Battery management method and battery pack

Abstract

The embodiment of the invention provides a battery management method and a battery pack, and relates to the technical field of batteries. The battery pack comprises a battery module, a first sensor module, a main control module and a second sensor module. The first sensor module is used for collecting vibration information received by the battery pack and outputting a corresponding vibration signal; the main control module is used for determining the vibration intensity grade of the battery pack based on the vibration signal; the main control module is also used for starting a battery protection mechanism and acquiring battery cell state information of the battery module acquired by the second sensor module under the condition that the vibration strength grade is the first grade; and under the condition that the battery protection mechanism is started, the main control module is also used for determining whether to quit the battery protection mechanism based on the battery cell state information and the vibration signal. When the battery pack is strongly vibrated or collided, a safety protection mechanism can be provided for the battery pack, and the safety of the battery pack is improved.

Description

Battery management method and battery pack Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery management method and a battery pack. Background Art

[0002] A battery management system (BMS) is primarily designed to intelligently manage and maintain individual battery cells, preventing overcharging and over-discharging, extending battery life, and monitoring battery status. Existing BMSs lack safety mechanisms for battery packs subjected to significant vibration or impact, such as disconnecting the power and charging paths to ensure safety.

[0003] Summary of the Invention

[0004] In view of this, it is necessary to provide a battery management method to solve the problem in the prior art that a safety protection mechanism cannot be provided for the battery pack when the battery pack is subjected to strong vibration or collision.

[0005] A first aspect of an embodiment of the present application discloses a battery management method, which is applied to a battery pack, wherein the battery pack includes a battery module, a battery management system BMS and a first sensor module, and the BMS includes a main control module and a second sensor module. The method includes: using the first sensor module to collect vibration information of the battery pack, and outputting a corresponding vibration signal to the main control module based on the collected vibration information; the main control module determines the vibration intensity level of the battery pack based on the vibration signal; if the vibration intensity level is the first level, the main control module starts a battery protection mechanism and obtains the battery cell status information of the battery module collected by the second sensor module, the battery protection mechanism includes disconnecting the power supply path of the battery module; when the battery protection mechanism is started, the main control module determines whether to exit the battery protection mechanism based on the battery cell status information and the vibration signal.

[0006] The above-mentioned battery management method directly activates the battery protection mechanism to ensure the safety of the battery pack when it determines that the battery pack is currently subjected to strong vibration or collision, and then collects the battery cell status information. Based on the battery cell status information and the subsequent vibration conditions suffered by the battery pack, it determines whether to release the battery protection mechanism, which can improve the safety of the battery pack.

[0007] In some possible implementations, the battery cell status information includes the battery cell voltage and the battery cell temperature, and the main control module determines whether to exit the battery protection mechanism based on the battery cell status information and the vibration signal, including: if the battery cell voltage and the battery cell temperature are both within the corresponding safety threshold range, and the vibration intensity level changes from the first level to the third level, and continues at the third level for a first preset time, the main control module exits the battery protection mechanism, and the vibration intensity of the first level is greater than the vibration intensity of the third level.

[0008] In some possible implementations, if the main control module is in a dormant state before receiving the vibration signal, the main control module exits the battery protection mechanism, including: the main control module exits the battery protection mechanism and re-enters the dormant state.

[0009] In some possible implementations, if the main control module is in a charging management state before receiving the vibration signal, the battery protection mechanism also includes disconnecting the charging path of the battery module, and the main control module exits the battery protection mechanism, including: the main control module exits the battery protection mechanism and re-enters the charging management state.

[0010] In some possible implementations, after the main control module determines the vibration intensity level to which the battery pack is subjected based on the vibration signal, it further includes: if the vibration intensity level is the third level, the main control module does not activate the battery protection mechanism, and the first level of vibration intensity is greater than the third level of vibration intensity.

[0011] In some possible implementations, the method further includes: within a second preset time when the vibration intensity level is determined to be the third level, if the vibration intensity level changes from the third level to the second level or the first level, the main control module activates the battery protection mechanism and obtains the battery cell status information of the battery module collected by the second sensor module, the vibration intensity of the second level is greater than the vibration intensity of the third level and less than the vibration intensity of the first level.

[0012] In some possible implementations, if the BMS is in a dormant state before receiving the vibration signal, if the vibration intensity level is the third level, the main control module does not start the battery protection mechanism, including: if the vibration intensity level is the third level, the main control module does not start the battery protection mechanism and does not wake up the second sensor module.

[0013] In some possible implementations, after the main control module determines the vibration intensity level to which the battery pack is subjected based on the vibration signal, it further includes: if the vibration intensity level is the second level, the main control module obtains the battery cell status information of the battery module collected by the second sensor module, and the vibration intensity of the first level is greater than the vibration intensity of the second level; the main control module determines whether to start the battery protection mechanism based on the battery cell status information.

[0014] In some possible implementations, the battery cell status information includes the battery cell voltage and the battery cell temperature, and the main control module determines whether to start the battery protection mechanism based on the battery cell status information, including: if the battery cell voltage or the battery cell temperature is not within the corresponding safety threshold range, the main control module starts the battery protection mechanism.

[0015] In a second aspect, an embodiment of the present application provides a battery pack, which includes a battery module, a battery management system BMS and a first sensor module, the BMS including a main control module and a second sensor module, the first sensor module being used to collect vibration information received by the battery pack, and output a corresponding vibration signal to the main control module based on the collected vibration information; the main control module is used to determine the vibration intensity level received by the battery pack based on the vibration signal; the main control module is also used to start a battery protection mechanism when the vibration intensity level is the first level, and obtain the battery cell status information of the battery module collected by the second sensor module, the battery protection mechanism including disconnecting the power supply path of the battery module; when the battery protection mechanism is started, the main control module is also used to determine whether to exit the battery protection mechanism based on the battery cell status information and the vibration signal.

[0016] It can be understood that the battery pack described in the second aspect provided above corresponds to the method of the first aspect provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of a module of a battery pack provided in one embodiment of the present application;

[0018] FIG2 is a schematic diagram of the circuit structure of a battery pack provided in one embodiment of the present application;

[0019] FIG3 is a flow chart of a battery management method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] It should be noted that in this application, "at least one" means one or more, and "more than one" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0021] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0022] It is understood that the connection relationships described in this application refer to direct or indirect connections. For example, the connection between A and B can be either a direct connection between A and B or an indirect connection between A and B via one or more other electrical components. For example, A and C can be directly connected, and C can be directly connected to B, so that A and B are connected through C. It is also understood that the description of "A connecting to B" in this application can be a direct connection between A and B or an indirect connection between A and B via one or more other electrical components.

[0023] The technical solution of the present application is further described in detail below with reference to the accompanying drawings.

[0024] Please refer to Figure 1, which shows a battery pack 100 provided in one embodiment of the present application. The battery pack 100 can be integrated into an electrical device, for example, an electric vehicle, a robot, a lighting device, etc. The battery pack 100 includes a battery module 10, a battery management system (BMS) 20 and a first sensor module 30. The BMS 20 includes a main control module 201 and a second sensor module 202. The battery module 10 may include one or more batteries. The multiple batteries may be connected in series, in parallel, or in a combination of series and parallel. This embodiment of the present application is not limited to this. The batteries in the battery module 10 may be lithium batteries, or other types of batteries.

[0025] The first sensor module 30 is used to collect vibration information of the battery pack 100 and output a corresponding vibration signal based on the collected vibration information to the main control module 201. The vibration information can be caused by earthquakes, battery packs being towed or transported, collisions, etc.

[0026] In some embodiments, outputting a corresponding vibration signal based on the collected vibration information may refer to outputting vibration signals of different magnitudes based on the collected vibration information of different intensities, for example, vibration signals of different voltage magnitudes or vibration signals of different current magnitudes. The first sensor module 30 may include a gyroscope and an accelerometer. The first sensor module 30 may be disposed on the surface of the battery pack 100. It is understood that in order to improve the accuracy of vibration detection, the battery pack 100 may be provided with multiple first sensor modules 30.

[0027] The second sensor module 202 is used to collect cell status information of the battery module 10. The cell status information may include cell voltage, cell temperature, etc. The second sensor module 202 may be disposed adjacent to the cells in the battery module 10.

[0028] In some embodiments, the cell status information may also include the cell current. The second sensor module 202 may also refer to an analog front end (AFE) integrated in an existing battery pack. The main control module 201 may include a microcontroller (MCU), a single-chip microcomputer, or a chip with data processing and function control.

[0029] The main control module 201 is used to determine the vibration intensity level to which the battery pack 100 is subjected based on the received vibration signal. The vibration intensity level can be divided according to actual needs, and the embodiments of the present application are not limited to this. Different vibration intensity levels can correspond to vibration signals of different interval sizes (voltage interval or current interval). For example, the vibration intensity level includes three levels, the first level is the highest (for example, representing strong vibration or collision), the second level is the second (for example, representing medium vibration), and the third level is the lowest (for example, representing slight vibration), that is, the vibration intensity of the first level is greater than the vibration intensity of the second level, and the vibration intensity of the second level is greater than the vibration intensity of the third level.

[0030] In some embodiments, if the main control module 201 is in a dormant state before receiving the vibration signal, the main control module 201 may be awakened upon receiving the vibration signal and may determine the vibration intensity level received by the battery pack 100 based on the received vibration signal.

[0031] The main control module 201 is also used to activate the battery protection mechanism and obtain the cell status information of the battery module 10 collected by the second sensor module 202 when it is determined that the vibration intensity level is the first level. The battery protection mechanism may include disconnecting the power supply path (discharge path) of the battery module 10 to ensure the safety of the battery pack 100. If the battery module 10 is in a charging state, the battery protection mechanism may also include disconnecting the charging path of the battery module 10 to ensure the safety of the battery pack 100. If the second sensor module 202 is in a dormant state, the main control module 201 may also wake up the second sensor module 202 to collect the cell status information after activating the battery protection mechanism, and then obtain the cell status information of the battery module 10 collected by the second sensor module 202.

[0032] Since the vibration experienced by the battery pack 100 generally does not last forever and may disappear after a period of time, when the vibration disappears or weakens and there is no abnormality in the battery pack 100, the battery pack 100 can also exit the battery protection mechanism so that the battery pack 100 can operate normally or re-enter the standby state. Specifically, when the battery protection mechanism is activated, the main control module 201 is also used to determine whether to exit the battery protection mechanism based on the battery cell status information and the vibration signal.

[0033] That is, when the main control module 201 determines that the battery pack 100 is currently subjected to strong vibration or collision, it directly activates the battery protection mechanism to ensure the safety of the battery pack 100, and then collects the battery cell status information, and determines whether to release the battery protection mechanism based on the battery cell status information and the subsequent vibration conditions suffered by the battery pack 100.

[0034] In some embodiments, for an electrical device, if the electrical device is non-mobile, the battery protection mechanism can be activated in response to a received vibration signal when the battery pack 100 is in a charging state, a discharging state, or a dormant state. If the electrical device is mobile (for example, the electrical device is an electric vehicle), in order to avoid sudden power outage affecting the safety of the device user, the battery protection mechanism can be activated in response to a received vibration signal when the battery pack 100 is in a charging state or a dormant state (the electrical device is generally stationary in the charging state or dormant state).

[0035] Taking the battery cell status information including the battery cell voltage and battery cell temperature as an example, after the main control module 201 activates the battery protection mechanism, if the battery cell voltage and the battery cell temperature are both within the corresponding safety threshold range (indicating that the previous vibration did not cause an abnormality inside the battery cell), and the vibration intensity level changes from the first level to the third level, and continues at the third level for a first preset time (indicating that the vibration has weakened to a safe range or the vibration disappears), the main control module 201 exits the battery protection mechanism. The main control module 201 exiting the battery protection mechanism may refer to the main control module 201 restoring the power supply path of the battery module 10. If the battery module 10 is in a charging state before the battery protection mechanism is activated, exiting the battery protection mechanism may also include the main control module 201 restoring the charging path of the battery module 10 so that the battery pack 100 can continue to charge. The first preset time can be set according to actual needs, and the embodiment of the present application is not limited to this. For example, the first preset time may be 10 minutes.

[0036] In some embodiments, if the main control module 201 is in a dormant state before receiving the vibration signal, the main control module 201 exiting the battery protection mechanism may include: the main control module 201 exiting the battery protection mechanism and re-entering the dormant state to save battery pack power. If the main control module 201 is in a charging management state before receiving the vibration signal (i.e., the battery pack 100 is in a charging state before the battery protection mechanism is activated), the main control module 201 exiting the battery protection mechanism may include: the main control module 201 exiting the battery protection mechanism and re-entering the charging management state to continue charging management of the battery module 10 to ensure charging safety of the battery pack 100.

[0037] In some embodiments, if the vibration intensity level is the second level, the main control module 201 obtains the cell status information of the battery module 10 collected by the second sensor module 202, and determines whether to start the battery protection mechanism based on the cell status information. For example, if the cell voltage and / or cell temperature are not within the corresponding safety threshold range, the main control module 201 starts the battery protection mechanism. That is, when the main control module 201 determines that the battery pack 100 is currently subjected to moderate vibration, it collects the cell status information, determines whether the vibration has caused harm to the cell based on the cell status information, and then decides whether to start the battery protection mechanism. If the cell voltage and / or cell temperature are both within the corresponding safety threshold range, indicating that the vibration has not caused harm to the cell, the main control module 201 does not start the battery protection mechanism.

[0038] In some embodiments, if the main control module 201 is in a dormant state before receiving the vibration signal, when the battery pack is subjected to the second level of vibration, the main control module 201 may be awakened. After being awakened, the main control module 201 may continue to awaken the second sensor module 202. The main control module 201 obtains the cell status information of the battery module 10 collected by the second sensor module 202 and determines whether to activate the battery protection mechanism based on the cell status information. If the main control module 201 is in a charge management state before receiving the vibration signal, that is, both the main control module 201 and the second sensor module 202 are in an active state, when the battery pack is subjected to the second level of vibration, the main control module 201 may determine whether to activate the battery protection mechanism based on the cell status information collected by the second sensor module 202.

[0039] In some embodiments, if the vibration intensity level is the third level, the main control module 201 does not activate the battery protection mechanism. That is, when the main control module 201 determines that the battery pack 100 is currently experiencing a slight vibration, the main control module 201 does not activate the battery protection mechanism because slight vibrations generally do not cause harm to the battery cells.

[0040] In some embodiments, if the main control module 201 is in a dormant state before receiving the vibration signal, it may be awakened when the battery pack is subjected to the third level of vibration. After awakening, the main control module 201 does not activate the battery protection mechanism and does not wake up the second sensor module 202. The main control module 201 may re-enter the dormant state to conserve battery pack power. That is, the main control module 201 re-enters the dormant state after determining that the battery pack has been subjected to the third level of vibration. If the main control module 201 is in a charge management state before receiving the vibration signal, that is, both the main control module 201 and the second sensor module 202 are in an active state, when the battery pack is subjected to the third level of vibration, the main control module 201 does not activate the battery protection mechanism and continues to manage the charge of the battery module 10.

[0041] In some embodiments, when the battery pack 100 is subjected to the third level of vibration, the main control module 201 can be configured not to wake up. That is, the vibration signal corresponding to the third level of vibration cannot wake up the main control module 201. For example, the wake-up pin of the main control module 201 must only wake up when the voltage of the received vibration signal is greater than a preset voltage. The voltage of the vibration signal corresponding to the third level of vibration is less than the preset voltage, while the voltage of the vibration signal corresponding to the first and second levels of vibration is greater than the preset voltage.

[0042] In some embodiments, within the second preset time period after the vibration intensity level is determined to be the third level, if the vibration intensity level changes from the third level to the second level or the first level, the main control module 201 directly activates the battery protection mechanism. The main control module 201 may also obtain the cell status information of the battery module 10 collected by the second sensor module 202 to determine whether to exit the battery protection mechanism based on the cell status information and the vibration signal. In other words, when the vibration intensity is detected to be from mild to moderate or strong, the battery protection mechanism can be activated early to ensure the safety of the battery pack, and then based on the cell status information and the subsequent vibration conditions to which the battery pack 100 is subjected, it is determined whether to terminate the battery protection mechanism.

[0043] Please refer to Figure 2, which is a schematic diagram of the circuit architecture of a battery pack 100 according to one embodiment of the present application. The battery pack 100 includes a battery module 10, a first sensor module 30, a main control module 201, a second sensor module 202, a battery main positive switch 40, a battery main negative switch 50, a charging main positive switch 60, and a charging main negative switch 70. The battery main positive switch 40 and the battery main negative switch 50 are used to control the power supply path of the battery module 10, while the charging main positive switch 60 and the charging main negative switch 70 are used to control the charging path of the battery module 10.

[0044] In some embodiments, the battery module 10 may include one or more battery cells, the first sensor module 30 may include an accelerometer and a gyroscope, the second sensor module 202 may be an AFE module, the main control module 201 may include an MCU, and the battery main positive switch 40, the battery main negative switch 50, the charging main positive switch 60, and the charging main negative switch 70 may include switching elements such as transistors or metal oxide semiconductor field effect transistors (MOS transistors). The second sensor module 202 may be located adjacent to the battery module 10.

[0045] The main control module 201 is electrically connected to the first sensor module 30, the second sensor module 202, the battery main positive switch 40, the battery main negative switch 50, the charging main positive switch 60, and the charging main negative switch 70. The second sensor module 202 is electrically connected to the battery module 10. The battery module 10 is also electrically connected to the battery main positive switch 40, the battery main negative switch 50, the charging main positive switch 60, and the charging main negative switch 70.

[0046] The main control module 201 can control the on and off of the battery main positive switch 40, the battery main negative switch 50, the charging main positive switch 60, and the charging main negative switch 70 to activate or deactivate the battery protection mechanism. For example, if the main control module 201 is in a dormant state before receiving the vibration signal, and the battery pack 100 is not currently charging, the charging main positive switch 60 and the charging main negative switch 70 are in the off state, then activating the battery protection mechanism by the main control module 201 may mean that the main control module 201 controls the battery main positive switch 40 and the battery main negative switch 50 to be off; and deactivating the battery protection mechanism by the main control module 201 may mean that the main control module 201 controls the battery main positive switch 40 and the battery main negative switch 50 to be closed.

[0047] For example, if the main control module 201 is in the charging management state before receiving the vibration signal, since the battery pack 100 is currently in the charging state, the charging main positive switch 60 and the charging main negative switch 70 are in the closed state, the main control module 201 starting the battery protection mechanism may mean: the main control module 201 controls the battery main positive switch 40 and the battery main negative switch 50 to be disconnected, and controls the charging main positive switch 60 and the charging main negative switch 70 to be disconnected; the main control module 201 releasing the battery protection mechanism may mean: the main control module 201 controls the battery main positive switch 40 and the battery main negative switch 50 to be closed, and controls the charging main positive switch 60 and the charging main negative switch 70 to be closed.

[0048] FIG3 is a flowchart of a battery management method according to an embodiment of the present application. The method can be applied to a battery pack 100, which includes a battery module 10, a first sensor module 30, a main control module 201, and a second sensor module 202. The battery management method includes:

[0049] S301 : Utilize the first sensor module 30 to collect vibration information received by the battery pack 100 , and output a corresponding vibration signal to the main control module 201 based on the collected vibration information.

[0050] In some embodiments, the first sensor module 30 may include a gyroscope and an acceleration sensor, and may collect vibration information of the battery pack 100 through the gyroscope and the acceleration sensor, and may output vibration signals of different sizes based on different levels of vibration information.

[0051] S302 : The main control module 201 determines the vibration intensity level to which the battery pack 100 is subjected based on the vibration signal.

[0052] For example, the vibration intensity level includes three levels. The first level of vibration intensity is greater than the second level of vibration intensity, and the second level of vibration intensity is greater than the third level of vibration intensity.

[0053] S303 , if the vibration intensity level is the first level, the main control module 201 activates the battery protection mechanism and obtains the cell status information of the battery module 10 collected by the second sensor module 202 .

[0054] S304 , if the vibration intensity level is the second level, the main control module 201 obtains the cell status information of the battery module 10 collected by the second sensor module 202 , and determines whether to start the battery protection mechanism based on the cell status information.

[0055] S305: If the vibration intensity level is the third level, the main control module 201 does not activate the battery protection mechanism.

[0056] S306 , when the battery protection mechanism is activated, the main control module 201 determines whether to exit the battery protection mechanism based on the battery cell status information and the vibration signal.

[0057] The above-mentioned battery management method and battery pack can distinguish different vibration levels such as slight, medium and strong. If the BMS is in sleep mode, when a slight vibration occurs, the BMS is awakened, but it does not need to collect information such as the cell voltage and temperature, and the battery protection mechanism is not activated. When a medium-intensity vibration occurs, the BMS is awakened, and then starts to collect information such as the cell voltage and temperature, and determines whether it causes harm to the battery pack, and then decides whether to activate the battery protection mechanism. When a strong vibration or collision occurs, the BMS is awakened, and the battery protection mechanism is directly activated, and then the cell voltage, temperature and other information are collected, and then it is determined whether to release the battery protection mechanism. If the BMS is in charging state, due to the BM S is already constantly monitoring the cell voltage, temperature and other information. When a slight vibration occurs, it can continuously observe and detect whether the vibration is getting stronger. If the vibration intensity changes from slight to medium or strong, it can activate the battery protection mechanism early and stop charging. After the vibration becomes smaller or disappears, the battery protection mechanism can be released and the charging process can be restarted. When a medium-intensity vibration occurs, it can be based on the collected cell voltage, temperature and other information to determine whether it causes harm to the battery pack, and then decide whether to activate the battery protection mechanism. When a strong vibration occurs, the battery protection mechanism can be activated immediately. When the vibration decreases or disappears, it can be determined whether there is any abnormality in the cell voltage, temperature, etc., and then decide whether to restart the charging process.

[0058] For those skilled in the art, other corresponding changes or adjustments can be made according to the application scheme and application concept of this application in combination with the actual needs of production, and these changes and adjustments should fall within the scope disclosed in this application.

Claims

1. A battery management method, applied to a battery pack, characterized in that: The battery pack includes a battery module, a battery management system BMS and a first sensor module, the BMS includes a main control module and a second sensor module, and the method includes: Using the first sensor module to collect vibration information received by the battery pack, and outputting a corresponding vibration signal to the main control module based on the collected vibration information; The main control module determines the vibration intensity level to which the battery pack is subjected based on the vibration signal; If the vibration intensity level is the first level, the main control module starts a battery protection mechanism and obtains the cell status information of the battery module collected by the second sensor module, wherein the battery protection mechanism includes disconnecting a power supply path of the battery module; When the battery protection mechanism is activated, the main control module determines whether to exit the battery protection mechanism based on the battery cell status information and the vibration signal.

2. The battery management method according to claim 1, characterized in that: The cell status information includes the cell voltage and the cell temperature, and the main control module determines whether to exit the battery protection mechanism based on the cell status information and the vibration signal, including: If the battery cell voltage and the battery cell temperature are both within the corresponding safety threshold range, and the vibration intensity level changes from the first level to the third level, and persists at the third level for a first preset time, the main control module exits the battery protection mechanism, and the vibration intensity of the first level is greater than the vibration intensity of the third level.

3. The battery management method according to claim 2, characterized in that: If the main control module is in a dormant state before receiving the vibration signal, the main control module exits the battery protection mechanism, including: The main control module exits the battery protection mechanism and re-enters the sleep state.

4. The battery management method according to claim 2, characterized in that: If the main control module is in a charging management state before receiving the vibration signal, the battery protection mechanism further includes disconnecting the charging path of the battery module, and the main control module exits the battery protection mechanism, including: The main control module exits the battery protection mechanism and re-enters the charging management state.

5. The battery management method according to claim 1, characterized in that: After the main control module determines the vibration intensity level to which the battery pack is subjected based on the vibration signal, the main control module further includes: If the vibration intensity level is the third level, the main control module does not start the battery protection mechanism, and the vibration intensity of the first level is greater than the vibration intensity of the third level.

6. The battery management method according to claim 5, characterized in that: The method further comprises: Within the second preset time of determining that the vibration intensity level is the third level, if the vibration intensity level changes from the third level to the second level or the first level, the main control module activates the battery protection mechanism and obtains the battery cell status information of the battery module collected by the second sensor module, and the vibration intensity of the second level is greater than the vibration intensity of the third level and less than the vibration intensity of the first level.

7. The battery management method according to claim 5, characterized in that: If the BMS is in a dormant state before receiving the vibration signal, if the vibration intensity level is the third level, the main control module does not start the battery protection mechanism, including: If the vibration intensity level is the third level, the main control module does not activate the battery protection mechanism and does not wake up the second sensor module.

8. The battery management method according to claim 1, characterized in that: After the main control module determines the vibration intensity level to which the battery pack is subjected based on the vibration signal, the main control module further includes: If the vibration intensity level is the second level, the main control module obtains the cell status information of the battery module collected by the second sensor module, and the vibration intensity of the first level is greater than the vibration intensity of the second level; The main control module determines whether to start the battery protection mechanism based on the battery cell status information.

9. The battery management method according to claim 8, characterized in that: The cell status information includes the cell voltage and the cell temperature. The main control module determines whether to start the battery protection mechanism based on the cell status information, including: If the battery cell voltage or the battery cell temperature is not within the corresponding safety threshold range, the main control module activates the battery protection mechanism.

10. A battery pack, characterized in that: The battery pack includes a battery module, a battery management system BMS and a first sensor module. The BMS includes a main control module and a second sensor module. The first sensor module is used to collect vibration information of the battery pack, and output a corresponding vibration signal to the main control module based on the collected vibration information; The main control module is used to determine the vibration intensity level to which the battery pack is subjected based on the vibration signal; The main control module is further used to start a battery protection mechanism and obtain the battery cell status information of the battery module collected by the second sensor module when the vibration intensity level is the first level, wherein the battery protection mechanism includes disconnecting the power supply path of the battery module; When the battery protection mechanism is activated, the main control module is further configured to determine whether to exit the battery protection mechanism based on the battery cell status information and the vibration signal.

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