Controller and fuel cell engine

Abstract

The utility model relates to the technical field of fuel cells, and discloses a controller and a fuel cell engine, the controller comprises a shell, a positive pole copper bar, a shunt and a control module, the positive pole copper bar, the shunt and the control module are all installed in the shell, the bottom of the shell is provided with a heat dissipation waterway, the shunt is installed at the bottom of the shell, and the positive pole copper bar is connected with the shunt. The utility model has the beneficial effects that the shunt is arranged in the controller, the idle space in the controller can be effectively utilized, the requirement on the arrangement space in the fuel cell engine box body is reduced, and the anode copper bar in the controller is shorter, so that the fixing strength of the shunt can be increased during installation, and the reliability of the controller is improved. And meanwhile, the heat dissipation water path in the shell can effectively cool the flow divider, the detection accuracy is improved, the whole controller is high in integration degree and high in reliability, and the product competitiveness of the fuel cell engine applying the controller can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a controller and a fuel cell engine. Background Art

[0002] In order to detect the water distribution inside the stack and the humidity of the membrane electrode after purging, the fuel cell engine usually adopts the EIS impedance detection scheme, but the EIS function requires the use of a "shunt" component. The common shunt is arranged in the box and connected in series with the positive or negative electrode of the copper busbar. However, this arrangement has the following problems: 1. The shunt is large in size and the arrangement space in the box is small. The shunt is difficult to arrange in the box, and the strength of the shunt core resistor is low. In addition to the copper busbar connection, a fixed bracket connection is required; 2. The temperature inside the box is high, which is not conducive to the heat dissipation of the shunt. Excessive shunt temperature will lead to inaccurate measurement accuracy; 3. The humidity inside the box is high, and the shunt is bare copper. A certain creepage distance needs to be maintained between the box and the box to avoid insulation failure, which will increase the volume of the box. Utility Model Content

[0003] The purpose of this application is to provide a controller and a fuel cell engine to improve the integration and reliability of the fuel cell engine.

[0004] The purpose of this application is achieved through the following technical solutions:

[0005] A controller comprises: a shell, a positive copper busbar, a shunt and a control module, wherein the positive copper busbar, the shunt and the control module are all installed inside the shell, a heat dissipation water path is provided at the bottom of the shell, the shunt is installed at the bottom of the shell, and the positive copper busbar is connected to the shunt.

[0006] In some embodiments of the present application, a support seat is further included, and the diverter is installed on the support seat.

[0007] In some embodiments of the present application, the support seat includes a support and an enclosure, the enclosure is arranged around the outer periphery of the support and together with the support defines an installation space for installing a diverter, and the diverter is installed on the support.

[0008] In some embodiments of the present application, a current sensor is further included, and the current sensor is installed on the positive copper bus.

[0009] In some embodiments of the present application, the sampling line of the diverter is arranged outside the shell.

[0010] In some embodiments of the present application, the control module includes a DCDC buck-boost power supply module.

[0011] In some embodiments of the present application, the control module includes a DCL low-voltage output module.

[0012] In some embodiments of the present application, the control module includes an ACC air compressor controller module.

[0013] In some embodiments of the present application, an insulation detector is further included. The insulation detector is disposed close to the shunt and is used to detect the insulation condition between the shunt and the shell.

[0014] A fuel cell engine comprises the controller as described above.

[0015] Compared with the conventional structure in which the diverter is installed in the housing, the controller and fuel cell engine of the present application have a larger internal space of the controller. The diverter is integrated into the controller, which can effectively utilize the idle space in the controller and reduce the layout space requirements inside the fuel cell engine housing. In addition, since the positive copper busbar inside the controller is shorter, the fixing strength of the diverter can be increased during installation, thereby avoiding the problem of low installation strength caused by the long length of the positive copper busbar when the diverter is installed, and forming a cantilever structure. At the same time, since the shell is provided with a heat dissipation water path, it can be effectively utilized to control the body temperature of the diverter, thereby avoiding the impact of excessive diverter temperature on sampling accuracy. The entire controller has high integration and strong reliability, which can effectively enhance the product competitiveness of the fuel cell engine using the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a circuit diagram of the fuel cell engine of the present application;

[0017] Figure 2 It is a schematic diagram of the installation position of the diverter of the present application;

[0018] Figure 3 It is a schematic diagram of the overall structure of the controller of the present application;

[0019] Figure 4 It is a schematic diagram of the installation structure of the diverter of the present application;

[0020] Figure 5 It is a structural schematic diagram of the support base of the present application.

[0021] In the figure, 1. shell; 2. positive copper busbar; 3. shunt; 4. control module; 5. support base; 51. support; 52. enclosure; 6. current sensor. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. used in the present application to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1-5 As shown, the first aspect of an embodiment of the present application proposes a controller, comprising: a shell 1, a positive copper busbar 2, a shunt 3 and a control module 4, wherein the positive copper busbar 2, the shunt 3 and the control module 4 are all installed inside the shell 1, a heat dissipation water path is opened at the bottom of the shell 1, the shunt 3 is installed at the bottom of the shell 1, and the positive copper busbar 2 is connected to the shunt 3.

[0026] Based on the above technical solution, the controller of the present application has a larger internal space than the conventional structure in which the shunt 3 is installed in the box. The shunt 3 is integrated into the controller, which can effectively utilize the idle space in the controller and reduce the layout space requirements inside the fuel cell engine box. In addition, since the positive copper bar 2 inside the controller is relatively short, the fixing strength of the shunt 3 can be increased during installation to avoid the problem of low installation strength caused by the long length of the positive copper bar 2 when the shunt 3 is installed, and the shunt 3 is not installed. The heat dissipation water path can be effectively used to control the body temperature of the shunt 3 to avoid the shunt 3 temperature being too high and affecting the sampling accuracy. The whole controller has high integration and reliability, and can effectively improve the product competitiveness of the fuel cell engine using the controller. It should be noted that the shunt 3 is actually a resistor with a very small resistance. Its principle is to calculate the current flowing through by measuring the voltage drop of the shunt 3 when the current flows through it. During the use of the fuel cell system, DC power is supplied to DCDC, and the shunt 3 is connected to the positive electrode of DCDC. During operation, the DC current flows from the positive electrode of the stack module through the main input positive electrode of DCDC and then through the shunt 3, and then output to the external load module through the main output positive electrode of DCDC. At this time, when the fuel cell system controller sends an impedance detection instruction, DCDC will send a reverse AC power from the positive electrode. This AC power passes through the shunt 3, and then through the main output of the stack module to the single-chip battery of the stack, causing voltage fluctuations in the single-chip battery. The voltage fluctuation value is detected by the inspection module, and the resistance of the single-chip battery is calculated in combination with the current value measured by the shunt 3. Finally, the water content inside the single-chip battery is judged by the resistance value. When in use, the shunt 3 is connected in series to the main input positive electrode, the main input positive electrode is connected to the positive electrode of the battery stack module, and then connected to one side of the shunt 3, and the other side of the shunt 3 is connected to the other end of the positive electrode: battery stack positive electrode-main input positive electrode-shunt 3-main input positive electrode, which is equivalent to dividing the main input positive copper bus 2 into two sections, and then connecting a shunt 3 in series in the middle.

[0027] In some embodiments of the present application, Figure 3-5 As shown, it also includes a support base 5, and the diverter 3 is installed on the support base 5. The support base 5 serves as a mounting carrier for the diverter 3. Compared with directly mounting the diverter 3 on the housing 1, this mounting form is more stable and reliable.

[0028] Specifically, Figure 4 , 5As shown, the support seat 5 includes a support 51 and a fence 52. The fence 52 is arranged around the outer periphery of the support 51 and defines together with the support 51 an installation space for installing the diverter 3. The diverter 3 is installed on the support 51. The support seat 5 structure is composed of a support 51 for installation and a fence 52 for isolation. The shape of the support 51 is combined with the structure of the diverter 3, and is set to a concave structure with high sides and low middle, which can better install the diverter 3. The fence 52 is arranged around the support 51, so that a relatively closed space is formed above the support 51, which has a good isolation effect and can effectively protect the diverter 3 on the support 51.

[0029] In some embodiments of the present application, Figure 3-5 As shown, it also includes a current sensor 6, which is installed on the positive copper busbar 2. The current sensor 6 can measure the current at the positive copper busbar 2 and feed back the detected data to the fuel cell engine to monitor the position of the positive copper busbar 2 of the controller to avoid accidents.

[0030] In some embodiments of the present application, Figure 3 As shown, the sampling line of the diverter 3 is arranged outside the housing 1. By leading out the sampling line and placing the diverter 3 interface outside the housing 1, it is convenient to connect to the CVM for sampling.

[0031] In some embodiments of the present application, Figure 3 As shown, the control module 4 includes a DCDC step-up / step-down power supply module. DCDC is a DC-to-DC converter, also known as a DC-DC converter, which is a circuit or electromechanical device for converting electric energy, and can convert a DC power supply into a DC power supply of different voltages. Its power range can be from very small to very large. Applying it to a fuel cell engine can well adapt to the corresponding usage scenarios and achieve a good power supply effect.

[0032] In some embodiments of the present application, Figure 3 As shown, the control module 4 includes a DCL low-voltage output module. The DCL low-voltage output module is used to output low-voltage direct current, which can supply power to other devices that require low-voltage direct current.

[0033] In some embodiments of the present application, Figure 3 As shown, the control module 4 includes an ACC air compressor controller module. The ACC air compressor controller module is used to control the air compressor.

[0034] In some embodiments of the present application, an insulation detector is further included, which is arranged near the shunt 3 and is used to detect the insulation condition between the shunt 3 and the housing 1. Since the shunt 3 is bare copper, which is a conductive material, and the housing 1 also has conductive properties, in order to avoid safety problems caused by the conduction between the two, an insulation detector needs to be arranged to detect the insulation condition between the shunt 3 and the housing 1 to improve safety.

[0035] A fuel cell engine includes the controller as described above. The fuel cell engine including the controller has all the beneficial effects of the controller, which will not be described in detail here.

[0036] In summary, compared with the conventional structure in which the diverter 3 is installed in the box, the controller and the fuel cell engine of the present application have a larger internal space of the controller. The diverter 3 is integrated into the controller, which can effectively utilize the idle space in the controller and reduce the layout space requirement inside the fuel cell engine box. In addition, since the positive copper bus 2 inside the controller is relatively short, the fixing strength of the diverter 3 can be increased during installation, thereby avoiding the problem of low installation strength caused by the long length of the positive copper bus 2 when the diverter 3 is installed, and forming a cantilever structure. At the same time, since the shell 1 is provided with a heat dissipation water path, it can be effectively utilized to control the body temperature of the diverter 3, thereby avoiding the diverter 3 temperature being too high and affecting the sampling accuracy. The entire controller has high integration and strong reliability, which can effectively enhance the product competitiveness of the fuel cell engine using the controller.

[0037] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A controller, characterized in that: include: A shell, a positive copper busbar, a shunt and a control module, wherein the positive copper busbar, the shunt and the control module are all installed inside the shell, a heat dissipation water path is provided at the bottom of the shell, the shunt is installed at the bottom of the shell, and the positive copper busbar is connected to the shunt.

2. The controller according to claim 1, characterized in that: It also includes a support base, and the diverter is installed on the support base.

3. The controller according to claim 2, characterized in that: The support seat includes a support and a baffle, wherein the baffle is arranged around the outer circumference of the support and defines together with the support an installation space for installing a diverter, and the diverter is installed on the support.

4. The controller according to claim 1, characterized in that: It also includes a current sensor, which is installed on the positive copper busbar.

5. The controller according to claim 1, characterized in that: The sampling line of the flow divider is arranged outside the shell.

6. The controller according to claim 1, characterized in that: The control module includes a DCDC buck-boost power supply module.

7. The controller according to claim 1, characterized in that: The control module includes a DCL low voltage output module.

8. The controller according to claim 1, characterized in that: The control module includes an ACC air compressor controller module.

9. The controller according to claim 1, characterized in that: It also includes an insulation detector, which is arranged close to the shunt and is used to detect the insulation condition between the shunt and the shell.

10. A fuel cell engine, characterized in that: Comprising a controller as described in any one of claims 1-9.

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