WO2022252364A1 - 冷启动电路和挖掘机 - Google Patents
冷启动电路和挖掘机 Download PDFInfo
- Publication number
- WO2022252364A1 WO2022252364A1 PCT/CN2021/107213 CN2021107213W WO2022252364A1 WO 2022252364 A1 WO2022252364 A1 WO 2022252364A1 CN 2021107213 W CN2021107213 W CN 2021107213W WO 2022252364 A1 WO2022252364 A1 WO 2022252364A1
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- WIPO (PCT)
- Prior art keywords
- capacitor
- cold start
- resistor
- power supply
- engine
- Prior art date
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- 230000007423 decrease Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 59
- 239000007858 starting material Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
Definitions
- the present application relates to the technical field of electronic circuits, in particular to a cold start circuit and an excavator.
- a heater may be used to heat the engine oil in the fuel tank before the engine is started, so as to facilitate the engine start. This requires adding a heater to the starting system. However, doing so will result in higher input costs.
- the application provides a cold start circuit and an excavator, which are used to solve the defect of using a heater to heat the engine oil in the fuel tank in the prior art with high input costs, and achieve the effect of reducing the risk of engine start failure through lower costs .
- the present application provides a cold start circuit, including: a power supply, a drive circuit, a motor, and a first discharge module; the power supply is connected to the drive circuit, the drive circuit is connected to the motor, and the first discharge module is connected in parallel to the The two ends of the power supply; the drive circuit is used to drive the engine to rotate when receiving the start signal; the first discharge module is used to discharge the charge when the level voltage of the cold start circuit decreases.
- the cold start circuit provided by the present application can release charges when the level voltage of the cold start circuit decreases through the first discharge module connected in parallel at both ends of the power supply. In this way, at the moment of starting the engine, if the level voltage is pulled down, the first discharge module can make up for the voltage drop by releasing the charge, thereby reducing the risk of failure to start the engine.
- the first discharge module includes a first capacitor and a first resistor, the first capacitor and the first resistor are connected in series, and one end of the first resistor is connected to the positive pole of the power supply , the other end of which is connected to the first capacitor, one end of the first capacitor is connected to the first resistor, and the other end is connected to the negative pole of the power supply.
- the first discharge module includes the first capacitor, the charge can be released through the first capacitor, thereby reducing the risk of engine startup failure. Since the first discharge module also includes the first resistor, the When the first capacitor is discharged, the instantaneous voltage can be prevented from being too large, so as to ensure the stability of the circuit.
- the drive circuit includes a relay, a starter motor, an engine control component, and a start switch; the power supply is respectively connected to the relay, the b terminal of the starter motor, and the engine control component, so The engine control component is connected to the relay, the relay is connected to the s end of the starter motor, the starter motor is connected to the engine, and the start switch is connected to the engine control component.
- the start switch is used to receive a start signal, and transmit the start signal to the engine control assembly;
- the engine control assembly is used to receive the start signal , to trigger the normally open contact of the relay to close;
- the relay is used to close the normally open contact when receiving the control signal of the engine control component;
- the starter motor is used to close the normally open contact of the relay When the open contact is closed, the engine is driven to run.
- the drive circuit further includes a display screen controller, one end of the display screen controller is connected to the start switch and the power supply, and the other end is connected to the engine control assembly, and the display screen The controller is used for outputting a signal to the engine control assembly under the condition of receiving the starting signal.
- the cold start circuit provided by the present application includes a display controller, it can output a signal to the engine control component through the display controller, so that the user can intuitively see the starting reaction of the engine.
- the drive circuit further includes a second discharge module; the second discharge module is connected in parallel to both ends of the display controller; the second discharge module is used for The charge is released when the level voltage of the circuit is lowered.
- the second discharge module includes a second capacitor and a second resistor, the second capacitor and the second resistor are connected in series, and one end of the second resistor is connected to the display screen control one end of the second resistor, the other end of the second resistor is connected to the second capacitor, one end of the second capacitor is connected to the second resistor, and the other end of the second capacitor is connected to the other end of the display screen controller one end.
- the second discharge module includes the second capacitor
- the charge can be released through the second capacitor, thereby avoiding the display screen being turned off due to low voltage at the moment of startup, because the second discharge module also includes the second capacitor.
- Two resistors therefore, when the second capacitor is discharged, it can prevent the instantaneous voltage from being too large, thereby ensuring the stability of the circuit.
- the first capacitor and the second capacitor are farad capacitors.
- the first capacitor and the second capacitor are farad capacitors, the energy storage process of the first capacitor and the second capacitor is reversible, and the first capacitor and the second capacitor can be charged when the voltage rises , discharge when the voltage drops, and then maintain the stability of the circuit.
- the drive circuit further includes a power management module; the power management module is connected between the power supply and the engine control component; the power management module is used for distributing charges to the the starter switch, the display screen controller, the engine control assembly, and the relay.
- the drive circuit since the drive circuit includes a power management module, charges can be allocated to different branches according to device requirements.
- the present application also provides an excavator, including any one of the above-mentioned cold start circuits.
- Fig. 1 is one of the structural schematic diagrams of the cold start circuit provided by the present application.
- Fig. 2 is the second structural diagram of the cold start circuit provided by the present application.
- Fig. 3 is the third schematic diagram of the structure of the cold start circuit provided by the present application.
- Fig. 4 is the fourth schematic diagram of the structure of the cold start circuit provided by the present application.
- Fig. 5 is the fifth schematic diagram of the structure of the cold start circuit provided by the present application.
- Fig. 6 is the sixth schematic diagram of the structure of the cold start circuit provided by the present application.
- words such as “first” and “second” are used to distinguish the same or similar items with basically the same functions and functions. Personnel can understand that words such as “first” and “second” are not limiting the quantity and execution order.
- the present application provides a cold start circuit, including: a power supply, a drive circuit, a motor, and a first discharge module.
- the positive pole of the power supply is connected to the drive circuit, and the negative pole is grounded; the power supply can be a storage battery.
- the drive circuit is connected to the engine; the first discharge module is connected in parallel to both ends of the power supply.
- the user can trigger the start signal with one key, and when the drive circuit receives the start signal, the drive circuit can drive the engine to rotate; since the level voltage of the circuit will be pulled down at the moment the circuit starts, which will cause the engine to fail to start, so , in order to avoid this situation, when the level voltage of the cold start circuit decreases, the first discharge module can supplement the voltage drop of the circuit by releasing the charge, and the power of the engine will not be affected due to the supplement of the circuit voltage drop.
- the above-mentioned first discharge module may include a first capacitor C1 and a first resistor R1, the first capacitor C1 and the first resistor R1 are connected in series, and one end of the first resistor R1 is connected to the The positive pole of the power supply is connected to the first capacitor C1 at the other end, one end of the first capacitor C1 is connected to the first resistor R1, and the other end is connected to the negative pole of the power supply.
- the first capacitor C1 is used to discharge the charge when the level voltage of the cold start circuit is lowered, thereby reducing the risk of engine starting failure, and the first resistor R1 is used to prevent the instantaneous voltage from being too large.
- the above driving circuit may include a relay K, a starter motor M, an engine control unit EECU and a start switch.
- the power supply is respectively connected to the relay K, the b terminal of the starter motor M and the EECU, the EECU is connected to the coil of the relay K, the normally open contact of the relay K is connected to the s terminal of the starter motor M, the The starter motor M is connected to the engine, and the starter switch is connected to the EECU.
- the start switch is used to receive the start signal triggered by the user, and transmit the start signal to the EECU; the EECU is used to trigger the normally open contact of the relay K to close when the start signal is received; the relay K is used to close the normally open contact when receiving the control signal from the EECU; the starter motor M is used to drive the engine to run when the normally open contact of the relay K is closed.
- the drive circuit may further include a display screen controller and a second discharge module.
- One end of the display screen controller is connected to the start switch and power supply, the other end is connected to the EECU, and the second discharge module is connected in parallel to both ends of the display screen controller;
- the signal output the signal to the engine control component, and send the start signal to the EECU through the can signal;
- the second discharge module is used to release the charge when the level voltage of the cold start circuit is reduced, so as to provide the display screen
- the controller provides a steady state voltage. Since the drive circuit includes a display controller, the display controller can output signals to the engine control components, so that the user can intuitively see the starting reaction of the engine.
- the second discharge module may include a second capacitor C2 and a second resistor R2, the second capacitor C2 and the second resistor R2 are connected in series, and the second resistor R2 One end is connected to one end of the display screen controller, the other end of the second resistor R2 is connected to the second capacitor C2, one end of the second capacitor C2 is connected to the second resistor R2, and the second capacitor C2 The other end of the connected to the other end of the display controller.
- the second capacitor C2 is used to discharge the charge when the level voltage of the cold start circuit is lowered, so as to avoid the display screen being turned off due to the low voltage at the moment of starting, and the second resistor R2 is used to prevent the instantaneous voltage from being too large.
- the above-mentioned first capacitor C1 and second capacitor C2 may be farad capacitors. Since the first capacitor and the second capacitor are farad capacitors, the energy storage process of the first capacitor and the second capacitor is reversible. The first capacitor and the second capacitor can be charged when the voltage rises and discharged when the voltage drops, and then maintain the stability of the circuit.
- the drive circuit may further include a power management module.
- the power management module is connected between the power supply and the engine control assembly; the power management module is used for distributing charge to the start switch, the display screen controller, the engine control assembly and the Relay K. Since the drive circuit includes a power management module, charges can be distributed to different branches according to device requirements.
- first discharge module and the second discharge module in the embodiment of the present application can not only provide a steady-state voltage for the entire circuit in a transient state, but also provide an extended power supply for the entire circuit in a steady state, that is, a backup power supply, or That is to say, when the engine is running, the first discharge module and the second discharge module can still discharge electric charges when the voltage drops.
- the cold start circuit provided by the present application can not only be applied to the scene of starting a diesel engine, but also applicable to a starting system using an electric excavator or a gasoline engine.
- the cold start circuit provided by the present application can release charges when the level voltage of the cold start circuit decreases through the first discharge module connected in parallel at both ends of the power supply. In this way, at the moment of starting the engine, if the level voltage is pulled down, the first discharge module can make up for the voltage drop by releasing the charge, thereby reducing the risk of failure to start the engine.
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- Chemical & Material Sciences (AREA)
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- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
一种冷启动电路和挖掘机，应用于电子电路技术领域，可以降低发动机启动失败的风险。包括：电源、驱动电路、发动机以及第一放电模块；所述电源连接所述驱动电路，所述驱动电路连接所述发动机，所述第一放电模块并联在所述电源两端；所述驱动电路用于在接收到启动信号的情况下，驱动所述发动机转动；所述第一放电模块用于在所述冷启动电路的电平电压降低时释放电荷。
Description
相关申请的交叉引用
本申请要求于2021年5月31日提交的申请号为202110604582.4，发明名称为“冷启动电路和挖掘机”的中国专利申请的优先权，其通过引用方式全部并入本文。
本申请涉及电子电路技术领域，尤其涉及一种冷启动电路和挖掘机。
通常，在低温环境下，发动机机油的粘度会变得比较高，从而使发动机启动过程变得困难。
现有技术中，为了降低发动机启动失败的风险，可以在发动机启动前采用加热器对燃油箱的机油进行加热以便于发动机启动。这就需要在启动系统里增加加热器。然而，这样做会使得投入成本较高。
发明内容
本申请提供一种冷启动电路和挖掘机，用以解决现有技术中采用加热器对燃油箱的机油进行加热投入成本较高的缺陷，实现了通过较低的成本降低发动机启动失败风险的效果。
本申请提供一种冷启动电路，包括：电源、驱动电路、发动机以及第一放电模块；所述电源连接所述驱动电路，所述驱动电路连接所述发动机，所述第一放电模块并联在所述电源两端；所述驱动电路用于在接收到启动信号的情况下，驱动所述发动机转动；所述第一放电模块用于在所述冷启动电路的电平电压降低时释放电荷。
本申请提供的冷启动电路，可以通过并联在电源两端的第一放电模块，在冷启动电路的电平电压降低时释放电荷。如此，在发动机启动瞬间，若电平电压被拉低，则第一放电模块可以通过释放电荷弥补压降，从而降低发动机启动失败风险。
根据本申请提供的冷启动电路，所述第一放电模块包括第一电容和第一电阻，所述第一电容和所述第一电阻串联，所述第一电阻的一端连接所述电源的正极，另一端连接所述第一电容，所述第一电容的一端连接所述第一电阻，另一端连接所述电源的负极。
本申请提供的冷启动电路，由于第一放电模块包括第一电容，因此，可以通过第一电容释放电荷，从而减少发动机启动失败的风险，由于第一放电模块还包括第一电阻，因此，在第一电容放电时可以防止瞬时电压过大，从而保证电路的稳定性。
根据本申请提供的冷启动电路，所述驱动电路包括继电器、启动马达、发动机控制组件以及启动开关；所述电源分别连接所述继电器、所述启动马达的b端以及所述发动机控制组件，所述发动机控制组件连接所述继电器，所述继电器连接所述启动马达的s端、所述启动马达连接所述发动机，所述启动开关连接所述发动机控制组件。
根据本申请提供的冷启动电路，所述启动开关用于接收启动信号，并将所述启动信号传输至所述发动机控制组件；所述发动机控制组件用于在接收到所述启动信号的情况下，触发所述继电器的常开触点闭合；所述继电器用于在接收到所述发动机控制组件的控制信号的情况下，闭合常开触点；所述启动马达用于在所述继电器的常开触点闭合的情况下，带动所述发动机运转。
根据本申请提供的冷启动电路，所述驱动电路还包括显示屏控制器，所述显示屏控制器一端连接所述启动开关和所述电源，另一端连接所述发动机控制组件，所述显示屏控制器用于在接收到所述启动信号的情况下，输出信号给发动机控制组件。
本申请提供的冷启动电路，由于包括显示屏控制器，因此可以通过显示器控制器输出信号给发动机控制组件，从而使用户可以直观的看到发动机的启动反应。
根据本申请提供的冷启动电路，所述驱动电路还包括第二放电模块；所述第二放电模块并联在所述显示屏控制器两端；所述第二放电模块用于在所述冷启动电路的电平电压降低时释放电荷。
根据本申请提供的冷启动电路，所述第二放电模块包括第二电容和第 二电阻，所述第二电容和所述第二电阻串联，所述第二电阻的一端连接所述显示屏控制器的一端，所述第二电阻的另一端连接所述第二电容，所述第二电容的一端连接所述第二电阻，所述第二电容的另一端连接所述显示屏控制器的另一端。
本申请提供的冷启动电路，由于第二放电模块包括第二电容，因此，可以通过第二电容释放电荷，从而避免启动瞬间显示屏因为电压过低而熄屏，由于第二放电模块还包括第二电阻，因此，在第二电容放电时可以防止瞬时电压过大，从而保证电路的稳定性。
根据本申请提供的冷启动电路，所述第一电容和所述第二电容为法拉电容。
本申请提供的冷启动电路，由于第一电容和第二电容为法拉电容，因此第一电容和第二电容的储能过程是可逆的，第一电容和第二电容可以在电压升高时充电，在电压降低时放电，进而维持电路的稳定性。
根据本申请提供的冷启动电路，所述驱动电路还包括电源管理模块；所述电源管理模块连接在所述电源和所述发动机控制组件之间；所述电源管理模块用于将电荷分配给所述启动开关、所述显示屏控制器、所述发动机控制组件以及所述继电器。
本申请提供的冷启动电路，由于驱动电路包括电源管理模块，因此，可以根据器件需求将电荷分配给不同的支路。
本申请还提供一种挖掘机，包括如上述任一种所述的冷启动电路。
为了更清楚地说明本申请或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请提供的冷启动电路结构示意图之一；
图2是本申请提供的冷启动电路结构示意图之二；
图3是本申请提供的冷启动电路结构示意图之三；
图4是本申请提供的冷启动电路结构示意图之四；
图5是本申请提供的冷启动电路结构示意图之五；
图6是本申请提供的冷启动电路结构示意图之六。
以下通过特定的具体实例说明本申请的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本申请的其他优点与功效。本申请还可以通过另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本申请的精神下进行各种修饰或改变。需说明的是，在不冲突的情况下，以下实施例及实施例中的特征可以相互组合。
需要说明的是，本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
为了便于清楚描述本申请实施例的技术方案，在本申请实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分，本领域技术人员可以理解“第一”、“第二”等字样并不是在对数量和执行次序进行限定。
下面结合图1-图6对本申请提供的冷启动电路进行详细描述。需要理解的是，本申请实施例为了阐释的目的而描述了本申请的一些示例性实施例，本申请可通过附图中没有具体示出的其他方式来实现。
如图1所示，本申请提供一种冷启动电路，包括：电源、驱动电路、发动机以及第一放电模块。电源的正极连接驱动电路，负极接地；该电源可以为蓄电池。驱动电路连接发动机；第一放电模块并联在电源两端。
用户可以一键触发启动信号，在驱动电路接收到该启动信号的情况下， 驱动电路可以驱动发动机转动；由于在电路启动瞬间，电路的电平电压会被拉低，从而导致发动机启动失败，因此，为避免这种情况的发生，在冷启动电路的电平电压降低时，第一放电模块可以通过释放电荷补充电路压降，由于补充了电路压降，因此，发动机的动力不会受到影响。
可选的，如图2所示，上述第一放电模块可以包括第一电容C1和第一电阻R1，该第一电容C1和第一电阻R1串联，所述第一电阻R1的一端连接所述电源的正极，另一端连接所述第一电容C1，所述第一电容C1的一端连接所述第一电阻R1，另一端连接所述电源的负极。其中，第一电容C1用于在冷启动电路的电平电压降低时释放电荷，从而减少发动机启动失败的风险，第一电阻R1用于防止瞬时电压过大。
可选的，如图3所示，上述驱动电路可以包括继电器K、启动马达M、发动机控制组件EECU以及启动开关。所述电源分别连接所述继电器K、所述启动马达M的b端以及EECU，EECU连接所述继电器K的线圈，所述继电器K的常开触点连接所述启动马达M的s端、所述启动马达M连接所述发动机，所述启动开关连接EECU。
启动开关用于接收用户触发的启动信号，并将所述启动信号传输至EECU；EECU用于在接收到所述启动信号的情况下，触发所述继电器K的常开触点闭合；所述继电器K用于在接收到所述EECU的控制信号的情况下，闭合常开触点；所述启动马达M用于在所述继电器K的常开触点闭合的情况下，带动所述发动机运转。
可选的，如图4所示，所述驱动电路还可以包括显示屏控制器和第二放电模块。所述显示屏控制器一端连接所述启动开关和电源，另一端连接EECU，所述第二放电模块并联在所述显示屏控制器两端；所述显示屏控制器用于在接收到所述启动信号的情况下，输出信号给发动机控制组件，并通过can信号将启动信号发送给EECU；所述第二放电模块用于在所述冷启动电路的电平电压降低时释放电荷，从而为显示屏控制器提供稳态电压。由于驱动电路包括显示屏控制器，因此可以通过显示器控制器输出信号给发动机控制组件，从而使用户可以直观的看到发动机的启动反应。
可选的，如图5所示，所述第二放电模块可以包括第二电容C2和第二电阻R2，所述第二电容C2和所述第二电阻R2串联，所述第二电阻R2 的一端连接所述显示屏控制器的一端，所述第二电阻R2的另一端连接所述第二电容C2，所述第二电容C2的一端连接所述第二电阻R2，所述第二电容C2的另一端连接所述显示屏控制器的另一端。其中，第二电容C2用于在冷启动电路的电平电压降低时释放电荷，从而避免启动瞬间显示屏因为电压过低而熄屏，第二电阻R2用于防止瞬时电压过大。
可选的，上述第一电容C1和第二电容C2可以为法拉电容。由于第一电容和第二电容为法拉电容，因此第一电容和第二电容的储能过程是可逆的，第一电容和第二电容可以在电压升高时充电，在电压降低时放电，进而维持电路的稳定性。
可选的，如图6所示，所述驱动电路还可以包括电源管理模块。所述电源管理模块连接在所述电源和所述发动机控制组件之间；所述电源管理模块用于将电荷分配给所述启动开关、所述显示屏控制器、所述发动机控制组件以及所述继电器K。由于驱动电路包括电源管理模块，因此，可以根据器件需求将电荷分配给不同的支路。
需要说明的是，本申请实施例中的第一放电模块和第二放电模块不仅可以瞬态时为整个电路提供稳态电压，还可以稳态时给整个电路提供扩充电源，即备用电源，也就是说，当发动机处于运转状态的情况下，第一放电模块和第二放电模块仍可以在电压降低时释放电荷。
可选的，本申请提供的冷启动电路不仅可以应用于柴油发动机启动场景，采用电动挖掘机或汽油机的启动系统也同样适用。
本申请提供的冷启动电路，可以通过并联在电源两端的第一放电模块，在冷启动电路的电平电压降低时释放电荷。如此，在发动机启动瞬间，若电平电压被拉低，则第一放电模块可以通过释放电荷弥补压降，从而降低发动机启动失败风险。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。
Claims (10)
- 一种冷启动电路，包括：电源、驱动电路、发动机以及第一放电模块；所述电源连接所述驱动电路，所述驱动电路连接所述发动机，所述第一放电模块并联在所述电源两端；所述驱动电路用于在接收到启动信号的情况下，驱动所述发动机转动；所述第一放电模块用于在所述冷启动电路的电平电压降低时释放电荷。
- 根据权利要求1所述的冷启动电路，其中所述第一放电模块包括第一电容和第一电阻，所述第一电容和所述第一电阻串联，所述第一电阻的一端连接所述电源的正极，另一端连接所述第一电容，所述第一电容的一端连接所述第一电阻，另一端连接所述电源的负极。
- 根据权利要求2所述的冷启动电路，其中所述驱动电路包括继电器、启动马达、发动机控制组件以及启动开关；所述电源分别连接所述继电器、所述启动马达的b端以及所述发动机控制组件，所述发动机控制组件连接所述继电器，所述继电器连接所述启动马达的s端、所述启动马达连接所述发动机，所述启动开关连接所述发动机控制组件。
- 根据权利要求3所述的冷启动电路，其中，所述启动开关用于接收启动信号，并将所述启动信号传输至所述发动机控制组件；所述发动机控制组件用于在接收到所述启动信号的情况下，触发所述继电器的常开触点闭合；所述继电器用于在接收到所述发动机控制组件的控制信号的情况下，闭合常开触点；所述启动马达用于在所述继电器的常开触点闭合的情况下，带动所述发动机运转。
- 根据权利要求3所述的冷启动电路，其中，所述驱动电路还包括显示屏控制器，所述显示屏控制器一端连接所述启动开关和所述电源，另一端连接所述发动机控制组件，所述显示屏控制器用于在接收到所述启动信号的情况下，输出信号给发动机控制组件。
- 根据权利要求5所述的冷启动电路，其中，所述驱动电路还包括第二放电模块；所述第二放电模块并联在所述显示屏控制器两端；所述第 二放电模块用于在所述冷启动电路的电平电压降低时释放电荷。
- 根据权利要求4所述的冷启动电路，其中，所述第二放电模块包括第二电容和第二电阻，所述第二电容和所述第二电阻串联，所述第二电阻的一端连接所述显示屏控制器的一端，所述第二电阻的另一端连接所述第二电容，所述第二电容的一端连接所述第二电阻，所述第二电容的另一端连接所述显示屏控制器的另一端。
- 根据权利要求7所述的冷启动电路，其中，所述第一电容和所述第二电容为法拉电容。
- 根据权利要求3所述的冷启动电路，其中，所述驱动电路还包括电源管理模块；所述电源管理模块连接在所述电源和所述发动机控制组件之间；所述电源管理模块用于将电荷分配给所述启动开关、所述显示屏控制器、所述发动机控制组件以及所述继电器。
- 一种挖掘机，其中，包括权利要求1-9中任一项所述的冷启动电路。
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