CN213124508U

CN213124508U - Fuel cell electrical control system

Info

Publication number: CN213124508U
Application number: CN202021699246.XU
Authority: CN
Inventors: 郭彪; 徐昊; 王锦; 张洋; 陶少龙; 李小龙; 谷军
Original assignee: Henan Yuqing Power Co ltd
Current assignee: Henan Yuqing Power Co ltd
Priority date: 2020-08-15
Filing date: 2020-08-15
Publication date: 2021-05-04
Anticipated expiration: 2030-08-15

Abstract

The utility model provides a fuel cell electrical control system, including first relay and second relay, the auxiliary contact of first relay and the auxiliary contact parallel connection of second relay, the coil of first relay and the coil parallel connection of second relay, fuel cell's positive pole is connected with first connector through first relay and second relay; the negative electrode of the fuel cell is connected to the second connector. The utility model discloses an optimize electrical control, can increase the security that overcurrent ability also can guarantee the system, development system that simultaneously can be quick reduces the cost of spare part.

Description

Fuel cell electrical control system

Technical Field

The utility model relates to a fuel cell system technical field especially relates to a fuel cell electrical control system.

Background

The output voltage of the fuel cell stack is in inverse proportion to the current, the higher the power, the lower the voltage, and the higher the current, the fuel cell system gradually develops towards the direction of high power and high current. However, the existing relays and connecting parts are more commonly used for high voltage and low current, and fewer relays and connectors are available for high current on the fuel cell. And the relay with small current is used in a large-current environment, so that the relay is easy to be adhered to cause that the electric pile cannot be protected under the extreme condition that the load cannot be disconnected. The existing mass connectors are not suitable for the high-current environment of the fuel cell, and the cost and the long period are not beneficial to the existing product development and application if newly developed components are needed.

SUMMERY OF THE UTILITY MODEL

In view of this, aim at solving prior art's problem, the utility model provides a fuel cell electrical control system realizes increasing the working life and the break-make ability of relay when the heavy current passes through parallelly connected relay.

The utility model adopts the following technical scheme:

the utility model provides a fuel cell electrical control system, including first relay and second relay, the auxiliary contact of first relay and the auxiliary contact parallel connection of second relay, the coil of first relay and the coil parallel connection of second relay, fuel cell's positive pole is connected with first connector through first relay and second relay; the negative electrode of the fuel cell is connected to the second connector.

Preferably, the auxiliary contact of the first relay and the auxiliary contact of the second relay are both connected with the second copper plate.

Preferably, the first relay and the second relay are connected with the anode of the fuel cell through a first copper plate.

Preferably, the negative electrode of the fuel cell is connected to the second connector via a third copper plate.

Preferably, the connector is a 2PIN connector.

The utility model has the advantages that:

the utility model discloses a fuel cell electrical control system, it can increase overcurrent ability and the control pile break-make of external output power that can be safe to connect in parallel through current ripe batch relay. The control mode of the relay is that two relay coils are connected in parallel for control. The relay adhesion state can be monitored in real time through the monitoring of the auxiliary contact of the relay, so that the risk caused by the out-of-control of the relay is effectively avoided; the application of the connector adopts the single pole which is used for outputting by the existing 2PIN connector, namely, the overcurrent capacity is increased, the wire diameter of the output single cable is reduced, the installation is convenient, and the arranged bending radius is reduced. The problem of uneven current distribution can be effectively avoided by adding the parallel points at the shortest connecting position.

The utility model discloses based on the characteristic of fuel cell output and combine the product in batches on the market to optimize and use, through optimizing electrical control, monitor relay state, the application of parallel connection connector and relay both can increase the security that overcurrent ability also can guarantee the system, development system that simultaneously can be quick and reduce the cost of spare part.

The utility model is used for the control of fuel cell pile output and the protection to the pile, the application through optimizing relay and connector makes the system can compatible too big electric current's needs. The system mainly controls the output of the galvanic pile through the on-off of the relay, and can emergently disconnect the relay when the galvanic pile is monitored to have a fault, so that the aim of protecting the galvanic pile is fulfilled. Through optimizing the female arranging of relay front and back end, the application of optimizing the connector makes the pile can pass through the needs of heavy current, makes the relay can more steady operation in the control of relay and the optimization of monitoring mode, can be quick when the relay goes wrong monitor the trouble.

Drawings

Fig. 1 is a schematic circuit diagram of an electrical control system for a fuel cell according to the present invention.

In the figure: 1-auxiliary contact, 2-auxiliary contact, 3-coil, 4-coil, 5-first bronze medal, 6-second bronze medal, 7-third bronze medal, 8-first connector, 9-second connector.

Detailed Description

As shown in fig. 1, the utility model provides a fuel cell electrical control system, including first relay and second relay, the auxiliary contact 1 of first relay and the auxiliary contact 2 parallel connection of second relay, auxiliary contact 1 and auxiliary contact 2 all are connected with second bronze medal 6. The coil 3 of the first relay is connected with the coil 4 of the second relay in parallel, and the anode of the fuel cell is connected with the first connector 8 through the first relay and the second relay; the negative pole of the fuel cell is connected to a second connector 9 via a third copper plate 7. The first relay and the second relay are connected with the anode of the fuel cell through a first copper plate 5.

In this embodiment, the connector is a 2PIN connector.

The utility model discloses use parallelly connected relay and connector to pass through the heavy current, application auxiliary contact monitoring relay state, and the optimal control method reaches relay synchronous control, optimizes the pile inner structure and makes the electric current balanced. The coil control of the relays which need to be connected in parallel uses the same power supply and control to ensure that the actuation of the relays is at the same time. The auxiliary contact needs to detect the state through the controller, and whether the state of the control coil is consistent with the state of the auxiliary contact is detected for detecting the fault of the relay. The front end and the rear end of the parallel relay need to be connected in parallel at the nearest distance point to reduce the resistance value of the branch bus. The single wire diameter of the output wire can be reduced by connecting the single pole of the galvanic pile with a 95-square 2PIN connector, so that the single wire diameter is convenient for external connection, and the 2PIN connector needs to be additionally provided with iron blocks outside two connection points at the socket end for parallel connection; meanwhile, the 2pin connector is used for the positive electrode and the negative electrode, and the fool-proof design can be realized through different key positions of the connector.

The relay is an intermediate stage of electrical connection and disconnection between the galvanic pile and the outside, and the direct current relay has the risk of adhesion in operation, so the adhesion detection function of the relay is required to be added in use. The electric conduction output by the fuel cell stack is electrically connected with the outside through the relay, the relay can be disconnected to protect the outside or the stack under extreme conditions, and the state of the relay can be judged by using a new adhesion detection method to prevent the relay from being adhered to cause out of control. Due to the limited overcurrent capacity of a single relay, the development cost of the current reducing relay can be increased by using a parallel connection method. The utilization is gone on the 2PIN connector that the new forms of energy operation is ripe and is carried out the pile and external connection and can reduce the cost and save development cycle.

The utility model discloses link to each other between the output of fuel cell galvanic pile and load and ally oneself with the break-make that the relay can control the output electricity, can increase the electric current that passes through when normal operating, can break off the external connection protection galvanic pile under extreme condition. The coil control and the power supply of the relay are connected in parallel, so that the coil attraction interval time can be avoided, and the two relays are prevented from being different in overcurrent due to different closing time.

When the controller controls the relay coil to be attracted, the main contact and the auxiliary contact of the relay are closed simultaneously, and when the control coil is not attracted, the main contact and the auxiliary contact of the relay are opened simultaneously. The controller is when not controlling coil actuation instruction, and whether the controller can detect auxiliary contact and close, if the controller does not close the coil, the auxiliary contact closure explains that there is the adhesion problem in the relay, needs to change the relay this moment, prevents that unable disconnection when pile and load need break off.

The utility model discloses a 2PIN connector is chooseed for use to the connector for the single-stage output of fuel cell pile is parallelly connected together with the copper tablet in the 2PIN junctions of connector, can reduce the problem of parallelly connected female unbalanced current that arranges. The front contact and the rear contact of the relay which are connected in parallel are connected by the copper plate, so that the problem of unbalanced current of the busbar is reduced.

The utility model discloses a fuel cell electrical control system can increase the working life and the break-make ability of relay when the heavy current passes through parallelly connected relay, and the coil that connects in parallel through the control can less relay with open with the time difference of closing, prevents the inconsistent problem of electric current. Whether the auxiliary contact monitoring through the relay compares with the coil state can detect the relay and glue, monitoring relay health status that can be quick accurate prevents that the relay trouble from leading to failing to let pile and load disconnection. By using a 2PIN connector for one pole, the output connections for the fuel cell anode and cathode can increase over-current capability while reducing the wire diameter of the individual power wires.

Control of the output of the fuel cell stack and protection of the stack, by optimizing the application of relays and connectors, enables the system to be compatible with the need for excessive current. The system mainly controls the output of the galvanic pile through the on-off of the relay, and can emergently disconnect the relay when the galvanic pile is monitored to have a fault, so that the aim of protecting the galvanic pile is fulfilled. By optimizing the busbar at the front end and the rear end of the relay, the application of the optimized connector enables the galvanic pile to pass the requirement of large current, the relay can run more stably by optimizing the control method and the monitoring method of the relay, and faults can be rapidly monitored when the relay goes wrong.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A fuel cell electrical control system, characterized by: the fuel cell system comprises a first relay and a second relay, wherein an auxiliary contact (1) of the first relay is connected with an auxiliary contact (2) of the second relay in parallel, a coil (3) of the first relay is connected with a coil (4) of the second relay in parallel, and the anode of the fuel cell is connected with a first connector (8) through the first relay and the second relay; the negative electrode of the fuel cell is connected to a second connector (9).

2. A fuel cell electrical control system as claimed in claim 1, wherein: and the auxiliary contact (1) of the first relay and the auxiliary contact (2) of the second relay are both connected with the second copper plate (6).

3. A fuel cell electrical control system as claimed in claim 2, wherein: the first relay and the second relay are connected with the anode of the fuel cell through a first copper plate (5).

4. A fuel cell electrical control system as claimed in claim 3, wherein: the cathode of the fuel cell is connected with a second connector (9) through a third copper plate (7).

5. A fuel cell electrical control system as claimed in claim 4, wherein: the connector is a 2PIN connector.