WO2024087062A1

WO2024087062A1 - Power supply circuit, control method for power supply circuit, and energy storage device

Info

Publication number: WO2024087062A1
Application number: PCT/CN2022/127738
Authority: WO
Inventors: 张凯; 赵密; 陈熙; 王雷
Original assignee: 深圳市正浩创新科技股份有限公司
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2024-05-02
Also published as: CN116075999A

Abstract

A power supply circuit, comprising a main switch circuit, a pre-charging switch circuit, a current-limiting circuit, an auxiliary power source circuit and a control circuit, wherein an input end of the main switch circuit and an input end of the pre-charging switch circuit are both connected to an output end of a power supply source, and the output end of the main switch circuit is an output end of the power supply circuit; an output end of the pre-charging switch circuit is connected to an input end of the current-limiting circuit, and an output end of the current-limiting circuit is connected to the output end of the main switch circuit; a power source end of the auxiliary power source circuit is connected between the pre-charging switch circuit and the current-limiting circuit; and an output end of the auxiliary power source circuit is connected to an output end of the control circuit, and the output end of the control circuit is connected to the output end of the power supply circuit.

Description

供电电路、供电电路的控制方法及储能设备Power supply circuit, power supply circuit control method and energy storage device

技术领域Technical Field

本申请涉及电路控制技术领域，尤其涉及一种供电电路、供电电路的控制方法及储能设备。The present application relates to the field of circuit control technology, and in particular to a power supply circuit, a control method for a power supply circuit, and an energy storage device.

背景技术Background technique

这里的陈述仅提供与本申请有关的背景信息，而不必然地构成示例性技术。The statements herein merely provide background information related to the present application and do not necessarily constitute exemplary techniques.

相关设备的供电电路中，通常使用辅助电源电路先唤起设备内部的部分功能模块，并维持在开始供电的一段时间内各功能模块的供电。在部分功能模块工作后，供电电路还通过预充电电路进行预充电，当预充电电路的输出侧的电压提升到目标电压时，通过主供电电路为设备供电，并关闭预充电电路。这样的供电电路元器件较多，控制逻辑较为复杂，这无疑增加了电路成本。In the power supply circuit of related equipment, an auxiliary power supply circuit is usually used to wake up some functional modules inside the equipment first, and maintain the power supply of each functional module for a period of time after the power supply starts. After some functional modules are working, the power supply circuit is also pre-charged through the pre-charging circuit. When the voltage on the output side of the pre-charging circuit is increased to the target voltage, the equipment is powered by the main power supply circuit and the pre-charging circuit is turned off. Such a power supply circuit has more components and the control logic is more complicated, which undoubtedly increases the circuit cost.

发明内容Summary of the invention

根据本申请的各种实施例，提供一种供电电路、供电电路的控制方法及储能设备。According to various embodiments of the present application, a power supply circuit, a control method of the power supply circuit, and an energy storage device are provided.

本申请第一方面提供一种供电电路，包括主开关电路、预充开关电路、限流电路、辅源电路及控制电路。主开关电路的输入端和预充开关电路的输入端均与供电电源的输出端连接，主开关电路的输出端为供电电路的输出端；预充开关电路的输出端与限流电路的输入端连接，限流电路的输出端连接主开关电路的输出端。辅源电路的电源端连接于预充开关电路和限流电路之间。辅源电路的输出端与控制电路的输入端连接。控制电路的输出端与供电电路的输出端连接。预充开关电路被配置为在接收到预充信号时导通。辅源电路被配置为在电源端的输入电压大于使能电压时启动，并在启动后输出启动电压至控制电路以启动控制电路。控制电路被配置为在启动后，检测供电电路的输出电压，并在检测到输出电压上升到预充电压阈值时，输出导通信号至主开关电路。主开关电路被配置为在接收到导通信号时导通，以使得供电电源通过供电电路的输出端供电。The first aspect of the present application provides a power supply circuit, including a main switch circuit, a pre-charge switch circuit, a current limiting circuit, an auxiliary source circuit and a control circuit. The input end of the main switch circuit and the input end of the pre-charge switch circuit are both connected to the output end of the power supply, and the output end of the main switch circuit is the output end of the power supply circuit; the output end of the pre-charge switch circuit is connected to the input end of the current limiting circuit, and the output end of the current limiting circuit is connected to the output end of the main switch circuit. The power supply end of the auxiliary source circuit is connected between the pre-charge switch circuit and the current limiting circuit. The output end of the auxiliary source circuit is connected to the input end of the control circuit. The output end of the control circuit is connected to the output end of the power supply circuit. The pre-charge switch circuit is configured to be turned on when a pre-charge signal is received. The auxiliary source circuit is configured to start when the input voltage of the power supply end is greater than the enable voltage, and output the start-up voltage to the control circuit after starting to start the control circuit. The control circuit is configured to detect the output voltage of the power supply circuit after starting, and output a conduction signal to the main switch circuit when the output voltage is detected to rise to the pre-charge voltage threshold. The main switch circuit is configured to be turned on when a conduction signal is received, so that the power supply is supplied through the output end of the power supply circuit.

本申请第二方面提供一种供电电路的控制方法，供电电路包括主开关电路、预充开关电路、限流电路、辅源电路及控制电路；主开关电路的输入端和预充开关电路的输入端均与供电电源的输出端连接，主开关电路的输出端为供电电路的输出端；预充开关电路的输出端与限流电路的输入端连接，限流电路的输出端连接主开关电路的输出端；辅源电路的电源端连接于预充开关电路和限流电路之间；辅源电路的输出端与控制电路的输出端连接；控制电路的输出端与供电电路的输出端连接；预充开关电路被配置为在接收到预充信号时导通；辅源电路被配置为在电源端的输入电压大于使能电压时启动，并在启动后输出启动电压至控制电路以启动控制电路；控制电路被配置为在启动后执行控制方法，控制方法包括：The second aspect of the present application provides a control method for a power supply circuit, the power supply circuit comprising a main switch circuit, a pre-charge switch circuit, a current limiting circuit, an auxiliary source circuit and a control circuit; the input end of the main switch circuit and the input end of the pre-charge switch circuit are both connected to the output end of the power supply, and the output end of the main switch circuit is the output end of the power supply circuit; the output end of the pre-charge switch circuit is connected to the input end of the current limiting circuit, and the output end of the current limiting circuit is connected to the output end of the main switch circuit; the power supply end of the auxiliary source circuit is connected between the pre-charge switch circuit and the current limiting circuit; the output end of the auxiliary source circuit is connected to the output end of the control circuit; the output end of the control circuit is connected to the output end of the power supply circuit; the pre-charge switch circuit is configured to be turned on when a pre-charge signal is received; the auxiliary source circuit is configured to start when the input voltage of the power supply end is greater than the enable voltage, and after starting, outputs a start voltage to the control circuit to start the control circuit; the control circuit is configured to execute a control method after starting, and the control method includes:

检测供电电路输出端的输出电压；Detecting the output voltage at the output end of the power supply circuit;

在检测到输出电压上升到预充电压阈值时，输出导通信号至主开关电路；导通信号被配置为导通主开关电路，以使得供电电源通过供电电路的输出端供电。When it is detected that the output voltage rises to the pre-charge voltage threshold, a turn-on signal is output to the main switch circuit; the turn-on signal is configured to turn on the main switch circuit so that the power supply is supplied through the output end of the power supply circuit.

本申请第三方面提供一种储能设备，包括电池模块和如上任一项所述的供电电路。A third aspect of the present application provides an energy storage device, comprising a battery module and a power supply circuit as described in any one of the above items.

本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其他特征、目的和优点将从说明书、附图以及权利要求书变得明显。The details of one or more embodiments of the present application are set forth in the following drawings and description. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims.

附图说明BRIEF DESCRIPTION OF THE DRAWINGS

为了更清楚地说明本申请的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对本申请保护范围的限定。在各个附图中，类似的构成部分采用类似的编号。In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope of protection of the present application. In each of the drawings, similar components are numbered similarly.

图1为本申请一实施例提供的供电电路的功能框图。FIG. 1 is a functional block diagram of a power supply circuit provided in an embodiment of the present application.

图2为本申请一实施例提供的供电电路的部分电路图。FIG. 2 is a partial circuit diagram of a power supply circuit provided in an embodiment of the present application.

图3为本申请一实施例提供的供电电路的部分电路图。FIG. 3 is a partial circuit diagram of a power supply circuit provided in an embodiment of the present application.

图4为本申请一实施例提供的储能设备的功能框图。FIG. 4 is a functional block diagram of an energy storage device provided in an embodiment of the present application.

图5为本申请一实施例提供的供电电路的控制方法的流程示意图。FIG5 is a schematic flow chart of a method for controlling a power supply circuit according to an embodiment of the present application.

具体实施方式Detailed ways

下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

需要说明的是，当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time.

除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

下面将结合附图对一些实施例做出说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。Some embodiments will be described below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

相关设备的供电电路中，通常使用辅助电源电路先唤起设备内部的部分功能模块，并维持在开始供电的一段时间内各功能模块的供电。在部分功能模块工作后，供电电路还通过预充电电路进行预充电，以当预充电电路的输出侧的电压提升到目标电压时，通过主供电电路为设备供电，并关闭预充电电路。也即辅助电源电路以及预充电电路会设置有不同的驱动来实现整个设备的供电过程，这样的供电电路元器件较多，控制逻辑较为复杂，这无疑增加了电路成本。In the power supply circuit of the relevant equipment, an auxiliary power supply circuit is usually used to first wake up some functional modules inside the equipment, and maintain the power supply of each functional module for a period of time after the power supply starts. After some functional modules are working, the power supply circuit is also pre-charged through the pre-charging circuit, so that when the voltage on the output side of the pre-charging circuit is increased to the target voltage, the equipment is powered by the main power supply circuit and the pre-charging circuit is turned off. That is, the auxiliary power supply circuit and the pre-charging circuit will be provided with different drivers to realize the power supply process of the entire equipment. Such a power supply circuit has more components and the control logic is more complicated, which undoubtedly increases the circuit cost.

为此，本申请提供一种供电电路200，请参阅图1，具有更加简单的电路结构及控制逻辑，可有效降低制造成本。To this end, the present application provides a power supply circuit 200, please refer to FIG. 1, which has a simpler circuit structure and control logic, and can effectively reduce manufacturing costs.

在一些实施例中，请继续参阅图1，供电电路200包括主开关电路210、预充开关电路220、限流电路230、辅源电路240及控制电路250。其中，主开关电路210连接于供电电源与供电电路200的输出端OUT之间。供电电源可以是储能设备，也可以是具有对外供电功能的电子设备，比如具有加电包的空调、移动小车、割草机等电子设备。In some embodiments, please continue to refer to FIG. 1, the power supply circuit 200 includes a main switch circuit 210, a pre-charge switch circuit 220, a current limiting circuit 230, an auxiliary source circuit 240 and a control circuit 250. Among them, the main switch circuit 210 is connected between the power supply and the output terminal OUT of the power supply circuit 200. The power supply can be an energy storage device, or it can be an electronic device with an external power supply function, such as an air conditioner with a power pack, a mobile car, a lawn mower and other electronic devices.

主开关电路210的输入端和预充开关电路220的输入端均与供电电源的输出端连接，主开关电路210的输出端为供电电路的输出端OUT。预充开关电路220的输出端与限流电路230的输入端连接，限流电路230的输出端连接主开关电路的输出端。辅源电路240的电源端PW连接于预充开关电路220和限流电路230之间。辅源电路240的输出端与控制电路250的输出端连接。控制电路250的输出端与供电电路200的输出端OUT连接。The input end of the main switch circuit 210 and the input end of the pre-charge switch circuit 220 are both connected to the output end of the power supply, and the output end of the main switch circuit 210 is the output end OUT of the power supply circuit. The output end of the pre-charge switch circuit 220 is connected to the input end of the current limiting circuit 230, and the output end of the current limiting circuit 230 is connected to the output end of the main switch circuit. The power supply end PW of the auxiliary source circuit 240 is connected between the pre-charge switch circuit 220 and the current limiting circuit 230. The output end of the auxiliary source circuit 240 is connected to the output end of the control circuit 250. The output end of the control circuit 250 is connected to the output end OUT of the power supply circuit 200.

具体的，预充开关电路220用于在接收到预充信号时导通，以使得在接入供电电源后，供电电源能够通过限流电路230的限流后进行输出，从而使得供电电路200的输出端OUT的电压上升。同时，在预充开关电路220导通后，供电电源也可以经过预充开关电路220后输出至辅源电路240的电源端PW，从而给辅源电路240供电，以唤醒辅源电路240，进而由辅源电路240唤醒控制电路250。Specifically, the pre-charge switch circuit 220 is used to be turned on when receiving the pre-charge signal, so that after the power supply is connected, the power supply can be output after the current limiting circuit 230, thereby increasing the voltage of the output terminal OUT of the power supply circuit 200. At the same time, after the pre-charge switch circuit 220 is turned on, the power supply can also be output to the power supply terminal PW of the auxiliary source circuit 240 after passing through the pre-charge switch circuit 220, thereby supplying power to the auxiliary source circuit 240 to wake up the auxiliary source circuit 240, and then the auxiliary source circuit 240 wakes up the control circuit 250.

其中，预充信号可以由与预充开关电路220连接的外部电路输入的，也可以由芯片根据预设的控制逻辑输入至预充开关电路220中的，在此不做限定。Among them, the pre-charge signal can be input by an external circuit connected to the pre-charge switch circuit 220, or it can be input into the pre-charge switch circuit 220 by the chip according to a preset control logic, which is not limited here.

预充开关电路220导通后，辅源电路240用于在辅源电路240的电源端PW的电压大于使能电压时启动，并在启动后输出启动电压至控制电路250。After the pre-charge switch circuit 220 is turned on, the auxiliary source circuit 240 is used to start when the voltage at the power supply terminal PW of the auxiliary source circuit 240 is greater than the enable voltage, and output the start-up voltage to the control circuit 250 after starting.

例如，供电电源的电压为12V，当预充开关电路220被导通后，由于预充开关电路220上的压降较小，辅源电路240的电源端PW的输入电压近似为12V，而辅源电路240的使能电压若为10V，则辅源电路240将会启动，并再启动后输出启动电压(例如，3.3V)至控制电路250中，以唤醒控制电路250。本实施例中，由于供电电源只需要经过预充开关电路220即可输出至辅源电路240的电源端PW，从而在预充开关电路220导通后，能够及时给辅源电路240供电，从而启动控制电路250。For example, the voltage of the power supply is 12V. When the pre-charging switch circuit 220 is turned on, due to the small voltage drop on the pre-charging switch circuit 220, the input voltage of the power supply terminal PW of the auxiliary source circuit 240 is approximately 12V. If the enable voltage of the auxiliary source circuit 240 is 10V, the auxiliary source circuit 240 will start, and after restarting, it will output a start-up voltage (for example, 3.3V) to the control circuit 250 to wake up the control circuit 250. In this embodiment, since the power supply only needs to pass through the pre-charging switch circuit 220 to be output to the power supply terminal PW of the auxiliary source circuit 240, after the pre-charging switch circuit 220 is turned on, the auxiliary source circuit 240 can be powered in time, thereby starting the control circuit 250.

控制电路250用于在启动后，检测供电电路200的输出端OUT的输出电压，并在检测到输出电压在预设时长内上升到预充电压阈值时，输出导通信号至主开关电路210。The control circuit 250 is used to detect the output voltage of the output terminal OUT of the power supply circuit 200 after startup, and output a conduction signal to the main switch circuit 210 when it is detected that the output voltage rises to the pre-charge voltage threshold within a preset time.

其中，控制电路250可以包括控制芯片和一些***电路。***电路包括电压检测电路，电压检测电路用于检测供电电路200输出端OUT的输出电压，控制芯片则获取电压检测电路检测到的输出电压，并根据预设控制逻辑，输出或者不输出导通信号至主开关电路210中。The control circuit 250 may include a control chip and some peripheral circuits. The peripheral circuits include a voltage detection circuit, which is used to detect the output voltage of the output terminal OUT of the power supply circuit 200. The control chip obtains the output voltage detected by the voltage detection circuit and outputs or does not output a conduction signal to the main switch circuit 210 according to a preset control logic.

主开关电路210用于在接收到导通信号时导通，以使得供电电源通过供电电路200的输出端向连接的负载供电。本实施例通过将辅源电路240的电源端直接连接于预充开关电路220和限流电路230之间，以在预充开关电路220导通后，使得辅源电路240直接唤醒控制电路250，而无需针对辅源电路240设置对应的驱动电路，从而简化电路及电路控制逻辑，降低电路制造成本。同时，预充开关电路220的导通也使得供电电源通过限流电路230，为供电电路200的输出端OUT提供电压，使得供电电路200的输出端OUT得以预充，且当供电电路200的输出端OUT的电压提升至预充电压阈值后，控制电路250可直接导通主开关电路210，从而从预充状态切入正常的供电状态，无需更复杂的驱动控制。并且，本实施例中，主开关电路210在导通后的阻抗较小，从而使得在主开关电路210处于正常状态时，能够将预充开关电路220以及限流电路230进行旁路，从而避免限流电路230一直处于工作状态所带来的功率损耗。另外，由于主开关电路210在导通时，仅仅是将预充开关电路220进行了旁路，当主开关电路210由于异常断开时，由于预充开关电路220仍处于导通状态，则此时供电电源仍能迅速切换至预充开关电路220对供电电路200的输出端OUT进行供电以及辅源电路240进行供电，从而确保电路能够正常工作，提高了电路的稳定性。The main switch circuit 210 is used to be turned on when receiving a turn-on signal, so that the power supply can supply power to the connected load through the output end of the power supply circuit 200. In this embodiment, the power supply end of the auxiliary source circuit 240 is directly connected between the pre-charge switch circuit 220 and the current limiting circuit 230, so that after the pre-charge switch circuit 220 is turned on, the auxiliary source circuit 240 directly wakes up the control circuit 250 without setting a corresponding drive circuit for the auxiliary source circuit 240, thereby simplifying the circuit and circuit control logic and reducing the circuit manufacturing cost. At the same time, the conduction of the pre-charge switch circuit 220 also enables the power supply to provide a voltage to the output end OUT of the power supply circuit 200 through the current limiting circuit 230, so that the output end OUT of the power supply circuit 200 can be pre-charged, and when the voltage of the output end OUT of the power supply circuit 200 is increased to the pre-charge voltage threshold, the control circuit 250 can directly turn on the main switch circuit 210, thereby switching from the pre-charge state to the normal power supply state without the need for more complex drive control. Moreover, in this embodiment, the impedance of the main switch circuit 210 after being turned on is small, so that when the main switch circuit 210 is in a normal state, the pre-charge switch circuit 220 and the current limiting circuit 230 can be bypassed, thereby avoiding the power loss caused by the current limiting circuit 230 being in a working state all the time. In addition, since the main switch circuit 210 only bypasses the pre-charge switch circuit 220 when it is turned on, when the main switch circuit 210 is disconnected due to an abnormality, since the pre-charge switch circuit 220 is still in the on state, the power supply can still quickly switch to the pre-charge switch circuit 220 to supply power to the output terminal OUT of the power supply circuit 200 and the auxiliary source circuit 240, thereby ensuring that the circuit can work normally and improving the stability of the circuit.

在一些实施例中，请继续参考图1，供电电路200还包括驱动电路260。驱动电路260与预充开关电路220电路连接。驱动电路260用于接收预充信号，并对预充信号进行电平转换后输出至预充开关电路220，以驱动预充开关电路220导通。In some embodiments, please continue to refer to FIG. 1 , the power supply circuit 200 further includes a driving circuit 260. The driving circuit 260 is connected to the pre-charge switch circuit 220. The driving circuit 260 is used to receive the pre-charge signal, and output the pre-charge signal to the pre-charge switch circuit 220 after level conversion, so as to drive the pre-charge switch circuit 220 to conduct.

其中，驱动电路260用于对预充信号进行电平转换，例如，对预充信号进行放大后，输出放大后的预充信号输入至预充开关电路220中。可以根据实际电路需求设计驱动电路260。在一实施例中，可以将驱动电路设计为光电耦合型或者磁耦合型的驱动电路，在此不再具体限定。在一些实施例中，请参阅图2，图2为本申请另一实施例中的供电电路200的部分电路图。其中，供电电路200的预充开关电路220的具体电路结构可参考图2中的预充开关电路220。在一些实施例中，预充开关电路220包括第一开关管Q1、第二开关管Q2及分压电阻R1。Among them, the driving circuit 260 is used to perform level conversion on the pre-charge signal. For example, after amplifying the pre-charge signal, the amplified pre-charge signal is output and input into the pre-charge switch circuit 220. The driving circuit 260 can be designed according to actual circuit requirements. In one embodiment, the driving circuit can be designed as a photoelectric coupling type or a magnetic coupling type driving circuit, which is not specifically limited here. In some embodiments, please refer to Figure 2, which is a partial circuit diagram of the power supply circuit 200 in another embodiment of the present application. Among them, the specific circuit structure of the pre-charge switch circuit 220 of the power supply circuit 200 can refer to the pre-charge switch circuit 220 in Figure 2. In some embodiments, the pre-charge switch circuit 220 includes a first switch tube Q1, a second switch tube Q2 and a voltage divider resistor R1.

其中，第一开关管Q1的第一端与供电电源VCC连接，第一开关管Q1的第二端与第二开关管Q2的第二端连接。第二开关管Q2的第一端与限流电路230连接。第一开关管Q1的控制端与第二开关管Q2的控制端连接。分压电阻R1连接于第一开关管Q1的第一端和控制端之间。如此，第一开关管Q1及第二开关管Q2的控制端用于接收驱动电路260进行电平转换后的预充信号EN1，并在接收到该预充信号EN1时导通，以将供电电源输出的电能输出至限流电路230及辅源电路240的电源端PW。第一开关管Q1及第二开关管Q2在未接收到该预充信号EN1时，处于断开状态。Among them, the first end of the first switch tube Q1 is connected to the power supply VCC, and the second end of the first switch tube Q1 is connected to the second end of the second switch tube Q2. The first end of the second switch tube Q2 is connected to the current limiting circuit 230. The control end of the first switch tube Q1 is connected to the control end of the second switch tube Q2. The voltage dividing resistor R1 is connected between the first end and the control end of the first switch tube Q1. In this way, the control ends of the first switch tube Q1 and the second switch tube Q2 are used to receive the pre-charge signal EN1 after the level conversion of the driving circuit 260, and are turned on when receiving the pre-charge signal EN1, so as to output the electric energy output by the power supply to the power supply end PW of the current limiting circuit 230 and the auxiliary source circuit 240. The first switch tube Q1 and the second switch tube Q2 are in a disconnected state when the pre-charge signal EN1 is not received.

在一些实施例中，第一开关管Q1及第二开关管Q2可以为金属-氧化层-半导体-场效晶体管(Metal-Oxide-Semiconductor Field-Effect Transistor，MOSFET)，也可以为绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor，IGBT)。其中，当第一开关管Q1及第二开关管Q2均为P型MOSFET时，第一开关管Q1及第二开关管Q2的第一端为漏极，第一开关管Q1及第二开关管Q2的第二端为源极，第一开关管Q1及第二开关管Q2的控制端为栅极。In some embodiments, the first switch tube Q1 and the second switch tube Q2 may be metal-oxide-semiconductor field-effect transistors (MOSFET) or insulated gate bipolar transistors (IGBT). When the first switch tube Q1 and the second switch tube Q2 are both P-type MOSFETs, the first end of the first switch tube Q1 and the second switch tube Q2 is a drain, the second end of the first switch tube Q1 and the second switch tube Q2 is a source, and the control end of the first switch tube Q1 and the second switch tube Q2 is a gate.

其中，当第一开关管Q1及第二开关管Q2均为P型MOSFET时，驱动电路260接收到的预充信号EN1为高电平，经过电平转换为低电平的预充信号后，使得第一开关管Q1及第二开关管Q2同时导通，以将供电电源输出的电能输出至限流电路230及辅源电路240(图未示，可参见图1)的电源端PW。Among them, when the first switch tube Q1 and the second switch tube Q2 are both P-type MOSFETs, the pre-charge signal EN1 received by the drive circuit 260 is at a high level. After the level is converted into a low-level pre-charge signal, the first switch tube Q1 and the second switch tube Q2 are turned on at the same time to output the electric energy output by the power supply to the power supply terminal PW of the current limiting circuit 230 and the auxiliary source circuit 240 (not shown in the figure, refer to Figure 1).

在一些实施例中，第一开关管Q1及第二开关管Q2均为P型MOSFET，且第一开关管Q1包括寄生二极管D1，第二开关管Q2包括寄生二极管D2。其中，寄生二极管D1的正极连接至第一开关管Q1的漏极，寄生二极管D1的负极连接至第一开关管Q1的源极。寄生二极管D2的正极连接至第二开关管Q2的漏极，寄生二极管D2的负极连接至第二开关管Q2的源极。In some embodiments, the first switch tube Q1 and the second switch tube Q2 are both P-type MOSFETs, and the first switch tube Q1 includes a parasitic diode D1, and the second switch tube Q2 includes a parasitic diode D2. The anode of the parasitic diode D1 is connected to the drain of the first switch tube Q1, and the cathode of the parasitic diode D1 is connected to the source of the first switch tube Q1. The anode of the parasitic diode D2 is connected to the drain of the second switch tube Q2, and the cathode of the parasitic diode D2 is connected to the source of the second switch tube Q2.

在一些实施例中，请继续参阅图2，供电电路200的主开关电路210的具体电路结构可参考图2。其中，主开关电路210包括第三开关管Q3、第四开关管Q4、第一限流电阻R2、第一偏置电阻R3、第二限流电阻R4和第二偏置电阻R5。In some embodiments, please continue to refer to Figure 2, the specific circuit structure of the main switch circuit 210 of the power supply circuit 200 can refer to Figure 2. Among them, the main switch circuit 210 includes a third switch tube Q3, a fourth switch tube Q4, a first current limiting resistor R2, a first bias resistor R3, a second current limiting resistor R4 and a second bias resistor R5.

其中，第三开关管Q3的第一端和第四开关管Q4的第一端连接。第三开关管Q3的第二端用于连接供电电源VCC。第三开关管Q3的控制端连接第一限流电阻R2的第一端。第一限流电阻R2的第二端连接控制电路250,(图未示，可参图1)，以接收控制电路250输出的导通信号EN2。第一偏置电阻R3的第一端连接第一限流电阻R2的第二端，第一偏置电阻R3的第二端连接第三开关管Q3的第二端。第四开关管Q4的第二端与供电电路200的输出端OUT连接。第四开关管Q4的控制端连接第二限流电阻R4的第一端。第二限流电阻R4的第二端连接控制电路250(图未示，可参见图1)。第二偏置电阻R5的第一端连接第二限流电阻R4的第二端。第二偏置电阻R5的第二端与第四开关管Q4的第二端连接。Among them, the first end of the third switch tube Q3 is connected to the first end of the fourth switch tube Q4. The second end of the third switch tube Q3 is used to connect the power supply VCC. The control end of the third switch tube Q3 is connected to the first end of the first current limiting resistor R2. The second end of the first current limiting resistor R2 is connected to the control circuit 250 (not shown in the figure, refer to Figure 1) to receive the conduction signal EN2 output by the control circuit 250. The first end of the first bias resistor R3 is connected to the second end of the first current limiting resistor R2, and the second end of the first bias resistor R3 is connected to the second end of the third switch tube Q3. The second end of the fourth switch tube Q4 is connected to the output end OUT of the power supply circuit 200. The control end of the fourth switch tube Q4 is connected to the first end of the second current limiting resistor R4. The second end of the second current limiting resistor R4 is connected to the control circuit 250 (not shown in the figure, refer to Figure 1). The first end of the second bias resistor R5 is connected to the second end of the second current limiting resistor R4. The second end of the second bias resistor R5 is connected to the second end of the fourth switch tube Q4.

其中，第一限流电阻R2的第二端和第二限流电阻R4的第二端用于接收控制电路250(图未示，可参图1)输出的导通信号EN2。如此，第三开关管Q3和第四开关管Q4在接收到导通信号EN2时导通，以使得供电电源VCC通过供电电路200的输出端OUT供电。The second end of the first current limiting resistor R2 and the second end of the second current limiting resistor R4 are used to receive the conduction signal EN2 output by the control circuit 250 (not shown, refer to FIG. 1 ). In this way, the third switch tube Q3 and the fourth switch tube Q4 are turned on when receiving the conduction signal EN2, so that the power supply VCC is supplied through the output terminal OUT of the power supply circuit 200.

在一些实施例中，第三开关管Q3及第四开关管Q4可以为金属-氧化层-半导体-场效晶体管(Metal-Oxide-Semiconductor Field-Effect Transistor，MOSFET)，也可以为绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor，IGBT)。其中，当第三开关管Q3及第四开关管Q4均为N型MOSFET时，第三开关管Q3及第四开关管Q4的第一端为漏极，第三开关管Q3及第四开关管Q4的第二端为源极，第三开关管Q3及第四开关管Q4的控制端为栅极。In some embodiments, the third switch tube Q3 and the fourth switch tube Q4 may be metal-oxide-semiconductor field-effect transistors (MOSFET) or insulated gate bipolar transistors (IGBT). When the third switch tube Q3 and the fourth switch tube Q4 are both N-type MOSFETs, the first end of the third switch tube Q3 and the fourth switch tube Q4 is a drain, the second end of the third switch tube Q3 and the fourth switch tube Q4 is a source, and the control end of the third switch tube Q3 and the fourth switch tube Q4 is a gate.

在一些实施例中，第三开关管Q3及第四开关管Q4均为N型MOSFET，且第三开关管Q3及第四开关管Q4分别包括寄生二极管D3及寄生二极管D4。其中，寄生二极管D3的正极连接至第三开关管Q3的源极，寄生二极管D3的负极连接至第三开关管Q3的漏极。寄生二极管D4的正极连接至第四开关管Q4的源极，寄生二极管D4的负极连接至第四开关管Q4的漏极。In some embodiments, the third switch tube Q3 and the fourth switch tube Q4 are both N-type MOSFETs, and the third switch tube Q3 and the fourth switch tube Q4 include a parasitic diode D3 and a parasitic diode D4, respectively. The anode of the parasitic diode D3 is connected to the source of the third switch tube Q3, and the cathode of the parasitic diode D3 is connected to the drain of the third switch tube Q3. The anode of the parasitic diode D4 is connected to the source of the fourth switch tube Q4, and the cathode of the parasitic diode D4 is connected to the drain of the fourth switch tube Q4.

在一些实施例中，供电电路200的限流电路230的具体电路结构可参考图2中的电路结构。在一些实施例中，限流电路230包括第三限流电阻R6。第三限流电阻R6连接于预充开关电路220和供电电路200的输出端OUT之间，用于限制预充开关电路220输出至供电电路200的输出端OUT的电流的大小，以降低因大电流损坏电路的风险,实现对供电电路的输出端的预充。本申请不对限流电路230中的具体电路结构进行限制，限流电路230可以根据具体的需求进行相应调整，以达到限流保护的目的。在其他的实施例中，限流电路230上还是可以设置多个电阻串联而成。In some embodiments, the specific circuit structure of the current limiting circuit 230 of the power supply circuit 200 can refer to the circuit structure in Figure 2. In some embodiments, the current limiting circuit 230 includes a third current limiting resistor R6. The third current limiting resistor R6 is connected between the pre-charging switch circuit 220 and the output terminal OUT of the power supply circuit 200, and is used to limit the magnitude of the current output by the pre-charging switch circuit 220 to the output terminal OUT of the power supply circuit 200, so as to reduce the risk of damaging the circuit due to large current, and realize the pre-charging of the output terminal of the power supply circuit. The present application does not limit the specific circuit structure in the current limiting circuit 230, and the current limiting circuit 230 can be adjusted accordingly according to specific needs to achieve the purpose of current limiting protection. In other embodiments, a plurality of resistors can still be set in series on the current limiting circuit 230.

在另一些实施路中，供电电路200还包括第一保护电路。在一些实施例中，第一保护电路串联在限流电路230所在的支路上，以在该支路过流或者短路时断开该支路，从而降低过流或短路损坏电路的风险。在一些实施例中，第一保护电路包括保险丝F1，如图2所示。In other embodiments, the power supply circuit 200 further includes a first protection circuit. In some embodiments, the first protection circuit is connected in series to the branch where the current limiting circuit 230 is located, so as to disconnect the branch when the branch is overcurrent or short-circuited, thereby reducing the risk of overcurrent or short-circuit damaging the circuit. In some embodiments, the first protection circuit includes a fuse F1, as shown in FIG2 .

在一些实施例中，供电电路200还包括第二保护电路。第二保护电路280电连接于供电电源VCC与主开关电路210之间。第二保护电路用于在供电电源VCC输出的电流过大或短路时断开，从而降低因过流或者短路损坏主开关电路210的风险。在一些实施例中，第二保护电路包括保险丝F2，如图2所示。In some embodiments, the power supply circuit 200 further includes a second protection circuit. The second protection circuit 280 is electrically connected between the power supply VCC and the main switch circuit 210. The second protection circuit is used to disconnect when the current output by the power supply VCC is too large or short-circuited, thereby reducing the risk of damaging the main switch circuit 210 due to overcurrent or short circuit. In some embodiments, the second protection circuit includes a fuse F2, as shown in FIG2 .

可以理解，在其他实施例中，第一保护电路及第二保护电路还可以是其他具有过流保护或短路保护功能的电路，本申请并不对第一保护电路及第二保护电路的具体电路结构进行限制。It can be understood that in other embodiments, the first protection circuit and the second protection circuit can also be other circuits with overcurrent protection or short circuit protection functions, and the present application does not limit the specific circuit structures of the first protection circuit and the second protection circuit.

在一些实施例中，供电电路200还包括防反电路。防反电路的输入端连接预充开关电路220。防反电路的输出端连接辅源电路240(图未示，可参图1)的电源端PW。防反电路用于防止辅源电路240上的电倒灌至供电电源VCC侧或者输出端OUT，从而对供电电源VCC进行损坏或者造成输出端电压的波动。In some embodiments, the power supply circuit 200 further includes an anti-reverse circuit. The input end of the anti-reverse circuit is connected to the pre-charge switch circuit 220. The output end of the anti-reverse circuit is connected to the power supply end PW of the auxiliary source circuit 240 (not shown, see FIG. 1). The anti-reverse circuit is used to prevent the power on the auxiliary source circuit 240 from flowing back to the power supply VCC side or the output end OUT, thereby damaging the power supply VCC or causing fluctuations in the output voltage.

在一些实施例中，防反电路包括二极管D5。二极管D5的正极电路连接至预充开关电路220，二极管D5的负极电路连接至辅源电路240(图未示，可参见图1)的电源端PW。In some embodiments, the anti-reverse circuit includes a diode D5. The positive electrode circuit of the diode D5 is connected to the pre-charge switch circuit 220, and the negative electrode circuit of the diode D5 is connected to the power supply terminal PW of the auxiliary power circuit 240 (not shown, see FIG. 1).

在一些实施例中，供电电路200的驱动电路260的具体电路结构可参考图2中的驱动电路260的电路结构。在一些实施例中，驱动电路260包括驱动开关管Q5、第四限流电阻R7、第五限流电阻R8及驱动分压电阻R9。其中，第四限流电阻R7的第一端电路连接至预充开关电路220的分压电阻R1，第四限流电阻R7第二端电路连接至驱动开关管Q5的第一端。第五限流电阻R8第一端电路连接至驱动开关管Q5的控制端。第五限流电阻R8第二端用于接收预充信号EN1。驱动分压电阻R9的第一端电路连接至开关管Q5的控制端。驱动分压电阻R9的第二端接地。驱动开关管Q5的第二端电路连接至驱动分压电阻R9的第二端。In some embodiments, the specific circuit structure of the driving circuit 260 of the power supply circuit 200 can refer to the circuit structure of the driving circuit 260 in Figure 2. In some embodiments, the driving circuit 260 includes a driving switch tube Q5, a fourth current limiting resistor R7, a fifth current limiting resistor R8 and a driving voltage-dividing resistor R9. Among them, the first end circuit of the fourth current limiting resistor R7 is connected to the voltage-dividing resistor R1 of the pre-charge switch circuit 220, and the second end circuit of the fourth current limiting resistor R7 is connected to the first end of the driving switch tube Q5. The first end circuit of the fifth current limiting resistor R8 is connected to the control end of the driving switch tube Q5. The second end of the fifth current limiting resistor R8 is used to receive the pre-charge signal EN1. The first end circuit of the driving voltage-dividing resistor R9 is connected to the control end of the switch tube Q5. The second end of the driving voltage-dividing resistor R9 is grounded. The second end circuit of the driving switch tube Q5 is connected to the second end of the driving voltage-dividing resistor R9.

在一些实施例中，驱动开关管Q5为三极管。其中，驱动开关管Q5的第一端为集电极，控制端为基极，第三端为发射极。In some embodiments, the driving switch tube Q5 is a triode, wherein the first end of the driving switch tube Q5 is a collector, the control end is a base, and the third end is an emitter.

下面结合图1及图2，并以图2所示供电电路200的电路图为例，说明本申请提供的供电电路200的工作原理：The working principle of the power supply circuit 200 provided in the present application is described below in combination with FIG. 1 and FIG. 2 , and taking the circuit diagram of the power supply circuit 200 shown in FIG. 2 as an example:

当驱动电路260接收到高电平的预充信号EN1时，驱动电路260对预充信号EN1做电平转换，输出对应的驱动信号至预充开关电路220,预充开关电路220接收到该预充信号EN1对应的驱动信号后导通，如此，供电电源VCC通过预充开关电路220及限流电路230输出电压至供电电路200的输出端OUT，以使供电电路200输出端OUT的电压上升。同时，供电电源VCC还通过预充开关电路220输出电压至辅源电路240，以使辅源电路240为控制电路250供电。When the driving circuit 260 receives the high-level pre-charge signal EN1, the driving circuit 260 performs level conversion on the pre-charge signal EN1 and outputs the corresponding driving signal to the pre-charge switch circuit 220. The pre-charge switch circuit 220 is turned on after receiving the driving signal corresponding to the pre-charge signal EN1. In this way, the power supply VCC outputs a voltage to the output terminal OUT of the power supply circuit 200 through the pre-charge switch circuit 220 and the current limiting circuit 230, so that the voltage at the output terminal OUT of the power supply circuit 200 increases. At the same time, the power supply VCC also outputs a voltage to the auxiliary source circuit 240 through the pre-charge switch circuit 220, so that the auxiliary source circuit 240 supplies power to the control circuit 250.

控制电路250接收到辅源电路240输出的电压后，开始工作，并检测供电电路的输出端OUT的输出电压。当控制电路250在检测到供电电源VCC的输出端OUT的电压上升到预充电压阈值时，输出导通信号至主开关电路210。在另一实施例中，控制电路250也可以在预设预充时长内检测到输出端OUT的电压上升到预充电压阈值时，才输出导通信号至主开关电路210，若预设预充时长内没达到预充电压阈值，则输出预警信息。预设预充时长是指根据实际所预设的一个预充时长，如果超过该预设预充时长仍没有将电压提升到预设电压阈值，则表明电路中存在故障，从而需要进行故障预警，同时也可以进一步输出关断信号以断开预充开关电路220。After receiving the voltage output by the auxiliary source circuit 240, the control circuit 250 starts working and detects the output voltage of the output terminal OUT of the power supply circuit. When the control circuit 250 detects that the voltage of the output terminal OUT of the power supply VCC rises to the pre-charge voltage threshold, it outputs a conduction signal to the main switch circuit 210. In another embodiment, the control circuit 250 may also output a conduction signal to the main switch circuit 210 only when it detects that the voltage of the output terminal OUT rises to the pre-charge voltage threshold within the preset pre-charge time. If the pre-charge voltage threshold is not reached within the preset pre-charge time, an early warning message is output. The preset pre-charge time refers to a pre-charge time preset according to actual conditions. If the voltage is still not raised to the preset voltage threshold after exceeding the preset pre-charge time, it indicates that there is a fault in the circuit, and a fault warning is required. At the same time, a shutdown signal can also be further output to disconnect the pre-charge switch circuit 220.

主开关电路210用于在接收到导通信号时导通，以使得供电电源VCC通过供电电路200的输出端OUT供电。The main switch circuit 210 is configured to be turned on when receiving a turn-on signal, so that the power supply VCC is supplied through the output terminal OUT of the power supply circuit 200 .

可以理解，在一些实施例中，主开关电路210导通后，可同时为控制电路250，及连接至供电电路200的输出端OUT的负载供电。It can be understood that in some embodiments, after the main switch circuit 210 is turned on, it can simultaneously supply power to the control circuit 250 and the load connected to the output terminal OUT of the power supply circuit 200 .

传统的供电回路比较复杂，需要设置单个独立的回路，分别为预充回路、辅源回路和主开关回路，回路元器件较多，增加了电路的成本，且多个回路控制，控制逻辑较为复杂，代码不易迭代。以上，本申请提供的供电电路200可用于实现供电电源VCC对外部***及内部控制电路的供电。在一个或多个实施例中，供电电路200还具有更简单的电路结构及更简单的控制逻辑，如此，可进一步降低电路成本，且方便控制代码的迭代。The traditional power supply circuit is relatively complex, and it is necessary to set up a single independent circuit, namely the pre-charging circuit, the auxiliary source circuit and the main switch circuit. There are many circuit components, which increases the cost of the circuit, and the control logic of multiple circuits is relatively complex, and the code is not easy to iterate. As described above, the power supply circuit 200 provided in the present application can be used to realize the power supply VCC to the external system and the internal control circuit. In one or more embodiments, the power supply circuit 200 also has a simpler circuit structure and a simpler control logic, which can further reduce the circuit cost and facilitate the iteration of the control code.

在另一些实施例中，上述控制电路250还用于在达到预设时长内检测输出电压小于参考电压阈值时，控制预充开关电路220保持断开状态。其中，参考电压阈值小于预充电压阈值，预设时长小于预设预充时长。预设时长可以设定为较短的一个时间周期，从而确保在启动过程中能够迅速对异常进行检测并做出响应。In other embodiments, the control circuit 250 is further configured to control the pre-charge switch circuit 220 to remain in an off state when the output voltage is detected to be less than a reference voltage threshold within a preset time period. The reference voltage threshold is less than the pre-charge voltage threshold, and the preset time period is less than the preset pre-charge time period. The preset time period can be set to a shorter time period, thereby ensuring that abnormalities can be quickly detected and responded to during the startup process.

在另一些实施例中，当控制电路250在预设时长检测输出电压大于或者等于参考电压阈值时，控制预充开关电路220保持导通状态，并进一步判断在达到预充时长时输出电压是否能够提升到预充电压阈值。这个过程，保持预充开关电路220处于导通状态。In other embodiments, when the control circuit 250 detects that the output voltage is greater than or equal to the reference voltage threshold value during the preset time, the pre-charge switch circuit 220 is controlled to remain in the on state, and further determines whether the output voltage can be increased to the pre-charge voltage threshold value when the pre-charge time is reached. In this process, the pre-charge switch circuit 220 is kept in the on state.

可以理解，本申请并不对供电电路200中的具体电路结构进行限制。例如，请参考图3，图3为本申请另一实施例提供的供电电路200的部分电路图。在其他实施例中，亦可根据图3，对图2中的部分电路进行相应的电路结构的替换。It is understood that the present application does not limit the specific circuit structure in the power supply circuit 200. For example, please refer to FIG. 3, which is a partial circuit diagram of the power supply circuit 200 provided in another embodiment of the present application. In other embodiments, according to FIG. 3, the corresponding circuit structure of part of the circuit in FIG. 2 can also be replaced.

例如，在一些实施例中，供电电路200的预充开关电路220的具体电路结构可参考图3中的预充开关电路220。在一些实施例中，预充开关电路220包括第五开关管Q6、第三偏置电阻R10和第一滤波电容C1。第五开关管Q6的第一端用于连接供电电源。第五开关管Q6的第二端与限流电路230连接。第五开关管Q6的控制端用于接收预充信号，以在接收到预充信号时导通。第三偏置电阻R10和第一滤波电容C1并联后，连接于第五开关管Q6的第一端和控制端之间。For example, in some embodiments, the specific circuit structure of the pre-charge switch circuit 220 of the power supply circuit 200 can refer to the pre-charge switch circuit 220 in Figure 3. In some embodiments, the pre-charge switch circuit 220 includes a fifth switch tube Q6, a third bias resistor R10 and a first filter capacitor C1. The first end of the fifth switch tube Q6 is used to connect to the power supply. The second end of the fifth switch tube Q6 is connected to the current limiting circuit 230. The control end of the fifth switch tube Q6 is used to receive a pre-charge signal to turn on when the pre-charge signal is received. After the third bias resistor R10 and the first filter capacitor C1 are connected in parallel, they are connected between the first end and the control end of the fifth switch tube Q6.

其中，第一滤波电容C1和第三偏置电阻R10构成RC滤波电路，用于对供电电源VCC输入至预充开关电路220的电信号进行滤波处理，以防止过大的电压冲击第五开关管Q6，对第五开关管Q6造成损害。The first filter capacitor C1 and the third bias resistor R10 form an RC filter circuit for filtering the electrical signal input from the power supply VCC to the pre-charge switch circuit 220 to prevent excessive voltage from impacting the fifth switch tube Q6 and causing damage to the fifth switch tube Q6.

在一些实施例中，当第五开关管Q6为P型MOSFET时，第五开关管Q6的第一端为源极，第二端为漏极，控制端为栅极。在一些实施例中当第五开关管Q6为P型MOSFET时，第五开关管Q6还包括寄生二极管D6，寄生二极管D6的正极与P型MOSFET的漏极连接，寄生二极管D6的负极与P型MOSFET的源极连接。In some embodiments, when the fifth switch tube Q6 is a P-type MOSFET, the first end of the fifth switch tube Q6 is a source, the second end is a drain, and the control end is a gate. In some embodiments, when the fifth switch tube Q6 is a P-type MOSFET, the fifth switch tube Q6 further includes a parasitic diode D6, the anode of the parasitic diode D6 is connected to the drain of the P-type MOSFET, and the cathode of the parasitic diode D6 is connected to the source of the P-type MOSFET.

在一些实施例中，预充开关电路220还包括稳压二极管D7。稳压二极管D7的负极与第五开关管Q6的第一端连接。稳压二极管D7的正极与第五开关管Q6的控制端连接。稳压二极管D7用于稳定第五开关管Q6的第一端和控制端之间的电压差。当供电电源输入的电压大于等于稳压二极管D7的预设电压时，稳压二极管D7被击穿，第五开关管Q6上不会有电流流过，即不会损坏第五开关管Q6。In some embodiments, the pre-charge switch circuit 220 further includes a voltage regulator diode D7. The cathode of the voltage regulator diode D7 is connected to the first end of the fifth switch tube Q6. The anode of the voltage regulator diode D7 is connected to the control end of the fifth switch tube Q6. The voltage regulator diode D7 is used to stabilize the voltage difference between the first end and the control end of the fifth switch tube Q6. When the voltage input by the power supply is greater than or equal to the preset voltage of the voltage regulator diode D7, the voltage regulator diode D7 is broken down, and no current will flow through the fifth switch tube Q6, that is, the fifth switch tube Q6 will not be damaged.

在一些实施例中，请参图3，图3所示的供电电路200，当供电电路200还包括驱动电路260。其中，驱动电路260包括驱动开关管Q5、第四限流电阻R7、第五限流电阻R8及驱动分压电阻R9，且驱动开关管Q5、第四限流电阻R7、第五限流电阻R8及驱动分压电阻R9的连接方式参见上述实施例所述，当预充电路220包括稳压二极管D7时，驱动电路260中的第四限流电阻R7的第一端与稳压二极管D7的正极连接，如下将结合驱动电路260说明稳压二极管D7的作用。In some embodiments, please refer to FIG3 , the power supply circuit 200 shown in FIG3 , when the power supply circuit 200 further includes a driving circuit 260. Among them, the driving circuit 260 includes a driving switch tube Q5, a fourth current limiting resistor R7, a fifth current limiting resistor R8 and a driving voltage dividing resistor R9, and the connection method of the driving switch tube Q5, the fourth current limiting resistor R7, the fifth current limiting resistor R8 and the driving voltage dividing resistor R9 is as described in the above embodiment, when the pre-charging circuit 220 includes a voltage-stabilizing diode D7, the first end of the fourth current-limiting resistor R7 in the driving circuit 260 is connected to the positive electrode of the voltage-stabilizing diode D7, and the role of the voltage-stabilizing diode D7 will be described in conjunction with the driving circuit 260 as follows.

具体地，当驱动开关管Q5导通时，驱动电路260中的第四限流电阻R7接地。由于驱动开关管Q5为PMOS管，且驱动开关管Q5的控制端通过稳压二极管D7连接至驱动电路26的第四限流电阻R7，此时，驱动开关管Q5导通，稳压二极管D7的正极相当于接地。如此，当供电电源VCC的电压大于稳压二极管D6的稳压值时，则稳压二极管D7被击穿，进而保护第五开关管Q6，降低第五开关管Q6的引脚被供电电源VCC的瞬时电压损坏的风险。Specifically, when the driving switch tube Q5 is turned on, the fourth current limiting resistor R7 in the driving circuit 260 is grounded. Since the driving switch tube Q5 is a PMOS tube, and the control end of the driving switch tube Q5 is connected to the fourth current limiting resistor R7 of the driving circuit 26 through the voltage regulator diode D7, at this time, the driving switch tube Q5 is turned on, and the positive electrode of the voltage regulator diode D7 is equivalent to grounding. In this way, when the voltage of the power supply VCC is greater than the voltage regulation value of the voltage regulator diode D6, the voltage regulator diode D7 is broken down, thereby protecting the fifth switch tube Q6, and reducing the risk of the pin of the fifth switch tube Q6 being damaged by the instantaneous voltage of the power supply VCC.

在一些实施例中，预充开关电路220包括至少一第二滤波电容，用以吸收供电电源VCC输出的尖峰电压。其中，当预充开关电路220仅包括一个第二滤波电容，例如滤波电容C2时，滤波电容C2的一端与第五开关管Q6的第一端连接。滤波电容C2的另一端与第五开关管Q6的第二端连接。当预充开关电路220包括若干第二滤波电容(例如滤波电容C2及滤波电容C3)时，若干第二滤波电容串联连接(即滤波电容C2与滤波电容C3串联连接)。且串联连接后的若干第二滤波电容的一端与第五开关管Q6的第一端连接。串联连接后的若干第二滤波电容的另一端与第五开关管Q6的第二端连接。In some embodiments, the pre-charge switch circuit 220 includes at least one second filter capacitor for absorbing the peak voltage output by the power supply VCC. Wherein, when the pre-charge switch circuit 220 includes only one second filter capacitor, such as filter capacitor C2, one end of filter capacitor C2 is connected to the first end of the fifth switch tube Q6. The other end of filter capacitor C2 is connected to the second end of the fifth switch tube Q6. When the pre-charge switch circuit 220 includes a plurality of second filter capacitors (such as filter capacitor C2 and filter capacitor C3), the plurality of second filter capacitors are connected in series (that is, filter capacitor C2 is connected in series with filter capacitor C3). And one end of the plurality of second filter capacitors connected in series is connected to the first end of the fifth switch tube Q6. The other end of the plurality of second filter capacitors connected in series is connected to the second end of the fifth switch tube Q6.

在一些实施例中，供电电路200的限流电路230的具体电路结构可参考图3中的限流电路230的电路结构。在一些实施例中，限流电路230包括若干并联连接的限流电阻，例如并联连接的限流电阻R14、限流电阻R15及限流电阻R16。可以理解，本申请并不对限流电路230中并联的限流电阻的数量进行限制，本领域技术人员可根据实际电路需要进行调整。请继续参阅图3，在一些实施例中，限流电路230与供电电路200的输出端OUT之间亦设置有防反电路，防反电路可以包括如图3所示的防反二极管D8，防反二极管D8的正极与限流电路230的第二端连接，防反二极管D8的负极与供电电路200的输出端out连接。如此，亦可防止与供电电路200的输出端OUT连接的负载在通电瞬间因电压过大损坏供电电路200。In some embodiments, the specific circuit structure of the current limiting circuit 230 of the power supply circuit 200 can refer to the circuit structure of the current limiting circuit 230 in FIG3. In some embodiments, the current limiting circuit 230 includes a plurality of current limiting resistors connected in parallel, such as current limiting resistors R14, current limiting resistors R15 and current limiting resistors R16 connected in parallel. It can be understood that the present application does not limit the number of current limiting resistors connected in parallel in the current limiting circuit 230, and those skilled in the art can adjust it according to the actual circuit needs. Please continue to refer to FIG3. In some embodiments, an anti-reverse circuit is also provided between the current limiting circuit 230 and the output terminal OUT of the power supply circuit 200. The anti-reverse circuit may include an anti-reverse diode D8 as shown in FIG3, the positive pole of the anti-reverse diode D8 is connected to the second end of the current limiting circuit 230, and the negative pole of the anti-reverse diode D8 is connected to the output terminal out of the power supply circuit 200. In this way, the load connected to the output terminal OUT of the power supply circuit 200 can also be prevented from damaging the power supply circuit 200 due to excessive voltage at the moment of power-on.

在一些实施例中，防反电路与辅源电路240(图未示，可参见图1)的电源端PW之间还连接有第三保护电路。第三保护电路的电路结构可与第一保护电路的电路结构相同，即第三保护电路可以包括保险丝F3，如图3所示。如此，可降低过流或短路造成的损坏电路的风险。In some embodiments, a third protection circuit is further connected between the anti-reverse circuit and the power supply terminal PW of the auxiliary source circuit 240 (not shown, see FIG. 1 ). The circuit structure of the third protection circuit may be the same as that of the first protection circuit, that is, the third protection circuit may include a fuse F3, as shown in FIG. 3 . In this way, the risk of damaging the circuit due to overcurrent or short circuit may be reduced.

可以理解，图3所示的供电电路200还包括主开关电路。在一些实施例中，图3所示的供电电路200中的主开关电路的电路结构可参考主开关电路210(请参图2)，在此不再赘述。It is understood that the power supply circuit 200 shown in Figure 3 also includes a main switch circuit. In some embodiments, the circuit structure of the main switch circuit in the power supply circuit 200 shown in Figure 3 can refer to the main switch circuit 210 (see Figure 2), which will not be repeated here.

请继续参阅图4，本申请一实施例还提供一种储能设备。储能设备包括电路连接的电池模块300及供电电路200。其中，供电电路200的输出端OUT连接至负载100，以将储能电池模块300的电能传输至负载100。可以理解，供电电路200的输出端OUT也可以连接至储能设备内的其他工作模块，以向其他工作模块提供工作所需要的电压。Please continue to refer to FIG. 4 . An embodiment of the present application further provides an energy storage device. The energy storage device includes a battery module 300 and a power supply circuit 200 connected in a circuit. The output terminal OUT of the power supply circuit 200 is connected to the load 100 to transmit the electric energy of the energy storage battery module 300 to the load 100. It can be understood that the output terminal OUT of the power supply circuit 200 can also be connected to other working modules in the energy storage device to provide the voltage required for the other working modules to work.

可以理解，本申请提及的储能设备包括但不限于一次电池、二次电池、燃料电池、太阳能电池等任何可用于储存能量的装置。负载100可以为电动摩托、电动单车、电动汽车、手机、平板电脑、个数数字助理、个人电脑，或者任何其他适合的用电设备，或者负载100也可以是用电设备中的电机单元、显示单元、无线保真(Wireless Fidelity，WiFi)单元、蓝牙单元及扬声器等耗电器件中的至少一种，在此不再一一赘述。It is understood that the energy storage devices mentioned in this application include but are not limited to primary batteries, secondary batteries, fuel cells, solar cells, and any other device that can be used to store energy. The load 100 can be an electric motorcycle, an electric bicycle, an electric car, a mobile phone, a tablet computer, a digital assistant, a personal computer, or any other suitable electrical device, or the load 100 can also be at least one of the power-consuming devices such as a motor unit, a display unit, a wireless fidelity (WiFi) unit, a Bluetooth unit, and a speaker in the electrical device, which will not be described one by one here.

请继续参阅图5，本申请一实施例还提供一种供电电路的控制方法，可用于控制前述任一实施例中的供电电路。供电电路的具体结构可以参见前面实施例中的结构。Please continue to refer to Figure 5, an embodiment of the present application further provides a control method for a power supply circuit, which can be used to control the power supply circuit in any of the above embodiments. The specific structure of the power supply circuit can refer to the structure in the above embodiments.

该控制方法可用于控制上述实施例所提及的供电电路200。具体的，该控制方法应用于供电电路200中的控制电路250。The control method can be used to control the power supply circuit 200 mentioned in the above embodiment. Specifically, the control method is applied to the control circuit 250 in the power supply circuit 200.

在一些实施例中，该控制方法包括：In some embodiments, the control method includes:

步骤S110：获取供电电路输出端的输出电压。Step S110: obtaining the output voltage of the output end of the power supply circuit.

供电电路启动时，即预充开关电路220导通，且预充开关电路220导通后，供电电源通过预充开关电路220及限流电路230输出电压至供电电路的输出端，供电电源还通过预充开关电路210输出电压至辅源电路，以启动控制电路250。因此控制电路250可以直接通过采样端对供电电路输出端的输出电压进行采样或者通过电压采样电路对该输出电压进行采样。When the power supply circuit is started, that is, the pre-charge switch circuit 220 is turned on, and after the pre-charge switch circuit 220 is turned on, the power supply outputs a voltage to the output end of the power supply circuit through the pre-charge switch circuit 220 and the current limiting circuit 230, and the power supply also outputs a voltage to the auxiliary source circuit through the pre-charge switch circuit 210 to start the control circuit 250. Therefore, the control circuit 250 can directly sample the output voltage of the output end of the power supply circuit through the sampling end or sample the output voltage through the voltage sampling circuit.

步骤S120：在输出电压上升到预充电压阈值时，输出导通信号至主开关电路。导通信号用于导通主开关电路210，以使得供电电源通过供电电路的输出端供电。Step S120: When the output voltage rises to the pre-charge voltage threshold, output a conduction signal to the main switch circuit. The conduction signal is used to turn on the main switch circuit 210 so that the power supply can supply power through the output end of the power supply circuit.

在输出电压上升到预充电压阈值时，可以确认当前已经完成了预充，从而输出导通信号至主开关单元，使得主开关单元导通，从而使得整个供电电路进入正常供电状态。也即本实施例中，只需要先开启预充开关电路然后在完成预充后打开主开关电路即可，不需要更复杂的控制驱动逻辑，简单易实现。When the output voltage rises to the pre-charge voltage threshold, it can be confirmed that the pre-charge has been completed, so that a conduction signal is output to the main switch unit, so that the main switch unit is turned on, so that the entire power supply circuit enters a normal power supply state. That is, in this embodiment, it is only necessary to turn on the pre-charge switch circuit first and then turn on the main switch circuit after the pre-charge is completed. There is no need for more complex control drive logic, which is simple and easy to implement.

可以理解，并执行上述控制方法中提及的步骤。The steps mentioned in the above control method can be understood and executed.

上述控制方法，还包括，在预设预充时长内检测到输出电压上升到预充电压阈值时，才输出导通信号至主开关电路210。若预设预充时长内没达到预充电压阈值，则输出预警信息。预设预充时长是指根据实际所预设的一个预充时长，如果超过该预设预充时长仍没有将电压提升到预设电压阈值，则表明电路中存在故障，从而需要进行故障预警，同时也可以进一步输出关断信号以断开预充开关电路220。The above control method also includes outputting a conduction signal to the main switch circuit 210 only when the output voltage is detected to rise to the pre-charge voltage threshold within the preset pre-charge time. If the pre-charge voltage threshold is not reached within the preset pre-charge time, a warning message is output. The preset pre-charge time refers to a pre-charge time preset according to actual conditions. If the voltage is still not raised to the preset voltage threshold after exceeding the preset pre-charge time, it indicates that there is a fault in the circuit, so a fault warning is required, and a shutdown signal can also be further output to disconnect the pre-charge switch circuit 220.

上述方法还包括：在达到预设时长检测输出电压小于参考电压阈值时，控制预充开关电路220保持断开状态。其中，参考电压阈值小于预充电压阈值，预设时长小于预设预充时长。预设时长可以设定为较短的一个时间周期，从而确保在启动过程中能够迅速对异常进行检测并做出响应。通常在预充过程中，供电电路的输出端的输出电压会呈现出一个缓慢上升的过程，如果在某个时间段一直检测不到这个上升的过程，也即在预设时长检测输出电压小于参考电压阈值，则可以确认输出电压存在异常。通过在预充完成之前进行异常判断，能够及时发现故障，确保电路的安全性和稳定性。The above method also includes: when the output voltage is detected to be less than the reference voltage threshold after a preset time, controlling the pre-charge switch circuit 220 to remain in the disconnected state. Among them, the reference voltage threshold is less than the pre-charge voltage threshold, and the preset time is less than the preset pre-charge time. The preset time can be set to a shorter time period to ensure that the abnormality can be quickly detected and responded to during the startup process. Usually during the pre-charge process, the output voltage at the output end of the power supply circuit will show a slowly rising process. If this rising process cannot be detected for a certain period of time, that is, the output voltage is detected to be less than the reference voltage threshold after the preset time, it can be confirmed that the output voltage is abnormal. By making an abnormality judgment before the pre-charge is completed, the fault can be discovered in time to ensure the safety and stability of the circuit.

在一些实施例中，提供了一种检测装置，该检测装置包括：检测模块和控制模块，检测装置被配置为在启动后，检测供电电路输出端的输出电压。控制模块被配置为在检测到输出电压上升到预充电压阈值时，输出导通信号至主开关电路。其中，导通信号用于导通主开关电路，以使得供电电源通过供电电路的输出端供电。In some embodiments, a detection device is provided, the detection device comprising: a detection module and a control module, the detection device is configured to detect the output voltage of the output end of the power supply circuit after startup. The control module is configured to output a conduction signal to the main switch circuit when the output voltage is detected to rise to the pre-charge voltage threshold. The conduction signal is used to turn on the main switch circuit so that the power supply is supplied through the output end of the power supply circuit.

另外，本技术领域的普通技术人员应当认识到，以上的实施例仅是用来说明本申请，而并非用作为对本申请的限定，只要在本申请的实质精神范围之内，对以上实施例所作的适当改变和变化都落在本申请公开的范围之内。In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

一种供电电路，所述供电电路包括主开关电路、预充开关电路、限流电路、辅源电路及控制电路；所述主开关电路的输入端和所述预充开关电路的输入端均与供电电源的输出端连接，所述主开关电路的输出端为所述供电电路的输出端；所述预充开关电路的输出端与所述限流电路的输入端连接，所述限流电路的输出端连接所述主开关电路的输出端；所述辅源电路的电源端连接于所述预充开关电路和所述限流电路之间；所述辅源电路的输出端与所述控制电路的输入端连接；所述控制电路的输出端与所述供电电路的输出端连接；A power supply circuit, comprising a main switch circuit, a pre-charge switch circuit, a current limiting circuit, an auxiliary source circuit and a control circuit; the input end of the main switch circuit and the input end of the pre-charge switch circuit are both connected to the output end of a power supply, and the output end of the main switch circuit is the output end of the power supply circuit; the output end of the pre-charge switch circuit is connected to the input end of the current limiting circuit, and the output end of the current limiting circuit is connected to the output end of the main switch circuit; the power supply end of the auxiliary source circuit is connected between the pre-charge switch circuit and the current limiting circuit; the output end of the auxiliary source circuit is connected to the input end of the control circuit; the output end of the control circuit is connected to the output end of the power supply circuit;

所述预充开关电路被配置为在接收到预充信号时导通；所述辅源电路被配置为在所述电源端的输入电压大于使能电压时启动，并在启动后输出启动电压至所述控制电路以启动所述控制电路；所述控制电路被配置为在启动后，检测所述供电电路的输出电压，并在检测到所述输出电压上升到预充电压阈值时，输出导通信号至所述主开关电路；所述主开关电路被配置为在接收到所述导通信号时导通，以使得所述供电电源通过所述供电电路的输出端供电。The pre-charge switch circuit is configured to be turned on when a pre-charge signal is received; the auxiliary source circuit is configured to start when the input voltage at the power supply end is greater than the enable voltage, and output a start-up voltage to the control circuit after starting to start the control circuit; the control circuit is configured to detect the output voltage of the power supply circuit after starting, and output a turn-on signal to the main switch circuit when it is detected that the output voltage rises to the pre-charge voltage threshold; the main switch circuit is configured to be turned on when the turn-on signal is received, so that the power supply supplies power through the output end of the power supply circuit.
如权利要求1所述的供电电路，其特征在于，所述供电电路还包括驱动电路；The power supply circuit according to claim 1, characterized in that the power supply circuit further comprises a driving circuit;

所述驱动电路与所述预充开关电路连接，所述驱动电路被配置为接收所述预充信号，并对所述预充信号进行电平转换后输出至所述预充开关电路，以驱动所述预充开关电路导通。The driving circuit is connected to the pre-charge switch circuit, and is configured to receive the pre-charge signal, and output the pre-charge signal to the pre-charge switch circuit after performing level conversion, so as to drive the pre-charge switch circuit to conduct.
如权利要求1所述的供电电路，其特征在于，所述预充开关电路包括第一开关管、第二开关管以及分压电阻；The power supply circuit according to claim 1, characterized in that the pre-charge switch circuit comprises a first switch tube, a second switch tube and a voltage dividing resistor;

所述第一开关管的第一端与所述供电电源连接，所述第一开关管的第二端与所述第二开关管的第二端连接，所述第二开关管的第一端与所述限流电路连接，所述分压电阻连接于所述第一开关管的第一端和控制端之间；所述第一开关管的控制端与所述第二开关管的控制端连接，以接收所述预充信号，并在接收到所述预充信号时导通。The first end of the first switch tube is connected to the power supply, the second end of the first switch tube is connected to the second end of the second switch tube, the first end of the second switch tube is connected to the current limiting circuit, and the voltage divider resistor is connected between the first end and the control end of the first switch tube; the control end of the first switch tube is connected to the control end of the second switch tube to receive the pre-charge signal and turn on when the pre-charge signal is received.
如权利要求1任一项所述的供电电路，其特征在于，所述主开关电路包括第三开关管、第四开关管、第一偏置电阻、第一限流电阻、第二偏置电阻和第二限流电阻；The power supply circuit according to any one of claims 1, characterized in that the main switch circuit comprises a third switch tube, a fourth switch tube, a first bias resistor, a first current limiting resistor, a second bias resistor and a second current limiting resistor;

所述第三开关管的第一端和所述第四开关管的第一端连接，所述第三开关管的第二端用于连接所述供电电源，所述第三开关管的控制端连接所述第一限流电阻的第一端，所述第一限流电阻的第二端连接所述控制电路，所述第一偏置电阻的第一端连接所述第一限流电阻的第二端，所述第一偏置电阻的第二端连接所述第三开关管的第二端；The first end of the third switch tube is connected to the first end of the fourth switch tube, the second end of the third switch tube is used to connect to the power supply, the control end of the third switch tube is connected to the first end of the first current limiting resistor, the second end of the first current limiting resistor is connected to the control circuit, the first end of the first bias resistor is connected to the second end of the first current limiting resistor, and the second end of the first bias resistor is connected to the second end of the third switch tube;

所述第四开关管的第二端与所述供电电路的输出端连接，所述第四开关管的控制端连接所述第二限流电阻的第一端，所述第二限流电阻的第二端连接所述控制电路，所述第二偏置电阻的第一端连接所述第二限流电阻的第二端，所述第二偏置电阻的第二端与所述第四开关管的第二端连接。The second end of the fourth switch tube is connected to the output end of the power supply circuit, the control end of the fourth switch tube is connected to the first end of the second current limiting resistor, the second end of the second current limiting resistor is connected to the control circuit, the first end of the second bias resistor is connected to the second end of the second current limiting resistor, and the second end of the second bias resistor is connected to the second end of the fourth switch tube.
如权利要求1所述的供电电路，其特征在于，所述供电电路还包括防反电路，所述防反电路的输入端连接所述预充开关电路，所述防反电路的输出端连接所述辅源电路的电源端。The power supply circuit as described in claim 1 is characterized in that the power supply circuit also includes an anti-reverse circuit, the input end of the anti-reverse circuit is connected to the pre-charge switch circuit, and the output end of the anti-reverse circuit is connected to the power supply end of the auxiliary source circuit.
如权利要求1所述的供电电路，其特征在于，所述供电电路还包括保护电路；所述保护电路串联在所述限流电路所在的支路上，以在所述支路过流或者短路时断开所述支路。The power supply circuit as described in claim 1 is characterized in that the power supply circuit also includes a protection circuit; the protection circuit is connected in series to the branch where the current limiting circuit is located to disconnect the branch when the branch is overcurrent or short-circuited.
如权利要求1所述的供电电路，其特征在于，所述控制电路还被配置为在达到预设时长时，若检测到所述输出电压小于参考电压阈值，则控制预充开关电路处于断开状态；所述参考电压阈值小于所述预充电压阈值。The power supply circuit as described in claim 1 is characterized in that the control circuit is also configured to control the pre-charge switch circuit to be in a disconnected state when the preset time is reached and if it is detected that the output voltage is less than a reference voltage threshold; the reference voltage threshold is less than the pre-charge voltage threshold.
根据权利要求1所述的供电电路，其特征在于，所述控制电路还被配置为在控制所述主开关电路导通时，维持所述预充开关电路处于导通状态。The power supply circuit according to claim 1 is characterized in that the control circuit is also configured to maintain the pre-charge switch circuit in a conductive state when controlling the main switch circuit to be conductive.
如权利要求1所述的供电电路，其特征在于，所述预充开关电路包括第五开关管、第三偏置电阻和第一滤波电容，所述第五开关管的第一端被配置为连接所述供电电源，所述第五开关管的第二端与所述限流电路连接，所述第五开关管的控制端被配置为接收所述预充信号，以在接收到所述预充信号时导通；所述第三偏置电阻和所述第一滤波电容并联后，连接于所述第五开关管的第一端和控制端之间。The power supply circuit as described in claim 1 is characterized in that the pre-charge switch circuit includes a fifth switch tube, a third bias resistor and a first filter capacitor, the first end of the fifth switch tube is configured to be connected to the power supply, the second end of the fifth switch tube is connected to the current limiting circuit, and the control end of the fifth switch tube is configured to receive the pre-charge signal so as to be turned on when the pre-charge signal is received; the third bias resistor and the first filter capacitor are connected in parallel and connected between the first end and the control end of the fifth switch tube.
一种供电电路的控制方法，所述供电电路包括主开关电路、预充开关电路、限流电路、辅源电路及控制电路；所述主开关电路的输入端和所述预充开关电路的输入端均与供电电源的输出端连接，所述主开关电路的输出端为所述供电电路的输出端；所述预充开关电路的输出端与所述限流电路的输入端连接，所述限流电路的输出端连接所述主开关电路的输出端；所述辅源电路的电源端连接于所述预充开关电路和所述限流电路之间；所述辅源电路的输出端与所述控制电路的输出端连接；所述控制电路的输出端与所述供电电路的输出端连接；所述预充开关电路被配置为在接收到预充信号时导通；所述辅源电路用被配置为在所述电源端的输入电压大于使能电压时启动，并在启动后输出启动电压至所述控制电路以启动所述控制电路，所述控制电路被配置为在启动后执行所述控制方法；所述控制方法包括：A control method for a power supply circuit, the power supply circuit comprises a main switch circuit, a pre-charge switch circuit, a current limiting circuit, an auxiliary source circuit and a control circuit; the input end of the main switch circuit and the input end of the pre-charge switch circuit are both connected to the output end of the power supply, and the output end of the main switch circuit is the output end of the power supply circuit; the output end of the pre-charge switch circuit is connected to the input end of the current limiting circuit, and the output end of the current limiting circuit is connected to the output end of the main switch circuit; the power supply end of the auxiliary source circuit is connected between the pre-charge switch circuit and the current limiting circuit; the output end of the auxiliary source circuit is connected to the output end of the control circuit; the output end of the control circuit is connected to the output end of the power supply circuit; the pre-charge switch circuit is configured to be turned on when a pre-charge signal is received; the auxiliary source circuit is configured to start when the input voltage of the power supply end is greater than the enable voltage, and after starting, outputs a start voltage to the control circuit to start the control circuit, and the control circuit is configured to execute the control method after starting; the control method comprises:

获取所述供电电路输出端的输出电压；Obtaining an output voltage at an output end of the power supply circuit;

在所述输出电压上升到预充电压阈值时，输出导通信号至所述主开关电路；所述导通信号被配置为导通所述主开关电路，以使得所述供电电源通过所述供电电路的输出端供电。When the output voltage rises to the pre-charge voltage threshold, a conduction signal is output to the main switch circuit; the conduction signal is configured to turn on the main switch circuit so that the power supply is supplied through the output end of the power supply circuit.
一种储能设备，所述储能设备包括电池模块和如权利要求1-8任一项所述的供电电路。An energy storage device, comprising a battery module and a power supply circuit as claimed in any one of claims 1 to 8.