Pressure self-adaptive module and battery pack
By designing a pressure adaptive module, the problems of contact interface stratification and gaps caused by electrode deformation in all-solid-state batteries were solved, battery pressure uniformity regulation and adaptive adjustment were achieved, and battery performance and life were improved.
Patent Information
- Application Number
- CN202510826214.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-19
- Publication Date
- 2025-09-30
AI Technical Summary
In all-solid-state batteries, the "solid-solid" contact surface between the positive and negative electrodes and the solid electrolyte deforms during the cycle, resulting in stratification and voids in the contact interface, affecting battery performance. Uneven pressure causes stress concentration and mechanical failure in the electrolyte layer, leading to battery short circuit, open circuit or performance degradation.
A pressure adaptive module is designed, including a module body, a pressure adaptive component, a pressure uniformity adjustment component, a base and a package pressurizing component. Through the cooperation of these components, adaptive adjustment and uniformity adjustment of the module pressure are achieved, ensuring that the maximum and minimum pressures of the battery cell are within the appropriate range and adapting to the changes in battery cell thickness under different SOCs and temperatures.
It effectively solves the contact interface stratification and void problems caused by electrode deformation in all-solid-state batteries, ensures the stability of battery performance and life, maintains pressure uniformity within the optimal range, and improves the overall performance and life of the battery.
Smart Images
Figure CN120728136A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of power battery technology, and in particular to a pressure adaptive module and a battery pack. Background Art
[0002] As the next generation of battery technology, all-solid-state batteries have attracted much attention due to their advantages such as high energy density, high safety, and long life. However, existing all-solid-state batteries still have technical problems that need to be solved.
[0003] In all-solid-state batteries, there is a solid-solid interface between the positive and negative electrodes and the solid electrolyte. During cycling, the electrodes deform, causing delamination and voids at the interface with the solid electrolyte, increasing the battery's internal resistance and impacting performance.
[0004] Uneven pressure can lead to stress concentration and uneven loading in the electrolyte layer. This can cause mechanical failure between local electrolyte grains at small grain boundaries through isostatic compression during cycling, leading to macroscopic defects in the electrolyte layer, such as microcrack expansion and bulge collapse, resulting in battery short circuits and open circuit failures. Uneven contact areas between local electrode and electrolyte materials can lead to current and stress concentration, causing localized potentials to be too high or too low, and electrochemical reaction rates and degrees to be too high or too low. This can lead to localized failure of the overall electrode chemistry and structure, resulting in degraded battery performance.
[0005] When the pressure is insufficient, the contact area and contact retention between the positive electrode material particles and the electrolyte particles are insufficient, making charge transfer more difficult and the potential deviating from the normal charge and discharge range of the electrode material, generating a low-electronic and ionic conductivity intermediate phase. The polarization of the positive electrode continues to deteriorate, and the internal resistance and capacity of the battery deteriorate. The proportion of effective lithium ion deposition paths on the negative electrode side decreases, and the number of paths increases, causing the overall lithium ion diffusion rate to be lower than the lithium atom accumulation rate, forming lithium moss or lithium dendrites, which react with the electrolyte to form a high-electronic conductivity intermediate phase, causing the battery to short-circuit and fail.
[0006] Based on this, it is necessary to design a pressure adaptive module to solve the above problems. Summary of the Invention
[0007] In view of this, in order to overcome the defects of the prior art, the present invention provides a pressure adaptive module and battery pack, which effectively solves the problem that the electrodes of existing all-solid-state batteries will deform during the cycle due to the existence of a "solid-solid" contact surface, resulting in stratification and gaps on the contact interface with the solid electrolyte, resulting in increased internal resistance of the battery and affecting battery performance.
[0008] According to a first aspect of the present invention, a pressure adaptive module is provided, wherein the pressure adaptive module includes a module body formed by stacking multiple battery cells, a pressure adaptive component, a pressure uniformity adjustment component, a base and a packaging pressurization component, the pressure uniformity adjustment component is arranged at both ends of the module body, the pressure uniformity adjustment component is connected to the base through the pressure adaptive component, and the packaging pressurization component is sleeved on the module body, the pressure adaptive component, the pressure uniformity adjustment component and the base.
[0009] Preferably, the battery cells are grouped in pairs to form a battery cell group, and buffer members are provided at both ends of the battery cell group.
[0010] Preferably, the pressure adaptive component includes a pneumatic bag and a position limiting protection frame, the pneumatic bag is arranged inside the position limiting protection frame, and two side surfaces of the pneumatic bag respectively abut against the base and the pressure uniformity adjustment component.
[0011] Preferably, the pressure uniformity adjustment component includes a pressure equalizing plate and a memory alloy bracket, the pressure equalizing plate abuts the module body, a plurality of pressure equalizing cavities spaced from each other are opened in the middle of the pressure equalizing plate, the memory alloy bracket is arranged in the pressure equalizing cavity, and the memory alloy bracket includes a support portion for abutting the four walls of the pressure equalizing cavity.
[0012] Preferably, the pressure uniformity adjustment component further includes a pressure collection piece and an insulating piece, the insulating piece is arranged between the module body and the pressure equalizing plate, and the pressure collection piece is arranged on the other end face of the pressure equalizing plate where the insulating piece is arranged.
[0013] Preferably, the base includes a limit block and connecting blocks located at both ends of the limit block. When the packaging pressurizing assembly is sleeved on the base, the packaging pressurizing assembly abuts the connecting block, and the side of the packaging pressurizing assembly abuts the limit block.
[0014] Preferably, the number of the packaging pressurizing components corresponds one to one to the number of the connecting blocks.
[0015] Preferably, a middle portion of the base protrudes in a direction away from the module body to form a protruding block, and the packaging pressurizing assembly includes a bending structure corresponding to the protruding block.
[0016] Preferably, the packaging pressurization assembly includes a packaging body and a memory alloy sheet, the memory alloy sheet is arranged on the side of the packaging body facing away from the module body, the memory alloy sheet includes a plurality of bending portions, and the plurality of bending portions are bent in a direction away from the module body; and / or the side of the packaging body facing away from the module body is the outer side surface, and the side of the packaging body facing the module body is the inner side surface, and the surface of the inner side surface is provided with a powder coating.
[0017] According to a second aspect of the present invention, a battery pack is provided, wherein the battery pack includes the pressure adaptive module as described above.
[0018] According to the pressure adaptive module of the present invention, the module pressure can be adaptively adjusted through the cooperation of the module body, the pressure adaptive component, the pressure uniformity adjustment component, the base and the packaging pressurizing component, thereby solving the problem of stratification and gaps on the contact interface with the solid electrolyte caused by deformation of the electrode during the cycle in the all-solid-state battery; the pressure uniformity adjustment component is used to adjust the pressure uniformity of the module body, ensuring that the maximum and minimum pressures of the battery cell are within the appropriate range; the pressure adaptive component can ensure sufficient pressure and can adaptively adjust the pressure according to different operating conditions, ensuring the total pressure, maximum pressure and minimum pressure of the battery cell when the thickness of the battery cell changes under different SOC (State of Charge) and different temperature environments; in addition, the pressure adaptive component can also be used to adjust the pressure when the pressure adaptive module is assembled and repaired. The overall structure of the pressure adaptive module is compact and the layout is tight, which can ensure the continuous stability of the solid-solid interface, effectively guaranteeing the performance and life of the assembled battery, and ensuring that the pressure and pressure uniformity of the all-solid-state battery module are maintained within the optimal range.
[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0021] Figure 1 A schematic structural diagram of a pressure adaptive module according to an embodiment of the present invention is shown; Figure 2A schematic diagram showing a partial structure of a module body according to an embodiment of the present invention is shown; Figure 3 A schematic structural diagram of a packaging and pressurizing assembly according to an embodiment of the present invention is shown; Figure 4 A schematic structural diagram of a pressure adaptive component according to an embodiment of the present invention is shown; Figure 5 A schematic structural diagram of a pressure uniformity adjustment assembly according to an embodiment of the present invention is shown; Figure 6 A schematic diagram showing a partial structure of a pressure equalizing plate according to an embodiment of the present invention is shown; Figure 7 A first structural schematic diagram of a base according to an embodiment of the present invention is shown; Figure 8 A second structural schematic diagram of a base according to an embodiment of the present invention is shown.
[0022] Figure markings: 1-module body; 101-battery cell; 102-buffer component; 2-pressure adaptive component; 201-pneumatic bag; 202-limiting protection frame; 3-pressure uniformity adjustment component; 301-equalizing plate; 302-memory alloy bracket; 303-support part; 304-pressure collection plate; 305-insulating plate; 306-pressure equalizing chamber; 4-base; 401-limiting block; 402-connecting block; 403-protruding block; 5-package pressurizing component; 501-bending structure; 502-memory alloy sheet; 503-bending part; 504-powder coating. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.
[0024] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.
[0025] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it 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 rather that it can be slightly tilted.
[0026] In the description of the embodiments of the present application, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0027] According to a first aspect of the present invention, a pressure adaptive module is provided, such as Figures 1 to 8 As shown, the pressure adaptive module can be used as part of a battery pack to solve the problems of uneven pressure and insufficient pressure in all-solid-state batteries. The pressure adaptive module includes a module body 1, a pressure adaptive component 2, a pressure uniformity adjustment component 3, a base 4 and a packaging pressurization component 5.
[0028] In the following description, reference will be made to Figures 1 to 8 The detailed structures of the module body 1, pressure adaptive component 2, pressure uniformity adjustment component 3, base 4 and packaging pressurizing component 5 of the pressure adaptive module are specifically described.
[0029] like Figure 1 and Figure 2 As shown, in the embodiment, the module body 1 is formed by stacking multiple battery cells 101. The battery cell 101 is an existing component commonly used in solid-state batteries. Its connection method and specific structure are not described here in detail, and those skilled in the art can know it.
[0030] The two ends of the module body 1 are provided with a pressure adaptive component 2, a pressure uniformity adjustment component 3 and a base 4. The pressure uniformity adjustment component 3 is provided at both ends of the module body 1. The pressure uniformity adjustment component 3 can adjust the equivalent compression modulus of different regions, thereby adjusting the pressure uniformity. The pressure uniformity adjustment component 3 is connected to the base 4 through the pressure adaptive component 2, and the package pressurizing component 5 is provided with the module body 1, the pressure adaptive component 2, the pressure uniformity adjustment component 3 and the base 4. Specifically, in Figure 1 In the figure, arranged from left to right are a base 4, a pressure adaptive component 2, a pressure uniformity adjustment component 3, a module body 1, another pressure uniformity adjustment component 3, another pressure adaptive component 2 and another base 4. The packaging and pressurizing component 5 packages and presses these components to complete the assembly of the pressure adaptive module.
[0031] The pressure adaptive module can adaptively adjust the module pressure through the cooperation of the module body 1, the pressure adaptive component 2, the pressure uniformity adjustment component 3, the base 4 and the packaging pressurizing component 5, thereby solving the problem of stratification and gaps on the contact interface with the solid electrolyte in the all-solid-state battery due to the deformation of the electrode during the cycle; the pressure uniformity of the module body 1 is adjusted by the pressure uniformity adjustment component 3 to ensure that the maximum pressure and minimum pressure of the battery cell 101 are within an appropriate range; the pressure adaptive component 2 can ensure sufficient pressure and can adaptively adjust the pressure according to different operating conditions, ensuring the total pressure, maximum pressure and minimum pressure of the battery cell 101 when the thickness of the battery cell 101 changes under different SOC (State of Charge) and different temperature environments; in addition, the pressure can also be adjusted by the pressure adaptive component 2 when the pressure adaptive module is assembled and repaired. The pressure adaptive module has a compact overall structure and a tight layout, which can ensure the continuous stability of the solid-solid interface, effectively guaranteeing the performance and life of the assembled batteries, and ensuring that the pressure and pressure uniformity of the all-solid-state battery module are maintained within the optimal range.
[0032] Preferably, if Figure 1 and Figure 2 As shown, in this embodiment, battery cells 101 are grouped in pairs to form a battery cell group, and buffer members 102 are provided at both ends of the battery cell group. Buffer members 102 are used to protect battery cells 101, providing thermal insulation and buffering protection. Buffer members 102 can be made of materials such as PU foam, EVA foam, PE foam, and silicone foam.
[0033] Preferably, if Figure 4As shown, in an embodiment, the pressure adaptive component 2 may include a pneumatic bag 201 and a limit protection frame 202. The number of pneumatic bags 201 may be multiple, and may be specifically selected according to the needs of the user and the specifications of the module. In an embodiment, two pneumatic bags 201 are arranged side by side inside the limit protection frame 202. The pneumatic bag 201 may use an airbag in the prior art, which is inflated to achieve pressurization or decompression. In an embodiment, a plurality of pneumatic bags 201 form an airbag array, and the working air pressure of the airbag array is in the range of 2-15MPa, and can be adjusted within this range as needed. When the module is assembled and reworked, the pressure of the battery cell 101 is adjusted and compensated by adjusting the working pressure to produce local deformation.
[0034] Furthermore, the pneumatic bladder 201 is disposed within a position-limiting protective frame 202, with its two side surfaces respectively abutting the base 4 and the pressure uniformity adjustment assembly 3. The position-limiting protective frame 202 can be formed as a square frame to enclose the pneumatic bladder 201. The position-limiting protective frame 202 can position the pneumatic bladder 201 and also provide protection for the pneumatic bladder 201.
[0035] Preferably, if Figure 5 and Figure 6 As shown, in an embodiment, the pressure uniformity adjustment component 3 may include a pressure equalizing plate 301 and a memory alloy bracket 302. The pressure equalizing plate 301 abuts the module body 1. A plurality of pressure equalizing cavities 306 spaced apart from each other are provided in the middle of the pressure equalizing plate 301. The memory alloy bracket 302 is disposed in the pressure equalizing cavity 306. The memory alloy bracket 302 includes a support portion 303 for abutting against the four walls of the pressure equalizing cavity 306. The pressure equalizing plate 301 has multiple memory alloy brackets 302 disposed therein. During the module offline and subsequent operation, by energizing the memory alloy bracket 302 embedded in the pressure equalizing cavity 306, the equivalent compression modulus of different areas of the pressure equalizing plate 301 can be adjusted by controlling the stretch ratio of the memory alloy bracket 302, thereby adjusting the pressure uniformity. The memory alloy bracket 302 can be, for example, a memory alloy in the prior art, such as a nickel-titanium alloy.
[0036] Preferably, if Figure 5 and Figure 6As shown, in an embodiment, the pressure uniformity adjustment component 3 may further include a pressure collection sheet 304 and an insulating sheet 305. The insulating sheet 305 is arranged between the module body 1 and the equalizing plate 301, and the pressure collection sheet 304 is arranged on the other end face of the equalizing plate 301 to which the insulating sheet 305 is arranged. The two end faces of the equalizing plate 301 facing and facing away from the module body 1 are respectively provided with an insulating sheet 305 and a pressure collection sheet 304. The insulating sheet 305 can ensure electrical isolation between the battery cell 101 and the equalizing plate 301. The pressure of the module body 1 is collected by the pressure collection sheet 304, and the pressure data collected by the pressure collection sheet 304 is fed back to the operator. Based on the feedback data, the operator energizes the memory alloy bracket 302 to control the extension ratio of the memory alloy bracket 302.
[0037] Furthermore, the memory alloy support 302 includes four supporting parts 303 , and the four supporting parts 303 can respectively abut against four inner walls of the pressure equalizing chamber 306 . The pressure uniformity can be adjusted more effectively through the four supporting parts 303 .
[0038] Preferably, if Figure 1 and Figure 7 As shown, in an embodiment, the base 4 may include a stopper 401 and connection blocks 402 located at both ends of the stopper 401. When the packaging and pressurizing assembly 5 is mounted on the packaging and pressurizing assembly 5, the packaging and pressurizing assembly 5 abuts the connection blocks 402, and the sides of the packaging and pressurizing assembly 5 abut the stopper 401. The base 4 can be simultaneously attached to the pressure uniformity adjustment assembly 3 and the packaging and pressurizing assembly 5, providing main body support, and the position of the packaging and pressurizing assembly 5 is limited by the stopper 401.
[0039] Preferably, if Figure 1 As shown, in the embodiment, the number of the packaging and pressurizing components 5 corresponds to the number of the connecting blocks 402. Since in the embodiment, the number of the packaging and pressurizing components 5 is two, the number of the connecting blocks 402 is also two.
[0040] Preferably, if Figure 1 、 Figure 3 and Figure 8 As shown, in the embodiment, in order to be able to better adjust the module pressure and better achieve the pressurizing effect of the packaging pressurizing component 5, the middle part of the base 4 protrudes in the direction away from the module body 1 to form a protruding block 403, and the packaging pressurizing component 5 may include a bending structure 501 corresponding to the protruding block 403.
[0041] Preferably, if Figure 1 and Figure 3As shown, in an embodiment, the package pressurizing assembly 5 may include a package body and a memory alloy sheet 502. The memory alloy sheet 502 is provided on the side of the package body facing away from the module body 1. The memory alloy sheet 502 may include a plurality of bending portions 503, and the plurality of bending portions 503 are bent in a direction away from the module body 1. The package body may be formed into a structure approximately in the shape of a square frame, which can be sleeved on both ends of the pressure adaptive module. The package body may be composed of a carbon fiber reinforced composite material. The memory alloy sheet 502 may also be a memory metal such as nickel-titanium alloy in the prior art. By electrifying and heating the memory alloy sheet 502 and then controlling the shrinkage ratio, closed-loop control of temperature and preload force may be achieved.
[0042] Preferably, if Figure 1 and Figure 3 As shown, in this embodiment, the side of the package body facing away from the module body 1 is the outer side, and the side of the package body facing the module body 1 is the inner side. The surface of the inner side is provided with a powder coating 504. The powder coating 504 is sprayed on the inner side for insulation protection. The powder coating 504 can be an insulating coating commonly used in batteries.
[0043] The working mechanism of the pressure adaptive module under different working conditions is as follows: During the module assembly stage (normal temperature, low SOC): the pneumatic bag 201 is inflated to 5MPa to achieve preliminary positioning, the pressure uniformity adjustment component 3 works to adjust the pressure uniformity of the module body 1 to 40%, and after the module is assembled, the packaging pressurizing component 5 is used to ensure that the total pressure between the packaging pressurizing component 5 and the base 4 is maintained within a suitable range. The packaging pressurizing component 5 can adjust the total pressure, maximum pressure and minimum pressure between the battery cell 101 and the buffer component 102 under different SOCs, different temperature environments and unused operating conditions; the pressure uniformity adjustment component 3 is used to ensure that the maximum pressure and minimum pressure of the battery cell 101 and the buffer component 102 are within a certain range; when the buffer component 102 is aged and deformed and the battery cell 101 is in the middle and late stages of its life, the pressure adaptive component 2 can adaptively adjust the total pressure, maximum pressure and minimum pressure between the battery cell 101 and the buffer component 102; Under high temperature conditions: When the NTC test temperature is greater than 60°C, a pulse current is passed through the memory alloy (memory alloy bracket 302 and memory alloy sheet 502), and the alloy resistance is adjusted to a critical value (triggering a 0.5Hz pulse current), and the extension is restored under high temperature; Under charging conditions: when the SOC is higher than 50%, a pulse current is passed through the memory alloy, and the alloy resistance is adjusted to a critical value (triggering a 0.5Hz pulse current), and the extension is restored under high temperature; Under the repair condition: the working pressure of the pneumatic bag 201 drops below 2MPa. After the faulty battery cell 101 is removed, the working pressure of the pneumatic bag 201 is restored to the state before the repair and the pressure uniformity adjustment is completed at the same time.
[0044] The adaptive pressure module, comprised of a module body, a pressure adaptive assembly, a pressure uniformity adjustment assembly, a base, and a package pressurization assembly, adaptively adjusts module pressure. This solves the problem of delamination and voids at the interface between the electrode and the solid electrolyte, which can occur during cycling in all-solid-state batteries. The pressure uniformity adjustment assembly maintains pressure uniformity within the module body, ensuring that the maximum and minimum pressures of the battery cells are within appropriate ranges. The adaptive pressure assembly ensures sufficient pressure and adaptively adjusts pressure according to different operating conditions, maintaining the total pressure, maximum pressure, and minimum pressure of the battery cells under varying SOC (State of Charge) and temperature conditions, even when the cell thickness varies. Furthermore, the adaptive pressure assembly allows for pressure adjustment during assembly and repair. The module's compact structure and tight layout ensure continuous stability of the solid-solid interface, effectively guaranteeing the performance and life of the assembled battery, and ensuring that the pressure and pressure uniformity of the all-solid-state battery module remain within the optimal range.
[0045] In addition, according to a second aspect of the present invention, a battery pack is provided, which includes the pressure adaptive module as described above.
[0046] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.
Claims
1. A pressure adaptive module, characterized in that: The pressure adaptive module includes a module body formed by stacking multiple battery cells, a pressure adaptive component, a pressure uniformity adjustment component, a base and a packaging pressurization component. The pressure uniformity adjustment component is arranged at both ends of the module body, the pressure uniformity adjustment component is connected to the base through the pressure adaptive component, and the packaging pressurization component is sleeved on the module body, the pressure adaptive component, the pressure uniformity adjustment component and the base.
2. The pressure adaptive module according to claim 1, characterized in that: The battery cells are grouped in pairs to form a battery cell group, and buffer components are provided at both ends of the battery cell group.
3. The pressure adaptive module according to claim 1, characterized in that: The pressure adaptive component includes a pneumatic bag and a position limiting protection frame. The pneumatic bag is arranged inside the position limiting protection frame. The two side surfaces of the pneumatic bag respectively abut against the base and the pressure uniformity adjustment component.
4. The pressure adaptive module according to claim 1, characterized in that: The pressure uniformity adjustment component includes a pressure equalizing plate and a memory alloy bracket. The pressure equalizing plate abuts the module body. A plurality of pressure equalizing cavities spaced apart from each other are opened in the middle of the pressure equalizing plate. The memory alloy bracket is arranged in the pressure equalizing cavity. The memory alloy bracket includes a support portion for abutting the four walls of the pressure equalizing cavity.
5. The pressure adaptive module according to claim 4, characterized in that: The pressure uniformity adjustment component also includes a pressure collection piece and an insulating piece. The insulating piece is arranged between the module body and the pressure equalizing plate. The pressure collection piece is arranged on the other end face of the pressure equalizing plate where the insulating piece is arranged.
6. The pressure adaptive module according to claim 1, characterized in that: The base includes a limit block and connection blocks located at both ends of the limit block. When the packaging pressurizing assembly is sleeved on the base, the packaging pressurizing assembly abuts the connection blocks, and the side of the packaging pressurizing assembly abuts the limit blocks.
7. The pressure adaptive module according to claim 6, characterized in that: The number of the packaging and pressurizing components corresponds one to one to the number of the connecting blocks.
8. The pressure adaptive module according to claim 1, wherein: The middle portion of the base protrudes in a direction away from the module body to form a protruding block, and the packaging pressurizing component includes a bending structure corresponding to the protruding block.
9. The pressure adaptive module according to claim 1, characterized in that: The packaging and pressurizing assembly includes a packaging body and a memory alloy sheet, wherein the memory alloy sheet is arranged on a side of the packaging body facing away from the module body, and the memory alloy sheet includes a plurality of bent portions, wherein the plurality of bent portions are bent in a direction away from the module body; and / or The side of the package body facing away from the module body is the outer side, and the side of the package body facing the module body is the inner side. The surface of the inner side is provided with a powder coating.
10. A battery pack, characterized in that: The battery pack includes the pressure adaptive module according to any one of claims 1 to 9.