Circuit system for starting trailer by storage battery

Abstract

The utility model relates to a circuit system for starting a trailer by a storage battery, which comprises a main loop and a control circuit, and the main loop consists of two groups of batteries, a total output negative end X3, a first output positive end X1 and a second output positive end X2 with variable voltage. In a first working state, the two groups of batteries are connected in parallel, so that the common negative end is connected with the total output negative end X3, and the common positive end is connected with the first output positive end X1 and the second output positive end X2 respectively. In a second working state, the two groups of batteries are connected in series, the first output positive end X1 is connected to the center tap, and the second output positive end X2 is connected with the total positive end; and the total output negative end X3 is connected with the total negative end. The control circuit enables the main loop to be switched between a first working state and a second working state. According to the utility model, two groups of voltages forming a loop can be output through the three external output ends only by arranging two groups of batteries, and the output voltage of one group is changed along with the change of the working condition of an electric appliance.

Description

Technical Field

[0001] The utility model relates to a circuit system for starting a trailer with a battery. Background Art

[0002] In some power usage scenarios, the power supply unit is required to provide multiple variable currents for the electrical appliances. For example, at the same power input socket, the electrical appliance first obtains a 12V voltage. After working for a period of time, the voltage needs to be reduced to 6V and continue to be supplied. Or the electrical appliance has multiple input interfaces, and the power supply voltage required for each input interface is inconsistent, or the voltage required for a certain input interface needs to change with the working conditions.

[0003] For example: During aircraft maintenance, a ground unit is required to power the aircraft. One aircraft is conveniently powered by a ground mobile battery. The ground mobile battery is connected to the aircraft input socket through an aviation plug interface. According to the aircraft operating conditions, the power supply required by the ground mobile battery for the aircraft is as follows:

[0004] 1. In order to adapt to the aircraft, the ground mobile battery needs to input a negative pole and two positive pole power supplies for the aircraft to form a circuit.

[0005] 2. The power supply changes with the aircraft operating conditions. For example, the electrical appliance first needs to obtain a certain voltage value. After working for a period of time, one of the positive power supply voltages needs to be increased and continue to supply power.

[0006] However, there is currently no mobile power supply device that meets the requirements of this operating condition. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a circuit system of a battery-started trailer, which is used to provide the required power for an aircraft.

[0008] The utility model discloses a circuit system of a battery-started trailer, which comprises a main circuit and a control circuit.

[0009] The main circuit is composed of at least two groups of batteries and at least three external output terminals connected to electrical appliances.

[0010] The three external output terminals include: a total output negative terminal X3, a first output positive terminal X1, and a second output positive terminal X2 with a variable voltage.

[0011] The control circuit switches the main circuit between a first working state and a second working state.

[0012] The first working state is: two groups of batteries are connected in parallel to form a common negative terminal and a common positive terminal; and the common negative terminal is connected to the total output negative terminal X3, and the common positive terminal is connected to the first output positive terminal X1 and the second output positive terminal X2 respectively.

[0013] The second working state is: two groups of batteries are connected in series to form a total negative terminal, a total positive terminal, and a middle tap; and the first output positive terminal X1 is connected to the middle tap, the second output positive terminal X2 is connected to the total positive terminal; the total output negative terminal X3 is connected to the total negative terminal.

[0014] The two battery groups include a first battery GB1 and a second battery GB2; wherein the first battery has a first battery positive terminal gb11 and a first battery negative terminal gb12; and the second battery has a second battery positive terminal gb21 and a second battery negative terminal gb22.

[0015] The main circuit is provided with a first switch KM1 and a third switch KM3 for switching between a first working state and a second working state. The third switch KM3 is a normally open switch.

[0016] The first battery positive terminal gb11 is respectively connected to the first output positive terminal X1 and the first switch first terminal km11, the first switch normally closed terminal Km12 is connected to the second output positive terminal X2 and the second battery positive terminal gb21; the first switch normally open terminal Km13 is connected to the second battery negative terminal gb22.

[0017] Two ends of the third switch KM3 are connected to the first battery negative terminal gb12 and the second battery negative terminal gb22 respectively.

[0018] The first battery negative terminal gb12 is directly connected to the total output negative terminal X3.

[0019] A second switch KM2 is also provided, and the second switch KM2 is a normally open switch; the first battery positive terminal gb11 is connected to the second switch input terminal km21, and the second switch output terminal km22 is respectively connected to the first output positive terminal X1 and the first switch first terminal km11.

[0020] A circuit is provided for closing the second switch KM2 through the electrical appliance, specifically:

[0021] It has an external socket adapted to the electrical appliance and used for pluggable connection of the electrical appliance; the external socket includes a first external socket P1, and the first external socket P1 is connected to the total output negative terminal X3 through the electrical appliance for conduction.

[0022] One end of the second switch electromagnetic coil L2 is connected to the positive terminal of the first battery, and the other end of the second switch electromagnetic coil L2 is connected to the first external socket P1.

[0023] The control circuit is used to switch the main circuit between the first working state and the second working state; specifically:

[0024] Put the main circuit in the first working state:

[0025] The third switch KM3 is closed to connect the negative terminal gb12 of the first battery with the negative terminal gb22 of the second battery;

[0026] Connecting the first battery positive terminal gb11 to the first output positive terminal X1;

[0027] The first switch first terminal km11 and the first switch normally closed terminal Km12 are closed and the first switch normally open terminal Km13 are disconnected, so that the first battery positive terminal gb11 and the second battery positive terminal gb21 are connected; two battery groups are connected in parallel.

[0028] Put the main circuit in the second working state:

[0029] The third switch KM3 is turned off to cut off the connection between the negative terminal gb12 of the first battery and the negative terminal gb22 of the second battery;

[0030] The first end km11 of the first switch is closed with the first normally open end Km13 and is disconnected with the first normally closed end Km12 at the same time, so that the positive end gb11 of the first battery is connected with the negative end gb22 of the second battery; two groups of batteries are connected in series.

[0031] The control circuit includes:

[0032] A circuit for closing and opening the third switch KM3;

[0033] The circuit for controlling the first switch causes the first end km11 of the first switch to be switched between the first switch normally closed end Km12 and the first switch normally open end Km13;

[0034] A circuit that links the third switch KM3 and the first switch KM1.

[0035] The circuit for closing and opening the third switch KM3 is specifically:

[0036] The third switch KM3 has a third switch first end km31, a third switch second end km32, and a third switch third end km33. When the third switch is closed, the three ends are connected to each other, and when the third switch is opened, the three ends are disconnected from each other; one end of the third switch electromagnetic coil L3 is connected to the first external socket P1; and two ends of the third switch electromagnetic coil L3 are connected to the positive terminal of the first battery.

[0037] The circuit for controlling the first switch is specifically:

[0038] One end of the first switch electromagnetic coil L1 is connected to the negative end of the first battery, and the other end of the first switch electromagnetic coil L1 is connected to the positive end of the first battery.

[0039] The circuit for linking the third switch KM3 and the first switch KM1 is specifically:

[0040] (1) A second control switch KA2 is provided for switching the power supply between the third switch electromagnetic coil L3 and the first switch electromagnetic coil L1.

[0041] Among them, one end of the second control switch KA2 is connected to the positive terminal gb11 of the first battery; the normally closed end of the second control switch KA2 is connected to the second end of the third switch electromagnetic coil L3, and the normally open end of the second control switch KA2 is connected to one end of the first switch electromagnetic coil L1.

[0042] The external socket also includes a second external socket P2 and a third external socket P3. The second external socket P2 is connected to the positive terminal gb11 of the first battery, and the electrical appliance can make the second external socket P2 and the third external socket P3 disconnected or connected; one end of the second control switch electromagnetic coil L02 is connected to the negative terminal of the first battery, and the other end of the second control switch electromagnetic coil L02 is connected to the third external socket P3.

[0043] (2) The third switch KM3 and the first switch KM1 are interlocked, specifically:

[0044] A normally closed switch first control switch KA1 is provided between the second end of the third switch electromagnetic coil L3 and the normally closed end of the second control switch KA2; two ends of the first control switch electromagnetic coil L01 are respectively connected to the first switch first end km11 and the first switch normally closed end Km12;

[0045] A third control switch KA3 is arranged between one end of the first switch electromagnetic coil L1 and the negative end of the first battery, and the third control switch KA3 is a normally closed switch; a circuit is arranged to control the third control switch KA3, specifically: one end of the third control switch electromagnetic coil L03 is connected to the positive end of the first battery, and the second end of the third control switch electromagnetic coil L03 is connected to the third end km33 of the third switch.

[0046] Beneficial technical effects of the utility model:

[0047] The power supply vehicle provided by the utility model only needs to be equipped with two groups of batteries, and can output two groups of voltages constituting a loop through three external output terminals, and one group of output voltages changes with the change of the working condition of the electrical appliance.

[0048] In any power supply working state, two groups of batteries jointly participate in supplying power to electrical appliances, rather than two groups of batteries each being responsible for supplying power in one working state, thus maintaining the balance and stability of the battery power.

[0049] The utility model controls the start-up control and the voltage conversion switching through the electrical system (non-digital control system), thereby ensuring the stability of the output, reducing the failure rate, and preventing the impact on the aircraft.

[0050] The circuit system of the utility model is simple and efficient, does not have resistive components, and has low energy loss. Although the circuit system is simple, it still has an interlocking mechanism and a redundant anti-fault and anti-error start design. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of the utility model system in the first working state, mainly showing the conduction state of each switch in the main circuit.

[0052] Figure 2 It is a schematic diagram of the utility model system in the first working state, mainly showing the conduction state of each switch in the main circuit.

[0053] Figure 3 It is a circuit diagram of the utility model, which mainly shows the main circuit and the control circuit structure.

[0054] Figure 4 It is a schematic diagram of the aviation plug interface of electrical appliances adapted by the utility model.

[0055] The reference numerals are as follows:

[0056] A first battery GB1; a second battery GB2;

[0057] The positive terminal of the first battery gb11; the negative terminal of the first battery gb12; the positive terminal of the second battery gb21; the negative terminal of the second battery gb22;

[0058] Total output negative terminal X3; first output positive terminal X1; second output positive terminal X2;

[0059] Connector XP; External socket XS; Electrical appliance R;

[0060] First external socket P1; second external socket P2; third external socket P3; second plug core P4; first plug core P5; second plug core P4; third plug core P6;

[0061] A first switch KM1; a third switch KM3; a second switch KM2;

[0062] The first switch first terminal km11; the first switch normally closed terminal Km12; the first switch normally open terminal Km13;

[0063] The second switch input terminal km21; the second switch electromagnetic coil L2;

[0064] A first end km31 of the third switch; a second end km32 of the third switch; a third end km33 of the third switch;

[0065] A first switch electromagnetic coil L1; a second switch electromagnetic coil L2; a third switch electromagnetic coil L3;

[0066] A first control switch electromagnetic coil L01; a second control switch electromagnetic coil L02; a third control switch electromagnetic coil L03;

[0067] First control switch KA1; second control switch KA2; third control switch KA3; electrical appliance switch K11;

[0068] A first indicating light emitting diode LED1; a second indicating light emitting diode LED2;

[0069] Special situation switch SA2; Emergency stop switch SA1. DETAILED DESCRIPTION

[0070] Reference Figure 1-4 A specific implementation method will be described.

[0071] The main circuit of the utility model is composed of at least two groups of batteries. The battery is a storage battery, which can be a single storage battery, so the utility model needs at least two storage batteries; it can also be a battery group, each group of batteries is composed of multiple batteries connected in series or in parallel. Regardless of whether the batteries in this battery group are connected in series or in parallel, or a single storage battery, the utility model only needs each group of batteries to have outputs at both ends of the battery, the positive and negative ends.

[0072] The two battery groups include a first battery GB1 and a second battery GB2.

[0073] Due to the output voltage of a battery pack of the utility model, the output positive terminal thereof can be 6V, 12V, 24V, 36V, 72V, or other voltage values.

[0074] Therefore, an example is: wherein the first battery has a first battery positive terminal gb11 and a first battery negative terminal gb12; the second battery has a second battery positive terminal gb21 and a second battery negative terminal gb22. When the output positive terminal of a battery group is 6V, then the first output voltage is 6V and the second output voltage is 12V.

[0075] The specific voltage required is determined according to the parameters of the electrical appliances.

[0076] Example 1:

[0077] The electrical appliance R of the present invention may be a vehicle, an aircraft, a device, another storage battery, a tool, or a lighting device.

[0078] refer to Figure 4The electrical appliance R has an external terminal, which is a pluggable plug, including a main plug connected to the main circuit of the utility model, the main plug has at least three sockets, which are used to be plugged into the total output negative terminal X3, the first output positive terminal X1, and the second output positive terminal X2 of the utility model, and are mainly used to draw power from the utility model; an auxiliary plug connected to the control circuit of the utility model, hereinafter referred to as a connector XP, the connector XP is connected to the external socket XS of the utility model, and has three plug cores, including a first plug core P5 plugged into the first external socket P1 of the external socket XS, a second plug core P4 plugged into the second external socket P2, and a third plug core P6 plugged into the third external socket P3.

[0079] In one example, the main plug and the auxiliary plug are each a plug, which is respectively plugged into different external sockets of the circuit board of the utility model. In another example, the main plug and the auxiliary plug are integrated into one plug.

[0080] The electrical appliance R has at least one switch, the electrical appliance switch K11, which is used to control the conduction and disconnection between the third plug core P6 and the second plug core P4. The control signal is generated by the electrical appliance, and of course it can also be generated by a third device, or generated by an external operation of an operator, etc. In short, the control signal can make the third plug core P6 and the second plug core P4 conductive or non-conductive. Of course, the electrical appliance can also be provided with a switch for conducting or disconnecting the first plug core P5 and the total output negative terminal X3, or this switch can be omitted, and the circuit of the utility model can also work normally.

[0081] Example 2:

[0082] The utility model has three external output terminals, and the three output terminals are not necessarily only three sockets, and one output terminal may also be connected to the plug cores of multiple electrical appliances, as long as the multiple plug cores connected to one output terminal have the same power parameters.

[0083] The three external output terminals include: a total output negative terminal X3, a first output positive terminal X1, and a second output positive terminal X2 with a variable voltage. The voltage of the total output negative terminal X3 is 0, and the output of the first output positive terminal X1 is a first output voltage (the first output voltage is maintained in both the first working state and the second working state, and the first output voltage is also equal to the voltage output from the positive terminal of the battery when there is only one set of batteries); the second output positive terminal X2 is a variable voltage output, the first output voltage is output in the first working state, and the second output voltage is output in the second working state, wherein the second output voltage is equal to the voltage output from the total positive terminal when two sets of batteries are connected in series, or can be regarded as twice the first output voltage.

[0084] In one example, the output positive terminal voltage of a battery pack is 24V, so the first output voltage is 24V and the second output voltage is 48V.

[0085] To this end, the main circuit is connected as follows:

[0086] refer to Figure 1 In the first working state, two groups of batteries are connected in parallel: forming a common negative terminal and a common positive terminal; and the common negative terminal is connected to the total output negative terminal X3, and the common positive terminal is connected to the first output positive terminal X1 and the second output positive terminal X2. Therefore, the total output negative terminal X3 is a negative pole, and the output voltages of the first output positive terminal and the second output positive terminal X2 are both the first output voltage.

[0087] refer to Figure 2 In the second working state, the two groups of batteries are connected in series: forming a total negative terminal, a total positive terminal, and a middle tap; and the first output positive terminal X1 is connected to the middle tap, the second output positive terminal X2 is connected to the total positive terminal; the total output negative terminal X3 is connected to the total negative terminal. Therefore, the total output negative terminal X3 is a negative pole, and the voltage of the first output positive terminal connected to the middle tap is the first output voltage. The output voltage of the second output positive terminal X2 is the second output voltage.

[0088] The control circuit switches the main circuit between a first working state and a second working state.

[0089] The main circuit uses the first switch KM1 and the third switch KM3. The third switch KM3 is a normally open switch. The three switches can use DC contactors, such as the model MZJ-600 DC contactor. By switching on different output terminals, the main circuit can be switched between the battery series connection and parallel connection.

[0090] The first switch is a double-control switch, having a first switch first terminal km11, a first switch normally closed terminal Km12, and a first switch normally open terminal. The second switch KM2 is a normally open switch. The third switch KM3 has a third switch first terminal km31, a third switch second terminal km32, and a third switch third terminal km33. When the third switch is closed, the three terminals are connected to each other, and when the third switch is disconnected, the three terminals are disconnected from each other. The connection method of each switch with the battery and the output terminal in the main circuit is as follows:

[0091] refer to Figure 1 , 2 The first battery negative terminal gb12 is directly connected to the total output negative terminal X3, and is connected to the second battery negative terminal gb12 through the third switch KM3.

[0092] The first battery positive terminal gb11 is respectively connected to the first output positive terminal X1 and the first switch first terminal km11, the first switch normally closed terminal Km12 is connected to the second output positive terminal X2 and the second battery positive terminal gb21; the first switch normally open terminal Km13 is connected to the second battery negative terminal gb22.

[0093] The first battery positive terminal gb11 is connected to the second switch input terminal km21, and the second switch output terminal km22 is connected to the first output positive terminal X1 and the first switch first terminal km11 respectively.

[0094] (1): When the third switch KM3 is closed, the first battery negative terminal gb12 and the second battery negative terminal gb22 are connected to form a common negative terminal, and the common negative terminal is connected to the total output negative terminal X3.

[0095] At this time, the positive terminal of the first battery is connected to the first terminal km11 of the first switch, the first terminal km11 of the first switch is closed with the normally closed terminal Km12 of the first switch and disconnected with the normally open terminal Km13 of the first switch, so that the positive terminal of the first battery is connected to the positive terminal of the second battery; a common positive terminal is formed. The first output positive terminal X1 and the second output positive terminal X2 are both connected to the common positive terminal at this time. When the batteries are connected in parallel, the output voltage remains unchanged and is the first voltage output. At this time, the main circuit is in the first working state.

[0096] (2): The third switch KM3 is turned off to cut off the connection between the negative terminal gb12 of the first battery and the negative terminal gb22 of the second battery.

[0097] The first battery positive terminal gb11 is connected to the first output positive terminal X1 and the first switch first terminal km11; the first output positive terminal X1 has a first output voltage at this time.

[0098] The first switch first terminal km11 is closed with the first switch normally open terminal Km13 and is disconnected with the first switch normally closed terminal Km12, so that the positive terminal of the first battery is connected with the negative terminal of the second battery; two groups of batteries are connected in series; the positive terminal of the second battery becomes the total positive terminal, the second output positive terminal X2 is connected to the total positive terminal and has a second voltage; the first output positive terminal X1 is connected to the middle tap and has a first voltage. At this time, the main circuit is in the second working state.

[0099] The second switch KM2 is mainly used to connect the output of the positive terminal of the first battery. Regardless of the first working state or the second working state, the second switch needs to be in a closed state.

[0100] The control circuit of the second switch KM2 can be controlled to close through an adapted electrical appliance, one end of the second switch electromagnetic coil L2 is connected to the positive terminal of the first battery, and the other end of the second switch electromagnetic coil L2 is connected to the first external socket P1. The first external socket P1 is connected to the total output negative terminal X3 through the electrical appliance to form a part of the loop. When the first external socket P1 is connected to the total output negative terminal X3 through the electrical appliance, current flows through the second switch electromagnetic coil L2, and the second switch KM2 can be closed.

[0101] Example 3:

[0102] refer to Figure 3, control circuit design. Mainly refers to the control circuit of the first switch electromagnetic coil L1 and the third switch electromagnetic coil L3.

[0103] (i) The control circuit of the third switch electromagnetic coil L3 is used to close and open the third switch KM3.

[0104] In one example, one end of the third switch electromagnetic coil L3 is connected to the first external socket P1. When the electrical appliance is plugged into the external socket, the first external socket P1 is connected to the total output negative terminal X3 through the electrical appliance, forming a part of the loop; the other end of the third switch electromagnetic coil L3 is connected to the positive terminal of the first battery. Therefore, when the first external socket P1 is connected to the total output negative terminal X3 through the electrical appliance, the third switch KM3 can be operated.

[0105] (II) The first switch first terminal km11 can be switched between the first switch normally closed terminal Km12 and the first switch normally open terminal Km13, and one end of the first switch electromagnetic coil L1 is connected to the negative terminal of the first battery, and the other end of the first switch electromagnetic coil L1 is connected to the positive terminal of the first battery. When the first switch electromagnetic coil L1 is working, the first switch first terminal km11 is switched to normally open, otherwise it remains at the normally closed terminal.

[0106] (III) In order to prevent the third switch KM3 and the first switch KM1 from working at the same time, a linkage circuit is provided:

[0107] (1) A second control switch KA2 is provided for switching the power supply between the third switch electromagnetic coil L3 and the first switch electromagnetic coil L1.

[0108] Among them, one end of the second control switch KA2 is connected to the positive terminal gb11 of the first battery; the normally closed end of the second control switch KA2 is connected to the second end of the third switch electromagnetic coil L3, and the normally open end of the second control switch KA2 is connected to one end of the first switch electromagnetic coil L1.

[0109] Through the control of the electrical appliance, the second external socket P2 is connected to the third external socket P3; the two ends of the second control switch electromagnetic coil L02 are connected to the third external socket P3, and one end of the second control switch electromagnetic coil L02 is connected to the negative terminal of the first battery. When the third external socket P3 is connected to the second external socket P2, the second control switch electromagnetic coil L02 will be energized, so that the second control switch KA2 will work, that is, the power supply of the third switch electromagnetic coil L3 will be disconnected, and the power supply will be supplied to the first switch electromagnetic coil L1. The synchronous switching of the working state between the third switch KM3 and the first switch KM1 is completed.

[0110] (2) Interlock the third switch KM3 and the first switch KM1: When the third switch KM3 is closed, the first switch first end km11 and the first switch normally closed end Km12 are closed; when the first switch first end km11 and the first switch normally open end Km13 are closed, the third switch KM3 is opened. The circuit is specifically:

[0111] A first control switch KA1 is provided to cut off the power supply of the third switch electromagnetic coil L3, and the first control switch KA1 is a normally closed switch. The first control switch KA1 is provided between the second end of the third switch electromagnetic coil L3 and the normally closed end of the second control switch KA2, and the input end of the first control switch KA1 is connected to the normally closed end of the second control switch KA2, and the output end of the first control switch KA1 is connected to the second end of the third switch electromagnetic coil L3. One end of the first control switch electromagnetic coil L01 is connected to the first end km11 of the first switch, and the two ends of the first control switch electromagnetic coil L01 are connected to the normally closed end Km12 of the first switch. When the first end km11 of the first switch is disconnected from the normally closed end Km12 of the first switch, a potential difference is formed between one end of the first control switch electromagnetic coil L01 and the two ends of the first control switch electromagnetic coil L01, and current will pass through the first control switch electromagnetic coil L01 and start working. The operation of the first switch KM1 will cut off the power supply of the third switch electromagnetic coil L3.

[0112] A third control switch KA3 is provided to cut off the power supply of the first switch electromagnetic coil L1. The third control switch KA3 is provided between one end of the first switch electromagnetic coil L1 and the negative end of the first battery. The third control switch KA3 is a normally closed switch. One end of the third control switch electromagnetic coil L03 is connected to the positive end of the first battery, and two ends of the third control switch electromagnetic coil L03 are connected to the third end km33 of the third switch. When the third switch is turned on, the third control switch electromagnetic coil L03 can be turned on. When the third control switch KA3 works, the power supply of the first switch electromagnetic coil L1 will be cut off, so that the first switch is switched to the state of turning on the normally closed end Km12 of the first switch.

[0113] Therefore, the third switch KM3 and the first switch KM1 are interlocked.

[0114] Example 4:

[0115] refer to Figure 3 A first indicator light emitting diode LED1 is also provided, the input end of the first indicator light emitting diode is connected to the positive end of the first battery, and the output end of the first indicator light emitting diode is connected to the first external socket P1; therefore, when the first external socket P1 is powered on, the first indicator light emitting diode LED1 lights up, indicating that the circuit starts working.

[0116] A second indicator light emitting diode LED2 is also provided, and an input end of the second indicator light emitting diode LED2 is connected between the first end km11 and the normally closed end Km12 of the first switch KM1. When the first end km11 and the normally closed end Km12 of the first switch KM1 are disconnected, a voltage difference is generated across the second indicator light emitting diode LED2, and the second indicator light emitting diode LED2 lights up, indicating that there is a second output voltage at the second output positive end X2.

[0117] Of course, in order to prevent the conduction state of the first indicator light emitting diode LED1 and the second indicator light emitting diode LED2 from affecting the operation of the control circuit, so that the conduction of the first indicator light emitting diode LED1 and the second indicator light emitting diode LED2 to the control circuit does not reach the current and voltage that start each switch, the light emitting diode first uses a low-power diode, and a resistor is set at the input end of the light emitting diode for voltage reduction. Please note that the resistor set here does not conflict with the "no resistive components are set, and energy loss is small" pointed out in the "beneficial technical effects". The resistor here is only the resistor set for the light emitting diode, and does not actually participate in the conduction of each switch of the entire control circuit and the conduction of the components of the main circuit.

[0118] A special situation switch SA2 is also provided, whose two ends are connected to the negative terminal gb12 of the first battery and the second switch electromagnetic coil L2 and the third switch electromagnetic coil L3. The special situation switch SA can be a manual switch, which will skip the first external socket P1 and directly turn on the second switch electromagnetic coil L2 and the third switch electromagnetic coil L3 when working, and is used for working in situations such as debugging and maintenance.

[0119] An emergency stop switch SA1 is also provided, which is installed on the lines of the first external socket P1, the second external socket P2, and the third external socket P3, and can be cut off by pressing it in an emergency.

[0120] Example 5:

[0121] The battery of the utility model can be installed on a mobile vehicle as a portable and portable power supply device. The main circuit and control circuit in Examples 2, 3 and 4 can be realized by being arranged on a circuit board. All devices except the battery are set on the circuit board, and all interfaces and sockets are pulled out of the casing. The indicator light emitting diode in Example 4 is installed on the casing for easy operation indication, and the special situation switch SA2 and the emergency stop switch SA1 are installed on the casing for easy operation.

[0122] Of course, a better way to implement it is to arrange an electrical cabinet on the mobile vehicle, install each switch device (first switch KM1, third switch KM3, third switch KM3, first control switch, and other switch devices) into the electrical cabinet, and connect the power cord according to Examples 2, 3, and 4.

[0123] Example 6:

[0124] The working method of the battery starting circuit system provides the electrical appliance with: one output negative pole, two output positive poles, and two output states.

[0125] The first output state is: the first output voltage is between the first output positive terminal X1 and the total output negative terminal X3, and the first output voltage is between the second output positive terminal X2 and the total output negative terminal X3;

[0126] The second output state is: the first output voltage is between the first output positive terminal X1 and the total output negative terminal X3, the first output voltage is between the first output positive terminal X1 and the second output positive terminal X2, and the second output voltage is between the second output positive terminal X2 and the total output negative terminal X3.

[0127] The methods for obtaining the two output states are as follows:

[0128] S1: Obtain the first output state: the electrical appliance connects the first external socket P1 and the total output negative terminal X3, so that the current at the positive terminal of the first battery passes through the second switch electromagnetic coil L2 and the third switch electromagnetic coil L3, and then passes through the first external socket P1 back to the total output negative terminal X3, forming a loop, so that the second switch KM2 and the third switch KM3 work, and the first end km11 of the first switch is connected to the normally closed end Km12 of the first switch; the first output positive terminal X1 and the second output positive terminal X2 are both connected to the first power supply positive terminal and the second power supply positive terminal, and the total output negative terminal X3 is simultaneously connected to the first power supply negative terminal and the second power supply negative terminal, so that the first output positive terminal X1 and the second output positive terminal X2 obtain the first output voltage.

[0129] When the first output state is obtained, the power supply to the first switch electromagnetic coil L1 is further disconnected, specifically: after the third switch KM3 is turned on, the third control switch electromagnetic coil L03 is energized, the third control switch KA3 is converted from normally closed to open, and the first switch electromagnetic coil L1 is de-energized, and the first switch keeps the first switch first end km11 connected to the first switch normally closed end Km12.

[0130] S2: Transition to the second output state:

[0131] When in the first output state, the electrical appliance connects the second external socket P2 and the third external socket P3, so that the current at the positive terminal of the first battery returns to the negative terminal of the first battery through the second control switch electromagnetic coil L02, and the second control switch KA2 works, and the normally closed end of the second control switch KA2 is disconnected, so that the third switch electromagnetic coil L3 stops working, and the third switch KM3 is disconnected; the normally open end of the second control switch KA2 is turned on, so that the first switch electromagnetic coil L1 is turned on, and the first switch KM1 works, and the first end km11 of the first switch is closed with the normally open end Km13 of the first switch and disconnected from the normally closed end Km12 of the first switch, so that the total output negative terminal X3 is only connected to the negative terminal of the first power supply, the first output positive terminal X1 is connected to the positive terminal of the first power supply and obtains the first voltage, the positive terminal of the first power supply is connected to the negative terminal of the second power supply, and the second output positive terminal X2 is connected to the second output positive terminal to obtain the second voltage.

[0132] After switching to the second output state, the power supply to the third switch electromagnetic coil L3 is further disconnected. Specifically, after the first end km11 of the first switch is disconnected from the normally closed end Km12 of the first switch, a voltage difference is formed between the first end km11 of the first switch and the normally closed end Km12 of the first switch, so that current passes through the first control switch electromagnetic coil L01, and the first control switch KA1 works, further disconnecting the power supply to the third switch electromagnetic coil L3.

[0133] In the above examples, each example can be combined with each other to form a new example, but the combined example cannot deviate from the concept of the present invention.

Claims

1. A circuit system for a battery-started trailer, characterized in that: Including main circuit and control circuit; The main circuit is composed of at least two groups of batteries and at least three external output terminals connected to electrical appliances; The three external output terminals include: a total output negative terminal X3, a first output positive terminal X1, and a second output positive terminal X2 with a variable voltage; The control circuit switches the main circuit between the first working state and the second working state; The first working state is: two groups of batteries are connected in parallel to form a common negative terminal and a common positive terminal; and the common negative terminal is connected to the total output negative terminal X3, and the common positive terminal is connected to the first output positive terminal X1 and the second output positive terminal X2 respectively; The second working state is: two groups of batteries are connected in series to form a total negative terminal, a total positive terminal, and a middle tap; and the first output positive terminal X1 is connected to the middle tap, the second output positive terminal X2 is connected to the total positive terminal; the total output negative terminal X3 is connected to the total negative terminal.

2. The circuit system of a battery-powered trailer as claimed in claim 1, characterized in that: The two groups of batteries include a first battery GB1 and a second battery GB2; wherein the first battery has a first battery positive terminal gb11 and a first battery negative terminal gb12; the second battery has a second battery positive terminal gb21 and a second battery negative terminal gb22; A first switch KM1 and a third switch KM3 are provided for switching the main circuit between a first working state and a second working state, and the third switch KM3 is a normally open switch; The first battery positive terminal gb11 is connected to the first output positive terminal X1 and the first switch first terminal km11 respectively; the first switch normally closed terminal Km12 is connected to the second output positive terminal X2 and the second battery positive terminal gb21; the first switch normally open terminal Km13 is connected to the second battery negative terminal gb22; Two ends of the third switch KM3 are connected to the first battery negative terminal gb12 and the second battery negative terminal gb22 respectively; The first battery negative terminal gb12 is directly connected to the total output negative terminal X3.

3. The circuit system of a battery-powered trailer as claimed in claim 2, characterized in that: A second switch KM2 is also provided, and the second switch KM2 is a normally open switch; the first battery positive terminal gb11 is connected to the second switch input terminal km21, and the second switch output terminal km22 is respectively connected to the first output positive terminal X1 and the first switch first terminal km11.

4. The circuit system of a battery-powered trailer as claimed in claim 3, characterized in that: A circuit is provided for closing the second switch KM2 through the electrical appliance, specifically: It has an external socket adapted to an electrical appliance and used for pluggable connection of the electrical appliance; the external socket includes a first external socket P1, and the first external socket P1 is connected to the total output negative terminal X3 through the electrical appliance; One end of the second switch electromagnetic coil L2 is connected to the positive terminal of the first battery, and the other end of the second switch electromagnetic coil L2 is connected to the first external socket P1.

5. The circuit system of a battery-powered trailer as claimed in claim 2, characterized in that: The control circuit is used to switch the main circuit between the first working state and the second working state; specifically: Put the main circuit in the first working state: The third switch KM3 is closed to connect the negative terminal gb12 of the first battery with the negative terminal gb22 of the second battery; Connecting the first battery positive terminal gb11 to the first output positive terminal X1; The first switch first terminal km11 and the first switch normally closed terminal Km12 are closed and the first switch normally open terminal Km13 is disconnected, so that the first battery positive terminal gb11 and the second battery positive terminal gb21 are connected; two groups of batteries are connected in parallel; Put the main circuit in the second working state: The third switch KM3 is turned off to cut off the connection between the negative terminal gb12 of the first battery and the negative terminal gb22 of the second battery; The first end km11 of the first switch is closed with the first normally open end Km13 and is disconnected with the first normally closed end Km12 at the same time, so that the positive end gb11 of the first battery is connected with the negative end gb22 of the second battery; two groups of batteries are connected in series.

6. The circuit system of a battery-powered trailer as claimed in claim 5, characterized in that: The control circuit comprises: A circuit for closing and opening the third switch KM3; The circuit for controlling the first switch causes the first end km11 of the first switch to be switched between the first switch normally closed end Km12 and the first switch normally open end Km13; A circuit that links the third switch KM3 and the first switch KM1.

7. The circuit system of a battery-powered trailer as claimed in claim 6, characterized in that: The circuit for closing and opening the third switch KM3 is specifically: The third switch KM3 has a third switch first end km31, a third switch second end km32, and a third switch third end km33. When the third switch is closed, the three ends are connected to each other, and when the third switch is opened, the three ends are disconnected from each other; one end of the third switch electromagnetic coil L3 is connected to the first external socket P1; two ends of the third switch electromagnetic coil L3 are connected to the positive terminal of the first battery; The circuit for controlling the first switch is specifically: One end of the first switch electromagnetic coil L1 is connected to the negative end of the first battery, and the other end of the first switch electromagnetic coil L1 is connected to the positive end of the first battery.

8. The circuit system of a battery-powered trailer as claimed in claim 6, characterized in that: The circuit for linking the third switch KM3 and the first switch KM1 is specifically: (1) A second control switch KA2 is provided for switching the power supply between the third switch electromagnetic coil L3 and the first switch electromagnetic coil L1; Among them, one end of the second control switch KA2 is connected to the positive terminal gb11 of the first battery; the normally closed end of the second control switch KA2 is connected to the second end of the third switch electromagnetic coil L3, and the normally open end of the second control switch KA2 is connected to one end of the first switch electromagnetic coil L1; The external sockets include a second external socket P2 and a third external socket P3. The second external socket P2 is connected to the positive terminal gb11 of the first battery. The electrical appliance can disconnect or connect the second external socket P2 and the third external socket P3. One end of the second control switch electromagnetic coil L02 is connected to the negative terminal of the first battery, and the other end of the second control switch electromagnetic coil L02 is connected to the third external socket P3. (2) The third switch KM3 and the first switch KM1 are interlocked, specifically: A normally closed switch first control switch KA1 is provided between the second end of the third switch electromagnetic coil L3 and the normally closed end of the second control switch KA2; two ends of the first control switch electromagnetic coil L01 are respectively connected to the first switch first end km11 and the first switch normally closed end Km12; A third control switch KA3 is arranged between one end of the first switch electromagnetic coil L1 and the negative end of the first battery, and the third control switch KA3 is a normally closed switch; a circuit is arranged to control the third control switch KA3, specifically: one end of the third control switch electromagnetic coil L03 is connected to the positive end of the first battery, and the second end of the third control switch electromagnetic coil L03 is connected to the third end km33 of the third switch.

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