Pouch battery and power tool
By covering the surface of the cell assembly with a thermally conductive buffer layer and a support structure, the problems of heat dissipation and mechanical shock absorption in traditional pouch batteries are solved, achieving efficient heat dissipation and deformation buffering of the cell, and improving the safety and reliability of the battery.
Patent Information
- Application Number
- CN202521745792.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-15
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-15
AI Technical Summary
Traditional pouch batteries have thermal conductivity and cushioning materials that cannot simultaneously meet the requirements of heat dissipation and mechanical shock absorption, which increases the risk of casing rupture when the cell expands and deforms.
A thermally conductive buffer layer is used to cover the surface of the battery cell assembly, especially between adjacent cells and on multiple surfaces of the battery cell assembly. Combined with the support structure, this achieves uniform heat conduction and mechanical buffering.
It improves the heat dissipation efficiency of the battery cell, reduces the possibility of excessive local temperature, reserves deformation space to avoid casing cracking or battery cell damage, and enhances the safety and reliability of the soft pack battery.
Smart Images
Figure CN224683252U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and more specifically, to a soft-pack battery and a power tool. Background Technology
[0002] Due to their high energy density and flexible shape, pouch batteries are increasingly being used in power tools, portable devices, and other fields. However, pouch batteries generate a significant amount of heat during charging and discharging, which can cause the internal cells to expand and deform, potentially posing safety risks. To ensure reliable operation at high energy density, pouch batteries need to dissipate heat from the cells as quickly as possible to prevent uncontrolled localized temperature rises, while also allowing space for cell expansion to prevent casing rupture.
[0003] Traditional pouch batteries have difficulty simultaneously meeting the above requirements in terms of thermal conductivity and cushioning materials: metal heat sinks have good thermal conductivity but exacerbate mechanical stress; foam can cushion but hinders heat dissipation; and silicone grease requires curing and encapsulation and cannot adapt to deformation. Utility Model Content
[0004] The purpose of this invention is to provide a soft-pack battery and power tool that can simultaneously achieve heat conduction and mechanical vibration reduction, thereby improving the safety and reliability of the soft-pack battery.
[0005] The embodiments of this utility model are implemented as follows:
[0006] In one aspect, the present invention provides a pouch battery, including a housing, a cell assembly and a circuit board assembly disposed within the housing, the cell assembly having a connection end for electrical connection with the circuit board assembly; the pouch battery further includes a thermally conductive buffer layer covering at least one side of the cell assembly other than the side where the connection end is located.
[0007] Optionally, the battery cell assembly includes multiple battery cells stacked together, with a thermally conductive buffer layer between any two adjacent battery cells.
[0008] Optionally, the dimension of the thermally conductive buffer layer between two adjacent cells along the width direction of the housing is less than or equal to the dimension of the cell along the width direction of the housing.
[0009] Optionally, the dimension of the thermally conductive buffer layer between the cells along the length of the housing is less than or equal to the dimension of the cells along the length of the housing.
[0010] Optionally, the bottom surface of the battery cell assembly and the two sides along the width direction of the housing are covered with a thermally conductive buffer layer, and the thermally conductive buffer layer on the bottom surface and the thermally conductive buffer layer on the two sides are integrally formed.
[0011] Optionally, the thermally conductive buffer layer disposed on the two sides of the cell assembly along the width direction of the housing has a dimension along the thickness direction of the housing that is less than or equal to the dimension of the cell assembly along the thickness direction of the housing.
[0012] Optionally, the cell assembly has a thermally conductive buffer layer on the end face opposite to the connection end, and the dimension of the thermally conductive buffer layer along the width direction of the housing is less than or equal to the dimension of the cell assembly along the width direction of the housing.
[0013] Optionally, a bracket is also provided inside the housing. The bracket has a first mounting plate and a second mounting plate that are perpendicular to each other. The battery cell assembly is disposed in the accommodating cavity formed by the first mounting plate, the second mounting plate and the inner wall of the housing. A thermally conductive buffer layer is provided between the top of the battery cell assembly and the first mounting plate.
[0014] Optionally, the thermally conductive buffer layer is a thermally conductive silicone layer.
[0015] Another aspect of this invention provides an electric tool that can be detachably fitted with a pouch battery.
[0016] The beneficial effects of this utility model include:
[0017] This application also provides a pouch battery, including a casing, a cell assembly disposed within the casing, and a circuit board assembly. The cell assembly has a connection terminal for electrical connection with the circuit board assembly, facilitating electrical control of the cell assembly by the circuit board assembly. The pouch battery also includes a thermally conductive buffer layer covering at least one side of the cell assembly except for the side with the connection terminal. The thermally conductive buffer layer is directly attached to the outer wall of the cell assembly, which improves the heat dissipation of the cell assembly, reduces the possibility of local overheating, and improves the reliability and safety of the pouch battery. Simultaneously, the thermally conductive buffer layer provides space for deformation. When the cell bulges due to charging and discharging, the compressibility of the thermally conductive buffer layer can alleviate internal pressure, preventing casing rupture or cell damage, and reducing the possibility of cell assembly failure due to expansion. The above-mentioned pouch battery can simultaneously achieve heat conduction and mechanical shock absorption, improving the safety and reliability of the pouch battery. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 One of the structural schematic diagrams of the soft-pack battery provided in the embodiments of this utility model;
[0020] Figure 2 This is the second schematic diagram of the structure of the soft-pack battery provided in the embodiment of this utility model;
[0021] Figure 3 This is a magnified view of the details at point A;
[0022] Figure 4 The third schematic diagram of the structure of the soft-pack battery provided in the embodiment of this utility model.
[0023] Icons: 100-Pack battery; 110-Casing; 120-Cell assembly; 121-Cell; 122-Connector; 131-First circuit board; 132-Second circuit board; 140-Bracket; 141-First mounting plate; 142-Second mounting plate; 143-Side plate; 150-Heat-conducting buffer layer; a-Length direction; b-Width direction; c-Thickness direction. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0025] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] In the description of this utility model, 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, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable 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 this utility model based on the specific circumstances.
[0030] Please refer to Figure 1 This embodiment provides a soft-pack battery 100, including a housing 110, a cell assembly 120 disposed within the housing 110, and a circuit board assembly. The cell assembly 120 has a connection terminal 122 for electrical connection with the circuit board assembly. The soft-pack battery 100 also includes a thermally conductive buffer layer 150 covering at least one side of the cell assembly 120 other than the side where the connection terminal 122 is located.
[0031] Specifically, the cell assembly 120 includes a plurality of cells 121 for energy storage in the pouch cell 100. For example... Figure 1 As shown, multiple battery cells 121 are stacked sequentially along the thickness direction c of the housing 110 to improve the space utilization within the housing 110. Each battery cell 121 has tabs; in a preferred embodiment of this application, the tabs of any two adjacent battery cells 121 are located on the same side, collectively forming the connection end 122 of the battery cell assembly 120. (As shown...) Figure 1 As shown, in one specific embodiment of this application, the connection end 122 is located at one end of the cell assembly 120 along the length direction a of the housing 110.
[0032] like Figure 1 As shown, the circuit board assembly includes a first circuit board 131 and a second circuit board 132 that are electrically connected to each other. The first circuit board 131 is spaced apart on the top of the cell assembly 120, and the second circuit board 132 is electrically connected to the connection end 122 of the cell assembly 120 and is perpendicular to the first circuit board 131, so as to improve the space utilization and heat dissipation efficiency within the housing 110.
[0033] like Figure 1As shown, at least one side of the battery cell assembly 120, excluding the side where the connection end 122 is located, is covered with a thermally conductive buffer layer 150. The thermally conductive buffer layer 150 is directly attached to the outer wall of the battery cell assembly 120, which improves the heat dissipation of the battery cell assembly 120, reduces the possibility of localized overheating, and improves the reliability and safety of the pouch battery 100. Simultaneously, the thermally conductive buffer layer 150 provides space for deformation; when the battery cell 121 bulges due to charging and discharging, the compressibility of the thermally conductive buffer layer 150 can alleviate internal pressure, preventing the casing 110 from cracking or the battery cell 121 from being damaged, thus reducing the possibility of damage to the battery cell assembly 120 due to expansion. Preferably, all sides of the battery cell assembly 120, except for the side where the connection end 122 is located, are covered with the thermally conductive buffer layer 150 to maximize the heat dissipation and shock absorption effects of the battery cell assembly 120.
[0034] Optionally, the thermally conductive buffer layer 150 is a thermally conductive silicone layer. Silicone material has good flexibility and elasticity, and can serve as a filler between the battery cell assembly 120 and the housing 110, absorbing the impact of external vibrations or shocks on the battery cell 121 and reducing the risk of mechanical damage. As a thermally conductive medium between the battery cells 121, the thermally conductive silicone layer can quickly transfer the heat generated by the battery cell 121 during operation to the housing 110 or other heat dissipation structures, solving the problem of heat accumulation caused by the dense arrangement of the pouch battery 100 and improving overall heat dissipation efficiency.
[0035] In one possible implementation of this application, such as Figure 1 As shown, a thermally conductive buffer layer 150 is provided between any two adjacent battery cells 121. Since adjacent battery cells 121 generate heat simultaneously during operation, the thermally conductive buffer layer 150 between adjacent battery cells 121 can act as a heat conduction medium between the battery cells 121, uniformly transferring heat within the battery cell 121 assembly and preventing excessive local temperature rise in a single battery cell 121. Simultaneously, in conjunction with the thermally conductive buffer layers 150 on other surfaces of the battery cells 121, a comprehensive heat dissipation path is formed. Furthermore, the flexible nature of the thermally conductive buffer layer 150 can create elastic isolation between adjacent battery cells 121, reducing mutual friction or compression caused by vibration or collision, and lowering the risk of damage to the battery cell assembly 120.
[0036] It should be noted that, in one possible implementation of this application, such as Figure 2 and Figure 3 As shown, in order to ensure the compatibility of each component in the soft-pack battery 100 and improve assembly efficiency, the size of the thermally conductive buffer layer 150 between two adjacent cells 121 along the width direction b of the housing 110 is less than or equal to the size of the cell 121 along the width direction b of the housing 110, so as to avoid the thermally conductive buffer layer 150 extending out of the edge of the cell 121 and interfering with other components.
[0037] When the thermally conductive buffer layer 150 itself has a certain degree of extensibility, such as when the thermally conductive buffer layer 150 is a thermally conductive silicone layer, preferably, the dimension of the thermally conductive buffer layer 150 between two adjacent cells 121 along the width direction b of the housing 110 is smaller than the dimension of the cell 121 along the width direction b of the housing 110. In this way, when assembling the thermally conductive buffer layer 150, it is only necessary to ensure that any side of the thermally conductive buffer layer 150 along the width direction b of the housing 110 is aligned with the corresponding side of the cell 121, so as to avoid the thermally conductive buffer layer 150 overflowing from between the cells 121 along the width direction b of the housing 110 during assembly due to the extensibility of the thermally conductive buffer layer 150.
[0038] In one possible implementation of this application, in order to ensure the compatibility of the components in the pouch battery 100 and improve assembly efficiency, such as... Figure 1 As shown, the dimension of the thermally conductive buffer layer 150 between the cells 121 along the length direction a of the housing 110 is less than or equal to the dimension of the cell 121 along the length direction a of the housing 110, so as to avoid the thermally conductive buffer layer 150 extending beyond the edge of the cell 121 and interfering with other components.
[0039] Similarly, when the thermally conductive buffer layer 150 itself has a certain degree of extensibility, such as when the thermally conductive buffer layer 150 is a thermally conductive silicone layer, preferably, the dimension of the thermally conductive buffer layer 150 between two adjacent cells 121 along the length direction a of the housing 110 is smaller than the dimension of the cell 121 along the length direction a of the housing 110. In this way, when assembling the thermally conductive buffer layer 150, it is only necessary to ensure that any side of the thermally conductive buffer layer 150 along the length direction a of the housing 110 is aligned with the corresponding side of the cell 121, so as to avoid the thermally conductive buffer layer 150 overflowing from between the cells 121 along the length direction a of the housing 110 during assembly due to the extensibility of the thermally conductive buffer layer 150.
[0040] To balance the ease of assembly and heat dissipation efficiency of the thermally conductive buffer layer 150, in a specific embodiment of this application, the thermally conductive buffer layer 150 between two adjacent battery cells 121 satisfies the requirement that its length direction a dimension is smaller than the length of the battery cell 121, or its width direction b dimension is smaller than the width of the battery cell 121. This allows for rapid positioning through single-sided alignment in this direction, reducing bidirectional alignment operations during assembly and significantly improving production efficiency. Furthermore, compared to a design where both the length and width of the thermally conductive buffer layer 150 are smaller than the battery cell 121, the smaller dimension of the thermally conductive buffer layer 150 along a single direction preserves the maximum contact area, ensuring effective adhesion between the thermally conductive buffer layer 150 and the surface of the battery cell 121. This avoids weakening the heat dissipation or buffering effect due to insufficient contact area caused by bidirectional dimensional reduction.
[0041] In one possible implementation of this application, such as Figure 4As shown, the bottom surface of the battery cell assembly 120 and the two sides along the width direction b of the housing 110 are all covered with a thermally conductive buffer layer 150, and the thermally conductive buffer layer 150 on the bottom surface and the thermally conductive buffer layers 150 on the two sides are integrally formed. That is to say, the thermally conductive buffer layer 150 on the bottom surface of the battery cell assembly 120 and the thermally conductive buffer layers 150 on the two sides are the same thermally conductive buffer layer 150. During assembly, it is only necessary to cover one side of the battery cell assembly 120 first, and then cover the bottom surface and the other side in sequence to achieve seamless coverage of the thermally conductive buffer layer 150 and form a continuous integral structure.
[0042] The one-piece thermally conductive buffer layer 150 can eliminate the gaps that may exist in the segmented structure, so that the heat generated by the battery cell 121 can be seamlessly conducted between the bottom surface and the two sides, avoiding heat accumulation at the splicing points, enhancing the overall heat dissipation efficiency, optimizing the buffering effect, reducing assembly steps and alignment times, reducing the risk of dimensional deviation caused by multiple assembly, and improving production efficiency.
[0043] For example, such as Figure 4 As shown, the thermally conductive buffer layer 150 disposed on both sides of the battery cell assembly 120 along the width direction b of the housing 110 has a dimension along the thickness direction c of the housing 110 that is less than or equal to the dimension of the battery cell assembly 120 along the thickness direction c of the housing 110. In other words, the covering dimension of the thermally conductive buffer layer 150 disposed on both sides of the battery cell assembly 120 along the width direction b in the thickness direction c does not exceed the dimension of the battery cell assembly 120 itself along the thickness direction c.
[0044] In one specific embodiment of this application, in order to improve the stability of the battery cell assembly 120, ensure the compatibility of each component, and provide support for the circuit board assembly, such as... Figure 4 As shown, a bracket 140 is also provided inside the housing 110. The bracket 140 includes a first mounting plate 141 and a second mounting plate 142 that are perpendicularly connected to each other. An L-shaped side plate 143 is connected between the first mounting plate 141 and the second mounting plate 142. The battery cell assembly 120 is disposed within an accommodating cavity formed by the first mounting plate 141, the second mounting plate 142, the side plate 143, and the inner wall of the housing 110. It should be noted that there are two side plates 143, which are disposed on both sides in the width direction.
[0045] If the dimension of the thermally conductive buffer layer 150 in the thickness direction c of the housing 110 exceeds the dimension of the cell assembly 120 in that direction, it may be squeezed against the upper and lower inner walls of the housing 110 or the bracket 140, affecting the closure of the housing 110 or the fixing effect of the bracket 140 on the cell assembly 120.
[0046] In this embodiment, in the width direction b, the projected portion of the side plate 143 and the corresponding side of the thermally conductive buffer layer 150 in the width direction b coincide. That is, the side plate 143 can press against the edge of the corresponding side of the thermally conductive buffer layer 150, thus limiting the thermally conductive buffer layer 150. The side plate 143 is L-shaped rather than rectangular, which can achieve limiting but will not cover the entire side of the thermally conductive buffer layer 150, thereby improving the heat dissipation effect.
[0047] Optionally, the cell assembly 120 has a thermally conductive buffer layer 150 on the end face opposite to the connection end 122. The dimension of the thermally conductive buffer layer 150 along the width direction b of the housing 110 is less than or equal to the dimension of the cell assembly 120 along the width direction b of the housing 110.
[0048] The end face of the battery cell assembly 120 is an area where heat easily accumulates. Covering it with a thermally conductive buffer layer 150 can conduct the heat in this area to the housing 110 or other heat dissipation structures through the buffer layer, further improving heat dissipation efficiency and overall buffering effect.
[0049] To ensure the compatibility of the components in the pouch battery 100 and improve assembly efficiency, the dimension of the thermally conductive buffer layer located on the end face of the cell assembly 120 opposite to the connection end 122 along the width direction b of the housing 110 is less than or equal to the dimension of the cell assembly 120 along the width direction b of the housing 110, so as to avoid the thermally conductive buffer layer 150 extending out of the edge of the cell 121 and interfering with other components.
[0050] When the thermally conductive buffer layer 150 itself has a certain degree of extensibility, such as when the thermally conductive buffer layer 150 is a thermally conductive silicone layer, preferably, the dimension of the thermally conductive buffer layer located on the end face of the cell assembly 120 opposite to the connection end 122 along the width direction b of the housing 110 is smaller than the dimension of the cell assembly 120 along the width direction b of the housing 110. In this way, when assembling the thermally conductive buffer layer 150, it is only necessary to ensure that any side of the thermally conductive buffer layer 150 along the width direction b of the housing 110 is aligned with the side corresponding to the cell 121, so as to avoid the thermally conductive buffer layer 150 overflowing along the width direction b of the housing 110 during assembly due to the extensibility of the thermally conductive buffer layer 150.
[0051] Optionally, such as Figure 1 As shown, a thermally conductive buffer layer 150 is provided between the top of the cell assembly 120 and the first mounting plate 141 of the bracket 140. The heat generated by the cell assembly 120 during operation can be transferred to the bracket 140 through the thermally conductive buffer layer 150 on the top, and then conducted by the bracket 140 to the heat dissipation space near the housing 110, further improving the overall heat dissipation efficiency of the pouch battery 100.
[0052] Furthermore, the thermally conductive buffer layer 150 disposed on the top of the cell assembly 120 can absorb the upward stress generated by the cell assembly 120 due to bulging or vibration, avoid the structural deformation caused by the cell assembly 120 directly pressing the first mounting plate 141 of the bracket 140, reduce the rigid pressure of the bracket 140 on the cell 121, protect the flexible shell of the soft-pack cell 121, and improve the reliability of the soft-pack battery 100.
[0053] Another aspect of this utility model is to provide an electric tool that can be detachably fitted with a pouch battery 100.
[0054] Specifically, the power tool can slide and engage with the sliding groove on the housing 110 of the pouch battery 100 through its own sliding groove structure, allowing the pouch battery 100 to be quickly inserted into or removed from the power tool in a specific direction, simplifying the installation and removal operation. The pouch battery 100 is provided with terminals. When the battery pack is slidably engaged with the power tool, the terminals can precisely align with the electrode plates on the power tool to form an electrical connection, supplying power to the power tool. The specific structure and beneficial effects of the pouch battery 100 have been described in detail above and will not be repeated here.
[0055] The cell assembly 120 of the soft-pack battery 100 is covered with a thermally conductive buffer layer 150. The thermally conductive buffer layer 150 serves as a thermally conductive medium to quickly dissipate the working heat of the cell 121, preventing the battery from overheating during long-term operation of the power tool; it also absorbs vibration and provides space to accommodate the bulging of the cell 121, reducing the safety risks caused by high temperature or deformation, and improving the safety and reliability of the power tool.
[0056] The above description is merely an optional embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.
Claims
1. A soft-pack battery, characterized in that, The battery pack (100) includes a housing (110), a cell assembly (120) disposed within the housing (110), and a circuit board assembly. The cell assembly (120) has a connection terminal (122) for electrical connection with the circuit board assembly. The pouch battery (100) also includes a thermally conductive buffer layer (150) covering at least one side of the cell assembly (120) except the side where the connection terminal (122) is located.
2. The soft-pack battery according to claim 1, characterized in that, The battery cell assembly (120) includes a plurality of battery cells (121) stacked together, and a thermally conductive buffer layer (150) is provided between any two adjacent battery cells (121).
3. The soft-pack battery according to claim 2, characterized in that, The dimension of the thermally conductive buffer layer (150) between two adjacent cells (121) along the width direction (b) of the housing (110) is less than or equal to the dimension of the cell (121) along the width direction (b) of the housing (110).
4. The soft-pack battery according to claim 2, characterized in that, The dimension of the thermally conductive buffer layer (150) between two adjacent cells (121) along the length direction (a) of the housing (110) is less than or equal to the dimension of the cell (121) along the length direction (a) of the housing (110).
5. The soft-pack battery according to claim 1, characterized in that, The bottom surface of the battery cell assembly (120) and the two sides along the width direction (b) of the housing (110) are covered with the thermally conductive buffer layer (150), and the thermally conductive buffer layer (150) on the bottom surface and the thermally conductive buffer layer (150) on the two sides are integrally formed.
6. The soft-pack battery according to claim 5, characterized in that, The thermally conductive buffer layer (150) disposed on two sides of the cell assembly (120) along the width direction (b) of the housing (110) has a dimension along the thickness direction (c) of the housing (110) that is less than or equal to the dimension of the cell assembly (120) along the thickness direction (c) of the housing (110).
7. The soft-pack battery according to claim 1, characterized in that, The cell assembly (120) has a thermally conductive buffer layer (150) on the end face opposite to the connection end (122). The size of the thermally conductive buffer layer (150) along the width direction (b) of the housing (110) is less than or equal to the size of the cell assembly (120) along the width direction (b) of the housing (110).
8. The soft-pack battery according to claim 1, characterized in that, The housing (110) is further provided with a bracket (140), the bracket (140) having a first mounting plate (141) and a second mounting plate (142) that are perpendicular to each other, the battery cell assembly (120) is disposed in the accommodating cavity formed by the first mounting plate (141), the second mounting plate (142) and the inner wall of the housing (110); a thermally conductive buffer layer (150) is provided between the top of the battery cell assembly (120) and the first mounting plate (141).
9. The soft-pack battery according to claim 1, characterized in that, The thermally conductive buffer layer (150) is a thermally conductive silicone layer.
10. A power tool, characterized in that, The pouch cell (100) according to any one of claims 1-9 can be detachably installed.