CN117429261B

CN117429261B - Method and device for detecting collision of battery, electronic equipment and storage medium

Info

Publication number: CN117429261B
Application number: CN202311570415.8A
Authority: CN
Inventors: 王衡; 龙文宝; 周伟庆; 牛妍妍; 项延火; 张冠军; 曹文晓; 解来勇
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-11-23
Filing date: 2023-11-23
Publication date: 2024-04-12
Anticipated expiration: 2043-11-23
Also published as: CN117429261A

Abstract

The application discloses a collision detection method and device of a battery, electronic equipment and a storage medium. The collision detection of the battery is used for collision detection of the battery with a plurality of sensors arranged on the surface, and the method comprises the following steps: acquiring collision signals sent by a sensor; determining collision information of the battery according to the collision signal; obtaining a collision detection result of the battery according to the collision information and parameter change information of the battery, which is obtained in response to the collision signal; the collision information includes a collision position and a collision force. The collision detection method of the battery can evaluate the collision condition of the battery, and improves the accuracy of early warning on the collision result of the battery.

Description

Method and device for detecting collision of battery, electronic equipment and storage medium

Technical Field

The present disclosure relates to the field of battery detection technologies, and in particular, to a method and an apparatus for detecting a collision of a battery, an electronic device, and a storage medium.

Background

Power cells are an important component of power equipment, such as electric vehicles. Currently, an electric battery is usually disposed at the bottom of the power plant to balance the power plant. However, the bottom of the power equipment is easily collided by an external object in the running process of the power equipment, so that the battery is damaged, and safety accidents such as battery leakage and explosion are induced.

For this reason, in the related art, a sensor is provided at the bottom of the battery to detect whether the battery is collided by the sensor, so that early warning is performed when the collision is detected. However, this method can only determine whether the battery is collided, and cannot determine the collision condition of the battery, so that the collision result of the battery cannot be accurately pre-warned.

Disclosure of Invention

In view of the above problems, the present application provides a method, an apparatus, an electronic device, and a storage medium for detecting a collision of a battery, which can evaluate the collision situation of the battery, so as to improve the accuracy of early warning the collision result of the battery.

In a first aspect, the present application provides a method for detecting a collision of a battery, the method being for detecting a collision of a battery having a plurality of sensors provided on a surface thereof, the method comprising: acquiring collision signals sent by the sensor; determining collision information of the battery according to the collision signal; obtaining a collision detection result of the battery according to the collision information and parameter change information of the battery, which is obtained in response to the collision signal; wherein the collision information includes a collision position and a collision force.

In the technical scheme of the embodiment of the application, the collision information including the collision position and the collision force of the battery is determined through the collision signal sent by the sensor, so that the collision detection result of the battery is obtained according to the collision information and the parameter change information of the battery acquired in response to the collision signal, the collision detection of the battery is enabled to take the influence of the collision position, the collision force and the collision on the parameter of the battery into consideration, and further the collision condition of the battery can be evaluated more comprehensively, and the accuracy of early warning on the collision result of the battery is improved.

In some embodiments, determining collision information for the battery from the collision signal comprises: and determining the collision position of the battery according to the area where the sensor for transmitting the collision signal is located. Therefore, the collision position can be quickly determined without test calibration, and the detection efficiency of the collision position is improved.

In some embodiments, determining collision information for the battery includes: and determining the impact force of the battery from each preset impact force calibrated based on each energy interval according to the signal energy of the impact signal, so that the accuracy of the obtained impact force is improved.

In some embodiments, according to the collision information and parameter variation information of the battery acquired in response to the collision signal, obtaining a collision detection result of the battery includes: according to the collision information, a risk assessment result of the battery is obtained; and determining that the risk assessment result reaches a preset risk level, and obtaining a collision detection result of the battery according to the risk assessment result and the parameter change information. According to the risk assessment result of the battery is obtained according to the collision information, so that the collision detection result of the battery is obtained according to the risk assessment result and the parameter change information under the condition that the risk assessment result reaches the preset risk level, and therefore the collision lower than the preset risk level can be filtered, the collision detection is carried out only for the collision reaching the preset risk level, resources consumed by the collision detection are reduced, and the collision detection efficiency is improved.

In some embodiments, obtaining the risk assessment result of the battery according to the collision information includes: determining a corresponding risk threshold according to the area where the collision position in the collision information is located; obtaining a risk assessment result of the battery according to a comparison result of the impact force in the collision information and the risk threshold value; wherein the risk threshold is determined from historical impact information for the region. The risk threshold value of the area is determined through the historical impact information of the impacted area, so that the risk assessment result of the battery is obtained according to the comparison result of the impact force in the impact information and the risk threshold value, the historical impact condition of the impacted area is considered in the risk assessment of the battery, and the accuracy of the risk assessment result is improved.

In some embodiments, obtaining the collision detection result of the battery according to the collision information and the parameter variation information includes: and obtaining the collision detection result comprising the deformation information of the battery according to the collision information and the parameter change information. The collision detection result comprising the deformation information of the battery is obtained through the collision information and the parameter change information, so that the obtained collision detection result is more comprehensive, and the accuracy of early warning on the collision result of the battery is further improved.

In some embodiments, obtaining the collision detection result including deformation information of the battery according to the collision information and the parameter variation information includes: obtaining damage information of a water cooling assembly of the battery according to the collision information and the temperature change in the parameter change information; determining deformation information of the battery according to the damage information of the water cooling assembly; wherein the damage information includes at least one of a crack diameter or a cooling water flow rate of the water cooling assembly. The crack diameter or the cooling water flow of the water cooling component of the battery is evaluated through the collision information and the temperature change in the parameter change information, so that the deformation information of the battery is determined based on an evaluation result, the specific deformation condition of the battery can be determined, and the accuracy of the detected deformation information is improved.

In some embodiments, further comprising: and adjusting the output power of the battery according to the collision detection result so as to improve the safety of the battery.

In some embodiments, adjusting the output power of the battery according to the collision detection result includes: and adjusting the output power of the battery according to the deformation information of the battery in the collision detection result so as to more accurately adjust the output power of the battery.

In some embodiments, further comprising: mapping the collision detection result with power equipment carrying the battery; and determining the battery collision risk of the power equipment of the same type according to each collision detection result of the power equipment map of the same type. Therefore, which type of vehicle is easy to collide can be effectively determined, and the safety and reliability of the vehicle can be effectively evaluated.

In a second aspect, the present application provides a collision detection device for a battery for collision detection of a battery provided with a sensor on a surface thereof, the device comprising: the collision signal acquisition module is used for acquiring collision signals sent by the sensor; the collision information determining module is used for determining the collision information of the battery according to the collision signal; the battery collision detection module is used for obtaining a collision detection result of the battery according to the collision information and parameter change information of the battery, which is obtained in response to the collision signal; wherein the collision information includes a collision position and a collision force.

In the technical scheme of the embodiment of the application, the collision information including the collision position and the collision force of the battery is determined through the collision signal sent by the sensor, so that the collision detection result of the battery is obtained according to the collision information and the parameter change information of the battery acquired in response to the collision signal, the collision detection of the battery is enabled to take the parameter influence of the collision position, the collision force and the collision on the battery into consideration, the collision condition of the battery can be evaluated more comprehensively, and the accuracy of early warning on the collision result of the battery is improved.

In a third aspect, the present application provides an electronic device comprising a memory storing a computer program and a processor executing the method in an implementation of the first aspect when the computer program is executed.

In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the method in an implementation of the first aspect.

In a fifth aspect, the present application provides a computer program product which, when run on a computer, causes the computer to perform the method of any of the optional implementations of the first aspect or the third aspect or any optional implementation of the third aspect.

In a sixth aspect, the application provides an electric device, including the electronic device and the battery in the third aspect, a plurality of sensors are disposed on a surface of the battery, and the electronic device is connected with the battery and each sensor.

In a seventh aspect, the present application provides a power device comprising an electronic device as in the third aspect or a powered device as in the sixth aspect.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

FIG. 2 is a schematic diagram of a battery structure according to some embodiments of the present application;

FIG. 3 is a flow chart of a method of collision detection of a battery according to some embodiments of the present application;

FIG. 4 is a bottom view of a battery according to some embodiments of the present application;

fig. 5 is a schematic structural view of a collision detection device of a battery according to some embodiments of the present application;

fig. 6 is a schematic structural diagram of an electronic device according to some embodiments of the present application.

Reference numerals in the specific embodiments are as follows:

10-vehicle; 100-battery pack; 200-a controller; 300-motor; 400-sensor; 501-a collision signal acquisition module; 502-a collision information determination module; 503-a battery collision detection module; 60-an electronic device; 601-a processor; 602-a memory; 603-communication bus.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

Power cells are an important component of power plants. Typically, a power cell will be provided at the bottom of the power plant to improve the balance of the power plant. Taking power equipment as an electric automobile as an example, at present, an electric battery is usually arranged at the position of a ground disc of the electric automobile so as to balance the front and rear counterweights of the electric automobile and reduce the gravity center of the automobile, thereby improving the operability of the electric automobile. However, the bottom of the power plant is easily collided with an external object during operation, resulting in damage to the battery. For example, in the running process of an electric automobile, the ground structure is easily collided by external objects such as pavement protrusions or stones, and the battery is damaged, so that safety accidents such as battery leakage and explosion are induced.

For this reason, in the related art, a sensor is provided at the bottom of the battery to detect whether the battery is collided by the sensor, so that early warning is performed when the collision is detected. However, this method can only determine whether the battery is collided, and cannot perform risk assessment on the collision condition of the battery, so that the collision result of the battery cannot be accurately pre-warned.

In view of the above technical problems, the embodiments of the present application provide a method for detecting a collision of a battery, where the method determines a collision position and a collision force according to a collision signal received from a sensor, so as to obtain a collision detection result of the battery by using the collision position and the collision force and parameter variation information of the battery obtained in response to the collision signal, so that when the battery is collided, the collision detection of the battery can be performed by using the collision position, the collision force and the parameter variation of the battery, thereby being beneficial to accurately evaluating the collision condition of the battery and improving the accuracy of early warning on the collision result of the battery.

The method, the device, the electronic device and the storage medium for detecting the collision of the battery disclosed by the embodiment of the application can be applied to power equipment which adopts the battery as a power source, and the power equipment comprises, but is not limited to, electric devices such as vehicles, ships or aircrafts.

For convenience of description, the following embodiment will be described taking a power plant according to an embodiment of the present application as an example of the vehicle 10.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 10 according to some embodiments of the present application. The vehicle 10 may be a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, an extended range vehicle, or the like. The bottom of the vehicle 10 is provided with a battery pack 100. The battery pack 100 may be used for power supply of the vehicle 10, for example, the battery pack 100 may serve as an operating power source of the vehicle 10. The vehicle 10 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery pack 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 10.

In some embodiments of the present application, the battery pack 100 may be used not only as an operating power source for the vehicle 10, but also as a driving power source for the vehicle 10, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 10.

Here, the battery pack 100 is used as a driving power source of the vehicle 10 as a driving power source provided by the vehicle 10 in the present application.

In some embodiments of the present application, as shown in fig. 2, at least one face of the battery pack 100, such as the bottom face of the battery pack 100, may be provided with a plurality of sensors 400. Wherein the sensor 400 may be a vibration sensor or a piezoresistive sensor. The vibration sensor is a sensor based on piezoelectric effect, and is a self-generating type and electromechanical conversion type sensor. Its sensitive element is made of piezoelectric material. The piezoelectric material generates charges on the surface after being stressed, and the charges are amplified and converted into electric signals which are directly proportional to the external force after being amplified by the charge amplifier and the measuring circuit. The working principle of the piezoresistive sensor is based on the thin film resistance effect, namely, when pressure is applied from the outside, the resistance value on the sensing element of the piezoresistive sensor changes. In general, the sensing element is formed by a layer of thin film resistor, when external pressure acts on the thin film, the resistance value changes due to deformation of the thin film, and the changed resistance value is converted into a corresponding electric signal through a circuit to be output, so that the impact force of the collision can be determined by using the electric signal.

According to some embodiments of the present application, a method for detecting a collision of a battery is provided, and the method may be applied to the foregoing controller, so as to implement collision detection of a battery having a plurality of sensors disposed on a surface thereof. As shown in fig. 3, the collision detection method of the battery includes:

s101, acquiring collision signals sent by a sensor;

s102, determining collision information of a battery according to a collision signal;

s103, obtaining a collision detection result of the battery according to the collision information and parameter change information of the battery obtained in response to the collision signal;

the collision information includes a collision position and a collision force.

In some embodiments, in the case of a collision of a battery with a sensor disposed on the surface, the battery is sensed by the sensor, so as to send a corresponding sensing signal, i.e., a collision signal, to the controller. The sensor is exemplified by a piezoresistive sensor, when the bottom surface of the battery provided with the piezoresistive sensor collides, the resistance value on the piezoresistive sensor can be changed, the changed resistance is converted into a corresponding electric signal and output to the controller, and the controller can receive the collision signal comprising the electric signal.

When collision occurs, a plurality of sensors can generate electric signals, namely a plurality of electric signals exist in the collision signals, and the sizes of the electric signals can be different, namely the electric signals of the sensors which are closer to the collision position are larger, so that the positions of the plurality of sensors on the surface of the battery can be calibrated in advance, and the preset positioning identification points of the sensors are determined. When the collision signal is received, the largest electric signal in the collision signal can be extracted, and then the preset positioning mark point of the sensor corresponding to the electric signal is determined as the collision position.

Meanwhile, after the collision signal is received, the electric signal in the collision signal can be subjected to energy conversion so as to obtain the impact force generated by collision. For example, the impact test can be performed on the surface of the battery provided with the plurality of sensors according to a plurality of set impact forces in advance, and the electric signals generated by different impact forces can be determined so as to record the corresponding relation between the impact forces and the electric signals. After receiving the collision signal, the collision force corresponding to the electric signal of the collision signal can be obtained according to the corresponding relation between the collision force and the electric signal, so that the collision force is determined as the collision force received by the battery.

After determining the collision position and the collision force of the battery, the collision detection result of the battery can be generated according to the collision position, the collision force and parameter variation information of the battery acquired in response to the collision signal.

The parameter change information of the battery may include temperature change information of the battery, voltage change information of the battery, or the like, and the parameter change information may be acquired by a BMS (Battery Management System ) of the battery. Considering that when the battery is knocked, if the battery is damaged, the battery temperature and the battery voltage of the battery may change after a period of time and cannot change directly, so that when the collision is detected, namely, a sensor sends a collision signal, the parameter information of the battery can be detected in response to the collision signal until the detection duration reaches a preset duration, and a plurality of parameter information of the battery, which changes with time within the preset duration, can be obtained, and thus, parameter change information is formed based on the plurality of parameter information. And detecting the temperature information of the battery in real time within a preset time period to obtain a plurality of temperature information of the battery which changes along with time within the preset time period, so that a temperature change curve of the battery within the preset time period, namely the temperature change information, can be formed by the plurality of temperature information. The preset time period can be set according to actual conditions, for example, the time period required from the occurrence of the collision of the battery to the change of the temperature or the voltage of the battery under the condition that the battery is damaged due to the collision can be determined through a large amount of test or historical data, so that the time period is determined to be the preset time period.

After the parameter change information of the battery is obtained, the parameter change information and the collision information comprising the collision position and the collision force can be combined to form a collision detection result of the battery, so that the collision detection result of the battery comprising the collision position, the collision size and the collision influence condition can be obtained.

Or, damage evaluation can be performed on damage condition of the battery caused by the collision according to the parameter change information and the collision information, so as to obtain a collision detection result of the battery. For example, the battery damage level corresponding to the data set consisting of the collision position, the collision force section, and the parameter variation section may be set based on the historical collision result. If the data set is the collision position A1, the collision force interval (0N, 803N) and the temperature fluctuation of 0-2 ℃, the corresponding battery damage level is low, or if the collision position A2, the collision force interval (533N, 66N) and the temperature fluctuation of 0-2 ℃ are middle, the parameter change information and the collision information can be compared with the data set after the parameter change information and the collision information are obtained, so that the data set to which the parameter change information and the collision information belong is determined, and the battery damage level corresponding to the parameter change information and the collision information is determined, and the battery collision detection result is obtained according to the battery damage level.

Alternatively, it may be determined whether the parameter variation information is abnormal, such as whether the temperature fluctuation within a preset period exceeds a preset range. If the detected result exceeds the predetermined threshold, the battery damage level is indicated to be high, and the battery damage level is determined to be damaged by the collision. If the collision position and the collision force are not exceeded, determining the battery damage level corresponding to the collision position and the collision force of the battery according to the preset mapping relation between the data pair of the collision position and the collision force section and the battery damage level, and determining the collision detection result of the battery based on the battery damage level.

After the collision detection result of the battery is determined, the collision detection result can be sent to a target terminal, such as a vehicle-mounted terminal of a vehicle carrying the battery, so as to early warn the collision. Meanwhile, the collision position can be synchronously transmitted to the vehicle-mounted terminal so as to prompt the position of the battery where the collision occurs.

The collision signal sent by the sensor is used for determining the collision information comprising the collision position and the collision force of the battery, so that the collision detection result of the battery is obtained according to the collision information and the parameter change information of the battery obtained in response to the collision signal, the collision detection of the battery considers the influence of the collision position, the collision force and the collision on the parameter of the battery, and further the collision condition of the battery can be evaluated more comprehensively, and the accuracy of early warning on the collision result of the battery is improved.

To improve the detection efficiency and detection accuracy of the collision position of the battery when determining the collision position of the battery by the collision signal sent by the sensor, in some embodiments, determining the collision information of the battery according to the collision signal includes: the collision position of the battery is determined according to the area where the sensor that transmits the collision signal is located. Wherein the sensors of the same area are connected in parallel.

In some embodiments, as shown in fig. 4, each sensor 400 may be disposed at a different area of the bottom surface of the battery pack 100, respectively. The bottom surface of the battery pack 100 may be divided into five areas A, B, C, D, E in a front, rear, both sides and middle division manner, each area is provided with at least one sensor 400, and if a certain area is provided with a plurality of sensors 400, the sensors 400 of the area are connected in parallel. In this way, even if a certain sensor 400 in any area fails, the transmission of collision signals can be performed by other available sensors in the area, so that the situation that collision signals cannot be received due to the failure of a single sensor is avoided, the collision detection is more reliable, and the accuracy of the collision detection is improved. The sensors in different areas are connected into the controller through different interfaces, so that the controller can determine the impacted area according to the received impact signals of the sensors, the impact position can be quickly determined without test calibration, and the detection efficiency of the impact position is improved. In order to enable a more accurate collision location to be identified when a subsequent collision occurs at the bottom surface of the battery pack, in some embodiments, each region may also be gridded to divide one region into multiple grids. At least one sensor is arranged in each grid, each grid is provided with a unique position code, and the position code of any grid is bound with the sensor of the grid. In this way, when the bottom surface of the battery pack collides, a corresponding position code can be obtained according to the received collision signal, so that the collision position of the collision can be determined by the position code, and a more accurate collision position can be identified.

In order to improve the detection accuracy of the impact force of the battery when determining the impact force of the battery by the impact signal sent by the sensor, in some embodiments, determining the impact information of the battery according to the impact signal includes:

and determining the impact force of the battery from the preset impact forces calibrated based on the energy intervals according to the signal energy of the impact signal.

In some embodiments, different affordable impact forces may be preset for different energy intervals. For example, the corresponding relation between different energy intervals and different bearable impact forces can be set by combining the protection level test of the electrical equipment shell IK and the principle of impact energy=impact force×impact distance. If the impact height is defined as 150mm from the ground clearance, the energy interval is (20J, 80J), and the corresponding bearable impact force is 533N; the energy interval is (80J, 100J), and the corresponding bearable impact force is 666N; the energy interval is (100J, 120J), and the corresponding bearable impact force is 800N. If the energy interval is less than 20J, the corresponding sustainable impact force is less than 533N. Similarly, if the energy interval exceeds 120J, the corresponding sustainable impact force is more than 800N.

After receiving the collision signal, the signal energy of the collision signal can be calculated according to the electric signal in the collision signal. After the signal energy is obtained, the impact force corresponding to the signal energy can be determined according to the energy interval to which the signal energy belongs.

After the impact force of the battery is obtained, the collision detection result of the battery can be obtained according to the collision information comprising the impact force and the collision position of the battery and the parameter change information of the battery obtained in response to the collision signal. And in the process of actually driving the vehicle, the vehicle is often impacted by road broken stones, and most of the impacts do not affect the battery. Therefore, if all the impacts are detected, a large amount of operation resources are wasted. Therefore, to reduce the computational resources required for collision detection, in some embodiments, obtaining a collision detection result of the battery according to the collision information and parameter variation information of the battery obtained in response to the collision signal includes:

according to the collision information, obtaining a risk assessment result of the battery;

and determining that the risk assessment result reaches a preset risk level, and obtaining a collision detection result of the battery according to the risk assessment result and the parameter change information.

In some embodiments, after the collision information of the battery is obtained according to the collision signal, the battery may be initially subjected to a preliminary risk assessment according to the collision position and/or the collision force in the collision information, so as to obtain a risk assessment result of the battery.

For example, the bottom surface of the battery may be divided into a plurality of regions, as shown in fig. 4, and the bottom surface of the battery may be divided into a front region a, a left region B, a middle region C, a right region D, and a rear region E, while setting risk levels corresponding to the regions. This risk level is used to indicate the likelihood that an impact will damage the battery when the area is impacted. The risk level of the middle area C may be set high, indicating that the probability of battery damage is greatest when the area is impacted. The risk level of the left and right regions B and D may be set to be medium, indicating that the probability of battery damage is medium when the region is impacted. The risk level of the front region a and the rear region may be set low, indicating that the probability of battery damage occurring when the region is impacted is low. It can be understood that the setting manner of the region division and the risk level can be set by actual situations. Thus, after the collision position is determined by the collision signal, the corresponding risk level can be obtained as a risk assessment result according to the region corresponding to the collision position.

Alternatively, the corresponding risk level may be divided for different impact forces first. For example, the protection level of the electrical equipment shell IK can be combined to classify different impact forces. If the impact force is lower than 533N, the corresponding risk level is low; the impact force is 533N-800N, and the corresponding risk level is medium; if the impact force is above 800N, the corresponding risk level is high. Specifically, the correspondence between the impact force and the risk level may be set according to the actual situation. Thus, after the impact force is determined through the impact signal, the corresponding risk level can be obtained as a risk assessment result according to the interval in which the impact force is located.

Alternatively, different impact force intervals may be divided in advance for different areas. If the impact force of the front area A is lower than 600N, the corresponding risk level is low; the impact force is 600N-900N, and the corresponding risk level is medium; the impact force is above 900N, and the corresponding risk level is high. For the middle area C, the impact force is lower than 533N, and the corresponding risk level is low; the impact force is 533N-800N, and the corresponding risk level is medium; if the impact force is above 800N, the corresponding risk level is high. Specifically, the correspondence between impact force and risk level in different areas can be set according to actual situations, for example, determined by a large number of battery impact tests. Therefore, when the preliminary risk assessment of the battery is carried out, the risk assessment result of the battery can be determined jointly by combining the two factors of the collision position and the collision force, so that the obtained risk assessment result is more accurate.

After the risk assessment result of the battery is obtained, whether the risk assessment result reaches a preset risk level or not can be judged, and if so, whether the risk assessment result reaches a medium risk or not can be judged. If the risk level does not reach the preset risk level, the fact that the vehicle is not damaged by the collision is indicated, detection of a collision detection result is not needed at the moment, and meanwhile the collision information of the time can be displayed without being synchronized to the vehicle-mounted terminal. If the risk level reaches the preset risk level, the damage to the vehicle caused by the collision is indicated, and then the collision detection result of the battery is obtained according to the risk assessment result and the parameter change information.

The step of obtaining the collision detection result of the battery according to the risk assessment result and the parameter variation information may be that after the risk assessment result is determined to reach a preset risk level, the parameter variation of the battery, such as at least one of voltage variation and temperature variation, is detected to obtain the parameter variation information of the battery, and then the risk assessment result and the parameter variation information are used as the collision detection result of the battery and sent to the vehicle-mounted terminal of the battery. Or, the method may be to detect a change trend of parameter change information of the battery, for example, detect a voltage change trend or a temperature change trend of the battery, and if the change trend is an increase, directly determine that the collision detection result of the battery is that the battery damage level is high; otherwise, the grade corresponding to the risk assessment result of the battery can be used as the battery damage grade of the battery. Alternatively, a plurality of parameter variation sections, such as a plurality of temperature variation sections [0,2 ℃), [2 ℃,4 ℃), [4 ℃,6 ℃) and the like, may be preset, and each section corresponds to a different risk level. After the parameter change information is obtained, the highest temperature value and the lowest temperature value can be obtained from the parameter change information to determine the absolute value of the difference value of the highest temperature value and the lowest temperature value, and then the risk level corresponding to the parameter change information is determined according to the temperature change interval in which the absolute value is located. If the risk level corresponding to the parameter change information is high, the collision detection result of the battery can be directly determined to be high in battery damage level; otherwise, the grade corresponding to the risk assessment result of the battery can be used as the battery damage grade of the battery.

According to the risk assessment result of the battery is obtained according to the collision information, so that the collision detection result of the battery is obtained according to the risk assessment result and the parameter change information under the condition that the risk assessment result reaches the preset risk level, and therefore the collision lower than the preset risk level can be filtered, the collision detection is carried out only for the collision reaching the preset risk level, resources consumed by the collision detection are reduced, and the collision detection efficiency is improved.

In order to improve accuracy of the risk assessment result, in some embodiments, obtaining the risk assessment result of the battery according to the collision information includes:

determining a corresponding risk threshold according to the area where the collision position in the collision information is located;

obtaining a risk assessment result of the battery according to a comparison result of the impact force in the collision information and the risk threshold value;

wherein the risk threshold is determined from historical impact information for the region.

In some embodiments, the impact force of 533N may not damage the impacted battery, while the impact force of 533N may damage the impacted battery, given that the durability of the impacted and non-impacted batteries is not consistent. Therefore, after determining the collision position according to the collision information, the area of the bottom surface of the battery where the collision position is located can be determined first to acquire the historical collision information of the area. And then, according to the historical collision information, searching the bearable collision force corresponding to the historical collision information from a mapping table recorded with the corresponding relation between each preset collision information and each bearable collision force as a risk threshold corresponding to the area.

For example, the historical collision information for any one zone may include a historical number of collisions, i.e., the number of collisions experienced by that zone prior to the current collision. The controller can pre-store a mapping table recorded with different preset collision times and different corresponding relations of the bearable impact force, if the preset collision times are 0, the bearable impact force is 533N; the number of preset collisions is 3, and the sustainable impact force is 500N. The specific correspondence may be set according to the actual situation. After determining the area where the collision occurs, the historical collision frequency of the area can be obtained, and is assumed to be 3, then the historical collision frequency is matched with the mapping table, so that the sustainable impact force 500N corresponding to the historical collision frequency is found out from the mapping table, and the risk threshold corresponding to the area is determined.

Alternatively, the historical collision information of any area may also include the historical total collision force of that area, i.e., the sum of the collision forces of each collision of that area prior to the current collision. The controller can pre-store a mapping table recorded with different preset total impact forces and corresponding relations of different bearable impact forces, if the preset total impact force is 0, the bearable impact force is 533N; if the total impact force is 533N, the sustainable impact force is 500N. The specific correspondence may be set according to the actual situation. After determining the area where the collision occurs, the historical total impact force of the area is obtained, assuming that the historical total impact force is 0, and then the historical total impact force is matched with the mapping table, so that the sustainable impact force 533N corresponding to the historical total impact force is found out from the mapping table, and the risk threshold corresponding to the area is determined.

After the risk threshold of the area where the collision position is located is obtained, the risk threshold can be compared with the impact force obtained according to the impact signal. If the risk threshold is larger than the impact force, the impact is in an acceptable range, and at the moment, the risk assessment result of the battery can be determined to be a low risk level; if the risk threshold is smaller than the impact force, the impact is out of the bearable range, and the risk assessment result of the battery can be determined to be above the risk level. Or, a preset value can be preset, if the risk threshold is smaller than the impact force and the absolute value of the difference between the risk threshold and the impact force is smaller than or equal to the preset value, the risk assessment result of the battery can be determined to be a risk level; if the risk threshold is smaller than the impact force and the absolute value of the difference between the risk threshold and the impact force exceeds a preset value, the risk assessment result of the battery can be determined to be a high risk level.

The risk threshold value of the area is determined through the historical impact information of the impacted area, so that the risk assessment result of the battery is obtained according to the comparison result of the impact force in the impact information and the risk threshold value, the historical impact condition of the impacted area is considered in the risk assessment of the battery, and the accuracy of the risk assessment result is improved.

In some embodiments, considering that the battery may deform due to impact, and the voltage and temperature of the battery generally change when the battery deforms, when the collision detection result of the battery is determined according to the collision information and the parameter change information of the battery, the deformation information of the battery may be obtained according to the collision information and the parameter change information of the battery in addition to the damage level of the battery. The possibility of deformation of the battery can be judged according to the collision information and the parameter change information of the battery.

For example, the risk assessment level of the battery may be determined based on the collision information. If the risk assessment level of the battery reaches a preset risk level, for example, a medium risk level, it indicates that the battery may be deformed due to the impact, and at this time, parameter change information of the battery, for example, voltage change information or temperature change information, may be detected. For example, if the parameter variation information includes voltage variation information, the voltage variation information may be detected to determine whether the voltage variation of the battery is a voltage variation; if yes, the deformation of the battery caused by the impact can be judged, and at the moment, the deformation information of the battery can be determined to be that the battery deforms; otherwise, it can be judged that the impact does not cause deformation of the battery. The temperature change information is the same. Or, in the voltage variation information, whether the difference between the maximum voltage value and the minimum voltage value reaches a preset value or not can be judged; if so, the deformation information of the battery can be determined to be that the battery deforms; otherwise, the deformation information of the battery can be determined as that the battery is not deformed.

The collision detection result comprising the deformation information of the battery is obtained through the collision information and the parameter change information, so that the obtained collision detection result is more comprehensive, and the accuracy of early warning on the collision result of the battery is further improved.

In order to make the detected deformation information more accurate, in some embodiments, the damaged information of the water cooling component of the battery may be obtained according to the collision information and the temperature change in the parameter change information, so as to determine the deformation information of the battery according to the damaged information of the water cooling component.

The damage information may be a determination result indicating whether the water cooling assembly is damaged. For example, the risk assessment level of the battery may be determined based on the collision information. If the risk assessment level of the battery reaches a preset risk level, if the risk assessment level reaches a medium risk level, the risk assessment level indicates that the water cooling assembly may be damaged due to the impact, and at the moment, the temperature change of the battery can be detected to judge whether the temperature change of the battery is large or not; if so, judging that the water cooling effect of the water cooling assembly is reduced, and determining that the water cooling assembly is damaged at the moment; otherwise, it may be determined that the water cooling assembly is not damaged. Or, in the parameter variation information, whether the difference between the maximum temperature value and the minimum temperature value reaches a preset value or not can be judged; if yes, the damage of the water cooling assembly can be determined; otherwise, it may be determined that the water cooling assembly is not damaged.

If the water cooling assembly is determined to be damaged, the deformation of the battery can be indicated, otherwise, the deformation of the battery can be indicated.

To further refine the deformation detection of the battery, in some embodiments, the damage information may also include at least one of crack diameter or cooling water flow rate of the water cooling assembly. The controller can record crack diameters or cooling water flow corresponding to different temperature differences under any risk assessment grade in advance. If the impact force of a certain area under a high risk level can be correspondingly measured, the area is subjected to multiple impact tests, then the temperature difference between the maximum temperature and the minimum temperature in a preset period after each impact is measured, and the crack diameter or the cooling water flow of the water cooling assembly after each impact is measured, so that the average value of the measured temperature difference after each impact is mapped with the average crack diameter or the average cooling water flow of the water cooling assembly after each impact, and the crack diameter or the cooling water flow corresponding to the temperature difference is obtained. Or, mapping the average value of the temperature difference measured after each impact with the minimum crack diameter or the minimum cooling water flow of the water cooling assembly after each impact to obtain the crack diameter or the cooling water flow corresponding to the temperature difference. In this way, crack diameters or cooling water flow corresponding to different temperature differences in any region under any risk assessment grade can be obtained.

After the collision information and the parameter change information of the battery in the preset period are obtained, the risk assessment grade reached by the battery can be determined according to the collision position and the collision force in the collision information. After the risk assessment level is determined, crack diameters or cooling water flows corresponding to different temperature differences can be determined based on the risk assessment level, so that the crack diameters or cooling water flows of the water cooling components of the battery can be obtained according to the temperature differences matched with the temperature changes in the parameter change information of the battery in the temperature differences.

After the crack diameter or cooling water flow of the water cooling assembly is obtained, the crack diameter or cooling water flow of the water cooling assembly can be used as deformation information of the battery. In addition, the deformation information of the battery can be synchronized to the vehicle-mounted terminal under the condition that the crack diameter of the water cooling assembly is larger than 0 or the cooling water flow is smaller than the cooling water flow of the water cooling assembly under the normal condition.

The crack diameter or the cooling water flow of the water cooling component of the battery is evaluated through the collision information and the temperature change in the parameter change information, so that the deformation information of the battery is determined based on an evaluation result, the specific deformation condition of the battery can be determined, and the accuracy of the detected deformation information is improved.

In order to improve the safety of the battery, in some embodiments, the method for detecting the collision of the battery further includes: and adjusting the output power of the battery according to the collision detection result.

In some embodiments, after the collision detection result is obtained, if the collision detection result includes the collision force, the output power of the battery may be adjusted according to the collision force. If the impact force is smaller than 533N, the output power of the battery is controlled to be unchanged; if the impact force is more than or equal to 533N, the output power of the battery is reduced, for example, the output power is reduced to the output power matched with 40 km/h of the vehicle. Alternatively, if the collision detection result includes a battery damage level, the output power of the battery may be adjusted according to the battery damage level. If the damage level of the battery is low, the output power of the battery can be controlled to be unchanged; if the damage level of the battery is medium or high, the output power of the battery can be reduced, thereby improving the safety of the battery.

To more accurately adjust the output power of the battery, in some embodiments, adjusting the output power of the battery based on the collision detection result includes: and adjusting the output power of the battery according to the deformation information of the battery in the collision detection result.

In some embodiments, if the deformation information of the battery is included in the collision detection result, the output power of the battery may be adjusted according to the deformation information of the battery. If the deformation information of the battery is that the battery is not deformed, the output power of the battery is controlled to be unchanged; if the deformation information of the battery is that the battery deforms, the output power of the battery can be reduced.

In some embodiments, after obtaining the collision detection result of the battery, the method further includes:

mapping the collision detection result with power equipment carrying a battery;

and determining the battery collision risk of the power equipment of the same type according to the collision detection results of the power equipment mapping of the same type.

The power equipment can be an electric automobile and the like. And mapping the collision result of each battery with the power equipment carrying the battery, so that all collision detection results mapped by the power equipment can be obtained. After all the collision detection results mapped by the power equipment are obtained, all the collision detection results mapped by the power equipment in the same class can be used as the collision detection results corresponding to the class. If the power equipment is an electric car, the type of the electric car is an X-type car, after the collision detection results mapped by the car are obtained, all the collision detection results of the car with all the X types are used as the collision detection results corresponding to the X types.

After obtaining each collision detection result mapped by the power equipment of the same type, determining the battery collision risk of the power equipment of the same type according to the occurrence times of the collision detection result with high damage level or the occurrence times of the collision detection result with deformation of the battery in each collision detection result. If the occurrence number of the collision detection results with high damage level reaches the first preset number, or the occurrence number of the collision detection results indicating that the battery is deformed reaches the first preset number, determining that the battery collision risk of the power equipment of the type is high; otherwise, it may be determined that the risk of battery collision for this type of power plant is low. Or if the damage level is a high collision detection result or at least one occurrence number of the collision detection results indicating that the battery is deformed reaches a first preset number, determining that the battery collision risk of the power equipment of the type is high; if the damage level is a high collision detection result and the occurrence frequency of the collision detection result indicating that the battery is deformed does not reach the first preset frequency and one of the collision detection results reaches the second preset frequency, determining that the battery collision risk of the power equipment of the type is middle; if the number of occurrence times of the collision detection result indicating that the battery is deformed does not reach the second preset number of times, it is determined that the battery collision risk of the power apparatus of this type is low. The first preset times and the second preset times can be set according to actual conditions.

The collision detection result is mapped with the power equipment carrying the battery, so that the battery collision risk of the power equipment of the same type is determined according to the collision detection results mapped by the power equipment of the same type, and therefore, which type of vehicle is easy to collide can be effectively determined, and the safety and reliability of the vehicle can be effectively evaluated.

Fig. 5 shows a schematic structural diagram of a collision detection device for a battery according to the present application, and it should be understood that the device corresponds to the embodiment of the method performed in fig. 3, and is capable of performing the steps involved in the foregoing method, and specific functions of the device may be referred to in the foregoing description, and detailed descriptions thereof are omitted herein as appropriate to avoid redundancy. The device includes at least one software functional module that can be stored in memory in the form of software or firmware (firmware) or cured in an Operating System (OS) of the device. Specifically, the device is used for collision detection of a battery with a sensor arranged on the surface. The device comprises: a collision signal acquisition module 501, configured to acquire a collision signal sent by a sensor; a collision information determining module 502, configured to determine collision information of the battery according to the collision signal; a battery collision detection module 503, configured to obtain a collision detection result of the battery according to the collision information and parameter variation information of the battery obtained in response to the collision signal; the collision information includes a collision position and a collision force.

According to some embodiments of the present application, the collision information determination module 502 is specifically configured to: determining the collision position of the battery according to the area where the sensor for sending the collision signal is located; wherein the sensors of the same area are connected in parallel.

According to some embodiments of the present application, the collision information determination module 502 is specifically configured to: and determining the impact force of the battery from the preset impact forces calibrated based on the energy intervals according to the signal energy of the impact signal.

According to some embodiments of the present application, the battery collision detection module 503 is specifically configured to: according to the collision information, obtaining a risk assessment result of the battery; and determining that the risk assessment result reaches a preset risk level, and obtaining a collision detection result of the battery according to the risk assessment result and the parameter change information.

According to some embodiments of the present application, the battery collision detection module 503 is specifically configured to: determining a corresponding risk threshold according to the area where the collision position in the collision information is located; obtaining a risk assessment result of the battery according to a comparison result of the impact force in the collision information and the risk threshold value; wherein the risk threshold is determined from historical impact information for the region.

According to some embodiments of the present application, the battery collision detection module 503 is specifically configured to: and obtaining a collision detection result comprising deformation information of the battery according to the collision information and the parameter change information.

According to some embodiments of the present application, the battery collision detection module 503 is specifically configured to: obtaining damage information of a water cooling assembly of the battery according to the collision information and the temperature change in the parameter change information; determining deformation information of the battery according to the damaged information of the water cooling assembly; wherein the damage information includes at least one of a crack diameter or a cooling water flow rate of the water cooling assembly.

According to some embodiments of the present application, the battery collision detection module 503 is further configured to: and adjusting the output power of the battery according to the collision detection result.

According to some embodiments of the present application, the battery collision detection module 503 is specifically configured to: and adjusting the output power of the battery according to the deformation information of the battery in the collision detection result.

According to some embodiments of the present application, the battery collision detection module 503 is further configured to: mapping the collision detection result with power equipment carrying a battery; and determining the battery collision risk of the power equipment of the same type according to the collision detection results of the power equipment mapping of the same type.

According to some embodiments of the present application, as shown in fig. 6, the present application provides an electronic device 60 comprising: processor 601 and memory 602, the processor 601 and memory 602 being interconnected and in communication with each other by a communication bus 603 and/or other form of connection mechanism (not shown), the memory 602 storing a computer program executable by the processor 601, the processor 601 executing the computer program when the computing device is running to perform any of the methods performed by the external machine in alternative implementations, such as: acquiring collision signals sent by a sensor; determining collision information of the battery according to the collision signal; obtaining a collision detection result of the battery according to the collision information and parameter change information of the battery, which is obtained in response to the collision signal; the collision information includes a collision position and a collision force.

The present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs a method in any of the foregoing alternative implementations.

The storage medium may be implemented by any type of volatile or nonvolatile Memory device or combination thereof, such as static random access Memory (Static Random Access Memory, SRAM), electrically erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), erasable Programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), programmable Read-Only Memory (PROM), read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.

The present application provides a computer program product which, when run on a computer, causes the computer to perform the method in any of the alternative implementations.

The application provides a powered device, including a battery and the electronic device 60 in the above embodiments. The surface of the battery is provided with a plurality of sensors, and the electronic equipment is connected with the battery and each sensor.

The application provides a power device, which comprises the electronic device 60 in the embodiment, or the electric equipment in the embodiment.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A method for collision detection of a battery, the method being for collision detection of a battery provided with a plurality of sensors on a surface thereof, the method comprising:

acquiring collision signals sent by the sensor;

determining collision information of the battery according to the collision signal;

According to the collision information, a risk assessment result of the battery is obtained;

determining that the risk assessment result reaches a preset risk level, and obtaining a collision detection result comprising deformation information of the battery according to the risk assessment result and parameter change information of the battery, which is obtained in response to the collision signal;

the collision information comprises a collision position and a collision force, and the parameter change information comprises parameter information of battery change along with time.

2. The method of claim 1, wherein determining collision information for the battery based on the collision signal comprises:

and determining the collision position of the battery according to the area where the sensor for transmitting the collision signal is located.

3. The method according to claim 1 or 2, wherein determining collision information of the battery from the collision signal comprises:

and determining the impact force of the battery from preset impact forces calibrated based on energy intervals according to the signal energy of the collision signal.

4. The method of claim 1, wherein obtaining a risk assessment result for the battery based on the collision information comprises:

5. The method according to claim 1, wherein obtaining the collision detection result including deformation information of the battery based on the collision information and the parameter variation information, comprises:

obtaining damage information of a water cooling assembly of the battery according to the collision information and the temperature change in the parameter change information;

determining deformation information of the battery according to the damage information of the water cooling assembly;

wherein the damage information includes at least one of a crack diameter or a cooling water flow rate of the water cooling assembly.

6. The method of claim 1, 2, 4 or 5, further comprising:

and adjusting the output power of the battery according to the collision detection result.

7. The method of claim 6, wherein adjusting the output power of the battery based on the collision detection result comprises:

And adjusting the output power of the battery according to the deformation information of the battery in the collision detection result.

8. The method as recited in claim 1, further comprising:

mapping the collision detection result with power equipment carrying the battery;

and determining the battery collision risk of the power equipment of the same type according to each collision detection result of the power equipment map of the same type.

9. A collision detection device for a battery, the device being for collision detection of a battery provided with a sensor on a surface thereof, the device comprising:

the collision signal acquisition module is used for acquiring collision signals sent by the sensor;

the collision information determining module is used for determining the collision information of the battery according to the collision signal;

the battery collision detection module is used for obtaining a collision detection result comprising deformation information of the battery according to the collision information and parameter change information of the battery, which is obtained in response to the collision signal;

wherein the collision information includes a collision position and a collision force.

10. An electronic device comprising a processor and a memory storing a computer program, characterized in that the processor implements the method of any one of claims 1 to 8 when executing the computer program.

11. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method of any one of claims 1 to 8.

12. An electrical device comprising the electronic device of claim 10 and a battery, wherein a plurality of sensors are disposed on a surface of the battery, and the electronic device is coupled to the battery and each of the sensors.

13. A power plant comprising an electronic device as claimed in claim 10 or an electrical consumer as claimed in claim 12.