose the internal space of the cell. In some examples, the casing has an opening, which the end cap closes. The opening can be located at one end of the casing or at opposite ends. The casing and end cap can be, but are not limited to, metallic materials such as aluminum or steel. One or more terminals can be configured on the end cap, depending on conventional settings.

[0059] The internal space of a battery cell contains electrode assemblies and electrolyte. Electrode assemblies typically include a positive electrode, a negative electrode, and a separator separating the positive and negative electrodes. The electrolyte can permeate the interior of the electrode assembly, providing ion migration pathways for electrochemical reactions and serving a conductive function. Electrode assemblies can be in the form of wound, stacked, etc. One or more electrode assemblies can be installed within the battery cell. The positive electrode has a positive tab, the negative electrode has a negative tab, and the terminals on the end cap include a positive terminal and / or a negative terminal. The positive tab is directly or indirectly electrically connected to the positive terminal, and the negative tab is directly or indirectly electrically connected to the negative terminal. Please refer to [link to relevant documentation]. Figures 1 to 5 as well as Figure 7 One embodiment of the battery pack provided in this application includes:

[0060] The casing 100 and several battery packs 200.

[0061] Several battery packs 200 are installed in the housing 100. The number of battery packs 200 is designed according to actual needs. The crossbeam structure 101 inside the housing 100, used to limit the end positions of the battery packs 200, is designed accordingly based on the number and distribution of the battery packs 200. The housing includes multiple side frames that enclose a cavity to accommodate the battery packs 200. The crossbeam structure 101 extends along a second direction and connects two opposing side frames. Two crossbeam structures 101 are arranged opposite each other along a first direction to clamp the two ends of the battery packs 200. Figure 2 As shown, when designing two battery packs 200, a crossbeam structure 101 can be added at the middle of the housing 100 to divide the receiving cavity into two adjacent spaces in a first direction, which, together with the crossbeam structures 101 at both ends, restrict the end positions of the battery packs 200. When designing four battery packs 200, a longitudinal beam structure intersecting the crossbeam structure 101 can be added at the middle of the housing 100 to divide the receiving cavity into four adjacent spaces along a second direction, for accommodating the four battery packs 200. By setting the crossbeam structure 101 and / or the longitudinal beam structure, the overall strength of the battery pack can be improved, and the reliability of the battery pack can be enhanced.

[0062] like Figure 2 As shown, the battery pack 200 includes at least one battery bar 201, and the battery bar 201 includes a plurality of battery cells 1 arranged in an array along a first direction.

[0063] like Figure 7 As shown, the battery cell 1 has a cuboid structure with two first side surfaces 11 and two second side surfaces 12.

[0064] Two first side surfaces 11 are arranged opposite each other in a first direction, and two second side surfaces 12 are arranged opposite each other in a second direction perpendicular to the first direction. The area of ​​the first side surface 11 is larger than the area of ​​the second side surface 12. The first side surface 11 is a large surface (wide surface), while the second side surface 12 is a small surface (narrow surface).

[0065] like Figure 1 , Figure 3 as well as Figure 5 As shown, a first heat insulation layer 2 is provided between the first side 11 of adjacent cells 1. The first heat insulation layer 2 is a silicone foam heat insulation layer.

[0066] The manufacturing process of silicone foam is relatively simple, involving steps such as mixing, vulcanization, foaming, and molding. It has a short production cycle and high production efficiency. Aerogel production technology is complex, requiring high-precision equipment and special drying processes, such as supercritical carbon dioxide drying. Equipment depreciation costs are high, energy consumption is large, and manufacturing costs account for approximately 44% of the total cost. Therefore, silicone foam is more economical than aerogel.

[0067] Furthermore, silicone foam possesses good flexibility and elasticity, capable of withstanding a certain degree of stretching, compression, and bending deformation, and is not easily broken. It can be used in applications requiring cushioning and shock absorption, such as the packaging lining of electronic devices. In contrast, aerogel has poor mechanical properties, low strength, poor toughness, and high brittleness, making it prone to breakage under external forces. Therefore, silicone foam offers better cushioning compared to aerogel.

[0068] like Figure 1 , Figure 3 as well as Figure 4 As shown, an insulating plate 4 is provided between the first side 11 at the end of the battery pack 200 and the housing 100, and a second heat insulation layer 3 is provided between the insulating plate 4 and the first side 11. It can be understood that the insulating plate 4 is provided between the first side 11 of one or more cells 1 at the end of the battery pack 200 and the crossbeam structure 101 of the housing 100, while the second heat insulation layer 3 is provided between the insulating plate 4 and the corresponding first side 11, thereby achieving limiting, heat insulation, and insulation between the battery pack 200 and the crossbeam structure 101, thus improving the overall safety protection of the battery pack.

[0069] In some embodiments, the insulating plate 4 can be a PC board. In terms of electrical performance, the excellent insulation properties of the PC board ensure extremely high safety. Its dielectric constant is stable, and it can effectively block current flow even under high-frequency and high-voltage environments, greatly reducing the risk of leakage. From a mechanical performance perspective, the high strength of the PC board is remarkable, which is one of the reasons why PC boards are used for end insulation in existing battery packs; details will not be elaborated further. The insulating plate 4 corresponds to the first side 11 of multiple battery cells 1, thereby further improving the overall strength and facilitating improved production efficiency.

[0070] Furthermore, the material of the second heat insulation layer 3 can be the same as that of the first heat insulation layer 2 to reduce costs. To improve the heat insulation effect at the end of the battery pack 200, aerogel can be used. Aerogel materials have excellent heat insulation properties, and using aerogel to prepare the second heat insulation layer 3 can effectively reduce its thickness, thus avoiding space occupation in the first direction. A thickness of 0.5 mm is sufficient to achieve the required heat insulation effect. The material and thickness of the second heat insulation layer 3 can be configured as needed.

[0071] The battery pack designed in this application has the following beneficial effects:

[0072] 1. A first heat insulation layer 2 is made of silicone foam material, which is cheaper than aerogel material, between the first side 11 (large surface) of the battery cell 1. This not only achieves heat insulation and improves the structural strength between the battery cells 1, but also effectively reduces costs, thus forming a cost advantage.

[0073] 2. A second heat insulation layer 3 is added between the first side 11 of the end cell 1 and the insulating plate 4. This not only meets the insulation requirements but also has good heat insulation and heat preservation functions, ensuring the charging rate of the battery pack in low-temperature environments and that it can be fully charged.

[0074] The above is Embodiment 1 of the battery pack provided in this application. The following is Embodiment 2 of the battery pack provided in this application. Please refer to the following for details. Figures 1 to 11 .

[0075] Based on the solution of Embodiment 1 above:

[0076] Furthermore, to better bond and fix the components, the first heat insulation layer 2 adopts a double-sided adhesive design, meaning that a first adhesive layer is provided on both sides of the first heat insulation layer 2 for bonding to the first side 11 respectively. This achieves heat insulation buffering between adjacent battery cells 1, improving overall safety.

[0077] Furthermore, the battery pack 200 includes at least two battery rows 201, or, for example, multiple battery rows 201. Figure 2 As shown, multiple battery packs 201 are arranged in an array along the second direction.

[0078] For multiple rows of battery cells 201, conventional methods involve using an epoxy board or direct bonding between the second sides 12. The epoxy board method increases the overall weight of the battery pack, impacting the vehicle's energy consumption. The direct bonding method, however, is less effective due to the presence of materials on the second side 12 of the battery cell 1. Figure 6 The insulating film edging 13 shown (the insulating film is wrapped around the outside of the cell and pasted to the outside of the cell 1 housing by folding the whole sheet, forming a folded edge with a greater thickness than other places at the bottom of the second side 12 (narrow side), which is also the insulating film edging 13) causes a first gap to be formed between adjacent battery rows 201 in the second direction at the position from the top of the cell 1 to the insulating film edging 13 (a first gap will be formed between the second side 12 above the insulating film edging 13). Affected by this first gap, the cell 1 will be tilted when the battery pack 200 is put into the box, which increases the difficulty of the process. At the same time, after the cell 1 is placed in the box, the tilted cell 1 is prone to uneven spacing between the cells 1, resulting in local overheating and increasing the risk of thermal runaway and short circuit.

[0079] like Figure 5 As shown, in order to avoid significantly increasing the overall weight while ensuring reduced process difficulty, this application provides a filling layer 5 in the first gap to absorb (fill) the gap caused by the insulating film edging 13. This design will not significantly increase the overall weight of the battery pack compared to the epoxy board, and can also prevent the double-row cells 1 from tilting during the packing process, which would affect the welding of the CCS assembly after packing and improve the process assembly yield. At the same time, it can also play a buffering role to avoid collisions and friction between the cells 1.

[0080] Furthermore, the height of the filling layer 5 extends from the top of the cell 1 to the edge of the insulating film 13, thus completely filling the first gap. This allows it to abut against the space between two adjacent cells 1, dispersing stress, preventing stress concentration, and improving structural stability. Simultaneously, it ensures a tighter connection between the various components within the battery pack, reducing internal voids and increasing the overall rigidity of the battery pack. Alternatively, the first gap can be partially filled; the filling layer 5 can be present only in a portion of the first gap above the edge of the insulating film. The specific design can be varied according to actual needs and is not limited.

[0081] The thickness of the filler layer 5 is greater than or equal to twice the thickness of the insulating film edging 13 to ensure that the first gap can be completely filled in terms of thickness. Through the elastic filler layer 5, the filler layer 5 has a certain effect of absorbing impact energy and transmitting impact force in the second direction, thereby reducing the impact load on the cell 1.

[0082] The purpose of filling layer 5 is to fill the first gap, and its arrangement is as follows:

[0083] Arrangement Method 1:

[0084] like Figure 8 As shown, the filler layers 5 disposed between adjacent battery packs 201 are sequentially connected to form filler strip layers 6; one side of the filler strip layer 6 is provided with a second adhesive layer for bonding to multiple second side surfaces 12. The filler strip layer 6 can correspond to at least two battery cells 1, and multiple filler strip layers 6 can be arranged sequentially along a first direction to realize the setting of filler layers 5 on one side of the battery pack 201. At this time, the length of the filler strip layer 6 along the first direction can be the same or different, and can be set as needed. Alternatively, a whole filler strip layer 6 can be set to realize the bonding of the filler layer 5 on the second side surface of the battery cells 1 of a row of battery packs 201 in one go.

[0085] In this embodiment, although the arrangement efficiency is improved, the battery pack 201 needs to be squeezed at both ends before being placed into the housing 100. Before the squeezing, the filling strip layer 6 is applied (the cells are arranged compactly inside the housing, and there is no space to apply the filling strip layer 6 after the battery pack 201 is placed into the housing). Squeezing the battery pack 201 will cause the filling strip layer 6 to wrinkle between two adjacent cells, which will affect the installation efficiency to a certain extent. At the same time, the wrinkled filling strip layer 6 will also affect the tilt of the cell 1, which is not conducive to the safety and reliability of the cell 1.

[0086] Arrangement Method Two:

[0087] like Figure 9As shown, multiple filler layers 5 are spaced apart in the first direction; one side of each filler layer 5 has a second adhesive layer for bonding to the second side 12. It can be understood that an independent filler layer 5 is adhered and fixed to the second side of each cell 1. While arrangement method two does not have the effect of wrinkling compared to arrangement method one, its arrangement efficiency is relatively low.

[0088] Arrangement Method 3:

[0089] like Figure 10 as well as Figure 11 As shown, it also includes a carrier tape 7; filling layers 5, disposed between adjacent battery packs 201, are sequentially spaced on the carrier tape 7, and the spacing between adjacent filling layers 5 in the first direction is consistent with the spacing between adjacent cells 1; a second adhesive layer is provided on the side of the carrier tape 7 facing away from the filling layers 5 for bonding to the second side 12. The filling layer 5 in Method 3 is the independent filling layer 5 of Method 2, but a carrier tape 7 is added to fix the independent filling layer 5 on the carrier tape 7, and the spacing between adjacent filling layers is consistent with the spacing between adjacent cells 1. This not only allows the filling layers 5 of the second side of a row of cells 1 to be fixed at one time, but also uses the spacing between the filling layers 5 to avoid the impact of wrinkles in the filling strip layer 6 on the box installation (the wrinkles in the carrier tape 7 have a very small impact on the box installation compared to the wrinkles in the filling layers). The design of Method 3 not only helps to start the process and improve the assembly efficiency of single-piece assembly, but also avoids the impact of wrinkles in the filling strip layer 6 on the box installation, improving the safety and reliability of cell 1 assembly.

[0090] Furthermore, such as Figure 10 As shown, the side of the first heat insulation layer 2 in the second direction is located within the chamfer of the edge of the battery cell 1, forming a receiving space 14 with the chamfer of the edge of the battery cell 1. The receiving space 14 can be used to receive the wrinkled carrier tape 7. This design further reduces the impact of wrinkling on the installation in the box and improves the assembly efficiency of personnel. Due to the manufacturing process, the outer shell of the battery cell forms a chamfer between the first and second sides of the battery cell 1. The first heat insulation layer 2 is located between the first sides of the two battery cells 1 and does not exceed the chamfer position to avoid uneven thickness between the first sides of adjacent battery cells 1. The receiving space 14 is formed between the side of the first heat insulation layer 2 facing the carrier tape 7 and the chamfer of the edge of the two adjacent battery cells 1. This receiving space corresponds to the carrier tape 7 and the gap between the two adjacent filling layers 5. Thus, when the battery pack 201 is squeezed and its length is reduced in the first direction, the carrier tape 7 is more likely to wrinkle, and the wrinkled carrier tape 7 can be received in the receiving space 14, avoiding interference with the battery pack installation in the box and also avoiding interference with other battery cells 1.

[0091] The thickness of the carrier tape 7 is less than that of the filler layer 5, so that it is easier to wrinkle, so that when the carrier tape 7 is relatively close to the adjacent cells 1, multiple layers of wrinkles can be formed, so that the wrinkled carrier tape 7 does not exceed the range of the housing space 14.

[0092] Of the three arrangement methods mentioned above, the third method is preferred. Those skilled in the art can modify the design according to actual needs without restriction.

[0093] Furthermore, the filling layer 5 is a silicone foam layer; while meeting the filling requirements, it can further improve the heat insulation and buffering effect.

[0094] Furthermore, the initial thickness of the filler layer 5 is greater than or equal to the extruded thickness of the first heat insulation layer 2, and less than or equal to the initial thickness of the first heat insulation layer 2; the initial thickness of the first heat insulation layer 2 is twice the extruded thickness.

[0095] With the initial thickness of the first insulation layer 2 as d1 and the extrusion thickness as d10, and the initial thickness of the filler layer 5 as d2, in order to save volume, increase energy density, and ensure buffering and insulation effects,

[0096] Designed as follows:

[0097] d1≥d2≥d10, and d1=2d10;

[0098] Specifically, after entering the box, the first insulation layer 2 will be constrained to form an extruded thickness d10. In order to save volume, d2 is designed to be greater than d10. At the same time, according to the requirement of avoiding constraint force and ensuring the insulation and buffering effect, d1 is designed to be 2d10. Taking d10=0.5mm as an example, then d1=1.0mm.

[0099] The filler layer 5 needs to fill the first gap between the second side 12 to prevent the cell 1 from tilting and to save space. Therefore, the thickness of the filler layer 5 is directly related to the thickness of the insulating film edging 13, which in turn determines the overall insulation of the cell 1. The thickness of the insulating film of the cell 1 itself, the initial thickness and the extrusion thickness of the first heat insulation layer 2 are mutually restrictive and jointly affect the installation space of the cells in the battery pack. If the insulating film is thick, the thickness of the first heat insulation layer needs to be appropriately reduced to avoid exceeding the total thickness, which would make it difficult to install the cell or cause interference with other components; conversely, if the first heat insulation layer is thick, the thickness of the insulating film needs to be thinned accordingly. At the same time, although the main function of the insulating film is insulation, it also affects the heat dissipation of the cell surface. A thicker insulating film may hinder the heat dissipation of the various sides or bottom of the cell 1. Under this premise, setting the initial thickness of the filling layer 5 to d1≥d2≥d10 can limit the thickness of the filling layer, insulating film, and first heat insulation layer 2, so as to balance the installation space of the cell 1 in the battery pack, the heat insulation effect, and the electrical safety. For example, if d2=0.6~1.0mm, then the gap between the second side 12 between the two rows of cells 1 is 0.6mm~1.0mm, and the thickness of the insulating film edging 13 can be configured to be 0.3mm~0.5mm.

[0100] This application also discloses an electrical device, including a device body and a battery pack, wherein the battery pack is installed in the device body and is used to supply power to the device body.

[0101] The battery pack and electrical equipment provided in this application have been described in detail above. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the embodiments of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery pack, characterized in that, Includes a housing (100) and several battery packs (200); Several of the battery packs (200) are installed in the housing (100); The battery pack (200) includes at least one battery bank (201). The battery pack (201) includes a plurality of battery cells (1) arranged in an array along a first direction; The battery cell (1) has two first sides (11) and two second sides (12). The two first side surfaces (11) are arranged opposite each other in the first direction; The two second side surfaces (12) are arranged opposite each other in a second direction perpendicular to the first direction; The area of ​​the first side (11) is larger than the area of ​​the second side (12); A first heat insulation layer (2) is provided between the first side (11) of adjacent cells (1); The first insulation layer (2) is a silicone foam insulation layer; An insulating plate (4) is provided between the first side (11) at the end of the battery pack (200) and the housing (100). A second heat insulation layer (3) is provided between the insulating plate (4) and the first side surface (11).

2. The battery pack according to claim 1, characterized in that, The battery pack (200) includes at least two battery banks (201); At least two of the battery packs (201) are arranged in an array along the second direction; The second side (12) is folded upward from the bottom and has an insulating film edging (13); A first gap is formed between adjacent cells (1) in the second direction at the position from the top of the cell (1) to the edge (13) of the insulating film; A filling layer (5) is provided in the first gap.

3. The battery pack according to claim 2, characterized in that, The height of the filling layer (5) extends from the top of the cell (1) to the edge of the insulating film (13). The thickness of the filling layer (5) is greater than or equal to twice the thickness of the insulating film edging (13).

4. The battery pack according to claim 2, characterized in that, The filling layer (5) disposed between adjacent battery bars (201) is sequentially connected to form a filling strip layer (6). One side of the filler strip layer (6) is provided with a second adhesive layer for bonding to the second side surface (12).

5. The battery pack according to claim 2, characterized in that, The plurality of filling layers (5) are spaced apart in the first direction; One side of the filler layer (5) is provided with a second adhesive layer for bonding to the second side surface (12).

6. The battery pack according to claim 2, characterized in that, It also includes the carrier tape (7); The filling layer (5) disposed between adjacent battery packs (201) is sequentially and spaced apart on the carrier tape (7), and the spacing between adjacent filling layers (5) in the first direction is consistent with the spacing between adjacent cells (1); The carrier tape (7) has a second adhesive layer on the side facing away from the filler layer (5) for bonding to the second side surface (12).

7. The battery pack according to claim 6, characterized in that, The side of the first heat insulation layer (2) in the second direction is located within the edge chamfer of the cell (1) and forms a carrier tape (7) receiving space (14) with the edge chamfer of the cell (1). The receiving space (14) can be used to receive the crumpled carrier tape (7).

8. The battery pack according to claim 2, characterized in that, The filling layer (5) is a silicone foam layer.

9. The battery pack according to claim 3, characterized in that, The initial thickness of the filling layer (5) is greater than or equal to the extruded thickness of the first heat insulation layer (2), and less than or equal to the initial thickness of the first heat insulation layer (2); The initial thickness of the first insulation layer (2) is twice the extruded thickness.

10. Electrical equipment, characterized in that, Includes the main body of the device and the battery pack as described in any one of claims 1 to 9; The battery pack is installed on the main body of the device and is used to supply power to the main body of the device.

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