Battery pack, battery pack detection method, detection system and vehicle

Abstract

The present application provides a battery pack, a battery pack detection method, a detection system and a vehicle, including battery cells and a damage detection unit. The damage detection unit is disposed on at least a part of the surface of the battery cells. The damage detection unit is configured to generate a signal capable of characterizing the damage position of the battery cells when the battery pack is subjected to an external force impact, so as to effectively detect the damage position of the battery pack, comprehensively understand the health state of the battery pack, and improve safety.

Description

Technical Field

[0001] This application relates to the field of new energy vehicles, and particularly to a battery pack, a battery pack detection method, a detection system, and a vehicle. Background Art

[0002] The battery pack is the main power source of current new energy vehicles. Its performance not only affects the driving state of the vehicle but also directly determines the driving safety of the entire vehicle.

[0003] Therefore, the detection of the battery pack is particularly important. However, the current detection methods are difficult to detect the damage location of the battery pack and cannot comprehensively understand the health status of the battery pack. Summary of the Invention

[0004] This application provides a battery pack, a battery pack detection method, a detection system, and a vehicle, which can detect the damage location of the battery pack.

[0005] In a first aspect, this application provides a battery pack, including battery cells and a damage detection unit. The damage detection unit is disposed on at least a part of the surface of the battery cells. The damage detection unit is configured to generate a signal that can characterize the damage location of the battery cells when the battery cells are subjected to an external impact.

[0006] In some embodiments, the damage detection unit includes a charge plate and an induction plate, and the induction plate is disposed between the charge plate and the battery cells.

[0007] In some embodiments, the charge plate is a metal plate, and the thickness of the charge plate is between 0.1 mm and 3 mm.

[0008] In some embodiments, the induction plate includes an insulating plate and a plurality of induction ends located in the insulating plate. The heads of the induction ends are correspondingly disposed with respect to the charge plate.

[0009] In some embodiments, the thickness of the insulating plate is between 0.1 mm and 3 mm.

[0010] In some embodiments, it further includes:

[0011] A shielding plate, which is disposed between the battery cells and the damage detection unit.

[0012] In some embodiments, the shielding plate is a metal plate, and the thickness of the shielding plate is between 0.1 mm and 3 mm.

[0013] In some embodiments, the damage detection unit is configured to generate a signal that can characterize the damage location of the battery cells by the induction plate obtaining the charge change of the charge plate when the battery cells are subjected to an external impact.

[0014] In some embodiments, the damage detection unit is configured to generate a signal characterizing the degree of damage of the battery cell when the battery cell is subjected to an external force impact.

[0015] In some embodiments, the damage detection unit has a first state. In the first state, the damage detection unit is configured to, when the battery cell is subjected to an external force impact, the induction plate obtains the charge change of the charge plate at the impacted position and generates a first signal characterizing the degree of damage of the battery cell;

[0016] When in the first state, the charge plate is in its original form, and the first signal is a signal indicating that the battery cell is not damaged.

[0017] In some embodiments, the damage detection unit has a second state. In the second state, the damage detection unit is configured to, when the battery cell is subjected to an external force impact, the induction plate obtains the charge change of the charge plate at the impacted position and generates a second signal characterizing the degree of damage of the battery cell;

[0018] When in the second state, the charge plate is in a deformed form, and the second signal is a signal indicating deformation damage or breakdown damage of the battery cell.

[0019] In some embodiments, the damage detection unit has a third state. In the third state, the damage detection unit is configured to, when the battery cell is subjected to an external force impact, the induction plate obtains the charge change of the charge plate at the impacted position and generates a third signal characterizing the degree of damage of the battery cell;

[0020] When in the third state, the charge plate is in a breakdown form, and the third signal is a signal indicating breakdown damage of the battery cell.

[0021] In some embodiments, the battery cell includes a battery pack bottom plate;

[0022] The deformation position and degree of the charge plate correspond to the damage position and degree of the battery pack bottom plate.

[0023] In a second aspect, the present application provides a battery pack detection method, and the method is used to detect the above-mentioned battery pack.

[0024] In some embodiments, the damage detection unit includes a charge plate and an induction plate, and the induction plate is disposed between the charge plate and the battery cell;

[0025] The method includes:

[0026] When the battery cell is subjected to an external force impact, obtain the electric charge amounts of each area on the charge plate through the induction plate;

[0027] Obtain the damage position of the battery cell according to the electric charge amounts of each area on the charge plate, and generate a signal characterizing the damage position of the battery cell.

[0028] In some embodiments, the obtaining the damage position of the battery cell according to the electric charge amounts of each area on the charge plate includes:

[0029] When there is a first area on the charge plate where the electric charge amount is within a preset electric charge amount range, determine the first area as the deformation position of the charge plate; when there is a second area on the charge plate where the electric charge amount is zero, and there is a third area around the second area where the electric charge amount is within the preset electric charge amount range, determine the second area as the deformation position of the charge plate;

[0030] Determine the damage position of the battery cell according to the deformation position of the charge plate.

[0031] In some embodiments, the obtaining the damage position of the battery cell according to the electric charge amounts of each area on the charge plate includes:

[0032] Construct a two-dimensional matrix according to the electric charge amounts of each area on the charge plate;

[0033] Perform a normalization process on the two-dimensional matrix to obtain an equivalent charge matrix;

[0034] When there is a first value within a preset numerical range in the equivalent charge matrix, determine the area corresponding to the first value as the deformation position of the charge plate; when there is a zero value in the equivalent charge matrix, and there is a second value within the preset numerical range around the zero value, determine the area corresponding to the zero value as the deformation position of the charge plate;

[0035] Determine the damage position of the battery cell according to the deformation position of the charge plate.

[0036] In some embodiments, the generating a signal characterizing the damage position of the battery cell includes:

[0037] Output a signal that can characterize the damage position of the battery cell in at least one of a numerical form and an image form.

[0038] In some embodiments, the method includes:

[0039] When the battery cell is subjected to an external force impact, generate a signal characterizing the damage degree of the battery cell.

[0040] In some embodiments, the damage detection unit includes a charge plate and a sensing plate, and the sensing plate is disposed between the charge plate and the battery cell;

[0041] When the battery cell is subjected to an external force impact, generating a signal characterizing the damage degree of the battery cell includes:

[0042] When the battery cell is subjected to an external force impact, obtaining the electric charge quantity of each area on the charge plate through the sensing plate;

[0043] Determining the damage degree of the battery cell according to the electric charge quantity of each area on the charge plate, and generating a signal characterizing the damage degree of the battery cell.

[0044] In some embodiments, the determining the damage degree of the battery cell according to the electric charge quantity of each area on the charge plate, and generating a signal characterizing the damage degree of the battery cell includes:

[0045] When there is a first area on the charge plate where the electric charge quantity is within a preset electric charge quantity range, determining that the charge plate is in a deformed state, and generating a signal characterizing the deformation damage of the battery cell;

[0046] When there is a second area on the charge plate where the electric charge quantity is zero, and there is a third area around the second area where the electric charge quantity is within the preset electric charge quantity range, determining that the charge plate is in a breakdown state, and generating a signal characterizing the breakdown damage of the battery cell;

[0047] When there is no area on the charge plate where the electric charge quantity is within the preset electric charge quantity range, determining that the charge plate is in an original state, and generating a signal characterizing that the battery cell is not damaged.

[0048] In some embodiments, the obtaining the damage degree of the battery cell according to the electric charge quantity of each area on the charge plate includes:

[0049] Constructing a two-dimensional matrix according to the electric charge quantity of each area on the charge plate;

[0050] Performing a normalization process on the two-dimensional matrix to obtain an equivalent charge matrix;

[0051] When there is a first value within a preset numerical range in the equivalent charge matrix, determining that the charge plate is in a deformed state, and generating a signal characterizing the deformation damage or breakdown damage of the battery cell;

[0052] When there is a zero value in the equivalent charge matrix, and there is a second value within the preset numerical range around the zero value, determining that the charge plate is in a breakdown state, and generating a signal characterizing the breakdown damage of the battery cell;

[0053] When there is no value within the preset numerical range in the equivalent charge matrix, it is determined that the charge plate is in the original state, and a signal indicating that the battery cell is not damaged is generated.

[0054] In some embodiments, generating a signal indicating the degree of damage to the battery cell includes:

[0055] Outputting a signal that can indicate the degree of damage to the battery cell in at least one of numerical form and image form.

[0056] In a third aspect, the present application provides a battery pack detection system, including: the battery pack and a memory as described in the above claims. The damage detection unit includes a processor. The memory stores computer instructions, and the processor executes the computer instructions executed by the memory to implement the method described above.

[0057] In some embodiments, the damage detection unit includes a charge plate and a sensing plate. The sensing plate is disposed between the charge plate and the battery cell;

[0058] It further includes:

[0059] A sensor, the sensor is connected to the sensing plate and the processor; the sensor obtains the electric charge amount of each area on the charge plate through the sensing plate and sends it to the processor;

[0060] The processor is configured to obtain the damage position or degree of damage of the battery cell according to the electric charge amount of each area on the charge plate, and generate a signal indicating the damage position or degree of damage of the battery cell.

[0061] In some embodiments, the sensor includes a static sensor.

[0062] In a fourth aspect, the present application provides a vehicle, including the battery pack detection system described above.

[0063] In a fifth aspect, the present application provides a computer-readable storage medium. Computer instructions are stored in the computer-readable storage medium. When at least one processor of an electronic device executes the computer instructions, the electronic device executes the method in the second aspect and any possible design of the second aspect.

[0064] In a sixth aspect, the present application provides a computer program product. The computer program product includes computer instructions. When at least one processor of an electronic device executes the computer instructions, the electronic device executes the method in the second aspect and any possible design of the second aspect.

[0065] The battery pack, battery pack detection method, detection system, and vehicle provided by the present application include battery cells and a damage detection unit. The damage detection unit is disposed on at least a part of the surface of the battery cells. The damage detection unit is configured to generate a signal capable of characterizing the damage position of the battery cells when the battery pack is subjected to an external force impact, so as to effectively detect the damage position of the battery pack, comprehensively understand the health status of the battery pack, and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0067] Figure 1 Schematic structural diagram of a battery pack provided by an embodiment of the present application;

[0068] Figure 2 Schematic diagram of the charge distribution on a charge plate provided by an embodiment of the present application;

[0069] Figure 3 Schematic structural diagram of a battery pack monitoring system provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0070] To make the objectives, technical solutions, and advantages of the present application clearer, the following will clearly and completely describe the technical solutions in the present application with reference to the drawings in the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0071] Considering factors such as the overall vehicle center of gravity layout and aerodynamic performance, most battery packs are arranged on the vehicle chassis. During vehicle driving, it is easy to scrape and collide with road obstacles due to road conditions. Once the bottom plate of the battery pack is severely deformed or damaged, the battery cells in the battery pack are also easily damaged by intrusion, directly affecting the safety performance of the battery pack.

[0072] Currently, mainly by setting up structural buffers around the battery pack to reduce the collision damage of the battery pack, so as to improve the safety performance of the battery pack.

[0073] Effective damage detection can help users to grasp the collision state of the battery pack under the vehicle in real time, and provide important reference information for vehicle damage identification and safety warning.

[0074] In some embodiments, a monitoring unit including a sealed cavity is constructed at the bottom of the battery pack. When the bottom of the battery pack is bumped and damaged, the monitoring unit can output the air pressure change in the sealed cavity to remind the user that the battery pack is damaged.

[0075] Although this method can detect battery pack damage, since bumps at different positions of the battery pack can cause air pressure changes in the sealed cavity, it is difficult to locate the damage. Moreover, this method only monitors the overall air pressure of the sealed cavity and it is difficult to analyze the damage degree of each bump point, resulting in the user being unable to timely and comprehensively understand the state characteristics of the battery pack.

[0076] Therefore, the present application proposes a battery pack including a damage detection unit. The damage detection unit is disposed on at least a part of the surface of the battery unit. When the battery pack is subjected to an external impact, the damage detection unit can generate a signal that can characterize the damage position of the battery unit, thereby effectively detecting the damage position of the battery pack and improving safety.

[0077] Figure 1 The structural schematic diagram of a battery pack provided by an embodiment of the present application is shown. As Figure 1 shown, the battery pack provided in this embodiment may include:

[0078] A battery unit 10 and a damage detection unit 20, and the damage detection unit 20 is disposed on at least a part of the surface of the battery unit 10; the damage detection unit 20 is configured such that when the battery unit 10 is subjected to an external impact, the damage detection unit 20 generates a signal that can characterize the damage position of the battery unit.

[0079] In the embodiment of the present application, the damage detection unit 20 is disposed on at least a part of the surface of the battery unit 10, and can generate a signal that can characterize the damage position of the battery unit 10 when the battery unit 10 is subjected to an external impact, thereby effectively detecting the damage position of the battery unit 10 and improving safety.

[0080] Exemplarily, as Figure 1 shown, the battery unit 10 may include a battery pack main body 101 and a battery pack bottom plate 102. The damage detection unit 20 is disposed on at least a part of the surface of the battery unit 10, which may include at least a part of the surface of the side of the battery pack bottom plate 102 opposite to the battery pack main body 101, or may include at least a part of the surface of the side of the battery pack main body 101 opposite to the battery pack bottom plate 102. The battery pack main body 101 may include battery cells, heat dissipation components, etc. The battery unit 10 may further include a housing, and the housing and the battery pack bottom plate 102 may form the entire housing of the battery pack, and the housing may accommodate battery cells, heat dissipation components, the damage detection unit 20, etc.

[0081] In some embodiments, the damage detection unit includes a charge plate and a sensing plate, and the sensing plate is disposed between the charge plate and the battery cell. It can be understood that when the battery cell is subjected to an external force impact (for example, a bump or a collision), it is prone to deformation. When the battery cell deforms, it may cause the charge plate to deform, or cause the charge plate and the sensing plate to deform. When the charge plate deforms, the sensing plate can obtain the charge change of the charge plate, so as to determine the deformation position of the charge plate according to the charge change of the charge plate, and thus determine the damage position of the battery cell, generating a signal that can characterize the damage position of the battery cell.

[0082] In some examples, as Figure 1 shown, the charge plate 104 is close to the bottom plate 102 of the battery pack, and the sensing plate 103 is disposed between the battery pack body 101 and the charge plate 104. When the bottom plate 102 of the battery pack is bumped, it is prone to deformation. Correspondingly, it may cause the charge plate 104 to deform. When the charge plate 104 deforms, the charge distribution on the charge plate 104 changes. The sensing plate 103 can obtain the charge change of the charge plate 104, and determine the deformation position of the charge plate 104 according to the charge change of the charge plate 104, so as to determine the damage position of the bottom plate 102 of the battery pack, generating a signal that can characterize the damage position of the bottom plate 102 of the battery pack.

[0083] In practical applications, the distance between the charge plate 104 and the bottom plate 102 of the battery pack can be determined according to the actual situation. Considering that the bottom plate 102 of the battery pack is a non-conductive plate, the charge plate 104 can be attached to the surface of the bottom plate 102 of the battery pack on the side opposite to the battery pack body 101, or the charge plate 104 can be close to but not in contact with the bottom plate 102 of the battery pack. And the distance between the sensing plate 103 and the charge plate 104 can be determined according to the actual situation. For example, it can be as close as possible to the charge plate 104, but not in contact with the charge plate 104, and at the same time the sensing plate 103 is not in contact with the battery pack body 101 to avoid short circuit.

[0084] As a way of implementation, the deformation position of the charge plate corresponds to the damage position of the bottom plate of the battery pack, so that the damage position of the bottom plate of the battery pack can be determined according to the deformation position of the charge plate.

[0085] In some other examples, the charge plate is close to the battery pack body, and the sensing plate is disposed between the bottom plate of the battery pack and the charge plate. When the battery pack body is collided and deformed, it may cause the charge plate to deform. The sensing plate can obtain the charge change of the charge plate, and determine the deformation position of the charge plate according to the charge change of the charge plate, so as to determine the damage position of the battery pack body, generating a signal that can characterize the damage position of the battery pack body.

[0086] In practical applications, the distance between the charge plate and the battery pack body can be determined according to the actual situation. For example, the charge plate can be as close as possible to the battery pack body, but cannot be attached to the battery pack body. And the distance between the induction plate and the charge plate can be determined according to the actual situation. For example, it can be as close as possible to the charge plate, but cannot be attached to the charge plate to avoid short circuit.

[0087] It should be noted that under the action of a constant electric field, the charges on the surface of the charge plate will be distributed according to the geometry of the charges. When the surface of the charge plate is uniform and flat, the charges on the surface of the charge plate are evenly distributed, and the amount of charge at each point on the surface is equal except for the edge region of the charge plate. When there are geometric irregularities on the charge surface, the charges will accumulate along the feature surface, and the more prominent the feature, the greater the amount of charge accumulation.

[0088] Therefore, the damage position of the battery cell can be judged according to the amount of charge in each area of the charge plate. For example, if the amount of charge in a certain area of the charge plate is different from that in other areas, it can be judged that this area is the deformation position of the charge plate. Then, the damage position of the battery cell can be determined according to the deformation position of the charge plate. For example, the deformation position of the charge plate corresponds to the damage position of the battery cell, so the damage position of the battery cell can be determined according to the deformation position of the charge plate.

[0089] For example, if the charge plate is close to the bottom plate of the battery pack and the induction plate is arranged between the battery pack body and the charge plate, after determining the deformation position of the charge plate, the damage position of the bottom plate of the battery pack can be determined according to the deformation position of the charge plate. If the charge plate is close to the battery pack body and the induction plate is arranged between the bottom plate of the battery pack and the charge plate, after determining the deformation position of the charge plate, the damage position of the battery pack body can be determined according to the deformation position of the charge plate. It should be noted that in the direction parallel to the bottom plate of the battery pack, the battery pack body is presented in the form of a plate, and this plate includes multiple components, such as battery cells, heat dissipation components, etc.

[0090] As a way of implementation, the charge plate is divided into multiple areas, and the areas of the multiple areas are within a preset area range. For example, the areas of the multiple areas are the same. The induction plate can sense the amount of charge in each area of the charge plate and determine the deformation position of the charge plate based on the amount of charge in each area.

[0091] For example, when there is a first area on the charge plate where the amount of charge is within a preset charge amount range, the first area is determined as the damage position of the charge plate, and the position of the battery cell corresponding to the first area is the damage position of the battery cell; when there is a second area on the charge plate where the amount of charge is zero, and there is a third area with the amount of charge within the preset charge amount range around the second area, the third area is determined as the damage position of the charge plate, and the position of the battery cell corresponding to the third area is the damage position of the battery cell.

[0092] It should be noted that the electric charge quantity on the charge plate is certain. When the surface of the charge plate is uniform and flat, the electric charge quantities in each area are the same or approximately the same. When the surface of the charge plate is uneven, the electric charge quantities in each area are different. If the electric charge quantity in some areas is large, the electric charge quantity in other areas will be small. Therefore, the damage position of the charge plate can be determined according to the electric charge quantity in each area.

[0093] In some embodiments, as Figure 1 shown, the induction plate 103 includes an insulating plate 1031 and a plurality of induction ends 1032 located on the insulating plate 1031. The heads of the induction ends 1032 are arranged corresponding to the charge plate 104. The charge plate 104 includes a plurality of areas, each induction end 1032 corresponds to one area, and each induction end 1032 can sense the electric charge quantity in the corresponding area, so as to obtain the charge distribution of the charge plate 104. Exemplarily, the induction end 1032 is a metal induction end.

[0094] As a implementation method, a plurality of holes arranged at equal intervals are provided on the insulating member 1031, and the induction ends 1032 are embedded in the holes. The heads of the induction ends 1032 are arranged corresponding to the charge plate 104, so as to use the plurality of induction ends 1032 to sense the electric charge quantity in each area of the charge plate 104, thereby obtaining the charge distribution of the charge plate 104.

[0095] In some examples, the insulating member is a thin plate member. For example, the thickness of the insulating member is within a preset thickness range, and the preset thickness range can be 0.1 mm to 3 mm. By setting the insulating member as a thin plate member, the space occupied by the battery pack can be reduced, and it can better meet the requirements of the space layout of the battery packs of most passenger cars.

[0096] In some examples, the charge plate is a metal plate with uniform thickness, and the metal plate is a thin plate. By setting the charge plate as a thin metal plate member, the deformation sensitivity to the battery cell is high, the detection accuracy is improved, and the space occupied by the battery pack can be reduced, and it can better meet the requirements of the space layout of the battery packs of most passenger cars. Specifically, the thickness of the metal plate is within a preset thickness range, and the preset thickness range can be 0.1 mm to 3 mm.

[0097] In some embodiments, the battery pack further includes a shielding plate. The shielding plate is arranged between the battery cell and the damage detection unit, and the shielding plate is used to shield the interference of the battery cell to the damage detection unit. Specifically, as Figure 1As shown, the shielding plate 105 is arranged between the battery pack main body 101 and the induction plate 103. The charges on the side of the shielding plate 105 close to the battery pack main body 101 reach electric field equilibrium under the combined action of the power supply electric field and the induction electric field of the battery pack main body, thereby shielding the interference of the induction electric field generated by the induction current of the battery pack main body 101 to the induction plate 103 and improving the induction accuracy of the induction plate 103 for the charge distribution on the charge plate 104.

[0098] In some examples, the shielding plate is a metal plate with a uniform thickness, and the metal plate is a thin plate. By setting the shielding plate as a thin metal plate component, the space occupied by the battery pack can be reduced, and it can better adapt to the space layout requirements of most passenger car battery packs. Specifically, the thickness of the metal plate is within a preset thickness range, and the preset thickness range can be 0.1 mm to 3 mm.

[0099] In practical applications, the charge on the charge plate will change only when the power supply is connected, and the induction plate can obtain the charge change of the charge plate only when the power supply is connected.

[0100] As a realization method, the battery pack main body is connected to the charge plate and the shielding plate. Specifically, the battery pack main body can be connected to both ends of the charge plate and both ends of the shielding plate to provide a low-voltage power supply lower than the first voltage threshold for the charge plate and the shielding plate, so that the monitoring function can be automatically turned on after the vehicle is powered on at low voltage, which is convenient for users to obtain the collision state information of the battery unit in time. Among them, after the vehicle is powered on at low voltage, the battery pack main body starts to supply power to provide a low-voltage for the charge plate and the shielding plate. The vehicle being powered on at low voltage here can be understood as the vehicle starting. For example, the low-voltage power supply can be a 12V or 24V low-voltage power.

[0101] In some embodiments, the damage detection unit is configured to, when the battery unit is subjected to an external force impact, the induction plate obtains the charge change of the charge plate and generates a signal that can characterize the damage degree of the battery unit, so that the damage degree of the battery unit can be effectively detected, the health state of the battery pack can be further comprehensively understood, and the safety can be improved.

[0102] It should be noted that when the battery unit is subjected to an external force impact, it is prone to deformation, and the amount of deformation is positively correlated with the external force and the damage degree. The greater the external force, the greater the amount of deformation, the greater the damage degree, the smaller the external force, the smaller the amount of deformation, and the smaller the damage degree.

[0103] In some embodiments, the damage detection unit includes a charge plate and a sensing plate. The sensing plate is disposed between the charge plate and the battery cell. When the battery cell is deformed, it is likely to cause the charge plate to deform, or cause the charge plate and the sensing plate to deform. Moreover, the amount of deformation of the charge plate is positively correlated with the degree of damage of the battery cell. The greater the degree of damage of the battery cell, the greater the amount of deformation of the charge plate; the smaller the degree of damage of the battery cell, the smaller the amount of deformation of the charge plate. In addition, different amounts of deformation of the charge plate result in different charge changes of the charge plate. Therefore, the charge distribution of the charge plate can be obtained through the sensing plate, the amount of deformation of the charge plate can be determined based on the charge distribution, and the degree of damage of the battery cell can be determined based on the amount of deformation of the charge plate, thereby generating a signal characterizing the degree of damage of the battery cell.

[0104] In some examples, the charge plate is close to the bottom plate of the battery pack, and the sensing plate is disposed between the main body of the battery pack and the charge plate. When the bottom plate of the battery pack is knocked, it is likely to be deformed. Correspondingly, it may cause the charge plate to deform. When the charge plate is deformed, the charge distribution on the charge plate changes. The sensing plate can obtain the charge change of the charge plate, determine the amount of deformation of the charge plate based on the charge change of the charge plate, and thus can determine the degree of damage of the bottom plate of the battery pack, generating a signal that can characterize the degree of damage of the bottom plate of the battery pack.

[0105] As an implementation manner, the amount of deformation of the charge plate corresponds to the degree of damage of the bottom plate of the battery pack, so that the degree of damage of the bottom plate of the battery pack can be determined based on the amount of deformation of the charge plate.

[0106] In some other examples, the charge plate is close to the main body of the battery pack, and the sensing plate is disposed between the bottom plate of the battery pack and the charge plate. When the main body of the battery pack is deformed due to a collision, it may cause the charge plate to deform. The sensing plate can obtain the charge change of the charge plate, determine the amount of deformation of the charge plate based on the charge change of the charge plate, and thus can determine the degree of damage of the main body of the battery pack, generating a signal that can characterize the degree of damage of the main body of the battery pack.

[0107] In some examples, the sensing plate includes an insulating plate and a plurality of sensing ends located in the insulating plate. The heads of the sensing ends are disposed corresponding to the charge plate. Each sensing end can obtain the amount of charge of the corresponding area on the charge plate, so that the amounts of charge of multiple areas on the charge plate can be obtained through the plurality of sensing ends to obtain the charge distribution on the charge plate. Further, the amount of deformation of the charge plate can be determined based on the amounts of charge of multiple areas on the charge plate to determine the degree of damage of the charge unit.

[0108] For example, when there is a first region on the charge plate where the amount of charge is within a preset charge amount range, it is determined that the charge plate is in a deformed state, and a signal indicating deformation damage or breakdown damage of the battery cell is generated; for another example, when there is a second region on the charge plate where the amount of charge is zero, and there is a third region around the second region where the amount of charge is within the preset charge amount range, it is determined that the charge plate is in a breakdown state, and a signal indicating breakdown damage of the battery cell is generated; when there is no region on the charge plate where the amount of charge is within the preset charge amount range, it is determined that the charge plate is in an original state, and a signal indicating that the battery cell is not damaged is generated.

[0109] In some embodiments, the damage detection unit has a first state. In the first state, the damage detection unit is configured such that when the battery cell is subjected to an external force impact, the induction plate acquires the charge change of the charge plate at the impacted position and generates a first signal that can characterize the damage degree of the battery cell; when the damage detection unit is in the first state, the charge plate or the induction plate is in an original state, and the first signal is a signal indicating that the battery cell is not damaged.

[0110] In other embodiments, the damage detection unit has a second state. In the second state, the damage detection unit is configured such that when the battery cell is subjected to an external force impact, the induction plate acquires the charge change of the charge plate at the impacted position and generates a second signal that can characterize the damage degree of the battery cell; when the damage detection unit is in the second state, the charge plate is in a deformed state, and the second signal is a signal indicating deformation damage or breakdown damage of the battery cell. It can be understood that when the battery cell is deformed or broken down, it is easy to cause the charge plate to deform. Therefore, when the charge plate is in a deformed state, a signal indicating deformation damage or breakdown damage of the battery cell can be generated.

[0111] As a implementation manner, the second state includes a first sub-state and a second sub-state. When the damage detection unit is in the first sub-state, the damage detection unit is configured such that when the battery cell is subjected to an external force impact, the induction plate acquires the charge change of the charge plate at the impacted position and generates a first sub-signal that can characterize the damage degree of the battery cell; when the damage detection unit is in the second sub-state, the damage detection unit is configured such that when the battery cell is subjected to an external force impact, the induction plate acquires the charge change of the charge plate at the impacted position and generates a second sub-signal that can characterize the damage degree of the battery cell. Among them, the damage degree of the battery cell when the damage detection unit is in the first sub-state is less than the damage degree of the battery cell when the damage detection unit is in the second sub-state.

[0112] In still other embodiments, the damage detection unit has a third state. In the third state, the damage detection unit is configured such that when the battery cell is subjected to an external force impact, the induction plate acquires the charge change of the charge plate at the impacted position to generate a third signal characterizing the damage degree of the battery cell; when the damage detection unit is in the third state, the charge plate is in a breakdown state, and the third signal is a signal of the breakdown damage of the battery cell. It can be understood that when the battery cell is broken down, it may cause the charge plate to be broken down. If the charge plate is in a breakdown state, the battery cell has been broken down. Therefore, when the charge plate is in a breakdown state, a signal of the breakdown damage of the battery cell can be generated.

[0113] In practical applications, when the damage detection unit is in the first sub-state, the damage degree of the battery cell is a slight deformation; when the damage detection unit is in the second sub-state, the damage degree of the battery cell is a severe deformation; when the damage detection unit is in the third state, the damage degree of the battery cell is being broken down. Moreover, a slight deformation does not affect the performance of the battery pack; a severe deformation indicates that there is an intrusion damage to the battery core, affecting the performance of the battery pack; being broken down indicates that there is a risk of exposure of the battery core, and the battery pack may not be usable.

[0114] The above-mentioned slight deformation, severe deformation, and being broken down can be determined based on the deformation amount in combination with existing deformation parameters. For example, the deformation degree is determined to be slight deformation, severe deformation, or being broken down according to the depression amount of the battery pack bottom plate and the existing depression parameters. The depression amount can be the depth of the depression relative to the surface of the battery pack bottom plate.

[0115] The battery pack provided by the present application includes a battery cell and a damage detection unit. The damage detection unit is disposed on at least a part of the surface of the battery cell and is capable of generating a signal characterizing the damage position of the battery cell when the battery cell is subjected to an external force impact, so as to effectively detect the damage position of the battery pack, understand the health state of the battery pack, and improve safety.

[0116] An embodiment of the present application further provides a method for detecting a battery pack, and this method is used to detect the above-mentioned battery pack.

[0117] In some embodiments, when the battery cell is subjected to an external force impact, the damage detection unit generates a signal characterizing the damage position of the battery cell, thereby effectively detecting the damage position of the battery cell. Among them, the battery pack includes a battery cell and a damage detection unit.

[0118] In some examples, the damage detection unit includes a charge plate and a sensing plate, and the sensing plate is disposed between the charge plate and the battery cell. When the battery cell is subjected to an external force impact, the amount of charge in each area on the charge plate is obtained through the sensing plate, and the deformation position of the charge plate is determined according to the amount of charge in each area on the charge plate. Then, the damage position of the battery cell can be determined according to the deformation position of the charge plate, and a signal representing the damage position of the battery cell is generated, thereby effectively detecting the damage position of the battery cell and improving safety.

[0119] As an implementation, the damage detection unit includes a charge plate, a sensing plate, and a processor connected to the sensing plate. When the battery cell is subjected to an external force impact, the processor obtains the amount of charge in each area on the charge plate through the sensing plate, and obtains the damage position of the battery cell according to the amount of charge in each area on the charge plate, and generates a signal representing the damage position of the battery cell.

[0120] For example, the sensing plate includes a plurality of sensing ends, each sensing end corresponds to an area on the charge plate, and each sensing end can sense the amount of charge in the corresponding area on the charge plate. Accordingly, the processor can obtain the amount of charge sensed by each sensing end, that is, the amount of charge in each area on the charge plate. Then, the processor can obtain the damage position of the battery cell according to the amount of charge in each area on the charge plate.

[0121] In some embodiments, when there is a first area on the charge plate where the amount of charge is within a preset charge amount range, the first area is determined as the deformation position of the charge plate; when there is a second area on the charge plate where the amount of charge is zero, and there is a third area around the second area where the amount of charge is within the preset charge amount range, the second area is determined as the deformation position of the charge plate. When there is no area on the charge plate where the amount of charge is within the preset charge amount range, it is determined that the charge plate is in the original state and the battery cell is not damaged. Since the deformation position of the charge plate corresponds to the damage position of the battery cell, the damage position of the battery cell can be determined according to the deformation position of the charge plate, so that the damage position of the battery cell can be simply and effectively judged.

[0122] In some other embodiments, a two-dimensional matrix is constructed according to the amount of charge in each area on the charge plate. For example, the charge distribution data can be sorted into a two-dimensional matrix according to the distribution number and distribution position of the sensing ends. For example, if the number of sensing ends is i×j and they are arranged in the pattern of i rows and j columns, the two-dimensional matrix is a two-dimensional matrix of i rows and j columns, and each element in the two-dimensional matrix corresponds to the sensed charge amount of a sensing end. In practical applications, for the possible problem of missing charge signals at a few positions, zero-padding processing can be performed at the corresponding positions in the two-dimensional matrix.

[0123] Subsequently, the data in the two-dimensional matrix can be normalized so that the data has a unified mathematical expression form, simplifying the calculation process and improving the calculation efficiency. The data in the two-dimensional matrix is normalized to obtain an equivalent charge matrix. Specifically, since the damage form of the battery pack hitting the bottom mainly shows local damage at finite positions on the bottom plate of the battery pack, and the total amount of charge carried by the charge plate under the action of a constant voltage electric field is basically constant, the minimum element in the two-dimensional matrix can be set as a preset charge amount e0. The geometric feature of the corresponding position of the preset charge amount e0 on the charge plate is the smoothest, that is, there is no collision damage at this position. Subsequently, taking the preset charge amount e0 as the base, the data in the two-dimensional matrix can be normalized as follows to obtain an equivalent charge matrix: E0 = E / e0, where E is the two-dimensional matrix.

[0124] Subsequently, the deformation condition of the bottom plate of the battery pack can be judged according to the equivalent charge matrix, and the deformation condition of the bottom plate of the battery pack can be determined more intuitively. Specifically, when there is a first value within a preset numerical range in the equivalent charge matrix, the area corresponding to the first value is determined as the deformation position of the charge plate; when there is a zero value in the equivalent charge matrix and there is a second value within a preset numerical range around the zero value, the area corresponding to the zero value is determined as the deformation position of the charge plate. Subsequently, the damage position of the battery cell can be determined according to the deformation position of the charge plate.

[0125] In some embodiments, a signal characterizing the damage position of the battery cell is output in at least one of a numerical form and an image form to visually present the damage position of the battery cell.

[0126] In some embodiments, when the battery cell is subjected to an external impact, a signal characterizing the damage degree of the battery cell can also be generated, so that the damage degree of the battery cell can be effectively detected, the health state of the battery pack can be further comprehensively understood, and the safety can be improved.

[0127] In some embodiments, the damage detection unit includes a charge plate and a sensing plate, and the sensing plate is arranged between the charge plate and the battery cell. When the battery cell is subjected to an external impact, the charge amount of each area on the charge plate is obtained through the sensing plate, and the deformation degree of the charge plate is obtained according to the charge amount of each area on the charge plate. Subsequently, the damage degree of the battery cell can be determined according to the deformation degree of the charge plate, and a signal characterizing the damage degree of the battery cell is generated, so as to effectively detect the damage degree of the battery cell, further comprehensively understand the health state of the battery pack, and improve the safety.

[0128] As an implementation, the damage detection unit includes a charge plate, a sensing plate, and a processor connected to the sensing plate. When the battery cell is subjected to an external force impact, the processor obtains the electric charge quantity of each area on the charge plate through the sensing plate, and obtains the damage degree of the battery cell according to the electric charge quantity of each area on the charge plate, and generates a signal representing the damage degree of the battery cell.

[0129] In some embodiments, when there is a first area on the charge plate where the electric charge quantity is within a preset electric charge quantity range, it is determined that the charge plate is in a deformed state, and a signal representing the deformation damage of the battery cell is generated; when there is a second area on the charge plate where the electric charge quantity is zero, and there is a third area around the second area where the electric charge quantity is within a preset electric charge quantity range, it is determined that the charge plate is in a breakdown state, and a signal representing the breakdown damage of the battery cell is generated; when there is no area on the charge plate where the electric charge quantity is within a preset electric charge quantity range, it is determined that the charge plate is in an original state, and a signal representing that the battery cell is not damaged is generated, so that the damage degree of the battery cell can be simply and effectively judged.

[0130] In other embodiments, a two-dimensional matrix is constructed according to the electric charge quantity of each area on the charge plate, and the two-dimensional matrix is normalized to obtain an equivalent charge matrix; when there is a first numerical value within a preset numerical value range in the equivalent charge matrix, it is determined that the charge plate is in a deformed state, and a signal representing the deformation damage or breakdown damage of the battery cell is generated; when there is a zero numerical value in the equivalent charge matrix, and there is a second numerical value within a preset numerical value range around the zero numerical value, it is determined that the charge plate is in a breakdown state, and a signal representing the breakdown damage of the battery cell is generated; when there is no numerical value within a preset numerical value range in the equivalent charge matrix, it is determined that the charge plate is in an original state, and a signal representing that the battery cell is not damaged is generated.

[0131] In practical applications, for the problem of bumping, there can be four cases:

[0132] First, there is no bump at each position of the bottom plate of the battery pack. Correspondingly, the charge plate is not deformed. In this case, the charge distribution on the charge plate is relatively uniform. As shown in (1) of Figure 2 , the numerical values corresponding to the monitoring positions everywhere in the equivalent charge matrix are the same and are all close to 1;

[0133] Second, there is a bump on the bottom plate of the battery pack, which causes slight deformation of the bottom plate of the battery pack. Correspondingly, the charge plate is slightly deformed. In this case, there are areas where the charge distribution is relatively concentrated on the charge plate. As shown in (2) of Figure 2 , there are multiple data anomalies that are too large in the data of the equivalent charge matrix at the corresponding monitoring positions;

[0134] Thirdly, when the bottom plate of the battery pack is knocked, it may cause the bottom plate of the battery pack, the charge plate, the induction component, etc. to intrude upward into the main body of the battery pack, resulting in damage to the battery cells. In this case, there is a region on the charge plate where the charge distribution is more concentrated, as shown in Figure 2 shown in (3) of

[0135] Fourthly, when the bottom plate of the battery pack is knocked and causes the bottom plate to be punctured, at this time, due to the puncture damage of the bottom plate of the battery pack, the corresponding position of the charge plate and the induction end are damaged, and there is a region with zero charge on the charge plate, as shown in Figure 2 shown in (4) of Figure 2 shown in (4) of

[0136] Therefore, the damage condition of the bottom plate of the battery pack can be more intuitively judged according to the equivalent charge matrix.

[0137] As an implementation method, the preset numerical range may include a first numerical range and a second numerical range, and the minimum value of the second numerical range is greater than the maximum value of the first numerical range. When there are data within the first numerical range in the equivalent charge matrix, it is determined that the bottom plate of the battery pack is slightly deformed; when there are data within the second numerical range in the equivalent charge matrix, it is determined that the bottom plate of the battery pack is severely deformed; when there is a zero value in the equivalent matrix and other values around this value are within the preset numerical range, it is determined that the bottom plate of the battery pack is punctured, and the severity of the penetration damage can also be determined according to other values around this value; when each value in the equivalent charge matrix is lower than the minimum value of the preset numerical range, it is determined that the bottom plate of the battery pack has no deformation.

[0138] Among them, the preset numerical range can be determined according to the preset charge amount range. For example, the ratio of the maximum value of the preset charge amount range to the preset charge amount is used as the maximum value of the preset numerical range, and the ratio of the minimum value of the preset charge amount range to the preset charge amount is used as the minimum value of the preset numerical range.

[0139] As an implementation, the damage location and / or damage degree of the battery cell can be determined based on the data characteristics of the equivalent charge matrix. Then, the damage location and / or damage degree of the battery cell can be output in numerical form. Also, based on the data characteristics of the equivalent charge matrix, a deformed contour map with different colors can be marked and the damage location and / or damage degree of the battery cell can be output in image form. The damage degree and / or damage location of the battery cell can also be output in both numerical form and image form, so as to intuitively reflect the damage condition of the battery cell, enabling the user to more comprehensively understand the health status of the battery cell and timely discover potential safety risks.

[0140] In practical applications, the damage location and / or damage degree of the battery cell can be reflected on the user interface in numerical form and / or image form, facilitating the user to intuitively obtain the health status of the battery pack.

[0141] In some embodiments, after determining the deformation condition (damage location and / or damage degree) of the battery cell, an alarm message can be output to timely notify the user of the status of the battery pack and improve safety performance. For example, when it is determined that the battery cell is slightly deformed, a first alarm message can be output; when it is determined that the battery cell is severely deformed, a second alarm message can be output; when it is determined that the battery cell is punctured, a third alarm message can be output. The first alarm message instructs the user that the battery pack has a slight bump deformation and needs to be noted during subsequent driving; the second alarm message instructs the user that there is an intrusion damage at the corresponding position of the battery cell in the battery pack, and the safety performance of the battery pack is affected and needs to be checked and repaired in time; the third alarm message instructs the user that the battery pack is punctured and needs to be checked and repaired immediately.

[0142] The battery pack monitoring method provided by this application can effectively monitor the damage location of the battery pack, understand the health status of the battery pack in real time, and improve safety.

[0143] An embodiment of this application provides a battery pack detection system, including the above-mentioned battery pack.

[0144] In some embodiments, as Figure 3 shown, the battery pack detection system includes: a battery pack 100 and a memory 300. The battery pack 100 includes battery cells 10 and a damage detection unit 20, and the damage detection unit 20 includes a processor 201.

[0145] The memory 300 is used to store computer instructions. This memory 300 may include high-speed random access memory (Random Access Memory, RAM), and may also include non-volatile memory (Non-Volatile Memory, NVM), such as at least one disk memory, and can also be a USB flash drive, a mobile hard disk, a read-only memory, a disk or an optical disc, etc.

[0146] The processor 201 is configured to execute computer instructions stored in the memory to implement the battery pack detection method in the above embodiments. For specific details, reference may be made to the relevant descriptions in the foregoing method embodiments. The processor 201 may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the invention may be directly implemented by the execution of the hardware processor, or may be implemented by a combination of hardware and software modules in the processor.

[0147] Optionally, the memory 300 may be either independent or integrated with the processor 201.

[0148] In some embodiments, the damage detection unit 20 includes a charge plate and a sensing plate, and the sensing plate is disposed between the charge plate and the battery cell. As Figure 3 shown, the damage detection unit 20 may further include a sensor 202. The sensor 202 is connected to the sensing plate and the processor 201. The sensor 202 obtains the electric charge amount of each area on the charge plate through the sensing plate, and sends it to the processor 201. The processor 201 obtains the damage position or damage degree of the battery cell according to the electric charge amount of each area on the charge plate, and generates a signal characterizing the damage position or damage degree of the battery cell. Through the sensor 202, the charge distribution sensed by the sensing plate can be accurately obtained, so that the processor 201 can more accurately determine the damage position or damage degree of the battery cell.

[0149] As an implementation manner, the sensing plate includes a plurality of sensing ends, and the sensor 202 is connected to the tails of each sensing end and the processor 201. The sensor 202 can obtain the sensed electric charge amount of each sensing end to obtain the electric charge amount of each area on the charge plate, and send the electric charge amount of each area on the charge plate to the processor 201.

[0150] As an implementation manner, the sensor is an electrostatic sensor. The electrostatic sensor has a low cost, and the signal acquisition is not easily interfered by the harsh working conditions of the chassis, and has good signal stability and high credibility.

[0151] This application also provides a vehicle, including the above battery pack detection system.

[0152] The present application also provides a computer-readable storage medium, in which computer instructions are stored. When the computer instructions are executed by a processor, they are used to implement the methods provided by the above various embodiments.

[0153] The present application also provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. At least one processor of the device can read the computer instructions from the computer-readable storage medium, and the execution of the computer instructions by at least one processor causes the device to implement the methods provided by the above various embodiments.

[0154] The embodiment of the present application also provides a chip, which includes a memory and a processor. The memory is used to store computer instructions, and the processor is used to call and run the computer instructions from the memory, so that the device equipped with the chip executes the methods described in the above various possible embodiments.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

1. A battery pack, characterized in that, It includes a battery cell, a damage detection unit, and a shielding plate. The damage detection unit is disposed on at least a part of the inner surface of the battery cell. The damage detection unit is configured to generate a signal that can characterize the damage position of the battery cell when the battery cell is impacted by an external force. The shielding plate is disposed between the battery cell and the damage detection unit; Wherein, the damage detection unit includes a charge plate and an induction plate arranged at intervals, and the induction plate is disposed between the charge plate and the shielding plate; The charge plate is a metal plate; The induction plate includes an insulating plate and a plurality of induction ends located in the insulating plate. The heads of the induction ends are arranged corresponding to the charge plate, and each induction end senses the charge quantity of the corresponding area; The damage detection unit is configured to generate a signal that can characterize the damage position of the battery cell according to the charge distribution of the charge plate obtained by the induction plate based on the charge quantity sensed by each induction end when the battery cell is impacted by an external force.

2. The battery pack according to claim 1, wherein The thickness of the charge plate is in the range of 0.1 mm to 3 mm.

3. The battery pack according to claim 1, characterized in that, The thickness of the insulating plate is in the range of 0.1 mm to 3 mm.

4. The battery pack according to claim 1, characterized in that, The shielding plate is a metal plate, and the thickness of the shielding plate is in the range of 0.1 mm to 3 mm.

5. The battery pack according to any one of claims 1-4, characterized in that The damage detection unit is configured to generate a signal that can characterize the damage degree of the battery cell when the battery cell is impacted by an external force.

6. The battery pack according to claim 5, wherein, The damage detection unit has a first state. In the first state, the damage detection unit is configured to generate a first signal that can characterize the damage degree of the battery cell according to the charge change of the charge plate at the impacted position by the induction plate when the battery cell is impacted by an external force; When in the first state, the charge plate is in its original form, and the first signal is a signal indicating that the battery cell is not damaged.

7. The battery pack according to claim 5, characterized in that, The damage detection unit has a second state. In the second state, the damage detection unit is configured to generate a second signal that can characterize the damage degree of the battery cell according to the charge change of the charge plate at the impacted position by the induction plate when the battery cell is impacted by an external force; When in the second state, the charge plate is in a deformed form, and the second signal is a signal indicating that the battery cell is deformed or punctured.

8. The battery pack according to claim 5, characterized in that, The damage detection unit has a third state. In the third state, the damage detection unit is configured to generate a third signal that can characterize the damage degree of the battery cell according to the charge change of the charge plate at the impacted position by the induction plate when the battery cell is impacted by an external force; When in the third state, the charge plate is in a punctured form, and the third signal is a signal indicating that the battery cell is punctured.

9. The battery pack according to claim 5, characterized in that, The battery cell includes a battery pack bottom plate; The deformation position and deformation degree of the charge plate correspond to the damage position and damage degree of the battery pack bottom plate.

10. A battery pack detection method, characterized in that, The method is used to detect the battery pack according to any one of claims 1-9.

11. The method according to claim 10, wherein The method includes: When the battery cell is impacted by an external force, obtaining the charge quantity of each area on the charge plate through the induction plate; Obtain the damage position of the battery cell based on the electric charge amounts of each region on the charge plate, and generate a signal characterizing the damage position of the battery cell.

12. The method according to claim 11, wherein The obtaining of the damage position of the battery cell based on the electric charge amounts of each region on the charge plate includes: When there is a first region on the charge plate where the electric charge amount is within a preset electric charge amount range, determine the first region as the deformation position of the charge plate; when there is a second region on the charge plate where the electric charge amount is zero, and there is a third region with an electric charge amount within the preset electric charge amount range around the second region, determine the second region as the deformation position of the charge plate; Determine the damage position of the battery cell according to the deformation position of the charge plate.

13. The method according to claim 11, wherein The obtaining of the damage position of the battery cell based on the electric charge amounts of each region on the charge plate includes: Construct a two-dimensional matrix according to the electric charge amounts of each region on the charge plate; Perform normalization processing on the two-dimensional matrix to obtain an equivalent charge matrix; When there is a first value within a preset value range in the equivalent charge matrix, determine the region corresponding to the first value as the deformation position of the charge plate; when there is a zero value in the equivalent charge matrix, and there is a second value within the preset value range around the zero value, determine the region corresponding to the zero value as the deformation position of the charge plate; Determine the damage position of the battery cell according to the deformation position of the charge plate.

14. The method according to any one of claims 11-13, characterized in that The generating of a signal characterizing the damage position of the battery cell includes: Output a signal that can characterize the damage position of the battery cell in at least one of a numerical form and an image form.

15. The method according to claim 10, wherein The method includes: When the battery cell is subjected to an external force impact, generate a signal characterizing the damage degree of the battery cell.

16. The method according to claim 15, wherein The damage detection unit includes a charge plate and an induction plate, and the induction plate is arranged between the charge plate and the battery cell; The generating of a signal characterizing the damage degree of the battery cell when the battery cell is subjected to an external force impact includes: When the battery cell is subjected to an external force impact, obtain the electric charge amounts of each region on the charge plate through the induction plate; Determine the damage degree of the battery cell according to the electric charge amounts of each region on the charge plate, and generate a signal characterizing the damage degree of the battery cell.

17. The method according to claim 16, wherein The determining of the damage degree of the battery cell according to the electric charge amounts of each region on the charge plate, and the generating of a signal characterizing the damage degree of the battery cell includes: When there is a first region on the charge plate where the electric charge amount is within a preset electric charge amount range, determine that the charge plate is in a deformed state, and generate a signal characterizing the deformation damage of the battery cell; When there is a second region on the charge plate where the electric charge amount is zero, and there is a third region with an electric charge amount within the preset electric charge amount range around the second region, determine that the charge plate is in a breakdown state, and generate a signal characterizing the breakdown damage of the battery cell; When there is no region on the charge plate where the electric charge amount is within the preset electric charge amount range, determine that the charge plate is in an original state, and generate a signal characterizing that the battery cell is not damaged.

18. The method according to claim 16, wherein The determining of the damage degree of the battery cell according to the electric charge amounts of each region on the charge plate includes: Construct a two-dimensional matrix based on the electric charge amounts of each region on the charge plate; Perform normalization processing on the two-dimensional matrix to obtain an equivalent charge matrix; When there is a first value within a preset numerical range in the equivalent charge matrix, determine that the charge plate is in a deformed state and generate a signal indicating deformation damage or breakdown damage of the battery cell; When there is a zero value in the equivalent charge matrix and there is a second value within the preset numerical range around the zero value, determine that the charge plate is in a breakdown state and generate a signal indicating breakdown damage of the battery cell; When there is no value within the preset numerical range in the equivalent charge matrix, determine that the charge plate is in an original state and generate a signal indicating that the battery cell is not damaged; 19. The method according to any one of claims 15 - 18, characterized in that, The generating a signal indicating the damage degree of the battery cell includes: Output a signal that can indicate the damage degree of the battery cell in at least one of a numerical form and an image form.

20. A battery pack detection system, characterized in that, including: The battery pack according to any one of claims 1-9.

21. The system according to claim 20, wherein The system further includes a memory, the damage detection unit includes a processor, the memory stores computer instructions, and the processor executes the computer instructions executed by the memory to implement the method according to any one of claims 10-19.

22. The system according to claim 21, wherein The damage detection unit includes a charge plate and a sensing plate, and the sensing plate is disposed between the charge plate and the battery cell; further includes: A sensor, the sensor is connected to the sensing plate and the processor; the sensor obtains the electric charge amounts of each region on the charge plate through the sensing plate and sends them to the processor; The processor is configured to obtain the damage position or damage degree of the battery cell according to the electric charge amounts of each region on the charge plate and generate a signal indicating the damage position or damage degree of the battery cell.

23. The system according to claim 22, wherein The sensor includes a static sensor.

24. A vehicle, characterized in that, The battery pack detection system according to any one of claims 20-23.

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