Battery short circuit monitoring method, electronic equipment, storage medium, program product, battery device and electric equipment

Abstract

According to the battery short circuit monitoring method, the electronic equipment, the storage medium, the program product, the battery device and the electric equipment disclosed by the invention, the battery short circuit monitoring method comprises the following steps: when the current of the battery exceeds the preset threshold value, acquiring the external voltage and the internal voltage of the battery within the preset time length; and judging the short circuit type of the battery according to the obtained numerical relationship and dynamic change characteristics of the external pressure and the internal pressure. By monitoring the numerical relationship and dynamic change characteristics of the external pressure and the internal pressure at the same time, the difference characteristics of true short circuit, capacitive short circuit and parallel short circuit can be distinguished, a data acquisition window with a preset time length is combined with numerical relationship analysis, misjudgment caused by instantaneous interference can be effectively filtered, and therefore the recognition precision of the short circuit type can be improved, and the recognition efficiency is improved. And thus, the adaptability of subsequent control strategies is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery short circuit monitoring method, electronic equipment, storage medium, program product, battery device and electrical equipment. Background Art

[0002] With the continuous development of the new energy energy storage battery industry, battery management systems (hereinafter referred to as BMS) are widely used in the energy storage industry. In actual applications, due to incorrect operation, battery short circuits may occur, which may cause battery fires, explosions and other personal safety hazards. Therefore, current BMSs usually have short-circuit protection functions. In related technologies, when it is detected that a current exceeding the normal current is generated in the system, the short-circuit protection function will be triggered. However, the short-circuit monitoring and control strategy in related technologies is relatively simple and cannot make accurate judgments on short-circuit situations, so there is room for improvement. Summary of the Invention

[0003] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery short-circuit monitoring method, electronic device, storage medium, program product, battery device, and power-consuming device, which improve the accuracy of battery short-circuit type determination in at least some scenarios, thereby facilitating the development of control strategies tailored to different short-circuit types.

[0004] The technical solutions of the present invention are as follows.

[0005] A battery short circuit monitoring method, comprising:

[0006] When the current of the battery exceeds a predetermined threshold, obtaining the external pressure and internal pressure of the battery within a preset time period;

[0007] The short circuit type of the battery is determined based on the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure; the short circuit types include true short circuit, capacitive load short circuit, and parallel short circuit.

[0008] In some optional embodiments, determining the short circuit type of the battery according to the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure includes:

[0009] When the external pressure of the battery is continuously lower than the first voltage threshold for a period exceeding a first predetermined period, the short circuit type is determined to be a true short circuit.

[0010] In some optional embodiments, the method further comprises:

[0011] When the short circuit type is determined to be a true short circuit, the control cuts off the current path.

[0012] In some optional embodiments, the current path includes a main discharge path and a current limiting path connected in parallel, the main discharge circuit is adapted to be cut off when the current of the battery exceeds a predetermined threshold, and the controlling of cutting off the current path includes:

[0013] The flow restriction passage is controlled to be cut off.

[0014] In some optional implementations, after controlling to cut off the current path, the method further includes:

[0015] continuously monitoring at least one of an external voltage and a current of the battery;

[0016] When the external pressure of the battery recovers to the first voltage threshold, and / or the current of the battery reverses, the main discharge path is restored.

[0017] In some optional embodiments, the method further comprises:

[0018] When the external pressure of the battery recovers to a second voltage threshold, it is determined that the short circuit type is converted to a parallel short circuit; wherein the second voltage threshold is greater than the first voltage threshold.

[0019] In some optional embodiments, determining whether the external pressure of the battery has recovered to the second voltage threshold includes:

[0020] The external pressure of the battery is collected at predetermined time intervals. When the external pressure exceeds the second voltage threshold three times in a row, it is determined that the external pressure of the battery has recovered to the second voltage threshold.

[0021] In some optional implementations, the first voltage threshold is 2V, and the first predetermined time is 10s.

[0022] In some optional embodiments, determining the short circuit type of the battery according to the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure includes:

[0023] When the external pressure of the battery recovers from being lower than the first voltage threshold to a predetermined normal voltage value within a second predetermined time period, it is determined that the short circuit type is a capacitive load short circuit.

[0024] In some optional embodiments, when the external pressure of the battery recovers from being lower than the first voltage threshold to 0.9 times the internal pressure of the battery within the second predetermined time period, the short circuit type is determined to be a capacitive load short circuit.

[0025] In some optional embodiments, the method further comprises:

[0026] After determining that the short circuit type is a capacitive load short circuit, the current path that is cut off when the current of the battery exceeds a predetermined threshold is controlled to be restored.

[0027] In some optional embodiments, determining the short circuit type of the battery according to the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure includes:

[0028] When the external pressure of the battery is greater than a first voltage threshold, it is determined that the short circuit type is a parallel short circuit.

[0029] In some optional embodiments, the method further comprises:

[0030] After determining that the short circuit type is a parallel short circuit, the battery is controlled to be connected to the circuit through the current limiting path.

[0031] In some optional embodiments, after controlling the battery to connect to the circuit through the current limiting path, the method further includes:

[0032] continuously monitoring at least one of an external voltage and a current of the battery;

[0033] When the external pressure of the battery recovers to the first voltage threshold, and / or the current of the battery reverses, the main discharge path of the battery is restored and the current limiting path is closed.

[0034] In some optional implementations, when the current of the battery exceeds a predetermined threshold, obtaining the external pressure of the battery within a preset time period includes:

[0035] When the current of the battery exceeds a predetermined threshold, the control cuts off the current path of the battery;

[0036] After a first preset time delay, the external pressure of the battery is collected.

[0037] The present invention also discloses an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the battery short circuit monitoring method is implemented.

[0038] The present invention also discloses a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the battery short circuit monitoring method is implemented.

[0039] The present invention also discloses a computer program product, which includes computer instructions. When the computer instructions are executed, the battery short circuit monitoring method is implemented.

[0040] The present invention also discloses a battery device, comprising:

[0041] Batteries, and

[0042] The electronic device; or, the computer-readable storage medium, or, the computer program product.

[0043] The invention also discloses an electrical device comprising the battery device.

[0044] In the aforementioned battery short circuit monitoring method, electronic device, storage medium, program product, battery device, and electrical equipment, the battery short circuit monitoring method obtains the external pressure and internal pressure of the battery within a preset time period when the battery current exceeds a predetermined threshold, and determines the short circuit type of the battery based on the numerical relationship and dynamic change characteristics of the obtained external and internal pressures. By simultaneously monitoring the numerical relationship and dynamic change characteristics of the external and internal pressures, the different characteristics of true short circuits, capacitive short circuits, and parallel short circuits can be distinguished. The data acquisition window of the preset time period combined with the analysis of the numerical relationship can effectively filter out misjudgments caused by transient interference, thereby improving the accuracy of identifying the short circuit type and thus enhancing the adaptability of subsequent control strategies.

[0045] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0047] Figure 1 FIG. 1 is a schematic diagram of the hardware structure of a battery device according to an exemplary embodiment of the present invention.

[0048] Figure 2 FIG. 4 is a flow chart of determining the short circuit type of a battery in a battery short circuit monitoring method according to an exemplary embodiment of the present invention.

[0049] Figure 3 FIG. 4 is a schematic diagram of a short-circuit processing flow of a battery according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0050] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0051] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0052] Ginseng Figures 1 to 3 As shown, in an exemplary embodiment, a battery short circuit monitoring method includes the following steps.

[0053] When the current of the battery exceeds a predetermined threshold, obtaining the external pressure and internal pressure of the battery within a preset time period;

[0054] The short circuit type of the battery is determined based on the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure; the short circuit types include true short circuit, capacitive load short circuit, and parallel short circuit.

[0055] In current battery management systems (BMS), when a current exceeding the normal current is detected in the system, the short-circuit protection function is triggered. The applicant has found that there are three situations that will trigger the short-circuit protection of the battery:

[0056] 1) Due to incorrect operation, the positive and negative poles of the battery are short-circuited, generating a large current (hereinafter referred to as a true short circuit).

[0057] 2) When the external load is connected, the battery charges the load capacitor and generates a large current (hereinafter referred to as load short circuit).

[0058] 3) When battery modules are connected in parallel, there is a voltage difference between the modules, which generates a large current (hereinafter referred to as parallel short circuit).

[0059] In related technologies, the following steps are usually performed:

[0060] 1) If the hardware detects that the current in the circuit is greater than the current protection threshold IREF, it will notify the BMS. Upon receiving this notification, the BMS controls the discharge MOS to disconnect and proceeds to step 2; otherwise, the system operates normally.

[0061] 2) After the delay T1, try to recover and close the discharge MOS.

[0062] 3) Repeat steps 1) and 2). When the recovery action reaches a certain number of times, it is considered that a true short circuit has occurred and the BMS is powered off and shut down. Otherwise, the system returns to normal.

[0063] There are the following shortcomings:

[0064] 1) The problem of parallel short circuit cannot be solved. The parallel short circuit will be misjudged as a real short circuit and the power will be cut off. Even if the power is turned on again, the problem will still exist.

[0065] 2) If the load is short-circuited, frequently powering on and off the load will shorten the service life of the load and may also cause other adverse effects.

[0066] In response to the deficiencies in the relevant technologies and the applicant's research on situations that trigger the short-circuit protection of the battery, the battery short-circuit monitoring method proposed in this application obtains the external pressure and internal pressure of the battery within a preset time period when the current of the battery exceeds a predetermined threshold, and determines the short-circuit type of the battery based on the numerical relationship and dynamic change characteristics of the obtained external and internal pressures.

[0067] By simultaneously monitoring the numerical relationship and dynamic change characteristics of the external pressure and the internal pressure, the difference characteristics of a true short circuit, a capacitive short circuit and a parallel short circuit can be distinguished.

[0068] Specifically, by simultaneously monitoring the dynamic change characteristics of the external pressure V1 and the internal pressure V2 (such as OCV), the different characteristics of true short circuit (continuous voltage collapse), capacitive short circuit (rapid voltage drop but partial recovery) and parallel short circuit (step-by-step voltage drop) can be distinguished.

[0069] True short circuit: The battery is in a true short circuit (short circuit): the current is abnormally large, the voltage continues to collapse, the external pressure of the battery approaches 0V, and the duration is long.

[0070] Capacitive load short circuit: At the moment the current loop is closed, the battery charges the capacitive load again, and the current is abnormally large. As the capacitor is fully charged, the current can return to normal in a relatively short time, and the voltage will also return to normal. That is, the voltage drops rapidly but partially recovers.

[0071] Parallel short circuit: A current loop is formed between parallel modules. If there is a voltage difference between the battery modules, because the internal resistance of the battery in the module is very small, when the voltage difference exceeds a certain value, an abnormally large current will flow between the modules. As the module with higher voltage charges the module with lower voltage, the voltage difference between the modules will gradually decrease, and the current will also gradually decrease. For any module, the external pressure will gradually return to normal.

[0072] The preset data acquisition window combined with numerical relationship analysis can effectively filter out misjudgments caused by instantaneous interference, thereby improving the accuracy of short circuit type identification.

[0073] By distinguishing between true short circuits, capacitive load short circuits, and parallel short circuits, the adaptability of subsequent control strategies can be enhanced. For example, a true short circuit triggers immediate shutdown of the MOS transistor, a capacitive short circuit can attempt current limiting recovery, and a parallel short circuit requires adjusting the discharge strategy based on the SOC. These differentiated responses reduce the risk of false operation. Furthermore, internal pressure data can assist in determining the severity of the short circuit, providing a basis for tiered protection.

[0074] The internal pressure of the battery can be understood as the voltage across the battery, and the external pressure of the battery can be understood as the voltage from the discharge MOS transistor or the charge MOS transistor to the negative electrode of the battery.

[0075] In some optional embodiments, determining the short circuit type of the battery according to the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure includes:

[0076] When the external pressure of the battery is continuously lower than the first voltage threshold for a period exceeding a first predetermined period, the short circuit type is determined to be a true short circuit.

[0077] For example, in a specific implementation, the first voltage threshold may be set to 2V, and the first predetermined time duration may be 10s. It is understood that the first voltage threshold may be set to other reasonable values ​​as needed, such as 0.5V, 0.8V, 1V, 1.5V, etc. The first predetermined time duration may also be set to other values ​​as needed, such as 6s, 7s, 8s, 11s, 12s, etc.

[0078] Through the judgment logic that the external voltage is continuously lower than the threshold (such as 2V) and the duration meets the standard (such as 10s), the interference of capacitive short circuit and parallel short circuit can be effectively eliminated. Capacitive short circuit has the characteristic of short-term voltage drop, while parallel short circuit has the characteristic of voltage step recovery.

[0079] In some optional embodiments, the method further comprises:

[0080] When the short circuit type is determined to be a true short circuit, the control cuts off the current path.

[0081] Upon detecting a true short circuit, the current path is immediately cut off, preventing the risk of thermal runaway or arcing caused by sustained short-circuit current. Unlike current-limiting recovery strategies for capacitive or parallel short circuits, hard shutdown during a true short circuit completely eliminates the electrolytic damage posed by reverse voltage to the battery. Furthermore, the direct shutdown strategy reduces the repeated conduction losses of the MOS tube during a short circuit, lowering the probability of device failure.

[0082] In some optional embodiments, the current path includes a main discharge path and a current limiting path connected in parallel, the main discharge circuit is adapted to be cut off when the current of the battery exceeds a predetermined threshold, and the controlling of cutting off the current path includes:

[0083] The flow restriction passage is controlled to be cut off.

[0084] Specifically, due to the delay in determining the type of battery short circuit, a hierarchical shutdown mechanism can be employed: the main discharge path is first disconnected to block high currents, followed by the current limiting path to eliminate residual current paths, thus avoiding the arcing risk associated with traditional single-path shutdown. This dual-path structure ensures that if either path fails, protection can still be achieved through the other path, improving system fault tolerance. After the main path is disconnected, the resistance characteristics of the current limiting path suppress current surges, reducing the impact of current surges on the MOS transistor.

[0085] In addition, for transient faults such as capacitive short circuits, only the current limiting path can be cut off and the main path can be kept on standby, accelerating system restart.

[0086] In some optional implementations, after controlling to cut off the current path, the method further includes:

[0087] continuously monitoring at least one of an external voltage and a current of the battery;

[0088] When the external pressure of the battery recovers to the first voltage threshold, and / or the current of the battery reverses, the main discharge path is restored.

[0089] Continuously monitor the external pressure and current of the battery, and filter out transient interference such as voltage jitter through continuous monitoring to avoid invalid restarts. The current reversal criterion can identify the need for balanced charging between modules to avoid local overheating caused by forced shutdown. Compared with the traditional fixed delay recovery strategy, the dynamic criterion can shorten the recovery time, which is especially suitable for energy storage scenarios that require fast response. Dynamic feature matching, such as current reversal features (such as from -50A to +5A), can effectively identify the change in operating conditions of the battery from discharge state to charging state. The external pressure recovers to the threshold (such as 3.0V) combined with current reversal detection can eliminate false recovery signals and ensure that the path restart is triggered only for recoverable faults such as capacitive short circuit or parallel short circuit.

[0090] In some optional embodiments, the method further comprises:

[0091] When the external pressure of the battery returns to a second voltage threshold, the short circuit type is determined to be a parallel short circuit; wherein the second voltage threshold is greater than the first voltage threshold. For example, in some optional embodiments, determining that the external pressure of the battery returns to the second voltage threshold includes:

[0092] The external pressure of the battery is collected at predetermined time intervals. When the external pressure exceeds the second voltage threshold three times in a row, it is determined that the external pressure of the battery has recovered to the second voltage threshold.

[0093] This implementation method can achieve the following technical effects by introducing a second voltage threshold and a multi-cycle sampling verification mechanism. The accuracy of dynamic identification of short-circuit types is improved: the first threshold (such as 2.0V) is used for the initial judgment of true short circuits, and the second threshold (such as 3.2V) is dedicated to the confirmation of parallel short circuits. The short-circuit types are distinguished by the difference in voltage recovery gradients. If the true short-circuit voltage is continuously less than the first threshold, the parallel short circuit can be restored to the second threshold, avoiding misjudgments caused by traditional single thresholds. For example, when a capacitive short circuit recovers to the first threshold but does not reach the second threshold, it is mistakenly considered a parallel short circuit. Enhanced anti-interference: The judgment logic of sampling exceeding the second threshold for three consecutive times can filter out voltage oscillation noise and reduce the false alarm rate. Optimized system protection strategy: After the parallel short circuit is determined, the current limiting mode can be triggered instead of direct shutdown (true short circuit requires hard shutdown), reducing unnecessary shutdowns. In specific implementation, combined with current direction detection (such as parallel short circuits are often accompanied by current shunting), the reliability of type identification can be further improved.

[0094] In some optional embodiments, determining the short circuit type of the battery according to the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure includes:

[0095] When the external pressure of the battery recovers from being lower than the first voltage threshold to a predetermined normal voltage value within a second predetermined time period, it is determined that the short circuit type is a capacitive load short circuit.

[0096] For example, in some optional embodiments, when the external pressure of the battery recovers from below the first voltage threshold to 0.9 times the internal pressure of the battery within the second predetermined time period, the short circuit type is determined to be a capacitive load short circuit.

[0097] By analyzing the voltage's dynamic characteristics, the voltage self-recovery characteristic of capacitive load short circuits can be clearly distinguished from true short circuits (voltage remains continuously near 0V) and parallel short circuits (voltage fluctuates in steps). The second predetermined duration (e.g., 500ms) eliminates false recovery signals caused by transient interference such as vibration, reducing the false positive rate.

[0098] After the capacitive load is short-circuited, only current limiting is required instead of complete shutdown, thus reducing unnecessary downtime.

[0099] In some optional embodiments, the method further comprises:

[0100] After determining that the short circuit type is a capacitive load short circuit, the control restores the current path that was cut off when the battery current exceeds a predetermined threshold. This optimizes battery availability and immediately restarts the current path after the short circuit is confirmed, reducing downtime compared to traditional global shutdown solutions.

[0101] In some optional embodiments, determining the short circuit type of the battery according to the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure includes:

[0102] When the external pressure of the battery is greater than a first voltage threshold, it is determined that the short circuit type is a parallel short circuit.

[0103] Due to the current shunting characteristics of parallel short circuit, the external voltage is usually higher than that of metallic short circuit. The first voltage threshold can be used to quickly distinguish between the two types of short circuits.

[0104] In some optional embodiments, the method further comprises:

[0105] After determining that the short circuit type is a parallel short circuit, the battery is controlled to be connected to the circuit through the current limiting path. After the determination, current limiting is triggered instead of hard shutdown to avoid system downtime due to accidental disconnection.

[0106] In some optional embodiments, after controlling the battery to connect to the circuit through the current limiting path, the method further includes:

[0107] continuously monitoring at least one of an external voltage and a current of the battery;

[0108] When the external pressure of the battery recovers to the first voltage threshold, and / or the current of the battery reverses, the main discharge path of the battery is restored and the current limiting path is closed.

[0109] In this way, a dynamic recovery mechanism can be constructed: the main path is automatically switched when the external voltage recovers (for example, to 3.7V) or the current reverses, thereby reducing response delay.

[0110] In some optional implementations, when the current of the battery exceeds a predetermined threshold, obtaining the external pressure of the battery within a preset time period includes:

[0111] When the current of the battery exceeds a predetermined threshold, the control cuts off the current path of the battery;

[0112] After a first preset time delay, the external pressure of the battery is collected.

[0113] Delaying the first preset time, T1, helps distinguish short circuit types. True short circuits and capacitive short circuits have different voltage recovery characteristics after shutdown. For a true short circuit, the external voltage remains below the threshold with no recovery trend. For a capacitive short circuit, V1 returns to the normal range after T1. The T1 delay provides an observation window for voltage recovery.

[0114] Furthermore, delay T1 can eliminate transient interference during turn-off. For example, when a MOS transistor is turned off, voltage ringing and current tailing occur, causing fluctuations in the V1 sampling value. Delay T1 (usually 1 to 10 ms) allows for the gate charge to be fully released, ensuring stable voltage between the DS electrodes.

[0115] The present invention also discloses an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the battery short circuit monitoring method is implemented.

[0116] In a specific implementation, the electronic device may be a battery management system.

[0117] The present invention also discloses a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the battery short circuit monitoring method is implemented.

[0118] The present invention also discloses a computer program product, which includes computer instructions. When the computer instructions are executed, the battery short circuit monitoring method is implemented.

[0119] The present invention also discloses a battery device, comprising:

[0120] Batteries, and

[0121] The electronic device; or, the computer-readable storage medium, or, the computer program product.

[0122] The invention also discloses an electrical device comprising the battery device.

[0123] In the aforementioned battery short circuit monitoring method, electronic device, storage medium, program product, battery device, and electrical equipment, the battery short circuit monitoring method obtains the external pressure and internal pressure of the battery within a preset time period when the battery current exceeds a predetermined threshold, and determines the short circuit type of the battery based on the numerical relationship and dynamic change characteristics of the obtained external and internal pressures. By simultaneously monitoring the numerical relationship and dynamic change characteristics of the external and internal pressures, the different characteristics of true short circuits, capacitive short circuits, and parallel short circuits can be distinguished. The data acquisition window of the preset time period combined with the analysis of the numerical relationship can effectively filter out misjudgments caused by transient interference, thereby improving the accuracy of identifying the short circuit type and thus enhancing the adaptability of subsequent control strategies.

[0124] To facilitate an overall understanding of the concept of this application, an overall description is given below in conjunction with a detailed embodiment.

[0125] Ginseng Figures 1 to 3 As shown, the battery short circuit monitoring method specifically includes the following steps.

[0126] S10: After the battery is powered on, turn on the battery discharge MOS tube.

[0127] S20: Determine whether a notification is received from the hardware that the current exceeds the threshold IREF. If so, proceed to the next step; otherwise, terminate the diagnosis.

[0128] S30: Turn off the discharge MOS tube, turn off the current limiting MOS tube, and then delay for time T1 to collect the battery external pressure V1.

[0129] S40: Determine whether the external pressure V1 is greater than a preset voltage threshold VREF1. If so, diagnose it as a parallel short circuit. Otherwise, proceed to the next step.

[0130] S50: Turn on the current-limiting MOS transistor, delaying for the first time T2 and each subsequent time T3, and monitor the external pressure V1 and internal pressure V2 in real time. Determine whether the external pressure is less than 2V. If so, it is determined to be a true short circuit. Otherwise, proceed to the next step.

[0131] S60: Determine whether the external pressure of the battery is greater than 0.9 times the internal pressure V2. If so, determine that the load is short-circuited. Otherwise, proceed to the next step.

[0132] S70: Determine whether the total delay time is greater than 10s. If so, determine that it is a true short circuit. Otherwise, return to step S50 and repeat steps S50, S60, and S70.

[0133] S80: The above steps will eventually produce four results: 1. Short circuit protection is not triggered; 2. Parallel short circuit is triggered; 3. Battery true short circuit is triggered; 4. Battery load short circuit is triggered.

[0134] In the above stage, the role of the discharge MOS tube is equivalent to the switch of the current loop. After it is disconnected, it is equivalent to disconnecting the battery circuit. The role of the current limiting MOS tube is to limit the current in the current limiting circuit and limit it to a certain size to protect electronic components from being damaged by large current, but at the same time it does not completely cut off the discharge reflux.

[0135] The second stage: according to the three situations of triggering short circuit protection, perform corresponding processing operations

[0136] S1: The capacitive load is judged to be short-circuited, the discharge MOS tube is turned on, the current limiting MOS tube is turned off, and the system returns to normal.

[0137] S2: It is judged as a parallel short circuit, the current limiting MOS tube is turned on, and the discharge MOS tube is turned off.

[0138] S3: Detect the external pressure V1 once per second. If the external pressure V1 is greater than the voltage threshold VREF1, or the battery is in the charging state, jump to step S8, otherwise go to the next step.

[0139] S4: Determine whether the timing has exceeded 5 minutes since the first entry into step S3. If so, jump to step S8; otherwise, jump back to step S3.

[0140] S5: It is determined to be a true short circuit, and the current limiting MOS tube and the discharge MOS tube are turned off.

[0141] S6: Detect the external pressure V1 once per second. If the external pressure V1 is detected to be greater than the preset threshold VREF2 for three consecutive times, jump to S2, otherwise go to the next step.

[0142] S7: Determine whether the external pressure V1 is greater than a preset threshold VREF1, or the battery is in a charging state, then jump to step S8, otherwise jump back to step S6.

[0143] S8: Turn on the discharge MOS tube and turn off the current limiting MOS tube, and the system returns to normal.

[0144] In the two stages described above, by properly utilizing the current-limiting MOSFET, when short-circuit protection is triggered, the current-limiting MOSFET is turned on and the discharge MOSFET is turned off. This effectively limits the current in the current loop and prevents damage from a true battery short circuit. However, unlike existing technologies that directly and completely shut off the current loop, the use of the current-limiting MOSFET does not completely shut off the battery circuit. Combined with voltage detection, the cause of the short-circuit protection can be diagnosed, allowing for the execution of different actions, ultimately achieving a safe, accurate, and rapid system recovery.

[0145] It is understandable that the electronic device, storage medium, program product, battery device and power-consuming device disclosed in the present invention inherit all the improvements and advantages of the battery short circuit monitoring method, so they will not be discussed in detail here.

[0146] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0147] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A battery short circuit monitoring method, characterized in that: include: When the current of the battery exceeds a predetermined threshold, obtaining the external pressure and internal pressure of the battery within a preset time period; The short circuit type of the battery is determined based on the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure; the short circuit types include true short circuit, capacitive load short circuit, and parallel short circuit.

2. The battery short circuit monitoring method according to claim 1, characterized in that: The determining the short circuit type of the battery according to the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure includes: When the external pressure of the battery is continuously lower than the first voltage threshold for a period exceeding a first predetermined period, the short circuit type is determined to be a true short circuit.

3. The battery short circuit monitoring method according to claim 1 or 2, characterized in that: The method further comprises: When the short circuit type is determined to be a true short circuit, the control cuts off the current path.

4. The battery short circuit monitoring method according to claim 3, characterized in that: The current path includes a main discharge path and a current limiting path connected in parallel. The main discharge circuit is adapted to be cut off when the current of the battery exceeds a predetermined threshold. The control of cutting off the current path includes: The flow restriction passage is controlled to be cut off.

5. The battery short circuit monitoring method according to claim 4, characterized in that: After the controlling cuts off the current path, the method further includes: continuously monitoring at least one of an external voltage and a current of the battery; When the external pressure of the battery recovers to the first voltage threshold, and / or the current of the battery reverses, the main discharge path is restored.

6. The battery short circuit monitoring method according to claim 5, characterized in that: The method further comprises: When the external pressure of the battery recovers to a second voltage threshold, it is determined that the short circuit type is converted to a parallel short circuit; wherein the second voltage threshold is greater than the first voltage threshold.

7. The battery short circuit monitoring method according to claim 5, characterized in that: Determining whether the external pressure of the battery has recovered to the second voltage threshold includes: The external pressure of the battery is collected at predetermined time intervals. When the external pressure exceeds the second voltage threshold three times in a row, it is determined that the external pressure of the battery has recovered to the second voltage threshold.

8. The battery short circuit monitoring method according to claim 2, characterized in that: The first voltage threshold is 2V, and the first predetermined time is 10s.

9. The battery short circuit monitoring method according to claim 1, characterized in that: The determining the short circuit type of the battery according to the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure includes: When the external pressure of the battery recovers from being lower than the first voltage threshold to a predetermined normal voltage value within a second predetermined time period, it is determined that the short circuit type is a capacitive load short circuit.

10. The battery short circuit monitoring method according to claim 9, characterized in that: When the external pressure of the battery recovers from being lower than the first voltage threshold to 0.9 times the internal pressure of the battery within the second predetermined time period, it is determined that the short circuit type is a capacitive load short circuit.

11. The battery short circuit monitoring method according to claim 9 or 10, characterized in that: The method further comprises: After determining that the short circuit type is a capacitive load short circuit, the current path that is cut off when the current of the battery exceeds a predetermined threshold is controlled to be restored.

12. The battery short circuit monitoring method according to claim 1, characterized in that: The determining the short circuit type of the battery according to the acquired numerical relationship and dynamic change characteristics of the external pressure and the internal pressure includes: When the external pressure of the battery is greater than a first voltage threshold, it is determined that the short circuit type is a parallel short circuit.

13. The battery short circuit monitoring method according to claim 12, characterized in that: The method further comprises: After determining that the short circuit type is a parallel short circuit, the battery is controlled to be connected to the circuit through the current limiting path.

14. The battery short circuit monitoring method according to claim 12, characterized in that: After controlling the battery to be connected to the circuit through the current limiting path, the method further includes: continuously monitoring at least one of an external voltage and a current of the battery; When the external pressure of the battery recovers to the first voltage threshold, and / or the current of the battery reverses, the main discharge path of the battery is restored and the current limiting path is closed.

15. The battery short circuit monitoring method according to claim 1, characterized in that: When the current of the battery exceeds a predetermined threshold, obtaining the external pressure of the battery within a preset time period includes: When the current of the battery exceeds a predetermined threshold, the control cuts off the current path of the battery; After a first preset time delay, the external pressure of the battery is collected.

16. An electronic device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the battery short circuit monitoring method according to any one of claims 1 to 15 when executing the computer program.

17. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the battery short circuit monitoring method according to any one of claims 1 to 15 is implemented.

18. A computer program product comprising computer instructions, characterized in that: When the computer instructions are executed, the battery short circuit monitoring method according to any one of claims 1 to 15 is implemented.

19. A battery device, characterized in that: include: Batteries, and The electronic device according to claim 16; or, the computer-readable storage medium of claim 17, or, the computer program product of claim 18.

20. An electrical device, characterized in that: Comprising the battery device of claim 19.

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