Electricity supplementing device of static vehicle

Abstract

An electricity supplement device of a static vehicle relates to the technical field of vehicle power supply, is used for being connected to a low-voltage circuit of a vehicle, and comprises at least one solar module and a voltage transformation module, the solar module is arranged on an automobile body of the automobile; the solar assembly comprises a plurality of solar cell panels which are connected in parallel. Each solar cell panel comprises a plurality of crystalline silicon solar cell pieces which are connected in series. One end of the voltage transformation assembly is electrically connected with the solar assembly, and the other end is electrically connected with a low-voltage circuit. The crystalline silicon solar cell piece converts light energy into electric energy, and the solar assembly transmits the electric energy collected by the solar cell panel to the voltage transformation assembly for voltage transformation and supplies the electric energy to a low-voltage circuit of the automobile. The voltage transformation assembly adopts a BOOST circuit design, adopts an integrated circuit to drive a power switch tube, and is provided with an isolation diode element at an output part, the isolation diode element is isolated from low-voltage current, the current can only be output in a single way, and a low-voltage circuit is not influenced. And an avalanche diode is arranged at a related pin to prevent static electricity from damaging the circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle power supply, in particular to an electric supplement device for a static vehicle. Background Art

[0002] Vehicles are equipped with batteries and low-voltage circuits to maintain the low-voltage power demand of various parts of the vehicle. When the vehicle is not used for a long time, the battery will discharge itself. In addition, due to the static current (static current refers to the current when there is no signal input, that is, the current consumed by the device itself without being affected by external factors), the battery power will continue to be consumed. When the battery power is insufficient, the entire vehicle will not be able to start. The initial parking time of the vehicle is about one to two months, and the phenomenon of failure to start will occur. As the battery ages and other reasons, this time will gradually shorten, causing many inconveniences to the owner. Therefore, in the prior art, a new solution is urgently needed to solve the above problems. Utility Model Content

[0003] The utility model is used to solve the problem of electric energy consumed by static current of the whole vehicle and self-discharge of the battery, so that the battery is in a healthy state when the vehicle is parked for a long time.

[0004] An electric supplement device for a stationary vehicle, used to access a low-voltage circuit of the vehicle, comprising at least one solar module and a transformer module;

[0005] The solar energy component is arranged on the body of the automobile;

[0006] The solar module comprises a plurality of parallel-connected solar panels, each of which comprises a plurality of series-connected crystalline silicon solar cells;

[0007] One end of the transformer component is electrically connected to the solar component, and the other end is electrically connected to the low-voltage circuit.

[0008] The transformer assembly includes a boost circuit, which is used to increase the output voltage of the solar assembly to be suitable for connecting to the low-voltage circuit.

[0009] The boost circuit includes a boost driving circuit and a bootstrap capacitor which are electrically connected.

[0010] At least one energy storage capacitor is arranged between the boost circuit and the low voltage circuit.

[0011] The transformer assembly further includes a first isolation diode, an anode of the first isolation diode is electrically connected to the boost circuit, and a cathode of the first isolation diode is electrically connected to the energy storage capacitor.

[0012] It also includes a second isolation diode, wherein the anode of the second isolation diode is electrically connected to the transformer component, and the cathode of the second isolation diode is electrically connected to the low-voltage circuit.

[0013] A fuse is arranged between the second isolation diode and the low voltage circuit.

[0014] There are multiple solar modules, and the multiple solar modules are connected in parallel.

[0015] The transformer assembly is provided with an avalanche diode for electrostatic protection.

[0016] The transformer assembly includes a power switch tube, and the power switch tube is used to control the connection and disconnection between the transformer assembly and the low-voltage circuit.

[0017] The low voltage circuit includes a battery, and the output voltage of the transformer assembly is greater than the rated voltage of the battery.

[0018] The utility model has the following beneficial effects: the crystalline silicon solar cell of the utility model converts light energy into electrical energy, and the solar module transmits the electrical energy collected by the solar panel to the transformer module for transformation, and supplies it to the low-voltage circuit of the car. The transformer module adopts the BOOST boost circuit design, uses an integrated circuit to drive the power switch tube, and sets an isolation diode element at the output part to isolate the low-voltage current. The current can only be output in one direction without affecting the low-voltage circuit. Avalanche diodes are set at the relevant pins to prevent static electricity from damaging the circuit. A welding fuse is set to protect the output line. The output voltage of the transformer module is greater than the rated voltage of the battery. In this way, when the car is in a static state, the transformer module can not only supply static current to the electrical appliances on the car, but also replenish the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 The utility model is a schematic structural diagram of an electric supplement device for a static vehicle.

[0021] Figure 2 The utility model is a schematic diagram of a transformer assembly of an electric supplement device for a static vehicle.

[0022] Figure 3 A schematic diagram of a solar panel assembly of an electric supplement device for a static vehicle according to the utility model.

[0023] The reference numerals in the figures indicate:

[0024] 1- Low voltage circuit;

[0025] 2-solar modules, 21-solar panels, 211-crystalline silicon solar cells;

[0026] 3- transformer assembly, 31- boost circuit, 311- Boost drive circuit;

[0027] C1-bootstrap capacitor, C2-energy storage capacitor, D1-first isolation diode, D2-second isolation diode, D3-avalanche diode, N-power switch, F-fuse. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] An electric supplement device for a stationary vehicle, such as Figure 1-Figure 3 As shown, a low-voltage circuit 1 for accessing a car includes at least one solar module 2 and a transformer module 3;

[0030] The solar panel 2 is arranged on the body of the car;

[0031] The solar module 2 includes a plurality of parallel-connected solar panels 21, and each solar panel 21 includes a plurality of series-connected crystalline silicon solar cells 211;

[0032] One end of the transformer component 3 is electrically connected to the solar component 2 , and the other end is electrically connected to the low voltage circuit 1 .

[0033] The utility model is to supplement the static current and current self-discharge loss of the vehicle when it is turned off and parked, so the power required is small, and the solar cell, panel and assembly used are very small in size, and can be arranged on the upper surface of the dashboard, the upper surface of the coat rack, the back of the sun visor (the sun visor is lowered when parking) and other sunny places according to the general layout requirements. The crystalline silicon solar cell 211 converts light energy into electrical energy, and the solar module 2 transmits the electrical energy collected by the solar panel 21 to the transformer module 3 for transformation, and supplies it to the low-voltage circuit 1 of the car.

[0034] In some embodiments, the transformer assembly 3 includes a boost circuit 31, which is used to increase the output voltage of the solar assembly 2 to be suitable for connecting to the low-voltage circuit. The boost circuit 31 can be used to achieve power supplement with fewer crystalline silicon solar cells 211, and the demand can be met by simply increasing the output voltage of the solar assembly.

[0035] In some embodiments, the boost circuit 31 includes a boost driving circuit 311 and a bootstrap capacitor C1 that are electrically connected. The boost driving circuit 311 and the bootstrap capacitor C1 cooperate to complete the boosting operation with fewer components.

[0036] In some embodiments, at least one energy storage capacitor C2 is provided between the boost circuit 31 and the low voltage circuit 1. The energy storage capacitor C2 can store electrical energy and release the electrical energy to the low voltage circuit 1 when the voltage of the low voltage circuit 1 is too low.

[0037] In some embodiments, the transformer assembly 3 further includes a first isolation diode D1, wherein the anode of the first isolation diode D1 is electrically connected to the boost circuit 31, and the cathode of the first isolation diode D1 is electrically connected to the energy storage capacitor C2. The first isolation diode D1 utilizes the unidirectional conduction principle of the diode to isolate the conduction of the voltage, thereby preventing the electric energy of the energy storage capacitor C2 from being released to the boost circuit 31.

[0038] In some embodiments, a second isolation diode D2 is further included, wherein the anode of the second isolation diode D2 is electrically connected to the transformer component 3, and the cathode of the second isolation diode D2 is electrically connected to the low-voltage circuit 1. The second isolation diode D2 also utilizes the unidirectional conduction principle of the diode to isolate the conduction of the voltage, thereby preventing the electric energy of the low-voltage circuit 1 from being released to the transformer component 3.

[0039] In some embodiments, a fuse F is provided between the second isolation diode D2 and the low-voltage circuit 1. When the voltage input to the low-voltage circuit 1 increases abnormally, the fuse F will be disconnected, disconnecting the circuit and thus protecting the low-voltage circuit 1.

[0040] In some embodiments, there are multiple solar modules 2, and the multiple solar modules 2 are connected in parallel. Each solar module 2 can be set at a different position of the vehicle and supply power to the low-voltage circuit 1 at the same time.

[0041] In some embodiments, an avalanche diode D3 for electrostatic protection is provided in the transformer assembly 3. As shown in the figure, four avalanche diodes D3 simultaneously play the role of overvoltage protection and voltage stabilization in the circuit.

[0042] In some embodiments, the transformer assembly 3 includes a power switch tube N, which is used to control the connection and disconnection between the transformer assembly 2 and the low voltage circuit 1. The power switch tube N is a triode, which has good saturation conduction and cutoff characteristics and can be used as an electronic switch. Specifically, it can be electrically connected to the boost chip in the Boost drive circuit and receive the electrical signal of the boost chip to complete the connection and disconnection action.

[0043] In some embodiments, the low voltage circuit includes a battery, and the output voltage of the transformer assembly 3 is greater than the rated voltage of the battery. Thus, when the vehicle is in a static state, the transformer assembly 3 can not only supply static current to the electrical appliances on the vehicle, but also replenish the battery.

[0044] Example

[0045] The battery voltage of the automobile low-voltage circuit in this embodiment is 12V, the static current is 0.02A, and the static power is 12V*0.02A=0.24W. 2 The power of each single crystalline silicon solar cell 211 is 0.08W, the voltage of the single crystalline silicon solar cell 211 is 0.5V, and each solar panel 31 is composed of 10 solar cells in series, with a voltage of 5V and a power of 0.8W. Each solar module 2 includes three solar panels 31 connected in parallel, so the voltage is 5V and the power is 2.4W. This embodiment uses a solar device composed of four solar modules 2 connected in parallel, so the output voltage is 5V and the power is 9.6W.

[0046] The transformer component 3 in this embodiment adopts a conversion efficiency of 96%. The transformer component 3 adopts a boost drive circuit 311 and a bootstrap capacitor C1 to boost the voltage. The output voltage after boosting is set to 14V, and the output power is 9.6W*96%=9.216W.

[0047] 9.216W / 0.24W=38.4 Therefore, 1 hour of illumination can maintain static power loss for about 38 hours. Because the output voltage 14V of the transformer component 3 is greater than the voltage 12V of the low-voltage circuit 1, the transformer component 3 can replenish the battery when the car is parked.

[0048] The crystalline silicon solar cell 211 used in this embodiment is very small and can be arranged on the upper surface of the dashboard, the upper surface of the coat rack, the back of the sun visor (when the sun visor is lowered when parking), and other sunny places according to the general layout requirements. The specific number of solar modules 2 can be determined according to actual applications.

[0049] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An electric supplement device for a stationary vehicle, used to connect to the low-voltage circuit of the vehicle, characterized in that: comprising at least one solar module and a transformer module; The solar energy component is arranged on the body of the automobile; The solar module comprises a plurality of parallel-connected solar panels, each of which comprises a plurality of series-connected crystalline silicon solar cells; One end of the transformer component is electrically connected to the solar component, and the other end is electrically connected to the low-voltage circuit.

2. The electric supplement device for a static vehicle according to claim 1, characterized in that: The transformer assembly includes a boost circuit, which is used to increase the output voltage of the solar assembly to be suitable for connecting to the low-voltage circuit.

3. The electric supplement device for a static vehicle according to claim 2, characterized in that: The boost circuit includes a boost driving circuit and a bootstrap capacitor which are electrically connected.

4. The electric supplement device for a static vehicle according to claim 2, characterized in that: At least one energy storage capacitor is arranged between the boost circuit and the low voltage circuit.

5. The electric supplement device for a static vehicle according to claim 4, characterized in that: The transformer assembly further includes a first isolation diode, an anode of the first isolation diode is electrically connected to the boost circuit, and a cathode of the first isolation diode is electrically connected to the energy storage capacitor.

6. The electric supplement device for a static vehicle according to claim 1, characterized in that: It also includes a second isolation diode, wherein the anode of the second isolation diode is electrically connected to the transformer component, and the cathode of the second isolation diode is electrically connected to the low-voltage circuit.

7. The electric supplement device for a static vehicle according to claim 6, characterized in that: A fuse is arranged between the second isolation diode and the low voltage circuit.

8. The electric supplement device for a static vehicle according to claim 1, characterized in that: There are multiple solar modules, and the multiple solar modules are connected in parallel.

9. The electric supplement device for a static vehicle according to claim 1, characterized in that: The transformer assembly is provided with an avalanche diode for electrostatic protection.

10. The electric supplement device for a static vehicle according to claim 1, characterized in that: The transformer assembly includes a power switch tube, and the power switch tube is used to control the connection and disconnection between the transformer assembly and the low-voltage circuit.

11. The electric supplement device for a static vehicle according to claim 1, characterized in that: The low voltage circuit includes a battery, and the output voltage of the transformer assembly is greater than the rated voltage of the battery.

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