Battery protection method, device, circuit, chip, medium and program product

Abstract

The application relates to a battery protection method, device, circuit, chip, medium and program product. The method comprises the following steps: acquiring a battery current; detecting the battery current according to at least two preset trigger conditions; and controlling a protection device to perform battery protection processing when the battery current meets the at least two trigger conditions. The application can improve the protection effect on the battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery protection method, device, circuit, chip, medium, and program product. Background Technology

[0002] With the development of new energy technologies, batteries are being used in an increasingly wide range of applications. Traditionally, fuses are commonly used for overcurrent protection. However, using fuses can complicate system design and necessitates sufficient design margins.

[0003] Currently, active controllable fuses (Pyrofuse) are used to replace traditional fusible fuses. In practical applications, active controllable fuses are combined with comparators to provide overcurrent protection for batteries.

[0004] However, the above protection methods still have the problem of poor battery protection effect. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a battery protection method, apparatus, circuit, chip, medium, and program product that can improve battery protection performance.

[0006] In a first aspect, this application provides a battery protection method, which includes: acquiring battery current; detecting battery current according to at least two preset trigger conditions; and controlling a protection device to perform battery protection processing when the battery current meets at least two trigger conditions.

[0007] In the technical solution of this application embodiment, detection is performed by at least two triggering conditions, which can achieve the effect of multiple judgments, thereby avoiding false triggering caused by interference signals; moreover, the triggering conditions can be set according to the actual situation, thereby achieving a fast response effect.

[0008] In some embodiments, the triggering conditions include a first triggering condition and a second triggering condition. The aforementioned detection of the battery current based on at least two preset triggering conditions includes: detecting whether the battery current meets the first triggering condition; if the battery current meets the first triggering condition, then detecting whether the battery current meets the second triggering condition; if the battery current meets the second triggering condition, then determining that the battery current meets at least two triggering conditions. In the technical solution of this application embodiment, the battery current is detected step-by-step based on the first and second triggering conditions, which can improve the accuracy of detection and avoid the problem of false triggering caused by interference signals; moreover, the response speed is also faster, which can improve the battery protection effect.

[0009] In some embodiments, the first triggering condition includes a preset current threshold. The aforementioned detection of whether the battery current meets the first triggering condition includes: if the battery current is greater than the preset current threshold, then determining that the battery current meets the first triggering condition. In the technical solution of this application embodiment, the preset current threshold allows for rapid and accurate triggering judgment, thereby achieving a fast response speed.

[0010] In some embodiments, the method further includes: if the battery current is less than or equal to a preset current threshold, then returning to the step of obtaining the battery current. In the technical solution of this application embodiment, the preset current threshold allows for quick and accurate trigger judgment, thereby achieving a fast response speed.

[0011] In some embodiments, the second triggering condition includes a preset integration threshold. The detection of whether the battery current meets the second triggering condition includes: determining the integral value of the battery current and a preset time period; if the integral value is greater than the preset integration threshold, then it is determined that the battery current meets at least two triggering conditions. In the technical solution of this application embodiment, by using a preset integration threshold to determine the battery current within a preset time period, it quickly determines whether triggering is necessary. This not only avoids false triggering caused by interference signals but also provides a fast response speed, improving the protection effect on the battery.

[0012] In some embodiments, the method further includes: if the integral value is less than or equal to a preset integral threshold, sending first fault information to the controller, wherein the first fault information is used to characterize that the battery current meets a first triggering condition. In the technical solution of this application embodiment, by judging the battery current within a preset time period using a preset integral threshold, it is possible to quickly determine whether triggering is required. This not only avoids false triggering caused by interference signals but also provides a fast response speed, thereby improving the protection effect on the battery.

[0013] In some embodiments, the method further includes: sending second fault information to the controller when the battery current meets at least two triggering conditions, the second fault information being used to characterize that the battery current meets at least two triggering conditions. In the technical solutions of this application embodiment, the controller can take corresponding measures based on the second fault information, thereby further protecting the battery; alternatively, the second fault information can be stored for easy reference by maintenance personnel during subsequent battery maintenance.

[0014] Secondly, this application also provides a battery protection device. The device includes:

[0015] Current acquisition module, used to acquire battery current;

[0016] The condition detection module is used to detect the battery current based on at least two preset trigger conditions;

[0017] The protection module is used to control the protection device to perform battery protection processing when the battery current meets at least two trigger conditions.

[0018] In the technical solution of this application embodiment, detection is performed by at least two triggering conditions, which can achieve the effect of multiple judgments, thereby avoiding false triggering caused by interference signals; moreover, the triggering conditions can be set according to the actual situation, thereby achieving a fast response effect.

[0019] Thirdly, this application also provides a battery protection circuit. The battery protection circuit includes a battery management chip and a protection device; the battery management chip is connected to both the battery and the protection device, and the protection device is connected to the battery; the battery management chip is used to acquire the battery current, detect the battery current according to at least two preset trigger conditions, and send a control command to the protection device when the battery current meets the at least two trigger conditions; the protection device is used to perform battery protection processing according to the control command.

[0020] In the technical solution of this application embodiment, the use of a battery protection circuit can achieve the effect of multiple judgments, thereby avoiding false triggering caused by interference signals; moreover, the triggering conditions can be set according to the actual situation, thereby achieving a fast response effect.

[0021] Fourthly, this application also provides a battery management chip, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method described in the first aspect.

[0022] Fifthly, this application also provides a computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements the method described in the first aspect.

[0023] Sixthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect. Attached Figure Description

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the alternative embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0025] Figure 1 This is a schematic diagram illustrating the application environment of a battery protection method according to an embodiment of this application;

[0026] Figure 2This is a schematic flowchart of a battery protection method according to an embodiment of this application;

[0027] Figure 3 This is a flowchart illustrating the steps of detecting battery current according to at least two preset triggering conditions according to an embodiment of this application.

[0028] Figure 4 This is a schematic flowchart of a battery protection method according to another embodiment of this application;

[0029] Figure 5 This is a structural block diagram of a battery protection device according to an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the structure of a battery protection circuit according to an embodiment of this application;

[0031] Figure 7 This is a schematic diagram of the battery protection circuit according to another embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the structure of a battery management chip according to an embodiment of this application;

[0033] Explanation of reference numerals in the attached figures:

[0034] Battery protection circuit 10, battery 11, controller 12, communication component 13;

[0035] Battery management chip 101, protection device 102. Detailed Implementation

[0036] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0037] Unless otherwise defined, 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0038] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0039] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0041] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0042] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] With the development of new energy technologies, batteries are being used in an increasingly wide range of applications. Traditionally, fuses are used for overcurrent protection. However, using fuses can complicate system design and requires sufficient design margin. Currently, active controllable fuses (Pyrofuse) are being used to replace traditional fuses. In practical applications, Pyrofuse is combined with a comparator to provide overcurrent protection. However, this protection method may be subject to false triggering by interference signals or failure to trigger due to conservative parameter settings, thus still resulting in inadequate battery protection.

[0044] This application provides a battery protection scheme that acquires the battery current; detects the battery current based on at least two preset trigger conditions; and controls a protection device to perform battery protection processing when the battery current meets the at least two trigger conditions. This application's method of detecting the battery current based on at least two trigger conditions avoids the problems of false triggering by interference signals and non-triggering due to conservative parameter settings, achieving strong anti-interference capability, fast response, and better battery protection.

[0045] The battery protection method provided in this application embodiment can be applied to, for example... Figure 1 The application environment shown includes a battery protection circuit 10 and a battery 11, with the battery protection circuit 10 connected to the battery 11. The battery protection circuit 10 may include a battery management chip. The battery 11 can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft.

[0046] According to some embodiments of this application, refer to Figure 2 A battery protection method is provided, which may include the following steps:

[0047] Step 201: Obtain the battery current.

[0048] There are several ways to acquire battery current in a battery protection circuit. In one embodiment, a current sensor is included in the battery protection circuit and connected to the battery. The battery protection circuit acquires the battery current through the current sensor. In another embodiment, a voltage sensor is included in the battery protection circuit and connected to the battery. The battery protection circuit acquires the voltage through the voltage sensor and determines the battery current based on the acquired voltage. This application does not limit the acquisition method; it can be selected according to the actual situation.

[0049] It should be noted that the battery current mentioned above can be either the charging current or the discharging current of the battery.

[0050] Step 202: Detect the battery current according to at least two preset trigger conditions.

[0051] The battery protection circuit pre-sets at least two trigger conditions. After acquiring the battery current, it detects the battery current based on these two trigger conditions to determine whether the battery current meets each trigger condition. If the battery current meets at least two trigger conditions, step 203 is executed.

[0052] Understandably, traditional technology combines an active controllable fuse with a comparator, where the comparator determines the signal and triggers the active controllable fuse to turn off. However, interference signals can easily cause the comparator to mis-trigger, and conservative comparator parameter settings may result in no triggering. The embodiments of this application, however, detect the fuse using at least two trigger conditions, achieving a multi-judgment effect and thus avoiding mis-triggering caused by interference signals. Moreover, the trigger conditions can be set according to actual conditions, thereby achieving a fast response.

[0053] Step 203: If the battery current meets at least two triggering conditions, the control protection device performs battery protection processing.

[0054] The battery protection circuit may include a protection device that is connected to both the battery and the charging port, or the protection device may be connected to both the battery and the electrical appliance.

[0055] If the battery current meets at least two triggering conditions, it indicates that the battery needs protection. Therefore, the battery protection circuit controls the protection device to perform battery protection processing.

[0056] For example, if the battery current is the charging current, and the charging current reaches a level requiring battery protection, the protection device will disconnect the battery from the charging port to protect the battery. Alternatively, if the battery current is the discharging current, and the discharging current reaches a level requiring battery protection, the protection device will disconnect the battery from the electrical appliance to protect the battery.

[0057] In the aforementioned battery protection method, the battery current is acquired; the battery current is detected according to at least two preset trigger conditions; and when the battery current meets at least two trigger conditions, the protection device is controlled to perform battery protection processing. This embodiment of the application uses at least two trigger conditions for detection, which can achieve a multi-judgment effect, thereby avoiding false triggering caused by interference signals; moreover, the trigger conditions can be set according to actual conditions, thus achieving a fast response effect.

[0058] According to some embodiments of this application, the triggering conditions include a first triggering condition and a second triggering condition, as referred to... Figure 3 This involves an implementation method for detecting battery current based on at least two preset trigger conditions, which may include the following steps:

[0059] Step 301: Detect whether the battery current meets the first trigger condition.

[0060] After acquiring the battery current, the battery protection circuit first checks whether the battery current meets the first trigger condition. For example, if the battery current is the charging current, it checks whether the charging current meets the first trigger condition for charging protection; or, if the battery current is the discharging current, it checks whether the discharging current meets the first trigger condition for discharging protection.

[0061] Step 302: If the battery current meets the first trigger condition, then check whether the battery current meets the second trigger condition.

[0062] If the battery current meets the first trigger condition, the next detection stage can proceed, which involves detecting whether the battery current meets the second trigger condition. For example, if the battery current is the charging current, after the charging current meets the first trigger condition, the system further detects whether the charging current meets the second trigger condition for charging protection; or, if the battery current is the discharging current, after the charging current meets the first trigger condition, the system further detects whether the discharging current meets the second trigger condition for discharging protection.

[0063] Step 303: If the battery current meets the second trigger condition, then it is determined that the battery current meets at least two trigger conditions.

[0064] If the battery current is detected to meet the second trigger condition, it indicates that the battery current has reached a point where battery protection is required, thus confirming that the battery current meets at least two trigger conditions.

[0065] For example, if the battery current is the charging current, and the detected charging current meets both the first and second trigger conditions, then the charging current is determined to meet at least two trigger conditions. Alternatively, if the battery current is the discharging current, and the detected discharging current meets both the first and second trigger conditions, then the discharging current is determined to meet at least two trigger conditions.

[0066] In the above embodiments, it is detected whether the battery current meets the first trigger condition; if the battery current meets the first trigger condition, it is detected whether the battery current meets the second trigger condition; if the battery current meets the second trigger condition, it is determined that the battery current meets at least two trigger conditions. This embodiment of the application performs step-by-step detection of the battery current based on the first and second trigger conditions, which can improve the accuracy of detection and avoid the problem of false triggering caused by interference signals; moreover, the response speed is also faster, which can improve the battery protection effect.

[0067] According to some embodiments of this application, the first triggering condition includes a preset current threshold. The above-described implementation of detecting whether the battery current meets the first triggering condition may include: if the battery current is greater than the preset current threshold, then determining that the battery current meets the first triggering condition.

[0068] After obtaining the battery current, it can be compared with a preset current threshold to determine if the battery current exceeds the preset current threshold. If the battery current exceeds the preset current threshold, it indicates that the battery current is too high, thus confirming that the battery current meets the first trigger condition.

[0069] It should be noted that the first triggering condition may also include a preset voltage threshold. In practical applications, the target voltage is first determined based on the battery current, and then the target voltage is compared with the preset voltage threshold to determine whether the target voltage is greater than the preset voltage threshold; if the target voltage is greater than the preset voltage threshold, then the battery current is determined to meet the first triggering condition. This application does not limit the first triggering condition; it can be set according to actual conditions.

[0070] Based on the above embodiments, the embodiments of this application may further include: if the battery current is less than or equal to a preset current threshold, then return to the step of obtaining the battery current.

[0071] The battery current is compared with a preset current threshold. If the battery current is less than or equal to the preset current threshold, it indicates that the battery current is not large enough. Therefore, it is determined that the battery current does not meet the first trigger condition, and the battery current is continued to be acquired.

[0072] In the above embodiments, during the process of detecting whether the battery current meets the first trigger condition, if the battery current is greater than a preset current threshold, it is determined that the battery current meets the first trigger condition; if the battery current is less than or equal to the preset current threshold, the process returns to the step of obtaining the battery current. This embodiment of the application, by using a preset current threshold, can quickly and accurately perform trigger judgment, thereby achieving a fast response speed.

[0073] According to some embodiments of this application, the second triggering condition includes a preset integration threshold. The above-described implementation of detecting whether the battery current meets the second triggering condition may include: determining the integration value of the battery current and a preset duration; if the integration value is greater than the preset integration threshold, then determining that the battery current meets at least two triggering conditions.

[0074] After determining that the battery current meets the first trigger condition, the battery current is integrated over a preset time period to obtain an integral value. Then, the integral value is compared with a preset integration threshold to determine whether the integral value is greater than the preset integration threshold. If the integral value is greater than the preset integration threshold, it indicates that the battery current is relatively large within the preset time period. Therefore, it is determined that the battery current meets both the first and second trigger conditions, and thus the battery current meets at least two trigger conditions.

[0075] It should be noted that the second triggering condition may also include a preset quantization value. In practical applications, after determining that the battery current meets the first preset condition, the battery current can be mapped according to a pre-set mapping relationship to obtain a target quantization value; the target quantization value is compared with the preset quantization value; if the target quantization value is greater than the preset quantization value, it is determined that the battery current meets both the first and second triggering conditions, thus determining that the battery current meets at least two triggering conditions. This application embodiment does not limit the second triggering condition and can set it according to actual conditions.

[0076] Based on the above embodiments, the embodiments of this application may further include: if the integral value is less than or equal to a preset integral threshold, then sending a first fault information to the controller, wherein the first fault information is used to characterize that the battery current meets the first triggering condition.

[0077] The integral value is compared with a preset integral threshold. If the integral value is less than or equal to the preset integral threshold, it indicates that the battery current is not continuously large within a preset time period. Therefore, it is determined that the battery current only meets the first trigger condition and does not meet the second trigger condition. In this case, a first fault message is sent to the controller, which notifies the controller that the battery current meets the first trigger condition. After receiving the first fault message, the controller can take corresponding measures based on the first fault message, or it can store the first fault message for maintenance personnel to review later when maintaining the battery. This application embodiment does not limit the controller's processing; it can be set according to actual conditions.

[0078] In the above embodiments, during the process of detecting whether the battery current meets the second triggering condition, the integral value of the battery current and a preset time period is determined; if the integral value is greater than a preset integral threshold, it is determined that the battery current meets at least two triggering conditions; if the integral value is less than or equal to the preset integral threshold, a first fault message is sent to the controller. This embodiment of the application uses a preset integral threshold to determine the battery current within a preset time period, quickly determining whether triggering is necessary. This not only avoids false triggering caused by interference signals but also provides a fast response speed, improving the protection effect on the battery.

[0079] According to some embodiments of this application, it may also include: sending a second fault message to the controller when the battery current meets at least two triggering conditions, wherein the second fault message is used to characterize that the battery current meets at least two triggering conditions.

[0080] If the battery current meets at least two triggering conditions, the battery protection circuit, on the one hand, controls the protection device to perform battery protection processing, and on the other hand, sends a second fault message to the controller. This second fault message can notify the controller that the battery current meets at least two triggering conditions. After receiving the second fault message, the controller can take corresponding measures based on the second fault message, or it can store the second fault message. The embodiments of this application do not limit the processing of the controller, and can be set according to the actual situation.

[0081] In the above embodiments, a second fault message is sent to the controller when the battery current meets at least two triggering conditions. Sending the second fault message to the controller in this embodiment allows the controller to take appropriate measures to further protect the battery; alternatively, the second fault message can be stored for easy reference by maintenance personnel during subsequent battery maintenance.

[0082] According to some embodiments of this application, refer to Figure 4 A battery protection method is provided, which may include the following steps:

[0083] Step 401: Obtain the battery current.

[0084] Step 402: If the battery current is less than or equal to the preset current threshold, then return to step 401.

[0085] Step 403: If the battery current is greater than the preset current threshold, then the battery current is determined to meet the first trigger condition.

[0086] Step 404: Determine the integral value of the battery current and the preset duration.

[0087] Step 405: If the integral value is less than or equal to the preset integral threshold, a first fault information is sent to the controller. The first fault information is used to indicate that the battery current meets the first trigger condition.

[0088] Step 406: If the integral value is greater than the preset integral threshold, it is determined that the battery current meets at least two triggering conditions. The control protection device performs battery protection processing and sends a second fault information to the controller. The second fault information is used to characterize that the battery current meets at least two triggering conditions.

[0089] In the above embodiments, the battery current is acquired; if the battery current is less than or equal to a preset current threshold, the battery current is acquired again; then, the battery current is compared with the preset current threshold. If the battery current is greater than the preset current threshold, it indicates that the battery current is too large, and the battery current is determined to meet the first trigger condition. Next, the integral value of the battery current and a preset time is determined, and the integral value is compared with a preset integral threshold. If the integral value is less than or equal to the preset integral threshold, it indicates that the excessive battery current is not continuous, and the battery current is determined to meet only the first trigger condition and not the second trigger condition, and this situation is notified to the controller through a first fault message. If the integral value is greater than the preset integral threshold, it indicates that the excessive battery current is continuous and not intermittent, and the battery current is determined to meet both the first and second trigger conditions, that is, the battery current is determined to meet at least two trigger conditions. In this case, the control protection device performs battery protection processing, and this situation is notified to the controller through a second fault message.

[0090] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0091] Based on the same inventive concept, this application also provides a battery protection device for implementing the battery protection method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more battery protection device embodiments provided below can be found in the limitations of the battery protection method described above, and will not be repeated here.

[0092] In one embodiment, refer to Figure 5 A battery protection device is provided, comprising:

[0093] Current acquisition module 501 is used to acquire battery current;

[0094] The condition detection module 502 is used to detect the battery current according to at least two preset trigger conditions;

[0095] The protection module 503 is used to control the protection device to perform battery protection processing when the battery current meets at least two trigger conditions.

[0096] In some embodiments, the triggering conditions include a first triggering condition and a second triggering condition. The condition detection module 502 is specifically used to detect whether the battery current meets the first triggering condition; if the battery current meets the first triggering condition, then detect whether the battery current meets the second triggering condition; if the battery current meets the second triggering condition, then determine that the battery current meets at least two triggering conditions.

[0097] In some embodiments, the first triggering condition includes a preset current threshold. The condition detection module 502 is specifically used to determine that the battery current meets the first triggering condition if the battery current is greater than the preset current threshold.

[0098] In some embodiments, the condition detection module 502 is specifically used to return to the step of obtaining the battery current if the battery current is less than or equal to a preset current threshold.

[0099] In some embodiments, the second triggering condition includes a preset integration threshold. The condition detection module 502 is specifically used to determine the integration value of the battery current and the preset duration. If the integration value is greater than the preset integration threshold, it is determined that the battery current meets at least two triggering conditions.

[0100] In some embodiments, the device further includes:

[0101] The first information sending module is used to send a first fault information to the controller if the integral value is less than or equal to a preset integral threshold. The first fault information is used to indicate that the battery current meets the first triggering condition.

[0102] In some embodiments, the device further includes:

[0103] The second information sending module is used to send a second fault information to the controller when the battery current meets at least two trigger conditions. The second fault information is used to indicate that the battery current meets at least two trigger conditions.

[0104] Each module in the aforementioned battery protection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0105] According to some embodiments of this application, refer to Figure 6A battery protection circuit 10 is provided. The battery protection circuit 10 includes a battery management chip 101 and a protection device 102; the battery management chip 101 is connected to both the battery and the protection device 102, and the protection device 102 is connected to the battery; the battery management chip 101 is used to acquire the battery current, detect the battery current according to at least two preset trigger conditions, and send a control command to the protection device 102 when the battery current meets at least two trigger conditions; the protection device 102 is used to perform battery protection processing according to the control command.

[0106] In this embodiment, the battery protection circuit 10 includes a battery management chip 101 and a protection device 102. The battery management chip 101 is connected to the battery 11 and the protection device 102, respectively, and the protection device 102 is connected to the battery 11.

[0107] The battery management chip 101 can acquire the battery current and then detect the battery current according to at least two preset trigger conditions. For example, it detects whether the battery current meets a first trigger condition. If the battery current meets the first trigger condition, it detects whether the battery current meets a second trigger condition. If the battery current also meets the second trigger condition, it is determined that the battery current meets at least two trigger conditions. In this case, a control command is sent to the protection device 102. The protection device 102 receives the control command and performs battery protection processing according to the control command.

[0108] The aforementioned battery management chip 101 can be a 12V BMS (Battery Management System) ASIC (Application Specific Integrated Circuit). This battery management chip 101 has functions such as monitoring battery voltage, current, and temperature. Specifically, the battery management chip 101 can monitor voltage through a 4-channel differential sampling system and monitor battery current by measuring the differential voltage across the shunt.

[0109] The aforementioned protection device 102 can be an actuator switch, which may include a switching transistor, a relay, etc. (See reference...) Figure 7 After determining that the battery current meets at least two trigger conditions, the battery management chip 101 sends a control command to the execution switch. The execution switch then cuts off the connection between the battery and the charging port according to the control command to achieve charging protection for the battery; or, the execution switch cuts off the connection between the battery and the electrical device according to the control command to achieve discharging protection for the battery.

[0110] Understandably, the battery management chip 101 described above can achieve functions such as overvoltage, undervoltage, overcurrent, overtemperature and battery abuse protection by driving the switch to turn on and off.

[0111] Reference Figure 7 The battery protection circuit 10 can be connected to the controller 12, and the controller 12 can also be connected to the communication component 13. The communication component 13 enables communication between the controller and the CAN bus. The controller 12 can be implemented using a microcontroller unit (MCU).

[0112] In the above embodiments, the battery protection circuit includes a battery management chip and a protection device. The battery management chip acquires the battery current, detects the battery current according to at least two preset trigger conditions, and sends a control command to the protection device when the battery current meets at least two trigger conditions. The protection device executes battery protection processing according to the control command. This embodiment uses a battery protection circuit to protect the battery, which can avoid the problems of false triggering by interference signals or failure to trigger due to conservative parameter settings, achieving a better protection effect.

[0113] According to some embodiments of this application, a battery management chip is provided, the internal structure of which can be shown as follows: Figure 8 As shown, this battery management chip includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The I / O interfaces are used for information exchange between the processor and external devices. The memory stores a computer program that, when executed by the processor, implements a battery protection method.

[0114] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0115] According to some embodiments of this application, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory including instructions that can be executed by a processor of a battery management chip to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0116] According to some embodiments of this application, a computer program product is also provided, which, when executed by a processor, can implement the above-described methods. The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, some or all of the above-described methods can be implemented, wholly or partially, according to the processes or functions described in the embodiments of this disclosure.

[0117] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0118] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0119] The embodiments described above merely illustrate several implementation methods of this application to facilitate a detailed understanding of the technical solutions of this application, but should not be construed as limiting the scope of protection of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. It should be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this patent application should be determined by the content of the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. A battery protection method, characterized in that, The method includes: Obtain battery current; The battery current is detected according to at least two preset trigger conditions; If the battery current meets the at least two triggering conditions, the control protection device will perform battery protection processing. The triggering conditions include a first triggering condition and a second triggering condition. The step of detecting the battery current based on at least two preset triggering conditions includes: Detect whether the battery current meets the first trigger condition; If the battery current meets the first trigger condition, then it is detected whether the battery current meets the second trigger condition; If the battery current meets the second trigger condition, then it is determined that the battery current meets the at least two trigger conditions; The second triggering condition includes a preset integration threshold, and detecting whether the battery current meets the second triggering condition includes: Determine the integral value of the battery current and the preset duration; If the integral value is greater than the preset integral threshold, then the battery current is determined to meet the at least two triggering conditions.

2. The method according to claim 1, characterized in that, The first triggering condition includes a preset current threshold, and detecting whether the battery current meets the first triggering condition includes: If the battery current is greater than the preset current threshold, then the battery current is determined to meet the first trigger condition.

3. The method according to claim 2, characterized in that, The method further includes: If the battery current is less than or equal to the preset current threshold, then return to the step of obtaining the battery current.

4. The method according to claim 1, characterized in that, The method further includes: If the integral value is less than or equal to the preset integral threshold, a first fault message is sent to the controller. The first fault message is used to indicate that the battery current meets the first trigger condition.

5. The method according to any one of claims 1-3, characterized in that, The method further includes: If the battery current meets the at least two triggering conditions, a second fault message is sent to the controller, the second fault message being used to characterize that the battery current meets the at least two triggering conditions.

6. A battery protection device, characterized in that, The device includes: Current acquisition module, used to acquire battery current; The condition detection module is used to detect the battery current according to at least two preset trigger conditions; The protection module is used to control the protection device to perform battery protection processing when the battery current meets the at least two triggering conditions; The triggering conditions include a first triggering condition and a second triggering condition. The step of detecting the battery current based on at least two preset triggering conditions includes: Detect whether the battery current meets the first trigger condition; If the battery current meets the first trigger condition, then it is detected whether the battery current meets the second trigger condition; If the battery current meets the second trigger condition, then it is determined that the battery current meets the at least two trigger conditions; The second triggering condition includes a preset integration threshold, and detecting whether the battery current meets the second triggering condition includes: Determine the integral value of the battery current and the preset duration; If the integral value is greater than the preset integral threshold, then the battery current is determined to meet the at least two triggering conditions.

7. A battery protection circuit, characterized in that, The battery protection circuit includes a battery management chip and a protection device; the battery management chip is connected to the battery and the protection device respectively, and the protection device is connected to the battery. The battery management chip is used to acquire the battery current, detect the battery current according to at least two preset trigger conditions, and send a control command to the protection device when the battery current meets the at least two trigger conditions. The protection device is used to perform battery protection processing according to control commands; The triggering conditions include a first triggering condition and a second triggering condition. The step of detecting the battery current based on at least two preset triggering conditions includes: Detect whether the battery current meets the first trigger condition; If the battery current meets the first trigger condition, then it is detected whether the battery current meets the second trigger condition; If the battery current meets the second trigger condition, then it is determined that the battery current meets the at least two trigger conditions; The second triggering condition includes a preset integration threshold, and detecting whether the battery current meets the second triggering condition includes: Determine the integral value of the battery current and the preset duration; If the integral value is greater than the preset integral threshold, then the battery current is determined to meet the at least two triggering conditions.

8. A battery management chip, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 5.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 5.

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