Battery measurement system and battery management system

Abstract

The present disclosure provides a battery measurement system that measures battery cells in a battery pack, wherein the battery pack includes two or more battery cells that are arranged with a predetermined spacing. The present disclosure also provides a battery management system.

Description

Technical Field

[0001] The present disclosure relates to a battery measurement system and a battery management system. Background Art

[0002] Lithium batteries are currently widely used in various aspects of industry and daily life. However, there are some problems with their use. For example, lithium batteries will deform when subjected to external forces and will bulge as they age. When lithium batteries malfunction, they can cause internal short circuits, fires, and explosions. Therefore, lithium battery safety testing is essential.

[0003] Lithium batteries are usually tested using pressure detection, which requires a separate pressure sensor, etc. Furthermore, other detection methods cannot accurately determine the location, range, area, type, etc. of the deformation.

[0004] The present disclosure proposes a more effective battery deformation detection method, which can be used to detect each battery in a battery pack and make judgments based on the detection signals. Summary of the Invention

[0005] In order to solve one of the above technical problems, the present disclosure provides a battery measurement system and a battery management system.

[0006] According to one aspect of the present disclosure, a battery measurement system in a battery pack is provided, wherein the battery pack includes two or more battery cells arranged with a predetermined spacing therebetween. The battery measurement system includes:

[0007] a capacitance sensing device, the capacitance sensing device comprising a first electrode plate and a second electrode plate, the first electrode plate being disposed on an outer surface, near, or inside one of adjacent battery cells, and the second electrode plate being disposed on an outer surface, near, or inside the other of the adjacent battery cells, wherein the first electrode plate and the second electrode plate are disposed in the predetermined space and face each other; and

[0008] A processing device processes the output signal of the first electrode plate and / or the second electrode plate to obtain a capacitance change between the first electrode plate and the second electrode plate generated when the distance between the first electrode plate and the second electrode plate changes due to deformation of the battery cell.

[0009] On, near, or inside an exterior surface.

[0010] According to the battery measuring system of at least one embodiment of the present disclosure, a first electrode plate and a second electrode plate are provided between every two adjacent batteries of two or more battery units.

[0011] According to at least one embodiment of the battery measuring system of the present disclosure, the number of the first electrode plates and the number of the second electrode plates are respectively two or more, and the two or more first electrode plates and the two or more second electrode plates are arranged in a one-to-one correspondence to form two or more capacitance sensing units, and the processing device respectively obtains the unit capacitance change values respectively formed by the two or more capacitance sensing units.

[0012] According to the battery measurement system of at least one embodiment of the present disclosure, the processing device includes a comparison unit, which is used to compare the capacitance change values of each of the cells and determine the deformation position, deformation amount, deformation range and / or deformation type of the battery based on the comparison result.

[0013] According to the battery measuring system of at least one embodiment of the present disclosure, the first electrode plate and / or the second electrode plate is / are the conductor for the one battery cell package and / or the conductor for the other battery cell package.

[0014] According to the battery measuring system of at least one embodiment of the present disclosure, the first electrode plate and / or the second electrode plate are conductors or conductive materials respectively arranged near or inside the outer surface of the one battery cell and / or near or inside the outer surface of the other battery cell.

[0015] According to the battery measuring system of at least one embodiment of the present disclosure, the first electrode plate and the second electrode plate are arranged in parallel.

[0016] The battery measuring system according to at least one embodiment of the present disclosure further includes an application device configured to apply an excitation to the first electrode plate and / or the second electrode plate.

[0017] According to the battery measurement system of at least one embodiment of the present disclosure, when the capacitance change exceeds a predetermined threshold, it is determined that the battery has a fault.

[0018] According to one aspect of the present disclosure, a battery management system includes the battery measurement system as described in any one of the above items, and the battery measurement system is used to measure the deformation of the battery cells in the battery pack.

[0019] According to another aspect of the present disclosure, the battery pack includes two or more battery cells, and the two or more battery cells are arranged with a predetermined space between them. The battery measurement system includes:

[0020] a capacitive sensing device comprising a first plate array and a second plate array; and

[0021] a processing device for processing output signals of the first plate array and / or the second plate array to obtain a capacitance change between the first plate array and the second plate array generated when a distance change between the first plate array and the second plate array is caused by deformation of the battery cell;

[0022] In which, the first electrode plate array includes more than two first electrode plates and the second electrode plate array includes more than two second electrode plates, the extension direction of the two or more first electrode plates is at a predetermined angle to the extension direction of the two or more second electrode plates, the first electrode plate array is arranged on the outer surface, near or inside of one battery cell of the adjacent battery cells, and the second electrode plate array is arranged on the outer surface, near or inside of the other battery cell of the adjacent battery cells, wherein the first electrode plate array and the second electrode plate array are arranged in the predetermined space and are arranged opposite to each other.

[0023] According to the battery measurement system of at least one embodiment of the present disclosure, a first electrode plate array and a second electrode plate array are provided between every two adjacent batteries of two or more battery units.

[0024] According to the battery measurement system of at least one embodiment of the present disclosure, the first electrode plate array and the second electrode plate array are arranged in parallel.

[0025] According to the battery measurement system of at least one embodiment of the present disclosure, the predetermined angle is 90 degrees.

[0026] According to at least one embodiment of the present disclosure, the battery measuring system further includes an application device for applying excitation to one or more of the two or more first plates in a time-sharing manner, and / or applying excitation to one or more of the two or more second plates in a time-sharing manner.

[0027] According to the battery measurement system of at least one embodiment of the present disclosure, the processing device obtains the capacitance changes measured based on each first electrode plate and / or second electrode plate after applying excitation to the first electrode plate and / or the second electrode plate at one time and at other times, compares the capacitance changes, and determines the deformation position, deformation amount, deformation range and / or deformation type of the battery based on the comparison results.

[0028] According to the battery measuring system of at least one embodiment of the present disclosure, the first electrode plate and / or the second electrode plate are conductors or conductive materials respectively arranged near or inside the outer surface of the one battery cell and / or near or inside the outer surface of the other battery cell.

[0029] According to the battery measurement system of at least one embodiment of the present disclosure, when the capacitance change exceeds a predetermined threshold, it is determined that the battery has a fault.

[0030] According to the battery measurement system of at least one embodiment of the present disclosure, when the capacitance changes measured according to each first electrode plate and / or according to each second electrode plate are consistent, it is considered that the battery cell is squeezed; when the capacitance changes measured according to each first electrode plate and / or according to each second electrode plate are inconsistent, it is considered that the battery cell is bulging.

[0031] According to another aspect of the present disclosure, a battery management system includes the battery measurement system as described in any one of the above items, and the battery measurement system is used to measure the deformation of the battery cells in the battery pack.

[0032] According to another aspect of the present disclosure, a battery measurement system in a battery pack includes two or more battery cells arranged with a predetermined spacing therebetween. The battery measurement system includes:

[0033] a capacitive sensing device, the capacitive sensing device comprising a first electrode plate, a second electrode plate, and an intermediate electrode plate; and

[0034] a processing device for processing output signals of the first electrode plate, the second electrode plate, and / or the intermediate electrode plate to obtain capacitance changes between the first electrode plate and the intermediate electrode plate, and / or between the second electrode plate and the intermediate electrode plate, generated when the distance between the first electrode plate and the intermediate electrode plate, and / or between the second electrode plate and the intermediate electrode plate changes due to deformation of the battery cell;

[0035] The first electrode plate is arranged on the outer surface, near or inside one of the adjacent battery cells, the second electrode plate is arranged on the outer surface, near or inside the other of the adjacent battery cells, the intermediate electrode plate is located between the first electrode plate and the second electrode plate, and the intermediate electrode plate is respectively arranged opposite to the first electrode plate and the second electrode plate in the predetermined space.

[0036] According to the battery measuring system of at least one embodiment of the present disclosure, a first electrode plate, a second electrode plate, and an intermediate electrode plate are provided between every two adjacent batteries of two or more battery units.

[0037] According to at least one embodiment of the battery measuring system of the present disclosure, the number of the first electrode plate, the second electrode plate, and the intermediate electrode plate is respectively two or more, and the two or more first electrode plates are provided in a one-to-one correspondence with the two or more intermediate electrode plates to form two or more first capacitance sensing units, and the two or more second electrode plates are provided in a one-to-one correspondence with the two or more intermediate electrode plates to form two or more second capacitance sensing units. The processing device respectively obtains the unit capacitance change values respectively formed by the two or more first capacitance sensing units and the two or more second capacitance sensing units.

[0038] According to the battery measurement system of at least one embodiment of the present disclosure, the processing device includes a comparison unit, which is used to compare the capacitance change values of each of the cells and determine the deformation position, deformation amount, deformation range and / or deformation type of the battery based on the comparison result.

[0039] According to the battery measuring system of at least one embodiment of the present disclosure, the first electrode plate and / or the second electrode plate is the conductor for the one battery cell package and / or the conductor for the other battery cell package, and the intermediate electrode plate is the conductor or conductive material arranged between the first electrode plate and the second electrode plate.

[0040] According to the battery measuring system of at least one embodiment of the present disclosure, the first electrode plate and / or the second electrode plate are conductors or conductive materials respectively arranged near or inside the outer surface of the one battery cell and / or near or inside the outer surface of the other battery cell, and the intermediate electrode plate is a conductor or conductive material arranged between the first electrode plate and the second electrode plate.

[0041] According to the battery measuring system of at least one embodiment of the present disclosure, the first electrode plate, the second electrode plate, and the intermediate electrode plate are arranged in parallel.

[0042] The battery measuring system according to at least one embodiment of the present disclosure further includes an application device configured to apply an excitation to the first electrode plate, the second electrode plate, and / or the intermediate electrode plate.

[0043] According to the battery measurement system of at least one embodiment of the present disclosure, when the capacitance change exceeds a predetermined threshold, it is determined that the battery has a fault.

[0044] According to the battery measuring system of at least one embodiment of the present disclosure, conductors or conductive materials are respectively provided on both sides of the intermediate plate, and the conductors or conductive materials on both sides are insulated.

[0045] According to yet another aspect of the present disclosure, a battery management system includes the battery measurement system described above, and the battery measurement system is used to measure deformation of battery cells in the battery pack.

[0046] According to another aspect of the present disclosure, a battery measurement system in a battery pack includes two or more battery cells arranged with a predetermined spacing therebetween. The battery measurement system includes:

[0047] a capacitive sensing device, the capacitive sensing device comprising a first plate array, a second plate array, and an intermediate plate array; and

[0048] a processing device for processing output signals of the first plate array, the second plate array, and / or the intermediate plate array to obtain capacitance changes generated when the distance between the first plate array and the intermediate plate array, and / or between the second plate array and the intermediate plate array, changes due to deformation of the battery cells.

[0049] In which, the first electrode plate array includes more than two first electrode plates, the second electrode plate array includes more than two second electrode plates, and the intermediate electrode plate array includes more than two intermediate electrode plates, the extension direction of the two or more first electrode plates is at a predetermined angle to the extension direction of the two or more intermediate electrode plates, the extension direction of the two or more second electrode plates is at a predetermined angle to the extension direction of the two or more intermediate electrode plates, the first electrode plate array is arranged on the outer surface, near or inside of one battery cell of the adjacent battery cells, the second electrode plate array is arranged on the outer surface, near or inside of the other battery cell of the adjacent battery cells, and the intermediate electrode plate array is arranged between the first electrode plate array and the second electrode plate array, wherein the first electrode plate array, the second electrode plate array and the intermediate electrode plate array are arranged in the predetermined space and are arranged opposite to each other.

[0050] According to the battery measurement system of at least one embodiment of the present disclosure, a first electrode plate array, a second electrode plate array, and an intermediate electrode plate array are provided between every two adjacent batteries of two or more battery units.

[0051] According to the battery measurement system of at least one embodiment of the present disclosure, the first electrode array, the second electrode array, and the intermediate electrode array are arranged in parallel.

[0052] According to the battery measurement system of at least one embodiment of the present disclosure, the predetermined angle is 90 degrees.

[0053] According to the battery measurement system of at least one embodiment of the present disclosure, conductors or conductive materials are respectively provided on both sides of the intermediate plate array, and the conductors or conductive materials on both sides are insulated.

[0054] According to at least one embodiment of the present disclosure, the battery measuring system further includes an application device, which is used to apply excitation to one or more of the two or more first plates in a time-sharing manner, apply excitation to one or more of the two or more second plates in a time-sharing manner, and / or apply excitation to one or more of the two or more intermediate plates in a time-sharing manner.

[0055] According to the battery measurement system of at least one embodiment of the present disclosure, the processing device obtains the capacitance changes measured based on each first electrode plate, second electrode plate and / or intermediate electrode plate after applying excitation to the first electrode plate, second electrode plate and / or intermediate electrode plate at one time and at other times, and compares the capacitance changes, and determines the deformation position, deformation amount, deformation range and / or deformation type of the battery based on the comparison result.

[0056] According to the battery measuring system of at least one embodiment of the present disclosure, the first electrode plate and / or the second electrode plate are conductors or conductive materials respectively arranged near or inside the outer surface of the one battery cell and / or near or inside the outer surface of the other battery cell.

[0057] According to the battery measurement system of at least one embodiment of the present disclosure, when the capacitance change exceeds a predetermined threshold, it is determined that the battery has a fault.

[0058] According to the battery measurement system of at least one embodiment of the present disclosure, when the capacitance change between each first electrode plate and each intermediate electrode plate, and / or the capacitance change between each second electrode plate and each intermediate electrode plate are consistent, the battery cell is considered to be squeezed; when the capacitance change between each first electrode plate and each intermediate electrode plate, and / or the capacitance change between each second electrode plate and each intermediate electrode plate are inconsistent, the battery cell is considered to be bulging.

[0059] According to yet another aspect of the present disclosure, a battery management system includes the battery measurement system described above, and the battery measurement system is used to measure deformation of battery cells in the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0061] Figure 1 A schematic diagram of a battery measurement system according to one embodiment of the present disclosure is shown.

[0062] Figure 2 A schematic diagram of a battery measurement system according to one embodiment of the present disclosure is shown.

[0063] Figure 3 A schematic diagram of a battery measurement system according to one embodiment of the present disclosure is shown.

[0064] Figure 4 A schematic diagram of a battery measurement system according to one embodiment of the present disclosure is shown.

[0065] Figure 5 A schematic diagram of a battery measurement system according to one embodiment of the present disclosure is shown.

[0066] Figure 6 A schematic diagram of a battery measurement system according to one embodiment of the present disclosure is shown.

[0067] Figure 7 A schematic diagram of a battery measurement system according to one embodiment of the present disclosure is shown.

[0068] Figure 8 A schematic diagram of a processing device of a battery measurement system according to one embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0069] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the relevant content and are not intended to limit the present disclosure. It should also be noted that, for ease of description, only the portions relevant to the present disclosure are shown in the accompanying drawings.

[0070] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure can be combined with each other. The technical solution of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0071] Unless otherwise stated, the exemplary embodiments / examples shown are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of the various embodiments / examples may be further combined, separated, interchanged, and / or rearranged without departing from the technical concepts of the present disclosure.

[0072] The use of cross hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise indicated, the presence or absence of cross hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the order described. In addition, the same figure numbers represent the same components.

[0073] When a component is referred to as being “on,” “over,” “connected to,” or “coupled to” another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another component, there are no intervening components present. For this purpose, the term “connected” may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0074] For descriptive purposes, the present disclosure may use spatially relative terms such as "below," "beneath," "under," "down," "above," "upper," "above," "higher," and "side (e.g., as in "sidewall")," to describe the relationship of one component to another (other) component as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the drawings is turned over, a component described as "below" or "beneath" another component or feature would then be positioned "above" the other component or feature. Thus, the exemplary term "below" can encompass both the "above" and "below" orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and as such, the spatially relative descriptors used herein should be interpreted accordingly.

[0075] The terms used herein are for the purpose of describing specific embodiments and are not intended to be restrictive. As used herein, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, the features, integral bodies, steps, operations, parts, assemblies and / or their groups stated are described, but the presence or addition of one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups is not excluded. It should also be noted that, as used herein, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, and as such, they are used to explain the inherent deviations of the processed values, calculated values and / or values provided that will be recognized by those of ordinary skill in the art.

[0076] According to one embodiment of the present disclosure, a battery measurement system in a battery pack is provided.

[0077] Figure 1 A battery measurement system in a battery pack according to a first aspect of the present disclosure is shown.

[0078] like Figure 1As shown, the battery pack 10 may include more than two battery cells. Figure 1 Three battery cells 110, 120 and 130 are shown, but it should be noted that other numbers of battery cells may also be used. The following description will take three battery cells as an example, but the principles are the same for other numbers of battery cells.

[0079] The three battery cells 110 , 120 , and 130 are arranged with predetermined spaces therebetween.

[0080] The battery measurement system may include a capacitive sensing device and a processing device.

[0081] The capacitive sensing device may include a first electrode plate 210 and a second electrode plate 220. The first electrode plate 210 is disposed on the outer surface, near, or inside one of the adjacent battery cells, and the second electrode plate is disposed on the outer surface, near, or inside the other of the adjacent battery cells. The first electrode plate 210 and the second electrode plate 220 are disposed in a predetermined space and face each other. A first electrode plate and a second electrode plate are disposed between every two adjacent batteries in a battery cell of two or more.

[0082] like Figure 1 As shown, a first electrode plate 210 may be provided on the outer surface of the first battery 110 , and a second electrode plate 220 may be provided on the outer surface of the second battery 120 correspondingly, a first electrode plate 210 may be provided on the outer surface of the other side of the second battery, and a second electrode plate 220 may be provided on the outer surface of the third battery 130 correspondingly.

[0083] The processing device 300 processes the output signals of the first electrode plate 210 and / or the second electrode plate 220 to obtain the capacitance change between the first electrode plate 210 and the second electrode plate 220 generated when the distance between the first electrode plate 210 and the second electrode plate 220 changes due to deformation of the battery cell.

[0084] Figure 2 A three-dimensional diagram of the battery pack is given. Figure 3 A schematic diagram of the battery after deformation is shown.

[0085] in Figure 3 The deformation shown is a battery cell bulging type deformation. Figure 4 shows a schematic diagram of the battery after deformation, where Figure 4 The deformation shown is the extrusion type deformation of the battery cell. Figure 4 The portion shown by the dotted line is the second electrode plate 220 and the second battery 120 that are displaced after being squeezed.

[0086] In the battery pack of the present disclosure, deformation of the battery cell causes deformation of the first electrode plate 210 and the second electrode plate 220. When the first electrode plate 210 and the second electrode plate 220 deform, the electrostatic capacitance between the first electrode plate 210 and the second electrode plate 220 also changes. Therefore, the deformation of the battery cell can be determined by measuring the change in capacitance.

[0087] According to further embodiments of the present disclosure, the number of first electrode plates 210 and second electrode plates 220 disposed on the outer surface of a battery may be two or more. The two or more first electrode plates 210 and the two or more second electrode plates 220 are disposed in a one-to-one correspondence and constitute two or more capacitive sensing units. The processing device obtains the unit capacitance change values formed by the two or more capacitive sensing units, respectively.

[0088] Figure 5 The embodiment of the present invention shows a case where multiple first and second electrode plates are provided. The number of the first and second electrode plates can be set according to actual conditions, and their shapes can be square, rectangular, circular, trapezoidal, diamond, triangular, T-shaped, interdigitated, polygonal, etc., which are not limited in this disclosure. In other embodiments / examples, the shapes of the electrode plates can also be the above shapes or any other shapes.

[0089] By providing multiple first and second electrode plates, taking the first battery cell 110 and the second battery cell 120 as an example for explanation, multiple first electrode plates 210 are provided on the outer surface of the first battery cell 110, and correspondingly, multiple second electrode plates 220 are also provided on the outer surface of the second battery cell 120. In this way, when the first battery cell 110 and / or the second battery cell 120 at the location of a first electrode plate 210 or a second electrode plate 220 is deformed, the static capacitance value generated by the first electrode plate 210 or the second electrode plate 220 will change. Therefore, by detecting the static capacitance value, the deformation of the first battery cell 110 and / or the second battery cell 120 can be obtained.

[0090] Because different first and second plates are located at different locations, the static capacitance values generated by each corresponding first and second plate may be different. For example, when a bulge-type fault occurs, the static capacitance of the first and second plates at the bulge location changes significantly, while the static capacitance of the first and second plates at the non-bulge location changes slightly.

[0091] Preferably, the first electrode plate and the second electrode plate are arranged in parallel.

[0092] For example, the processing device of the present disclosure may further include a comparison unit, which is used to compare the capacitance change values of each unit (each unit composed of the corresponding first electrode plate and the second electrode plate) and determine the deformation position, deformation amount, deformation range and / or deformation type of the battery based on the comparison results.

[0093] For example, when something like Figure 3 In the case of a bulge-type fault of the shape shown, the change in the electrostatic capacitance of the two middle first plates 210 and the second plate 220 will be greater than the change in the electrostatic capacitance of the two side first plates 210 and the second plate 220. Thus, by detecting the change in the electrostatic capacitance of the detection unit composed of each first plate 210 and the second plate 220, the location of the deformation can be obtained, and the type of deformation can also be obtained by the deformation location. For example, when the following occurs: Figure 4 In the case of the extrusion type fault shown, the change values of the electrostatic capacitance of each unit are roughly equal, so the fault can be defined as an extrusion type fault. In the case of large differences, the fault can be defined as a bulge type fault.

[0094] In one embodiment of the present disclosure, the conductive material used for the external packaging of each battery cell can be used as the first and second electrode plates. For example, battery cells are typically wrapped in aluminum foil, and the aluminum foil used for the wrapping can be used as the first and second electrode plates. Furthermore, an insulating layer or the like can be provided between the aluminum foil and the battery body.

[0095] According to another embodiment of the present disclosure, the first electrode plate and / or the second electrode plate are conductors or conductive materials disposed near the outer surface of one battery cell and / or disposed near the outer surface of another battery cell, respectively. For example, a separate conductor may be provided to serve as the first electrode plate and the second electrode plate, or a conductive material may be provided to achieve the functions of the first electrode plate and the second electrode plate.

[0096] The battery measurement system may further include an application device for applying an excitation to the first electrode plate and / or the second electrode plate. It may also include a threshold comparison unit for determining that the battery has failed when the capacitance change exceeds a predetermined threshold.

[0097] According to another aspect of the present disclosure, a battery management system is provided, including the battery measurement system as described above, and the battery measurement system is used to measure the deformation of battery cells in a battery pack.

[0098] According to a second aspect of the present disclosure, a battery measurement system in a battery pack is provided. The battery pack includes two or more battery cells, which are arranged at a predetermined distance from each other. The battery measurement system includes: a capacitance sensing device, the capacitance sensing device including a first electrode array and a second electrode array; and a processing device, the processing device processing output signals of the first electrode array and / or the second electrode array to obtain a capacitance change between the first electrode array and the second electrode array generated when the distance between the first electrode array and the second electrode array changes due to deformation of the battery cells, wherein the first electrode array includes two or more first electrode plates and the second electrode array includes two or more second electrode plates, the extension direction of the two or more first electrode plates and the extension direction of the two or more second electrode plates form a predetermined angle, the first electrode array is arranged on, near, or inside an outer surface of one of the adjacent battery cells, and the second electrode array is arranged on, near, or inside an outer surface of the other of the adjacent battery cells, wherein the first electrode array and the second electrode array are arranged in the predetermined space and are arranged opposite to each other. The predetermined angle can be 90 degrees.

[0099] A first electrode plate array and a second electrode plate array are provided between every two adjacent batteries of the two or more battery units. The first electrode plate array and the second electrode plate array can be provided in parallel.

[0100] The following description takes two battery cells as an example. Figure 6 A schematic diagram of the arrangement of the first electrode plate and the second electrode plate of the first battery unit and the second battery unit is shown.

[0101] like Figure 6 As shown, the first electrode plate 210 provided in the first electrode array of the first battery cell 110 can extend along the first direction and can be arranged in parallel with a plurality of them, and the second electrode plate 220 provided in the second electrode array of the second battery cell 120 can extend along the second direction and can also be arranged in parallel with a plurality of them. In this way, when the first electrode plate 210 and the second electrode plate 220 are arranged opposite to each other, the deformation of the battery cell can be sensed by the capacitance value generated between the first electrode plate 210 and the second electrode plate 220. It should be noted that although Figure 6 In the embodiment, the first electrode plate 210 and the second electrode plate 220 are configured as long strips, but they may also adopt other shapes, which are not limited in the present disclosure.

[0102] The battery measurement system may further include an applying device for applying excitation to one or more of the two or more first plates in a time-sharing manner, and / or applying excitation to one or more of the two or more second plates in a time-sharing manner.

[0103] For example, an excitation voltage is applied to one first plate 210 at a first time, and then the electrostatic capacitance value between the first plate and the second plate is measured. Then, an excitation voltage is applied to another first plate, and the electrostatic capacitance value between the first plate and the second plate is measured, and so on.

[0104] In this way, the electrostatic capacitance value between the first electrode plate and the second electrode plate obtained after the excitation voltage is applied to each first electrode plate can be finally obtained.

[0105] The processing device obtains the capacitance changes measured based on each first electrode plate and / or second electrode plate after applying excitation to the first electrode plate and / or the second electrode plate at one time and at other times, and compares the capacitance changes, and determines the deformation position, deformation amount, deformation range and / or deformation type of the battery based on the comparison results.

[0106] For example, when something like Figure 3 In the case of a bulge-type fault of the shape shown, the change in the electrostatic capacitance of the first electrode 210 and the second electrode 220 at the bulge will be greater than the change in the electrostatic capacitance of the two first electrode 210 and the second electrode 220 on both sides. In this way, by detecting the change in the electrostatic capacitance of the detection unit composed of each first electrode 210 and the second electrode 220, the location of the deformation can be obtained, and the type of deformation can also be obtained by the deformation location. For example, when the following occurs Figure 4 In the case of the extrusion type fault shown, the change values of the electrostatic capacitance of each unit are roughly equal, so the fault can be defined as an extrusion type fault. In the case of large differences, the fault can be defined as a bulge type fault.

[0107] In one embodiment of the present disclosure, the conductive material used for the external packaging of each battery cell can be used as the first and second electrode plates. For example, battery cells are typically wrapped in aluminum foil, and the aluminum foil used for the wrapping can be used as the first and second electrode plates. Furthermore, an insulating layer or the like can be provided between the aluminum foil and the battery body. In this case, the aluminum foil used for the packaging can be processed to form the first and second electrode plates.

[0108] According to another embodiment of the present disclosure, the first electrode plate and / or the second electrode plate are conductors or conductive materials disposed near the outer surface of one battery cell and / or disposed near the outer surface of another battery cell, respectively. For example, a separate conductor may be provided to serve as the first electrode plate and the second electrode plate, or a conductive material may be provided to achieve the functions of the first electrode plate and the second electrode plate.

[0109] In addition, when the capacitance change exceeds a predetermined threshold, it is determined that the battery has failed.

[0110] According to a further embodiment of the present disclosure, a battery management system is provided, including the battery measurement system as described above, and the battery measurement system is used to measure the deformation of battery cells in a battery pack.

[0111] According to a third aspect of the present disclosure, a battery measurement system in a battery pack is provided, the battery pack including two or more battery cells, which are arranged at a predetermined distance, the battery measurement system including: a capacitance sensing device, the capacitance sensing device including a first electrode plate, a second electrode plate and an intermediate electrode plate; and a processing device, the processing device processing the output signals of the first electrode plate, the second electrode plate and / or the intermediate electrode plate to obtain the capacitance change between the first electrode plate and the intermediate electrode plate, and / or between the second electrode plate and the intermediate electrode plate generated when the distance between the first electrode plate and the intermediate electrode plate, and / or between the second electrode plate and the intermediate electrode plate changes due to deformation of the battery cell, the first electrode plate is arranged on, near or inside one battery cell of the adjacent battery cells, the second electrode plate is arranged on, near or inside another battery cell of the adjacent battery cells, the intermediate electrode plate is located between the first electrode plate and the second electrode plate, and the intermediate electrode plate is arranged opposite to the first electrode plate and the second electrode plate in the predetermined space.

[0112] A first electrode plate, a second electrode plate and an intermediate electrode plate are provided between every two adjacent batteries of the two or more battery units.

[0113] like Figure 7 As shown, an intermediate plate 230 is provided between the first plate 210 and the second plate 220. The deformation of the first battery cell 110 can be determined by the capacitance change between the intermediate plate 230 and the first plate 210, and the deformation of the second battery cell 120 can be determined by the capacitance change between the intermediate plate 230 and the second plate 220. The principles for other battery cells are the same and will not be described in detail.

[0114] In one embodiment of the present disclosure, the conductive material used for the external packaging of each battery cell can be used as the first and second electrode plates. For example, battery cells are typically wrapped in aluminum foil, and the aluminum foil used for the wrapping can be used as the first and second electrode plates. Furthermore, an insulating layer or the like can be provided between the aluminum foil and the battery body. In this case, the aluminum foil used for the packaging can be processed to form the first and second electrode plates.

[0115] According to another embodiment of the present disclosure, the first electrode plate and / or the second electrode plate are conductors or conductive materials disposed near the outer surface of one battery cell and / or disposed near the outer surface of another battery cell, respectively. For example, a separate conductor may be provided to serve as the first electrode plate and the second electrode plate, or a conductive material may be provided to achieve the functions of the first electrode plate and the second electrode plate.

[0116] The intermediate plate can be a single conductor, or conductors / conductive materials can be provided on both sides of the intermediate plate. When the intermediate plate is a single conductor, the deformation of the first battery cell 110 and the deformation of the second battery cell 120 can be determined by detecting the capacitance changes between the intermediate plate and the first plate, and between the intermediate plate and the second plate, respectively. When conductors / conductive materials are provided on both sides of the intermediate plate, the deformation of the first battery cell 110 is measured using the conductors / conductive materials on the side of the intermediate plate opposite the first plate, and the deformation of the second battery cell 120 is measured using the conductors / conductive materials on the side of the intermediate plate opposite the second plate. When conductors or conductive materials are provided on both sides of the intermediate plate, the conductors or conductive materials on both sides are insulated.

[0117] and Figure 5 Similar to the embodiment shown, the number of the first electrode plates, the second electrode plates, and the intermediate electrode plates is respectively more than two, and the two or more first electrode plates are provided in a one-to-one correspondence with the two or more intermediate electrode plates to constitute two or more first capacitance sensing units, and the two or more second electrode plates are provided in a one-to-one correspondence with the two or more intermediate electrode plates to constitute two or more second capacitance sensing units. The processing device respectively obtains the unit capacitance change values formed by the two or more first capacitance sensing units and the two or more second capacitance sensing units.

[0118] The processing device includes a comparison unit, which is used to compare the capacitance change values of each cell and determine the deformation position, deformation amount, deformation range and / or deformation type of the battery according to the comparison result.

[0119] Similarly, the first electrode plate and / or the second electrode plate are conductors for packaging one battery cell and / or another battery cell, and the intermediate electrode plate is a conductor or conductive material disposed between the first and second electrode plates. Alternatively, the first electrode plate and / or the second electrode plate are conductors or conductive materials disposed near the outer surface of one battery cell and / or another battery cell, respectively, and the intermediate electrode plate is a conductor or conductive material disposed between the first and second electrode plates.

[0120] The first electrode plate, the second electrode plate and the middle electrode plate are arranged in parallel.

[0121] The battery is also provided with an applying device for applying an excitation to the first electrode plate, the second electrode plate and / or the intermediate electrode plate. When the capacitance change exceeds a predetermined threshold, it is determined that the battery has a fault.

[0122] According to a further embodiment of the present disclosure, a battery management system is provided, including the battery measurement system as described above, and the battery measurement system is used to measure the deformation of battery cells in a battery pack.

[0123] According to a fourth aspect of the present disclosure, a battery measurement system in a battery pack is provided, wherein the battery pack includes two or more battery cells, and the two or more battery cells are arranged at a predetermined distance. The battery measurement system includes: a capacitance sensing device, the capacitance sensing device includes a first electrode array, a second electrode array, and an intermediate electrode array; and a processing device, the processing device processes the output signals of the first electrode array, the second electrode array, and / or the intermediate electrode array to obtain the capacitance change generated when the battery cell deformation causes the distance between the first electrode array and the intermediate electrode array, and / or between the second electrode array and the intermediate electrode array to change, wherein the first electrode array includes two or more first electrodes, the second electrode array, and the intermediate electrode array. The plate array includes two or more second electrode plates and the intermediate electrode array includes two or more intermediate electrode plates, the extension direction of the two or more first electrode plates is at a predetermined angle to the extension direction of the two or more intermediate electrode plates, the extension direction of the two or more second electrode plates is at a predetermined angle to the extension direction of the two or more intermediate electrode plates, the first electrode plate array is arranged on, near or inside the outer surface of one battery cell of the adjacent battery cells, the second electrode plate array is arranged on, near or inside the outer surface of the other battery cell of the adjacent battery cells, and the intermediate electrode plate array is arranged between the first electrode plate array and the second electrode plate array, wherein the first electrode plate array, the second electrode plate array and the intermediate electrode plate array are arranged in a predetermined space and are arranged opposite to each other.

[0124] A first electrode array, a second electrode array, and an intermediate electrode array are disposed between each two adjacent batteries in two or more battery cells. The first electrode array, the second electrode array, and the intermediate electrode array are disposed in parallel. The predetermined angle is 90 degrees.

[0125] Conductors or conductive materials are respectively provided on both sides of the intermediate plate array, and the conductors or conductive materials on both sides are insulated.

[0126] It also includes an applying device, which is used to apply excitation to one or more of the two or more first electrode plates in a time-sharing manner, apply excitation to one or more of the two or more second electrode plates in a time-sharing manner, and / or apply excitation to one or more of the two or more intermediate electrode plates in a time-sharing manner.

[0127] The processing device obtains the capacitance changes measured based on each first electrode plate, the second electrode plate and / or the intermediate electrode plate after applying excitation to the first electrode plate, the second electrode plate and / or the intermediate electrode plate at one time and at other times, and compares the capacitance changes, and determines the deformation position, deformation amount, deformation range and / or deformation type of the battery based on the comparison results.

[0128] The first electrode plate and / or the second electrode plate are electrical conductors or conductive materials respectively disposed near an outer surface of one battery cell and / or disposed near an outer surface of another battery cell.

[0129] When the capacitance change exceeds a predetermined threshold, it is determined that the battery has failed.

[0130] When the capacitance changes between each first electrode plate and each intermediate electrode plate, and / or the capacitance changes between each second electrode plate and each intermediate electrode plate are consistent, the battery cell is considered to be squeezed; when the capacitance changes between each first electrode plate and each intermediate electrode plate, and / or the capacitance changes between each second electrode plate and each intermediate electrode plate are inconsistent, the battery cell is considered to be bulging.

[0131] The technical solution of the fourth aspect of this disclosure is Figure 6 The example is different in that it further includes an intermediate plate array, and the intermediate plate may include a plurality of strip-shaped intermediate plates.

[0132] For example, multiple first electrode plates may extend parallel to a first direction, multiple second electrode plates may also extend parallel to the first direction, and multiple intermediate electrode plates may extend along a second direction that forms a certain angle with the first direction, for example, the certain angle may be 90 degrees. The measurement method may also be similar to the technical solution of the second aspect and will not be further described here.

[0133] According to a further embodiment of the present disclosure, a battery management system is provided, including the battery measurement system as described above, and the battery measurement system is used to measure the deformation of battery cells in a battery pack.

[0134] Figure 8 A schematic diagram of a processing device according to an embodiment of the present disclosure is shown, wherein the processing device may include an application unit that can provide a square wave voltage, a step wave voltage, etc. of a predetermined hertz, and a sampling unit that can receive a signal from the electrode plate, provide the received signal to an analog-to-digital conversion unit, and after conversion by the analog-to-digital conversion unit, provide the signal to a filtering unit, etc., so that the corresponding capacitance change value can be measured. In addition, when the processing device is used to process multiple electrode plates, a multiplexing unit can be provided before the sampling unit. For example, a switch in the multiplexing unit can be used to select the signal to be measured for each electrode plate.

[0135] In a preferred embodiment of the present disclosure, when multiple first plates are included, insulating materials or insulating components may be provided between the multiple first plates to prevent short circuits between the first plates when the battery cell is deformed. In addition, similarly, when multiple second plates / intermediate plates are included, each second plate / intermediate plate may also be provided with insulating materials or insulating components to prevent short circuits after deformation. In addition, insulating materials or insulating components may also be provided between the first plate and the second plate, between the first plate and the intermediate plate, and / or between the second plate and the intermediate plate. When providing the insulating material or insulating component as described above, the insulating material or insulating component may be provided between the two plates, or the surface of each plate may be wrapped with the insulating material or insulating component.

[0136] In addition, in the above implementation manners / examples, the first electrode plate / second electrode plate is arranged on the outer surface of the battery cell. However, the first electrode plate / second electrode plate can also be arranged inside the outer surface of the battery cell, for example, inside the outer packaging of the battery cell.

[0137] In the above description, the technical solution disclosed herein can be used to determine the position, amount, range, and / or type of battery deformation. For example, when multiple first, second, or intermediate plates are provided, the range of deformation can be determined by the signals from plates located at different positions. For example, when the signals from plates at certain positions change, the range of deformation can be determined. The same approach can also be used to determine the area of deformation. Furthermore, the amount of deformation of the battery cell can also be determined based on the magnitude of the change in capacitance.

[0138] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0139] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0140] Those skilled in the art will appreciate that the above embodiments are merely intended to clearly illustrate the present disclosure and are not intended to limit the scope of the present disclosure. Other changes or modifications may be made based on the above disclosure, and such changes or modifications are still within the scope of the present disclosure.

Claims

1. A battery measurement system, characterized in that: The battery measurement system measures the deformation of a battery cell in a battery pack, wherein the battery pack includes two or more battery cells, and the two or more battery cells are arranged with a predetermined space between them. The battery measurement system includes: a capacitive sensing device disposed between every two adjacent battery cells, the capacitive sensing device comprising a first electrode plate and a second electrode plate, the first electrode plate being disposed on an outer surface, near, or inside one of the two adjacent battery cells, and the second electrode plate being disposed on an outer surface, near, or inside the other of the two adjacent battery cells, wherein the first electrode plate and the second electrode plate are disposed in the predetermined space and facing each other; and A processing device processes the output signal of the first electrode plate and / or the second electrode plate to obtain a capacitance change between the first electrode plate and the second electrode plate generated when the distance between the first electrode plate and the second electrode plate changes due to deformation of the battery cell.

2. The battery measurement system according to claim 1, wherein: A first electrode plate and a second electrode plate are provided between every two adjacent batteries of the two or more battery units.

3. The battery measurement system according to claim 1, wherein: The number of the first electrode plates and the number of the second electrode plates are respectively more than two, and the more than two first electrode plates and the more than two second electrode plates are arranged in a one-to-one correspondence and constitute more than two capacitance sensing units, and the processing device respectively obtains the unit capacitance change values respectively formed by the more than two capacitance sensing units.

4. The battery measurement system according to claim 3, wherein: The processing device includes a comparison unit, which is used to compare the capacitance change values of each of the cells and determine the deformation position, deformation amount, deformation range and / or deformation type of the battery according to the comparison result.

5. The battery measuring system according to any one of claims 1 to 4, characterized in that: The first electrode plate and / or the second electrode plate is / are the conductor for the one battery cell package and / or the conductor for the other battery cell package.

6. The battery measuring system according to any one of claims 1 to 4, characterized in that: The first electrode plate and / or the second electrode plate are conductors or conductive materials respectively arranged near or inside the outer surface of the one battery cell and / or near or inside the outer surface of the other battery cell.

7. The battery measuring system according to any one of claims 1 to 4, characterized in that: The first electrode plate and the second electrode plate are arranged in parallel.

8. The battery measuring system according to any one of claims 1 to 4, characterized in that: The device further comprises an applying device for applying an excitation to the first electrode plate and / or the second electrode plate.

9. The battery measuring system according to any one of claims 1 to 4, characterized in that: When the capacitance change exceeds a predetermined threshold, it is determined that the battery has a fault.

10. A battery management system, characterized in that: The battery measuring system comprises the battery measuring system according to any one of claims 1 to 9, wherein the deformation of the battery cells in the battery pack is measured by the battery measuring system.

11. A battery measurement system, characterized in that: The battery measurement system measures the deformation of a battery cell in a battery pack, wherein the battery pack includes two or more battery cells, and the two or more battery cells are arranged with a predetermined space between them. The battery measurement system includes: a capacitive sensing device, disposed between every two adjacent battery cells, the capacitive sensing device comprising a first electrode array and a second electrode array; and a processing device for processing output signals of the first plate array and / or the second plate array to obtain a capacitance change between the first plate array and the second plate array generated when a distance change between the first plate array and the second plate array is caused by deformation of the battery cell; In which, the first electrode plate array includes more than two first electrode plates and the second electrode plate array includes more than two second electrode plates, the extension direction of the two or more first electrode plates and the extension direction of the two or more second electrode plates form a predetermined angle, the first electrode plate array is arranged on the outer surface, near or inside of one battery cell of two adjacent battery cells, and the second electrode plate array is arranged on the outer surface, near or inside of the other battery cell of the two adjacent battery cells, wherein the first electrode plate array and the second electrode plate array are arranged in the predetermined space and are arranged opposite to each other.

12. The battery measurement system according to claim 11, wherein: A first electrode plate array and a second electrode plate array are provided between every two adjacent batteries of the two or more battery units.

13. The battery measurement system according to claim 12, wherein: The first electrode plate array and the second electrode plate array are arranged in parallel.

14. The battery measurement system according to claim 13, wherein: The predetermined angle is 90 degrees.

15. The battery measuring system according to any one of claims 11 to 14, characterized in that: It also includes an applying device, which is used to apply excitation to one or more first plates among the two or more first plates in a time-sharing manner, and / or to one or more second plates among the two or more second plates in a time-sharing manner.

16. The battery measurement system according to claim 15, wherein: The processing device obtains capacitance changes measured based on each first electrode plate and / or second electrode plate after applying excitation to the first electrode plate and / or the second electrode plate at one time and at another time, compares the capacitance changes, and determines the deformation position, deformation amount, deformation range and / or deformation type of the battery based on the comparison result.

17. The battery measuring system according to any one of claims 11 to 14, characterized in that: The first electrode plate and / or the second electrode plate are conductors or conductive materials respectively arranged near or inside the outer surface of the one battery cell and / or near or inside the outer surface of the other battery cell.

18. The battery measuring system according to any one of claims 11 to 14, characterized in that: When the capacitance change exceeds a predetermined threshold, it is determined that the battery has a fault.

19. The battery measuring system according to any one of claims 11 to 14, characterized in that: When the capacitance changes measured according to each first plate and / or according to each second plate are consistent, the battery cell is considered to be squeezed; when the capacitance changes measured according to each first plate and / or according to each second plate are inconsistent, the battery cell is considered to be bulging.

20. A battery management system, characterized in that: The battery measuring system comprises the battery measuring system according to any one of claims 11 to 19, wherein the deformation of the battery cells in the battery pack is measured by the battery measuring system.

21. A battery measurement system, characterized in that: The battery measurement system measures the deformation of a battery cell in a battery pack, wherein the battery pack includes two or more battery cells, and the two or more battery cells are arranged with a predetermined space between them. The battery measurement system includes: A capacitive sensing device is provided between every two adjacent battery cells, the capacitive sensing device comprising a first electrode plate, a second electrode plate and an intermediate electrode plate; and a processing device for processing output signals of the first electrode plate, the second electrode plate, and / or the intermediate electrode plate to obtain capacitance changes between the first electrode plate and the intermediate electrode plate, and / or between the second electrode plate and the intermediate electrode plate, generated when the distance between the first electrode plate and the intermediate electrode plate, and / or between the second electrode plate and the intermediate electrode plate changes due to deformation of the battery cell; The first electrode plate is arranged on the outer surface, near or inside one of the two adjacent battery cells, the second electrode plate is arranged on the outer surface, near or inside the other of the two adjacent battery cells, the intermediate electrode plate is located between the first electrode plate and the second electrode plate, and the intermediate electrode plate is respectively arranged opposite to the first electrode plate and the second electrode plate in the predetermined space.

22. The battery measurement system according to claim 21, wherein: A first electrode plate, a second electrode plate and an intermediate electrode plate are provided between every two adjacent batteries of the two or more battery units.

23. The battery measurement system according to claim 21, wherein: The number of the first electrode plates, the second electrode plates, and the intermediate electrode plates is respectively more than two, and the more than two first electrode plates are arranged in a one-to-one correspondence with the more than two intermediate electrode plates to constitute more than two first capacitance sensing units, and the more than two second electrode plates are arranged in a one-to-one correspondence with the more than two intermediate electrode plates to constitute more than two second capacitance sensing units. The processing device respectively obtains the unit capacitance change values formed by the more than two first capacitance sensing units and the more than two second capacitance sensing units.

24. The battery measurement system according to claim 23, wherein: The processing device includes a comparison unit, which is used to compare the capacitance change values of each of the cells and determine the deformation position, deformation amount, deformation range and / or deformation type of the battery according to the comparison result.

25. The battery measuring system according to any one of claims 21 to 24, characterized in that: The first electrode plate and / or the second electrode plate is the conductor for the one battery cell package and / or the conductor for the other battery cell package, and the intermediate electrode plate is a conductor or a conductive material disposed between the first electrode plate and the second electrode plate.

26. The battery measuring system according to any one of claims 21 to 24, characterized in that: The first electrode plate and / or the second electrode plate are conductors or conductive materials respectively arranged near or inside the outer surface of the one battery cell and / or near or inside the outer surface of the other battery cell, and the intermediate electrode plate is a conductor or conductive material arranged between the first electrode plate and the second electrode plate.

27. The battery measuring system according to any one of claims 21 to 24, characterized in that: The first electrode plate, the second electrode plate and the intermediate electrode plate are arranged in parallel.

28. The battery measuring system according to any one of claims 21 to 24, characterized in that: The system further comprises an applying device for applying an excitation to the first electrode plate, the second electrode plate and / or the intermediate electrode plate.

29. The battery measuring system according to any one of claims 21 to 24, characterized in that: When the capacitance change exceeds a predetermined threshold, it is determined that the battery has a fault.

30. The battery measuring system according to any one of claims 21 to 24, characterized in that: Conductors or conductive materials are respectively provided on both sides of the intermediate plate, and the conductors or conductive materials on both sides are insulated.

31. A battery management system, characterized in that: The battery measuring system comprises the battery measuring system according to any one of claims 21 to 30, wherein the deformation of the battery cells in the battery pack is measured by the battery measuring system.

32. A battery measurement system, characterized in that: The battery measurement system measures the deformation of a battery cell in a battery pack, wherein the battery pack includes two or more battery cells, and the two or more battery cells are arranged with a predetermined space between them. The battery measurement system includes: A capacitive sensing device is provided between every two adjacent battery cells, the capacitive sensing device comprising a first electrode array, a second electrode array and an intermediate electrode array; and a processing device for processing output signals of the first plate array, the second plate array, and / or the intermediate plate array to obtain capacitance changes generated when the distance between the first plate array and the intermediate plate array, and / or between the second plate array and the intermediate plate array, changes due to deformation of the battery cells. In which, the first electrode plate array includes more than two first electrode plates, the second electrode plate array includes more than two second electrode plates, and the intermediate electrode plate array includes more than two intermediate electrode plates, the extension direction of the two or more first electrode plates is at a predetermined angle to the extension direction of the two or more intermediate electrode plates, the extension direction of the two or more second electrode plates is at a predetermined angle to the extension direction of the two or more intermediate electrode plates, the first electrode plate array is arranged on the outer surface, near or inside of one battery cell of two adjacent battery cells, the second electrode plate array is arranged on the outer surface, near or inside of the other battery cell of the two adjacent battery cells, and the intermediate electrode plate array is arranged between the first electrode plate array and the second electrode plate array, wherein the first electrode plate array, the second electrode plate array and the intermediate electrode plate array are arranged in the predetermined space and are arranged opposite to each other.

33. The battery measurement system according to claim 32, wherein: A first electrode plate array, a second electrode plate array and an intermediate electrode plate array are arranged between every two adjacent batteries of the two or more battery units.

34. The battery measurement system according to claim 33, wherein: The first electrode array, the second electrode array and the middle electrode array are arranged in parallel.

35. The battery measurement system according to claim 34, wherein: The predetermined angle is 90 degrees.

36. The battery measurement system according to claim 35, wherein: Conductors or conductive materials are respectively provided on both sides of the intermediate plate array, and the conductors or conductive materials on both sides are insulated.

37. The battery measuring system according to any one of claims 32 to 36, wherein: It also includes an applying device, which is used to apply excitation to one or more of the two or more first electrode plates in a time-sharing manner, apply excitation to one or more of the two or more second electrode plates in a time-sharing manner, and / or apply excitation to one or more of the two or more intermediate electrode plates in a time-sharing manner.

38. The battery measurement system according to claim 37, wherein: The processing device obtains capacitance changes measured based on each first electrode plate, second electrode plate and / or intermediate electrode plate after applying excitation to the first electrode plate, second electrode plate and / or intermediate electrode plate at one time and at another time, compares the capacitance changes, and determines the deformation position, deformation amount, deformation range and / or deformation type of the battery according to the comparison result.

39. The battery measuring system according to any one of claims 32 to 36, wherein: The first electrode plate and / or the second electrode plate are conductors or conductive materials respectively arranged near the outer surface of the one battery cell and / or near the outer surface of the other battery cell.

40. The battery measuring system according to any one of claims 32 to 36, wherein: When the capacitance change exceeds a predetermined threshold, it is determined that the battery has a fault.

41. The battery measuring system according to any one of claims 32 to 36, wherein: When the capacitance changes between each first electrode plate and each intermediate electrode plate, and / or the capacitance changes between each second electrode plate and each intermediate electrode plate are consistent, the battery cell is considered to be squeezed; when the capacitance changes between each first electrode plate and each intermediate electrode plate, and / or the capacitance changes between each second electrode plate and each intermediate electrode plate are inconsistent, the battery cell is considered to be bulging.

42. A battery management system, characterized in that: The battery measuring system comprises the battery measuring system according to any one of claims 32 to 41, wherein the deformation of the battery cells in the battery pack is measured by the battery measuring system.

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