Battery safety detection device and battery management system

Abstract

The present disclosure provides a battery safety detection device, comprising: at least one sensing unit, wherein the sensing unit is used to detect the battery device. The present disclosure also provides a battery management system.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of battery safety detection, and in particular relates to a battery safety detection device and a battery management system. Background Art

[0002] Lithium batteries will deform when subjected to external forces, and will also bulge when the battery ages. When lithium batteries have the above problems, internal short circuits, fires and explosions will occur. Therefore, safety testing of lithium batteries is necessary.

[0003] How to effectively and accurately detect battery safety and how to predict battery failures are issues that need to be addressed in the battery safety field. Summary of the invention

[0004] In order to solve one of the above technical problems, the present disclosure provides a battery safety detection device and a battery management system.

[0005] According to one aspect of the present disclosure, a battery safety detection device is provided, comprising:

[0006] at least one strain sensing portion, the at least one strain sensing portion being disposed on at least one surface of a battery of the battery device, the strain sensing portion being capable of generating a strain electrical signal based on at least a deformation of the battery of the battery device, the strain electrical signal at least indicating the occurrence of the deformation;

[0007] Wherein, the strain sensing unit includes at least one strain sensing device, the strain sensing device includes a plurality of conductive elements, the plurality of conductive elements are uniformly arranged in a two-dimensional array, and each conductive element is insulated from other conductive elements; the strain sensing device can respond to the deformation of the battery to cause the position of the two-dimensional array corresponding to the deformation of the battery to deform, and the strain sensing unit generates the strain electrical signal based on the deformation of the two-dimensional array.

[0008] According to the battery safety detection device of at least one embodiment of the present disclosure, the strain electrical signal includes a self-capacitance change signal of any one conductive element of the two-dimensional array.

[0009] According to the battery safety detection device of at least one embodiment of the present disclosure, the strain electrical signal includes a mutual capacitance change signal between two adjacent conductive elements of the two-dimensional array.

[0010] According to the battery safety detection device of at least one embodiment of the present disclosure, the two-dimensional array includes a plurality of conductive elements arranged along a first direction and a plurality of conductive elements arranged along a second direction, and the first direction is perpendicular to the second direction.

[0011] According to the battery safety detection device of at least one embodiment of the present disclosure, the two adjacent conductive elements are two conductive elements adjacent to each other along a first direction or two conductive elements adjacent to each other along a second direction, and the first direction is perpendicular to the second direction.

[0012] According to the battery safety detection device of at least one embodiment of the present disclosure, the strain electrical signal includes a mutual capacitance change signal between any two non-adjacent conductive elements of the two-dimensional array.

[0013] According to the battery safety detection device of at least one embodiment of the present disclosure, the strain sensing part includes two strain sensing devices, the two strain sensing devices are arranged opposite to each other, and an insulating gap is arranged between the two strain sensing devices.

[0014] According to the battery safety detection device of at least one embodiment of the present disclosure, the insulating gap is filled with a flexible insulating material.

[0015] According to the battery safety detection device of at least one embodiment of the present disclosure, a driving electrical signal is simultaneously applied to all the conductive elements of the strain sensing device, and the self-capacitance of each conductive element is measured simultaneously. If the self-capacitance of the conductive element changes, a self-capacitance change signal is generated.

[0016] According to the battery safety detection device of at least one embodiment of the present disclosure, a driving electrical signal is applied to each conductive element of all conductive elements of the strain sensing device in turn, and the self-capacitance of each conductive element is measured in turn, and a self-capacitance change signal is generated if the self-capacitance of the conductive element changes.

[0017] According to at least one embodiment of the battery safety detection device disclosed herein, the degree of deformation is determined based on the size of the self-capacitance change signal, and the deformation position is determined based on the position of the conductive element whose self-capacitance changes in the two-dimensional array.

[0018] According to at least one embodiment of the battery safety detection device of the present disclosure, the conductive elements arranged along the first direction of the two-dimensional array are divided into multiple groups along the second direction, and the following operations are performed simultaneously on each group of the multiple groups of conductive elements:

[0019] A driving electrical signal is sequentially applied to a mutual capacitor formed by two adjacent conductive elements, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0020] According to at least one embodiment of the battery safety detection device of the present disclosure, the conductive elements arranged along the first direction of the two-dimensional array are divided into multiple groups along the second direction, and the following operations are performed in sequence for each group of the multiple groups of conductive elements:

[0021] A driving electrical signal is sequentially applied to a mutual capacitor formed by two adjacent conductive elements, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0022] According to at least one embodiment of the battery safety detection device of the present disclosure, the conductive elements arranged along the second direction of the two-dimensional array are divided into multiple groups along the first direction, and the following operations are performed simultaneously on each group of conductive elements in the multiple groups of conductive elements:

[0023] A driving electrical signal is sequentially applied to a mutual capacitor formed by two adjacent conductive elements, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0024] According to at least one embodiment of the battery safety detection device of the present disclosure, the conductive elements arranged along the second direction of the two-dimensional array are divided into multiple groups along the first direction, and the following operations are performed in sequence for each group of conductive elements in the multiple groups of conductive elements:

[0025] A driving electrical signal is sequentially applied to a mutual capacitor formed by two adjacent conductive elements, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0026] According to at least one embodiment of the battery safety detection device of the present disclosure, the conductive elements arranged along the first direction of the two-dimensional array are divided into multiple groups along the second direction, and the following operations are performed simultaneously on each group of the multiple groups of conductive elements:

[0027] A driving electrical signal is sequentially applied to a mutual capacitor formed by two conductive elements with a predetermined conductive element interval, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0028] According to at least one embodiment of the battery safety detection device of the present disclosure, the conductive elements arranged along the second direction of the two-dimensional array are divided into multiple groups along the first direction, and the following operations are performed simultaneously on each group of conductive elements in the multiple groups of conductive elements:

[0029] A driving electrical signal is sequentially applied to a mutual capacitor formed by two conductive elements with a predetermined conductive element interval, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0030] According to at least one embodiment of the battery safety detection device of the present disclosure, the conductive elements arranged along the first direction of the two-dimensional array are divided into multiple groups along the second direction, and the following operations are performed in sequence for each group of the multiple groups of conductive elements:

[0031] A driving electrical signal is sequentially applied to a mutual capacitor formed by two conductive elements with a predetermined conductive element interval, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0032] According to at least one embodiment of the battery safety detection device of the present disclosure, the conductive elements arranged along the second direction of the two-dimensional array are divided into multiple groups along the first direction, and the following operations are performed in sequence for each group of conductive elements in the multiple groups of conductive elements:

[0033] A driving electrical signal is sequentially applied to a mutual capacitor formed by two conductive elements with a predetermined conductive element interval, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0034] According to at least one embodiment of the battery safety detection device of the present disclosure, the two-dimensional array includes a first sub-array and a second sub-array, and the first sub-array and the second sub-array are arranged in the same plane area;

[0035] The first sub-array includes a plurality of first series-connected conductive element groups, the first series-connected conductive element groups include a plurality of conductive elements connected in series along a first direction, and the plurality of first series-connected conductive element groups are arranged along a second direction; each first series-connected conductive element group is insulated from another first series-connected conductive element group;

[0036] The second sub-array includes a plurality of second series-connected conductive element groups, the second series-connected conductive element groups include a plurality of conductive elements connected in series along a second direction, and the plurality of second series-connected conductive element groups are arranged along a first direction; each second series-connected conductive element group is insulated from another;

[0037] The first sub-array is insulated from the second sub-array;

[0038] The first direction and the second direction are perpendicular to each other.

[0039] According to the battery safety detection device of at least one embodiment of the present disclosure, the shape of the conductive elements of the first sub-array is the same as the shape of the conductive elements of the second sub-array.

[0040] According to the battery safety detection device of at least one embodiment of the present disclosure, a driving electrical signal is simultaneously applied to all first series conductive element groups of the first subarray and all second series conductive element groups of the second subarray, and the self-capacitance of all first series conductive element groups of the first subarray and all second series conductive element groups of the second subarray is simultaneously measured, and a self-capacitance change signal is generated if the self-capacitance changes.

[0041] According to the battery safety detection device of at least one embodiment of the present disclosure, the deformation position of the two-dimensional array is determined based on the position information of the first group of series conductive elements whose self-capacitance of at least one of the first sub-arrays changes in the first sub-array and the position information of the second group of series conductive elements whose self-capacitance of at least one of the second sub-arrays changes in the second sub-array.

[0042] According to the battery safety detection device of at least one embodiment of the present disclosure, a driving electrical signal is simultaneously applied to all first series conductive element groups of the first subarray and all second series conductive element groups of the second subarray, and the mutual capacitance of each mutual capacitor formed by each first series conductive element group of the first subarray and each second series conductive element group of the second subarray is simultaneously measured, and if the mutual capacitance changes, a mutual capacitance change signal is generated.

[0043] According to a battery safety detection device of at least one embodiment of the present disclosure, the deformation position of the two-dimensional array is determined based on the position information of the first series conductive element group of the mutual capacitor whose mutual capacitance changes in the first subarray, and the position information of the second series conductive element group in the second subarray.

[0044] According to at least one embodiment of the battery safety detection device disclosed herein, it is characterized in that the strain sensing part also includes a first substrate layer and a second substrate layer, and the strain sensing device is arranged between the first substrate layer and the second substrate layer and is held by the first substrate layer and the second substrate layer.

[0045] According to the battery safety detection device of at least one embodiment of the present disclosure, the first substrate layer and the second substrate layer are both made of insulating materials.

[0046] According to the battery safety detection device of at least one embodiment of the present disclosure, the first substrate layer and the second substrate layer are both flexible substrates.

[0047] According to the battery safety detection device of at least one embodiment of the present disclosure, the strain sensing part further includes a first substrate layer and a second substrate layer, and the two strain sensing devices are respectively arranged on the first substrate layer and the second substrate layer.

[0048] According to the battery safety detection device of at least one embodiment of the present disclosure, the strain sensing portion further includes a supporting portion, and the supporting portion is disposed between the first substrate layer and the second substrate layer.

[0049] According to the battery safety detection device of at least one embodiment of the present disclosure, the support portion is disposed at an edge of the first substrate layer and the second substrate layer.

[0050] According to the battery safety detection device of at least one embodiment of the present disclosure, the support portion includes a plurality of separate support portions, or the support portion is an integrated structure.

[0051] According to the battery safety detection device of at least one embodiment of the present disclosure, the first substrate layer and the second substrate layer are both made of insulating materials.

[0052] According to the battery safety detection device of at least one embodiment of the present disclosure, the first substrate layer and the second substrate layer are both made of flexible materials.

[0053] According to the battery safety detection device of at least one embodiment of the present disclosure, the strain sensing part can be disposed between two adjacent batteries.

[0054] According to the battery safety detection device of at least one embodiment of the present disclosure, the strain sensing part can be arranged between the battery and the housing.

[0055] According to the battery safety detection device of at least one embodiment of the present disclosure, the strain sensing unit can also generate the strain electrical signal based on the deformation of the shell of the battery device.

[0056] According to at least one embodiment of the present disclosure, the battery safety detection device further includes a drive detection unit that applies a drive electrical signal to the strain sensing unit and detects the strain electrical signal generated by the strain sensing unit.

[0057] According to the battery safety detection device of at least one embodiment of the present disclosure, the drive detection unit includes: a drive circuit, which is used to provide a drive electrical signal to the strain sensing unit; a detection circuit, which is used to detect the strain electrical signal; and a controller, which controls the drive circuit to provide the drive signal to the strain sensing unit, and processes the strain electrical signal obtained by the detection circuit to generate a processed strain electrical signal.

[0058] According to the battery safety detection device of at least one embodiment of the present disclosure, the drive detection unit further includes a memory, and the memory stores the strain electrical signal processed by the controller.

[0059] According to another aspect of the present disclosure, a battery management system is provided, comprising: any one of the above-mentioned battery safety detection devices. 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 The present invention is a schematic structural diagram of a battery device provided with a battery safety detection device according to an embodiment of the present invention.

[0062] Figure 2 This is a schematic structural diagram of a battery device provided with a battery safety detection device according to another embodiment of the present disclosure.

[0063] Figure 3 Schematic diagram of the structure of a strain sensing unit of a battery safety detection device according to an embodiment of the present disclosure.

[0064] Figure 4 A schematic structural diagram of a strain sensing device of a strain sensing portion of a battery safety detection device according to an embodiment of the present disclosure.

[0065] Figure 5 It is a schematic structural diagram of a strain sensing part of a battery safety detection device according to another embodiment of the present disclosure.

[0066] Figure 6 It is a schematic diagram of a manner in which conductive elements of a strain sensing device of a strain sensing part of a battery safety detection device according to an embodiment of the present disclosure can form a mutual capacitor.

[0067] Figure 7 This is a schematic structural diagram of a strain sensing device of a strain sensing part of a battery safety detection device according to another embodiment of the present disclosure.

[0068] Figure 8 for Figure 7 Schematic diagram of the structure of the first sub-array of strain sensing devices shown in FIG.

[0069] Fig. 9 for Figure 7 FIG. 4 is a schematic diagram of the structure of the second sub-array of strain sensing devices shown in FIG.

[0070] Fig.10 This is a schematic structural diagram of a strain sensing device of a strain sensing part of a battery safety detection device according to another embodiment of the present disclosure.

[0071] Fig.11 The present invention is a schematic diagram of the structure of a driving detection unit of a battery safety detection device according to an embodiment of the present invention.

[0072] Fig.12 is a schematic diagram of a battery management system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0073] The present disclosure is further described in detail below in conjunction with the accompanying drawings and implementations. It is understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0074] 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.

[0075] Unless otherwise specified, the exemplary embodiments / embodiments shown will be understood as providing exemplary features of various details of some ways in which the technical concept of the present disclosure can be implemented in practice. Therefore, unless otherwise specified, the features of the various embodiments / embodiments can be combined, separated, interchanged and / or rearranged without departing from the technical concept of the present disclosure.

[0076] 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 specified, 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 described order. In addition, the same figure numbers represent the same components.

[0077] When a component is referred to as being "on" or "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. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0078] For descriptive purposes, the present disclosure may use spatially relative terms such as "under," "beneath," "under," "down," "over," "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 accompanying drawings is turned over, components described as "under" or "beneath" other components or features would subsequently be positioned "over" the other components or features. Thus, the exemplary term "under" 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 the spatially relative descriptors used herein should be interpreted accordingly.

[0079] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, 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, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0080] The present disclosure provides a battery safety detection device, wherein the battery safety detection device can at least be used to detect battery deformation, wherein the deformation can be battery bulging deformation, or can be deformation formed by external compression of the battery. The cause of external compression can include collision or acceleration, etc.

[0081] Figure 1 The present invention is a schematic structural diagram of a battery device provided with a battery safety detection device according to an embodiment of the present invention. Figure 2 This is a schematic structural diagram of a battery device provided with a battery safety detection device according to another embodiment of the present disclosure. Figure 3 Schematic diagram of the structure of a strain sensing unit of a battery safety detection device according to an embodiment of the present disclosure. Figure 4 A schematic structural diagram of a strain sensing device of a strain sensing portion of a battery safety detection device according to an embodiment of the present disclosure. Figure 5It is a schematic structural diagram of a strain sensing part of a battery safety detection device according to another embodiment of the present disclosure. Figure 6 It is a schematic diagram of a manner in which conductive elements of a strain sensing device of a strain sensing part of a battery safety detection device according to an embodiment of the present disclosure can form a mutual capacitor. Figure 7 This is a schematic structural diagram of a strain sensing device of a strain sensing part of a battery safety detection device according to another embodiment of the present disclosure. Figure 8 for Figure 7 Schematic diagram of the structure of the first sub-array of strain sensing devices shown in FIG. Fig. 9 for Figure 7 FIG. 4 is a schematic diagram of the structure of the second sub-array of strain sensing devices shown in FIG. Fig.10 This is a schematic structural diagram of a strain sensing device of a strain sensing part of a battery safety detection device according to another embodiment of the present disclosure. Fig.11 The present invention is a schematic diagram of the structure of a driving detection unit of a battery safety detection device according to an embodiment of the present invention. Fig.12 is a schematic diagram of a battery management system according to an embodiment of the present disclosure.

[0082] Combined with the following Figures 1 to 12 The battery safety detection device and battery management system disclosed in the present invention are described in detail.

[0083] According to one embodiment of the present disclosure, a battery safety detection device includes:

[0084] At least one strain sensing portion 12, wherein the at least one strain sensing portion 12 is disposed on at least one surface of the battery 11 of the battery device 10, and the strain sensing portion 12 is capable of generating a strain electrical signal based on at least the deformation of the battery 11 of the battery device 10, and the strain electrical signal at least indicates the occurrence of the deformation;

[0085] Among them, the strain sensing unit 12 includes at least one strain sensing device 121, and the strain sensing device 121 includes a plurality of conductive elements 1211, and the plurality of conductive elements 1211 are evenly arranged in a two-dimensional array, and each conductive element 1211 is insulated from other conductive elements 1211; the strain sensing device 121 can respond to the deformation of the battery and cause the position of the two-dimensional array corresponding to the deformation of the battery to deform, and the strain sensing unit 12 generates the strain electrical signal based on the deformation of the two-dimensional array.

[0086] The conductive element 1211 may be a sheet-like conductive film, such as ITO (indium tin oxide).

[0087] Depend on Figure 1It can be seen that the battery device 10 may include only one battery 11, and the battery 11 may be a battery pack including a plurality of battery cells, or may be a battery cell. Figure 2 It can be seen that the battery device 10 includes a plurality of batteries 11. Figure 2 Four batteries 11 are shown as an example. The battery 11 may be a battery pack including a plurality of battery cells, or may be a battery cell.

[0088] Figure 1 The battery safety detection device shown in FIG. 1 has four strain sensing parts 12, which are respectively arranged between the four side surfaces of the battery 11 and the housing 15. The strain sensing parts 12 can also be arranged between the top surface of the battery 11 and the housing 15, or between the bottom surface of the battery 11 and the housing 15.

[0089] Figure 2 The battery device 10 shown in the figure has strain sensing portions 12 disposed between the batteries 11 , and also has strain sensing portions 12 disposed between the side surfaces of the batteries 11 and the housing 15 .

[0090] Those skilled in the art should understand that Figure 1 and Figure 2 The number of batteries 11 and the arrangement positions of the strain sensing parts 12 shown are exemplary.

[0091] For the battery safety detection device of the above embodiment, the strain electrical signal includes a self-capacitance change signal of any one of the conductive elements 1211 in the two-dimensional array.

[0092] For the battery safety detection device of the above embodiment, the strain electrical signal includes a mutual capacitance change signal between two adjacent conductive elements 1211 in a two-dimensional array.

[0093] According to a battery safety detection device of one embodiment of the present disclosure, Figure 4 As shown, the two-dimensional array includes a plurality of conductive elements 1211 arranged along a first direction and a plurality of conductive elements 1211 arranged along a second direction, and the first direction is perpendicular to the second direction.

[0094] In the above embodiment, the two adjacent conductive elements 1211 are two conductive elements adjacent to each other along a first direction or two conductive elements adjacent to each other along a second direction, and the first direction is perpendicular to the second direction.

[0095] According to the battery safety detection device of the alternative preferred embodiment of the present disclosure, the strain electrical signal includes a mutual capacitance change signal between any two non-adjacent conductive elements 1211 in the two-dimensional array.

[0096] Figure 3 The strain sensing portion 12 shown has only one strain sensing device 121. Figure 5 The strain sensing portion 12 shown has two strain sensing devices 121 .

[0097] like Figure 5 As shown, the strain sensing portion 12 includes two strain sensing devices 121 . The two strain sensing devices 121 are arranged opposite to each other, and an insulating gap is arranged between the two strain sensing devices 121 .

[0098] The insulating gap may be realized by a flexible insulating material, or may be air or vacuum.

[0099] For the battery safety detection device of each of the above-mentioned embodiments, preferably, a driving electrical signal is simultaneously applied to all the conductive elements 1211 of the strain sensing device 121, and the self-capacitance of each conductive element 1211 is simultaneously measured, and a self-capacitance change signal is generated if the self-capacitance of the conductive element 1211 changes.

[0100] For the battery safety detection device of each of the above-mentioned embodiments, preferably, a driving electrical signal is applied to each conductive element 1211 of all the conductive elements 1211 of the strain sensing device 121 in turn, and the self-capacitance of each conductive element 1211 is measured in turn, and a self-capacitance change signal is generated if the self-capacitance of the conductive element 1211 changes.

[0101] In each of the above-mentioned embodiments, the degree of deformation is determined based on the magnitude of the self-capacitance change signal, and the deformation position is determined based on the position of the conductive element 1211 whose self-capacitance changes in the two-dimensional array.

[0102] For the battery safety detection device in each of the above embodiments, preferably, Figure 4 As shown, for the conductive elements 1211 arranged along the first direction (the horizontal direction shown in the figure) of the two-dimensional array, they are divided into multiple groups along the second direction, and the following operations are performed simultaneously for each group of conductive elements 1211 of the multiple groups of conductive elements 1211:

[0103] A driving electrical signal is sequentially applied to a mutual capacitor formed by two adjacent conductive elements 1211 , and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0104] For the battery safety detection device in each of the above embodiments, preferably, Figure 4 As shown, for the conductive elements 1211 arranged along the first direction (the horizontal direction shown in the figure) of the two-dimensional array, they are divided into multiple groups along the second direction, and the following operations are performed in sequence for each group of conductive elements 1211 of the multiple groups of conductive elements 1211:

[0105] A driving electrical signal is sequentially applied to a mutual capacitor formed by two adjacent conductive elements 1211 , and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0106] For the battery safety detection device in each of the above embodiments, preferably, Figure 4 As shown, for the conductive elements 1211 arranged along the second direction (vertical direction shown in the figure) of the two-dimensional array, they are divided into multiple groups along the first direction, and the following operations are performed simultaneously for each group of conductive elements 1211 of the multiple groups of conductive elements 1211:

[0107] A driving electrical signal is sequentially applied to a mutual capacitor formed by two adjacent conductive elements 1211 , and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0108] For the battery safety detection device in each of the above embodiments, preferably, Figure 4 As shown, for the conductive elements 1211 arranged along the second direction (vertical direction shown in the figure) of the two-dimensional array, they are divided into multiple groups along the first direction, and the following operations are performed in sequence for each group of conductive elements 1211:

[0109] A driving electrical signal is sequentially applied to a mutual capacitor formed by two adjacent conductive elements 1211 , and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0110] For the battery safety detection device in each of the above embodiments, preferably, Figure 4 As shown, for the conductive elements 1211 arranged along the first direction (the horizontal direction shown in the figure) of the two-dimensional array, they are divided into multiple groups along the second direction, and the following operations are performed simultaneously for each group of conductive elements 1211 of the multiple groups of conductive elements 1211:

[0111] A driving electrical signal is sequentially applied to a mutual capacitor formed by two conductive elements 1211 with a predetermined conductive element interval, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0112] For the battery safety detection device in each of the above embodiments, preferably, Figure 4 As shown, for the conductive elements 1211 arranged along the second direction (vertical direction shown in the figure) of the two-dimensional array, they are divided into multiple groups along the first direction, and the following operations are performed simultaneously for each group of conductive elements 1211 of the multiple groups of conductive elements 1211:

[0113] A driving electrical signal is sequentially applied to a mutual capacitor formed by two conductive elements 1211 with a predetermined conductive element interval, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0114] For the battery safety detection device in each of the above embodiments, preferably, Figure 4 As shown, for the conductive elements 1211 arranged along the first direction (the horizontal direction shown in the figure) of the two-dimensional array, they are divided into multiple groups along the second direction, and the following operations are performed in sequence for each group of conductive elements 1211 of the multiple groups of conductive elements 1211:

[0115] A driving electrical signal is sequentially applied to a mutual capacitor formed by two conductive elements 1211 with a predetermined conductive element interval, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0116] For the battery safety detection device in each of the above embodiments, preferably, Figure 4 As shown, for the conductive elements 1211 arranged along the second direction (vertical direction shown in the figure) of the two-dimensional array, they are divided into multiple groups along the first direction, and the following operations are performed in sequence for each group of conductive elements 1211:

[0117] A driving electrical signal is sequentially applied to a mutual capacitor formed by two conductive elements 1211 with a predetermined conductive element interval, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

[0118] Figures 7 to 9 A schematic structural diagram of a strain sensing device 121 according to another embodiment of the present disclosure is shown.

[0119] like Figures 7 to 9 As shown, the two-dimensional array of strain sensing devices 121 of the strain sensing part 12 of the battery safety detection device includes a first sub-array (V1, V2, V3, V4) and a second sub-array (H1, H2, H3, H4), and the first sub-array and the second sub-array are arranged in the same plane area;

[0120] The first sub-array includes a plurality of first series-connected conductive element groups (V1, V2, V3, V4), the first series-connected conductive element groups include a plurality of conductive elements connected in series along a first direction, and the plurality of first series-connected conductive element groups are arranged along a second direction; each first series-connected conductive element group is insulated from another first series-connected conductive element group;

[0121] The second sub-array includes a plurality of second series-connected conductive element groups (H1, H2, H3, H4), each of which includes a plurality of conductive elements connected in series along a second direction, and the plurality of second series-connected conductive element groups are arranged along the first direction; each second series-connected conductive element group is insulated from another;

[0122] The first sub-array is insulated from the second sub-array;

[0123] The first direction and the second direction are perpendicular to each other.

[0124] Those skilled in the art should understand that Figure 3 , Figure 5 The strain sensing device 121 shown in FIG. Figures 7 to 9 The strain sensing device 121 is shown in FIG.

[0125] Those skilled in the art should understand that Figures 7 to 9 The number of first series conductive element groups of the first sub-array and the number of second series conductive element groups of the second sub-array shown in FIG. 1 are merely exemplary.

[0126] In the battery safety detection device of this embodiment, the shape of the conductive elements of the first sub-array is the same as the shape of the conductive elements of the second sub-array.

[0127] The conductive element may be of the type Figures 7 to 9 The diamond shape in the figure can also be other shapes. Figures 7 to 9 The shapes of the conductive elements shown in FIG. 1 are merely preferred shapes.

[0128] For the battery safety detection device of the above embodiment, preferably, a driving electrical signal is simultaneously applied to all first series conductive element groups of the first subarray and all second series conductive element groups of the second subarray, and the self-capacitance of all first series conductive element groups of the first subarray and all second series conductive element groups of the second subarray is simultaneously measured, and a self-capacitance change signal is generated if the self-capacitance changes.

[0129] For the battery safety detection device of the above embodiment, preferably, the deformation position of the two-dimensional array is determined based on the position information of the first series conductive element group whose self-capacitance of at least one of the first sub-arrays changes in the first sub-array and the position information of the second series conductive element group whose self-capacitance of at least one of the second sub-arrays changes in the second sub-array.

[0130] For the battery safety detection device of the above embodiment, preferably, a driving electrical signal is simultaneously applied to all first series conductive element groups of the first subarray and all second series conductive element groups of the second subarray, and the mutual capacitance of each mutual capacitor formed by each first series conductive element group of the first subarray and each second series conductive element group of the second subarray is simultaneously measured, and if the mutual capacitance changes, a mutual capacitance change signal is generated.

[0131] For the battery safety detection device of the above embodiment, preferably, the deformation position of the two-dimensional array is determined based on the position information of the first series conductive element group of the mutual capacitor whose mutual capacitance changes in the first subarray, and the position information of the second series conductive element group in the second subarray.

[0132] For the battery safety detection device in each of the above embodiments, Figure 3 and Figure 5 As shown, the strain sensing portion 12 further includes a first substrate layer 125 and a second substrate layer 126 , and the strain sensing device 121 is disposed between the first substrate layer 125 and the second substrate layer 126 , and is held by the first substrate layer 125 and the second substrate layer 126 .

[0133] Preferably, the first substrate layer 125 and the second substrate layer 126 are both made of insulating materials.

[0134] Preferably, both the first substrate layer 125 and the second substrate layer 126 are flexible substrates.

[0135] Preferably, the two strain sensing devices 121 are respectively disposed on the first substrate layer 125 and the second substrate layer 126 .

[0136] According to the battery safety detection device of the preferred embodiment of the present disclosure, the strain sensing portion 12 further includes a support portion 124 , and the support portion 124 is disposed between the first substrate layer 125 and the second substrate layer 126 .

[0137] Preferably, the support portion 124 is disposed at the edge of the first substrate layer 125 and the second substrate layer 126 .

[0138] The support portion 124 includes a plurality of separate support portions, or the support portion 124 is an integrated structure.

[0139] The strain sensing unit 12 of the battery safety detection device in each of the above-mentioned embodiments can be disposed between two adjacent batteries 11 .

[0140] The strain sensing unit 12 of the battery safety detection device in each of the above-mentioned embodiments can be disposed between the battery 11 and the housing 15 , and the strain sensing unit 12 can also generate a strain electrical signal based on the deformation of the housing 15 of the battery device 10 .

[0141] For the battery safety detection device in each of the above embodiments, preferably, Fig.11 As shown, the battery safety detection device further includes a driving detection unit 13 , which applies a driving electrical signal to the strain sensing unit 12 and detects the strain electrical signal generated by the strain sensing unit 12 .

[0142] Preferably, the drive detection unit 13 includes:

[0143] A driving circuit, the driving circuit is used to provide a driving electrical signal to the strain sensing part 12; a detection circuit, the detection circuit is used to detect the strain electrical signal; and a controller, the controller controls the driving circuit to provide a driving signal to the strain sensing part 12, and processes the strain electrical signal obtained by the detection circuit to generate a processed strain electrical signal.

[0144] Preferably, the drive detection unit 13 further includes a memory, which stores the strain electrical signal processed by the controller.

[0145] The present disclosure also provides a battery management system, comprising the battery safety detection device of any one of the above embodiments. Fig.12 The battery management system is shown, wherein the drive detection unit 13 described above can be integrated into a chip, and the pins of the chip are connected to the strain sensing unit 1201. The battery safety detection device in the present disclosure can also be referred to as a battery deformation detection device.

[0146] 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" etc. 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 representations 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 any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0147] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0148] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A battery safety detection device, characterized in that: include: at least one strain sensing portion, the at least one strain sensing portion being disposed on at least one surface of a battery of the battery device, the strain sensing portion being capable of generating a strain electrical signal based on at least a deformation of the battery of the battery device, the strain electrical signal at least indicating the occurrence of the deformation; Wherein, the strain sensing part includes at least one strain sensing device, the strain sensing device includes a plurality of conductive elements, the plurality of conductive elements are uniformly arranged in a two-dimensional array, and each conductive element is insulated from other conductive elements; the strain sensing device can respond to the deformation of the battery to cause the position of the two-dimensional array corresponding to the deformation of the battery to deform, and the strain sensing part generates the strain electrical signal based on the deformation of the two-dimensional array; the strain electrical signal includes the self-capacitance of any conductive element in the two-dimensional array and the mutual capacitance change signal between it and any other conductive element.

2. The battery safety detection device according to claim 1, characterized in that: The two-dimensional array includes a plurality of conductive elements arranged along a first direction and a plurality of conductive elements arranged along a second direction, wherein the first direction is perpendicular to the second direction.

3. The battery safety detection device according to claim 1, characterized in that: The strain sensing portion includes two strain sensing devices, the two strain sensing devices are arranged opposite to each other, and an insulating gap is arranged between the two strain sensing devices.

4. The battery safety detection device according to claim 3, characterized in that: The insulating gap is filled with a flexible insulating material.

5. The battery safety detection device according to claim 1, characterized in that: A driving electrical signal is simultaneously applied to all the conductive elements of the strain sensing device, and the self-capacitance of each conductive element is measured simultaneously. If the self-capacitance of the conductive element changes, a self-capacitance change signal is generated.

6. The battery safety detection device according to claim 1, characterized in that: A driving electrical signal is applied to each conductive element of all conductive elements of the strain sensing device in sequence, and the self-capacitance of each conductive element is measured in sequence, and a self-capacitance change signal is generated if the self-capacitance of the conductive element changes.

7. The battery safety detection device according to claim 5 or 6, characterized in that: The degree of deformation is determined based on the magnitude of the self-capacitance change signal, and the position of deformation is determined based on the position of the conductive element whose self-capacitance has changed in the two-dimensional array.

8. The battery safety detection device according to claim 2, characterized in that: The conductive elements of the two-dimensional array arranged along the first direction are divided into multiple groups along the second direction, and the following operations are performed simultaneously on each of the multiple groups of conductive elements: A driving electrical signal is sequentially applied to a mutual capacitor formed by any two conductive elements, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

9. The battery safety detection device according to claim 2, characterized in that: The conductive elements of the two-dimensional array arranged along the second direction are divided into multiple groups along the first direction, and the following operations are performed simultaneously on each of the multiple groups of conductive elements: A driving electrical signal is sequentially applied to a mutual capacitor formed by any two conductive elements, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

10. The battery safety detection device according to claim 2, characterized in that: The conductive elements of the two-dimensional array arranged along the first direction are divided into multiple groups along the second direction, and the following operations are performed in sequence on each of the multiple groups of conductive elements: A driving electrical signal is sequentially applied to a mutual capacitor formed by any two conductive elements, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

11. The battery safety detection device according to claim 2, characterized in that: The conductive elements of the two-dimensional array arranged along the second direction are divided into multiple groups along the first direction, and the following operations are performed in sequence on each of the multiple groups of conductive elements: A driving electrical signal is sequentially applied to a mutual capacitor formed by any two conductive elements, and the mutual capacitance is measured. If the mutual capacitance changes, a mutual capacitance change signal is generated.

12. The battery safety detection device according to claim 1, characterized in that: The two-dimensional array includes a first sub-array V and a second sub-array H, and the first sub-array V and the second sub-array H are arranged in the same plane area; The first subarray V includes a plurality of first series-connected conductive element groups, the first series-connected conductive element groups include a plurality of conductive elements connected in series along a first direction, and the plurality of first series-connected conductive element groups are arranged along a second direction; each first series-connected conductive element group is insulated from another first series-connected conductive element group; The second sub-array H includes a plurality of second series-connected conductive element groups, the second series-connected conductive element groups include a plurality of conductive elements connected in series along a second direction, and the plurality of second series-connected conductive element groups are arranged along a first direction; each second series-connected conductive element group is insulated from another; The first sub-array is insulated from the second sub-array; The first direction and the second direction are perpendicular to each other.

13. The battery safety detection device according to claim 12, characterized in that: The shape of the conductive elements of the first sub-array is the same as the shape of the conductive elements of the second sub-array.

14. The battery safety detection device according to claim 12, characterized in that: A driving electrical signal is simultaneously applied to all first series conductive element groups of the first subarray and all second series conductive element groups of the second subarray, and the self-capacitance of all first series conductive element groups of the first subarray and all second series conductive element groups of the second subarray is simultaneously measured, and a self-capacitance change signal is generated if the self-capacitance changes.

15. The battery safety detection device according to claim 14, characterized in that: The deformation position of the two-dimensional array is determined based on the position information of at least one first series conductive element group with changed self-capacitance of the first subarray in the first subarray and the position information of at least one second series conductive element group with changed self-capacitance of the second subarray in the second subarray.

16. The battery safety detection device according to claim 14, characterized in that: A driving electrical signal is simultaneously applied to all first series conductive element groups of the first subarray and all second series conductive element groups of the second subarray, and the mutual capacitance of each mutual capacitor formed by each first series conductive element group of the first subarray and each second series conductive element group of the second subarray is simultaneously measured, and a mutual capacitance change signal is generated if the mutual capacitance changes.

17. The battery safety detection device according to claim 16, characterized in that: The deformation position of the two-dimensional array is determined based on the position information of the first series conductive element group of the mutual capacitor whose mutual capacitance changes in the first subarray and the position information of the second series conductive element group in the second subarray.

18. The battery safety detection device according to claim 1 or 2, characterized in that: The strain sensing portion further includes a first substrate layer and a second substrate layer. The strain sensing device is disposed between the first substrate layer and the second substrate layer and is held by the first substrate layer and the second substrate layer.

19. The battery safety detection device according to claim 18, characterized in that: The first substrate layer and the second substrate layer are both made of insulating materials.

20. The battery safety detection device according to claim 19, characterized in that: The first substrate layer and the second substrate layer are both flexible substrates.

21. The battery safety detection device according to claim 3 or 4, characterized in that: The strain sensing portion further includes a first substrate layer and a second substrate layer, and the two strain sensing devices are respectively arranged on the first substrate layer and the second substrate layer.

22. The battery safety detection device according to claim 21, characterized in that: The strain sensing portion further includes a supporting portion, and the supporting portion is disposed between the first substrate layer and the second substrate layer.

23. The battery safety detection device according to claim 22, characterized in that: The support portion is disposed at edges of the first substrate layer and the second substrate layer.

24. The battery safety detection device according to claim 22, characterized in that: The support portion includes a plurality of separate support portions, or the support portion is an integral structure.

25. The battery safety detection device according to claim 21, characterized in that: The first substrate layer and the second substrate layer are both made of insulating materials.

26. The battery safety detection device according to claim 21, characterized in that: The first substrate layer and the second substrate layer are both made of flexible materials.

27. The battery safety detection device according to claim 1, characterized in that: The strain sensing portion can be disposed between two adjacent batteries.

28. The battery safety detection device according to claim 1, characterized in that: The strain sensing portion can be disposed between the battery and the housing.

29. The battery safety detection device according to claim 1, characterized in that: The strain sensing unit can also generate the strain electrical signal based on the deformation of the housing of the battery device.

30. The battery safety detection device according to claim 1, characterized in that: The device further comprises a driving detection unit, which applies a driving electrical signal to the strain sensing unit and detects the strain electrical signal generated by the strain sensing unit.

31. The battery safety detection device according to claim 30, characterized in that: The drive detection unit comprises: A driving circuit, the driving circuit is used to provide a driving electrical signal to the strain sensing part; a detection circuit, the detection circuit being used to detect the strain electrical signal; and A controller controls the driving circuit to provide a driving signal to the strain sensing part, and processes the strain electrical signal obtained by the detection circuit to generate a processed strain electrical signal.

32. The battery safety detection device according to claim 31, characterized in that: The drive detection unit further includes a memory, and the memory stores the strain electrical signal processed by the controller.

33. A battery management system, characterized in that: include: A battery safety detection device as claimed in any one of claims 1 to 32.

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