A method for simulating and verifying lightning strikes on aluminum electrolytic capacitors for fast charging

Abstract

The present invention relates to a method for lightning strike simulation verification of an aluminum electrolytic capacitor monomer for fast charging, step one: applying a lightning strike surge voltage V1 to the fast charger device. Step two: using a detection device to detect the maximum surge voltage value V2 that the two ends of the capacitor monomer on the fast charger device can actually withstand. Step three: using a simulation test tool to apply a stepped simulated lightning strike surge voltage V3 to the capacitor monomer to be tested. Step four: detecting the voltage across the capacitor monomer to be tested in the simulation test tool until the voltage reaches the maximum lightning strike surge voltage V2 value of the capacitor monomer, and using the simulated lightning strike surge voltage V3 value actually applied by the simulation test tool at this time as the capacitor monomer reference test voltage V4. Step five: using a simulation test tool to apply a capacitor monomer reference test voltage V4 to the capacitor monomer to be tested, and those that fail are judged as unqualified products that do not meet the lightning strike voltage. Through a simple simulation test of the lightning strike resistance of a single capacitor, the lightning strike resistance of the fast charger equipment can be accurately evaluated.

Description

Technical Field

[0001] The invention belongs to the field of capacitors, and in particular to a method for lightning strike simulation verification of a single aluminum electrolytic capacitor for fast charging. Background Art

[0002] The capacitor is composed of anode foil, electrolytic paper, cathode foil and electrolyte. When voltage is applied between the two plates of the capacitor, the capacitor will store charge. The capacitor mainly plays the role of coupling, bypassing, filtering, rectification, energy storage, tuning and so on in the circuit. There are several capacitors installed in the internal circuit board of the fast charger device. When the fast charger device is working, the two ends of the capacitor are subjected to a certain voltage. When the instantaneous voltage exceeds the capacitor's voltage resistance value, the capacitor will be broken down and fail. According to the product quality safety and performance requirements, the fast charger device must have a certain lightning surge voltage resistance capability, and the product must be able to withstand the required maximum lightning surge voltage resistance. Therefore, it is necessary to conduct lightning strike tests on the whole fast charger device before leaving the factory. There are many influencing factors, which cannot reflect the lightning surge resistance of the capacitor more truly and intuitively. The existing lightning strike test method for the whole fast charger device cannot pre-implement equivalent lightning strike resistance tests on the capacitor monomer separately, resulting in a lag in capacitor development and improvement, which cannot be carried out simultaneously with the development of the charger device, delaying the launch of new fast charger devices. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for simulating and verifying lightning strikes on aluminum electrolytic capacitor cells for fast charging, so as to accurately evaluate the lightning strike resistance of fast charger equipment through a simple lightning strike resistance simulation test of capacitor cells.

[0004] The present invention solves the technical problem by adopting the following technical solutions:

[0005] A method for lightning strike simulation verification of a single aluminum electrolytic capacitor for fast charging, characterized in that it comprises the following steps:

[0006] Step 1: According to the lightning surge voltage V1 required by the fast charger design, apply a lightning surge voltage V1 to the voltage input terminal of the fast charger device;

[0007] Step 2: Use a detection device to detect the maximum surge voltage value that the two ends of the capacitor monomer on the fast charger device can actually withstand, and obtain the maximum lightning surge voltage V2 of the capacitor monomer;

[0008] Step 3: Install the capacitor to be tested into the simulation test fixture, and use the simulation test fixture to apply a stepped simulated lightning surge voltage V3 to the capacitor to be tested;

[0009] Step 4: Use the detection equipment to detect the voltage across the capacitor monomer to be tested in step 3, until the voltage across the capacitor monomer to be tested reaches the maximum lightning surge voltage V2 value of the capacitor monomer, record the simulated lightning surge voltage V3 value actually applied by the simulation test tool at this time, and use the voltage value of the simulated lightning surge voltage V3 as the capacitor monomer reference test voltage V4;

[0010] Step 5: Install the capacitor to be tested into the simulation test tooling, and use the simulation test tooling to apply the capacitor reference test voltage V4 value in step 4 to the capacitor to be tested. The capacitor that can withstand the application of the capacitor reference test voltage V4 without failure is a qualified capacitor that meets the requirements for lightning surge resistance.

[0011] Furthermore, the detection device is an oscilloscope.

[0012] Furthermore, the step-type simulated lightning surge voltage V3 is an adjustable input voltage, and its step increment value is 0.1KV to 1KV in a cyclic increment.

[0013] Furthermore, the capacitor monomer is one of a pin-shaped capacitor, a bolt-shaped capacitor, a horn-shaped capacitor, and a chip capacitor.

[0014] Furthermore, the simulation test tooling includes a power supply V, a lightning simulator, a charging current limiting resistor R1, a fuse F1, an AC-DC converter, a capacitor to be tested, and a discharge resistor R3; the lightning simulator is connected to the power supply V, the power supply V is connected to the charging current limiting resistor R1 and the fuse F1, the current limiting resistor R1 and the fuse F1 are respectively connected to the AC-DC converter, the AC-DC converter is connected to both ends of the capacitor to be tested, and the capacitor to be tested is connected to the discharge resistor R3.

[0015] The advantages and positive effects of the present invention are:

[0016] The present invention provides a method for lightning strike simulation verification of aluminum electrolytic capacitor monomers for fast charging. The above-mentioned technical solution is adopted. Through the simulation verification method of the simulation test tool, the lightning surge resistance of the fast charger equipment can be simulated quickly, efficiently and accurately. Most capacitor specifications are verified by lightning strike verification of the fast charger equipment as a whole, which confirms the accuracy of the capacitor monomer simulation test. The data of the simulation verification of the simulation test tool is highly close to the data of the verification of the assembled fast charger equipment, and the verification result reaches 99.6% consistency.

[0017] The lightning protection characteristics of complex charger equipment are simplified through equivalent simulation, and the reliability of the lightning protection characteristics of the charger equipment is accurately evaluated through a simple and single equivalent simulation test of the lightning protection characteristics of the capacitor, so as to achieve the effect of whole-machine verification by capacitor single-unit verification, and realize a simple, efficient and accurate evaluation of the lightning protection characteristics of fast charger equipment. It solves the problem that the existing lightning protection test method for the whole fast charger equipment cannot pre-implement equivalent lightning protection tests on capacitor single-units. It realizes the synchronous development of capacitors and fast charger equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a flow chart of the lightning strike simulation verification test of the present invention.

[0020] Figure 2 It is a circuit diagram of the simulation test tooling of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the embodiment of the present invention, in combination with the appendage, the simulation test tooling includes a power supply V, a lightning simulator, a charging current limiting resistor R1, a fuse F1, an AC-DC converter, a capacitor to be tested, and a discharge resistor R3; the lightning simulator is connected to the power supply V, the power supply V is connected to the charging current limiting resistor R1 and the fuse F1, the current limiting resistor R1 and the fuse F1 are respectively connected to the AC-DC converter, the AC-DC converter is connected to both ends of the capacitor to be tested, and the capacitor to be tested is connected to the discharge resistor R3. The capacitor monomer is an aluminum electrolytic capacitor monomer. The capacitor monomer is one of a pin-shaped capacitor, a bolt-shaped capacitor, a horn-shaped capacitor, and a chip capacitor.

[0023] The simulation test fixture is a simple working circuit built by simulating the whole machine circuit principle of the fast charger equipment. Through simple simulation testing of capacitor monomers, the effect of whole machine verification can be achieved by verifying capacitor monomers. In the simple working circuit of the simulation test fixture, R1 simulates the equivalent resistance in series of the whole machine input circuit of the fast charger equipment, and the F1 fuse simulates the whole machine fuse to protect the circuit from overcurrent. The D1~D4 full-bridge rectifier simulates the AC-DC conversion of the whole machine, the Cx capacitor monomer under test simulates the filter capacitor in the whole machine circuit of the fast charger equipment to smooth the circuit voltage, and R3 simulates the whole machine workload of the fast charger equipment to ensure that the capacitor monomer is in a dynamic working process during the test.

[0024] The working principle of the simple capacitor monomer is that the normal working voltage is superimposed on the lightning surge voltage and then passes through the current limiting resistor R1 and then through the full-bridge rectifier to become a pulsating DC voltage, and then passes through the Cx tested capacitor monomer to become a relatively stable DC voltage for the simulated load R3 to work. The simple working circuit of the entire simulation test tool replaces the complex whole machine circuit of the fast charger equipment, that is, the whole machine circuit of the equivalent simulation fast charger equipment, and the effect of whole machine verification can be achieved by simply simulating the capacitor monomer verification.

[0025] The embodiments of the present invention are further described in detail with reference to the accompanying drawings:

[0026] Step 1: According to the lightning surge voltage V1 required by the fast charger design, apply a lightning surge voltage V1 to the voltage input terminal of the fast charger.

[0027] Specifically, the fast charger device can be a fast charging power source, a charging device, and an electrical device, etc. The fast charger device of this embodiment is a fast charging power source. The fast charging power source design manufacturer applies the lightning surge voltage specified in the design to perform a lightning strike test on the fast charger device based on its own design scheme including the selection of lightning strike protection components such as MOV / NTC / aluminum electrolytic capacitor specifications.

[0028] Step 2: Use a detection device to detect the maximum surge voltage value that the two ends of the capacitor monomer on the fast charger device can actually withstand, and obtain the maximum lightning surge voltage V2 of the capacitor monomer.

[0029] Specifically, while applying the lightning surge voltage V1 to the whole fast charger device, a detection device is used to detect the maximum surge voltage value that can actually be borne by both ends of the capacitor monomer in the circuit board of the fast charger device. The detection device is an oscilloscope, which records the voltage actually borne by both ends of the capacitor monomer, and records it as the maximum lightning surge voltage V2 of the capacitor monomer. When the whole fast charger device is subjected to the lightning surge voltage V1, the lightning surge voltage actually borne by the capacitor monomer in the whole fast charger device is voltage V2. Because other components of the whole fast charger device consume part of the voltage, the voltage value of V1 at this time is greater than the voltage value of V2.

[0030] Step 3: Install the capacitor to be tested into the simulation test fixture, and use the simulation test fixture to apply a step-by-step simulated lightning surge voltage V3 to the capacitor to be tested. The step-by-step simulated lightning surge voltage V3 is an adjustable input voltage, and its step increment value is 0.1KV to 1KV in a cyclic increment.

[0031] Specifically, the capacitor to be tested is one of a pin-shaped capacitor, a bolt-shaped capacitor, a horn-shaped capacitor, and a chip capacitor. The capacitor to be tested is installed in a simulation test tool, and the simulation test tool includes a power supply V, a lightning strike simulator, a charging current limiting resistor R1, a fuse F1, an AC-DC converter, a capacitor to be tested, and a discharge resistor R3; the lightning strike simulator is connected to the power supply V, and the power supply V is connected to the charging current limiting resistor R1 and the fuse F1, and the current limiting resistor R1 and the fuse F1 are respectively connected to the AC-DC converter, and the AC-DC converter is connected to both ends of the capacitor to be tested, and the capacitor to be tested is connected to the discharge resistor R3. In step three, the entire simulation test tool is equivalent to a fast charger device. More specifically, in the simulation test tool circuit, R1 simulates the equivalent resistance in series of the input circuit of the fast charger device, and the F1 fuse simulates the fuse of the fast charger device to protect the circuit from overcurrent. D1~D4 full-bridge rectifier simulates the AC-DC conversion of the whole fast charger equipment, Cx capacitor to be tested simulates the filter capacitor in the circuit of the whole fast charger equipment to smooth the circuit voltage, and R3 simulates the working load of the whole fast charger equipment to ensure that the capacitor is in a dynamic working process during the test. The working state of the capacitor to be tested at this time is equivalent to the actual working state of the capacitor in the circuit board when the whole fast charger equipment is working.

[0032] Step 4: Use the detection equipment to detect the voltage across the capacitor to be tested in step 3 until the voltage across the capacitor to be tested reaches the maximum lightning surge voltage V2 of the capacitor. Record the simulated lightning surge voltage V3 value actually applied by the simulation test tooling at this time, and use the voltage value of the simulated lightning surge voltage V3 as the capacitor reference test voltage V4.

[0033] Specifically, the voltage across the capacitor monomer to be tested in the simulation test tool is equivalent to the voltage of the capacitor monomer in the whole circuit of the fast charger device. The voltage across the capacitor monomer to be tested in step three is detected by the detection equipment. When the voltage across the capacitor monomer to be tested in the simulation test tool is adjusted to be the same as the lightning surge voltage V2 across the capacitor monomer in the circuit during the whole test of the fast charger device, the simulated lightning surge voltage V3 value actually applied in the simulation test tool is recorded at this time, and the voltage value of the simulated lightning surge voltage V3 is used as the capacitor monomer reference test voltage V4. It can be understood that as long as the simulation test tool applies the capacitor monomer reference test voltage V4, it can equivalently simulate the lightning surge voltage V2 actually borne by the capacitor monomer in the whole circuit of the fast charger device. Thereby achieving the effect of whole machine verification in the form of capacitor monomer verification.

[0034] Step 5: Install the capacitor to be tested into the simulation test tooling, and use the simulation test tooling to apply the capacitor reference test voltage V4 value in step 4 to the capacitor to be tested. The capacitor that can withstand the application of the capacitor reference test voltage V4 without failure is a qualified capacitor that meets the requirements for lightning surge resistance.

[0035] Specifically, in the simulation test tooling, applying a capacitor cell reference test voltage V4 to the capacitor cell to be tested is equivalent to applying the lightning surge voltage V1 required by the design of the fast charger device to the entire fast charger device. It can be understood that when the simulation test tooling applies a capacitor cell reference test voltage V4 to the capacitor cell to be tested, if the capacitor cell to be tested can withstand the applied capacitor cell reference test voltage V4 without failure, it can be proved that when the capacitor cell to be tested is installed in the entire fast charger device for use, it can also withstand the lightning surge voltage V1 required by the design of the fast charger device. Through the test of the simulation test tooling, it is possible to predict whether the capacitor cell to be tested meets the lightning surge voltage V1 required by the entire device. The effect of whole device verification can be achieved by simply simulating the capacitor cell.

[0036] The following are specific embodiments

[0037] This embodiment uses the commonly used specifications of fast charging power supply: capacity 3.3 ~ 82uF, voltage 200 ~ 600VDC capacitor specifications for example testing. The fast charging power supply meets the lightning surge voltage of 1.5KV. The number of test capacitor monomer samples is 1000.

[0038] Example 1

[0039] Step 1: According to the lightning surge voltage V1 value of 1.5KV required by the fast charger equipment design, a lightning surge voltage V1 value of 1.5KV is applied to the voltage input terminal of the fast charger equipment;

[0040] Step 2: Use an oscilloscope to detect the maximum surge voltage value that the two ends of the capacitor on the fast charger device can actually withstand, and record the maximum lightning surge voltage V2 value of the capacitor monomer as 0.7 KV;

[0041] Step 3: Install the capacitor to be tested into the simulation test fixture, and use the simulation test fixture to apply a simulated lightning surge voltage V3 with an incremental value of 0.1KV to the capacitor to be tested;

[0042] Step 4: Use an oscilloscope to detect the voltage across the capacitor to be tested in step 3, until the voltage across the capacitor to be tested reaches the maximum lightning surge voltage V2 of the capacitor, which is 0.7 KV, and record the simulated lightning surge voltage V3 value actually applied by the simulation test tooling as 1KV, and use the voltage value of the simulated lightning surge voltage V3 1KV as the capacitor monomer reference test voltage V4; that is, 1KV is used as the capacitor monomer reference test voltage;

[0043] Step 5: Install the capacitor to be tested into the simulation test fixture, and use the simulation test fixture to apply the capacitor reference test voltage V4 of 1KV in step 4 to the capacitor to be tested. The capacitor that can withstand the application of the capacitor reference test voltage V4 of 1KV and does not fail is a qualified capacitor that meets the lightning surge resistance requirement of 1.5KV for the fast charger equipment.

[0044] Step 6: Provide capacitor monomers that have passed the lightning strike verification of the simulated test tooling and install them in the fast charging power supply product for use. Apply a lightning strike voltage of 1.5KV to the fast charging power supply unit, record the data through the lightning strike test, and try to further confirm the accuracy of the capacitor monomer simulation verification through the lightning strike resistance verification of the fast charging power supply unit again.

[0045] Example 2

[0046] This embodiment uses the commonly used specifications of fast charging power supply: capacity 3.3 ~ 82uF, voltage 200 ~ 600VDC capacitor specifications for example testing. The fast charging power supply meets the lightning surge voltage of 2KV. The number of test capacitor monomer samples is 1000.

[0047] Step 1: According to the lightning surge voltage V1 value of 2KV required by the fast charger equipment design, a lightning surge voltage V1 value of 2KV is applied to the voltage input terminal of the fast charger equipment;

[0048] Step 2: Use an oscilloscope to detect the maximum surge voltage value that the two ends of the capacitor on the fast charger can actually withstand, and record the maximum lightning surge voltage V2 value of the capacitor as 0.85KV;

[0049] Step 3: Install the capacitor to be tested into the simulation test fixture, and use the simulation test fixture to apply a simulated lightning surge voltage V3 with an incremental value of 0.2KV to the capacitor to be tested;

[0050] Step 4: Use an oscilloscope to detect the voltage across the capacitor to be tested in step 3 until the voltage across the capacitor to be tested reaches the maximum lightning surge voltage V2 of the capacitor, which is 0.85KV. Record the simulated lightning surge voltage V3 value actually applied by the simulation test tool as 1.3KV. Use the voltage value of the simulated lightning surge voltage V3, 1.3KV, as the capacitor reference test voltage V4; that is, use 1.3KV as the capacitor reference test voltage;

[0051] Step 5: Install the capacitor to be tested into the simulation test fixture, and use the simulation test fixture to apply the capacitor reference test voltage V4 of 1.3KV in step 4 to the capacitor to be tested. The capacitor that can withstand the application of the capacitor reference test voltage V4 of 1.3KV without failure is a qualified capacitor that meets the lightning surge resistance requirement of 2KV for the fast charger equipment.

[0052] Step 6: Provide capacitor monomers that have passed the lightning strike verification of the simulated test tooling and install them in the fast charging power supply product for use. Apply a 2KV lightning strike voltage to the fast charging power supply unit, record the data through the lightning strike test, and try to further confirm the accuracy of the capacitor monomer simulation verification through the lightning strike resistance verification of the fast charging power supply unit again.

[0053] Example 3

[0054] This embodiment uses the commonly used specifications of fast charging power supply: capacity 3.3 ~ 82uF, voltage 200 ~ 600VDC capacitor specifications for example testing. The fast charging power supply meets the lightning surge voltage of 3KV. The number of test capacitor monomer samples is 1000.

[0055] Step 1: According to the lightning surge voltage V1 value of 3KV required by the fast charger equipment design, a lightning surge voltage V1 value of 3KV is applied to the voltage input terminal of the fast charger equipment;

[0056] Step 2: Use an oscilloscope to detect the maximum surge voltage value that the two ends of the capacitor on the fast charger device can actually withstand, and record the maximum lightning surge voltage V2 value of the capacitor as 1.1 KV;

[0057] Step 3: Install the capacitor to be tested into the simulation test fixture, and use the simulation test fixture to apply a simulated lightning surge voltage V3 with an incremental value of 0.3KV to the capacitor to be tested;

[0058] Step 4: Use an oscilloscope to detect the voltage across the capacitor to be tested in step 3 until the voltage across the capacitor to be tested reaches the maximum lightning surge voltage V2 of the capacitor, which is 1.1 KV. Record the simulated lightning surge voltage V3 value actually applied by the simulation test tool as 1.8 KV. Use the voltage value of the simulated lightning surge voltage V3, 1.8 KV, as the capacitor reference test voltage V4; that is, use 1.8 KV as the capacitor reference test voltage;

[0059] Step 5: Install the capacitor to be tested into the simulation test fixture, and use the simulation test fixture to apply the capacitor reference test voltage V4 of 1.8KV in step 4 to the capacitor to be tested. The capacitor that can withstand the application of the capacitor reference test voltage V4 of 1.8KV without failure is a qualified capacitor that meets the lightning surge resistance requirement of 3KV for the fast charger equipment.

[0060] Step 6: Provide capacitor monomers that have passed the lightning strike verification of the simulated test tooling and install them in the fast charging power supply product for use. Apply a 3KV lightning strike voltage to the fast charging power supply unit, record the data through the lightning strike test, and try to further confirm the accuracy of the capacitor monomer simulation verification through the lightning strike resistance verification of the fast charging power supply unit again.

[0061] Comparative Example 1

[0062] This embodiment uses the commonly used specifications of fast charging power supply: capacity 3.3 ~ 82uF, voltage 200 ~ 600VDC capacitor specifications for example testing. The fast charging power supply meets the lightning surge voltage of 2KV. The number of test capacitor monomer samples is 1000.

[0063] Compared with Example 1, Example 2 and Example 3, the difference between Comparative Example 1 is that the capacitor monomer used in Comparative Example 1 has not undergone the lightning strike simulation test of the simulation test tooling, and the capacitor monomer is directly used in the fast charging power supply, and the other conditions are the same as those of Example 1, Example 2 and Example 3.

[0064] Table 1:

[0065] Table 1 is the specific parameters of the lightning strike test of the fast charging power supply of the embodiment and the comparative example

[0066]

[0067] As can be seen from Table 1, the present invention uses a simulation test tool to perform a preliminary equivalent simulation lightning protection test on the capacitor monomer, and the capacitor monomers that do not meet the lightning protection test are initially screened and eliminated through the equivalent simulation lightning protection test, thereby avoiding the capacitor monomers that do not meet the lightning protection voltage requirements from being installed and used in the fast charging power supply unit in the later stage. This simulation verification method can quickly, efficiently and accurately simulate the lightning protection surge capability of the fast charging power supply unit, and the accuracy of the capacitor monomer simulation is confirmed by the lightning protection verification of the fast charging power supply unit again. The pre-equivalent simulation lightning protection test results of the simulation test tool and the subsequent fast charging unit verification results reached 99.6% consistency.

[0068] In summary, it can be shown that after the qualified capacitor monomers that have undergone the equivalent simulated lightning strike test in advance by the simulation test tooling are applied to the fast-charging power supply unit, the pass rate of the fast-charging power supply unit in the lightning strike test reaches 99.6%. However, the capacitor monomers that have not undergone the equivalent simulated lightning strike test in advance by the simulation test tooling are directly applied to the fast-charging power supply unit. After testing, the pass rate of the fast-charging power supply unit in the lightning strike test is only 79.7%. It can be seen from this that the pre-equivalent simulated lightning strike test by the simulation test tooling has significantly improved the pass rate of the product. The effect of whole machine verification can be achieved by simply simulating the capacitor monomer verification.

[0069] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, and therefore the present invention is not limited to the embodiments described in the specific implementation manners. Any other implementation manners derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. A method for simulating and verifying lightning strikes on aluminum electrolytic capacitors for fast charging. It is characterized in that The following steps are involved: Step 1: According to the lightning surge voltage V1 required by the fast charger design, apply a lightning surge voltage V1 to the voltage input terminal of the fast charger device; Step 2: Use a detection device to detect the maximum surge voltage value that the two ends of the capacitor monomer on the fast charger device can actually withstand, and obtain the maximum lightning surge voltage V2 of the capacitor monomer; Step 3: Install the capacitor to be tested into the simulation test fixture, and use the simulation test fixture to apply a stepped simulated lightning surge voltage V3 to the capacitor to be tested; Step 4: Use the detection equipment to detect the voltage across the capacitor monomer to be tested in step 3, until the voltage across the capacitor monomer to be tested reaches the maximum lightning surge voltage V2 value of the capacitor monomer, record the simulated lightning surge voltage V3 value actually applied by the simulation test tool at this time, and use the voltage value of the simulated lightning surge voltage V3 as the capacitor monomer reference test voltage V4; Step 5: Install the capacitor to be tested into the simulation test tooling, and use the simulation test tooling to apply the capacitor reference test voltage V4 value in step 4 to the capacitor to be tested. The capacitor that can withstand the application of the capacitor reference test voltage V4 without failure is a qualified capacitor that meets the requirements for lightning surge resistance.

2. According to claim 1, a method for lightning strike simulation verification of a single aluminum electrolytic capacitor for fast charging, Features: The detection device is an oscilloscope.

3. According to the method of claim 1, a lightning strike simulation verification method for a single aluminum electrolytic capacitor for fast charging, Features: The step-type simulated lightning surge voltage V3 is an adjustable input voltage, and its step increment value is 0.1KV to 1KV in a cyclic increment.

4. The method for lightning strike simulation verification of a single aluminum electrolytic capacitor for fast charging according to claim 1, Features: The capacitor monomer is one of a pin-shaped capacitor, a bolt-shaped capacitor, a horn-shaped capacitor, and a chip-shaped capacitor.

5. The method for lightning strike simulation verification of a single aluminum electrolytic capacitor for fast charging according to claim 1, Features: The simulation test tooling includes a power supply V, a lightning strike simulator, a charging current limiting resistor R1, a fuse F1, an AC-DC converter, a capacitor to be tested, and a discharge resistor R3; the lightning strike simulator is connected to the power supply V, the power supply V is connected to the charging current limiting resistor R1 and the fuse F1, the current limiting resistor R1 and the fuse F1 are respectively connected to the AC-DC converter, the AC-DC converter is connected to both ends of the capacitor to be tested, and the capacitor to be tested is connected to the discharge resistor R3.

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