Battery management system

Abstract

The utility model provides a battery management system comprising a button switch, a first end of the button switch is used for being connected to a battery, and a second end of the button switch is grounded; the switching circuit is connected to the battery and the key switch; a controller connected to the switching circuit; wherein under the condition that the controller is not connected to the battery, the key switch is used for providing a high-level signal to the switching circuit in a closed state so as to control the switching circuit to be switched on, so that the controller is connected to the battery through the switching circuit; and under the condition that the controller is connected to the battery, the controller is used for providing a high level signal for the switching circuit to control the switching circuit to be kept on, so that the key switch can be switched to the off state. According to the battery management system provided by the utility model, the service life of the key switch can be ensured, the key switch cannot be influenced by the magnitude of voltage, and the safety of operators and electronic devices is ensured.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and more specifically, to a battery management system. Background Technology

[0002] In related technologies, such as Figure 1 As shown, battery management systems typically power on their controllers by directly closing or opening a mechanical switch. However, directly closing the mechanical switch to power on results in the switch remaining energized for extended periods, posing a significant risk of failure and compromising long-term reliability. Conversely, directly opening the mechanical switch to power off causes arcing at the switch contacts, generating electromagnetic radiation that interferes with surrounding equipment. Furthermore, excessively high voltage can pose significant hazards to operators and electronic components. Utility Model Content

[0003] The present invention aims to at least solve the technical problems of unstable system operation and potential safety hazards caused by directly closing or opening mechanical switches for power-on and power-off in the prior art.

[0004] Therefore, this utility model provides a battery management system.

[0005] This utility model provides a battery management system, including: a push-button switch, with a first end connected to a battery and a second end grounded; a switch circuit connected to the battery and the push-button switch; and a controller connected to the switch circuit. When the controller is not connected to the battery, the push-button switch, in a closed state, provides a high-level signal to the switch circuit to control the switch circuit to conduct, allowing the controller to connect to the battery via the switch circuit. When the controller is connected to the battery, the controller provides a high-level signal to the switch circuit to control the switch circuit to remain on, allowing the push-button switch to switch to an off state. When the controller is connected to the battery and the push-button switch is switched to a closed state, the controller provides a low-level signal to the switch circuit. When the push-button switch is switched to an off state, the push-button switch provides a low-level signal to control the switch circuit to disconnect, disconnecting the controller from the battery.

[0006] The battery management system provided by this utility model includes a push-button switch, a switching circuit, and a controller. The push-button switch is operated by the operator to power on and off the controller, i.e., to connect the controller to the battery or disconnect the controller from the battery. Specifically, the push-button switch can be a spring-reset switch; that is, when the operator presses the push-button switch, the switch closes and conducts; when the operator releases the push-button switch, the switch opens.

[0007] Further, the switch circuit is connected to the battery and the key switch, and the controller is connected to the switch circuit. By the key switch, the on and off states of the switch circuit can be controlled, so that when the switch circuit is on, the controller can be connected to the battery through the switch circuit to realize the power-on of the controller, and vice versa, when the switch circuit is off, the controller is disconnected from the battery, that is, the power-off of the controller is realized.

[0008] Specifically, when the controller is not connected to the battery, that is, the controller is not powered on, the key switch can be used to switch to the closed state, at this time, the key switch can provide a high-level signal to the switch circuit, so that the switch circuit is turned on. When the switch circuit is on, the controller can be connected to the battery through the switch circuit, thereby completing the power-on of the controller.

[0009] Further, when the controller is connected to the battery, that is, after the battery management system is powered on, the controller can provide a high-level signal to the switch circuit, so that the switch circuit can remain in the on state according to the high-level signal provided by the controller, that is, at this time the switch circuit does not need to provide a high-level signal by the key switch, but can remain in the on state according to the high-level signal provided by the controller, therefore, at this time the key switch does not need to remain in the closed state, and can be switched to the off state, and the controller can remain connected to the battery. That is, after the operator presses the key switch and the controller is powered on, the operator can release the key switch, so that the key switch does not need to remain in the closed state, thereby reducing the risk of failure of the key switch and ensuring the service life of the key switch.

[0010] Further, when the controller is connected to the battery, when the key switch is switched to the closed state, the controller can detect that the key switch provides a high-level signal to the switch circuit, at this time, it can be judged that the operator needs to power off the battery management system, therefore, the controller can provide a low-level signal to the switch circuit, at the same time, the operator can release the key switch, that is, switch the key switch to the off state, at this time the key switch also provides a low-level signal to the switch circuit, and the switch circuit can be switched from the on state to the off state when receiving the low-level signal, thereby disconnecting the controller from the battery to realize the power-off of the controller. By disconnecting the switch circuit, the power-off process of the controller is realized, so that during the power-off process, the contacts of the key switch will not produce electric arc, thereby reducing the generation of electromagnetic radiation, and the key switch will not be affected by the voltage, thereby ensuring the safety of the operator and electronic devices.

[0011] The battery management system provided by the utility model has the advantages that the on-off of the switch circuit can be controlled through the key switch and the controller simultaneously, and after the controller is connected with the battery, the key switch does not need to be kept in the closed state, so that the key switch does not need to be in the electrified state for a long time, the failure risk of the key switch is reduced, and the service life of the key switch is guaranteed.

[0012] In addition, the battery management system according to the above technical scheme provided by the utility model can also have the following additional technical features.

[0013] In some technical schemes, optionally, the switch circuit comprises: a first transistor, an input end of the first transistor being connected to the battery, and an output end of the first transistor being connected to the controller; a second transistor, an input end of the second transistor being grounded, an output end of the second transistor being connected to a control end of the first transistor, and a control end of the second transistor being connected to a second end of the key switch and the controller.

[0014] In some technical schemes, optionally, the switch circuit further comprises: a flip-flop, the flip-flop being connected between the controller and the control end of the second transistor.

[0015] In some technical schemes, optionally, the switch circuit further comprises: a first resistor, the first resistor being connected to the control end of the first transistor and the input end of the first transistor; and a second resistor, the second resistor being connected to the control end of the second transistor and the input end of the second transistor.

[0016] In some technical schemes, optionally, the switch circuit further comprises: a third resistor, the third resistor being connected to the control end of the first transistor and the output end of the second transistor.

[0017] In some technical solutions, the battery management system may optionally include: a wireless control module connected to the switching circuit and the controller, used for wireless connection with a terminal device; wherein, when the controller is not connected to the battery, the wireless control module receives a power-on command from the terminal device and, according to the power-on command, provides a high-level signal to the switching circuit to control the switching circuit to conduct, so that the controller connects to the battery through the switching circuit; when the controller is connected to the battery, the controller provides a high-level signal to the switching circuit to control the switching circuit to remain on, so that the wireless control module stops providing a high-level signal to the switching circuit; when the controller is connected to the battery and the battery management system malfunctions, the controller provides a low-level signal to the switching circuit to control the switching circuit to disconnect, and the wireless control module sends a fault indication message to the terminal device; when the controller is connected to the battery and the wireless control module receives a power-off command from the terminal device, the controller provides a low-level signal to the switching circuit to control the switching circuit to disconnect, so that the controller is disconnected from the battery.

[0018] In some technical solutions, the battery management system may optionally include an energy storage unit, one end of which is connected to a switching circuit and the other end of which is connected to a wireless control module; the energy storage unit is used to store electrical energy when the switching circuit is on and to provide power to the wireless control module when the switching circuit is off.

[0019] In some technical solutions, the battery management system may optionally include: a step-down module, the input of which is connected to a switching circuit; a first voltage regulator module, one end of which is connected to the output of the step-down module and the other end of which is connected to a controller; and a second voltage regulator module, one end of which is connected to the output of the step-down module and the other end of which is connected to a wireless control module.

[0020] In some technical solutions, the battery management system may optionally include a connection unit connected to the wireless control module, the wireless control module being wirelessly connected to the terminal device through the connection unit.

[0021] In some technical solutions, the battery management system may optionally include: a prompting unit connected to the controller; wherein the controller is used to control the prompting unit to issue a prompting message when the duration of the button switch being in the closed state reaches a preset duration.

[0022] Additional aspects and advantages of this invention will become apparent in the description that follows, or may be learned by practice of this invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

[0024] Figure 1 A circuit diagram of a battery management system in the related art is shown;

[0025] Figure 2 A circuit diagram of a battery management system provided by the present application is shown;

[0026] Figure 3 A flowchart of one of the battery management system control processes of the present application is shown;

[0027] Figure 4 A flowchart of another of the battery management system control processes of the present application is shown;

[0028] Figure 5 A flowchart of another of the battery management system control processes of the present application is shown;

[0029] Figure 6 A flowchart of another of the battery management system control processes of the present application is shown;

[0030] Figure 7 A flowchart of another of the battery management system control processes of the present application is shown.

[0031] Among them, Figure 2 The correspondence between the reference signs and the component names in the accompanying drawings is as follows:

[0032] 100 battery management system, 102 key switch, 104 switch circuit, 106 controller, 108 first transistor, 110 second transistor, 112 flip-flop, 114 first resistor, 116 second resistor, 118 third resistor, 120 wireless control module, 122 energy storage unit, 124 voltage reduction module, 126 first voltage stabilizing module, 128 second voltage stabilizing module, 130 connection unit, 132 prompting unit, 134 current limiting resistor, 200 battery, 300 terminal device. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can be practiced in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0035] The battery management system according to some embodiments of the present application will be described below with reference to Figures 2 to 7

[0036] Some embodiments of the present application provide a battery management system 100, as shown in the figure, comprising: a key switch 102, a first end of the key switch 102 being used for connecting to a battery 200, and a second end of the key switch 102 being grounded; a switch circuit 104, the switch circuit 104 being connected to the battery 200 and the key switch 102; a controller 106, the controller 106 being connected to the switch circuit 104; wherein, in the case that the controller 106 is not connected to the battery 200, the key switch 102 is used to provide a high-level signal to the switch circuit 104 in a closed state, to control the switch circuit 104 to be turned on, so as to make the controller 106 connected to the battery 200 through the switch circuit 104; in the case that the controller 106 is connected to the battery 200, the controller 106 is used to provide a high-level signal to the switch circuit 104, to control the switch circuit 104 to remain turned on, so as to enable the key switch 102 to be switched to an open state; in the case that the controller 106 is connected to the battery 200, and the key switch 102 is switched to the closed state, the controller 106 is used to provide a low-level signal to the switch circuit 104, and in the case that the key switch 102 is switched to the open state, the key switch 102 is used to provide a low-level signal to the switch circuit 104, to control the switch circuit 104 to be turned off, so as to make the controller 106 disconnected from the battery 200. Figure 2 The battery management system 100 provided by the present application comprises the key switch 102, the switch circuit 104 and the controller 106, wherein the key switch 102 can be used for being operated by an operator, to realize power-on and power-off of the controller 106, that is, to realize connection of the controller 106 to the battery 200, or disconnection between the controller 106 and the battery 200. Specifically, the key switch 102 can be a spring return switch, that is, in the case that the operator presses the key switch 102, the key switch 102 is closed and turned on, and in the case that the operator releases the key switch 102, the key switch 102 is opened.

[0037]

[0038] ​​Further, the switch circuit 104 is connected to the battery 200 and the key switch 102, and the controller 106 is connected to the switch circuit 104. By the key switch 102, the on and off states of the switch circuit 104 can be controlled, so that when the switch circuit 104 is on, the controller 106 can be connected to the battery 200 through the switch circuit 104 to realize the power-on of the controller 106, and conversely, when the switch circuit 104 is off, the controller 106 is disconnected from the battery 200, that is, the power-off of the controller 106 is realized.

[0039] Specifically, when the controller 106 is not connected to the battery 200, that is, the controller 106 is not powered on, the key switch 102 can be used to switch to the closed state, at this time, the key switch 102 can provide a high-level signal to the switch circuit 104, so that the switch circuit 104 is turned on. When the switch circuit 104 is on, the controller 106 can be connected to the battery 200 through the switch circuit 104, so as to complete the power-on of the controller 106.

[0040] Further, when the controller 106 is connected to the battery 200, that is, after the battery management system 100 is powered on, the controller 106 can provide a high-level signal to the switch circuit 104, so that the switch circuit 104 can remain in the on state according to the high-level signal provided by the controller 106, that is, at this time, the switch circuit 104 does not need to be provided with a high-level signal by the key switch 102, but can remain in the on state according to the high-level signal provided by the controller 106, therefore, at this time, the key switch 102 does not need to remain in the closed state, and can be switched to the off state, and the controller 106 can remain connected to the battery 200. That is, after the operator presses the key switch 102 and the controller 106 is powered on, the operator can release the key switch 102, so that the key switch 102 does not need to remain in the closed state, and further, the key switch 102 does not need to be in the live state for a long time, reducing the failure risk of the key switch 102, and ensuring the service life of the key switch 102.

[0041] Further, in the case that the controller 106 is connected to the battery 200, when the key switch 102 is switched to the closed state, the controller 106 can detect that the key switch 102 provides a high level signal to the switch circuit 104, at this time, it can be judged that the operator needs to power down the battery management system 100, therefore, the controller 106 can provide a low level signal to the switch circuit 104, at the same time, the operator can release the key switch 102, that is, switch the key switch 102 to the open state, at this time the key switch 102 also provides a low level signal to the switch circuit 104, the switch circuit 104 can be switched from the on state to the off state when receiving the low level signal, thereby realizing the disconnection between the controller 106 and the battery 200, to realize the power down of the controller 106. Through the disconnection of the switch circuit 104, the power down process of the controller 106 is realized, so that the contacts of the key switch 102 do not produce electric arc in the power down process, thereby reducing the generation of electromagnetic radiation, and the key switch 102 is not affected by the voltage size, ensuring the safety of the operator and electronic devices.

[0042] The battery management system 100 provided by the utility model can realize the control of the on-off of the switch circuit 104 through the key switch 102 and the controller 106 at the same time, thereby realizing the disconnection between the controller 106 and the battery 200 without keeping the key switch 102 in the closed state, so that the key switch 102 does not need to be in the electrified state for a long time, the failure risk of the key switch 102 is reduced, and the service life of the key switch 102 is guaranteed.

[0043] In some embodiments, optionally, the switch circuit 104 comprises: a first transistor 108, an input end of the first transistor 108 being connected to the battery 200, and an output end of the first transistor 108 being connected to the controller 106; a second transistor 110, an input end of the second transistor 110 being grounded, an output end of the second transistor 110 being connected to a control end of the first transistor 108, and the control end of the second transistor 110 being connected to the second end of the key switch 102 and the controller 106.

[0044] In this embodiment, the switch circuit 104 comprises a first transistor 108, an input end of the first transistor 108 is connected to the battery 200, and an output end of the first transistor 108 is connected to the controller 106, that is, when the input end and the output end of the first transistor 108 are turned on, the controller 106 can be connected to the battery 200 through the first transistor 108, that is, the controller 106 is powered on.

[0045] Further, the switch circuit 104 further comprises a second transistor 110, an input end of the second transistor 110 is grounded, an output end of the second transistor 110 is connected to a control point of the first transistor 108, and a control end of the second transistor 110 is connected to the second end of the switch piece. That is, when the switch piece is in a closed state, the electric energy provided by the battery 200 can be transmitted to the second end of the switch piece, so as to transmit a high-level signal to the control end of the second transistor 110, and then make the input end and the output end of the second transistor 110 be turned on. At this time, the control end of the first transistor 108 is connected to the output end of the second transistor 110, so that the level signal of the control end of the first transistor 108 changes, so as to make the input end and the output end of the first transistor 108 be turned on, and then the controller 106 can be connected to the battery 200.

[0046] In addition, it should be noted that a plurality of current limiting resistors 134 can be arranged between the key switch 102 and the battery 200, and between the key switch 102 and the ground, so as to play a current limiting role, so as to avoid that the current of the high-level signal provided by the switch piece to the second transistor 110 is too large, and the second transistor 110 is damaged.

[0047] Further, the control end of the second transistor 110 is also connected to the controller 106, after the controller 106 is connected to the battery 200, the controller 106 can send a high-level signal to the control end of the second transistor 110, at this time, the second transistor 110 can keep the on state based on the high-level signal provided by the controller 106, so that the high-level signal does not need to be provided through the key switch 102, at this time, the key switch 102 can be switched to the off state.

[0048] Further, when the controller 106 is connected to the battery 200, the operator can press the key switch 102, that is, when the key switch 102 is in the closed state, the key switch 102 provides a high-level signal to the control end of the second transistor 110, at this time, the controller 106 judges that the operator needs to perform the power-off operation, and the controller 106 can provide a low-level signal to the control end of the second transistor 110, then the operator releases the key switch 102, the key switch 102 provides a low-level signal to the control end of the second transistor 110, that is, at this time, the controller 106 and the key switch 102 simultaneously provide a low-level signal to the control end of the second transistor 110, so as to disconnect the input end and the output end of the second transistor 110. At the same time, the control end of the first transistor 108 is connected to the output end of the second transistor 110, so the level state of the control end of the first transistor 108 changes, at this time, the input end and the output end of the first transistor 108 are disconnected, thereby realizing the power-off of the controller 106.

[0049] Specifically, the first transistor 108 can be a P-type metal oxide semiconductor field effect transistor (PMOS), the source of the PMOS is connected to the battery 200, and the drain of the PMOS is connected to the controller 106. The second transistor 110 can be an N-type metal oxide semiconductor field effect transistor (NMOS), the source of the NMOS is grounded, the drain of the NMOS is connected to the gate of the PMOS, and the gate of the NMOS is connected to the second end of the key switch 102 and the controller 106.

[0050] In some embodiments, optionally, the switch circuit 104 further comprises a flip-flop 112 connected between the controller 106 and the control end of the second transistor 110.

[0051] In this embodiment, the switch circuit 104 can further comprise a flip-flop 112 connected to the control end of the second transistor 110 and the controller 106, that is, the controller 106 can control the flip-flop 112 to change the level signal of the control end of the second transistor 110, thereby providing a high-level signal or a low-level signal to the second transistor 110.

[0052] Specifically, the flip-flop 112 can be a D flip-flop, and the controller 106 can change the state of the D flip-flop to provide a high-level signal or a low-level signal to the control end of the second transistor 110.

[0053] In some embodiments, optionally, the switch circuit 104 further comprises: a first resistor 114 connected to the control end of the first transistor 108 and the input end of the first transistor 108; and a second resistor 116 connected to the control end of the second transistor 110 and the input end of the second transistor 110.

[0054] In this embodiment, the switch circuit 104 can comprise the first resistor 114 connected between the control end of the first transistor 108 and the input end of the first transistor 108. By setting the first resistor 114, the current between the control end and the input end of the first transistor 108 can be limited, so as to avoid the current between the control end and the input end of the first transistor 108 being too large when the level state of the control end of the first transistor 108 changes, thereby preventing the first transistor 108 from being damaged and ensuring the stable operation of the first transistor 108.

[0055] Further, the switch circuit 104 can comprise the second resistor 116 connected between the control end of the second transistor 110 and the input end of the second transistor 110. By setting the second resistor 116, the current between the control end and the input end of the second transistor 110 can be limited, so as to avoid the current between the control end and the input end of the second transistor 110 being too large when the level state of the control end of the second transistor 110 changes, thereby preventing the second transistor 110 from being damaged and ensuring the stable operation of the second transistor 110.

[0056] In some embodiments, optionally, the switch circuit 104 further comprises: a third resistor 118 connected to the control end of the first transistor 108 and the output end of the second transistor 110.

[0057] In this embodiment, the third resistor 118 can be further arranged between the control end of the first transistor 108 and the output end of the second transistor 110. By setting the third resistor 118, the current between the first transistor 108 and the second transistor 110 can be limited, so as to avoid the first transistor 108 and the second transistor 110 being damaged due to the current between the first transistor 108 and the second transistor 110 being too large.

[0058] In some embodiments, the battery management system 100 further comprises a wireless control module 120 connected to the switch circuit 104 and the controller 106, the wireless control module 120 being configured to wirelessly connect to the terminal device 300; wherein, when the controller 106 is not connected to the battery 200, the wireless control module 120 is configured to receive a power-on instruction sent by the terminal device 300, and provide a high-level signal to the switch circuit 104 according to the power-on instruction, so as to control the switch circuit 104 to be turned on, so that the controller 106 is connected to the battery 200 through the switch circuit 104; when the controller 106 is connected to the battery 200, the controller 106 is configured to provide a high-level signal to the switch circuit 104, so as to control the switch circuit 104 to remain turned on, so that the wireless control module 120 stops providing the high-level signal to the switch circuit 104; when the controller 106 is connected to the battery 200 and the battery management system 100 fails, the controller 106 is configured to provide a low-level signal to the switch circuit 104, so as to control the switch circuit 104 to be turned off, and the wireless control module 120 is configured to send a failure prompt information to the terminal device 300; when the controller 106 is connected to the battery 200 and the wireless control module 120 receives a power-off instruction sent by the terminal device 300, the controller 106 is configured to provide a low-level signal to the switch circuit 104, so as to control the switch circuit 104 to be turned off, so that the controller 106 is disconnected from the battery 200.

[0059] In this embodiment, the battery management system 100 further comprises the wireless control module 120, which can be understood as being wirelessly connected to the terminal device 300, so that the operator can operate the wireless control module 120 through the terminal device 300. Meanwhile, the wireless control module 120 is also connected to the switch circuit 104 and the controller 106, so that the operator can remotely control the power-on and power-off process of the battery management system 100 through the terminal device 300, thereby improving the convenience of the operator in operating the battery management system 100, that is, the wireless control module 120 can be controlled through the terminal device 300 to realize the remote wireless power-on and power-off function. In addition, by controlling the wireless control module 120, the timely uploading and displaying of failure information can also be realized, thereby improving the user experience of the operator.

[0060] Specifically, in the case that the controller 106 is not connected to the battery 200, that is, the controller 106 is not powered on, the operator can send a power-on instruction to the wireless control module 120 through the terminal device 300, and the wireless control module 120 receives the power-on instruction, that is, a high-level signal is provided to the switch circuit 104, so that the switch circuit 104 is turned on. In the case that the switch circuit 104 is turned on, the controller 106 is connected to the battery 200 through the switch circuit 104, so as to complete the power-on of the controller 106.

[0061] Further, in the case that the controller 106 is connected to the battery 200, that is, after the battery management system 100 is powered on, the controller 106 can provide a high-level signal to the switch circuit 104, so that the switch circuit 104 can remain in the on state according to the high-level signal provided by the controller 106, that is, at this time the switch circuit 104 does not need to be provided with a high-level signal by the wireless control module 120, but can remain in the on state according to the high-level signal provided by the controller 106, so at this time the wireless control module 120 can stop providing a high-level signal to the switch circuit 104.

[0062] Further, in the case that the controller 106 is connected to the battery 200, that is, when the controller 106 is in the power-on state, if the battery management system 100 fails, the controller 106 can first provide a low-level signal to the switch circuit 104, at this time the switch circuit 104 is disconnected, and the battery management system 100 is powered off, so as to avoid damage to the battery management system 100 due to failure. Then, the controller 106 can also send failure information to the terminal device 300 of the operator through the wireless control module 120, so that the failure of the battery management system 100 can be sent to the operator in time, so that the operator can handle the failure in time.

[0063] Further, in the case that the controller 106 is connected to the battery 200, at this time if a power-off instruction sent by the terminal device 300 is received, it can be judged that the operator needs to power off the battery management system 100, therefore, the controller 106 can provide a low-level signal to the switch circuit 104, and the switch circuit 104 can switch from the on state to the off state when receiving the low-level signal, thereby realizing the disconnection between the controller 106 and the battery 200, so as to realize the power-off of the controller 106.

[0064] In some embodiments, the battery management system 100 further comprises a storage unit 122, one end of the storage unit 122 is connected to the switch circuit 104, and the other end of the storage unit 122 is connected to the wireless control module 120; the storage unit 122 is configured to store electric energy when the switch circuit 104 is turned on, and provide electric energy for the wireless control module 120 when the switch circuit 104 is turned off.

[0065] In this embodiment, the battery management system 100 further comprises the storage unit 122, through which the storage of electric energy can be realized, so as to provide electric energy for the wireless control module 120 when the switch circuit 104 is turned off, so as to ensure the supply of electric energy for the wireless control module 120 when the battery management system 100 is in the power-off state, and further ensure the normal operation of the wireless control module 120, so that the operator can control the battery management system 100 to be powered on through the wireless control module 120.

[0066] Specifically, one end of the storage unit 122 is connected to the switch circuit 104, and the other end of the storage unit 122 is connected to the wireless control module 120. After the battery management system 100 is powered on for the first time, the electric energy provided by the battery 200 can be transmitted to the storage unit 122 through the switch circuit 104, so as to store electric energy in the storage unit 122. Then, after the battery management system 100 is powered off, the electric energy stored in the storage unit 122 can power the wireless control module 120, so as to ensure the normal operation of the wireless control module 120.

[0067] Specifically, the storage unit 122 can be a storage capacitor, through which the storage of electric energy can be realized. Alternatively, the storage unit 122 can be a battery 200, such as a small storage battery 200, e.g., a button battery 200.

[0068] In some embodiments, the battery management system 100 further comprises a step-down module 124, an input end of the step-down module 124 is connected to the switch circuit 104; a first voltage stabilizing module 126, one end of the first voltage stabilizing module 126 is connected to an output end of the step-down module 124, and the other end of the first voltage stabilizing module 126 is connected to the controller 106; and a second voltage stabilizing module 128, one end of the second voltage stabilizing module 128 is connected to the output end of the step-down module 124, and the other end of the second voltage stabilizing module 128 is connected to the wireless control module 120.

[0069] In this embodiment, the battery management system 100 further comprises the step-down module 124, through which the step-down of the electric energy provided by the battery 200 can be realized, so as to avoid the excessively high voltage transmitted to the controller 106 and the wireless control module 120, and to avoid the influence on the controller 106 and the wireless control module 120.

[0070] Specifically, the voltage reduction module 124 can include at least one buck circuit, through which the voltage reduction of the power provided by the battery 200 can be realized. Specifically, as shown in the figure, the voltage reduction module 124 can include two buck circuits, BUCK1 and BUCK2. Figure 2

[0071] Further, the battery management system 100 can further include a first voltage stabilizing module 126 and a second voltage stabilizing module 128, one end of the first voltage stabilizing module 126 is connected to the output end of the voltage reduction module 124, and the other end of the first voltage stabilizing module 126 is connected to the controller 106. Through the setting of the first voltage stabilizing module 126, the voltage stabilization of the power transmitted to the controller 106 can be realized, so as to ensure the voltage stability of the power transmitted to the controller 106, and further ensure the stable operation of the controller 106.

[0072] Correspondingly, one end of the second voltage stabilizing module 128 is connected to the voltage reduction module 124, and the other end of the second voltage stabilizing module 128 is connected to the wireless control module 120. Through the setting of the second voltage stabilizing module 128, the voltage stabilization of the power transmitted to the wireless control module 120 can be realized, so as to ensure the voltage stability of the power transmitted to the wireless control module 120, and further ensure the stable operation of the wireless control module 120.

[0073] Specifically, the first voltage stabilizing module 126 and the second voltage stabilizing module 128 can be set as low dropout linear voltage stabilizers (LDOs), as shown in the figure. Figure 2 LDO1 is the first voltage stabilizing module 126, and LDO2 is the second voltage stabilizing module 128. Among them, Figure 2 GND represents the ground end.

[0074] In some embodiments, the battery management system 100 can further include a connection unit 130, which is connected to the wireless control module 120, and the wireless control module 120 is wirelessly connected to the terminal device 300 through the connection unit 130.

[0075] In this embodiment, the battery management system 100 can further include a connection unit 130, through which the wireless connection between the wireless control module 120 and the terminal device 300 can be realized. Specifically, the connection unit 130 can be connected to the wireless control module 120, and at the same time, the connection unit 130 can be wirelessly connected to the terminal device 300, thereby realizing the wireless connection between the wireless control module 120 and the terminal device 300.

[0076] Specifically, the connection unit 130 can be a WIFI device or a Bluetooth device.

[0077] ​In some embodiments, the battery management system 100 further comprises a prompting unit 132 connected to the controller 106, wherein the controller 106 is configured to control the prompting unit 132 to send a prompting information when the duration of the closing state of the key switch 102 reaches the preset duration.

[0078] In this embodiment, the battery management system 100 further comprises a prompting unit 132, and the prompting unit 132 is connected to the controller 106. The controller 106 is configured to control the prompting unit 132 to send a prompting information when the duration of the closing state of the key switch 102 reaches the preset duration. The prompting information can be used to prompt the operator that the power-on process or the power-off process is completed, so as to prompt the operator to release the key switch 102.

[0079] Specifically, the prompting unit 132 can comprise an indicator. When the controller 106 is not connected to the battery 200, that is, the controller 106 is not powered on, the key switch 102 can be used to switch to the closing state. At this time, the key switch 102 can provide a high-level signal to the switch circuit 104, so as to make the switch circuit 104 conductive. When the switch circuit 104 is conductive, the controller 106 can be connected to the battery 200 through the switch circuit 104, so as to complete the power-on of the controller 106. After the power-on lasts for 2s, the controller 106 provides a high-level signal to the switch circuit 104, so as to make the switch circuit 104 keep the conductive state according to the high-level signal. The process of the controller 106 providing the high-level signal to the switch circuit 104 needs about 50ms. After the controller 106 provides the high-level signal to the switch circuit 104 for 200ms, the indicator can be controlled to light up. At this time, the operator can release the key switch 102 after seeing the indicator light up, and the power-on operation is completed.

[0080] On the contrary, when the controller 106 is connected to the battery 200, when the key switch 102 is switched to the closing state, the controller 106 can detect that the key switch 102 provides a high-level signal to the switch circuit 104. At this time, it can be judged that the operator needs to power off the battery management system 100. Therefore, the controller 106 can provide a low-level signal to the switch circuit 104. The process of the controller 106 providing the low-level signal to the switch circuit 104 needs more than 50ms. After the controller 106 provides the low-level signal to the switch circuit 104 for 200ms, the indicator can be controlled to be extinguished. At this time, the operator can release the key switch 102 after seeing the indicator extinguished, and the power-off operation is completed.

[0081] In one specific embodiment, as Figure 2 and Figure 3As shown, a power-on process of the battery management system 100 is provided by the key switch 102:

[0082] Step 302: The manual button presses the key switch, and the second transistor receives the high-level signal of the key switch;

[0083] Step 304: The input and output ends of the second transistor are turned on, and the input and output ends of the first transistor are turned on;

[0084] Step 306: The power supply outputs power to the controller through BUCK1, LDO1 and LDO2;

[0085] Step 308: The controller and the rectification / feedback chip are powered on;

[0086] Step 310: After the controller is powered on for 2s, the flip-flop outputs a high-level signal to the control end of the second transistor;

[0087] Step 312: The flip-flop and the high-level signal provided by the key switch compete for driving, so that the second transistor remains in the on state;

[0088] The process of the flip-flop providing a high-level signal to the second transistor takes about 50ms;

[0089] Step 314: After the controller controls the flip-flop to output a high-level signal to the control end of the second transistor for 200ms, the controller controls the indicator light to turn on;

[0090] Step 316: The key switch is released, and the key switch provides a low-level signal to the second transistor;

[0091] Step 318: The controller continues to provide a high-level signal to the second transistor, so that the second transistor and the first transistor remain in the on state, and the battery management system is in a stable power-on state;

[0092] Step 320: LDO2 charges the energy storage unit through the first transistor and supplies power to the wireless control module.

[0093] In one embodiment, as shown in Figure 2 and Figure 4 A power-off process of the battery management system 100 is provided by the key switch 102:

[0094] Step 402: During the power-on running process of the battery management system, the key switch is manually closed, the key switch provides a low-level signal to the control end of the second transistor, and the controller drives the flip-flop to provide a low-level signal to the second transistor;

[0095] The process of the flip-flop providing a high-level signal to the second transistor takes about 50ms;

[0096] Step 404: the controller controls the flip-flop to output a high-level signal to the control end of the second transistor for 200 ms, and then controls the indicator light to be turned off;

[0097] Step 406: the key switch is released, and the key switch provides a low-level signal to the second transistor;

[0098] Step 408: the controller and the key switch simultaneously provide a low-level signal to the control end of the second transistor, the second transistor is turned off, and the first transistor is turned off;

[0099] Step 410: the battery is disconnected from the controller, the controller and the rectification / feedback chip are powered off, and the power-off of the battery management system is completed;

[0100] Step 412: the energy storage unit provides power for the wireless control module, and the wireless control module normally operates.

[0101] In one specific embodiment, as shown in Figure 2 and Figure 5 , a power-on process of the battery management system 100 is provided by remote operation:

[0102] Step 502: the controller and the rectification / feedback chip are in a power-off state, and the wireless control module operates;

[0103] Step 504: an on command is sent to the wireless control module through a terminal device;

[0104] Step 506: the wireless control module sends a high-level signal to the control end of the second transistor;

[0105] Step 508: the input end and the output end of the second transistor are turned on, and the input end and the output end of the first transistor are turned on;

[0106] Step 510: the power supply outputs power to the controller through BUCK1, LDO1 and LDO2;

[0107] Step 512: the controller and the rectification / feedback chip are powered on;

[0108] Step 514: the controller is powered on for 2 s, and then drives the flip-flop to output a high-level signal to the control end of the second transistor;

[0109] Step 516: the high-level signals provided by the flip-flop and the key switch compete for driving, so that the second transistor remains in a conduction state;

[0110] The process of the flip-flop providing a high-level signal to the second transistor takes about 50 ms.

[0111] Step 518: The controller controls the indicator light to turn on after the trigger outputs a high level signal to the control end of the second transistor for 200 ms;

[0112] Step 520: The controller controls the wireless control module to stop sending a high level signal to the control end of the second transistor;

[0113] Step 522: The controller continuously provides a high level signal to the second transistor, so that the second transistor and the first transistor remain in the on state, and the battery management system is in a stable power-on state;

[0114] Step 524: The LDO2 charges the energy storage unit through the first transistor and supplies power to the wireless control module;

[0115] Step 526: The wireless control module sends a power-on success prompt to the terminal device.

[0116] In one embodiment, as shown in Figure 2 and Figure 6 , a power-off process of the battery management system 100 is provided by remote operation:

[0117] Step 602: During the power-on operation of the battery management system, the wireless control module is wirelessly connected with the terminal device;

[0118] Step 604: Receive the power-off instruction sent by the terminal device;

[0119] Step 606: The controller drives the trigger to provide a low level signal to the second transistor;

[0120] The process of the trigger providing a high level signal to the second transistor takes about 50 ms;

[0121] Step 608: The controller controls the indicator light to turn off after the trigger outputs a high level signal to the control end of the second transistor for 200 ms;

[0122] Step 610: The controller and the key switch simultaneously provide a low level signal to the control end of the second transistor, the second transistor is disconnected, and the first transistor is disconnected;

[0123] Step 612: The battery is disconnected from the controller, the controller and the rectification / feedback chip are powered off, and the power-off of the battery management system is completed;

[0124] Step 614: The energy storage unit provides power for the wireless control module, and the wireless control module normally operates.

[0125] In one embodiment, as shown in Figure 2 and Figure 7As shown, a power-down process in the case of a battery management system 100 failure is provided:

[0126] Step 702: the battery management system fails, and the controller provides a low-level signal to the control end of the second transistor;

[0127] Step 704: the input end and the output end of the second transistor are disconnected, so that the input end and the output end of the first transistor are disconnected, and the battery management system is powered down;

[0128] Step 706: the wireless control module sends failure information to the terminal device;

[0129] Step 708: the operator maintains the battery management system.

[0130] In the description of the present application, the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited, the terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application; the terms "connection", "installation", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0131] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0132] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery management system, characterized by, The application comprises: a key switch, a first end of the key switch being used for being connected to a battery, a second end of the key switch being grounded; a switch circuit, the switch circuit being connected to the battery and the key switch; a controller, the controller being connected to the switch circuit; wherein, in the case that the controller is not connected to the battery, the key switch is used for providing a high-level signal to the switch circuit in a closed state, so as to control the switch circuit to be turned on, so as to make the controller connected to the battery through the switch circuit; in the case that the controller is connected to the battery, the controller is used for providing a high-level signal to the switch circuit, so as to control the switch circuit to be kept on, so as to make the key switch able to be switched to an open state; in the case that the controller is connected to the battery and the key switch is switched to the closed state, the controller is used for providing a low-level signal to the switch circuit, and in the case that the key switch is switched to the open state, the key switch is used for providing a low-level signal to the switch circuit, so as to control the switch circuit to be turned off, so as to make the controller disconnected from the battery.

2. The battery management system of claim 1, wherein, The switch circuit comprises: a first transistor, an input end of the first transistor being connected to the battery, an output end of the first transistor being connected to the controller; a second transistor, an input end of the second transistor being grounded, an output end of the second transistor being connected to a control end of the first transistor, the control end of the second transistor being connected to the second end of the key switch and the controller.

3. The battery management system of claim 2, wherein, Further comprising: a flip-flop, the flip-flop being connected between the controller and the control end of the second transistor.

4. The battery management system of claim 2, wherein, The switch circuit further comprises: a first resistor, the first resistor being connected to the control end of the first transistor and the input end of the first transistor; a second resistor, the second resistor being connected to the control end of the second transistor and the input end of the second transistor.

5. The battery management system of claim 2, wherein, The switch circuit further comprises: a third resistor, the third resistor being connected to the control end of the first transistor and the output end of the second transistor.

6. The battery management system of any one of claims 1-5, wherein, Further comprising: a wireless control module, the wireless control module being connected to the switch circuit and the controller, the wireless control module being used for being wirelessly connected with a terminal device; wherein, in the case that the controller is not connected to the battery, the wireless control module is used for receiving a power-on instruction sent by the terminal device, and according to the power-on instruction, the wireless control module is used for providing a high-level signal to the switch circuit, so as to control the switch circuit to be turned on, so as to make the controller connected to the battery through the switch circuit; in the case that the controller is connected to the battery, the controller is used for providing a high-level signal to the switch circuit, so as to control the switch circuit to be kept on, so as to make the wireless control module stop providing a high-level signal to the switch circuit; in the case that the controller is connected to the battery and the battery management system is in failure, the controller is used for providing a low-level signal to the switch circuit, so as to control the switch circuit to be turned off, and the wireless control module is used for sending a failure prompt information to the terminal device. In a case that the controller is connected to the battery and the wireless control module receives the power-off instruction sent by the terminal device, the controller is configured to provide a low-level signal to the switch circuit to control the switch circuit to be turned off, so as to disconnect the controller from the battery.

7. The battery management system of claim 6, wherein, Further comprising: a storage unit, one end of the storage unit being connected to the switch circuit, and the other end of the storage unit being connected to the wireless control module; the storage unit is configured to store electric energy in a case that the switch circuit is turned on, and provide electric energy for the wireless control module in a case that the switch circuit is turned off.

8. The battery management system of claim 6, wherein, Further comprising: a voltage reduction module, an input end of the voltage reduction module being connected to the switch circuit; a first voltage stabilization module, one end of the first voltage stabilization module being connected to an output end of the voltage reduction module, and the other end of the first voltage stabilization module being connected to the controller; a second voltage stabilization module, one end of the second voltage stabilization module being connected to the output end of the voltage reduction module, and the other end of the second voltage stabilization module being connected to the wireless control module.

9. The battery management system of claim 6, wherein, Further comprising: a connection unit, the wireless control module being wirelessly connected to the terminal device through the connection unit.

10. The battery management system of any one of claims 1-5, wherein, Further comprising: a prompt unit, the prompt unit being connected to the controller; In a case that the duration that the key switch is in the closed state reaches a preset duration, the controller is configured to control the prompt unit to send a prompt information.

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