Battery management system and electronic equipment

Abstract

The invention provides a battery management system and an electronic device, the battery management system comprises a control module, the control module is used for controlling device function states, the device function states comprise a sleep mode, a normal mode and a power-down mode, and the power-down mode is added on the basis of an original mode. The mode number of the device function state is enriched, and therefore the technical problem that the mode number of the device function state is small is solved; and the newly added power-down mode can be mutually switched with the original mode under the triggering of the corresponding condition, so that the organic fusion among the modes of the function state of the equipment is realized, and the method and the device can be suitable for more application scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery management system and electronic equipment. Background Art

[0002] The battery management system in the related art has limited device functional states that can be implemented.

[0003] However, as more application requirements emerge, these limited device functional states cannot meet new requirements. Summary of the invention

[0004] Embodiments of the present invention provide a battery management system and an electronic device, which can improve the technical problem that the number of modes of the functional state of the device is small.

[0005] In a first aspect, an embodiment of the present invention provides a battery management system, which includes a control module, which is used to control the functional state of the device, and the functional state of the device includes a sleep mode, a normal mode and a power-off mode; wherein, under a first condition, the control module is used to control the functional state of the device to switch from the normal mode to the power-off mode; under a second condition, the control module is used to control the functional state of the device to switch from the power-off mode to the sleep mode.

[0006] In one embodiment, the control module includes a first control module and a second control module, the first control module is connected to the second control module, and the second control module is used to control the functional status of the device; the first condition is a watchdog failure, and in response to the watchdog failure, at least one of the first control module and the second control module obtains fault information of the battery management system, and saves the fault information through the second control module.

[0007] In one embodiment, the control module includes a first control module and a second control module, and the first condition is an oscillator failure of the second control module, a main oscillator failure of the second control module, or a thermal shutdown, wherein the oscillator failure includes a main oscillator failure integrated in the second control module and / or a backup oscillator failure integrated in the second control module.

[0008] In one embodiment, the control module includes a first control module and a second control module, and the second condition is that the effective duration of the watchdog is greater than or equal to a preset duration, and the preset duration is the switching duration from the power-down mode to the sleep mode; or, the second condition is that the backup oscillator integrated in the second control module fails and / or the external crystal oscillator connected to the second control module fails.

[0009] In one embodiment, the control module includes a first control module and a second control module, and the device functional state also includes a power-off mode and a standby mode. In response to the invalidation of the internal power-on reset, the second control module is used to control the device functional state to switch from sleep mode, normal mode, standby mode or power-off mode to power-off mode.

[0010] In one embodiment, the control module includes a first control module and a second control module, and the device functional state also includes a power-off mode and a standby mode. In response to the validity of the internal power-on reset, the second control module is used to control the device functional state to switch from the power-off mode to the sleep mode; in response to the failure of the backup oscillator of the second control module and / or the failure of the external crystal oscillator connected to the second control module, the second control module is used to control the device functional state to switch from the standby mode to the sleep mode; in response to the validity of the ignition wake-up or the validity of the hard-line wake-up, the second control module is used to control the device functional state to switch from the sleep mode to the normal mode; in response to the invalidity of the ignition wake-up and the request command to enter the standby mode, the second control module is used to control the device functional state to switch from the normal mode to the standby mode.

[0011] In one embodiment, the control module includes a first control module and a second control module. In response to an invalid ignition wake-up and a request command to enter a sleep mode or in response to a failure of a backup oscillator of the second control module, the second control module is used to control the device functional state to switch from a normal mode to a sleep mode.

[0012] In one embodiment, the control module includes a first control module and a second control module, and the device functional state also includes a standby mode. Under a third condition, the second control module is used to control the device functional state to switch from the standby mode to the normal mode. The third condition is that the ignition wake-up is valid, the hard line wake-up is valid, the cycle fault detection request signal is valid, the active diagnosis fault detection request signal is valid, the short circuit detection request signal is valid, the timing wake-up signal is valid, the charge and discharge wake-up signal is valid, the battery deep undervoltage detection request signal is valid, or the overflow time threshold is exceeded.

[0013] In a second aspect, an embodiment of the present invention provides an electronic device, which includes the above-mentioned battery management system.

[0014] In one embodiment, the control module includes a first control module and a second control module, the first control module is connected to the second control module, and the second control module is used to control the functional status of the device; the battery management system also includes a charging current limiting module, the input end of the charging current limiting module is connected to the first connection end, the first output end of the charging current limiting module is configured to be connected to the battery pack, and the second output end of the charging current limiting module is connected to the first control module.

[0015] In one embodiment, the battery management system also includes a first connector, a communication module, a first diode and a second diode, the first connector is connected to the first control module; the communication module is connected between the first control module and the first connector; the positive pole of the first diode is connected to the communication module, and the negative pole of the first diode is connected to the second control module; the positive pole of the second diode is connected to the first connector, and the negative pole of the second diode is connected to the negative pole of the first diode.

[0016] In one embodiment, the battery management system further includes a timing module and a third diode, wherein the timing module is connected to the first control module; the anode of the third diode is connected to the timing module, and the cathode of the third diode is connected to the cathode of the second diode.

[0017] In one embodiment, the battery management system further includes a current collection resistor, one end of the current collection resistor is connected to the battery pack and the second control module, and the other end of the current collection resistor is connected to the second control module.

[0018] In one embodiment, the battery management system further includes a second connector and a voltage collection and balancing module, the second connector is connected to the battery pack; the voltage collection and balancing module is connected to the second connector and the second control module.

[0019] In one embodiment, the battery management system also includes a first resistor and a fourth diode, one end of the first resistor is connected to the second connector; the anode of the fourth diode is connected to the other end of the first resistor, and the cathode of the fourth diode is connected to the second control module.

[0020] In one embodiment, the battery management system further includes a temperature detection module, an input end of the temperature detection module is connected to the second connector, and an output end of the temperature detection module is connected to the first control module.

[0021] Beneficial effects of the embodiments of the present invention:

[0022] In an embodiment of the present invention, by adding a power-off mode on the basis of the original mode, not only the number of modes of the functional state of the device is enriched, thereby improving the technical problem of the small number of modes of the functional state of the device; and the newly added power-off mode can be switched with the original mode when triggered by corresponding conditions, thereby realizing the organic integration of the various modes of the functional state of the device, so that it can be applied to more application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a schematic diagram of the functional status of a device provided by an embodiment of the present invention;

[0025] Figure 2 is a structural diagram of a battery management system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0027] This application provides a battery management system. Figure 1 and Figure 2 ,like Figure 1 As shown, the device functional state includes a sleep mode (SLEEP MODE), a normal mode (NORMAL MODE) and a power down mode (POWER DOWN MODE). The battery management system includes a control module, which is used to control the device functional state ((Device FunctionalStates, FSM)). Wherein, under the first condition, the control module is used to control the device functional state to switch from the normal mode to the power down mode; under the second condition, the control module is used to control the device functional state to switch from the power down mode to the sleep mode.

[0028] It can be understood that in the embodiments of the present invention, by adding a power-off mode based on the original mode, not only the number of modes of the device functional state is enriched, thereby improving the technical problem of the small number of modes of the device functional state; and the newly added power-off mode can be switched with the original mode when triggered by corresponding conditions, thereby realizing the organic integration of the various modes of the device functional state, so that it can be applied to more application scenarios.

[0029] It should be noted that the control module includes a first control module 10 and a second control module 11, the second control module 11 is connected to the first control module 10 to interact with the control signal, and the second control module 11 is used to control the functional state of the device. The first control module 10 can be a controller such as a microcontroller unit (MCU). The second control module 11 can be an integrated circuit (Uchip) integrating multiple chips, for example, it can include a power management chip (PMIC), a gate driver (Gatedriver) and an analog front end (AFE) chip.

[0030] The power-down mode means that all sources of the device are turned off.

[0031] In one embodiment, the first condition is watchdog failure. In response to the watchdog failure, at least one of the first control module 10 and the second control module 11 obtains fault information of the battery management system and saves the fault information in the second control module 11 .

[0032] It should be noted that the watchdog failure may be continuous, for example, more than 30 seconds or 1 minute, etc. The watchdog failure may be an abnormal situation, so that in this abnormal situation, more fault information of the battery management system can be obtained through at least one of the first control module 10 and the second control module 11, and the fault information (diagnostic information) can be saved through the second control module 11, so as to analyze and locate the diagnostic information later, thereby reducing the difficulty of finding the cause of the fault after the battery has a related fault.

[0033] It should be noted that the first condition may also be failure of the oscillator of the second control module 11, failure of the main oscillator of the second control module 11, or thermal shutdown, wherein the oscillator failure includes failure of the main oscillator integrated in the second control module 11 and / or failure of the backup oscillator integrated in the second control module 11. Main oscillator failure refers to a situation where the main oscillator is stuck or damaged and cannot work.

[0034] In one embodiment, the second condition is that the effective duration of the watchdog is greater than or equal to a preset duration, and the preset duration is the switching duration from the power-down mode to the sleep mode. Alternatively, the second condition is that the backup oscillator integrated in the second control module 11 fails and / or the external crystal oscillator connected to the second control module 11 fails.

[0035] It should be noted that the newly added power-off mode can be switched with the original normal mode and sleep mode through the first condition and the second condition, which realizes the organic integration of various modes of device functional status, so that it can be applied to more application scenarios.

[0036] like Figure 1As shown, when the internal power-on reset is invalid, the second control module is used to control the functional state of the device to switch from other modes such as sleep mode, normal mode, standby mode or power-off mode to power-off mode. When the internal power-on reset is valid, the second control module is used to control the functional state of the device to switch from power-off mode to sleep mode. In the case of failure of the backup oscillator and / or failure of the external crystal oscillator, the second control module is used to control the functional state of the device to switch from standby mode to sleep mode. When ignition wake-up is valid or hard-line wake-up is valid, the second control module is used to control the functional state of the device to switch from sleep mode to normal mode. In the case of ignition wake-up is invalid and a request command to enter standby mode is issued, the second control module is used to control the functional state of the device to switch from normal mode to standby mode.

[0037] In the case where the ignition wake-up is invalid and there is a request command to enter the sleep mode or in response to a backup oscillator failure, the second control module is used to control the device function state to switch from the normal mode to the sleep mode.

[0038] Under the third condition, the second control module is used to control the device function state to switch from standby mode to normal mode. The third condition is the validity of ignition wake-up, hard line wake-up, cycle fault detection request signal, active diagnosis fault detection request signal, short circuit detection request signal, timing wake-up signal, charge and discharge wake-up signal, battery deep undervoltage detection request signal, or exceeding the overflow time threshold.

[0039] It should be noted that the conditions for switching between the modes may be derived from the Uchip and its peripheral circuits, and / or the MCU and its peripheral circuits.

[0040] In view of the problem that it is impossible to switch to a safe state under abnormal conditions, the present application provides a battery management system, such as Figure 2 As shown, the battery management system includes a drive control module 12, a first control module 10 and a second control module 11. The first end of the drive control module 12 is configured to be connected to the positive electrode (BAT+) of the battery pack 20, and the second end of the drive control module 12 is connected to the first connection terminal KL30; the second control module 11 is connected to the control ends of the first control module 10 and the drive control module 12. When the first control module 10 is abnormal, the second control module 11 is configured to control the drive control module 12 to delay disconnection.

[0041] It can be understood that in the embodiments of the present application, when the first control module 10 is abnormal, the second control module 11 is configured to control the drive control module 12 to close for a period of time and then disconnect. When an abnormality occurs in the first control module 10, the battery pack 20 can continue to provide the necessary energy for the entire vehicle through the first connection terminal KL30 to switch to a safe state, thereby improving the technical problem of being unable to switch to a safe state under abnormal circumstances.

[0042] It should be noted that delayed disconnection means disconnection after a period of time. The second control module 11 can collect information such as battery voltage and temperature, and diagnose the battery status, and send it to the first control module 10. Combined with the state of the battery management system itself, the second control module 11 can intelligently control the closing and disconnection of the circuit where the drive control module 12 is located, so as to realize the charge and discharge management of the low-voltage battery.

[0043] In one embodiment, if Figure 2 As shown, the battery management system also includes a charging current limiting module 13, the input end of the charging current limiting module 13 is connected to the second end of the driving control module 12, the first output end of the charging current limiting module 13 is connected to the first end of the driving control module 12, and the second output end of the charging current limiting module 13 is connected to the first control module 10.

[0044] It should be noted that the charging current limiting module 13 is used to monitor and limit the charging current provided to the battery pack 20, and report the charging current data and / or whether over-current limiting charging occurs to the first control module 10 through the IIC communication protocol.

[0045] In one embodiment, if Figure 2 As shown, the battery management system also includes a first connector 16, a communication module 14, a first diode D1 and a second diode D2. The first connector 16 is connected to the first control module 10; the communication module 14 is connected between the first control module 10 and the first connector 16; the anode of the first diode D1 is connected to the communication module 14, and the cathode of the first diode D1 is connected to the second control module 11; the anode of the second diode D2 is connected to the first connector 16, and the cathode of the second diode D2 is connected to the cathode of the first diode D1.

[0046] It should be noted that the communication module 14 can be a CAN module, and the CAN module can communicate with the first control module 10 through the SPI protocol to receive (RX) or send (TX) data to each other. The first control module 10 sends the information such as the voltage, temperature and diagnostic status of the battery obtained by the second control module 11 to the vehicle controller through the first connector 16 through the CAN module, and receives the control command from the vehicle controller. The CAN module can also output a first wake-up signal INH according to the communication situation, and the first wake-up signal INH is output to the second control module 11 through the first diode D1. The vehicle controller also provides a reset signal EXT_RST to the first control module 10 through the first connector 16 to reset the first control module 10. The vehicle controller also provides an external wake-up signal EXT_WAKEUP through the first connector 16, and the external wake-up signal EXT_WAKEUP is merged with the first wake-up signal INH through the second diode D2 to form a wake-up signal Wake_Up, which only occupies one input end of the second control module 11 to realize multiple wake-ups, which reduces the number of input ends of the second control module 11.

[0047] In one embodiment, the battery management system further includes a timing module 15 and a third diode D3, the timing module 15 is connected to the first control module 10; the anode of the third diode D3 is connected to the timing module 15, and the cathode of the third diode D3 is connected to the cathode of the second diode D2.

[0048] It should be noted that the timing module 15 can also be an RTC module, which has the function of timing and timing output of the second wake-up signal INT. The second wake-up signal INT can be output through the third diode D3 and then merged with the first wake-up signal INH and the external wake-up signal EXT_WAKEUP into a wake-up signal Wake_Up. It only takes up one input end of the second control module 11 to realize multiple wake-ups, further reducing the number of input ends used in the second control module 11. Among them, the timing module 15 can interact with the first control module 10 through the IIC protocol.

[0049] In one embodiment, the battery management system also includes a current collection resistor R1, one end of the current collection resistor R1 is connected to the negative electrode (BAT-) of the battery pack 20 and the second control module 11, and the other end of the current collection resistor R1 is connected to the second control module 11 and the second connection terminal KL31.

[0050] It should be noted that the current collection resistor R1 can collect the current of the battery in the battery pack 20 and convert it into a corresponding voltage and output it to the second control module 11. The second control module 11 then converts the voltage into a corresponding current to obtain the battery current.

[0051] In one embodiment, the battery management system further includes a second connector 19 and a voltage acquisition and balancing module 18 , wherein the second connector 19 is connected to the battery pack 20 ; the voltage acquisition and balancing module 18 is connected to the second connector 19 and the second control module 11 .

[0052] It should be noted that the voltage collection and balancing module 18 can collect the battery voltages in the battery pack 20 through the second connector 19 and balance the battery voltages.

[0053] In one embodiment, the battery management system also includes a first resistor R2 and a fourth diode D4, one end of the first resistor R2 is connected to the second connector 19; the anode of the fourth diode D4 is connected to the other end of the first resistor R2, and the cathode of the fourth diode D4 is connected to the second control module 11.

[0054] It should be noted that the first resistor R2 and the fourth diode D4 can provide the second control module 11 with a corresponding operating voltage (VBAT), and the fourth diode D4 can prevent the operating voltage from affecting the second connector 19 .

[0055] In one embodiment, the battery management system further includes a temperature detection module 17 , an input end of the temperature detection module 17 is connected to the second connector 19 , and an output end of the temperature detection module 17 is connected to the first control module 10 .

[0056] It should be noted that the temperature detection module 17 can monitor the temperature of the battery pack 20 in real time through the second connector 19 , and transmit the temperature to the second control module 11 through the first control module 10 .

[0057] In one embodiment, the present application provides an electronic device, which includes the above-mentioned battery management system.

[0058] It can be understood that in the embodiments of the present application, by adding a power-off mode based on the original mode, not only the number of modes of the device functional state is enriched, thereby improving the technical problem of the small number of modes of the device functional state; and the newly added power-off mode can be switched with the original mode when triggered by corresponding conditions, thereby realizing the organic integration of the various modes of the device functional state, so that it can be applied to more application scenarios.

[0059] Furthermore, in the embodiment of the present application, when the first control module 10 is abnormal, the second control module 11 is configured to control the drive control module 12 to close for a period of time and then disconnect. When an abnormality occurs in the first control module 10, the battery pack 20 can continue to provide the necessary energy for the entire vehicle through the first connection terminal KL30 to switch to a safe state, thereby improving the technical problem of being unable to switch to a safe state under abnormal circumstances.

[0060] It should be noted that the above-mentioned electronic equipment may be new energy vehicles, electric vehicles and other equipment.

[0061] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery management system, characterized in that: The battery management system comprises: A control module, the control module is used to control the functional state of the device, the functional state of the device includes a sleep mode, a normal mode and a power-off mode; Among them, under the first condition, the control module is used to control the functional state of the device to switch from the normal mode to the power-off mode; under the second condition, the control module is used to control the functional state of the device to switch from the power-off mode to the sleep mode.

2. The battery management system according to claim 1, characterized in that: The control module includes a first control module and a second control module, the first control module is connected to the second control module, and the second control module is used to control the functional state of the device; The first condition is watchdog failure. In response to the watchdog failure, at least one of the first control module and the second control module obtains fault information of the battery management system, and saves the fault information through the second control module.

3. The battery management system according to claim 1, characterized in that: The control module includes a first control module and a second control module, and the first condition is that an oscillator of the second control module fails, a main oscillator of the second control module fails, or a thermal shutdown occurs, wherein the oscillator failure includes a main oscillator integrated in the second control module fails and / or a backup oscillator integrated in the second control module fails.

4. The battery management system according to any one of claims 1 to 3, characterized in that: The control module includes a first control module and a second control module, the second condition is that the effective duration of the watchdog is greater than or equal to a preset duration, and the preset duration is the switching duration from the power-down mode to the sleep mode; or, the second condition is that a backup oscillator integrated in the second control module fails and / or an external crystal oscillator connected to the second control module fails.

5. The battery management system according to any one of claims 1 to 3, characterized in that: The control module includes a first control module and a second control module. The device functional state also includes a power-off mode and a standby mode. In response to the invalidation of the internal power-on reset, the second control module is used to control the device functional state to switch from the sleep mode, the normal mode, the standby mode or the power-off mode to the power-off mode.

6. The battery management system according to any one of claims 1 to 3, characterized in that: The control module includes a first control module and a second control module, and the functional state of the device further includes a power-off mode and a standby mode. In response to the validity of the internal power-on reset, the second control module is used to control the functional state of the device to switch from the power-off mode to the sleep mode; in response to the failure of the backup oscillator of the second control module and / or the failure of the external crystal oscillator connected to the second control module, the second control module is used to control the functional state of the device to switch from the standby mode to the sleep mode; in response to the validity of the ignition wake-up or the validity of the hard-line wake-up, the second control module is used to control the functional state of the device to switch from the sleep mode to the normal mode; In response to a request command for invalidating ignition wakeup and entering the standby mode, the second control module is used to control the device function state to switch from the normal mode to the standby mode.

7. The battery management system according to any one of claims 1 to 3, characterized in that: The control module includes a first control module and a second control module. In response to an invalid ignition wake-up and a request command to enter the sleep mode or in response to a failure of a backup oscillator of the second control module, the second control module is used to control the functional state of the device to switch from the normal mode to the sleep mode.

8. The battery management system according to any one of claims 1 to 3, characterized in that: The control module includes a first control module and a second control module, and the device functional state also includes a standby mode. Under a third condition, the second control module is used to control the device functional state to switch from the standby mode to the normal mode. The third condition is that the ignition wake-up is valid, the hard line wake-up is valid, the cycle fault detection request signal is valid, the active diagnosis fault detection request signal is valid, the short circuit detection request signal is valid, the timing wake-up signal is valid, the charge and discharge wake-up signal is valid, the battery deep undervoltage detection request signal is valid, or the overflow time threshold is exceeded.

9. An electronic device, characterized in that: The electronic device comprises a battery management system as claimed in any one of claims 1 to 8.

10. The electronic device according to claim 9, characterized in that: The control module includes a first control module and a second control module, the first control module is connected to the second control module, and the second control module is used to control the functional state of the device; The battery management system also includes a charging current limiting module, an input end of the charging current limiting module is connected to the first connection end, a first output end of the charging current limiting module is configured to be connected to a battery pack, and a second output end of the charging current limiting module is connected to the first control module.

11. The electronic device according to claim 10, characterized in that: The battery management system further comprises: a first connector, wherein the first connector is connected to the first control module; a communication module connected between the first control module and the first connector; a first diode, wherein an anode of the first diode is connected to the communication module, and a cathode of the first diode is connected to the second control module; A second diode, wherein an anode of the second diode is connected to the first connector, and a cathode of the second diode is connected to the cathode of the first diode.

12. The electronic device according to claim 11, characterized in that: The battery management system further comprises: A timing module, wherein the timing module is connected to the first control module; A third diode, wherein an anode of the third diode is connected to the timing module, and a cathode of the third diode is connected to the cathode of the second diode.

13. The electronic device according to any one of claims 10 to 12, characterized in that: The battery management system further includes a current collection resistor, one end of which is connected to the battery pack and the second control module, and the other end of which is connected to the second control module.

14. The electronic device according to claim 13, characterized in that: The battery management system further comprises: a second connector connected to the battery pack; A voltage collection and balancing module is connected to the second connector and the second control module.

15. The electronic device according to claim 14, characterized in that: The battery management system further comprises: a first resistor, one end of which is connected to the second connector; A fourth diode, wherein an anode of the fourth diode is connected to the other end of the first resistor, and a cathode of the fourth diode is connected to the second control module.

16. The electronic device according to any one of claims 10 to 12, characterized in that: The battery management system further includes a temperature detection module, an input end of the temperature detection module is connected to the second connector, and an output end of the temperature detection module is connected to the first control module.

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