A variable voltage power supply system for an in-vehicle electrical device
By using a transformer power supply system for vehicle-mounted electrical equipment, and utilizing a multi-voltage switching matrix and a power-on/off matrix switch, flexible switching between 12V and 24V voltages is achieved. This solves the problem of a single voltage for vehicle-mounted electrical equipment testing, improves safety, and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIFU INTELLIGENT SENSE (WUXI) TECH CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-10
AI Technical Summary
Existing vehicle-mounted electrical equipment testing vehicles have a single output voltage, which cannot simultaneously meet the needs of multiple different working voltages, resulting in inflexible voltage switching and potential safety hazards.
The transformer power supply system consists of a vehicle battery, overload protector, main junction box, transformer, transformer junction box, multi-voltage switching matrix switch and on/off matrix switch. It achieves flexible switching between 12V and 24V voltage and on/off control of equipment through single-pole double-throw and single-pole single-throw switches.
It achieves high efficiency in voltage switching, reduces the number of connecting harnesses, improves safety, and reduces costs.
Smart Images
Figure CN224481502U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power supply technology, and more specifically, to a transformer power supply system for vehicle-mounted electrical equipment. Background Technology
[0002] During the research and development testing phase, vehicle-mounted electrical equipment needs to be installed on test vehicles and undergo extensive real-world road testing to ensure its suitability. This equipment is used in both passenger and commercial vehicles. Passenger vehicles typically have a 12V output voltage, while commercial vehicles have a 24V output voltage. Therefore, the power supply voltage for the vehicle-mounted electrical equipment under test is either 12V or 24V.
[0003] The following problems exist in the current vehicle-mounted electrical equipment testing vehicles:
[0004] The test vehicle outputs either 12V or 24V. When multiple on-board electrical devices with different operating voltages are working simultaneously, the test vehicle needs to output both 12V and 24V power supply voltages. A single output voltage cannot meet these requirements simultaneously. Typically, an on-board inverter and adapter are used to change the output voltage of the test vehicle to meet the different power supply voltage requirements of the on-board electrical devices (12V or 24V). However, this solution has drawbacks such as inflexible switching between multiple power supply voltages, numerous power supply harnesses, and potential safety hazards. Summary of the Invention
[0005] This utility model provides a transformer power supply system for vehicle-mounted electrical equipment to solve the problems of inflexible switching between multiple power supply voltages, numerous power supply harnesses, and potential safety hazards in the prior art.
[0006] As a first aspect of this utility model, a transformer power supply system for vehicle-mounted electrical equipment is provided. The transformer power supply system for vehicle-mounted electrical equipment includes a vehicle battery, an overload protector, a main junction box, a transformer, a transformer junction box, a multi-voltage switching matrix switch, and an on / off matrix switch. The vehicle battery is electrically connected to the main junction box through the overload protector. The main junction box is electrically connected to the transformer and the multi-voltage switching matrix switch respectively. The transformer is electrically connected to the multi-voltage switching matrix switch through the transformer junction box. The multi-voltage switching matrix switch is electrically connected to the vehicle-mounted electrical equipment through the on / off matrix switch.
[0007] Furthermore, the positive terminal of the vehicle battery is connected to the positive input terminal of the main junction box via the overload protector, and the negative terminal of the vehicle battery is connected to the negative input terminal of the main junction box. When not performing testing, the overload protector is disconnected to prevent leakage.
[0008] Furthermore, the positive and negative output pins of the main junction box are connected to the input harness of the transformer, and the output harness of the transformer is connected to the positive and negative input terminals of the transformer junction box.
[0009] Furthermore, the positive output pin of the main junction box is connected to the input terminal of the multi-voltage switching matrix switch, and the negative output pin of the main junction box is connected to the negative terminal of each vehicle-mounted electrical device; the positive output pin of the transformer junction box is connected to the input terminal of the multi-voltage switching matrix switch, and the negative output pin of the transformer junction box is connected to the negative terminal of each vehicle-mounted electrical device; wherein, each output circuit of the main junction box and the transformer junction box is connected to a separate fuse to achieve protection for each output circuit; wherein, the main junction box and the transformer junction box output 12V power supply voltage and 24V power supply voltage, respectively.
[0010] Furthermore, the multi-voltage switching matrix switch includes multiple single-pole double-throw (SPDT) switches. Each SPDT switch can realize two switching on states and one off state. Each SPDT switch includes two input pins and one output pin. The two input pins of each SPDT switch are respectively connected to the positive output pin of the main junction box and the positive output pin of the transformer junction box. The output pin of each SPDT switch is connected to the input terminal of the on / off matrix switch. By controlling each SPDT switch, the switching between 12V and 24V power supply voltages is realized.
[0011] Furthermore, the power-on / off matrix switch includes multiple single-pole single-throw switches, each of which can realize circuit switching. Each single-pole single-throw switch has an input pin and an output pin. The input pin of each single-pole single-throw switch is connected to the output pin of each single-pole double-throw switch in the multi-voltage switching matrix switch, and the output pin of each single-pole single-throw switch is connected to the positive terminal of each vehicle-mounted electrical device to individually control the power-on / off of each vehicle-mounted electrical device.
[0012] The transformer power supply system for vehicle-mounted electrical equipment provided by this utility model has the following advantages: it is easy to use, has high efficiency in voltage switching, low cost, reduces wiring harnesses, and improves safety. Attached Figure Description
[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof.
[0014] Figure 1 A schematic diagram of the transformer power supply system for vehicle-mounted electrical equipment provided by this utility model.
[0015] Figure 2 This is a schematic diagram of the structure of the multi-voltage switching matrix switch provided by this utility model.
[0016] Figure 3 This is a schematic diagram of the on / off matrix switch provided by this utility model. Detailed Implementation
[0017] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the transformer power supply system for vehicle-mounted electrical equipment proposed according to this utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.
[0018] This embodiment provides a transformer power supply system for vehicle-mounted electrical equipment, such as... Figure 1 As shown, the transformer power supply system for the vehicle-mounted electrical equipment includes a vehicle battery, an overload protector, a main junction box, a transformer, a transformer junction box, a multi-voltage switching matrix switch, and an on / off matrix switch. The vehicle battery is electrically connected to the main junction box through the overload protector. The main junction box is electrically connected to both the transformer and the multi-voltage switching matrix switch. The transformer is electrically connected to the multi-voltage switching matrix switch through the transformer junction box. The multi-voltage switching matrix switch is electrically connected to the vehicle-mounted electrical equipment through the on / off matrix switch.
[0019] Preferably, the positive terminal of the vehicle battery is connected to the positive input terminal of the main junction box via the overload protector, and the negative terminal of the vehicle battery is connected to the negative input terminal of the main junction box. When not performing testing, the overload protector is disconnected to prevent leakage.
[0020] Preferably, the positive and negative output pins of the main junction box are connected to the input harness of the transformer, and the output harness of the transformer is connected to the positive and negative input terminals of the transformer junction box. The transformer is capable of converting 12V power supply voltage to other power supply voltages, such as 24V power supply voltage; or converting 24V power supply voltage to other power supply voltages, such as 12V power supply voltage.
[0021] Preferably, the positive output pin of the main junction box is connected to the input terminal of the multi-voltage switching matrix switch, and the negative output pin of the main junction box is connected to the negative terminal of each vehicle-mounted electrical device; the positive output pin of the transformer junction box is connected to the input terminal of the multi-voltage switching matrix switch, and the negative output pin of the transformer junction box is connected to the negative terminal of each vehicle-mounted electrical device; wherein, each output circuit of the main junction box and the transformer junction box is connected through a separate fuse to achieve protection for each output circuit, thus the transformer can achieve overcurrent protection through the fuse; wherein, the main junction box and the transformer junction box output 12V supply voltage and 24V supply voltage respectively.
[0022] Preferably, such as Figure 2 As shown, the multi-voltage switching matrix switch includes multiple single-pole double-throw (SPDT) switches. Each SPDT switch can achieve two switching on states and one off state. Each SPDT switch includes two input pins and one output pin. The two input pins of each SPDT switch are respectively connected to the positive output pin of the main junction box and the positive output pin of the transformer junction box. The output pin of each SPDT switch is connected to the input terminal of the on / off matrix switch. By controlling each SPDT switch, the switching between 12V and 24V power supply voltages is realized.
[0023] Preferably, such as Figure 3 As shown, the power-on / off matrix switch includes multiple single-pole single-throw switches, each of which can realize circuit switching. Each single-pole single-throw switch has an input pin and an output pin. The input pin of each single-pole single-throw switch is connected to the output pin of each single-pole double-throw switch in the multi-voltage switching matrix switch. The output pin of each single-pole single-throw switch is connected to the positive terminal of each vehicle-mounted electrical device to individually control the power-on / off of each vehicle-mounted electrical device.
[0024] The working principle of the transformer power supply system for vehicle-mounted electrical equipment provided by this utility model is as follows: The vehicle battery serves as the power source for the entire transformer power supply system, providing electrical energy to the vehicle-mounted electrical equipment; the overload protector can be manually switched on and off. When the transformer power supply system is in use, the overload protector needs to be manually connected to achieve circuit conduction. If the current in the circuit exceeds the protection range of the overload protector, it will automatically disconnect the circuit, thereby achieving circuit protection. When the transformer power supply system is not in use, the overload protector needs to be manually disconnected to prevent the vehicle battery from running out of power; the main distribution box is used to split one of the main power supply branches into multiple branches, which supply power to the vehicle-mounted electrical equipment respectively. Another branch of the main power supply is connected to the transformer, which converts 1 / 2 of the vehicle battery's current into 1 / 2 of the power supply. The 2V voltage is boosted to 24V, 48V, or other voltages, and then connected to the transformer junction box. The principle of this transformer junction box is the same as that of the main junction box. The multi-voltage switching matrix switch connects multiple circuits branched from the main junction box and multiple circuits branched from the transformer junction box through multiple single-pole double-throw switches. The single-pole double-throw switches enable the selection of three switching states: 12V, 24V (or 48V, or other voltages), and open circuit. The on / off matrix switch controls the power supply of multiple vehicle-mounted electrical devices through multiple single-pole single-throw switches. Each single-pole single-throw switch has two states: on and off circuit. The multiple vehicle-mounted electrical devices include sensors under test (cameras, radar, etc.) and test equipment (monitors, industrial computers, inverters), etc.
[0025] This utility model provides a transformer power supply system for vehicle-mounted electrical equipment, which is convenient to use, has efficient voltage switching, low cost, reduces wiring harnesses, and improves safety.
[0026] This utility model embodiment also provides a car, including the transformer power supply system for vehicle-mounted electrical equipment described in the above embodiment, and therefore has the beneficial effects of the transformer power supply system for vehicle-mounted electrical equipment, which will not be repeated here.
[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A transformer power supply system for vehicle-mounted electrical equipment, characterized in that, The transformer power supply system for the vehicle-mounted electrical equipment includes a vehicle battery, an overload protector, a main junction box, a transformer, a transformer junction box, a multi-voltage switching matrix switch, and an on / off matrix switch. The vehicle battery is electrically connected to the main junction box through the overload protector. The main junction box is electrically connected to both the transformer and the multi-voltage switching matrix switch. The transformer is electrically connected to the multi-voltage switching matrix switch through the transformer junction box. The multi-voltage switching matrix switch is electrically connected to the vehicle-mounted electrical equipment through the on / off matrix switch.
2. The transformer power supply system for vehicle-mounted electrical equipment according to claim 1, characterized in that, The positive terminal of the vehicle battery is connected to the positive input terminal of the main junction box via the overload protector, and the negative terminal of the vehicle battery is connected to the negative input terminal of the main junction box. When not performing testing, the overload protector is disconnected to prevent leakage.
3. The transformer power supply system for vehicle-mounted electrical equipment according to claim 1, characterized in that, The positive and negative output pins of the main junction box are connected to the input harness of the transformer, and the output harness of the transformer is connected to the positive and negative input terminals of the transformer junction box.
4. The transformer power supply system for vehicle-mounted electrical equipment according to claim 1, characterized in that, The positive output pin of the main junction box is connected to the input terminal of the multi-voltage switching matrix switch, and the negative output pin of the main junction box is connected to the negative terminal of each vehicle-mounted electrical device. The positive output pin of the transformer junction box is connected to the input terminal of the multi-voltage switching matrix switch, and the negative output pin of the transformer junction box is connected to the negative terminal of each vehicle-mounted electrical device. Each output circuit of the main junction box and the transformer junction box is protected by a separate fuse. The main junction box and the transformer junction box output 12V and 24V power supply voltages, respectively.
5. The transformer power supply system for vehicle-mounted electrical equipment according to claim 4, characterized in that, The multi-voltage switching matrix switch includes multiple single-pole double-throw (SPDT) switches. Each SPDT switch can achieve two on / off states and one off state. Each SPDT switch includes two input pins and one output pin. The two input pins of each SPDT switch are respectively connected to the positive output pin of the main junction box and the positive output pin of the transformer junction box. The output pin of each SPDT switch is connected to the input terminal of the on / off matrix switch. By controlling each SPDT switch, the switching between 12V and 24V power supply voltages is realized.
6. The transformer power supply system for vehicle-mounted electrical equipment according to claim 5, characterized in that, The power-on / off matrix switch includes multiple single-pole single-throw switches, each of which can realize circuit switching. Each single-pole single-throw switch has an input pin and an output pin. The input pin of each single-pole single-throw switch is connected to the output pin of each single-pole double-throw switch in the multi-voltage switching matrix switch. The output pin of each single-pole single-throw switch is connected to the positive terminal of each vehicle-mounted electrical device to individually control the power on / off of each vehicle-mounted electrical device.