Electric pile response test device, system and test method for variable load working condition

Abstract

The invention relates to an electric pile response test device, system and test method for a variable load working condition, belongs to the technical field of fuel cells, and provides a theoretical basis for better exerting the capacity of an electric pile on a system by simulating the actual variable load working condition of the system and testing the minimum voltage range and the response condition of the electric pile before the electric pile leaves a factory. By investigating the performance of the galvanic pile, the galvanic pile can exert the maximum advantages in an energy system. In the test method, the minimum voltage range of the galvanic pile under the variable load condition of the simulation system working condition and the response condition of the galvanic pile are tested and investigated to obtain a test result, and a control strategy which is more beneficial to galvanic pile operation is provided for the energy system based on the test result.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cells, and in particular relates to a stack response testing device, system and testing method for variable load conditions. Background Art

[0002] The fuel cell stack is the core part of the energy system, responsible for converting chemical energy into electrical energy. The BOP module, as a functional component of the energy system, provides sufficient reactants and suitable operating conditions for the fuel cell stack. Since the fuel cell stack supports the operation of the energy system through stable energy output, the performance of the fuel cell stack has an important impact on the overall performance of the energy system.

[0003] Due to the differences between the testing technologies of the battery stack and the energy system, the factory inspection of the battery stack is carried out on the test bench. After the battery stack is tested and meets the standards, the battery stack is integrated into the system for system-level testing. Due to the differences between the test conditions of the test bench and the actual operating conditions of the energy system, especially under variable load conditions, this difference is more obvious, resulting in the battery stack that meets the factory test standards being difficult to perform at its optimal performance on the energy system. Therefore, a device and method for performing battery stack response testing under variable load conditions is required. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a stack response test device, system and test method for variable load conditions. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0005] The present invention provides a battery stack response test device for variable load conditions, comprising: a power supply module, a power consumption module and a control switch; the power supply module comprises: a battery and a battery stack to be tested; the power consumption module comprises: a load, a BOP module and a heating rod; the control switch comprises: a first switch, a second switch, a third switch, a fourth switch, a fifth switch and a sixth switch; wherein the battery and the battery stack to be tested are connected in parallel, the output end of the battery is connected to the first end of the first switch, and the second end of the first switch is respectively connected to the first ends of the second switch and the third switch; the second end of the second switch is connected to the input end of the load; the second end of the third switch is connected to the first ends of the fourth switch and the fifth switch; the second end of the fourth switch is connected to the input end of the BOP module; the output end of the battery stack to be tested is respectively connected to the second end of the fifth switch and the first end of the sixth switch; the second end of the sixth switch is connected to the input end of the heating rod.

[0006] In one embodiment of the present invention, the battery is used to power the BOP module, the BOP module is used to supply gas to the fuel cell stack to be tested, the fuel cell stack to be tested is used to power the heating rod, and the heating rod is used for the fuel cell stack to be tested.

[0007] In one embodiment of the present invention, when the first switch, the third switch and the fourth switch are closed in sequence, the battery supplies power to the BOP module and the battery stack to be tested stops working.

[0008] In one embodiment of the present invention, when the first switch, the third switch, the fourth switch and the sixth switch are closed in sequence, the battery supplies power to the BOP module, and the battery stack to be tested supplies power to the heating rod.

[0009] In one embodiment of the present invention, when the first switch, the fourth switch, the fifth switch and the sixth switch are closed in sequence, the battery stops working, and the battery stack to be tested supplies power to the BOP module and the heating rod.

[0010] In one embodiment of the present invention, when the second switch, the third switch, the fifth switch and the sixth switch are closed in sequence, the battery stops working, and the battery stack to be tested supplies power to the load and the heating rod.

[0011] The present invention also provides a battery stack response test system for variable load conditions, a test bench and the above-mentioned battery stack response test device for variable load conditions.

[0012] The present invention also provides a method for testing the response of a stack under variable load conditions, comprising the steps of:

[0013] Step 1: Connect the battery stack to be tested to a battery stack response test device for variable load conditions;

[0014] Step 2: Set up several test conditions respectively, each test condition is used to simulate an actual variable load condition on the energy system;

[0015] Step 3: Test the working condition of the battery stack to be tested under several test conditions respectively, obtain test results, and complete the battery stack response test for variable load conditions.

[0016] In one embodiment of the present invention, the test conditions include: startup condition, idle condition, loading preparation condition and temperature operation condition.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The stack response test device for variable load conditions of the present invention simulates the actual variable load conditions of the system, tests the minimum voltage range and the response of the stack before the stack leaves the factory, and provides a theoretical basis for the stack to better exert its capabilities in the system. By examining the performance of the stack, it is beneficial for the stack to exert its greatest advantages in the energy system.

[0019] The stack response test method for variable load conditions of the present invention examines the minimum voltage range of the stack and the response of the stack under variable load conditions that simulate system conditions to obtain test results. Based on the test results, a control strategy that is more conducive to the operation of the stack is provided for the energy system.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a stack response test device for variable load conditions provided by an embodiment of the present invention;

[0022] Figure 2 It is a flow chart of a method for testing a stack response under variable load conditions provided by an embodiment of the present invention.

[0023] Icons: 1-battery; 2-load; 3-BOP module; 4-heating rod; 5-first switch; 6-second switch; 7-third switch; 8-fourth switch; 9-fifth switch; 10-sixth switch; 100-battery stack to be tested. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of a stack response test device, system and test method for variable load conditions proposed in accordance with the present invention, in combination with the accompanying drawings and specific implementation methods.

[0025] The above and other technical contents, features and effects of the present invention are clearly presented in the following detailed description of the specific implementation modes in conjunction with the accompanying drawings. Through the description of the specific implementation modes, the technical means and effects adopted by the present invention to achieve the predetermined purpose can be more deeply and specifically understood. However, the attached drawings are only for reference and explanation purposes and are not used to limit the technical solutions of the present invention.

[0026] Embodiment 1

[0027] Since there are obvious differences in the operating conditions of the fuel cell stack under the test conditions on the test bench and the actual variable load conditions, even the fuel cell stack that meets the factory test standards may have difficulty in achieving its optimal performance in the energy system. In view of this, a first aspect of this embodiment provides a fuel cell stack response test device for variable load conditions.

[0028] like Figure 1 As shown, the stack response test device for variable load conditions of the present invention includes: a stack response test device for variable load conditions, including: a power supply module, a power consumption module and a control switch.

[0029] In this embodiment, the power supply module includes: a battery 1 and a battery stack 100 to be tested; the power consumption module includes: a load 2, a BOP module 3 and a heating rod 4; the control switch includes: a first switch 5, a second switch 6, a third switch 7, a fourth switch 8, a fifth switch 9 and a sixth switch 10.

[0030] Specifically, the battery 1 and the battery stack 100 to be tested are connected in parallel, the output end of the battery 1 is connected to the first end of the first switch 5, and the second end of the first switch 5 is respectively connected to the first ends of the second switch 6 and the third switch 7; the second end of the second switch 6 is connected to the input end of the load 2; the second end of the third switch 7 is connected to the first ends of the fourth switch 8 and the fifth switch 9; the second end of the fourth switch 8 is connected to the input end of the BOP module 3; the output end of the battery stack 100 to be tested is respectively connected to the second end of the fifth switch 9 and the first end of the sixth switch 10; the second end of the sixth switch 10 is connected to the input end of the heating rod 4.

[0031] In this embodiment, the battery 1 is used to supply power to the BOP module 3 , the BOP module 3 is used to supply gas to the battery stack 100 to be tested, the battery stack 100 to be tested is used to supply power to the heating rod 4 , and the heating rod 4 is used for the battery stack 100 to be tested.

[0032] In order to simulate the actual variable load condition of the system, through the selective opening and closing of the control switch, a variety of working condition control paths including: starting condition, idling condition, loading preparation condition and temperature operation condition are formed. Please refer to Figure 1 and Table 1. Each operating condition is described below.

[0033] Table 1 Device loading logic table

[0034]

[0035] Under the startup condition, when the first switch 5, the third switch 7 and the fourth switch 8 are closed in sequence, the battery 1 supplies power to the BOP module 3, and the battery stack 100 to be tested stops working. In actual circumstances, no response test is performed on the battery stack 100 to be tested under this condition.

[0036] Under idle conditions, when the first switch 5 , the third switch 7 , the fourth switch 8 and the sixth switch 10 are closed in sequence, the battery 1 supplies power to the BOP module 3 , the BOP module 3 supplies gas to the battery stack 100 to be tested, and the battery stack 100 to be tested supplies power to the heating rod 4 .

[0037] For example, the power consumption of the heating rod 4 is 2kw, and the idle condition is used to simulate the normal temperature start condition of the battery stack 100 to be tested, and the loading power is increased from 0 to 2kw. When the battery stack 100 to be tested is started at normal temperature, power is directly supplied to the heating rod 4. After loading 2kw, the voltage of the battery stack 100 to be tested decreases rapidly. The performance of the battery stack 100 to be tested is verified by measuring whether the lowest value of the voltage is within an acceptable range.

[0038] In the loading preparation condition, when the first switch 5 , the fourth switch 8 , the fifth switch 9 and the sixth switch 10 are closed in sequence, the battery 1 stops working, and the battery stack 100 to be tested supplies power to the BOP module 3 and the heating rod 4 at the same time.

[0039] Exemplarily, the loading preparation condition is used to simulate the normal temperature starting condition of the battery stack 100 to be tested, and the loading power is increased from 2 kW to 4 kW. The performance of the battery stack 100 to be tested is verified by measuring whether the reaction speed and the minimum value of the voltage are within an acceptable range.

[0040] Since temperature will also affect the performance of the battery stack 100 to be tested, three temperature operating conditions are examined below.

[0041] Under normal operating conditions at 25°C, when the second switch 6 , the third switch 7 , the fifth switch 9 and the sixth switch 10 are closed in sequence, the battery 1 stops working, and the battery stack 100 to be tested supplies power to the load 2 and the heating rod 4 .

[0042] For example, the power of load 2 is 6kw, the water temperature is 25°C, and the loading power is increased from 4kw to 6kw. The battery stack 100 to be tested is examined under the temperature operating condition, and the performance of the battery stack 100 to be tested is verified by measuring whether the desired output power can be achieved.

[0043] Under the operating condition of 45°C, when the second switch 6 , the third switch 7 , the fifth switch 9 and the sixth switch 10 are closed in sequence, the battery 1 stops working, and the battery stack 100 to be tested supplies power to the load 2 and the heating rod 4 .

[0044] For example, the power of load 2 is 6kw, the water temperature is 45°C, and the loading power is increased from 4kw to 8kw. The battery stack 100 to be tested is examined under the temperature operating condition, and the performance of the battery stack 100 to be tested is verified by measuring whether the desired output power can be achieved.

[0045] Under the operating condition of 65° C., when the second switch 6 , the third switch 7 , the fifth switch 9 and the sixth switch 10 are closed in sequence, the battery 1 stops working, and the battery stack 100 to be tested supplies power to the load 2 and the heating rod 4 .

[0046] For example, the power of load 2 is 6kw, the water temperature is 60°C, and the loading power is increased from 4kw to 8kw. The battery stack 100 to be tested is examined under the temperature operating condition, and the performance of the battery stack 100 to be tested is verified by measuring whether the desired output power can be achieved.

[0047] The principle is to simulate the response of the battery stack 100 to be tested under the system variable load condition, simulate the actual operating condition of the battery stack 100 to be tested on the system, and set multiple verification conditions and conditions, such as standby state, power-on state, idle speed, loading preparation and adjustable loading conditions. When several conditions are switched between each other, the gas flow required by the battery stack 100 to be tested and the load it is subjected to will change to varying degrees, and whether the temperature can be raised to the temperature point that the battery stack is most suitable for in time will also cause the response state of the battery stack 100 to be tested to change accordingly.

[0048] The stack response test device for variable load conditions of the present invention simulates the actual variable load conditions of the system, tests the minimum voltage range and the response of the stack before the stack leaves the factory, provides a theoretical basis for the stack to better exert its capabilities in the system, and by examining the performance of the stack, it is conducive to the stack to exert the greatest advantage in the energy system. Therefore, the stack response test device for variable load conditions of the present invention can be widely promoted in the field of fuel cell technology.

[0049] The second aspect of this embodiment provides a fuel cell response test system for variable load conditions, which mainly uses a test bench to provide performance support for the simulation system. Based on the fuel cell response test device for variable load conditions provided by the first aspect, the actual operating conditions of the system are simulated to examine the fuel cell performance, so as to help the fuel cell to maximize its advantages in the system.

[0050] In a third aspect of the present embodiment, a method for testing a stack response under a variable load condition is provided, which may use the stack response testing device for a variable load condition provided by the first aspect of the present embodiment or the stack response testing system for a variable load condition provided by the second aspect of the present embodiment, and includes the following steps:

[0051] Step 1: Connect the battery stack to be tested to a battery stack response test device for variable load conditions;

[0052] Step 2: Set up several test conditions respectively, each test condition is used to simulate an actual variable load condition on the energy system;

[0053] Step 3: Test the working condition of the battery stack to be tested under several test conditions respectively, obtain the test results, and complete the battery stack response test for variable load conditions.

[0054] In an optional embodiment, the test conditions include: startup condition, idle condition, loading preparation condition and temperature operation condition.

[0055] The stack response test method for variable load conditions of the present invention examines the minimum voltage range of the stack and the response of the stack under variable load conditions that simulate system conditions to obtain test results. Based on the test results, a control strategy that is more conducive to the operation of the stack is provided for the energy system.

[0056] It should be noted that this test method solves the problem of battery stack testing based on a test bench by simulating various actual operating conditions of the battery stack on the energy system. For technical details not disclosed in the test method embodiment of the present invention, please refer to the description of the device embodiment for understanding.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant is intended to cover non-exclusive inclusion, so that the article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or device including the elements. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The orientation or position relationship indicated by "up", "down", "left", "right", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is 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 a limitation of the present invention.

[0058] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A stack response test device for variable load conditions, characterized in that: include: Power supply module, power consumption module and control switch; The power supply module comprises: a storage battery (1) and a battery stack (100) to be tested; The power consumption module comprises: a load (2), a BOP module (3) and a heating rod (4); The control switch comprises: a first switch (5), a second switch (6), a third switch (7), a fourth switch (8), a fifth switch (9) and a sixth switch (10); The storage battery (1) and the battery stack (100) to be tested are connected in parallel, the output end of the storage battery (1) is connected to the first end of the first switch (5), and the second end of the first switch (5) is respectively connected to the first ends of the second switch (6) and the third switch (7); The second end of the second switch (6) is connected to the input end of the load (2); the second end of the third switch (7) is connected to the first ends of the fourth switch (8) and the fifth switch (9); The second end of the fourth switch (8) is connected to the input end of the BOP module (3); The output end of the battery stack (100) to be tested is respectively connected to the second end of the fifth switch (9) and the first end of the sixth switch (10); The second end of the sixth switch (10) is connected to the input end of the heating rod (4).

2. The stack response test device for variable load conditions according to claim 1, characterized in that: The storage battery (1) is used to supply power to the BOP module (3); the BOP module (3) is used to supply gas to the battery stack (100) to be tested; the battery stack (100) to be tested is used to supply power to the heating rod (4); and the heating rod (4) is used for the battery stack (100) to be tested.

3. The stack response test device for variable load conditions according to claim 1, characterized in that: When the first switch (5), the third switch (7) and the fourth switch (8) are closed in sequence, the storage battery (1) supplies power to the BOP module (3), and the battery stack (100) to be tested stops working.

4. The stack response test device for variable load conditions according to claim 1, characterized in that: When the first switch (5), the third switch (7), the fourth switch (8) and the sixth switch (10) are closed in sequence, the storage battery (1) supplies power to the BOP module (3), and the battery stack (100) to be tested supplies power to the heating rod (4).

5. The stack response test device for variable load conditions according to claim 1, characterized in that: When the first switch (5), the fourth switch (8), the fifth switch (9) and the sixth switch (10) are closed in sequence, the battery (1) stops working, and the battery stack (100) to be tested supplies power to the BOP module (3) and the heating rod (4).

6. The stack response test device for variable load conditions according to claim 1, characterized in that: When the second switch (6), the third switch (7), the fifth switch (9) and the sixth switch (10) are closed in sequence, the battery (1) stops working, and the battery stack (100) to be tested supplies power to the load (2) and the heating rod (4).

7. A stack response test system for variable load conditions, characterized in that: include: A test bench and a stack response test device for variable load conditions as described in any one of claims 1 to 6.

8. A method for testing the response of a stack under variable load conditions, characterized in that: Includes steps: Step 1: Connect the battery stack to be tested to a battery stack response test device for variable load conditions; Step 2: Set up several test conditions respectively, each test condition is used to simulate an actual variable load condition on the energy system; Step 3: Test the working condition of the battery stack to be tested under several test conditions respectively, obtain test results, and complete the battery stack response test for variable load conditions.

9. The method for testing the stack response under variable load conditions according to claim 8, characterized in that: The test conditions include: startup condition, idling condition, loading preparation condition and temperature operation condition.

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