Power delay device for heavy hydrogen fuel tractor

Abstract

The utility model discloses a heavy type hydrogen fuel tractor power supply time-delay device which comprises a starting storage battery, the output end of the starting storage battery is respectively connected with a key switch, a time-delay module and a relay, and the time-delay module comprises a power supply module and a key interface connected with the key switch. The output end of the key interface is connected with the input end of the first anti-reverse diode, the output end of the first anti-reverse diode is connected with the input end of the power supply module, and the positive electrode interface of the time delay module is connected with the input end of the time delay relay. According to the utility model, the structure is simple, and the first anti-reverse diode and the second anti-reverse diode are added in the time delay module, so that the maximum current on the first anti-reverse diode and the second anti-reverse diode is only the current required by the power supply module regardless of the voltage difference between the positive electrode interface and the key interface of the time delay module; and the current of the output end of the time delay module is only provided by the positive electrode interface of the time delay module, so that the reliability of the power supply module time delay box is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen fuel cell tractor technology, specifically a power delay device for a heavy-duty hydrogen fuel cell tractor. Background Technology

[0002] Currently, most heavy-duty tractor trucks with a capacity of 40 tons or more are powered by internal combustion engines to achieve the vehicle's movement and all hydraulic actions. However, internal combustion engines currently suffer from high fuel consumption and emissions, hindering future technological development. If lithium batteries were used as a power source, the high power requirements of heavy-duty tractor trucks and the limitations of the vehicle's overall layout would result in disadvantages such as short driving range and long charging times.

[0003] Hydrogen energy is a clean energy source, and its byproduct is water. In recent years, with breakthroughs and upgrades in domestic hydrogen fuel cell technology, domestically produced hydrogen fuel cell stacks have achieved mass production capabilities and are gradually being used on a large scale in the industrial vehicle sector. Hydrogen fuel cell vehicles have enormous potential. Hydrogen fuel cell tractors feature zero emissions, short refueling time, and long driving range, and are now being gradually adopted.

[0004] The application of hydrogen energy devices in vehicles differs significantly from the commonly used lithium or lead-acid batteries in terms of electrical systems. Hydrogen fuel systems require a delay in power-off after the vehicle is powered off to purge any remaining water vapor in the pipelines. This prevents water from freezing in the flow channels or gas diffusion layers under low-temperature conditions, which could then block the gas from reaching the catalyst layer to participate in the electrochemical reaction and prevent power generation. To address this, a power delay device for heavy-duty hydrogen fuel cell tractors is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a power delay device for a heavy-duty hydrogen fuel cell tractor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a power delay device for a heavy-duty hydrogen fuel cell tractor, comprising a starter battery, the output terminal of which is connected to a key switch, a delay module, and a relay, respectively. The delay module includes a power module and a key interface connected to the key switch. The output terminal of the key interface is connected to the input terminal of a first anti-reverse diode, the output terminal of the first anti-reverse diode is connected to the input terminal of the power module, the positive terminal of the delay module is connected to the input terminal of the delay relay, and the output terminal of the delay relay is connected to both the output terminal of the delay module and the input terminal of the power module. A second anti-reverse diode is provided between the delay relay and the power module.

[0007] As a further embodiment of this utility model: the negative terminals of the delay module, the relay, the hydrogen fuel cell management module, and the lithium-ion battery management module are connected together and in parallel to the negative terminal of the starting battery.

[0008] As a further embodiment of this utility model: the delay module is further provided with a timer for setting the delay time, and the timer is connected to the delay relay.

[0009] As a further embodiment of this invention: the output terminal of the delay module is connected to the coil terminal of the relay via a conduit.

[0010] As a further embodiment of this invention: the contact terminals of the relay are connected to the hydrogen fuel cell management module and the lithium-ion battery management module.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This application incorporates a first anti-reverse diode and a second anti-reverse diode into the delay module. Regardless of the voltage difference between the positive terminal and the key terminal of the delay module, the maximum current on the first and second anti-reverse diodes is only the current required by the power supply module. The current at the output terminal of the delay module is provided only by the positive terminal of the delay module, thereby improving the reliability of the power supply module delay box. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the power module delay circuit wiring of this utility model;

[0014] Figure 2 This is a schematic diagram of the delay module circuit of this utility model;

[0015] In the diagram: 1. Starter battery; 2. Key switch; 3. Delay module; 4. Relay; 5. Power module; 6. Key interface; 7. First anti-reverse diode; 8. Positive interface; 9. Delay relay; 10. Second anti-reverse diode; 11. Hydrogen fuel cell management module; 12. Lithium-ion battery management module; 13. Timer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-2In this embodiment of the present invention, a power delay device for a heavy-duty hydrogen fuel cell tractor includes a starter battery 1. The output terminal of the starter battery 1 is connected to a key switch 2, a delay module 3, and a relay 4. The output terminal of the delay module 3 is connected to the coil terminal of the relay 4 via a pipeline. The contact terminal of the relay 4 is connected to a hydrogen fuel cell management module 11 and a lithium-ion battery management module 12. The delay module 3 includes a power module 5 and a key interface 6 connected to the key switch 2. The output terminal of the key interface 6 is connected to the input terminal of a first anti-reverse diode 7. The output terminal of the first anti-reverse diode 7 is connected to the input terminal of the power module 5. The positive terminal 8 of the delay module 3 is connected to the input terminal of a delay relay 9. The output terminal of the delay relay 9 is connected to both the output terminal of the delay module 3 and the input terminal of the power module 5. A second anti-reverse diode 10 is provided between the delay relay 9 and the power module 5. The negative terminals of the delay module 3, the relay 4, the hydrogen fuel cell management module 11, and the lithium-ion battery management module 12 are connected together and in parallel to the negative terminal of the starter battery 1.

[0018] Specifically, the starting battery 1 provides low-voltage power to the vehicle; when the key switch 2 is closed, the delay module 3 works, controlling the contacts of the relay 4 to work and provide power to the hydrogen fuel cell management module 11 and the lithium-ion battery management module 12; when the key switch 2 is opened, the delay module 3 continues to work, and at the same time, the timer 13 inside the delay box starts timing. After the set time is reached, the delay module 3 stops outputting, controls the contacts of the relay 4 to de-energize and open, and the hydrogen fuel cell management module 11 and the lithium-ion battery management module 12 are powered down at this time, completing the system delay power-down purging operation. This can prevent the remaining water vapor in the pipeline from freezing under low temperature conditions.

[0019] Please see Figure 1 In one embodiment, preferably, the delay module 3 is further provided with a timer 13 for setting the delay time. The timer 13 is connected to the delay relay 9. The delay time design and principle of the timer 13 are existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0020] The working principle and usage process of this utility model are as follows: When the key switch 2 is turned on, the key interface 6 of the delay module 3 is powered on. At this time, the power supply is provided to the power module 5 through the first anti-reverse diode 7, and the delay relay 9 is simultaneously energized. The power supply to the output terminal of the delay module 3 is provided by the output terminal of the starter battery 1 through the delay relay 9. When the key switch 2 is turned off, the power supply to the power module 5 continues through the delay relay 9 and the second anti-reverse diode 10, while the timer 13 starts timing. After the set time is reached, the delay relay 9 is deactivated, and the output terminal of the delay module 3 will have no output. In addition, during the design of the delay module 3, consideration was taken into account... The voltage drop across the entire vehicle wiring harness is reduced by the addition of the first anti-reverse diode 7 and the second anti-reverse diode 10. Regardless of the voltage difference between the positive terminal 8 of the delay module 3 and the key interface 6 (when the voltage at the positive terminal 8 of the delay module 3 is lower than that at the key interface 6, the second anti-reverse diode 10 does not conduct, and the power module 5 is powered by the key interface 6 of the delay module 3; after the key switch 2 is turned off, the power module 5 is powered by the positive terminal 8 of the delay module 3), the maximum current on the first anti-reverse diode 7 and the second anti-reverse diode 10 is only the current required by the power module 5 (about 20mA), and the current at the output terminal of the delay module 3 is only provided by the output terminal of the starter battery 1.

[0021] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0022] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A power delay device for a heavy-duty hydrogen fuel cell tractor, comprising a starting battery (1), characterized in that, The output terminal of the starting battery (1) is connected to the key switch (2), the delay module (3) and the relay (4) respectively. The delay module (3) includes a power module (5) and a key interface (6) connected to the key switch (2). The output terminal of the key interface (6) is connected to the input terminal of the first anti-reverse diode (7). The output terminal of the first anti-reverse diode (7) is connected to the input terminal of the power module (5). The positive terminal (8) of the delay module (3) is connected to the input terminal of the delay relay (9). The output terminal of the delay relay (9) is connected to the output terminal of the delay module (3) and the input terminal of the power module (5) respectively. A second anti-reverse diode (10) is provided between the delay relay (9) and the power module (5).

2. The power delay device for a heavy-duty hydrogen fuel cell tractor according to claim 1, characterized in that, The negative terminals of the delay module (3), relay (4), hydrogen fuel cell management module (11) and lithium-ion battery management module (12) are connected together and connected in parallel to the negative terminal of the starter battery (1).

3. The power delay device for a heavy-duty hydrogen fuel cell tractor according to claim 1, characterized in that, The delay module (3) is also equipped with a timer (13) for setting the delay time, and the timer (13) is connected to the delay relay (9).

4. The power delay device for a heavy-duty hydrogen fuel cell tractor according to claim 1, characterized in that, The output of the delay module (3) is connected to the coil of the relay (4) via a pipeline.

5. The power delay device for a heavy-duty hydrogen fuel cell tractor according to claim 2, characterized in that, The contact terminals of the relay (4) are connected to the hydrogen fuel cell management module (11) and the lithium-ion battery management module (12).

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