WO2022155910A1

WO2022155910A1 - Battery deformation detection apparatus and battery management system

Info

Publication number: WO2022155910A1
Application number: PCT/CN2021/073355
Authority: WO
Inventors: 周号
Original assignee: 珠海迈巨微电子有限责任公司
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2022-07-28

Abstract

The present disclosure provides a battery deformation detection apparatus, comprising: at least one strain sensing portion, the at least one strain sensing portion being disposed on at least one surface of a battery of a battery apparatus, the strain sensing portion being at least able to generate a strain electrical signal on the basis of a deformation of the battery of the battery apparatus, and the strain electrical signal at least indicating occurrence of the deformation. The strain sensing portion comprises at least one strain sensing device; the strain sensing device comprises a first conductive layer and a second conductive layer; there is a preset spacing between the first conductive layer and the second conductive layer; the first conductive layer or the second conductive layer can respond to the deformation of the battery such that a preset spacing between a position of the first conductive layer corresponding to the deformation and a position of the second conductive layer corresponding to the deformation changes; the strain electrical signal is generated on the basis of the change of the preset spacing. The present disclosure further provides a battery management system.

Description

Battery deformation detection device and battery management system

technical field

The present disclosure belongs to the technical field of battery safety detection, and in particular, the present disclosure relates to a battery deformation detection device and a battery management system.

Background technique

Lithium batteries will be deformed when subjected to external force, and bulging will also occur after the battery ages. When the above problems occur in the lithium battery, problems such as internal short circuit, fire and explosion will occur. Therefore, safety testing of lithium batteries is a must.

How to effectively and accurately detect the deformation of the battery and how to predict the failure of the battery is a problem that needs to be solved in the field of battery safety.

SUMMARY OF THE INVENTION

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

According to one aspect of the present disclosure, there is provided a battery deformation detection device, comprising:

at least one strain sensing portion provided on at least one surface of the battery of the battery device, the strain sensing portion capable of generating a strain electrical signal at least based on the deformation of the battery of the battery device, the strain electrical signal at least indicate the occurrence of said deformation;

Wherein, the strain sensing portion includes at least one strain sensing device, the strain sensing device includes a first conductive layer and a second conductive layer, and there is a preset distance between the first conductive layer and the second conductive layer, The first conductive layer or the second conductive layer can respond to the deformation of the battery so that there is a gap between the position of the first conductive layer corresponding to the deformation and the position of the second conductive layer corresponding to the deformation The preset interval of , changes, and the strain electrical signal is generated based on the change of the preset interval.

According to the battery deformation detection device of at least one embodiment of the present disclosure, a first driving voltage is applied to both ends of the first conductive layer, and current sensing is performed on the two ends of the first conductive layer, based on the sensing The change of the measured current determines the change of the preset distance between the first conductive layer and the second conductive layer;

Alternatively, a second driving voltage is applied to both ends of the second conductive layer, current sensing is performed on the two ends of the second conductive layer, and the first conductive layer is determined based on the change of the sensed current the change of the preset spacing with the second conductive layer;

Alternatively, a first driving voltage is applied to both ends of the first conductive layer, current sensing is performed on both ends of the first conductive layer, and a second driving voltage is applied to both ends of the second conductive layer voltage, and current sensing is performed on the two ends of the second conductive layer, based on the change of the current at the two ends of the first conductive layer and the change of the current at the two ends of the second conductive layer judging the change of the preset distance between the first conductive layer and the second conductive layer;

The strained electrical signal includes a change in the current.

The battery deformation detection device according to at least one embodiment of the present disclosure further includes a signal detection unit that detects the electrical strain signal generated by the strain sensing unit.

According to the battery deformation detection device of at least one embodiment of the present disclosure, a first driving current is applied to both ends of the first conductive layer, and voltage sensing is performed on the two ends of the first conductive layer, based on the sensing The change of the measured voltage determines the change of the preset distance between the first conductive layer and the second conductive layer;

Alternatively, a second driving current is applied to both ends of the second conductive layer, voltage sensing is performed on the two ends of the second conductive layer, and the first conductive layer is determined based on a change in the sensed voltage the change of the preset spacing with the second conductive layer;

Alternatively, a first driving current is applied to both ends of the first conductive layer, voltage sensing is performed on both ends of the first conductive layer, and a second driving current is applied to both ends of the second conductive layer current, and voltage sensing is performed on the two ends of the second conductive layer, based on the change of the voltage at the two ends of the first conductive layer and the change of the voltage at the two ends of the second conductive layer judging the change of the preset distance between the first conductive layer and the second conductive layer;

The strained electrical signal includes a change in the voltage.

The battery deformation detection device according to at least one embodiment of the present disclosure further includes a signal detection unit, the signal detection unit measures the mutual capacitance formed by the first conductive layer and the second conductive layer, and based on the mutual capacitance The change in capacitance determines the change in the preset distance; the electrical strain signal includes the change in the mutual capacitance.

According to the battery deformation detection device of at least one embodiment of the present disclosure, a first driving voltage is applied to both ends of the first conductive layer, voltage sensing is performed on the second conductive layer, and a determination is made based on whether a sensing voltage is generated Whether the first conductive layer is in contact with the second conductive layer.

According to the battery deformation detection device according to at least one embodiment of the present disclosure, a second driving voltage is applied to both ends of the second conductive layer, voltage sensing is performed on the first conductive layer, and a determination is made based on whether a sensing voltage is generated Whether the first conductive layer is in contact with the second conductive layer.

According to the battery deformation detection device of at least one embodiment of the present disclosure, a driving voltage is alternately applied to both ends of the first conductive layer and both ends of the second conductive layer. When a driving voltage is applied to the terminals, voltage sensing is performed on the second conductive layer, and when a driving voltage is applied to both ends of the second conductive layer, voltage sensing is performed on the first conductive layer;

At least based on the magnitude of the sensing voltage generated when the voltage sensing is performed on the first conductive layer and the magnitude of the sensing voltage generated when the voltage sensing is performed on the second conductive layer, it is determined that the first conductive layer and the The contact position of the second conductive layer.

According to the battery deformation detection device of at least one embodiment of the present disclosure, both ends of the first conductive layer to which the driving voltage is applied are both ends in the first direction, and both ends of the second conductive layer to which the driving voltage is applied are the second ends. Both ends in the direction, the first direction is perpendicular to the second direction.

According to the battery deformation detection device according to at least one embodiment of the present disclosure, the first conductive layer includes a plurality of first conductive strips arranged in a first direction, and two adjacent first conductive strips are insulated. The two conductive layers include a plurality of second conductive strips arranged along a second direction, two adjacent second conductive strips are insulated, and the first direction is perpendicular to the second direction.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the second driving voltage is applied to both ends of all the second conductive strips of the second conductive layer, and the second driving voltage is applied to all the first conductive strips of the first conductive layer. Perform voltage sensing, determine whether the first conductive layer and the second conductive layer are in contact based on whether a sensing voltage is generated, and determine based on the position of at least one first conductive strip that generates the sensing voltage in the first conductive layer The contact position of the first conductive layer and the second conductive layer.

According to the battery deformation detection device of at least one embodiment of the present disclosure, a first driving voltage is applied to both ends of all the first conductive strips of the first conductive layer, and a first driving voltage is applied to all the second conductive strips of the second conductive layer Perform voltage sensing, determine whether the first conductive layer and the second conductive layer are in contact based on whether a sensing voltage is generated, and determine based on the position of at least one second conductive strip that generates the sensing voltage in the second conductive layer The contact position of the first conductive layer and the second conductive layer.

According to the battery deformation detection device of at least one embodiment of the present disclosure, driving is alternately applied to both ends of all the first conductive strips of the first conductive layer and both ends of all the second conductive strips of the second conductive layer Voltage;

When a driving voltage is applied to both ends of all the first conductive strips of the first conductive layer, voltage sensing is performed on all the second conductive strips of the second conductive layer. When a driving voltage is applied to both ends of the second conductive strip, voltage sensing is performed on all the first conductive strips of the first conductive layer;

Obtaining the first conductive layer and the second conductive layer based on at least the position of the at least one second conductive strip that generates the sensing voltage in the second conductive layer and the position of the at least one first conductive strip that generates the sensing voltage in the first conductive layer At least one contact location of the conductive layer.

The battery deformation detection device according to at least one embodiment of the present disclosure further includes a signal detection part, the signal detection part measures the mutual capacitance formed between each of the first conductive strips and each of the second conductive strips, based on at least one mutual capacitance The change in capacitance determines the position where the preset distance between the first conductive layer and the second conductive layer changes, so as to determine at least one deformation position of the battery.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the first conductive layer includes a first rectangular conductive element array, and the first conductive elements of the first rectangular conductive element array are insulated from each other, and the second conductive layer It includes a second rectangular conductive element array, each second conductive element of the second rectangular conductive element array is insulated, and each first conductive element of the first rectangular conductive element array is opposite to each second conductive element of the second rectangular conductive element array set up.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the second driving voltage is applied to all the second conductive elements of the second conductive layer, and the voltage sensing is performed to all the first conductive elements of the first conductive layer testing, determining whether the first conductive layer and the second conductive layer are in contact based on whether a sensing voltage is generated, and determining the first conductive layer based on the position of the at least one first conductive element generating the sensing voltage in the first conductive layer The contact position of the layer with the second conductive layer.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the first driving voltage is applied to all the first conductive elements of the first conductive layer, and the voltage sensing is performed to all the second conductive elements of the second conductive layer testing, determining whether the first conductive layer and the second conductive layer are in contact based on whether a sensing voltage is generated, and determining the first conductive layer based on the position of at least one second conductive element generating the sensing voltage in the second conductive layer The contact position of the layer with the second conductive layer.

According to the battery deformation detection device of at least one embodiment of the present disclosure, a driving voltage is alternately applied to all the first conductive elements of the first conductive layer and to all the second conductive elements of the second conductive layer;

When a driving voltage is applied to all the first conductive elements of the first conductive layer, voltage sensing is performed on all the second conductive elements of the second conductive layer, and when a driving voltage is applied to all the second conductive elements of the second conductive layer When a driving voltage is applied to the elements, voltage sensing is performed on all the first conductive elements of the first conductive layer;

Obtaining the first conductive layer and the second conductive layer based on at least the position of the at least one second conductive element that generates the sensing voltage in the second conductive layer and the position of the at least one first conductive element that generates the sensing voltage in the first conductive layer At least one contact location of the conductive layer.

The battery deformation detection device according to at least one embodiment of the present disclosure further includes a signal detection part, the signal detection part detects first conductive elements disposed opposite to the first rectangular conductive element array and the second rectangular conductive element array. The mutual capacitance formed by the element and the second conductive element is measured, and the position where the preset distance between the first conductive layer and the second conductive layer changes is determined based on the change of at least one mutual capacitance to determine at least one deformation position of the battery.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the first conductive layer is provided on the first substrate, and the second conductive layer is provided on the second substrate.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the first substrate and the second substrate are both insulating substrates.

According to the battery deformation detection device of at least one embodiment of the present disclosure, both the first substrate and the second substrate are flexible substrates.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the preset distance is formed by a support portion, and the support portion is provided between the first conductive layer and the second conductive layer.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the preset distance is formed by a support portion, and the support portion is provided between the first substrate and the second substrate.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the support portion is provided at an edge of the first conductive layer and the second conductive layer.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the support portion is provided at edges of the first substrate and the second substrate.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the support portion includes a plurality of discrete support portions, or the support portions are of an integrated structure.

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

According to the battery deformation detection device of at least one embodiment of the present disclosure, the strain sensing portion can be provided between the battery and the case.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the strain sensing part can also generate the strain electrical signal based on the deformation of the casing of the battery device.

According to the battery deformation detection device according to at least one embodiment of the present disclosure, the signal detection part includes:

a driving circuit, which is used for providing a driving signal to the strain sensing part;

a detection circuit for detecting the strain electrical signal; and

The controller controls the driving circuit to provide a driving signal to the strain sensing part, and processes the electrical strain signal obtained by the detection circuit to generate a processed electrical strain signal.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the signal detection part further includes a memory, and the memory stores the electric strain signal processed by the controller.

According to the battery deformation detection device according to at least one embodiment of the present disclosure, the driving circuit includes:

a digital-to-analog converter that converts a digital drive signal received from the controller into an analog drive signal;

an amplifier that amplifies the analog drive signal to generate an amplified drive signal; and

A multiplexer including a plurality of signal channels, and a driving signal amplified by the amplifier is applied to the strain sensing portion via one or more of the plurality of signal channels.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the driving signal amplified by the amplifier is applied to the first conductive layer of the strain sensing portion via one or more of the plurality of signal channels. a first conductive strip or a plurality of first conductive strips;

Alternatively, the driving signal amplified by the amplifier is applied to a second conductive strip or a plurality of second conductive strips of the second conductive layer of the strain sensing portion via one or more of the plurality of signal channels .

a multiplexer including a plurality of signal channels, the analog drive signal being output via one or more of the plurality of signal channels; and

A plurality of amplifiers, each of which amplifies an analog drive signal output via one signal channel of the multiplexer, and the amplified analog drive signal is applied to the strain sensing portion.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the analog driving signal output by one or more of the plurality of signal channels is amplified and then applied to the first conductive portion of the strain sensing portion a first conductive strip or a plurality of first conductive strips of the layer;

Or, the analog driving signal output by one or more signal channels of the plurality of signal channels is amplified and then applied to one second conductive strip or a plurality of second conductive layers of the second conductive layer of the strain sensing portion Conductive strip.

According to the battery deformation detection device according to at least one embodiment of the present disclosure, the detection circuit includes:

a sense amplifier, the sense amplifier senses the induced charge of the first conductive layer or the second conductive layer of the strain sensing part, and converts it into an amplified induced voltage; and

an analog-to-digital converter, the analog-to-digital converter performs analog-to-digital conversion on the amplified induced voltage, generates a digital induced voltage and outputs it to the controller, and the digital induced voltage indicates the first conductive voltage Variation in the mutual capacitance between the layer and the second conductive layer.

The battery deformation detection device according to at least one embodiment of the present disclosure further includes a filter disposed between the sense amplifier and the analog-to-digital converter.

a differential amplifier, the differential amplifier amplifies the sensing voltage of the first conductive layer or the second conductive layer of the strain sensing portion to generate an amplified sensing voltage; and

an analog-to-digital converter, which converts the amplified sensing voltage into a digital signal and outputs it to the controller.

According to the battery deformation detection device of at least one embodiment of the present disclosure, the detection circuit further includes a differential anti-aliasing filter, and the differential anti-aliasing filter is provided between the differential amplifier and the analog-to-digital converter.

According to another aspect of the present disclosure, a battery deformation detection device is provided, comprising:

Wherein, the strain sensing portion includes at least one strain sensing device, the strain sensing device includes a first conductive layer and a second conductive layer, and there is a preset distance between the first conductive layer and the second conductive layer, The first conductive layer or the second conductive layer can deform the position of the first conductive layer corresponding to the deformation of the battery or the position of the second conductive layer corresponding to the deformation of the battery in response to the deformation of the battery The position of the strain sensor is deformed, and the strain sensing portion generates the strain electrical signal based on the deformation of the first conductive layer or the deformation of the second conductive layer.

According to yet another aspect of the present disclosure, there is provided a battery management system, comprising: the battery deformation detection device according to any one of the above.

Description of drawings

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

FIG. 1 is a schematic structural diagram of a battery device provided with a battery deformation detection device according to an embodiment of the present disclosure.

FIG. 2 is a schematic structural diagram of a battery device provided with a battery deformation detection device according to still another embodiment of the present disclosure.

FIG. 3 is a schematic structural diagram of a strain sensing portion of a battery strain detection device according to an embodiment of the present disclosure.

4 is a schematic structural diagram of a strain sensing portion of a battery strain detection device according to still another embodiment of the present disclosure.

FIG. 5 is a schematic structural diagram of a strain sensing portion of a battery strain detection device according to still another embodiment of the present disclosure.

6 is a schematic structural diagram of a first conductive layer of a strain sensing portion of a battery strain detection device according to an embodiment of the present disclosure.

7 is a schematic structural diagram of a second conductive layer of a strain sensing portion of a battery strain detection device according to an embodiment of the present disclosure.

8 is a schematic structural diagram of a first conductive layer of a strain sensing portion of a battery strain detection device according to still another embodiment of the present disclosure.

9 is a schematic structural diagram of a second conductive layer of a strain sensing portion of a battery strain detection device according to still another embodiment of the present disclosure.

FIG. 10 is a schematic structural diagram of a signal detection unit of a battery deformation detection device according to an embodiment of the present disclosure.

11 is a schematic structural diagram of a drive circuit of a signal detection unit according to an embodiment of the present disclosure.

12 is a schematic structural diagram of a drive circuit of a signal detection unit according to still another embodiment of the present disclosure.

13 is a schematic structural diagram of a detection circuit of a signal detection unit according to an embodiment of the present disclosure.

14 is a schematic structural diagram of a detection circuit of a signal detection unit according to still another embodiment of the present disclosure.

15 is a schematic structural diagram of a detection circuit of a signal detection unit according to still another embodiment of the present disclosure.

16 is a schematic structural diagram of a detection circuit of a signal detection unit according to still another embodiment of the present disclosure.

17 is a schematic diagram of a battery detection system according to one embodiment of the present disclosure.

Detailed ways

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 used to explain the related content, but not to limit the present disclosure. In addition, it should be noted that, for the convenience of description, only the parts related to the present disclosure are shown in the drawings.

It should be noted that the embodiments of the present disclosure and the features of the embodiments may be combined with each other unless there is conflict. The technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Unless otherwise stated, the illustrated exemplary embodiments/embodiments are to be understood as exemplary features providing various details of some ways in which the technical concept of the present disclosure may be implemented in practice. Therefore, unless otherwise stated, the features of various embodiments/embodiments may be additionally combined, separated, interchanged and/or rearranged without departing from the technical concept of the present disclosure.

The use of cross-hatching and/or hatching in the drawings is generally used to clarify boundaries between adjacent components. As such, unless stated, the presence or absence of cross-hatching or shading does not convey or represent any particular material, material properties, dimensions, proportions, commonalities between the illustrated components and/or any other characteristics of the components, any preferences or requirements for attributes, properties, etc. Furthermore, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. When example embodiments may be implemented differently, the specific process sequence may be performed in a different order than described. For example, two consecutively described processes may be performed substantially concurrently or in the reverse order of that described. In addition, the same reference numerals denote the same components.

When an element is referred to as being "on" or "over", "connected to" or "coupled to" another element, the element can be directly on, directly connected to, the other element Either directly coupled to the other component, or intermediate components may be present. However, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements present. To this end, the term "connected" may refer to a physical connection, electrical connection, etc., with or without intervening components.

For descriptive purposes, the present disclosure may use terms such as "under", "under", "under", "under", "above", "on", "at" Spatially relative terms such as "above," "higher," and "side (eg, as in "sidewall")" to describe one element to another (other) element as shown in the figures Relationship. In addition to the orientation depicted in the figures, spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "under" can encompass both an orientation of "above" and "below." In addition, the device may be otherwise oriented (eg, rotated 90 degrees or at other orientations) and, as such, the spatially relative descriptors used herein should be interpreted accordingly.

The present disclosure provides a battery deformation detection device, wherein the battery deformation detection device can at least be used to detect the deformation of the battery, wherein the deformation can be the battery bulge-type deformation, or the deformation formed after the battery is externally squeezed. The cause of the external squeeze may include, for example, a collision or acceleration, or the like.

FIG. 1 is a schematic structural diagram of a battery device provided with a battery deformation detection device according to an embodiment of the present disclosure. FIG. 2 is a schematic structural diagram of a battery device provided with a battery deformation detection device according to still another embodiment of the present disclosure. FIG. 3 is a schematic structural diagram of a strain sensing portion of a battery strain detection device according to an embodiment of the present disclosure. 4 is a schematic structural diagram of a strain sensing portion of a battery strain detection device according to still another embodiment of the present disclosure. FIG. 5 is a schematic structural diagram of a strain sensing portion of a battery strain detection device according to still another embodiment of the present disclosure. 6 is a schematic structural diagram of a first conductive layer of a strain sensing portion of a battery strain detection device according to an embodiment of the present disclosure. 7 is a schematic structural diagram of a second conductive layer of a strain sensing portion of a battery strain detection device according to an embodiment of the present disclosure. 8 is a schematic structural diagram of a first conductive layer of a strain sensing portion of a battery strain detection device according to still another embodiment of the present disclosure. 9 is a schematic structural diagram of a second conductive layer of a strain sensing portion of a battery strain detection device according to still another embodiment of the present disclosure. FIG. 10 is a schematic structural diagram of a signal detection unit of a battery deformation detection device according to an embodiment of the present disclosure.

The battery deformation detection device and the battery management system of the present disclosure will be described in detail below with reference to FIGS. 1 to 10 .

According to an embodiment of the present disclosure, the battery deformation detection device includes:

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 can at least generate a strain electrical signal based on the deformation of the battery 11 of the battery device 10 . The signal at least indicates the occurrence of deformation;

Wherein, the strain sensing portion 12 includes at least one strain sensing device 120, the strain sensing device 120 includes a first conductive layer 121 and a second conductive layer 122, and there is a predetermined distance 123 between the first conductive layer 121 and the second conductive layer 122, The first conductive layer 121 or the second conductive layer 122 can respond to the deformation of the battery 11 to make a preset between the position of the first conductive layer 121 corresponding to the deformation and the position of the second conductive layer 122 corresponding to the deformation The distance 123 changes, and a strain electrical signal is generated based on the change of the preset distance 123 .

The first conductive layer 121 and the second conductive layer 122 have matching sizes, and both the first conductive layer 121 and the second conductive layer 122 can be sheet-shaped conductive films, such as ITO (indium tin oxide) conductive layers.

As can be seen from FIG. 1 , 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. It can be seen from FIG. 2 that the battery device 10 includes a plurality of batteries 11, and FIG. 2 exemplarily shows four batteries 11. The batteries 11 may be a battery pack including a plurality of battery cells, or may be a battery cell.

The battery deformation detection device shown in FIG. 1 has four strain sensing parts 12 , and the four strain sensing parts 12 are respectively disposed between the four side surfaces of the battery 11 and the casing 15 . The strain sensing portion 12 may also be provided between the top surface of the battery 11 and the case 15 , or may be provided between the bottom surface of the battery 11 and the case 15 .

In the battery device 10 shown in FIG. 2 , the strain sensing portion 12 is provided between each battery 11 , and the strain sensing portion 12 is also provided between the side surface of the battery 11 and the case 15 .

Those skilled in the art should understand that the numbers of the batteries 11 and the arrangement positions of the strain sensing parts 12 shown in FIG. 1 and FIG. 2 are all exemplary.

FIG. 3 shows a schematic structural diagram of the strain sensing portion 12 according to an embodiment of the present disclosure. The first conductive layer 121 and the second conductive layer 122 may be two sheet-shaped conductive films disposed opposite to each other.

According to the battery deformation detection device according to an embodiment of the present disclosure, a first driving voltage is applied to both ends of the first conductive layer 121, and current sensing is performed on both ends of the first conductive layer 121, based on the change of the sensed current Determine the change of the preset distance 123 between the first conductive layer 121 and the second conductive layer 122; or, apply a second driving voltage to both ends of the second conductive layer 122, and perform Current sensing, judging the change of the preset distance 123 between the first conductive layer 121 and the second conductive layer 122 based on the change of the sensed current; or, applying a first driving voltage to both ends of the first conductive layer 121, and perform current sensing on both ends of the first conductive layer 121, apply a second driving voltage to both ends of the second conductive layer 122, and perform current sensing on both ends of the second conductive layer 122, based on the first conductive layer The change of the current at both ends of 121 and the change of the current at both ends of the second conductive layer 122 determines the change of the preset distance 123 between the first conductive layer 121 and the second conductive layer 122 .

In this embodiment, the electrical strain signal includes a change in current.

The first conductive layer 121 and the second conductive layer 122 can both be resistance strain devices. When the deformation of the battery 11 or the deformation of the casing 15 causes the deformation of the first conductive layer 121 or the second conductive layer 122, the first conductive layer 121 Or the resistance value of the second conductive layer 122 will change, therefore, the above-mentioned sensing current will change, and the deformation of the battery 11 or the casing 15 can be indicated based on the change of the sensing current.

In the above embodiment, preferably, the battery deformation detection device further includes a signal detection unit 13 , and the signal detection unit 13 detects the electrical strain signal generated by the strain sensing unit 12 .

According to the battery deformation detection device according to still another embodiment of the present disclosure, the first driving current is applied to both ends of the first conductive layer 121, and voltage sensing is performed on both ends of the first conductive layer 121, based on the sensed voltage The change determines the change of the preset distance 123 between the first conductive layer 121 and the second conductive layer 122; Perform voltage sensing, and determine the change of the preset distance 123 between the first conductive layer 121 and the second conductive layer 122 based on the change of the sensed voltage; or, apply a first driving current to both ends of the first conductive layer 121 , and perform voltage sensing on both ends of the first conductive layer 121, apply a second driving current to both ends of the second conductive layer 122, and perform voltage sensing on both ends of the second conductive layer 122, based on the first conductive layer The variation of the voltage across the layer 121 and the variation of the voltage across the second conductive layer 122 determines the variation of the preset distance 123 between the first conductive layer 121 and the second conductive layer 122 .

In this embodiment, the electrical strain signal includes a change in voltage.

The first conductive layer 121 and the second conductive layer 122 can both be resistance strain devices. When the deformation of the battery 11 or the deformation of the casing 15 causes the deformation of the first conductive layer 121 or the second conductive layer 122, the first conductive layer 121 Or the resistance value of the second conductive layer 122 will change, therefore, the above-mentioned sensing voltage will change, and the deformation of the battery 11 or the case 15 can be indicated based on the change of the sensing voltage.

According to a battery deformation detection device according to still another embodiment of the present disclosure, the battery deformation detection device includes: at least one strain sensing part 12, the at least one strain sensing part 12 is disposed on at least one surface of the battery 11 of the battery device 10, and the strain sensing part 12 The part 12 can at least generate a strain electric signal based on the deformation of the battery 11 of the battery device 10, and the strain electric signal at least indicates the occurrence of deformation; wherein, the strain sensing part 12 includes at least one strain sensing device 120, and the strain sensing device 120 includes a first conductive layer 121 and the second conductive layer 122, there is a preset distance 123 between the first conductive layer 121 and the second conductive layer 122, the first conductive layer 121 or the second conductive layer 122 can respond to the deformation of the battery 11 to make the first conductive layer The preset spacing 123 between the position of the layer 121 corresponding to the deformation and the position corresponding to the deformation of the second conductive layer 122 changes, and a strain electrical signal is generated based on the change of the preset spacing 123; the battery deformation detection device further includes: The signal detection unit 13 measures the mutual capacitance formed by the first conductive layer 121 and the second conductive layer 122, and determines the change of the preset distance 123 based on the change of the mutual capacitance.

In this embodiment, the strain electrical signal includes changes in mutual capacitance.

Wherein, the signal detection unit 13 may include a capacitance measurement circuit in the prior art.

According to the battery deformation detection device according to another embodiment of the present disclosure, the first driving voltage is applied to both ends of the first conductive layer 121 , the voltage sensing is performed on the second conductive layer 122 , and the first driving voltage is determined based on whether the sensing voltage is generated or not. Whether the conductive layer 121 and the second conductive layer 122 are in contact.

That is, if the sensing voltage is generated, it means that contact has occurred between the first conductive layer 121 and the second conductive layer due to the deformation of the battery 11 or the deformation of the case 15 .

According to the battery deformation detection device according to still another embodiment of the present disclosure, the second driving voltage is applied to both ends of the second conductive layer 122 , the voltage sensing is performed on the first conductive layer 121 , and the first conductive layer 121 is determined based on whether the sensing voltage is generated or not. Whether the conductive layer 121 and the second conductive layer 122 are in contact.

According to the battery deformation detection device according to the preferred embodiment of the present disclosure, the driving voltage is alternately applied to both ends of the first conductive layer 121 and the two ends of the second conductive layer 122 . When the driving voltage is applied to both ends of the first conductive layer 121 When the voltage is sensed on the second conductive layer 122, when a driving voltage is applied to both ends of the second conductive layer 122, the voltage sensing is performed on the first conductive layer 121; at least based on the voltage sensing on the first conductive layer 121 The magnitude of the sensing voltage generated by timing and the magnitude of the sensing voltage generated when voltage sensing is performed on the second conductive layer 122 is used to determine the contact position between the first conductive layer 121 and the second conductive layer 122 .

The two ends of the first conductive layer 121 to which the driving voltage is applied are the two ends in the first direction, the two ends of the second conductive layer 122 to which the driving voltage is applied are the two ends in the second direction, and the first direction is vertical in the second direction.

A battery deformation detection device according to yet another embodiment of the present disclosure includes:

Wherein, as shown in FIG. 5 and FIG. 7 , the first conductive layer 121 includes a plurality of first conductive strips 1211 arranged along the first direction, two adjacent first conductive strips 1211 are insulated, and the second conductive layer 122 It includes a plurality of second conductive strips 1221 arranged along the second direction, two adjacent second conductive strips are insulated, and the first direction is perpendicular to the second direction.

The size of the first conductive strips 1211 along the first direction can be appropriately set to accommodate the deformation of the outer surface of the battery 11 or the deformation of the inner surface of the case 15 .

The size of the second conductive strips 1221 in the second direction can be appropriately set to accommodate the deformation of the outer surface of the battery 11 or the deformation of the inner surface of the case 15 .

For example, in order to facilitate the description of Fig. 4 and Fig. 5, the first direction may be the X direction (horizontal direction of the paper), and the second direction may be the Y direction (the vertical direction of the paper).

Insulation between the first conductive strips 1211 can be achieved by arranging an insulating substance, for example, an insulating layer, between adjacent first conductive strips 1211 .

Insulation between the second conductive strips 1221 can be achieved by arranging insulating substances between adjacent second conductive strips 1221, for example, providing an insulating layer.

Preferably, a second driving voltage is applied to both ends of all the second conductive strips 1221 of the second conductive layer 122, and voltage sensing is performed on all the first conductive strips 1211 of the first conductive layer 121, based on whether the sensing voltage is generated Determine whether the first conductive layer 121 and the second conductive layer 122 are in contact, and determine the first conductive layer 121 and the second conductive layer 122 based on the position of the at least one first conductive strip 1211 that generates the sensing voltage in the first conductive layer 121 contact position.

Wherein, when the second driving voltage is applied to both ends of all the second conductive strips 1221 of the second conductive layer 122, the second driving voltage may be applied simultaneously or sequentially.

Preferably, the first driving voltage is applied to both ends of all the first conductive strips 1221 of the first conductive layer 121, and the voltage sensing is performed on all the second conductive strips 1221 of the second conductive layer 122, based on whether the sensing voltage is generated Determine whether the first conductive layer 121 and the second conductive layer 122 are in contact, and determine the first conductive layer 121 and the second conductive layer 122 based on the position of the at least one second conductive strip 1221 that generates the sensing voltage in the second conductive layer 122 contact position.

Wherein, when the first driving voltage is simultaneously applied to both ends of all the first conductive strips 1221 of the first conductive layer 121, the first driving voltage may be applied simultaneously or sequentially.

Preferably, the driving voltage is alternately applied to both ends of all the first conductive strips 1211 of the first conductive layer 121 and both ends of all the second conductive strips 1221 of the second conductive layer 122 .

When a driving voltage is applied to both ends of all the first conductive strips 1211 of the first conductive layer 121, voltage sensing is performed on all the second conductive strips 1221 of the second conductive layer 122, When a driving voltage is applied to both ends of the two conductive strips 1221 , voltage sensing is performed on all the first conductive strips 1211 of the first conductive layer 121 .

Obtaining the first conductivity based at least on the position of the at least one second conductive strip 1221 that generates the sensing voltage in the second conductive layer 122 and the position of the at least one first conductive strip 1211 that generates the sensing voltage in the first conductive layer 121 At least one contact position of the layer 121 and the second conductive layer 122 .

For example, the preset distance 123 between the first conductive layer 121 and the second conductive layer 122 can be set to be the maximum deformation degree of the battery 11 that can be tolerated (the battery can still be used safely).

In each of the above embodiments, preferably, the battery deformation detection device further includes a signal detection unit 13, and the signal detection unit 13 measures the mutual capacitance formed between each of the first conductive strips 1211 and each of the second conductive strips 1221, based on at least one The change of the mutual capacitance determines the position where the preset distance 123 of the first conductive layer 121 and the second conductive layer 122 changes, so as to determine at least one deformation position of the battery.

Wherein, as shown in FIG. 8 and FIG. 9 , the first conductive layer 121 includes a first rectangular conductive element array, the first conductive elements of the first rectangular conductive element array are insulated from each other, and the second conductive layer 122 includes a second rectangular conductive element array. In the element array, each second conductive element of the second rectangular conductive element array is insulated, and each first conductive element of the first rectangular conductive element array is arranged opposite to each second conductive element of the second rectangular conductive element array.

The number and shape of the first conductive elements shown in FIG. 8 and FIG. 9 are exemplary.

For the battery deformation detection device of the above-mentioned embodiment, preferably, a second driving voltage is applied to all the second conductive elements of the second conductive layer 122, and voltage sensing is performed to all the first conductive elements of the first conductive layer 121, based on Whether the sensing voltage is generated to determine whether the first conductive layer 121 and the second conductive layer 122 are in contact, and based on the position of the at least one first conductive element generating the sensing voltage in the first conductive layer 121 to determine whether the first conductive layer 121 and the second conductive layer 121 The contact position of the two conductive layers 122 .

For the battery deformation detection device of the above-mentioned embodiment, preferably, the first driving voltage is applied to all the first conductive elements of the first conductive layer 121, and the voltage sensing is performed to all the second conductive elements of the second conductive layer 122, based on Whether the first conductive layer 121 and the second conductive layer 122 are in contact is determined whether the sensing voltage is generated, and the first conductive layer 121 and the second conductive layer 122 are determined based on the position of the at least one second conductive element generating the sensing voltage in the second conductive layer 122 The contact position of the two conductive layers 122 .

For the battery deformation detection device of the above-mentioned embodiment, preferably, the driving voltage is alternately applied to all the first conductive elements of the first conductive layer 121 and all the second conductive elements of the second conductive layer 122 .

When the driving voltage is applied to all the first conductive elements of the first conductive layer 121, voltage sensing is performed to all the second conductive elements of the second conductive layer 122, and when the driving voltage is applied to all the second conductive elements of the second conductive layer 122 When the voltage is applied, voltage sensing is performed on all the first conductive elements of the first conductive layer 121 .

The first conductive layer 121 is obtained based at least on the position of the at least one second conductive element generating the sensing voltage in the second conductive layer 122 and the position of the at least one first conductive element generating the sensing voltage in the first conductive layer 121 At least one contact position with the second conductive layer 122 .

For example, the preset distance 123 between the first conductive layer 121 and the second conductive layer 122 can be set to the maximum deformation degree of the battery 11 that can be tolerated.

In the above-mentioned embodiment, the battery deformation detection device further includes a signal detection part 13 , and the signal detection part 13 is used to detect the mutual relationship between the first conductive element and the second conductive element which are arranged opposite to the first rectangular conductive element array and the second rectangular conductive element array. The capacitance is measured, and the position where the preset distance 123 of the first conductive layer 121 and the second conductive layer 122 changes is determined based on the change of at least one mutual capacitance, thereby determining at least one deformation position of the battery.

For the battery deformation detection device of each of the above-mentioned embodiments, preferably, as shown in FIG.

The first substrate 125 and the second substrate 126 are both insulating substrates.

For example, the battery deformation detection device is provided on the surface of the battery 11 through the first substrate 125 and the second substrate 126 .

The first substrate 125 and the second substrate 126 are both flexible substrates. For example PET film.

As shown in FIG. 4 and FIG. 5 , the predetermined spacing 123 described above is formed by the support part 124 , and the support part 124 may be disposed between the first conductive layer 121 and the second conductive layer 122 .

Preferably, the support portion 124 is disposed between the first substrate 125 and the second substrate 126 .

Wherein, the support portion 124 is an insulating material.

Wherein, the support portion 124 may be disposed at the edges of the first conductive layer 121 and the second conductive layer 122 , as shown in FIG. 4 .

Wherein, the support portion 124 may be disposed at the edges of the first substrate 125 and the second substrate 126, as shown in FIG. 5 .

In the above-mentioned embodiment, the support portion 124 may include a plurality of discrete support portions, or the support portion 124 has an integral structure, such as a square ring shape.

Those skilled in the art should understand that the strain sensing part 12 can be disposed between two adjacent batteries 11 , and the strain sensing part can be disposed between the battery 11 and the case 15 .

Those skilled in the art should understand that the strain sensing part 12 can also generate a strain electrical signal based on the deformation of the casing 15 of the battery device 10 .

For the battery deformation detection device of each of the above embodiments, preferably, as shown in FIG. 10 , the signal detection part 13 includes: a drive circuit, which is used to provide a drive signal to the strain sensing part 12; and a detection circuit, which is used to respond to the strain The electrical signal is detected; and the controller, which controls the driving circuit to provide the driving signal to the strain sensing part 12, and processes the electrical strain signal obtained by the detection circuit to generate the processed electrical strain signal.

Preferably, the signal detection unit 13 further includes a memory, and the memory stores the electrical strain signal processed by the controller.

The circuit structure of the signal detection part of the present disclosure will be further described below with reference to FIGS. 10 to 16 .

According to an embodiment of the present disclosure, as shown in FIG. 11 , the drive circuit of the signal detection unit 13 includes: a digital-to-analog converter 302, which converts a digital drive signal received from the controller into an analog drive signal; an amplifier; 303, the amplifier 303 amplifies the analog drive signal to generate the amplified drive signal (Vs); and the multiplexer 304, the multiplexer 304 includes a plurality of signal channels, and the drive signal amplified by the amplifier 303 passes through a plurality of One or more of the signal channels are applied to the strain sensing portion 12 .

In the above embodiment, preferably, the driving signal amplified by the amplifier 303 is applied to one or more first conductive strips 1211 of the first conductive layer 121 of the strain sensing portion 12 via one or more of the plurality of signal channels. The first conductive strip 1211; or, the driving signal amplified by the amplifier 303 is applied to one or more of the second conductive strips 1221 of the second conductive layer 122 of the strain sensing portion 12 via one or more of the plurality of signal channels The second conductive strip 1221 .

According to yet another embodiment of the present disclosure, as shown in FIG. 12 , the drive circuit of the signal detection unit 13 includes: a digital-to-analog converter 302, and the digital-to-analog converter 302 converts the digital drive signal received from the controller into an analog drive signal; A multiplexer 304, the multiplexer 304 including a plurality of signal channels via one or more of which the analog drive signal is output; and a plurality of amplifiers 303, each pair of amplifiers 303 via the multiplexer The analog drive signal output by one signal channel of 304 is amplified, and the amplified analog drive signal is applied to the strain sensing portion 12 .

In the above-mentioned embodiment, preferably, one signal channel among the plurality of signal channels or the analog driving signal output by the plurality of signal channels is amplified and then applied to a first conductive strip 1211 of the first conductive layer 121 of the strain sensing portion 12 . or a plurality of first conductive strips 1211; or, one signal channel of the plurality of signal channels or the analog driving signal output by the plurality of signal channels is amplified and applied to a second one of the second conductive layer 122 of the strain sensing portion 12 The conductive strip 1221 or a plurality of second conductive strips 1221 .

According to yet another embodiment of the present disclosure, as shown in FIG. 13 , the detection circuit of the signal detection part 13 includes: a sense amplifier 306 , and the sense amplifier 306 responds to the first conductive layer 121 or the second conductive layer 122 of the strain sensing part 12 . and the analog-to-digital converter 308, the analog-to-digital converter 308 performs analog-to-digital conversion on the amplified induced voltage, generates a digital induced voltage and converts it into an amplified induced voltage; Outputted to the controller, the digitally induced voltage indicates the change in the mutual capacitance between the first conductive layer 121 and the second conductive layer 122 .

In the above embodiment, preferably, as shown in FIG. 14 , the detection circuit further includes a filter 307 , and the filter 307 is arranged between the sense amplifier 306 and the analog-to-digital converter 308 .

According to yet another embodiment of the present disclosure, as shown in FIG. 15 , the detection circuit of the signal detection part 13 includes: a differential amplifier 309 . Amplifying the sensed voltages (Vb+, Vb-) to generate amplified sensing voltages; and an analog-to-digital converter 311 , which converts the amplified sensing voltages into digital signals and outputs them to the controller.

In the above embodiment, preferably, as shown in FIG. 16 , the detection circuit further includes a differential anti-aliasing filter 310 , and the differential anti-aliasing filter 310 is arranged between the differential amplifier 309 and the analog-to-digital converter 311 .

FIG. 16 also exemplarily shows the structure of the differential amplifier 309 .

Those skilled in the art should understand that the battery deformation detection device of the present disclosure may include a plurality of signal detection parts 13 shown in FIG. 10 to drive and detect the strain sensing parts 12 respectively. The battery deformation detection device of the present disclosure may also include only one signal detection part 13, and each strain sensing part 12 may be driven and detected through multiple electrical channels.

The signal detection part 13 may be in the form of a chip or a PCB circuit board, and the present disclosure does not specifically limit the specific form of the signal detection part 13 .

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 can at least generate a strain electrical signal based on the deformation of the battery 11 of the battery device 10 . The signal at least indicates the occurrence of deformation.

Wherein, the strain sensing portion 12 includes at least one strain sensing device 120, the strain sensing device 120 includes a first conductive layer 121 and a second conductive layer 122, and there is a predetermined distance 123 between the first conductive layer 121 and the second conductive layer 122, The first conductive layer 121 or the second conductive layer 122 can deform the position of the first conductive layer 121 corresponding to the deformation of the battery 11 or the position of the second conductive layer 122 corresponding to the deformation of the battery 11 in response to the deformation of the battery 11 . When the position is deformed, the strain sensing portion 12 generates a strain electrical signal based on the deformation of the first conductive layer 121 or the deformation of the second conductive layer 122 .

The present disclosure also provides a battery management system, including the battery deformation detection device of any one of the above embodiments. FIG. 17 shows the battery management system, in which the signal detection part described above can be integrated into a chip, and the pin strain sensing part of the chip is connected.

In the description of this specification, references to the terms "one embodiment/mode", "some embodiments/modes", "example", "specific example", or "some examples", etc. are intended to be combined with the description of the embodiment/mode A particular feature, structure, material, or characteristic described by way of example or example is included in at least one embodiment/mode or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment/mode or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments/means or examples. Furthermore, those skilled in the art may combine and combine the different embodiments/modes or examples described in this specification and the features of the different embodiments/modes or examples without conflicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

Those skilled in the art should understand that the above-mentioned embodiments are only for clearly illustrating the present disclosure, rather than limiting the scope of the present disclosure. For those skilled in the art, other changes or modifications may also be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

A battery deformation detection device, characterized in that it includes:

at least one strain sensing portion provided on at least one surface of the battery of the battery device, the strain sensing portion capable of generating a strain electrical signal at least based on the deformation of the battery of the battery device, the strain electrical signal at least indicate the occurrence of said deformation;

Wherein, the strain sensing portion includes at least one strain sensing device, the strain sensing device includes a first conductive layer and a second conductive layer, and there is a preset distance between the first conductive layer and the second conductive layer, The first conductive layer or the second conductive layer can respond to the deformation of the battery so that there is a gap between the position of the first conductive layer corresponding to the deformation and the position of the second conductive layer corresponding to the deformation The preset interval of , changes, and the strain electrical signal is generated based on the change of the preset interval.
The battery deformation detection device according to claim 1, wherein a first driving voltage is applied to both ends of the first conductive layer, and current sensing is performed on both ends of the first conductive layer, judging a change in the preset distance between the first conductive layer and the second conductive layer based on a change in the sensed current;

Alternatively, a second driving voltage is applied to both ends of the second conductive layer, current sensing is performed on the two ends of the second conductive layer, and the first conductive layer is determined based on the change of the sensed current the change of the preset spacing with the second conductive layer;

Alternatively, a first driving voltage is applied to both ends of the first conductive layer, current sensing is performed on both ends of the first conductive layer, and a second driving voltage is applied to both ends of the second conductive layer voltage, and current sensing is performed on the two ends of the second conductive layer, based on the change of the current at the two ends of the first conductive layer and the change of the current at the two ends of the second conductive layer judging the change of the preset distance between the first conductive layer and the second conductive layer;

The strained electrical signal includes a change in the current.
The battery deformation detection device according to claim 2, further comprising a signal detection unit, wherein the signal detection unit detects the electrical strain signal generated by the strain sensing unit.
The battery deformation detection device according to claim 1, wherein a first driving current is applied to both ends of the first conductive layer, and voltage sensing is performed on the two ends of the first conductive layer, judging a change in the preset distance between the first conductive layer and the second conductive layer based on a change in the sensed voltage;

Alternatively, a second driving current is applied to both ends of the second conductive layer, voltage sensing is performed on the two ends of the second conductive layer, and the first conductive layer is determined based on a change in the sensed voltage the change of the preset spacing with the second conductive layer;

Alternatively, a first driving current is applied to both ends of the first conductive layer, voltage sensing is performed on both ends of the first conductive layer, and a second driving current is applied to both ends of the second conductive layer current, and voltage sensing is performed on the two ends of the second conductive layer, based on the change of the voltage at the two ends of the first conductive layer and the change of the voltage at the two ends of the second conductive layer judging the change of the preset distance between the first conductive layer and the second conductive layer;

The strained electrical signal includes a change in the voltage.
The battery deformation detection device according to claim 4, further comprising a signal detection unit that detects the electrical strain signal generated by the strain sensing unit.
The battery deformation detection device according to claim 1, further comprising a signal detection unit, the signal detection unit measures the mutual capacitance formed by the first conductive layer and the second conductive layer, based on the The change of the mutual capacitance determines the change of the preset distance; the strain electrical signal includes the change of the mutual capacitance.
The battery deformation detection device according to claim 6, further comprising a signal detection unit that detects the electrical strain signal generated by the strain sensing unit.
The battery deformation detection device according to claim 1, wherein a first driving voltage is applied to both ends of the first conductive layer, and voltage sensing is performed on the second conductive layer, based on whether a sensing The voltage determines whether the first conductive layer is in contact with the second conductive layer.
The battery deformation detection device according to claim 1, wherein a second driving voltage is applied to both ends of the second conductive layer, and voltage sensing is performed on the first conductive layer, based on whether a sensing The voltage determines whether the first conductive layer is in contact with the second conductive layer.
The battery deformation detection device according to claim 1, wherein a driving voltage is alternately applied to both ends of the first conductive layer and both ends of the second conductive layer. When a driving voltage is applied to both ends of the second conductive layer, voltage sensing is performed on the second conductive layer, and when a driving voltage is applied to both ends of the second conductive layer, voltage sensing is performed on the first conductive layer;

At least based on the magnitude of the sensing voltage generated when the voltage sensing is performed on the first conductive layer and the magnitude of the sensing voltage generated when the voltage sensing is performed on the second conductive layer, it is determined that the first conductive layer and the The contact position of the second conductive layer.
The battery deformation detection device according to claim 10, wherein the two ends of the first conductive layer to which the driving voltage is applied are two ends in the first direction, and the two ends of the second conductive layer to which the driving voltage is applied are: Both ends in the second direction, the first direction is perpendicular to the second direction.
The battery deformation detection device according to claim 1, wherein the first conductive layer comprises a plurality of first conductive strips arranged along the first direction, and two adjacent first conductive strips are insulated, so The second conductive layer includes a plurality of second conductive strips arranged along a second direction, two adjacent second conductive strips are insulated, and the first direction is perpendicular to the second direction.
The battery deformation detection device according to claim 12, wherein a second driving voltage is applied to both ends of all the second conductive strips of the second conductive layer, and a second driving voltage is applied to all the first conductive strips of the first conductive layer. Conducting voltage sensing on the conductive strips, determining whether the first conductive layer and the second conductive layer are in contact based on whether a sensing voltage is generated, and determining whether the first conductive layer is in contact with the second conductive layer based on whether the sensing voltage is generated by the at least one first conductive strip in the first conductive layer. The position determines the contact position of the first conductive layer and the second conductive layer.
The battery deformation detection device according to claim 12, wherein a first driving voltage is applied to both ends of all the first conductive strips of the first conductive layer, and a first driving voltage is applied to all the second conductive strips of the second conductive layer. Conducting voltage sensing on the conductive strips, determining whether the first conductive layer and the second conductive layer are in contact based on whether a sensing voltage is generated, and determining whether the first conductive layer is in contact with the second conductive layer based on whether the at least one second conductive strip generating the sensing voltage is in the second conductive layer. The position determines the contact position of the first conductive layer and the second conductive layer.
The battery deformation detection device according to claim 12, wherein the two ends of all the first conductive strips of the first conductive layer and the two ends of all the second conductive strips of the second conductive layer are alternately apply driving voltage;

When a driving voltage is applied to both ends of all the first conductive strips of the first conductive layer, voltage sensing is performed on all the second conductive strips of the second conductive layer. When a driving voltage is applied to both ends of the second conductive strip, voltage sensing is performed on all the first conductive strips of the first conductive layer;

Obtaining the first conductive layer and the second conductive layer based on at least the position of the at least one second conductive strip that generates the sensing voltage in the second conductive layer and the position of the at least one first conductive strip that generates the sensing voltage in the first conductive layer At least one contact location of the conductive layer.
The battery deformation detection device according to claim 12, further comprising a signal detection part, the signal detection part measures the mutual capacitance formed between each of the first conductive strips and each of the second conductive strips, based on at least A change in mutual capacitance determines the position where the preset distance between the first conductive layer and the second conductive layer changes, so as to determine at least one deformation position of the battery.
The battery deformation detection device according to claim 1, wherein the first conductive layer comprises a first rectangular conductive element array, and the first conductive elements of the first rectangular conductive element array are insulated from each other, and the second conductive element is insulated from one another. The conductive layer includes a second rectangular conductive element array, each second conductive element of the second rectangular conductive element array is insulated, each first conductive element of the first rectangular conductive element array and each second conductive element of the second rectangular conductive element array are conductive Components are set relative to each other.
The battery deformation detection device according to claim 17, wherein the second driving voltage is applied to all the second conductive elements of the second conductive layer, and the second driving voltage is applied to all the first conductive elements of the first conductive layer. Voltage sensing, judging whether the first conductive layer and the second conductive layer are in contact based on whether a sensing voltage is generated, and judging the first conductive layer based on the position of the at least one first conductive element generating the sensing voltage in the first conductive layer. The contact position between a conductive layer and the second conductive layer.
The battery deformation detection device according to claim 17, wherein a first driving voltage is applied to all the first conductive elements of the first conductive layer, and a first driving voltage is applied to all the second conductive elements of the second conductive layer. Voltage sensing, judging whether the first conductive layer and the second conductive layer are in contact based on whether a sensing voltage is generated, and judging the first conductive layer based on the position of at least one second conductive element generating the sensing voltage in the second conductive layer. The contact position between a conductive layer and the second conductive layer.
The battery deformation detection device according to claim 17, wherein a driving voltage is alternately applied to all the first conductive elements of the first conductive layer and to all the second conductive elements of the second conductive layer;

When a driving voltage is applied to all the first conductive elements of the first conductive layer, voltage sensing is performed on all the second conductive elements of the second conductive layer, and when a driving voltage is applied to all the second conductive elements of the second conductive layer When a driving voltage is applied to the elements, voltage sensing is performed on all the first conductive elements of the first conductive layer;

Obtaining the first conductive layer and the second conductive layer based on at least the position of the at least one second conductive element that generates the sensing voltage in the second conductive layer and the position of the at least one first conductive element that generates the sensing voltage in the first conductive layer At least one contact location of the conductive layer.
The battery deformation detection device according to claim 17, further comprising a signal detection part, the signal detection part detects the first rectangular conductive element array and the second rectangular conductive element array arranged opposite to the second rectangular conductive element array. The mutual capacitance formed by a conductive element and the second conductive element is measured, and based on the change of at least one mutual capacitance, the position where the preset distance between the first conductive layer and the second conductive layer is changed is determined to determine at least one deformation position of the battery .
The battery deformation detection device according to claim 1, wherein the first conductive layer is provided on the first substrate, and the second conductive layer is provided on the second substrate.
The battery deformation detection device according to claim 22, wherein the first substrate and the second substrate are both insulating substrates.
The battery deformation detection device according to claim 23, wherein the first substrate and the second substrate are both flexible substrates.
The battery deformation detection device according to claim 1, wherein the preset distance is formed by a support portion, and the support portion is provided between the first conductive layer and the second conductive layer.
The battery deformation detection device according to claim 22, wherein the preset distance is formed by a support portion, and the support portion is provided between the first substrate and the second substrate.
The battery deformation detection device according to claim 25, wherein the support portion is disposed at the edge of the first conductive layer and the second conductive layer.
The battery deformation detection device according to claim 26, wherein the support portion is provided at the edge of the first substrate and the second substrate.
The battery deformation detection device according to any one of claims 25 to 28, wherein the support portion comprises a plurality of discrete support portions, or the support portion is an integral structure.
The battery deformation detection device according to claim 1, wherein the strain sensing part can be disposed between two adjacent batteries.
The battery deformation detection device according to claim 1, wherein the strain sensing portion can be disposed between the battery and the case.
The battery deformation detection device according to claim 1, wherein the strain sensing part is further capable of generating the electrical strain signal based on the deformation of the casing of the battery device.
The battery deformation detection device according to claim 3, 5, 6, 7, 16 or 21, wherein the signal detection part comprises:

a driving circuit, which is used for providing a driving signal to the strain sensing part;

a detection circuit for detecting the strain electrical signal; and

The controller controls the driving circuit to provide a driving signal to the strain sensing part, and processes the electrical strain signal obtained by the detection circuit to generate a processed electrical strain signal.
The battery deformation detection device according to claim 33, wherein the signal detection part further comprises a memory, and the memory stores the electric strain signal processed by the controller.
The battery deformation detection device according to claim 33, wherein the drive circuit comprises:

a digital-to-analog converter that converts a digital drive signal received from the controller into an analog drive signal;

an amplifier that amplifies the analog drive signal to generate an amplified drive signal; and

A multiplexer including a plurality of signal channels, and a driving signal amplified by the amplifier is applied to the strain sensing portion via one or more of the plurality of signal channels.
The battery deformation detection device according to claim 35, wherein the driving signal amplified by the amplifier is applied to the first conductive part of the strain sensing part via one or more of the plurality of signal channels a first conductive strip or a plurality of first conductive strips of the layer;

Alternatively, the driving signal amplified by the amplifier is applied to a second conductive strip or a plurality of second conductive strips of the second conductive layer of the strain sensing portion via one or more of the plurality of signal channels .
The battery deformation detection device according to claim 33, wherein the drive circuit comprises:

a digital-to-analog converter that converts a digital drive signal received from the controller into an analog drive signal;

a multiplexer including a plurality of signal channels, the analog drive signal being output via one or more of the plurality of signal channels; and

A plurality of amplifiers, each of which amplifies an analog drive signal output via one signal channel of the multiplexer, and the amplified analog drive signal is applied to the strain sensing portion.
The battery deformation detection device according to claim 37, wherein the analog driving signal output by one or more of the plurality of signal channels is amplified and then applied to the first signal channel of the strain sensing part. A first conductive strip or a plurality of first conductive strips of a conductive layer;

Or, the analog driving signal output by one or more signal channels of the plurality of signal channels is amplified and then applied to one second conductive strip or a plurality of second conductive layers of the second conductive layer of the strain sensing portion Conductive strip.
The battery deformation detection device according to claim 33, wherein the detection circuit comprises:

a sense amplifier, the sense amplifier senses the induced charge of the first conductive layer or the second conductive layer of the strain sensing part, and converts it into an amplified induced voltage; and

an analog-to-digital converter, the analog-to-digital converter performs analog-to-digital conversion on the amplified induced voltage, generates a digital induced voltage and outputs it to the controller, and the digital induced voltage indicates the first conductive voltage Variation in mutual capacitance between the layer and the second conductive layer.
The battery deformation detection device according to claim 39, further comprising a filter, wherein the filter is arranged between the sense amplifier and the analog-to-digital converter.
The battery deformation detection device according to claim 33, wherein the detection circuit comprises:

a differential amplifier, the differential amplifier amplifies the sensing voltage of the first conductive layer or the second conductive layer of the strain sensing portion to generate an amplified sensing voltage; and

an analog-to-digital converter, which converts the amplified sensing voltage into a digital signal and outputs it to the controller.
The battery deformation detection device according to claim 41, wherein the detection circuit further comprises a differential anti-aliasing filter, and the differential anti-aliasing filter is arranged between the differential amplifier and the analog-to-digital converter .
A battery deformation detection device, characterized in that it includes:

at least one strain sensing portion provided on at least one surface of a battery of the battery device, the strain sensing portion capable of generating a strain electrical signal at least based on deformation of the battery of the battery device, the strain electrical signal at least indicate the occurrence of said deformation;

Wherein, the strain sensing portion includes at least one strain sensing device, the strain sensing device includes a first conductive layer and a second conductive layer, and there is a preset distance between the first conductive layer and the second conductive layer, The first conductive layer or the second conductive layer can deform the position of the first conductive layer corresponding to the deformation of the battery or the position of the second conductive layer corresponding to the deformation of the battery in response to the deformation of the battery The position of the strain sensor is deformed, and the strain sensing portion generates the strain electrical signal based on the deformation of the first conductive layer or the deformation of the second conductive layer.
A battery management system, comprising: the battery deformation detection device according to any one of claims 1 to 43.