Control circuits, power supply systems, load systems, power systems and electric vehicles

Abstract

The present application discloses a control circuit, a power supply system, a load system, an electric energy system and an electric vehicle, which are used to improve the reliability of power supply to the load system. The present application provides a control circuit in a power supply system, which is used to control the power on and off of the load system. The load system includes a controller, a bus and a load. The control circuit includes: a power supply, and a plurality of circuits electrically connected to the power supply; wherein the plurality of circuits include: a first circuit for controlling the power on and off of the controller in the load system, a second circuit for controlling the power on and off of the bus in the load system, and a third circuit for controlling the power on and off of the load in the load system. Therefore, the present application realizes the separate control of the conduction and disconnection of the circuits of the controller, bus and various levels of load in the load system, thereby greatly improving the reliability of power supply to the load system.

Description

Technical Field

[0001] The present application relates to the field of electrical technology, and in particular to a control circuit, a power supply system, a load system, an electric energy system and an electric vehicle. Background Art

[0002] See also Figure 1 The control circuit structure of the power supply system on the market is simple, and most of them are completed by one-step power on / off, that is, through the power on and off switches or buttons, the power supply system is directly controlled to provide a low-voltage power supply (generally +9V~+36V) for the controller in the load system to work or stop. The controller is generally a low-voltage device, such as a battery management system (Battery Management System, abbreviated as BMS). Summary of the invention

[0003] Embodiments of the present application provide a control circuit, a power supply system, a load system, an electric energy system and an electric vehicle, so as to improve the reliability of power supply to the load system.

[0004] A control circuit in a power supply system provided in an embodiment of the present application is used to control power on and off of a load system, wherein the load system includes a controller, a bus and a load, and the control circuit includes: a power supply, and a plurality of circuits electrically connected to the power supply; wherein the plurality of circuits include: a first circuit for controlling power on and off of the controller in the load system, a second circuit for controlling power on and off of the bus in the load system, and a third circuit for controlling power on and off of the load in the load system.

[0005] By setting up multiple circuits (i.e., the first circuit, the second circuit, and the third circuit) in the control circuit for controlling the controller, bus, and load in the load system, the conduction and disconnection of the circuits of the controller, bus, and loads at each level in the load system are controlled separately, thereby greatly improving the reliability of power supply to the load system, especially the reliability of power supply to the bus and loads therein. Therefore, it can be widely used in scenarios with high requirements for power supply reliability and scenarios requiring multi-level power on and off control.

[0006] In some embodiments, the first circuit includes: a first switch device, a second switch device, a third switch device, a first signal line, and a second signal line;

[0007] Wherein, the first switch device includes a first switch and a second switch; the second switch device and the third switch device each include a coil and a main contact switch;

[0008] The main contact switch of the second switching device is connected between the positive electrode of the power supply and the first node, the first switch of the first switching device is connected to the first node and one end of the first signal line, the other end of the first signal line is used to be electrically connected to an input port of the controller, and the second switch of the first switching device is connected in parallel with the main contact switch of the third switching device;

[0009] The coil of the second switching device is connected in parallel with the coil of the third switching device, and one end of the coil is electrically connected to the negative electrode of the power supply, and the other end of the coil is electrically connected to one end of the main contact switch of the third switching device, and the other end of the main contact switch of the third switching device is electrically connected to the positive electrode of the power supply;

[0010] One end of the second signal line is electrically connected to the first node, and the other end is used to be electrically connected to the positive electrode of the power supply of the controller.

[0011] In some embodiments, the first circuit further includes: a fourth switching device, a fifth switching device and a third signal line;

[0012] The fourth switch device is connected between the first node and one end of the third signal line, and the other end of the third signal line is used to be electrically connected to an output port of the controller;

[0013] The fifth switching device includes a coil and a main contact switch, the coil of the fifth switching device is connected between the negative electrode of the power supply and the connection point between the fourth switching device and the third signal line; the main contact switch of the third switching device is connected to the coil of the second switching device and the coil of the third switching device through the main contact switch of the fifth switching device.

[0014] In some embodiments, the second circuit includes: a sixth switch device, a fourth signal line, and a fifth signal line;

[0015] Among them, the sixth switching device includes a first self-locking switch and a second self-locking switch, the first self-locking switch is connected between the first node and one end of the fourth signal line, and the other end of the fourth signal line is used to be electrically connected to an input port of the controller; the second self-locking switch is connected between the first node and one end of the fifth signal line, and the other end of the fifth signal line is used to be electrically connected to a switch in the load system for controlling the conduction and disconnection of the bus loop.

[0016] In some embodiments, the third circuit includes: a seventh switching device, an eighth switching device, a ninth switching device, a sixth signal line, and a seventh signal line;

[0017] Wherein, the seventh switch device includes a first switch and a second switch; the eighth switch device and the ninth switch device both include a coil and a main contact switch;

[0018] The first switch of the seventh switch device is connected between the first node and one end of the sixth signal line, the other end of the sixth signal line is used to be electrically connected to an input port of the controller, and the second switch of the seventh switch device is connected in parallel with the main contact switch of the eighth switch device;

[0019] The main contact switch of the ninth switch device is connected between the first node and one end of the seventh signal line, and the other end of the seventh signal line is used to be electrically connected to a switch in the load system for controlling the on and off of a load circuit;

[0020] The coil of the eighth switching device and the coil of the ninth switching device are connected in parallel between the negative electrode of the power supply and one end of the main contact switch of the eighth switching device, and the other end of the main contact switch of the eighth switching device is electrically connected to the first node.

[0021] In some embodiments, the third circuit further includes: a tenth switching device, an eleventh switching device and an eighth signal line;

[0022] The tenth switch device is connected between the first node and one end of the eighth signal line, and the other end of the eighth signal line is used to be electrically connected to an output port of the controller;

[0023] The eleventh switching device includes a coil and a main contact switch; wherein the coil of the eleventh switching device is connected between the negative electrode of the power supply and the connection point between the tenth switching device and the eighth signal line; the main contact switch of the eighth switching device is connected to the coil of the eighth switching device and the coil of the ninth switching device through the main contact switch of the eleventh switching device.

[0024] In some embodiments, when the load system includes other loads in addition to the load, the third circuit also includes a power-on control switch of the other load and a signal line corresponding to the other load;

[0025] The power-on control switch of the other load is connected between the first node and one end of the signal line corresponding to the other load, and the other end of the signal line corresponding to the other load is used to be electrically connected to an input port of the controller.

[0026] An embodiment of the present application provides a power supply system, comprising any of the above-mentioned control circuits.

[0027] A load system provided in an embodiment of the present application includes a controller, a bus, a load, and a circuit structure configured to correspond to any of the control circuits described above.

[0028] In some embodiments, the circuit structure includes a first signal line, a second signal line, and a third signal line;

[0029] Wherein, one end of the first signal line in the circuit structure is used to be electrically connected to the first signal line in the first circuit, and the other end is electrically connected to an input port of the controller;

[0030] One end of the second signal line in the circuit structure is used to be electrically connected to the second signal line in the first circuit, and the other end is electrically connected to the positive electrode of the power supply of the controller;

[0031] One end of the third signal line in the circuit structure is used to be electrically connected to the third signal line in the first circuit, and the other end is electrically connected to an output port of the controller.

[0032] In some embodiments, the circuit structure further includes a switch for controlling the on and off of the bus loop, a fourth signal line, and a fifth signal line;

[0033] Wherein, one end of the fourth signal line in the circuit structure is used to be electrically connected to the fourth signal line in the second circuit, and the other end is electrically connected to an input port of the controller;

[0034] One end of the fifth signal line in the circuit structure is used to be electrically connected to the fifth signal line in the second circuit, and the other end is electrically connected to the switch for controlling the on and off of the bus loop.

[0035] In some embodiments, the circuit structure further includes a switch for controlling on and off of the load loop, a sixth signal line, a seventh signal line, and an eighth signal line;

[0036] Wherein, one end of the sixth signal line in the circuit structure is used to be electrically connected to the sixth signal line in the third circuit, and the other end is electrically connected to an input port of the controller;

[0037] One end of the seventh signal line in the circuit structure is used to be electrically connected to the seventh signal line in the third circuit, and the other end is electrically connected to the switch for controlling the on and off of the load circuit;

[0038] One end of the eighth signal line in the circuit structure is used to be electrically connected to the eighth signal line in the third circuit, and the other end is electrically connected to an output port of the controller.

[0039] In some embodiments, when the controller determines that the loads and buses in the load system need to be powered off normally, the controller controls the loads and buses in the load system to be powered off in a preset order;

[0040] When the controller determines that the entire load system needs to be powered off with one key in an emergency, the controller sends a control signal to the control circuit through the third signal line in the circuit structure, so that the control circuit and the load system are powered off;

[0041] When the controller determines that the load needs to be powered off urgently, it sends a control signal to the control circuit through the eighth signal line in the load system, so that the third circuit in the control circuit is disconnected and the load is powered off.

[0042] An electric energy system provided in an embodiment of the present application includes the power supply system described above, and any of the load systems described above.

[0043] An electric vehicle provided in an embodiment of the present application includes the above-mentioned electric energy system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A schematic diagram of a control circuit in a power supply system provided in an embodiment of the present application providing multi-level power supply to a load system;

[0046] Figure 2 A schematic diagram of a specific circuit structure of an electric energy system provided in an embodiment of the present application;

[0047] Figure 3 A schematic diagram of the control circuit structure in the power supply system provided in an embodiment of the present application;

[0048] Figure 4 A schematic diagram of a local circuit (for illustrating a main contact switch and a coil) in a control circuit in a power supply system provided in an embodiment of the present application;

[0049] Figure 5 A schematic diagram of a local circuit (for illustrating a first node) in a control circuit in a power supply system provided in an embodiment of the present application;

[0050] Figure 6 A schematic diagram of the circuit structure of a load system provided in an embodiment of the present application;

[0051] Figure 7A schematic diagram of the overall framework of an electric energy system including a control circuit and a load system provided in an embodiment of the present application;

[0052] Figure 8 A schematic diagram of a power supply provided in an embodiment of the present application providing multiple levels of power supply to a load system. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] After the controller in the load system is powered on, the controller can directly drive the main circuit bus (bus for short) of the load in the load system, as well as the coils of the contactors of the load circuits at all levels in the load system, so as to control the on / off of the main contacts (main circuit, load circuit) of the contactors of the load circuits at all levels. However, if the control circuit in the power supply system does not participate in the on / off control of the bus and loads at all levels in the load system after the control circuit in the power supply system completes the power supply to the controller in the load system, then the load circuit completely relies on the controller in the load system for driving and control, the power supply reliability is low, and there is a certain risk of loss of control. Therefore, the embodiments of the present application provide a control circuit, a power supply system, a load system, an electric energy system and an electric vehicle to improve the reliability of power supply to the load system.

[0055] Among them, the control circuit, power supply system, load system, electric energy system and electric vehicle are based on the same application concept. Since the principles of solving the problems are similar, the implementation of the control circuit, power supply system, load system, electric energy system and electric vehicle can refer to each other, and the repeated parts will not be repeated.

[0056] The terms "first", "second", etc. (if any) in the specification and claims of the embodiments of the present application 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 interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than the content illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0057] The following examples and embodiments are to be understood as illustrative examples only. Although this specification may refer to "one", "an" or "some" examples or embodiments in several places, this does not mean that each such reference relates to the same example or embodiment, nor does it mean that the feature applies only to a single example or embodiment. Individual features of different embodiments may also be combined to provide other embodiments. In addition, terms such as "including" and "comprising" should be understood as not limiting the described embodiments to only those features that have been mentioned; such examples and embodiments may also include features, structures, units, modules, etc. that are not specifically mentioned.

[0058] The following is a detailed description of each embodiment of the present application in conjunction with the accompanying drawings. It should be noted that the display order of the embodiments of the present application only represents the order of the embodiments, and does not represent the advantages and disadvantages of the technical solutions provided by the embodiments.

[0059] like Figure 1 As shown, in addition to the controller, the load system also includes a bus and loads at various levels, wherein the loads at various levels include multiple loads, for example, respectively referred to as the first load (also referred to as load 1), the second load (also referred to as load 2), the third load (also referred to as load 3)... the nth load (load n), and so on. The loads at various levels can be loads such as motors or electrical appliances, and the embodiments of the present application are not limited thereto. It should be noted that the controller in the load system described in the embodiments of the present application is, for example, a low-voltage device, such as a controller such as a BMS, a PLC, etc. In the embodiments of the present application, BMS is taken as an example for explanation, but of course the controller is not limited to BMS. In addition, the low-voltage devices described in the embodiments of the present application all refer to low-voltage devices, such as devices powered by 24V voltage.

[0060] like Figure 1 As shown, the control circuit in the power supply system provided in the embodiment of the present application has multiple power-on and power-off control modes, for example: a first-speed power-on mode, a second-speed power-on mode, a third-speed power-on mode, a fourth-speed power-on mode, etc., wherein the first-speed power-on mode is used to realize the power-on and power-off control of the controller in the load system by the power supply system; the second-speed power-on mode is used to realize the power-on and power-off control of the bus in the load system by the power supply system; the third-speed power-on mode is used to realize the power-on and power-off control of the first load in the load system by the power supply system; the fourth-speed power-on mode is used to realize the power-on and power-off control of the second load in the load system by the power supply system, and so on.

[0061] When the load system is working, the control circuit provided in the embodiment of the present application provides a multi-level power supply (such as a controller control power supply, a bus control power supply, a load control power supply, etc.), and then through the controller in the load system, controls the multi-level power supply to be turned on and off to the bus and the coils of the contactors of each level of the load, thereby jointly realizing the conduction and disconnection of the bus and the main circuits of each level of the load. It should be noted that in the embodiment of the present application, there can be only one power supply (such as a battery) on the control circuit in the power supply system, which supplies power to the controller, the bus, and each level of the load respectively. In order to distinguish, when the power supply supplies power to the controller, the power supply can be called a controller control power supply; when the power supply supplies power to the bus, the power supply can be called a bus control power supply; when the power supply supplies power to the load, the power supply can be called a load control power supply.

[0062] An electric energy system provided in an embodiment of the present application includes a power supply system and a load system, wherein the power supply system includes a control circuit for controlling power on and off of the load system, and the load system includes a controller, a bus and a load.

[0063] The control circuit in the power supply system and the controller in the load system cooperate to realize the power on / off of the busbar and loads at various levels in the load system, that is, by controlling the conduction of the power supply in the control circuit in the power supply system and the conduction of the coil power supply circuit of the busbar and contactors of loads at various levels in the load system, the power supply reliability of the busbar and loads at various levels in the load system is greatly improved, and the load power on and off control can be realized in steps according to different loads, and the power on and off control of multi-level loads can be realized. It can be widely used in load systems with high requirements for power supply reliability or step-by-step power on and off requirements.

[0064] The control circuit provided in the embodiment of the present application has a one-button start function and a one-button power-off function (including normal one-button power-off and emergency one-button power-off). Among them, when starting, by operating the one-button start switch set on the control circuit, the controller can be directly started and data can be sent; when powering off, by operating the normal one-button power-off switch set on the control circuit (the same switch as the one-button start switch), an action signal can be sent to the controller, and the controller controls the loads and buses at all levels in the load system to automatically power off step by step (that is, realize the normal one-button power-off function); and, when an emergency occurs, by operating the emergency one-button power-off switch set on the control circuit, the controller, bus, and loads at all levels in the load system can be powered off with one button (that is, realize the emergency one-button power-off function). In addition, further, through the circuit structure set between the I / O output port of the controller and the control circuit, the controller can directly drive the switch device in the control circuit to disconnect, so that each level of load in the load system, or even the entire load system, is automatically powered off, and the normal one-button power-off switch and the emergency one-button power-off switch in the above-mentioned manual active emergency disconnection control circuit are used to power off the load system, forming a double insurance for the power-off control of the load system.

[0065] The control circuit provided in the embodiment of the present application is equipped with an electrical interlock. When powering on, the power can only be successfully turned on in the order of "low voltage-bus-first load-second load-...nth load". If the previous power-on step is not completed, the subsequent steps cannot be powered on, thereby ensuring electrical safety and effectively avoiding misoperation.

[0066] The following is a detailed example description of the technical solution provided by the embodiments of the present application in conjunction with the accompanying drawings.

[0067] For example, the circuit structure of the control circuit and the load system provided in the embodiment of the present application is as follows: Figure 2 As shown, in order to more clearly show the specific structure of the control circuit, Figure 3 , Figure 4 The specific circuit structures of the control circuit and the load system are shown respectively.

[0068] The control circuit provided in the embodiment of the present application is as follows Figure 3 As shown, its main components include:

[0069] S1: double-pole self-resetting switch;

[0070] S2: Single-pole self-resetting switch;

[0071] S3: double-pole self-locking switch;

[0072] S4: double-pole self-resetting switch;

[0073] S5: Single-pole self-resetting switch;

[0074] S6: Single-pole self-resetting switch;

[0075] Sm: single-pole self-resetting switch;

[0076] KM1: contactor;

[0077] K1 (normally open), K2 (normally closed), K3 (normally open), K4 (normally open), K5 (normally closed): intermediate relay.

[0078] The above-mentioned contactors and relays all include a main contact switch and a coil. Taking K1 as an example, its main contact switch and coil are as follows: Figure 4 When the coil is energized, the corresponding main contact switch action (open or close) is triggered.

[0079] The double-pole self-resetting switch includes two switches, and the two switches are in a linkage state. The double-pole self-resetting switch is disconnected in the default state, that is, the two switches are in the disconnected state at the same time. When the double-pole self-resetting switch is pressed by the user, the two switches are closed, and when the user releases the hand, the two switches are automatically reset to the disconnected state.

[0080] The single-pole self-resetting switch is similar to the double-pole self-resetting switch, except that it only includes one switch.

[0081] The double-pole self-locking switch also includes two switches, which are in a linked state. The double-pole self-locking switch is also a common button switch, and the difference from the double-pole self-reset switch is that when the double-pole self-locking switch button is pressed by the user for the first time, the two switches are connected and maintained, that is, self-locking, and when the double-pole self-locking switch button is pressed by the user for the second time, the two switches are disconnected, and the double-pole self-locking switch button pops out at the same time.

[0082] The contactor (KM is the electrical component symbol of the contactor) is a commonly used electrical switching device, mainly composed of an electromagnet and a contact, which can realize the switching control of the circuit, and therefore is also a switching device.

[0083] The intermediate relay is usually used to transmit signals and control multiple circuits at the same time. Its structure and working principle are basically the same as those of the AC contactor. The main difference is that it has more contacts and smaller contact capacity. Therefore, it can also be regarded as a switching device.

[0084] See also Figure 3A control circuit provided in an embodiment of the present application includes a battery (i.e., a power supply), an S1 double-pole self-resetting switch, an S2 single-pole self-resetting switch, an S3 double-pole self-locking switch, an S4 double-pole self-resetting switch, an S5 single-pole self-resetting switch, an Sm single-pole self-resetting switch, a KM1 contactor, a K1 intermediate relay, a K2 intermediate relay, a K3 intermediate relay, a K4 intermediate relay, a K5 intermediate relay, and a plurality of signal lines, respectively referred to as the 0th signal line (line number 0), the first signal line (line number 1), the second signal line (line number 2)...the pth signal line (line number p).

[0085] For the convenience of description, the above double-pole switches are located at Figure 3 The switch at the upper position is called the first switch, and the switch at the lower position is called the second switch.

[0086] One end of the main contact switch of the KM1 contactor is electrically connected to the positive electrode (24V+) of the battery, and the other end is connected to the positive electrode (24V+) of the battery. Figure 5 , called the first node (for ease of expression), is electrically connected to the first switch in the S1 double-pole self-resetting switch; the second switch of S1 is connected in parallel with the main contact switch of K1, one end of the parallel connection is electrically connected to the positive electrode (24V+) of the battery, and the other end is electrically connected to one end of the main contact switch of K2, the other end of the main contact switch of K2 is electrically connected to one end of the coil of K1 and the coil of KM1, and the coil of K1 and the coil of KM1 are connected in parallel, and the other ends of the coil of K1 and the coil of KM1 are electrically connected to the negative electrode (24V-) of the battery.

[0087] The first switch of the S1 double-pole self-resetting switch is electrically connected to the first node and the first signal line (line number 1) respectively;

[0088] The two ends of the S2 single-pole self-resetting switch are electrically connected to the first node and the third signal line (line number 3) respectively;

[0089] The two ends of the first switch in the S3 double-pole self-locking switch are electrically connected to the first node and the fifth signal line (line number 5) respectively; the two ends of the second switch in the S3 double-pole self-locking switch are electrically connected to the first node and the fourth signal line (line number 4) respectively;

[0090] The two ends of the first switch in the S4 double-pole self-resetting switch are electrically connected to the first node and the sixth signal line (line number 6) respectively; the second switch in the S4 double-pole self-resetting switch is connected in parallel with the main contact switch of K3, one end of the parallel connection is electrically connected to the first node, and the other end of the parallel connection is electrically connected to one end of the main contact switch of K5, and the other end of the main contact switch of K5 is electrically connected to one end of the coil of K3 and the coil of K4, and the coil of K3 and the coil of K4 are connected in parallel, and the other ends of the coil of K3 and the coil of K4 are electrically connected to the negative electrode (24V-) of the battery.

[0091] The two ends of the main contact switch of the K4 intermediate relay are electrically connected to the first node and the seventh signal line (line number 7) respectively;

[0092] The two ends of the S5 single-pole self-resetting switch are electrically connected to the first node and the eighth signal line (line number 8) respectively;

[0093] The two ends of the S6 single-pole self-resetting switch are electrically connected to the first node and the ninth signal line (line number 9) respectively;

[0094] …

[0095] The two ends of the Sm single-pole self-resetting switch are electrically connected to the first node and the pth signal line (line number p) respectively.

[0096] Further, combined with Figure 2 The signal lines indicated by line number 1, line number 4, line number 6, line number 9 ... line number p are respectively electrically connected to an input port of the BMS (one signal line is connected to one input port) as signal lines of the feedback switch action signal;

[0097] The signal line indicated by line number 2 is electrically connected to the positive electrode of the power supply in the BMS as a low-voltage power supply signal line;

[0098] The signal line indicated by line number 0 is electrically connected to the negative electrode of the power supply in the BMS as a low-voltage power supply signal line;

[0099] The signal line shown in line number 5 is electrically connected as a bus low-voltage power supply signal line to one end of the main contact switch of relay A_K1 that controls the conduction and disconnection of the bus (contactor coil) circuit; the power required for the coil of the bus contactor is connected to the coil of the bus contactor through the main contact switch of relay A_K1; the specific process is that the signal line shown in line number 5 provides the power required for the coil of the bus contactor, and is connected to the bus contactor coil through the main contact switch of relay A-K1. After the bus contactor coil is energized, the bus contactor main contact switch (not shown in the figure) is closed, and the bus main circuit is turned on.

[0100] The signal line shown in line number 7 is electrically connected as a load power supply signal line to one end of the main contact switch of relay A_K2 which controls the on and off of the load (contactor coil) circuit of load 1; the power required by the contactor coil of load 1 is connected to the contactor coil of load 1 through the main contact switch of relay A_K2; the actual principle of the specific process is that the signal line shown in line number 7 provides the power required by the coil of the load contactor, and is connected to the load contactor coil through the main contact of relay A-K2. After the load contactor coil is energized, the load contactor main contact switch (not shown in the figure) is closed, and the load main circuit is turned on.

[0101] The signal line indicated by line number 3 is electrically connected to an output port in the BMS as a low-voltage emergency power-off signal line;

[0102] The signal line indicated by line number 8 is electrically connected to an output port in the BMS as a load emergency power-off signal line.

[0103] For load systems, see Figure 6 , corresponding to the above control circuit, also include the 0th signal line (line number 0), the first signal line (line number 1), the second signal line (line number 2) ... the pth signal line (line number p). In addition, it also includes a low-voltage device (BMS), a busbar and loads of various levels (load 1 to load n). Among them, the low-voltage device (BMS) includes a power supply, multiple I / O input ports and multiple I / O output ports; the load system also includes multiple relays (of course, contactors and other switching devices are also possible), namely A_K1, A_K2...A_K(n+1). Similarly, each relay includes a coil and a main contact switch, wherein the coils of A_K1, A_K2...A_K(n+1) are electrically connected to the I / O output port of the low-voltage device (BMS), so that the conduction and disconnection of the main contact switches of A_K1, A_K2...A_K(n+1) are controlled by the low-voltage device (BMS). The main contact switches A_K1, A_K2...A_K(n+1) are used to control the conduction and disconnection of the power supply circuit of the bus contactor, the power supply circuit of the contactor of load 1, the power supply circuit of the contactor of load 2,...the power supply circuit of the contactor coil of load n (that is, the multi-level power supply of the control circuit, through the main contact switches A_K1, A_K2...A_K(n+1) controlled by the controller, to the bus and the circuits of the contactor coils of each level of load).

[0104] Power-on process:

[0105] The controller of the load system is powered on: the double-pole self-reset switch S1 is pressed, and a high-level action signal (24V+) is output to an I / O input port of the controller in the load system through the first signal line shown in line number 1. At the same time, the coil of the contactor KM1 and the coil of the intermediate relay K1 are energized, wherein the action of the K1 main contact switch realizes the self-locking of the low-voltage signal output (i.e., maintaining the state of 24V+ being electrically conductive to the KM1 contactor coil). The action of the KM1 main contact switch connects the controller circuit, i.e., a first-stage power-on power supply is realized to supply power to the controller of the load system through the second signal line shown in line number 2, and a request action signal is sent to the I / O input port of the controller of the load system through the first signal line shown in line number 1, so that the controller of the load system is energized and starts working, realizing one-key start of the controller.

[0106] Load system bus power-on: After the controller is powered on successfully, press the double-pole self-locking switch S3, and the high-level action signal (24V+) is output to an I / O input port of the controller in the load system through the fourth signal line shown in line number 4. At the same time, the bus control power supply outputs a power signal to the bus contactor coil (i.e., the bus power supply) through the fifth signal line shown in line number 5. The controller of the load system controls the coil (A_K1) to be energized, so that the main contact switch of A_K1 on the bus contactor coil loop is closed, so that the bus contactor coil is energized and connected, and the bus control power is output to the bus contactor coil through the signal line shown in line number 5. After the bus contactor coil is energized, the main contact switch of the bus contactor is closed, and the bus main circuit is turned on.

[0107] That is to say, the bus main circuit includes contactors and relays, which respectively include their own coils and main contact switches. Regarding the contactors on the bus main circuit, Figure 2 Only the coil of the bus contactor is shown, and the main contact switch of the bus contactor is not shown. The load main circuit is the same and will not be described in detail.

[0108] Power on all levels of the load system:

[0109] Take load 1 as an example. After the bus is powered on successfully, press S4, and the high-level action signal (24V+) is output to an I / O input port of the controller in the load system through the signal line shown in line number 6. At the same time, the load 1 control power is output to the contactor coil circuit of load 1 through the signal line shown in line number 7. The controller of the load system controls the coil of A_K2 to be energized, controls the main contact switch of A_K2 to be closed, and thus controls the load contactor coil circuit to be turned on. The load 1 control power is output to the load contactor coil through the signal line shown in line number 7, so that the load 1 contactor coil is energized. After the load 1 contactor coil is energized, the main contact switch of the contactor of load 1 is closed, and the main circuit of load 1 is turned on.

[0110] The power-on of other loads is similar and will not be described in detail. In the embodiment of the present application, several additional loads can be added according to actual needs to realize the power-on control of more levels of loads. For example, when adding the nth load, the switch Sm and the signal line (line number p) of the action signal of the nth load can be added at the same time, where m, n, and p represent integers greater than 1.

[0111] Power-off process:

[0112] Sm...-S6-S4-S3 power off: When S3 (used to control the switch of the bus in the load system), S4 (used to control the switch of the first load in the load system), S6 (used to control the switch of the second load in the load system)...Sm (used to control the switch of the nth load in the load system) are actuated, an action signal (i.e., a power-off action request signal) is transmitted to the controller in the load system, and the line numbers of the signal lines of the action signals correspond to line number 4, line number 6, line number 9...line number p, respectively, thereby performing power-off control of loads and busbars at all levels.

[0113] In some embodiments, when power is required to be turned off, the operation of closing the switch can be performed step by step in the order of Sm...-S6-S4-S3, and the power-off action request signal is transmitted to the controller in the load system. The controller controls A_K(n+1)...A_K3, A_K2, A_K1 to disconnect the coil circuits of the contactors of each level of load and bus, so that the power supply of the power supply system (i.e., the battery shown in the figure) cannot be connected to the coil of the corresponding contactor, thereby disconnecting the corresponding contactor and completing the step-by-step power off. The power-off sequence can be controlled by the controller of the load system, so as to ensure that the power is gradually turned off in the order of the nth load...-the second load-the first load-the bus.

[0114] Normal one-button power-off: Press the double-pole self-reset switch S1 (i.e., as a normal one-button power-off function switch, after one-button start, if S1 is pressed again, the loads and busbars at all levels will be automatically powered off step by step, but the controller will not be powered off and can continue to monitor the load system). An action signal can be sent to the controller, and the controller will automatically power off step by step. Specifically, after pressing the double-pole self-reset switch S1, the controller will control the A_K(n+1)...A_K3, A_K2, A_K1 of the I / O output port in sequence, so that the coil circuits of the contactors of the loads and busbars at all levels are de-energized, thereby disconnecting the main contact switches of the corresponding contactors, and completing the automatic one-button power-off of the loads and busbars at all levels.

[0115] Emergency power off: Use power supply system control circuit power off and load system controller control power off for double insurance. Specifically:

[0116] Emergency power off of load: In an emergency, press the single-pole self-resetting switch S5, the coil of relay K5 is energized, the main contact switch of relay K5 is disconnected, the coil of relay K4 is de-energized, and the main contact switch of relay K4 is disconnected. Regardless of whether the controller of the load system controls the load circuit to be disconnected, the power supply system end has been powered off, thereby ensuring that the coil of the contactor of the load circuit is de-energized and disconnected, and the load is powered off.

[0117] Bus emergency power off: In an emergency, disconnect the double-pole self-locking switch S3. Regardless of whether the load system controller controls the bus circuit to be disconnected, the power supply system end has been powered off, thereby ensuring that the coil of the contactor in the bus circuit is de-energized, the corresponding main contact switch is disconnected, and the bus is powered off.

[0118] Emergency one-button power-off of the controller, busbar, and loads at all levels: In an emergency, press the single-pole self-resetting switch S2 (also known as the emergency one-button power-off switch), the coil of relay K2 is energized, the main contact switch of relay K2 is disconnected, the coil of contactor KM1 is de-energized, and the corresponding main contact switch of KM1 is disconnected, so that the controller, busbar, and loads at all levels are all powered off. That is, through the single-pole self-resetting switch S2, a complete power-off between the one-button control circuit and the load system can be achieved.

[0119] It can be seen that the normal one-button power-off switch (S1) described in the embodiment of the present application can realize one-button power-off of the busbar and each level of load in the load system; the emergency one-button power-off switch (S2) described in the embodiment of the present application can realize one-button power-off of the controller, busbar, and each level of load in the load system.

[0120] It should be noted that for a normally closed switch, such as relay K2, the coil of relay K2 is energized and the main contact switch of relay K2 is opened. If it is a normally open switch, such as relay K1, the coil of relay K1 is energized and the main contact switch of relay K1 is closed.

[0121] In addition, when an emergency occurs, the controller of the load system can directly drive the coils of relays K5 and K2 in the control circuit through the signal lines shown by line numbers 8 and line numbers 3, respectively, to energize the main contacts of relays K5 and K2, thereby disconnecting the main contacts of relays K5 and K2, and forming a double power-off insurance with the above-mentioned manual emergency power-off (pressing the single-pole self-resetting switch S2 and disconnecting the single-pole self-resetting switch S5).

[0122] In summary, see Figure 7The control circuit provided in the embodiment of the present application is used to control the power on and off of a load system, wherein the load system includes a controller (such as a BMS, or other controllers such as a PLC), a bus and a load (at least one), and the control circuit includes: a power supply, and multiple circuits electrically connected to the power supply; wherein the multiple circuits include: a first circuit for controlling the power on and off of the controller in the load system, a second circuit for controlling the power on and off of the bus in the load system, and a third circuit for controlling the power on and off of the load in the load system (the circuits corresponding to each level of load are called third circuits, that is, there can be multiple third circuits, each third circuit corresponding to a first level of load).

[0123] In an embodiment of the present application, by setting a plurality of circuits (i.e., the first circuit, the second circuit, and the third circuit) in the control circuit for controlling the controller, the bus, and the load in the load system, the conduction and disconnection of the circuits of the controller, the bus, and the loads at each level in the load system are controlled separately, thereby greatly improving the reliability of power supply to the load system, especially the reliability of power supply to the bus and the loads therein. Therefore, it can be widely used in scenarios with high requirements for power supply reliability and scenarios requiring multi-level power on and off control.

[0124] In some embodiments, in order to power on the controller, the first circuit includes: a first switch device, a second switch device, a third switch device, a first signal line, and a second signal line;

[0125] The first switch device is, for example, the above-mentioned double-pole self-resetting switch S1 (also called a one-button start switch and a normal one-button power-off switch).

[0126] The second switching device, for example, the above-mentioned KM1.

[0127] The third switch device is, for example, the above-mentioned K1 (normally open).

[0128] The first signal line, for example, the signal line indicated by line number 1 above;

[0129] The second signal line is, for example, the signal line indicated by line number 2 above.

[0130] Wherein, the first switch device includes a first switch and a second switch; the second switch device and the third switch device each include a coil and a main contact switch;

[0131] The main contact switch of the second switching device is connected between the positive electrode of the power supply and the first node (for example, the connection point between the first switch of S1 and the main contact switch of KM1), the first switch of the first switching device is connected to the first node and one end of the first signal line, the other end of the first signal line is used to be electrically connected to an input port of the controller, and the second switch of the first switching device is connected in parallel with the main contact switch of the third switching device;

[0132] The coil of the second switching device is connected in parallel with the coil of the third switching device, and one end of the coil is electrically connected to the negative electrode of the power supply, and the other end of the coil is electrically connected to one end of the main contact switch of the third switching device, and the other end of the main contact switch of the third switching device is electrically connected to the positive electrode of the power supply;

[0133] One end of the second signal line is electrically connected to the first node, and the other end is used to be electrically connected to the positive electrode of the power supply of the controller.

[0134] It can be seen that if the first switch device is pressed, a high-level action signal (for example, 24V) is output on the first signal line, and at the same time, the coils of the second switch device and the third switch device are energized, so that the main contact switch of the third switch device is actuated, realizing the self-locking of the low-voltage signal output, and the main contact switch of the second switch device is actuated, so that the low-voltage output circuit (the second signal line) is connected, so that the controller of the load system is energized and starts working, realizing the one-button start function of the controller.

[0135] In some embodiments, in order to power off the controller, the first circuit further includes: a fourth switch device, a fifth switch device and a third signal line;

[0136] The fourth switch device is, for example, the above-mentioned single-pole self-resetting switch S2 (also called an emergency one-button power-off switch);

[0137] The fifth switch device, for example, the intermediate relay K2;

[0138] The third signal line is, for example, the signal line indicated by line number 3 above.

[0139] The fourth switch device is connected between the first node and one end of the third signal line, and the other end of the third signal line is used to be electrically connected to an output port of the controller;

[0140] The fifth switch device includes a coil and a main contact switch. The coil of the fifth switch device is connected between the negative electrode of the power supply and the connection point between the fourth switch device and the third signal line. The main contact switch of the third switch device is connected to the coil of the second switch device and the coil of the third switch device through the main contact switch of the fifth switch device (for example, Figure 3 The main contact switch of K2 shown is connected in series with the main contact switch of K1, and between the parallel-connected K1 coil and KM1 coil).

[0141] It can be seen that in an emergency situation, if the fourth switch device is pressed, the coil of the fifth switch device is energized, and the main contact switch of the fifth switch device is disconnected, causing the coil of the second switch device to lose power, and the main contact switch of the second switch device is disconnected (that is, the first node and the positive electrode of the power supply are disconnected), thereby causing the controller, bus, and loads at all levels in the load system to lose power. Therefore, the control circuit has an emergency one-button power-off function.

[0142] In some embodiments, in order to realize powering on and off the bus, the second circuit includes: a sixth switch device, a fourth signal line, and a fifth signal line;

[0143] The sixth switch device is, for example, the double-pole self-locking switch S3;

[0144] The fourth signal line, for example, the signal line indicated by line number 4 above;

[0145] The fifth signal line is, for example, the signal line indicated by line number 5 above.

[0146] Wherein, the sixth switch device includes a first self-locking switch and a second self-locking switch, wherein the first self-locking switch is connected between the first node and one end of the fourth signal line, and the other end of the fourth signal line is used to be electrically connected to an input port of the controller; the second self-locking switch is connected between the first node and one end of the fifth signal line, and the other end of the fifth signal line is used to be electrically connected to a switch in the load system for controlling the on and off of the bus circuit (for example, the main contact switch of the relay A_K1 in the above-mentioned load system). The switch for controlling the on and off of the bus circuit described in the embodiment of the present application can also be more specifically described as a switch for controlling the on and off of the bus contactor coil power circuit.

[0147] It can be seen that when the sixth switch device is closed, the fourth signal line inputs an action signal to the controller, and under the control of the controller, the coil of the switch used to control the conduction and disconnection of the bus circuit is energized, thereby triggering the main contact switch of the switch used to control the conduction and disconnection of the bus circuit to close, and the bus contactor coil circuit is turned on, so that the power signal output through the fifth signal line is turned on to the bus contactor coil, the main contact is closed, and the bus is powered on;

[0148] In the case of an emergency power-off of the bus, the sixth switching device is disconnected. Regardless of whether the controller of the load system controls the bus contactor coil circuit to be disconnected, the power supply system end has been powered off, thereby ensuring that the contactor coil of the bus circuit is de-energized, the corresponding main contact switch is disconnected, and the bus is powered off. In other words, in addition to the BMS, the control circuit provided in the embodiment of the present application can also form a double insurance for bus power off, ensuring that the power supply provided to the bus is reliably cut off, thereby greatly improving the power supply reliability of the bus and reducing the risk of loss of control.

[0149] In some embodiments, in order to realize load power-on, the third circuit includes: a seventh switch device, an eighth switch device, a ninth switch device, a sixth signal line and a seventh signal line;

[0150] The seventh switch device, for example, the double-pole self-resetting switch S4;

[0151] The eighth switching device, for example, the intermediate relay K3;

[0152] The ninth switch device, for example, the intermediate relay K4;

[0153] The sixth signal line, for example, the signal line indicated by line number 6 above;

[0154] The seventh signal line is, for example, the signal line indicated by line number 7 above.

[0155] Wherein, the seventh switch device includes a first switch and a second switch; the eighth switch device and the ninth switch device both include a coil and a main contact switch;

[0156] The first switch of the seventh switch device is connected between the first node and one end of the sixth signal line, the other end of the sixth signal line is used to be electrically connected to an input port of the controller, and the second switch of the seventh switch device is connected in parallel with the main contact switch of the eighth switch device;

[0157] The main contact switch of the ninth switch device is connected between the first node and one end of the seventh signal line, and the other end of the seventh signal line is used to be electrically connected to a switch in the load system for controlling the on and off of the load circuit (for example, the main contact switch of the relay A_K2 in the above-mentioned load system); the switch for controlling the on and off of the load circuit described in the embodiment of the present application can also be more specifically described as a switch for controlling the on and off of the load contactor coil power circuit;

[0158] The coil of the eighth switching device and the coil of the ninth switching device are connected in parallel between the negative electrode of the power supply and one end of the main contact switch of the eighth switching device, and the other end of the main contact switch of the eighth switching device is electrically connected to the first node.

[0159] It can be seen that when the seventh switch device is closed, the sixth signal line outputs an action signal to the controller in the load system. Under the control of the controller, the coil of the switch for controlling the on and off of the load circuit is energized, and the corresponding main contact switch is closed. At the same time, since the seventh switch device is closed, the coil of the ninth switch device is energized, and the corresponding main contact switch of the ninth switch device is closed. Therefore, the load contactor coil circuit is turned on, so that the power signal can be output to the load contactor coil through the seventh signal line, the corresponding load contactor main contact switch is closed, and the load is powered on.

[0160] Further, in some embodiments, in order to realize load power-off, the third circuit further includes: a tenth switch device, an eleventh switch device and an eighth signal line;

[0161] The tenth switch device is, for example, the single-pole self-resetting switch S5;

[0162] The eleventh switch device, for example, the intermediate relay K5;

[0163] The eighth signal line, for example, the signal line indicated by line number 8 above;

[0164] The tenth switch device is connected between the first node and one end of the eighth signal line, and the other end of the eighth signal line is used to be electrically connected to an output port of the controller;

[0165] The eleventh switch device includes a coil and a main contact switch; wherein the coil of the eleventh switch device is connected between the negative electrode of the power supply and the connection point between the tenth switch device and the eighth signal line; the main contact switch of the eighth switch device is connected to the coil of the eighth switch device and the coil of the ninth switch device through the main contact switch of the eleventh switch device (for example, Figure 3K5 is shown as being connected between the main contact switch of K3 and the coils of K3 and K4 in parallel).

[0166] It can be seen that when the load is urgently powered off, the tenth switch device is pressed, the coil of the eleventh switch device is energized, and the corresponding main contact switch (normally closed) of the eleventh switch device is disconnected, causing the coil of the ninth switch device to lose power, and the corresponding main contact switch (normally open) of the ninth switch device is disconnected, thereby causing the seventh signal line to be unable to output a power signal. Therefore, regardless of whether the controller of the load system controls the load circuit to be disconnected, the power supply system end has been powered off, thereby ensuring that the load circuit is disconnected and the load is powered off. In other words, the control circuit provided in the embodiment of the present application controls the load power off, and the controller in the load system controls the load power off, forming a double insurance to ensure that the power supply provided to the load is reliably cut off.

[0167] In some embodiments, when the load system includes other loads in addition to the load (that is, it may include multi-stage loads), the third circuit also includes power-on control switches of the other loads (such as the above-mentioned single-pole self-reset switches S6 to Sm, etc.) and signal lines corresponding to the other loads (such as the signal lines shown by the above-mentioned line numbers 9 to p);

[0168] The power-on control switch of the other load is connected between the first node and one end of the signal line corresponding to the other load, and the other end of the signal line corresponding to the other load is used to be electrically connected to an input port of the controller.

[0169] An embodiment of the present application provides a power supply system, comprising any of the above-mentioned control circuits.

[0170] A load system provided in the embodiment of the present application can be found in Figure 2 and Figure 6 As shown, it includes a controller, a bus and a load, and a circuit structure for being set corresponding to any of the control circuits described above, and the circuit structure can achieve the following functions:

[0171] The controller can be electrically connected to the first circuit in the control circuit and controlled by the first circuit to realize power on and off of the controller;

[0172] The busbar can be electrically connected to the second circuit in the control circuit and controlled by the second circuit to realize power on and off of the busbar;

[0173] The load can be electrically connected to the third circuit in the control circuit and controlled by the third circuit to realize power on and off of the load.

[0174] In some embodiments, the circuit structure includes a first signal line, a second signal line, and a third signal line, for example, Figure 6The signal lines shown as line number 1, line number 2, and line number 3;

[0175] Wherein, one end of the first signal line in the circuit structure is used to be electrically connected to the first signal line in the first circuit, and the other end is electrically connected to an input port of the controller;

[0176] One end of the second signal line in the circuit structure is used to be electrically connected to the second signal line in the first circuit, and the other end is electrically connected to the positive electrode of the power supply of the controller;

[0177] One end of the third signal line in the circuit structure is used to be electrically connected to the third signal line in the first circuit, and the other end is electrically connected to an output port of the controller.

[0178] In some embodiments, the circuit structure further includes a switch for controlling the on and off of the bus loop, a fourth signal line and a fifth signal line, for example, Figure 6 Relay A_K1, line number 4, signal line number 5 shown;

[0179] Wherein, one end of the fourth signal line in the circuit structure is used to be electrically connected to the fourth signal line in the second circuit, and the other end is electrically connected to an input port of the controller;

[0180] One end of the fifth signal line in the circuit structure is used to be electrically connected to the fifth signal line in the second circuit, and the other end is electrically connected to the switch for controlling the on and off of the bus loop.

[0181] In some embodiments, the circuit structure further includes a bus loop contactor;

[0182] The switch for controlling the on and off of the bus circuit includes a first relay, wherein the coil of the first relay is connected between two output ports of the controller, one end of the main contact switch of the first relay is electrically connected to the fifth signal line in the circuit structure, and the other end is electrically connected to the coil of the bus circuit contactor.

[0183] In some embodiments, the circuit structure further includes a switch for controlling the on and off of the load loop, a sixth signal line, a seventh signal line and an eighth signal line, for example, respectively. Figure 6 The relay A_K2, line number 6, line number 7, and signal lines shown in line number 8 are shown;

[0184] Wherein, one end of the sixth signal line in the circuit structure is used to be electrically connected to the sixth signal line in the third circuit, and the other end is electrically connected to an input port of the controller;

[0185] One end of the seventh signal line in the circuit structure is used to be electrically connected to the seventh signal line in the third circuit, and the other end is electrically connected to the switch for controlling the on and off of the load circuit;

[0186] One end of the eighth signal line in the circuit structure is used to be electrically connected to the eighth signal line in the third circuit, and the other end is electrically connected to an output port of the controller.

[0187] In some embodiments, the circuit structure further includes a load contactor;

[0188] The switch for controlling the on and off of the load circuit includes a second relay, wherein the coil of the second relay is connected between the two output ports of the controller, one end of the main contact switch of the second relay is electrically connected to the seventh signal line in the circuit structure, and the other end is electrically connected to the coil of the load contactor.

[0189] Similarly, when there are multiple loads, corresponding switching devices (relays, contactors, etc.) and signal lines can be added, such as the relay A_K3 on the load 2 circuit shown in 6 and the signal line shown by line number 9. The principle is the same as that of load 1 and will not be repeated here.

[0190] In some embodiments, when the controller determines that the loads and the bus in the load system need to be powered off normally, the controller controls the loads and the bus in the load system to power off in a preset order.

[0191] For example, when the controller receives an action signal from the user operating the normal one-button power-off switch S1, it determines that the loads and buses in the load system need to be powered off normally, and controls the loads and buses in the load system to be powered off in a preset order. The preset order can be set according to actual needs and is not limited in the embodiments of the present application. The preset order, for example, performs power-off control in the following order: load n...load 3, load 2, load, bus. The power-off control, for example, see Figure 6 , and control A_K(n+1)…A_K3, A_K2, A_K1 of the I / O output port in sequence to realize the power-off of load n…load 3, load 2, load, and bus in sequence.

[0192] In some embodiments, when the controller determines that the entire load system needs to be powered off with one key in an emergency, it sends a control signal to the control circuit through the third signal line in the circuit structure, thereby disconnecting the power between the control circuit and the load system.

[0193] For example, when the first preset condition is met, the controller determines that the load system as a whole needs to be powered off with one button in an emergency. The first preset condition can be determined according to actual needs. For example, it can be an instruction signal sent by the user received by the controller through the user interface, or it can be other trigger conditions such as time and events.

[0194] A control signal is sent to the control circuit via the third signal line in the circuit structure. For example, the I / O output port connected to the third signal line shown by line number 3 sends a control signal, so that S2 in the control circuit is disconnected. The details are not repeated here.

[0195] In some embodiments, when the controller determines that the load needs to be powered off urgently, it sends a control signal to the control circuit through the eighth signal line in the load system, so that the third circuit in the control circuit is disconnected and the load is powered off.

[0196] For example, when the second preset condition is met, the controller determines that the load needs to be powered off urgently. Similar to the first preset condition, the second preset condition can also be determined according to actual needs. For example, it can be an indication signal sent by the user received by the controller through the user interface, or it can be other trigger conditions such as time, event, etc.

[0197] An electric energy system provided in an embodiment of the present application includes the power supply system described above, and any of the load systems described above.

[0198] In addition, in addition to the various functions of the above-mentioned control circuit, the electric energy system also has an electrical interlocking function, that is, when the control circuit controls the load system to power on, the corresponding switches in the order of "controller-bus-load 1-load 2-...load n" in the load system must be operated step by step to power on smoothly. If the previous step of power-on is not completed, the subsequent steps cannot be powered on, thereby ensuring electrical safety and avoiding misoperation.

[0199] An electric vehicle provided in an embodiment of the present application includes the electric energy system. The electric vehicle may be, for example, various types of vehicles that need to be provided with the electric energy system provided in the embodiment of the present application, which will not be described in detail here.

[0200] In summary, the technical solutions and corresponding beneficial effects provided by the embodiments of the present application include:

[0201] 1. See Figure 8 The power supply in the power supply system can provide multiple levels of power supply and realize multi-level power on and off control.

[0202] 2. Realize the mode of "power supply system supplies power → controller works → power supply system provides multi-speed power supply, controller controls the load main circuit bus and coil circuit of contactor of each level of load circuit is turned on → load main circuit bus and each level of load circuit is turned on", that is, the control circuit in the power supply system and the controller in the load system jointly realize the power on / off of the control bus and each level of load.

[0203] 3. Realize one-key start and one-key power-off functions (including normal one-key power-off function and emergency one-key power-off function).

[0204] 4. In case of emergency, the double insurance power-off solution of "power supply system cuts off power supply + controller control circuit disconnects" can ensure that the power supply is reliably cut off.

[0205] 5. Realize the electrical interlocking function of the control circuit. When powering on, the operation must be carried out in the order of "controller-bus-first load-second load-...nth load" to successfully power on. If the previous step of powering on is not completed, the subsequent steps cannot be powered on, thus ensuring electrical safety and avoiding misoperation.

[0206] Therefore, the technical solution provided by the embodiment of the present application greatly improves the power supply reliability of the load system and reduces the risk of loss of control. It can be widely used in occasions with high requirements for power supply reliability and occasions requiring multi-level power up and down control, improving the user experience and power supply reliability.

[0207] The multi-level power supply control system control circuit provided in the embodiment of the present application can be widely used in various occasions requiring multi-level power supply, such as vehicle power supply, special vehicle power supply, special equipment power supply in the new energy industry, control power supply in the industrial automation industry, power supply for different loads in the instrumentation industry, etc. At the same time, according to actual application needs, improvements can be made on the basis of the above embodiments, and simplification can be made on the basis of the control circuit to achieve a simpler power supply control circuit.

[0208] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A control circuit in a power supply system, used to control the power on and off of a load system, wherein the load system includes a controller, a bus and a load, characterized in that: The control circuit includes: a power supply, and a plurality of circuits electrically connected to the power supply; wherein the plurality of circuits include: a first circuit for controlling power on and off of a controller in the load system, a second circuit for controlling power on and off of a bus in the load system, and a third circuit for controlling power on and off of a load in the load system; Wherein, the first circuit includes: a first switch device, a second switch device, a third switch device, a first signal line, and a second signal line; Wherein, the first switch device includes a first switch and a second switch; the second switch device and the third switch device each include a coil and a main contact switch; The main contact switch of the second switching device is connected between the positive electrode of the power supply and the first node, the first switch of the first switching device is connected to the first node and one end of the first signal line, the other end of the first signal line is used to be electrically connected to an input port of the controller, and the second switch of the first switching device is connected in parallel with the main contact switch of the third switching device; The coil of the second switching device is connected in parallel with the coil of the third switching device, and one end of the coil is electrically connected to the negative electrode of the power supply, and the other end of the coil is electrically connected to one end of the main contact switch of the third switching device, and the other end of the main contact switch of the third switching device is electrically connected to the positive electrode of the power supply; One end of the second signal line is electrically connected to the first node, and the other end is used to be electrically connected to the positive electrode of the power supply of the controller.

2. The control circuit according to claim 1, characterized in that: The first circuit further includes: a fourth switch device, a fifth switch device and a third signal line; The fourth switch device is connected between the first node and one end of the third signal line, and the other end of the third signal line is used to be electrically connected to an output port of the controller; The fifth switching device includes a coil and a main contact switch, the coil of the fifth switching device is connected between the negative electrode of the power supply and the connection point between the fourth switching device and the third signal line; the main contact switch of the third switching device is connected to the coil of the second switching device and the coil of the third switching device through the main contact switch of the fifth switching device.

3. The control circuit according to claim 1, characterized in that: The second circuit includes: a sixth switch device, a fourth signal line and a fifth signal line; Among them, the sixth switching device includes a first self-locking switch and a second self-locking switch, the first self-locking switch is connected between the first node and one end of the fourth signal line, and the other end of the fourth signal line is used to be electrically connected to an input port of the controller; the second self-locking switch is connected between the first node and one end of the fifth signal line, and the other end of the fifth signal line is used to be electrically connected to a switch in the load system for controlling the conduction and disconnection of the bus loop.

4. The control circuit according to claim 1, characterized in that: The third circuit includes: a seventh switch device, an eighth switch device, a ninth switch device, a sixth signal line and a seventh signal line; Wherein, the seventh switch device includes a first switch and a second switch; the eighth switch device and the ninth switch device both include a coil and a main contact switch; The first switch of the seventh switch device is connected between the first node and one end of the sixth signal line, the other end of the sixth signal line is used to be electrically connected to an input port of the controller, and the second switch of the seventh switch device is connected in parallel with the main contact switch of the eighth switch device; The main contact switch of the ninth switch device is connected between the first node and one end of the seventh signal line, and the other end of the seventh signal line is used to be electrically connected to a switch in the load system for controlling the on and off of a load circuit; The coil of the eighth switching device and the coil of the ninth switching device are connected in parallel between the negative electrode of the power supply and one end of the main contact switch of the eighth switching device, and the other end of the main contact switch of the eighth switching device is electrically connected to the first node.

5. The control circuit according to claim 4, characterized in that: The third circuit further includes: a tenth switch device, an eleventh switch device and an eighth signal line; The tenth switch device is connected between the first node and one end of the eighth signal line, and the other end of the eighth signal line is used to be electrically connected to an output port of the controller; The eleventh switching device includes a coil and a main contact switch; wherein the coil of the eleventh switching device is connected between the negative electrode of the power supply and the connection point between the tenth switching device and the eighth signal line; the main contact switch of the eighth switching device is connected to the coil of the eighth switching device and the coil of the ninth switching device through the main contact switch of the eleventh switching device.

6. The control circuit according to claim 1, characterized in that: When the load system includes other loads in addition to the load, the third circuit also includes a power-on control switch of the other load and a signal line corresponding to the other load; The power-on control switch of the other load is connected between the first node and one end of the signal line corresponding to the other load, and the other end of the signal line corresponding to the other load is used to be electrically connected to an input port of the controller.

7. A power supply system, characterized in that: The control circuit comprises the control circuit according to any one of claims 1 to 6.

8. A load system, characterized in that: It comprises a controller, a bus and a load, and a circuit structure configured to correspond to the control circuit according to any one of claims 1 to 6.

9. The load system according to claim 8, characterized in that: The circuit structure includes a first signal line, a second signal line, and a third signal line; Wherein, one end of the first signal line in the circuit structure is used to be electrically connected to the first signal line in the first circuit, and the other end is electrically connected to an input port of the controller; One end of the second signal line in the circuit structure is used to be electrically connected to the second signal line in the first circuit, and the other end is electrically connected to the positive electrode of the power supply of the controller; One end of the third signal line in the circuit structure is used to be electrically connected to the third signal line in the first circuit, and the other end is electrically connected to an output port of the controller.

10. The load system according to claim 9, characterized in that: The circuit structure also includes a switch for controlling the on and off of the bus loop, a fourth signal line and a fifth signal line; Wherein, one end of the fourth signal line in the circuit structure is used to be electrically connected to the fourth signal line in the second circuit, and the other end is electrically connected to an input port of the controller; One end of the fifth signal line in the circuit structure is used to be electrically connected to the fifth signal line in the second circuit, and the other end is electrically connected to the switch for controlling the on and off of the bus loop.

11. The load system according to claim 10, characterized in that: The circuit structure further includes a switch for controlling the on and off of the load loop, a sixth signal line, a seventh signal line and an eighth signal line; Wherein, one end of the sixth signal line in the circuit structure is used to be electrically connected to the sixth signal line in the third circuit, and the other end is electrically connected to an input port of the controller; One end of the seventh signal line in the circuit structure is used to be electrically connected to the seventh signal line in the third circuit, and the other end is electrically connected to the switch for controlling the on and off of the load circuit; One end of the eighth signal line in the circuit structure is used to be electrically connected to the eighth signal line in the third circuit, and the other end is electrically connected to an output port of the controller.

12. The load system according to claim 11, characterized in that: When the controller determines that the loads and buses in the load system need to be powered off normally, the controller controls the loads and buses in the load system to be powered off in a preset order; When the controller determines that the entire load system needs to be powered off with one key in an emergency, the controller sends a control signal to the control circuit through the third signal line in the circuit structure, so that the control circuit and the load system are powered off; When the controller determines that the load needs to be powered off urgently, it sends a control signal to the control circuit through the eighth signal line in the load system, so that the third circuit in the control circuit is disconnected and the load is powered off.

13. An electric energy system, characterized in that: It comprises the power supply system according to claim 7, and the load system according to any one of claims 8 to 12.

14. An electric vehicle, characterized in that: Includes the electric energy system as claimed in claim 13.

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