Power supply system, power supply method thereof and vehicle

Abstract

The embodiment of the invention discloses a power supply system, a power supply method thereof and a vehicle, at least two power supply branches are arranged, under the condition that at least one switch module is switched on, a power supply can supply power to a load through the switch module, and dual-power-supply or multi-power-supply power supply is achieved. A corresponding redundant module does not need to be arranged for each circuit module in the power supply system, so that the circuit scale and cost of the power supply system are reduced. The power supply system further comprises a detection module and a control module, a voltage signal and / or a current signal in the power supply system are / is detected through the detection module, and after the control module sends a conduction control signal to the switch module, whether the switch module is normally conducted or not is determined based on the voltage signal and / or the current signal, and then whether the switch module works normally or not is determined. When power is supplied to the load, the switch module capable of working normally can be controlled to be switched on to supply power to the load, so that the power supply reliability is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a power supply system and a power supply method thereof, and a vehicle. Background Art

[0002] With the development of vehicle technology, users have higher and higher requirements on the reliability of power supply systems in vehicles.

[0003] In the prior art, when a single power supply is used in a vehicle, the controller may become uncontrollable when the power supply fails. In particular, for a brake control power supply system, if a single power supply is used, a safety accident may occur when the power supply fails. When a dual power supply is used in a vehicle, the circuit scale and cost are greatly increased. Summary of the invention

[0004] The present invention provides a power supply system and a power supply method thereof, and a vehicle, so as to reduce the circuit scale and cost of the power supply system and ensure power supply reliability on the basis of realizing dual power supply.

[0005] According to one aspect of the present invention, there is provided a power supply system, comprising: at least two power supply branches, a control module and a detection module;

[0006] The power supply branch includes a power input terminal, a power output terminal and a switch module connected between the power input terminal and the power output terminal; the power input terminal is used to connect the power supply, and the power output terminal is used to connect the load;

[0007] The detection module is used to detect a voltage signal and / or a current signal in the power supply system, the voltage signal includes a power supply voltage of the power supply and a load voltage of the load; the current signal includes a current in the power supply branch;

[0008] The control module is electrically connected to the switch module and the detection module respectively. The control module is used to send a conduction control signal to at least one switch module, and when it is determined based on the voltage signal and / or the current signal that at least one switch module is working normally, control at least one switch module to conduct to supply power to the load.

[0009] Optionally, the detection module includes at least two power supply voltage detection units and a load voltage detection unit; the power supply voltage detection unit is electrically connected to the power supply branch correspondingly and is used to detect the power supply voltage of the power supply branch, and the load voltage detection unit is used to detect the load voltage of the load;

[0010] The control module is used to send a control signal to a switch module after the power supply system is powered on, and determine whether the switch module is working normally according to the power supply voltage of the power supply branch where the switch module is located and the magnitude relationship of the load voltage.

[0011] Optionally, the detection module further includes at least two current detection units, which are arranged in the power supply branch and are used to detect the current of the power supply branch;

[0012] The control module is used to send a conduction control signal to the switch module of the set power supply branch after the system is powered on, and after determining that the switch module of the set power supply branch is working normally, control the switch module in the set power supply branch to remain on, and send a conduction control signal to the switch module of the non-set power supply branch; wherein the set power supply branch is the power supply branch with the largest power supply voltage;

[0013] The control module is also used to determine whether the switch module in the non-set power supply branch is working normally according to the current of the non-set power supply branch.

[0014] Optionally, the power supply system further includes a driving module, which is electrically connected to the control module and the switch module respectively, and the control module is used to drive the switch module to be turned on or off through the driving module.

[0015] Optionally, the switch module includes a semiconductor field effect transistor.

[0016] According to another aspect of the present invention, a power supply method of a power supply system is provided, which is applied to the power supply system of any embodiment of the present invention, and the power supply method includes:

[0017] After sending a conduction control signal to at least one switch module, when it is determined according to the voltage signal and / or the current signal that at least one switch module is operating normally, the at least one switch module is controlled to conduct to supply power to the load.

[0018] Optionally, after sending a conduction control signal to at least one switch module, when it is determined according to the voltage signal and / or the current signal that at least one switch module is operating normally, controlling at least one switch module to conduct to supply power to the load includes:

[0019] After the power supply system is powered on, the power supply branch with the largest power supply voltage is determined as the set power supply branch, and the other power supply branches are non-set power supply branches;

[0020] Sending a conduction control signal to a switch module of a set power supply branch;

[0021] Determine whether the switch module of the set power supply branch is operating normally according to the power supply voltage and load voltage of the set power supply branch;

[0022] If yes, while controlling the switch module in the set power supply branch to remain on, a conduction control signal is sent to the switch module of the non-set power supply branch;

[0023] Determining whether the switch module of the non-set power supply branch is operating normally according to the current to the non-set power supply branch;

[0024] When the switch modules of the non-set power supply branches are operating normally, at least one switch module is controlled to be turned on to supply power to the load;

[0025] When the switch module of the non-set power supply branch does not work normally, the switch module of the set power supply branch is controlled to be turned on to supply power to the load.

[0026] Optionally, determining whether a switch module of a set power supply branch operates normally according to a power supply voltage and a load voltage of the set power supply branch includes:

[0027] If the power supply voltage and the load voltage of the set power supply branch are less than the set voltage threshold, it is determined that the switch module of the set power supply branch is operating normally;

[0028] If the power supply voltage and the load voltage of the set power supply branch are greater than or equal to the set voltage threshold, it is determined that the switch module of the set power supply branch is not working properly;

[0029] And / or, determining whether a switch module of a non-set power supply branch is operating normally according to a current to the non-set power supply branch, including:

[0030] If a current flows from the power output end to the power input end in the presence of a non-set power supply branch, it is determined that the switch module of the non-set power supply branch is operating normally;

[0031] If there is no current flowing from the power output end to the power input end of the non-set power supply branch, it is determined that the switch module of the non-set power supply branch is not working normally.

[0032] Optionally, after sending a conduction control signal to at least one switch module, when it is determined according to the voltage signal and / or the current signal that at least one switch module is operating normally, controlling at least one switch module to conduct to supply power to the load includes:

[0033] After sending a conduction control signal to at least one switch module, when it is determined that at least one switch module is working normally based on the voltage signal and / or the current signal, the switch module in the power supply branch corresponding to the maximum power supply voltage in the power supply branch corresponding to the normally working switch module is controlled to be turned on to supply power to the load.

[0034] According to another aspect of the present invention, a vehicle is provided, comprising a power supply system according to any embodiment of the present invention, wherein a load of the power supply system comprises an electronic induction braking system and a driving circuit and a control circuit of the electronic induction braking system.

[0035] The power supply system and power supply method and vehicle of the embodiment of the present invention are provided with at least two power supply branches. When at least one switch module is turned on, the power supply can supply power to the load through the switch module, thereby realizing dual power supply or multi-power supply. There is no need to set a corresponding redundant module for each circuit module in the power supply system, so that the circuit scale and cost of the power supply system are reduced. The power supply system also includes a detection module and a control module. The detection module detects the voltage signal and / or current signal in the power supply system. After the control module sends a conduction control signal to the switch module, it determines whether the switch module is normally turned on based on the voltage signal and / or current signal, and then determines whether the switch module is working normally. When supplying power to the load, the switch module that can work normally can be controlled to be turned on to supply power to the load, thereby ensuring the reliability of power supply.

[0036] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 is a structural schematic diagram of a power supply system provided by an embodiment of the present invention;

[0039] Figure 2 is a structural schematic diagram of another power supply system provided by an embodiment of the present invention;

[0040] Figure 3 is a structural schematic diagram of another power supply system provided by an embodiment of the present invention;

[0041] Figure 4 is a flow chart of a power supply method of a power supply system provided by an embodiment of the present invention;

[0042] Figure 5 is a flow chart of another power supply method of a power supply system provided by an embodiment of the present invention;

[0043] Figure 6 is a flow chart of another power supply method of a power supply system provided by an embodiment of the present invention;

[0044] Figure 7 It is a structural schematic diagram of a vehicle provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] Figure 1 is a schematic diagram of a power supply system provided by an embodiment of the present invention, with reference to Figure 1 The power supply system includes at least two power supply branches 110, a control module 120 and a detection module 130; the power supply branch 110 includes a power input terminal A1, a power output terminal B1 and a switch module 111 connected between the power input terminal A1 and the power output terminal B1; the power input terminal A1 is used to connect the power supply 200, and the power output terminal B1 is used to connect the load 300; the detection module 130 is used to detect the voltage signal and / or current signal in the power supply system, the voltage signal includes the power supply voltage of the power supply 200 and the load voltage of the load 300; the current signal includes the current in the power supply branch 110; the control module 120 is electrically connected to the switch module 111 and the detection module 130 respectively, and the control module 120 is used to send a conduction control signal to at least one switch module 111, and when it is determined that at least one switch module 111 is working normally according to the voltage signal and / or current signal, control at least one switch module 111 to be turned on to supply power to the load 300.

[0048] Among them, the power supply system includes at least two power supply branches 110, and the power supply branch 110 is connected to the power supply 200 through the power input terminal A1, and the power supply 200 includes but is not limited to a battery. The power supply system realizes dual power supply or multi-power supply through at least two power supply branches 110. The power supply branch 110 includes a switch module 111. When the switch module 111 is turned on, the power supply 200 can supply power to the load 300 connected to the power supply branch 110 through the switch module 111. In this embodiment, dual power supply or multi-power supply can be realized by at least two power supply branches 110 including the switch module 111, and there is no need to set a corresponding redundant module for each circuit module in the power supply system, so that the circuit scale and cost of the power supply system are reduced. Exemplarily, in the prior art, for the brake system of the vehicle, when dual power supply is used for power supply, a complete set of inverter systems are usually added, including the power supply 200, the electronic induction brake system (Sensotronic Brake Control, SBC), the drive circuit and control circuit for the SBC, etc., so that the circuit scale of the power supply system is large and the cost is high. In this embodiment, the power supply system includes at least two power supply branches 110. For the electronic induction brake system (Sensotronic Brake Control, SBC), the drive circuit and the control circuit of the SBC do not need to be redundantly set, so that the circuit scale of the power supply system is small and the cost is low. Optionally, the load 300 connected to the power output terminal B1 of different power supply branches 110 is the same.

[0049] The power supply system is also provided with a detection module 130, which can detect a voltage signal and / or a current signal in the power supply system. The voltage signal includes a power supply voltage and a load voltage, and the current signal includes a current in the power supply branch 110. The control module 120 is electrically connected to the detection module 130, and after sending a conduction control signal for controlling the conduction of the switch module 111 to the switch module 111, it can determine whether the switch module 111 is normally conducted based on the voltage signal and / or the current signal, and then determine whether the switch module 111 is working normally. The control module 120 includes but is not limited to a single-chip microcomputer. When supplying power to the load 300, at least one switch module 111 that can work normally can be controlled to be conducted to supply power to the load 300, thereby ensuring the reliability of power supply. Optionally, when it is determined that at least one switch module 111 is working normally, one of the switch modules 111 that can work normally is controlled to be conducted, thereby supplying power to the load 300.

[0050] Optionally, a conduction control signal is sent to the switch module 111 in each power supply branch 110 in sequence, and the time periods for sending the conduction control signal to the switch modules 111 in different power supply branches 110 are different. In an optional embodiment, after sending the conduction control signal to the switch module 111 in a power supply branch 110, it is determined whether the switch module 111 is normally turned on according to the power supply voltage and the load voltage of the power supply branch 110. For each power supply branch 110, the above method can be used to determine whether the switch module 111 is working normally. In another optional embodiment, after sending the conduction control signal to the switch module 111 in a power supply branch 110, it can be determined whether the switch module 111 is working normally according to whether the current of the power supply branch 110 reaches a set current threshold. For example, after sending the conduction control signal to the switch module 111 in a power supply branch 110, according to the current of the power supply branch 110 being greater than or equal to the set current threshold, it is indicated that the switch module 111 in the power supply branch 110 is working normally. The set current threshold is greater than 0. For each power supply branch 110, the above method can be used to determine whether the switch module 111 works normally. In other optional embodiments of the present invention, other methods can also be used to determine whether the switch module 111 in the power supply branch 110 works normally, which is not specifically limited in the embodiment of the present invention.

[0051] The power supply system of this embodiment is provided with at least two power supply branches. When at least one switch module is turned on, the power supply can supply power to the load through the switch module, thereby realizing dual power supply or multi-power supply. There is no need to set a corresponding redundant module for each circuit module in the power supply system, so that the circuit scale and cost of the power supply system are reduced. The power supply system also includes a detection module and a control module. The detection module detects the voltage signal and / or current signal in the power supply system. After the control module sends a conduction control signal to the switch module, it determines whether the switch module is normally turned on based on the voltage signal and / or current signal, and then determines whether the switch module is working normally. When supplying power to the load, the switch module that can work normally can be controlled to be turned on to supply power to the load, thereby ensuring the reliability of power supply.

[0052] Figure 2 is a schematic diagram of another power supply system provided by an embodiment of the present invention, referring to Figure 2Optionally, the detection module includes at least two power supply voltage detection units 131 and a load voltage detection unit 132; the power supply voltage detection unit 131 is electrically connected to the power supply branch 110 and is used to detect the power supply voltage of the power supply branch 110, and the load voltage detection unit 132 is used to detect the load voltage of the load 300; the control module 120 is used to send a control signal to a switch module 111 after the power supply system is powered on, and determine whether the switch module 111 is working normally according to the power supply voltage of the power supply branch 110 where the switch module 111 is located, and the magnitude relationship of the load voltage.

[0053] Optionally, the power supply voltage detection unit 131 is in a one-to-one correspondence with the power supply branch 110, and the power supply voltage detection unit 131 is used to detect the power supply voltage of the corresponding power supply branch 110. In the case where the load 300 connected to the power output terminal B1 of each power supply branch 110 is the same, the power supply system may include a load voltage detection unit 132 to detect the load voltage. After the control module 120 sends a conduction control signal to a switch module 111, if the switch module 111 can work normally and the switch module 111 can be turned on, the difference between the power supply voltage and the load voltage of the power supply branch 110 where the switch module 111 is located will be within a certain range; if the switch module 111 cannot work normally, for example, the switch module 111 cannot be turned on normally, the load voltage will be much smaller than the power supply voltage. Optionally, after sending a control signal to a switch module 111, it is determined whether the switch module 111 is working normally according to the power supply voltage of the power supply branch 110 where the switch module 111 is located, and the relationship between the difference in the load voltage and the set voltage threshold. Exemplarily, if after sending a control signal to a switch module 111, the power supply voltage and the load voltage of the power supply branch 110 where the switch module 111 is located are less than the set voltage threshold, it is determined that the switch module 111 of the set power supply branch is working normally; if the power supply voltage and the load voltage of the power supply branch 110 where the switch module 111 is located are greater than or equal to the set voltage threshold, it is determined that the switch module 111 of the set power supply branch is not working normally. The set voltage threshold can be set according to actual needs. Optionally, the set voltage threshold is greater than the difference between the power supply branch 110 and the load voltage under the condition that the switch of each power supply branch 110 is working normally.

[0054] Figure 3 is a schematic diagram of another power supply system provided by an embodiment of the present invention, referring to Figure 3Optionally, the detection module 130 also includes at least two current detection units 133, which are arranged in the power supply branch 110 and are used to detect the current of the power supply branch 110; the control module 120 is used to send a conduction control signal to the switch module 111 of the set power supply branch after the system is powered on, and after determining that the switch module 111 of the set power supply branch is working normally, control the switch module 111 in the set power supply branch to remain turned on, and send a conduction control signal to the switch module 111 of the non-set power supply branch; wherein the set power supply branch is the power supply branch 110 with the largest power supply voltage; the control module 120 is also used to determine whether the switch module 111 in the non-set power supply branch is working normally according to the current of the non-set power supply branch.

[0055] Optionally, the current detection unit 133 corresponds to the power supply branch 110 one by one, and the current detection unit 133 and the switch module 111 are connected in series in the power supply branch 110, and the current detection unit 133 can detect the current of the power supply branch 110. After the system is powered on, the control module 120 can determine the power supply branch 110 corresponding to the maximum power supply voltage as the set power supply branch, and the other power supply branches 110 as non-set power supply branches; then send a conduction control signal to the switch module 111 of the set power supply branch, and determine whether the switch module 111 of the set power supply branch works normally according to the difference between the power supply voltage and the load voltage corresponding to the set power supply branch, or determine whether the set power supply branch works normally according to the current corresponding to the set power supply branch. After determining that the switch module 111 of the set power supply branch works normally, control the switch module 111 in the set power supply branch to remain on, and send a conduction control signal to the switch module 111 of the non-set power supply branch, and determine whether the switch module 111 in the non-set power supply branch works normally according to the current of the non-set power supply branch.

[0056] Optionally, if there is a current flowing from the power output terminal B1 to the power input terminal A1 in the non-set power supply branch, it is determined that the switch module 111 of the non-set power supply branch is working normally; if there is no current flowing from the power output terminal B1 to the power input terminal A1 in the non-set power supply branch, it is determined that the switch module 111 of the non-set power supply branch is not working normally. Specifically, since the power supply voltage of the set power supply branch is greater than the power supply voltage of the non-set power supply branch, if the switch module 111 in the non-set power supply branch can be turned on normally after receiving the conduction control signal, there will be a current from the power output terminal B1 to the power input terminal A1 in the non-set power supply branch, and it can be determined that the switch module 111 in the non-set power supply branch is working normally. On the contrary, if the switch module 111 in the non-set power supply branch cannot be turned on normally after receiving the conduction control signal, there will be no current from the power output terminal B1 to the power input terminal A1 in the non-set power supply branch, and it can be determined that the switch module 111 in the non-set power supply branch cannot work normally.

[0057] Continue to refer Figure 2 and Figure 3 Optionally, the power supply system further includes a driving module 140, which is electrically connected to the control module 120 and the switch module 111 respectively, and the control module 120 is used to drive the switch module 111 to be turned on or off through the driving module 140.

[0058] Specifically, the control module 120 can be electrically connected to the switch module 111 through the drive module 140, and can send a turn-on control signal or a turn-off control signal (the turn-off control signal is used to control the switch module 111 to turn off) to the switch module 111 through the drive module 140. By setting the drive module 140, the drive capability of the control module 120 to the switch module 111 can be enhanced.

[0059] Optionally, the switch module 111 includes a semiconductor field effect transistor.

[0060] Specifically, the detection module and the control module 120 in the power supply system can also be connected to the power output terminal B1 of the power supply branch 110 as the load 300 of the power supply system. Among them, the semiconductor field effect transistor includes a parasitic diode. When the power supply system is just powered on, the control module 120 cannot send a control signal (including a turn-on control signal and a turn-off control signal) to the switch module 111, and the power supply 200 connected to the power supply branch 110 competes for power supply through the parasitic diode.

[0061] The embodiment of the present invention further provides a power supply method for a power supply system, and the power supply method can be applied to the power supply system of any of the above embodiments of the present invention. Figure 4 is a flow chart of a power supply method of a power supply system provided by an embodiment of the present invention, with reference to Figure 4 , power supply methods include:

[0062] S210: After sending a conduction control signal to at least one switch module, determine whether the at least one switch module operates normally according to a voltage signal and / or a current signal.

[0063] The voltage signal and / or current signal is detected by a detection module in the power supply system. The method for determining whether the switch module is working properly according to the voltage signal and / or current signal can refer to the method for determining whether the switch module is working properly in the power supply system in any of the above embodiments of the present invention.

[0064] S220: If yes, control at least one switch module to conduct to supply power to the load.

[0065] Specifically, when at least one switch module is working normally, at least one normally working switch module can be controlled to be turned on to supply power to the load. If it is determined according to the voltage signal and / or the current signal that each switch module is not working normally, an alarm signal can be sent through the alarm module or a fault message can be sent to the staff, thereby reminding the staff to replace the switch module in time.

[0066] In some optional embodiments of the present invention, after sending a conduction control signal to at least one switch module, when it is determined that at least one switch module is operating normally based on a voltage signal and / or a current signal, the switch module in the power supply branch corresponding to the maximum power supply voltage in the power supply branch corresponding to the normally operating switch module is controlled to be turned on to supply power to the load.

[0067] Specifically, after determining that at least one switch module is working normally, the power supply voltage of each power supply branch can be detected in real time through the detection module. By comparing the power supply voltages of each power supply branch, the switch modules that can work normally are selected, and the switch module in the power supply branch corresponding to the maximum power supply voltage is turned on to ensure sufficient power supply.

[0068] The power supply method of this embodiment is applied to the power supply system of any of the above embodiments of the present invention, and has the beneficial effects of the power supply system of any of the above embodiments of the present invention.

[0069] Figure 5 is a flowchart of another power supply method of a power supply system provided by an embodiment of the present invention, with reference to Figure 5 , power supply methods include:

[0070] S310, after the power supply system is powered on, determine the power supply branch with the largest power supply voltage as the set power supply branch, and the other power supply branches as non-set power supply branches;

[0071] S320, sending a conduction control signal to a switch module of a set power supply branch;

[0072] S330, determining whether the switch module of the set power supply branch operates normally according to the power supply voltage and the load voltage of the set power supply branch.

[0073] Optionally, S330 includes: if the power supply voltage and load voltage of the set power supply branch are less than the set voltage threshold, determining that the switch module of the set power supply branch is working normally; if the power supply voltage and load voltage of the set power supply branch are greater than or equal to the set voltage threshold, determining that the switch module of the set power supply branch is not working normally.

[0074] If the switch module of the set power supply branch works normally, execute S340, control the switch module in the set power supply branch to remain turned on, and send a turn-on control signal to the switch module of the non-set power supply branch;

[0075] S350: Determine whether the switch module of the non-set power supply branch operates normally according to the current to the non-set power supply branch.

[0076] Optionally, executing S350 includes: if a non-set power supply branch exists and a current flows from the power output end to the power input end, determining that the switch module of the non-set power supply branch is working normally; if a non-set power supply branch does not exist and a current flows from the power output end to the power input end, determining that the switch module of the non-set power supply branch is not working normally.

[0077] When the switch modules of the non-set power supply branches are operating normally, executing S360, controlling at least one switch module to be turned on to supply power to the load;

[0078] When the switch module of the non-set power supply branch does not work normally, S370 is executed to control the switch module of the set power supply branch to be turned on to supply power to the load.

[0079] In S330, if it is determined that the switch module of the set power supply branch is working normally, S340 can also be executed, and then whether the switch module in the set power supply branch is working normally is determined according to the difference between the power supply voltage and the load voltage corresponding to the set power supply branch; or whether the switch module in the set power supply branch is working normally is determined according to whether the circuit in the set power supply branch reaches the set current threshold.

[0080] Figure 6 is a flowchart of another power supply method of a power supply system provided by an embodiment of the present invention, with reference to Figure 6 Taking the case where the power supply system includes two power supply branches, namely a first power supply branch and a second power supply branch as an example, the power supply method includes:

[0081] S410, determining whether the power supply voltage of the first power supply branch is greater than the power supply voltage of the second power supply branch;

[0082] If yes, execute S420 to send a conduction control signal to the switch module in the first power supply branch.

[0083] If not, execute S430 to send a conduction control signal to the switch module in the second power supply branch.

[0084] After S420, it also includes:

[0085] S440, determining whether the difference between the power supply voltage and the load voltage of the first power supply branch is less than a set voltage threshold;

[0086] If not, execute S451 to determine whether the switch module in the first power supply branch is not working properly.

[0087] If yes, execute S452, determine that the switch module in the first power supply branch works normally, and send a conduction control signal to the switch module in the second power supply branch while controlling the switch module in the first power supply branch to remain turned on;

[0088] S460, determining whether the current in the second power supply branch is less than 0;

[0089] If yes, execute S470 to determine that the switch module in the second power supply branch works normally;

[0090] If not, execute S480 to determine that the switch module in the second power supply branch does not work properly, and report to the vehicle control unit.

[0091] Specifically, before S460, the positive direction of the current can be defined, for example, the current flowing from the power input end to the power output end in the power supply branch is defined as the current in the positive direction (the current is greater than 0), and the current flowing from the power output end to the power input end in the power supply branch is defined as the current in the negative direction (the current is less than 0).

[0092] After S430, it also includes:

[0093] S510, determining whether the difference between the power supply voltage and the load voltage of the second power supply branch is less than a set voltage threshold;

[0094] If not, execute S521 to determine whether the switch module in the second power supply branch is not working properly.

[0095] If yes, execute S522, determine that the switch module in the second power supply branch works normally, and send a conduction control signal to the switch module of the first power supply branch while controlling the switch module in the second power supply branch to remain turned on;

[0096] S530, determining whether the current in the first power supply branch is less than 0;

[0097] If yes, execute S540, determine that the switch module in the first power supply branch works normally;

[0098] If not, execute S550 to determine that the switch module in the first power supply branch does not work properly, and report to the vehicle control unit.

[0099] In the case that the switch modules in the first power supply branch and / or the second power supply branch operate normally, at least one switch module may be controlled to be turned on to supply power to the load.

[0100] An embodiment of the present invention further provides a vehicle, Figure 7 is a schematic diagram of a vehicle structure provided by an embodiment of the present invention, with reference to Figure 7The vehicle includes the power supply system 100 of any of the above embodiments of the present invention, and the load 300 of the power supply system includes an electronic induction braking system 301 and a driving circuit 302 and a control circuit 303 of the electronic induction braking system 301. The control circuit 303 can drive and control the electronic induction braking system 301 through the driving circuit 302. In the vehicle, the electronic induction braking system 301 and the driving circuit 302 and the control circuit 303 of the electronic induction braking system 301 do not need to be redundant, the scale and cost of the power supply system are reduced, and the space occupied by the power supply system in the vehicle is reduced.

[0101] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0102] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power supply system, characterized in that: include: At least two power supply branches, a control module and a detection module; The power supply branch includes a power input terminal, a power output terminal and a switch module connected between the power input terminal and the power output terminal; The power input terminal is used to connect to a power source, and the power output terminal is used to connect to a load; The detection module is used to detect a voltage signal and / or a current signal in the power supply system, wherein the voltage signal includes a power supply voltage of the power supply and a load voltage of the load; and the current signal includes a current in the power supply branch; The control module is electrically connected to the switch module and the detection module respectively. The control module is used to send a conduction control signal to at least one of the switch modules, and when it is determined according to the voltage signal and / or the current signal that at least one of the switch modules is working normally, control at least one of the switch modules to conduct to supply power to the load.

2. The power supply system according to claim 1, characterized in that: The detection module includes at least two power supply voltage detection units and a load voltage detection unit; the power supply voltage detection unit is electrically connected to the power supply branch correspondingly and is used to detect the power supply voltage of the power supply branch, and the load voltage detection unit is used to detect the load voltage of the load; The control module is used to send a control signal to a switch module after the power supply system is powered on, and determine whether the switch module is operating normally according to the power supply voltage of the power supply branch where the switch module is located and the magnitude relationship of the load voltage.

3. The power supply system according to claim 2, characterized in that: The detection module further includes at least two current detection units, which are arranged in the power supply branch and are used to detect the current of the power supply branch; The control module is used to send a conduction control signal to the switch module of the set power supply branch after the system is powered on, and after determining that the switch module of the set power supply branch is working normally, control the switch module in the set power supply branch to remain on, and send a conduction control signal to the switch module of the non-set power supply branch; wherein the set power supply branch is the power supply branch with the largest power supply voltage; The control module is further configured to determine whether the switch module in the non-set power supply branch operates normally according to the current of the non-set power supply branch.

4. The power supply system according to claim 1, characterized in that: It also includes a driving module, which is electrically connected to the control module and the switch module respectively, and the control module is used to drive the switch module to be turned on or off through the driving module.

5. The power supply system according to claim 1, characterized in that: The switch module includes a semiconductor field effect transistor.

6. A power supply method for a power supply system, characterized in that: Applied to the power supply system according to any one of claims 1 to 5, the power supply method comprises: After sending a conduction control signal to at least one of the switch modules, when it is determined according to the voltage signal and / or the current signal that at least one of the switch modules is operating normally, at least one of the switch modules is controlled to conduct to supply power to the load.

7. The power supply method according to claim 6, characterized in that: After sending the conduction control signal to at least one of the switch modules, when it is determined according to the voltage signal and / or the current signal that at least one of the switch modules is operating normally, controlling at least one of the switch modules to conduct to supply power to the load includes: After the power supply system is powered on, the power supply branch with the largest power supply voltage is determined as a set power supply branch, and the other power supply branches are non-set power supply branches; Sending a conduction control signal to the switch module of the set power supply branch; Determining whether the switch module of the set power supply branch is operating normally according to the power supply voltage and the load voltage of the set power supply branch; If yes, while controlling the switch module in the set power supply branch to remain turned on, sending a turn-on control signal to the switch module in the non-set power supply branch; Determining whether the switch module of the non-set power supply branch is operating normally according to the current to the non-set power supply branch; When the switch modules of the non-set power supply branch are operating normally, controlling at least one of the switch modules to be turned on to supply power to the load; When the switch module of the non-set power supply branch does not work normally, the switch module of the set power supply branch is controlled to be turned on to supply power to the load.

8. The power supply method according to claim 7, characterized in that: The determining, according to the power supply voltage and the load voltage of the set power supply branch, whether the switch module of the set power supply branch is operating normally includes: If the power supply voltage of the set power supply branch and the load voltage are less than a set voltage threshold, it is determined that the switch module of the set power supply branch is operating normally; If the power supply voltage of the set power supply branch and the load voltage are greater than or equal to a set voltage threshold, it is determined that the switch module of the set power supply branch is not working properly; And / or, determining whether the switch module of the non-set power supply branch operates normally according to the current to the non-set power supply branch includes: If the non-set power supply branch has a current flowing from the power output end to the power input end, it is determined that the switch module of the non-set power supply branch is operating normally; If no current flows from the power output end to the power input end of the non-set power supply branch, it is determined that the switch module of the non-set power supply branch is not operating normally.

9. The power supply method according to claim 6, characterized in that: After sending a conduction control signal to at least one of the switch modules, when it is determined according to the voltage signal and / or the current signal that at least one of the switch modules is operating normally, controlling at least one of the switch modules to conduct to supply power to the load includes: After sending a conduction control signal to at least one of the switch modules, when it is determined that at least one of the switch modules is working normally according to the voltage signal and / or the current signal, the switch module in the power supply branch corresponding to the normally working switch module is controlled to be turned on to supply power to the load.

10. A vehicle, characterized in that: The invention comprises the power supply system according to any one of claims 1 to 5, wherein the load of the power supply system comprises an electronic induction braking system and a driving circuit and a control circuit of the electronic induction braking system.

Images