Battery cell group, battery system, and vehicle

Abstract

The utility model relates to a kind of electric core group, battery system and vehicle, wherein, the electric core group includes: the electric core of multiple electric core, at least one magnetic control force applying member, and the pressure detection assembly associated with each magnetic control force applying member;Wherein, each magnetic control force applying member, be located in the electric core gap of adjacent two electric core, for to the electric core set associated with magnetic control force applying member Apply pressure;The electric core set associated with magnetic control force applying member at least includes adjacent two electric core;The pressure detection assembly associated with each magnetic control force applying member includes at least one pressure detection unit;Each pressure detection unit is located in the electric core set associated with magnetic control force applying member;The pressure detection assembly associated with each magnetic control force applying member, for collecting the pressure related data related to magnetic control force applying member, to control the pressure of magnetic control force applying member according to pressure related data The electric core set associated with magnetic control force applying member is added by magnetic control force applying member, so that the pressure state of each place in battery can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery cell pack, a battery system, and a vehicle. Background Technology

[0002] Solid-state batteries employ a solid-solid contact interface, requiring appropriate externally applied stacking pressure to maintain a tight interface adhesion. This ensures unobstructed ion conduction pathways and reduces interfacial impedance. Simultaneously, during charging and discharging, the volume expansion and contraction of the electrode materials also rely on external pressure to constrain these processes, maintaining the consistency and stability of the cell structure and preventing uneven pressure distribution that could lead to casing deformation. Therefore, pressure management is crucial for the performance and lifespan of solid-state batteries.

[0003] In existing technologies, spring assemblies are typically placed at both ends of the battery module to provide initial preload and passively absorb overall expansion displacement. However, this method cannot regulate the pressure state at various points inside the battery.

[0004] There is currently no effective solution to the problem that the pressure state at various points inside the battery cannot be adjusted in related technologies. Utility Model Content

[0005] Therefore, it is necessary to provide a cell pack, battery system, and vehicle to address the problem that existing technologies cannot regulate the pressure state at various points inside the battery.

[0006] In a first aspect, this utility model provides a battery cell assembly, the battery cell assembly comprising a plurality of stacked battery cells, at least one magnetically controlled force application element, and a pressure detection component associated with each of the magnetically controlled force application elements; wherein,

[0007] Each of the magnetically controlled force-applying elements is disposed within the cell gap between two adjacent cells, for applying pressure to the cell set associated with the magnetically controlled force-applying element; wherein the cell set associated with the magnetically controlled force-applying element includes at least the two adjacent cells;

[0008] Each of the magnetically controlled force-applying components is associated with a pressure detection assembly, which includes at least one pressure detection unit. Each pressure detection unit is located within the cell set associated with the magnetically controlled force-applying component. The pressure detection assembly associated with each magnetically controlled force-applying component is used to collect pressure-related data related to the magnetically controlled force-applying component, so as to control the pressure applied by the magnetically controlled force-applying component to the cell set associated with the magnetically controlled force-applying component based on the pressure-related data.

[0009] In some embodiments, the magneto-controlled force application component includes a first magnetic component, an elastomer, and a second magnetic component stacked in sequence.

[0010] In some embodiments, the first magnetic component is an electromagnet; the second magnetic component is an electromagnet or a permanent magnet.

[0011] In some embodiments, the pressure detection unit is a thin-film pressure sensor, and the pressure detection unit is located within the cell gaps of the cell assembly associated with the magnetically controlled force application element.

[0012] In some embodiments, the magnetically controlled force application element and the pressure detection component associated with the magnetically controlled force application element are located within the same cell gap.

[0013] In some embodiments, the magnetically controlled force application element and the pressure detection component associated with the magnetically controlled force application element are located in different cell gaps.

[0014] In some embodiments, multiple pressure detection units are provided within the same cell gap, and the multiple pressure detection units are distributed in different areas within the same cell gap.

[0015] In some of these embodiments, the elastomer is made of rubber, silicone, or polyetheretherketone (PEEK) material.

[0016] Secondly, this utility model provides a battery system, which includes the battery cell pack described in the first aspect above, and a controller; wherein,

[0017] The controller is used to acquire pressure-related data related to the magnetically controlled force application device in the battery cell group, and control the pressure applied by the magnetically controlled force application device to the battery cell group associated with the magnetically controlled force application device according to the pressure-related data.

[0018] Thirdly, the present invention provides a vehicle that includes the battery system described in the second aspect above.

[0019] Compared with related technologies, this utility model provides a cell pack, a battery system, and a vehicle. The cell pack includes multiple stacked cells, at least one magnetically controlled force applicator, and a pressure detection component associated with each magnetically controlled force applicator. Each magnetically controlled force applicator is disposed within the cell gap between two adjacent cells and is used to apply pressure to the cell set associated with the magnetically controlled force applicator. The cell set associated with the magnetically controlled force applicator includes at least two adjacent cells. The pressure detection component associated with each magnetically controlled force applicator includes at least one pressure detection unit. Each pressure detection unit is disposed within the cell set associated with the magnetically controlled force applicator. The pressure detection component associated with each magnetically controlled force applicator is used to collect pressure-related data related to the magnetically controlled force applicator to control the pressure applied by the magnetically controlled force applicator to the cell set associated with the magnetically controlled force applicator based on the pressure-related data.

[0020] In this way, through the coordinated operation of the magnetically controlled force application component and the pressure detection component, distributed active regulation of the internal pressure of the cell assembly is achieved. Specifically, the magnetically controlled force application component is located within the gaps between the cells, enabling direct pressure application to localized areas of the cell assembly without relying on end plates to transmit force throughout the entire cell stack. This effectively solves the problem of pressure loss in the middle caused by accumulated stacking tolerances in long-distance force transmission paths. Simultaneously, the pressure detection component collects pressure-related data from each cell assembly in real time, allowing each magnetically controlled force application component to precisely apply pressure based on the actual stress state of its associated cell. This enables fine-grained independent regulation of each cell assembly to adjust the pressure state at various points within the battery.

[0021] Details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects and advantages of the present application more readily apparent. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a battery cell assembly provided by this utility model;

[0023] Figure 2 This is a schematic diagram of the arrangement of magnetically controlled force-applying components provided by this utility model;

[0024] Figure 3 This is a schematic diagram of the arrangement of a pressure detection unit provided by this utility model;

[0025] Figure 4 This is a schematic diagram of another arrangement of pressure detection units provided by this utility model;

[0026] Figure 5 This is a structural schematic diagram of a magnetically controlled force application component provided by this utility model;

[0027] Figure 6 This is a schematic diagram of another magnetically controlled force application component provided by this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of a battery cell system provided by this utility model.

[0029] Reference numerals: 1. Battery cell assembly; 11. Battery cell; 12. Magnetically controlled force application component; 121. First magnetic component; 122. Elastomer; 123. Second magnetic component; 13. Pressure detection unit; 2. Controller. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please see Figures 1 to 7 , Figure 1 A schematic diagram of the structure of a battery cell assembly provided by this utility model is shown. Figure 2 This diagram illustrates the arrangement of a magnetically controlled force-applying component provided by this invention. Figure 3 A schematic diagram of the arrangement of a pressure detection unit provided by this utility model is shown. Figure 4 A schematic diagram of another arrangement of pressure detection units provided by this utility model is shown. Figure 5 A schematic diagram of the structure of a magnetically controlled force application component provided by this utility model is shown. Figure 6 A schematic diagram of another magnetic force application component provided by this utility model is shown. Figure 7 A schematic diagram of the structure of a battery cell system provided by this utility model is shown.

[0034] This embodiment provides a battery cell assembly 1, including: a plurality of battery cells 11 stacked together, at least one magnetically controlled force application element 12, and a pressure detection component associated with each magnetically controlled force application element 12.

[0035] Each magnetically controlled force-applying element 12 is disposed within the cell gap between two adjacent cells 11, and is used to apply pressure to the cell set associated with the magnetically controlled force-applying element 12; wherein the cell set associated with the magnetically controlled force-applying element 12 includes at least two adjacent cells 11.

[0036] Each magnetically controlled force-applying component 12 is associated with a pressure detection assembly including at least one pressure detection unit 13; each pressure detection unit 13 is disposed within the cell assembly associated with the magnetically controlled force-applying component 12; wherein, each magnetically controlled force-applying component 12 is associated with a pressure detection assembly for collecting pressure-related data related to the magnetically controlled force-applying component 12, so as to control the pressure applied by the magnetically controlled force-applying component 12 to the cell assembly associated with the magnetically controlled force-applying component 12 according to the pressure-related data.

[0037] For details, please refer to Figure 1 and Figure 2 Multiple battery cells 11 are stacked sequentially along a predetermined direction (e.g., the thickness direction of the battery cells 11), with gaps between adjacent battery cells 11. Magnetically controlled force application elements 12 are disposed within the gaps between the battery cells in the battery cell assembly, and there can be one or more of them. When multiple magnetically controlled force application elements 12 are provided, they are spaced apart along the stacking direction; for example, they can be disposed within some or all of the battery cell gaps to achieve segmented pressure control in different regions of the battery cell assembly 1.

[0038] Each magnetically controlled force application element 12 may be associated with two adjacent cells 11 (e.g., ...). Figure 2 As shown in cell set A), it can also be expanded according to actual pressure management needs. For example, the cell set associated with each magnetically controlled force application element 12 includes two cells 11 adjacent to the magnetically controlled force application element 12 and more cells located outside the two cells 11 (such as...). Figure 2 As shown in cell set B), the number of cells covered by the cell set is two or more. This embodiment does not make a specific limitation on this.

[0039] It should be noted that the magnetically controlled force application component 12 is used to apply pressure to the cell assembly associated with it. The magnitude of the pressure applied to the cell assembly can be adjusted in real time according to the input control signal. This embodiment does not limit the specific implementation of the magnetically controlled force application component 12. For example, the magnetically controlled force application component 12 can be a magnetostrictive component. The pressure detection component serves as a feedback unit and works in conjunction with the magnetically controlled force application component 12.

[0040] Each magnetically controlled force application element 12 is associated with a pressure detection assembly including at least one pressure detection unit 13. This pressure detection unit 13 can be disposed at any suitable location within the cell assembly associated with the magnetically controlled force application element 12, including but not limited to being disposed between the opposing surfaces of two adjacent cells 11 (e.g., ...). Figure 3 As shown), at the contact surface between the magnetic force application component 12 and the battery cell 11 (such as... Figure 4(as shown), or embedded in the battery cell 11. For example, the pressure detection unit 13 can be a fiber Bragg grating (FBG) sensor. In this case, the pressure detection unit 13 is embedded in the battery cell 11, and the pressure change of the battery cell 11 can be obtained by monitoring the Bragg wavelength drift of the FBG sensor.

[0041] The pressure detection unit 13 is used to collect pressure-related data associated with the magnetically controlled force application component 12. This pressure-related data characterizes the current stress state of the battery cell assembly. When each magnetically controlled force application component 12 is associated with multiple pressure detection units 13, the pressure data collected by these multiple units can be fused to determine the final pressure-related data. For example, the detected values ​​output by multiple pressure detection units 13 can be weighted or arithmetically averaged, and the result can be used as the pressure-related data corresponding to the battery cell assembly associated with the magnetically controlled force application component 12.

[0042] It should be understood that the same pressure detection unit 13 can simultaneously serve as a pressure detection unit 13 associated with multiple magnetically controlled force application elements 12, used to assist in the pressure regulation of multiple magnetically controlled force application elements 12. For example, when multiple magnetically controlled force application elements 12 are spaced apart along the stacking direction and are relatively close to each other, the cell sets associated with adjacent magnetically controlled force application elements 12 may overlap in space or have intersecting force transmission paths. In this case, a pressure detection unit 13 can be set in a suitable position within the cell gap shared by multiple magnetically controlled force application elements 12 or within the cell set.

[0043] Furthermore, in one possible implementation, the actual arrangement positions of the pressure detection unit 13 and the magnetically controlled force application component 12 within the cell assembly 1 can be determined based on the pressure distribution characteristics of the battery under actual operating conditions. Specifically, the battery pack undergoes high and low temperature operation, charging and discharging, and vibration shock tests sequentially according to standard testing requirements, and the pressure data of each cell is recorded during the tests. Weights are assigned to each test (e.g., high temperature condition weight W1, low temperature condition weight W2, charging condition weight W3, discharging condition weight W4, vibration condition weight W5, etc.), and the cells with the highest and lowest pressures are identified in each test. Subsequently, the cells with the recorded extreme pressure values ​​in each test are assigned values ​​according to their respective weights and sorted from highest to lowest weight. Based on the sorting results and the total number of cells in the cell assembly, the positions of the cells ranked higher are selected as the placement points for the pressure detection unit 13 and the magnetically controlled force application component 12. In this way, the pressure detection unit 13 and the magnetic force application component 12 can be preferentially arranged in the position in the cell assembly 1 where the stress state is most likely to deviate to the extreme, thereby achieving targeted pressure monitoring and active control.

[0044] In practice, the pressure-related data collected in real time by the pressure detection component is transmitted to the controller after signal conversion and processing. The controller outputs corresponding control commands to adjust the pressure applied by each magnetic force application component 12 to its respective associated cell assembly, thereby realizing dynamic control of the internal pressure distribution of the cell assembly 1.

[0045] The battery cell assembly provided in this embodiment includes multiple stacked battery cells, at least one magnetically controlled force application element, and a pressure detection component associated with each magnetically controlled force application element. Each magnetically controlled force application element is disposed within the gap between two adjacent battery cells and is used to apply pressure to the battery cell set associated with the magnetically controlled force application element. The battery cell set associated with the magnetically controlled force application element includes at least two adjacent battery cells. The pressure detection component associated with each magnetically controlled force application element includes at least one pressure detection unit. Each pressure detection unit is disposed within the battery cell set associated with the magnetically controlled force application element. The pressure detection component associated with each magnetically controlled force application element is used to collect pressure-related data related to the magnetically controlled force application element, so as to control the pressure applied by the magnetically controlled force application element to the battery cell set associated with the magnetically controlled force application element based on the pressure-related data.

[0046] In this way, through the coordinated operation of the magnetically controlled force application component and the pressure detection component, distributed active regulation of the internal pressure of the cell assembly is achieved. Specifically, the magnetically controlled force application component is located within the gaps between the cells, enabling direct pressure application to localized areas of the cell assembly without relying on end plates to transmit force throughout the entire cell stack. This effectively solves the problem of pressure loss in the middle caused by accumulated stacking tolerances in long-distance force transmission paths. Simultaneously, the pressure detection component collects pressure-related data from each cell assembly in real time, allowing each magnetically controlled force application component to accurately apply pressure based on the actual stress state of its associated cell. This enables fine-grained independent regulation of each cell assembly to adjust the pressure state throughout the battery, preventing pressure imbalance and ensuring safe and reliable operation.

[0047] In some embodiments, the magnetically controlled force application element 12 includes a first magnetic component 121, an elastomer 122, and a second magnetic component 123 stacked in sequence.

[0048] It should be noted that the magnetically controlled force-applying component 12 can be a component capable of deforming under controlled conditions, and the pressure applied to the cell assembly can be adjusted in real time by controlling the deformation. In this embodiment, the magnetically controlled force-applying component 12 includes a first magnetic component 121, an elastic body 122, and a second magnetic component 123 stacked sequentially. The magnetically controlled force-applying component 12 is disposed entirely within the cell gap between two adjacent cells 11, and both ends of the magnetically controlled force-applying component 12 along the stacking direction contact the surface of the corresponding cell 11, for applying pressure to the cell assembly associated with it.

[0049] In a specific implementation, the first magnetic component 121 can be an electromagnet, and the second magnetic component 123 can be an electromagnet or a permanent magnet. (See also...) Figure 5 The first magnetic component 121 is an electromagnet, and the second magnetic component 123 is a permanent magnet. (See also...) Figure 6 Both the first magnetic component 121 and the second magnetic component 123 are electromagnets.

[0050] When current is applied to the first coil on the first magnetic component 121 and / or the second coil on the second magnetic component 123, a magnetic interaction (i.e., magnetic attraction or repulsion) is generated between the first magnetic component 121 and the second magnetic component 123. The magnitude and direction of this magnetic force can be precisely controlled by adjusting the magnitude and direction of the current applied to the first coil and / or the second coil. Taking the first magnetic component 121 and the second magnetic component 123 as electromagnets as an example: if the first coil and the second coil are supplied with current in the same direction, a magnetic attraction is generated between them, and the first magnetic component 121 and the second magnetic component 123 move closer to each other and compress the elastic body 122. The width of the magnetically controlled force-applying component 12 along the cell arrangement direction decreases, and the pressure applied to the cell assembly decreases accordingly. If the first coil and the second coil are supplied with current in opposite directions, a magnetic repulsion is generated between them, and the first magnetic component 121 and the second magnetic component 123 move further apart and stretch the elastic body 122. The width of the magnetically controlled force-applying component 12 along the cell arrangement direction increases, and the pressure applied to the cell assembly increases accordingly.

[0051] It should be noted that the direction of the current flowing through the first coil and / or the second coil can be adaptively adjusted according to the actual structure of the magnetic components (e.g., coil winding direction).

[0052] Furthermore, it should be understood that if the first magnetic component 121 is an electromagnet and the second magnetic component 123 is a permanent magnet, since the magnetic field direction of the second magnetic component 123 is fixed, the magnetic field direction of the first magnetic component 121 can be changed by adjusting the current direction of the first coil, thereby switching between the two states of attraction and repulsion, and thus achieving precise adjustment of the output pressure.

[0053] An elastomer 122 is sandwiched between the first magnetic component 121 and the second magnetic component 123. It can be made of materials with good elastic recovery capabilities, such as rubber, silicone, or polyetheretherketone (PEEK). The elastomer 122 absorbs and buffers sudden changes in magnetic force through its own deformation, ensuring smooth and controllable deformation of the magnetically controlled force-applying component 12. Simultaneously, when the magnetic force is eliminated or reduced, the elastomer 122 can assist the two magnetic components in returning to their initial state, ensuring that the magnetically controlled force-applying component 12 can maintain its basic support force even when not driven.

[0054] The controller 2 can output control commands based on the feedback signal from the pressure detection component. By adjusting the driving current of the first coil and / or the second coil, it drives the magnetically controlled force-applying component 12 to produce corresponding deformation, thereby changing the pressure applied to the battery cell assembly by the magnetically controlled force-applying component 12. Thus, through the coordinated operation of the magnetically controlled force-applying component 12 and the pressure detection component, dynamic control of the battery cell assembly pressure is achieved.

[0055] Furthermore, the magnetically controlled force application component 12 in this embodiment can switch between attraction and repulsion states, achieving bidirectional active force regulation. This bidirectional regulation mechanism enables the magnetically controlled force application component 12 to actively reduce the applied pressure when the internal pressure of the battery cell is too high, thereby effectively avoiding safety risks such as excessive compression and casing rupture caused by the rapid expansion of the battery cell under high-rate conditions such as fast charging, and significantly improving the safety of the battery system.

[0056] In some embodiments, the pressure detection unit 13 is a thin-film pressure sensor, and the pressure detection unit 13 is disposed in the cell gap within the cell assembly associated with the magnetic force application member 12.

[0057] See Figure 3 and Figure 4 The thin-film pressure sensor can be attached to the opposing surfaces of two adjacent battery cells 11, or it can be positioned at the contact interface between the magnetically controlled force-applying component 12 and the battery cell 11, or arranged at other suitable locations within the gap between the battery cells. The sensing surface of the thin-film pressure sensor is in direct contact with the surface of the battery cell 11, and it outputs a resistance signal (i.e., pressure-related data) that is inversely proportional to the magnitude of the contact pressure. The greater the contact pressure, the smaller the resistance value output by the thin-film pressure sensor; the smaller the contact pressure, the greater the resistance value output by the thin-film pressure sensor. Based on the real-time change of this resistance signal, the instantaneous state of the contact pressure within the gap between the battery cells can be accurately reflected.

[0058] When the cell 11 expands or contracts in volume due to charging and discharging, or when the output pressure of the magnetic force application element 12 changes, the contact pressure borne by the thin-film pressure sensor changes accordingly, and its output resistance signal also changes synchronously, which is used for subsequent pressure regulation decisions.

[0059] Thus, by placing the thin-film pressure sensor in the cell gap, the contact pressure in the cell gap can be monitored in real time, thereby providing real-time feedback data for the force applied by each magnetically controlled force-applying component 12.

[0060] In some embodiments, the magnetic force application element 12 and the pressure detection component associated with the magnetic force application element 12 are disposed within the same cell gap.

[0061] Specifically, for each magnetically controlled force application element 12, its associated pressure detection component is located within the same cell gap as the magnetically controlled force application element 12. That is, the pressure detection unit 13 and the magnetically controlled force application element 12 are spatially located in the same gap between two adjacent cells 11. In terms of specific arrangement, the pressure detection unit 13 can be attached to the facing surface of one side of the cell 11 in the cell gap, or it can be located between the contact interface between the magnetically controlled force application element 12 and the cell 11, or it can be arranged side by side with the magnetically controlled force application element 12 in the gap. This embodiment does not make specific limitations on this.

[0062] It should be noted that the magnetically controlled force application component 12 and the associated pressure detection unit 13 are located in the same cell gap, so that the pressure detection unit 13 can directly measure the contact pressure at the gap, ensuring that the collected pressure-related data can accurately reflect the actual stress state of the area associated with the magnetically controlled force application component 12.

[0063] In some embodiments, the magnetic force application element 12 and the pressure detection component associated with the magnetic force application element 12 are disposed in different cell gaps.

[0064] Specifically, for each magnetically controlled force-applying component 12, its associated pressure detection component is located in a different cell gap from the magnetically controlled force-applying component 12. That is, the gap where the pressure detection unit 13 is located is separated from the gap where the magnetically controlled force-applying component 12 is located by one or more cell spacings in the stacking direction of the cell group 1. In terms of specific arrangement, the pressure detection unit 13 can be located in a cell gap adjacent to the magnetically controlled force-applying component 12, or it can be located in a cell gap further away. This embodiment does not make a specific limitation on this. Such an arrangement can adapt to different cell group structural layouts. For example, when the space in the cell gap is limited and cannot accommodate both the magnetically controlled force-applying component 12 and the pressure detection unit 13 at the same time, the pressure detection unit 13 can be arranged in other available cell gaps.

[0065] It should be noted that, since the cells 11 of the cell group 1 are closely arranged in the stacking direction, the pressure applied by the magnetic force application element 12 will be transmitted between adjacent cells 11 along the stacking direction. Therefore, the pressure detection unit 13, which is set in other gaps, can also sense the pressure change caused by the magnetic force application element 12. As long as its placement position is within the force transmission path range of the cell group associated with the magnetic force application element 12, the relevant pressure-related data can be effectively collected.

[0066] Thus, by placing the magnetic force application element 12 and the pressure detection unit 13 in different cell gaps, it helps to improve the flexibility of the internal structural layout of the cell assembly 1, while ensuring the accuracy and reliability of the pressure detection data.

[0067] In some embodiments, multiple pressure detection units 13 are provided within the same cell gap, and the multiple pressure detection units 13 are distributed in different regions within the same cell gap.

[0068] In this embodiment, multiple pressure detection units 13 can be arranged in the central and edge areas of the surface of the battery cell 11, or in the four corner areas of the surface of the battery cell 11, or distributed at intervals along the length or width of the battery cell 11, or simultaneously covering multiple key detection points on the surface of the battery cell 11. The arrangement of multiple pressure detection units 13 is not specifically limited.

[0069] It should be noted that by setting multiple pressure detection units 13 distributed at different positions within a single cell gap, local pressure data at different areas within the gap can be obtained, thereby reflecting the pressure distribution on the surface of the cell 11 on the plane of the gap.

[0070] In practice, the pressure values ​​output by multiple pressure detection units 13 within the same cell gap can be weighted and averaged. The weighted average result can be used as the pressure-related data corresponding to that cell gap. The weight of each pressure detection unit 13 can be preset according to the importance of its location. Alternatively, the average value of the output values ​​of multiple pressure detection units 13 can be used as the pressure-related data corresponding to that cell gap.

[0071] Thus, by distributing multiple pressure detection units 13 within the same cell gap, more accurate force information is provided for the pressure regulation of the magnetically controlled force application component 12, enabling the output adjustment of the magnetically controlled force application component 12 to take into account the differences in different areas within the gap, thereby helping to improve the accuracy of internal pressure control of the cell assembly 1.

[0072] This embodiment also provides a battery system. See below. Figure 7 The battery system includes the cell pack 1 and the controller 2 in any of the above embodiments.

[0073] The controller 2 is used to acquire pressure-related data related to the magnetic force application component 12 in the cell group 1, and control the pressure applied by the magnetic force application component 12 to the cell group associated with the magnetic force application component 12 according to the pressure-related data.

[0074] Specifically, the controller 2 is connected to the magnetically controlled force application element 12 and the pressure detection unit 13 associated with the magnetically controlled force application element 12. The controller 2 outputs corresponding control commands based on the pressure-related data of the magnetically controlled force application element 12 to adjust the pressure applied by each magnetically controlled force application element 12 to its respective associated cell assembly, thereby realizing dynamic control of the internal pressure distribution of the cell assembly 1.

[0075] For example, the pressure-related data of the magnetically controlled force application element 12 is transmitted to the controller 2 after signal conversion and processing. The controller 2 outputs corresponding control commands to the driver in the battery system, so that the driver adjusts the driving current input to the first coil and / or the second coil after receiving the control command, thereby driving the magnetically controlled force application element 12 to produce corresponding deformation, thereby changing the pressure applied by the magnetically controlled force application element 12 to the cell assembly.

[0076] It should be noted that in practical applications, battery systems can be used in electric vehicles, energy storage power stations, portable electronic devices, etc., and their specific form can be a battery module or a battery pack. Furthermore, those skilled in the art can make adaptive adjustments to the structural layout and control logic of the battery system according to actual needs, and this embodiment does not impose specific limitations in this regard.

[0077] This embodiment also provides a vehicle that includes the above-described battery system.

[0078] The vehicle can be an electric vehicle, and the battery system can be the power battery system in the vehicle.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery cell assembly (1), characterized in that, The battery cell assembly (1) includes a plurality of stacked battery cells (11), at least one magnetically controlled force application element (12), and a pressure detection component associated with each of the magnetically controlled force application elements (12); wherein, Each of the magnetically controlled force-applying elements (12) is disposed in the cell gap between two adjacent cells (11) for applying pressure to the cell set associated with the magnetically controlled force-applying element (12); wherein the cell set associated with the magnetically controlled force-applying element (12) includes at least the two adjacent cells (11). Each of the magnetically controlled force application elements (12) is associated with a pressure detection component including at least one pressure detection unit (13); each pressure detection unit (13) is located within the cell set associated with the magnetically controlled force application element (12); wherein, each of the magnetically controlled force application elements (12) is associated with a pressure detection component for collecting pressure-related data related to the magnetically controlled force application element (12) in order to control the pressure applied by the magnetically controlled force application element (12) to the cell set associated with the magnetically controlled force application element (12) according to the pressure-related data.

2. The battery cell assembly (1) according to claim 1, characterized in that, The magnetic force application component (12) includes a first magnetic component (121), an elastomer (122), and a second magnetic component (123) stacked in sequence.

3. The battery cell assembly (1) according to claim 2, characterized in that, The first magnetic component (121) is an electromagnet; the second magnetic component (123) is an electromagnet or a permanent magnet.

4. The battery cell assembly (1) according to claim 1, characterized in that, The pressure detection unit (13) is a thin-film pressure sensor, and the pressure detection unit (13) is located in the gap between the cells in the cell assembly associated with the magnetic force application element (12).

5. The cell assembly (1) according to claim 4, characterized in that, The magnetic force application element (12) and the pressure detection component associated with the magnetic force application element (12) are located in the same cell gap.

6. The battery cell assembly (1) according to claim 4, characterized in that, The magnetic force application element (12) and the pressure detection component associated with the magnetic force application element (12) are located in different cell gaps.

7. The battery cell assembly (1) according to claim 4, characterized in that, Multiple pressure detection units (13) are provided in the same cell gap, and the multiple pressure detection units (13) are distributed in different areas within the same cell gap.

8. The cell assembly (1) according to claim 2, characterized in that, The elastomer (122) is made of rubber, silicone or polyetheretherketone.

9. A battery system, characterized in that, The battery system includes a cell pack (1) as described in any one of claims 1 to 8, and a controller (2); wherein, The controller (2) is used to acquire pressure-related data related to the magnetic force application device (12) in the cell group (1), and control the pressure applied by the magnetic force application device (12) to the cell group associated with the magnetic force application device (12) according to the pressure-related data.

10. A vehicle, characterized in that, The vehicle includes the battery system as described in claim 9.

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