Battery protection device and control method based on battery protection device

Abstract

The invention relates to a battery protection device and a control method based on the battery protection device. The battery protection device comprises a processor, a target control switch group, a switch control module, a current acquisition module, a fly-wheel diode and an inductor, the first end of the first control switch is connected with the anode of a target battery, the second end of the first control switch is connected with the cathode of the fly-wheel diode, the anode of the fly-wheel diode is connected with one end of the inductor, the other end of the inductor is connected with the first end of the third control switch, and the second end of the third control switch is connected with the first end of the second control switch. The second end of the second control switch is connected with the anode of the fly-wheel diode, and the first end of the third control switch is connected with the cathode of the target battery; the first end of the second control switch and the first end of the first control switch are used for connecting two ends of an associated battery; the processor is used for sending a target switch control signal to the switch control module based on the target current, and the switch control module is used for controlling on-off of the switch based on the target switch control signal.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery protection device and a control method based on the battery protection device. Background Art

[0002] Since the energy of a single battery is limited, batteries are usually connected in parallel to increase the energy of a battery pack. In actual applications, there may be a voltage difference between parallel batteries or battery packs, causing one battery to charge another battery. During the charging process between batteries, there may be a problem of large charging current, which may cause damage to the battery. Summary of the invention

[0003] In view of the above-mentioned technical problems, the present disclosure proposes a battery protection device and a control method based on the battery protection device.

[0004] According to one aspect of an embodiment of the present disclosure, a battery protection device is provided, the battery protection device is arranged at a target battery, the battery protection device comprises a processor, a target control switch group, a switch control module, a current acquisition module, a freewheeling diode and an inductor; the target control switch group comprises a first control switch, a second control switch and a third control switch; the processor is connected to the switch control module and the current acquisition module respectively; The first end of the first control switch is connected to the anode of the target battery, the second end of the first control switch is connected to the cathode of the freewheeling diode, the anode of the freewheeling diode is connected to one end of the inductor, the other end of the inductor is connected to the first end of the third control switch, the second end of the third control switch is connected to the first end of the second control switch, the second end of the second control switch is connected to the anode of the freewheeling diode, and the first end of the third control switch is connected to the cathode of the target battery; the first end of the second control switch is also used to connect to one end of an associated battery, the first end of the first control switch is also used to connect to the other end of the associated battery, and the current acquisition module is used to acquire a target current flowing through the target battery; The processor is used to send a target switch control signal to the switch control module based on the target current, and the switch control module is used to control the on and off of multiple control switches in the target control switch group based on the target switch control signal.

[0005] Optionally, the device also includes a switch control component, the input end of the switch control component is connected to the first output end of the switch control module, the output end of the switch control component is connected to the first control switch, and the switch control component is used to control the third control switch to be in an on state when the switch control module outputs a pulse control signal.

[0006] Optionally, the switch control component includes a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first transistor and a second transistor, the first control switch is an N-channel field effect transistor, the first end of the first control switch is a source, the second end of the first control switch is a drain, and the third end of the first control switch is a gate; The anode of the first diode is connected to the anode of the target battery, the cathode of the first diode is connected to the anode of the third diode, the cathode of the third diode is connected to one end of the second resistor, the other end of the second resistor is connected to the third end of the first control switch, the first end of the first control switch is connected to the cathode of the second diode, the third end of the first control switch is connected to the anode of the second diode, the first resistor is connected in parallel with the second diode, the first capacitor is connected in parallel with the second diode, the first end of the second capacitor is connected to the anode of the third diode, the second end of the second capacitor is connected to one end of the fourth resistor, and the other end of the fourth resistor is grounded; The cathode of the fourth diode is connected to the second end of the second capacitor, the anode of the fourth diode is connected to the collector of the first transistor, the emitter of the first transistor is connected to one end of the third resistor, the base of the first transistor is connected to the other end of the third resistor, the emitter of the first transistor is connected to one end of the third capacitor, the other end of the third capacitor is grounded, the emitter of the first transistor is connected to a preset level end, the base of the first transistor is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the collector of the second transistor, the base of the second transistor is connected to one end of the seventh resistor, the emitter of the second transistor is connected to the other end of the seventh resistor, the base of the second transistor is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to the first output end of the switch control module, and the emitter of the second transistor is also grounded.

[0007] Optionally, the device also includes a switch protection component, which includes a fourth capacitor and a preset resistor, one end of the fourth capacitor is connected to the cathode of the freewheeling diode, the other end of the fourth capacitor is connected to one end of the preset resistor, and the other end of the preset resistor is connected to the anode of the freewheeling diode.

[0008] Optionally, the target control switch group further includes a fourth control switch, and the first end of the third control switch is connected to the cathode of the target battery through the fourth control switch.

[0009] Optionally, the current acquisition module includes a shunt, the first end of the fourth control switch is connected to the first end of the third control switch, and the second end of the fourth control switch is connected to the negative electrode of the target battery through the shunt.

[0010] Optionally, the second control switch is an N-channel field effect transistor, the first end of the second control switch is a source, the second end of the second control switch is a drain, the third end of the second control switch is a gate, and the third end of the second control switch is connected to the second output end of the switch control module; The third control switch is a complementary field effect transistor, the first end of the third control switch is a drain, the second end of the third control switch is a source, the third end of the third control switch is a gate, and the third end of the third control switch is connected to the third output end of the switch control module; The fourth control switch is a double diffused field effect transistor, the first end of the fourth control switch is a drain, the second end of the fourth control switch is a source, the third end of the fourth control switch is a gate, and the third end of the fourth control switch is connected to the fourth output end of the switch control module.

[0011] According to another aspect of an embodiment of the present disclosure, a control method based on a battery protection device is provided, the method comprising: Get the target current corresponding to the target battery; When the target current is greater than the preset current, a first switch control signal is generated so that the switch control module controls the on and off of multiple control switches in the target control switch group based on the first switch control signal; the first switch control signal is used to instruct the switch control module to control the first control switch to be turned on, control the third control switch to be turned off, and control the second control switch to be in a periodic on-off state.

[0012] Optionally, the first switch control signal includes a first control signal corresponding to the first control switch, a second control signal corresponding to the second control switch, and a third control signal corresponding to the third control switch; and generating the first switch control signal includes: Based on the target current, determining target duty cycle data; the target current is inversely proportional to the target duty cycle data; Based on the target duty cycle data, generating the second control signal, the second control signal is used to instruct the switch control module to control the second control switch to be in a periodic on-off state based on the on-off cycle corresponding to the target duty cycle data; The first preset control signal is used as the first control signal, and the second preset control signal is used as the third control signal; the first preset control signal is used to indicate that the corresponding control switch is in the on state, and the second preset control signal is used to indicate that the corresponding control switch is in the off state.

[0013] Optionally, the method further includes: When the target current is less than or equal to the preset current, a second switch control signal is generated; the second switch control signal is used to instruct the switch control module to control the first control switch to open, control the second control switch to open, and control the third control switch to close.

[0014] The technical solution provided by the embodiments of the present disclosure brings at least the following beneficial effects: The battery protection device is arranged at the target battery, and the battery protection device comprises a processor, a target control switch group, a switch control module, a current acquisition module, a freewheeling diode and an inductor. The target control switch group comprises a first control switch, a second control switch and a third control switch. The processor is connected to the switch control module and the current acquisition module respectively. The first end of the first control switch is connected to the anode of the target battery, the second end of the first control switch is connected to the cathode of the freewheeling diode, the anode of the freewheeling diode is connected to one end of the inductor, the other end of the inductor is connected to the first end of the third control switch, the second end of the third control switch is connected to the first end of the second control switch, the second end of the second control switch is connected to the anode of the freewheeling diode, the first end of the third control switch is connected to the cathode of the target battery, and the second end of the third control switch is connected to the cathode of the freewheeling diode. The first end of the control switch is also used to connect one end of the associated battery, the first end of the first control switch is also used to connect the other end of the associated battery, the current acquisition module is used to acquire the target current flowing through the target battery, the processor is used to send a target switch control signal to the switch control module based on the target current, the switch control module is used to control the on and off of multiple control switches in the target control switch group based on the target switch control signal, and the on and off of the second control switch are controlled in combination with the target current, so that the charge and discharge current of the target battery is controlled within a preset range, thereby realizing charge and discharge current limiting protection for the target battery, thereby improving the safety of the target battery; in addition, through the setting of the first control switch, the positive and negative pole connection methods of the associated battery are not restricted, that is, the target battery can all be protected by current limiting.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description are used to explain the principles of the present disclosure, and do not constitute improper limitations on the present disclosure.

[0017] Figure 1 is a block diagram of a battery protection device according to an exemplary embodiment; Figure 2 is a circuit diagram of a battery protection device according to an exemplary embodiment; Figure 3 is a flow chart showing a control method based on a battery protection device according to an exemplary embodiment; Figure 4 is a block diagram of a control device based on a battery protection device according to an exemplary embodiment; Figure 5 is a block diagram of an electronic device for implementing current limiting protection of a target battery according to an exemplary embodiment; Figure 6 is a block diagram of another electronic device for current limiting protection of a target battery according to an exemplary embodiment. DETAILED DESCRIPTION

[0018] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0019] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0020] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0021] See also Figure 1 and Figure 2 , Figure 1 is a block diagram of a battery protection device according to an exemplary embodiment. Figure 2 FIG. 1 is a circuit diagram of a battery protection device according to an exemplary embodiment. Specifically, Figure 1As shown, the battery protection device can be set in the target battery, and the battery protection device may include a processor, a target control switch group, a switch control module, a current acquisition module, a freewheeling diode DF and an inductor L; the target control switch group may include a first control switch, a second control switch and a third control switch; the processor may be connected to the switch control module and the current acquisition module respectively; the first end of the first control switch may be connected to the anode of the target battery, the second end of the first control switch may be connected to the cathode of the freewheeling diode DF, the anode of the freewheeling diode DF may be connected to one end of the inductor L, the other end of the inductor L may be connected to the first end of the third control switch, and the third The second end of the control switch can be connected to the first end of the second control switch, the second end of the second control switch can be connected to the positive electrode of the freewheeling diode DF, and the first end of the third control switch can be connected to the cathode of the target battery; the first end of the second control switch can also be used to connect one end of the associated battery, the first end of the first control switch can also be used to connect the other end of the associated battery, and the current acquisition module can be used to acquire the target current flowing through the target battery; the processor can be used to send a target switch control signal to the switch control module based on the target current, and the switch control module can be used to control the on and off of multiple control switches in the target control switch group based on the target switch control signal.

[0022] In a specific embodiment, the target battery may refer to a battery that currently needs to be protected. The associated battery may refer to any battery connected in parallel with the target battery.

[0023] In a specific embodiment, the target switch control signal can be used to instruct the switch control module to implement the on-off operation control of each switch in the target control switch group. Specifically, the target switch control signal may include a first switch control signal or a second switch control signal. Among them, the first switch control signal can be used to instruct the switch control module to control the first control switch to be turned on, and the third control switch to be turned off, and the second control switch to be in a periodic on-off state. The second switch control signal can be used to instruct the switch control module to control the first control switch to be turned off, and the second control switch to be turned off, and the third control switch to be turned on.

[0024] In the above embodiment, the on and off of the second control switch is controlled in combination with the target current, so that the charge and discharge current of the target battery is controlled within a preset range, thereby realizing the charge and discharge current limiting protection for the target battery, thereby improving the safety of the target battery; in addition, the setting of the first control switch makes the connection method of the positive and negative electrodes of the associated battery unrestricted, that is, the target battery can all be protected by current limiting.

[0025] In a specific embodiment, the battery protection device may further include a switch control component, the input end of the switch control component may be connected to the first output end of the switch control module, the output end of the switch control component may be connected to the first control switch, and the switch control component may be used to control the third control switch to be in an on state when the switch control module outputs a pulse control signal.

[0026] In a specific embodiment, Figure 2 As shown, the switch control component may include a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first transistor Q1, and a second transistor Q2. Specifically, as Figure 2 As shown, the first control switch may be an N-channel field effect transistor, the first end of the first control switch may be a source, the second end of the first control switch may be a drain, and the third end of the first control switch may be a gate; the anode of the first diode may be connected to the anode of the target battery, the cathode of the first diode may be connected to the anode of the third diode, the cathode of the third diode may be connected to one end of the second resistor, the other end of the second resistor may be connected to the third end of the first control switch, the first end of the first control switch may be connected to the cathode of the second diode, the third end of the first control switch may be connected to the anode of the second diode, the first resistor may be connected in parallel with the second diode, the first capacitor may be connected in parallel with the second diode, the first end of the second capacitor may be connected to the anode of the third diode, the second end of the second capacitor may be connected to one end of the fourth resistor, and the other end of the fourth resistor may be grounded; the fourth The cathode of the diode can be connected to the second end of the second capacitor, the anode of the fourth diode can be connected to the collector of the first transistor, the emitter of the first transistor can be connected to one end of the third resistor, the base of the first transistor can be connected to the other end of the third resistor, the emitter of the first transistor can be connected to one end of the third capacitor, the other end of the third capacitor can be grounded, the emitter of the first transistor can be connected to the preset level end, the base of the first transistor can be connected to one end of the fifth resistor, the other end of the fifth resistor can be connected to the collector of the second transistor, the base of the second transistor can be connected to one end of the seventh resistor, the emitter of the second transistor can be connected to the other end of the seventh resistor, the base of the second transistor can be connected to one end of the sixth resistor, the other end of the sixth resistor can be connected to the first output end of the switch control module, and the emitter of the second transistor can also be grounded.

[0027] In a specific embodiment, the switch control module can output a pulse width modulation signal through the first output terminal when receiving the first switch control signal; the preset level can be provided through the preset level terminal, so that the second capacitor can be charged to the above-mentioned preset level voltage, and then combined with the high and low level signals provided by the pulse width modulation signal, the preset level voltage on the second capacitor can be transferred to the first capacitor, that is, the first capacitor is gradually charged to the preset level voltage; when the first capacitor is charged to the preset level voltage, the voltage difference between the gate and the source of the first control switch is greater than the preset conduction voltage, and the source and drain of the first control switch are turned on. Specifically, the preset conduction voltage can be 8V.

[0028] In the above embodiment, when the first output terminal continuously outputs a pulse width modulation signal, the first control switch can remain in the on state, and the first control switch is an N-channel field effect transistor, that is, only one N-channel field effect transistor is required, and combined with the switch control component, the first control switch can be continuously turned on during the target battery current limiting process, and there is no need to set an isolation device, which is low in cost.

[0029] In a specific embodiment, the battery protection device may further include a switch protection component, such as Figure 2 As shown, the switch protection component may include a fourth capacitor C4 and a preset resistor R22. Specifically, one end of the fourth capacitor may be connected to the cathode of the freewheeling diode, the other end of the fourth capacitor may be connected to one end of the preset resistor, and the other end of the preset resistor may be connected to the anode of the freewheeling diode.

[0030] In the above embodiment, the switch protection component composed of the fourth capacitor and the preset resistor can effectively absorb the spike generated by the second control switch during switch switching, reduce the DS voltage spike of the second control switch, and make it work more safely and reliably.

[0031] In a specific embodiment, the target control switch group may further include a fourth control switch, and the first end of the third control switch may be connected to the cathode of the target battery through the fourth control switch.

[0032] In a specific embodiment, the current acquisition module may include a shunt, the first end of the fourth control switch may be connected to the first end of the third control switch, and the second end of the fourth control switch may be connected to the negative electrode of the target battery through the shunt.

[0033] In the above embodiment, the target current flowing through the target battery can be collected by the shunt in the current collection module, so that the current limiting protection of the target battery can be achieved through the collected target current.

[0034] In a specific embodiment, Figure 2As shown, the second control switch can be an N-channel field effect transistor, the first end of the second control switch can be a source, the second end of the second control switch can be a drain, the third end of the second control switch can be a gate, and the third end of the second control switch can be connected to the second output end of the switch control module. Specifically, the switch control module can include a first drive control unit, and the first drive control unit can be used to control the second control switch to quickly turn on or off.

[0035] In a specific embodiment, Figure 2 As shown, the third control switch can be a complementary field effect transistor, the first end of the third control switch can be a drain, the second end of the third control switch can be a source, the third end of the third control switch can be a gate, and the third end of the third control switch can be connected to the third output end of the switch control module. Specifically, the switch control module can include a second drive control unit, and the second drive control unit can be used to control the third control switch to quickly turn on or off.

[0036] In a specific embodiment, Figure 2 As shown, the fourth control switch can be a double diffused field effect transistor, the first end of the fourth control switch can be a drain, the second end of the fourth control switch can be a source, the third end of the fourth control switch can be a gate, and the third end of the fourth control switch can be connected to the fourth output end of the switch control module. Specifically, the switch control module can include a third drive control unit, and the third drive control unit can be used to control the fourth control switch to quickly turn on or off.

[0037] In the above embodiment, the battery protection device is arranged at the target battery, and the battery protection device includes a processor, a target control switch group, a switch control module, a current acquisition module, a freewheeling diode and an inductor. The target control switch group includes a first control switch, a second control switch and a third control switch. The processor is connected to the switch control module and the current acquisition module respectively. The first end of the first control switch is connected to the anode of the target battery, the second end of the first control switch is connected to the cathode of the freewheeling diode, the anode of the freewheeling diode is connected to one end of the inductor, the other end of the inductor is connected to the first end of the third control switch, the second end of the third control switch is connected to the first end of the second control switch, and the second end of the second control switch is connected to the freewheeling diode. The first end of the third control switch is connected to the cathode of the target battery, the first end of the second control switch is also used to connect one end of the associated battery, the first end of the first control switch is also used to connect the other end of the associated battery, the current acquisition module is used to acquire the target current flowing through the target battery, the processor is used to send a target switch control signal to the switch control module based on the target current, the switch control module is used to control the on and off of multiple control switches in the target control switch group based on the target switch control signal, and the on and off of the second control switch is controlled in combination with the target current, so that the charge and discharge current of the target battery is controlled within a preset range, thereby realizing the charge and discharge current limiting protection for the target battery, thereby improving the safety of the target battery.

[0038] Specifically, Figure 3 FIG. 1 is a flow chart showing a control method based on a battery protection device according to an exemplary embodiment. Figure 3 As shown, the control method based on the battery protection device can be used in electronic devices such as terminals or servers. Taking the control method based on the battery protection device applied to the above processor as an example, it can specifically include the following steps: S301: Obtain a target current corresponding to a target battery.

[0039] In a specific embodiment, the target current may refer to the current currently flowing through the target battery. Specifically, the target current may be obtained by performing current acquisition through the current acquisition module.

[0040] S303: When the target current is greater than the preset current, generate a first switch control signal, so that the switch control module controls the on and off of multiple control switches in the target control switch group based on the first switch control signal.

[0041] In a specific embodiment, the preset current can be set according to actual application needs, which is not limited in the present disclosure. For example, the preset current can be 10A.

[0042] In a specific embodiment, the first switch control signal can be used to instruct the switch control module to control the first control switch to be turned on, and to control the third control switch to be turned off, and to control the second control switch to be in a periodic on-off state. The periodic on-off state can refer to the state in which the corresponding switch is intermittently opened or closed. Further, when the control switch is in the periodic on-off state, the frequency of switching between opening and closing can be controlled by its corresponding on-off cycle.

[0043] In a specific embodiment, the first switch control signal may include a first control signal corresponding to the first control switch, a second control signal corresponding to the second control switch, and a third control signal corresponding to the third control switch. The first control signal may be used to control the first control switch. The second control signal may be used to control the second control switch. The third control signal may be used to control the third control switch.

[0044] In a specific embodiment, the generating of the first switch control signal may include: Based on the target current, determining target duty cycle data; generating a second control signal based on the target duty cycle data; The first preset control signal is used as the first control signal, and the second preset control signal is used as the third control signal.

[0045] In a specific embodiment, the target duty cycle data may represent the duty cycle of the target pulse width signal to be generated, wherein the target pulse width signal may refer to a signal outputted by the second output terminal of the switch control module.

[0046] In a specific embodiment, the larger the target current is, the smaller the target duty cycle data may be; correspondingly, the smaller the target current is, the larger the target duty cycle data may be. That is, the target current and the target duty cycle data may be inversely proportional.

[0047] In a specific embodiment, the second control signal may be used to instruct the switch control module to control the second control switch to be in a periodic on-off state based on the on-off cycle corresponding to the target duty cycle data.

[0048] In a specific embodiment, the first preset control signal may be used to indicate that the corresponding control switch is in the on state. It is understandable that when any control switch is in the on state, it may refer to that the source and drain of the control switch are in conduction.

[0049] In a specific embodiment, the second preset control signal may be used to indicate that the corresponding control switch is in an off state.

[0050] In a specific embodiment, the first switch control signal may further include a fourth control signal corresponding to the fourth control switch. Specifically, when the target current is greater than the preset current, the first preset control signal may be used as the fourth control signal.

[0051] In a specific embodiment, when the voltage of the associated battery is higher than the voltage of the target battery, the associated battery will charge the target battery, and the target current can be collected by the current acquisition module. When the target current is greater than the preset current, the fourth control switch is controlled to be closed, the third control switch is disconnected, and the associated battery can charge the target battery through the inductor; when the second control switch is turned on, the inductor converts the electrical energy into magnetic energy and stores it; when the second control switch is turned off, the inductor converts the magnetic energy into electrical energy and releases the electrical energy through the freewheeling diode; further, by adjusting the target duty cycle data, the target current can be adjusted to within a preset range. Among them, the preset range can refer to a current range that is safe for the target battery.

[0052] In a specific embodiment, the above method may further include: When the target current is less than or equal to the preset current, a second switch control signal is generated.

[0053] In a specific embodiment, the second switch control signal can be used to instruct the switch control module to control the first control switch to be opened, control the second control switch to be opened, and control the third control switch to be closed.

[0054] In a specific embodiment, the second switch control signal can also be used to instruct the switch control module to control the first control switch to open, control the second control switch to open, control the third control switch to close, and control the fourth control switch to close.

[0055] In the above embodiment, when the target current is greater than the preset current, a first switch control signal is generated so that the switch control module controls the on and off of multiple control switches in the target control switch group based on the first switch control signal, so that the charge and discharge current of the target battery can be controlled within a preset range, thereby realizing charge and discharge current limiting protection for the target battery, thereby improving the safety of the target battery.

[0056] Figure 4 is a block diagram of a control device based on a battery protection device according to an exemplary embodiment. Specifically, Figure 4 As shown, the device may include: The current acquisition module 410 may be used to acquire a target current corresponding to a target battery; The first signal generating module 420 can be used to generate a first switch control signal when the target current is greater than the preset current, so that the switch control module controls the on and off of multiple control switches in the target control switch group based on the first switch control signal; the first switch control signal is used to instruct the switch control module to control the first control switch to be turned on, control the third control switch to be turned off, and control the second control switch to be in a periodic on-off state.

[0057] In a specific embodiment, the first signal generating module 420 may include: The duty cycle determination module can be used to determine target duty cycle data based on the target current; the target current is inversely proportional to the target duty cycle data; A second signal generating module may be used to generate a second control signal based on the target duty cycle data, the second control signal being used to instruct the switch control module to control the second control switch to be in a periodic on-off state based on the on-off cycle corresponding to the target duty cycle data; The third signal generating module can be used to use the first preset control signal as the first control signal and the second preset control signal as the third control signal; the first preset control signal is used to indicate that the corresponding control switch is in the on state, and the second preset control signal is used to indicate that the corresponding control switch is in the off state.

[0058] In a specific embodiment, the control device based on the battery protection device may further include: The fourth signal generating module can be used to generate a second switch control signal when the target current is less than or equal to the preset current; the second switch control signal is used to instruct the switch control module to control the first control switch to open, control the second control switch to open, and control the third control switch to close.

[0059] Regarding the device in the above embodiment, the specific manner in which each module and unit performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0060] Figure 5 is a block diagram of an electronic device for implementing current limiting protection of a target battery according to an exemplary embodiment. The electronic device may be a server, and its internal structure diagram may be as shown in FIG. Figure 5As shown. The electronic device includes a processor, a memory and a network interface connected via a system bus. The processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the electronic device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a control method based on a battery protection device is implemented.

[0061] Figure 6 is a block diagram of another electronic device for current limiting protection of a target battery according to an exemplary embodiment. The electronic device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 6 As shown. The electronic device includes a processor, a memory, a network interface, a display screen and an input device connected via a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the electronic device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a control method based on a battery protection device is implemented. The display screen of the electronic device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the housing of the electronic device, or an external keyboard, touchpad or mouse, etc.

[0062] Those skilled in the art will understand that Figure 5 or Figure 6 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present disclosure, and does not constitute a limitation on the electronic device to which the scheme of the present disclosure is applied. The specific electronic device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0063] In an exemplary embodiment, an electronic device is also provided, including: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement a control method based on a battery protection device as in an embodiment of the present disclosure.

[0064] In an exemplary embodiment, a computer-readable storage medium is also provided. When instructions in the storage medium are executed by a processor of an electronic device, the electronic device can execute the control method based on the battery protection device in the embodiment of the present disclosure.

[0065] In an exemplary embodiment, a computer program product including instructions is also provided. When the computer program product is run on a computer, the computer is enabled to execute the control method based on the battery protection device in the embodiment of the present disclosure.

[0066] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0067] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0068] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery protection device, characterized in that: The battery protection device is arranged on the target battery, and comprises a processor, a target control switch group, a switch control module, a current acquisition module, a freewheeling diode and an inductor; the target control switch group comprises a first control switch, a second control switch and a third control switch; the processor is connected to the switch control module and the current acquisition module respectively; The first end of the first control switch is connected to the anode of the target battery, the second end of the first control switch is connected to the cathode of the freewheeling diode, the anode of the freewheeling diode is connected to one end of the inductor, the other end of the inductor is connected to the first end of the third control switch, the second end of the third control switch is connected to the first end of the second control switch, the second end of the second control switch is connected to the anode of the freewheeling diode, and the first end of the third control switch is connected to the cathode of the target battery; the first end of the second control switch is also used to connect to one end of an associated battery, the first end of the first control switch is also used to connect to the other end of the associated battery, and the current acquisition module is used to acquire a target current flowing through the target battery; The processor is used to send a target switch control signal to the switch control module based on the target current, and the switch control module is used to control the on and off of multiple control switches in the target control switch group based on the target switch control signal.

2. The device according to claim 1, characterized in that The device also includes a switch control component, the input end of the switch control component is connected to the first output end of the switch control module, the output end of the switch control component is connected to the first control switch, and the switch control component is used to control the third control switch to be in an on state when the switch control module outputs a pulse control signal.

3. The device according to claim 2, characterized in that The switch control component includes a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first transistor and a second transistor, the first control switch is an N-channel field effect transistor, the first end of the first control switch is a source, the second end of the first control switch is a drain, and the third end of the first control switch is a gate; The anode of the first diode is connected to the anode of the target battery, the cathode of the first diode is connected to the anode of the third diode, the cathode of the third diode is connected to one end of the second resistor, the other end of the second resistor is connected to the third end of the first control switch, the first end of the first control switch is connected to the cathode of the second diode, the third end of the first control switch is connected to the anode of the second diode, the first resistor is connected in parallel with the second diode, the first capacitor is connected in parallel with the second diode, the first end of the second capacitor is connected to the anode of the third diode, the second end of the second capacitor is connected to one end of the fourth resistor, and the other end of the fourth resistor is grounded; The cathode of the fourth diode is connected to the second end of the second capacitor, the anode of the fourth diode is connected to the collector of the first transistor, the emitter of the first transistor is connected to one end of the third resistor, the base of the first transistor is connected to the other end of the third resistor, the emitter of the first transistor is connected to one end of the third capacitor, the other end of the third capacitor is grounded, the emitter of the first transistor is connected to a preset level end, the base of the first transistor is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the collector of the second transistor, the base of the second transistor is connected to one end of the seventh resistor, the emitter of the second transistor is connected to the other end of the seventh resistor, the base of the second transistor is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to the first output end of the switch control module, and the emitter of the second transistor is also grounded.

4. The device according to claim 1, characterized in that The device also includes a switch protection component, which includes a fourth capacitor and a preset resistor, one end of the fourth capacitor is connected to the cathode of the freewheeling diode, the other end of the fourth capacitor is connected to one end of the preset resistor, and the other end of the preset resistor is connected to the anode of the freewheeling diode.

5. The device according to claim 1, characterized in that The target control switch group further includes a fourth control switch, and the first end of the third control switch is connected to the cathode of the target battery through the fourth control switch.

6. The device according to claim 5, characterized in that The current acquisition module includes a shunt, a first end of the fourth control switch is connected to a first end of the third control switch, and a second end of the fourth control switch is connected to a negative electrode of the target battery through the shunt.

7. The device according to claim 6, characterized in that The second control switch is an N-channel field effect transistor, the first end of the second control switch is a source, the second end of the second control switch is a drain, the third end of the second control switch is a gate, and the third end of the second control switch is connected to the second output end of the switch control module; The third control switch is a complementary field effect transistor, the first end of the third control switch is a drain, the second end of the third control switch is a source, the third end of the third control switch is a gate, and the third end of the third control switch is connected to the third output end of the switch control module; The fourth control switch is a double diffused field effect transistor, the first end of the fourth control switch is a drain, the second end of the fourth control switch is a source, the third end of the fourth control switch is a gate, and the third end of the fourth control switch is connected to the fourth output end of the switch control module.

8. A control method based on a battery protection device, characterized in that: The method comprises: Get the target current corresponding to the target battery; When the target current is greater than the preset current, a first switch control signal is generated so that the switch control module controls the on and off of multiple control switches in the target control switch group based on the first switch control signal; the first switch control signal is used to instruct the switch control module to control the first control switch to be turned on, control the third control switch to be turned off, and control the second control switch to be in a periodic on-off state.

9. The method according to claim 8, characterized in that The first switch control signal includes a first control signal corresponding to the first control switch, a second control signal corresponding to the second control switch, and a third control signal corresponding to the third control switch; The generating of the first switch control signal comprises: Based on the target current, determining target duty cycle data; the target current is inversely proportional to the target duty cycle data; Based on the target duty cycle data, generating the second control signal, the second control signal is used to instruct the switch control module to control the second control switch to be in a periodic on-off state based on the on-off cycle corresponding to the target duty cycle data; The first preset control signal is used as the first control signal, and the second preset control signal is used as the third control signal; the first preset control signal is used to indicate that the corresponding control switch is in the on state, and the second preset control signal is used to indicate that the corresponding control switch is in the off state.

10. The method according to claim 8, characterized in that The method further comprises: When the target current is less than or equal to the preset current, a second switch control signal is generated; the second switch control signal is used to instruct the switch control module to control the first control switch to open, control the second control switch to open, and control the third control switch to close.

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