Pulse voltage output circuit and surge voltage testing device

Abstract

The utility model discloses a pulse voltage output circuit and a surge voltage testing device. The pulse voltage output circuit comprises a first power supply, an energy storage module, a first switch module, at least one coupling module and at least one inductive circuit module, the energy storage module is connected with the first power supply and used for storing electric energy output by the first power supply, and the first end of the first switch module is connected with the first end of the energy storage module. The at least one inductive circuit module is connected in series between the second end of the first switch module and the second end of the energy storage module, the first end of each coupling module is correspondingly connected with the first end of the inductive circuit module, and the second end of each coupling module is used for being connected with external equipment. According to the technical scheme provided by the embodiment of the invention, the multi-path coupling module is connected with the inductive circuit module, so that the pulse voltage can be completely applied to the tested equipment, the surge voltage resistance of all sampling channels can be verified at the same time, the reliability of the tested equipment is improved, and the test cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic equipment, in particular to a pulse voltage output circuit and a surge voltage testing device. Background Art

[0002] Surge voltage test equipment is mainly used to test the breakdown resistance of electronic equipment when facing transient voltages (such as lightning strikes, switching power supplies, etc.). The principle is to simulate surge voltages that may occur in the real environment and apply these voltages to the input of the device under test to evaluate the stability and anti-interference ability of the device.

[0003] Conventional surge voltage test equipment usually superimposes a pulse voltage on the device under test. Since the impedance of the power supply of the device under test is much lower than that of the device under test, most of the surge pulse is absorbed by the power supply. However, the surge voltage may also come from the power supply of the device under test. Traditional surge voltage equipment cannot simulate and verify the surge resistance of the device under test. In addition, for products with multiple sampling channels such as BMS (Battery Management System) slave boards, it is also impossible to simultaneously verify the surge resistance of all battery cell sampling channels, which makes the test cost high and prone to problems such as power overload and equipment damage. Utility Model Content

[0004] The utility model provides a pulse voltage output circuit and a surge voltage test device to solve the problem that the existing surge voltage test equipment cannot verify the surge voltage resistance capability of a sampling channel.

[0005] According to one aspect of the utility model, a pulse voltage output circuit is provided, comprising: a first power supply, an energy storage module, a first switch module, at least one coupling module and at least one inductive circuit module;

[0006] The energy storage module is connected to the first power supply and is used to store the electric energy output by the first power supply;

[0007] The first end of the first switch module is connected to the first end of the energy storage module, and at least one of the inductive circuit modules is connected in series between the second end of the first switch module and the second end of the energy storage module;

[0008] The first end of each coupling module is respectively connected to the first end of the inductive circuit module; the second end of each coupling module is used to connect to an external device.

[0009] Optionally, the energy storage module includes a first capacitor, and two ends of the first capacitor serve as two ends of the energy storage module respectively.

[0010] Optionally, the inductive circuit module includes an inductor.

[0011] Optionally, the coupling module includes a second capacitor, and a first end and a second end of the second capacitor serve as a first end and a second end of the coupling module respectively.

[0012] Optionally, the pulse voltage output circuit further includes a plurality of second power supplies, and the second power supplies are connected between the second ends of two adjacent second capacitors.

[0013] Optionally, the number of the coupling modules is k, the number of the inductive circuit modules is k, and the circuit also includes k diodes corresponding one-to-one to the k second power supplies; the negative electrode of the kth second power supply is connected to the second end of the kth second capacitor, the positive electrode of the kth second power supply is connected to the positive electrode of the corresponding diode, and the negative electrode of the diode is connected to the second end of the kth second capacitor, wherein k is a positive integer.

[0014] Optionally, the pulse voltage output circuit also includes a second switch module and a resistor; the first end of the second switch module is connected to the positive electrode of the first power supply, the second end of the second switch module is connected to the first end of the resistor, the first end of the resistor is connected to the first end of the energy storage module, and the second end of the energy storage module is connected to the negative electrode of the first power supply.

[0015] Optionally, the first power supply is a power supply with adjustable output voltage.

[0016] Optionally, the first power supply and the second power supply are both DC power supplies.

[0017] According to another aspect of the present invention, a surge voltage testing device is provided, comprising the pulse voltage output circuit provided by any embodiment of the present invention.

[0018] The technical solution provided by the utility model is that the energy storage module is connected to the first power supply and the first switch module respectively, the energy of the pulse voltage of the first power supply can be set by adjusting the parameters of the energy storage module, and the energy storage module is charged and stored by the first power supply. When the first switch module is closed, the energy storage module releases energy through the inductive circuit module. At the moment when the first switch module is closed, the coupling module distributes the induced voltage generated by the inductive circuit module to each external device and allows the pulse voltage to be fully applied to the test device, thereby realizing the surge voltage resistance test of multiple sampling channels of the tested device, and avoiding the problem that the surge resistance of all sampling channels of electronic products cannot be verified simultaneously due to the multiple sampling channels, so as to ensure the reliability of the electronic equipment under test and reduce the test cost.

[0019] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments 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 these drawings without creative work.

[0021] Figure 1 A schematic diagram of the structure of a pulse voltage output circuit provided by the utility model;

[0022] Figure 2 A schematic diagram of the structure of another pulse voltage output circuit provided by the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of another pulse voltage output circuit provided by the utility model. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] Figure 1A schematic diagram of a pulse voltage output circuit provided by the utility model, referring to Figure 1 The pulse voltage output circuit provided by the utility model includes a first power supply 1, an energy storage module 2, a first switch module 3, at least one coupling module 5 and at least one inductive circuit module 4; the energy storage module 2 is connected to the first power supply 1 and is used to store the electric energy output by the first power supply 1; the first end of the first switch module 3 is connected to the first end of the energy storage module 2, and the at least one inductive circuit module 4 is connected in series between the second end of the first switch module 3 and the second end of the energy storage module 2; the first end of each coupling module 5 is respectively connected to the first end of the inductive circuit module 4; the second end of each coupling module 5 is used to connect to an external device.

[0027] Among them, the first power supply 1 is used to set the amplitude of the pulse voltage, and the parameters of the energy storage module 2 can be adjusted to set the energy of the pulse voltage of the first power supply 1. The first switch module 3 is used to release the energy of the energy storage module 2 to the subsequent circuit. The inductive circuit module 4 is used to distribute the pulse voltage energy transmitted by the energy storage module 2 to each external device via OUT1. The coupling module 5 is used to couple the induced voltage generated by the inductive circuit module 4 to the external device.

[0028] For example, in this embodiment, at least one inductive module includes an inductive circuit module 4, at least one coupling module includes a coupling module 5, and a second end of the coupling module 5 is connected to an external device via OUT1.

[0029] Specifically, the energy storage module 2 is charged according to the power supply of the first power supply 1. When the energy storage module 2 is fully charged, the first switch module 3 is closed, so that the energy storage module 2 is connected to the inductive circuit module 4 and then discharged to the subsequent circuit. At the moment when the first switch module 3 is closed, the energy storage module 2 discharges to the inductive circuit module 4, and an induced voltage is generated at both ends of the inductive circuit module 4. The induced voltage is output to the external device through the coupling module 5 via OUT1, and the voltage generated by the inductive circuit module 4 can be fully applied to the device under test, thereby realizing the surge voltage resistance test of the device under test.

[0030] By setting the parameters of the first power supply 1 and the energy storage module 2, the energy and width of the pulse voltage can be set.

[0031] The technical solution provided by the utility model is that the energy storage module 2 is connected to the first power supply 1 and the first switch module 3 respectively. The energy of the pulse voltage of the first power supply 1 can be set by adjusting the parameters of the energy storage module 2, and the energy storage module 2 is charged and stored by the first power supply 1. When the first switch module 3 is closed, the energy storage module 2 releases energy through the inductive circuit module 4. At the moment when the first switch module 3 is closed, the coupling module 5 distributes the induced voltage generated by the inductive circuit module 4 to the external device through OUT1 and allows the pulse voltage to be fully applied to the test equipment, thereby realizing the surge voltage test of the device under test to ensure the reliability of the electronic device under test. And by increasing the number of inductive circuit modules 4 and coupling modules 5, the surge voltage test of all sampling channels of the device under test can be realized, reducing the test cost.

[0032] Figure 2 This is a schematic diagram of another pulse voltage output circuit provided by the utility model, referring to Figure 2 On the basis of the above embodiment, the energy storage module 2 includes a first capacitor C, and two ends of the first capacitor C serve as two ends of the energy storage module 2 respectively.

[0033] The energy of the pulse voltage of the first power supply 1 can be set by setting the parameters of the first capacitor C.

[0034] Optionally, the inductive circuit module 4 includes an inductor L1.

[0035] The inductor L1 is used to distribute the pulse voltage energy transmitted by the first capacitor C to each external device via OUT1.

[0036] Optionally, the coupling module 5 includes a second capacitor C1 , and a first end and a second end of the second capacitor C1 serve as a first end and a second end of the coupling module 5 , respectively.

[0037] The second capacitor C1 is used to couple the induced voltage at both ends of the inductor L1. The first power source 1, the first capacitor C and the second end of the inductor L1 are grounded.

[0038] For example, in the technical solution of this embodiment, at least one inductive circuit module includes three inductive circuit modules 4, that is, includes three inductors L1, and the three inductors L1 can be the same or different; at least one coupling module includes three coupling modules 3, that is, includes three second capacitors C1, and the three second capacitors C1 can be the same or different. The second capacitor C1 is connected to an external device via OUT1, including three OUT1 channels, and the external devices connected to OUT1 can be the same or different.

[0039] Optionally, the first switch module 3 includes a first switch S1 , a first end of the first switch S1 is connected to a first end of the energy storage module 2 , and a second end of the first switch S1 is connected to the inductive circuit module 4 .

[0040] Specifically, the first power supply 1 continuously charges the first capacitor C. When the first capacitor C is fully charged, if the first switch S1 is closed, the first capacitor C is connected to the inductor L1 in response to the closing signal and releases energy to the subsequent circuit. At the moment the first switch S1 is closed, the first capacitor C is connected to the inductor L1 for discharge, so that an induced voltage is generated at both ends of the inductor L1. The induced voltage is output to the external device through the second capacitor C1 and OUT1, thereby realizing the surge voltage resistance test of multiple sampling channels of the device under test.

[0041] In the technical solution provided in this embodiment, the first capacitor C is respectively connected to the first power supply 1 and the first switch S1, and the energy of the pulse voltage can be set by adjusting the parameters of the first capacitor C. When the first capacitor C is fully charged and the first switch S1 is closed, the energy is released to the subsequent circuit, and then the second capacitor C1 generates an induced voltage at both ends of the inductor L1 and outputs it to the external device through OUT1. The technical solution provided in this embodiment can simulate a variety of surge voltage conditions that may occur in a real environment, so as to more comprehensively evaluate the surge resistance of the device under test. In addition, the test method uses multiple inductors L1 and multiple second capacitors C1 as well as multiple sampling channel outputs, which is conducive to simultaneously verifying the surge resistance of all battery cell sampling channels for products such as BMS slave boards with multiple sampling channels, so as to ensure the reliability of the device under test and reduce testing costs.

[0042] Figure 3 This is a schematic diagram of another pulse voltage output circuit provided by the utility model, referring to Figure 3 On the basis of the above embodiments, the pulse voltage output circuit further includes a plurality of second power supplies U1, and the second power supplies U1 are connected between the second ends of two adjacent second capacitors C1.

[0043] The second power supply U1 is used to set the output voltage of each channel before the pulse voltage is generated.

[0044] Optionally, the number of coupling modules 5 is k, the number of inductive circuit modules 4 is k, and the circuit also includes k diodes D1 corresponding one-to-one to the k second power supplies U1; the negative electrode of the kth second power supply U1 is connected to the second end of the kth second capacitor C1, the positive electrode of the kth second power supply U1 is connected to the positive electrode of the corresponding diode D1, and the negative electrode of the diode D1 is connected to the second end of the kth second capacitor C1, where k is a positive integer.

[0045] The diode D1 ensures that the pulse voltage generated by the inductive circuit module 4 will not be absorbed by the second power supply U1 and can be applied to the external device through OUT1.

[0046] Optionally, the pulse voltage output circuit also includes a second switch module 6 and a resistor R; the first end of the second switch module 6 is connected to the positive electrode of the first power supply 1, the second end of the second switch module 6 is connected to the first end of the resistor R, the first end of the resistor R is connected to the first end of the energy storage module 2, and the second end of the energy storage module 2 is connected to the negative electrode of the first power supply 1.

[0047] The second switch module 6 is used to control the first power supply 1 to charge the first capacitor C. Exemplarily, when the second switch module 6 is closed, the first power supply 1 charges the first capacitor C; when the second switch module 6 is disconnected, the first power supply 1 stops charging the first capacitor C. The resistor R is used to control the charging speed of the first capacitor C and make the charging process of the first capacitor C more stable.

[0048] Optionally, the first power supply 1 is a power supply with adjustable output voltage.

[0049] The adjustable power supply is used to set the amplitude of the pulse voltage.

[0050] Optionally, both the first power supply 1 and the second power supply U1 are DC power supplies.

[0051] For example, in this embodiment, at least one inductive circuit module 4 includes k inductive circuit modules 4, that is, k inductors L1, and the k inductors L1 can be the same or different; at least one coupling module 5 includes k coupling modules 3, that is, k second capacitors C1, and the k second capacitors C1 can be the same or different. The second capacitor C1 is connected to an external device via OUT1, that is, includes k OUT1 channels, and the external devices connected to OUT1 can be the same or different, where k is a positive integer.

[0052] Optionally, the second switch module 6 includes a second switch S2 , a first end of the second switch S2 is connected to the positive electrode of the first power source 1 , and a second end of the second switch S2 is connected to the first end of the resistor R.

[0053] Specifically, when the surge voltage test is performed on the multiple sampling channels of the device under test, the second switch S2 is closed so that the first power supply 1 charges the first capacitor C through the resistor R. In response to the completion of charging of the first capacitor C, the second switch S2 is opened, and the first switch S1 is closed so that the charge on the first capacitor C is released through the inductor L1. At the moment when the first switch S1 is closed, an induced voltage is generated across the inductor L1. The first capacitor C couples the induced voltage to the external device through OUT1 and superimposes the induced voltage on each first capacitor C and the second power supply U1 of the output channel of the external device (i.e., the output voltage of each channel before the pulse voltage is generated). The pulse voltage output circuit also includes a diode D1. Due to the presence of the diode D1, the induced voltage generated across the inductor L1 will not be absorbed by the second power supply U1, so that the pulse voltage generated by the inductor L1 can be fully applied to the external device through OUT1, thereby realizing the surge voltage test on the multiple sampling channels of the test device.

[0054] When it is not necessary to perform surge voltage test on the multi-sampling channels of the device under test, the second switch S2 is disconnected, the first power supply 1 does not charge the first capacitor C, and the pulse voltage generation circuit does not work. For example, when the second switch S2 is disconnected, there is no accumulated charge on the first capacitor C, and even if the first switch S1 is closed, the first capacitor C will not be discharged through the inductor L1, and no induced voltage is generated across the inductor L1, and no pulse voltage is generated.

[0055] Optionally, the first power source 1, the second power source U1, the first capacitor C and the second end of the inductor L1 are grounded.

[0056] In the technical solution provided in this embodiment, the first capacitor C is connected to the first switch S1 and the second switch S2 to realize the charging and discharging process of the first capacitor C. When the second switch S2 is closed to fully charge the first capacitor, the first switch S1 is closed, and an induced voltage is generated across the inductor L1 and coupled to the output channel of the external device through the second capacitor C1. In addition, due to the presence of the diode D1, the pulse voltage generated by the inductor L1 can be fully applied to the multiple sampling channels of the test equipment to realize the anti-surge voltage test function. When the second switch S2 is disconnected, the pulse voltage generation circuit is disconnected, the anti-surge test function is prohibited, and the working mode is selected according to the specific situation to achieve the purpose of energy saving. The design scheme provided in this embodiment can effectively realize the anti-surge voltage test of the multiple sampling channels of the tested device, and provide pulse voltage superposition and protection to meet the test requirements.

[0057] Optionally, the pulse voltage output circuit can adjust the number and parameters of the inductor L1, the second capacitor C1, the second power supply U1 and the diode D1 according to actual test requirements to adapt the output channel to achieve surge voltage testing of all sampling channels of the required device under test, which is not limited here.

[0058] This embodiment also provides a surge voltage testing device, including the pulse voltage output circuit provided by any embodiment of the utility model. Since the surge voltage testing device includes the pulse voltage output circuit provided by any embodiment of the utility model, the surge voltage testing device has the beneficial effects provided by any of the above-mentioned embodiments.

[0059] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0060] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A pulse voltage output circuit, characterized in that: include: A first power supply, an energy storage module, a first switch module, at least one coupling module and at least one inductive circuit module; The energy storage module is connected to the first power supply and is used to store the electric energy output by the first power supply; The first end of the first switch module is connected to the first end of the energy storage module, and at least one of the inductive circuit modules is connected in series between the second end of the first switch module and the second end of the energy storage module; The first end of each coupling module is respectively connected to the first end of the inductive circuit module; the second end of each coupling module is used to connect to an external device.

2. The circuit according to claim 1, characterized in that The energy storage module includes a first capacitor, and two ends of the first capacitor serve as two ends of the energy storage module respectively.

3. The circuit according to claim 1, characterized in that The inductive circuit module includes an inductor.

4. The circuit according to claim 1, characterized in that The coupling module includes a second capacitor, and a first end and a second end of the second capacitor serve as a first end and a second end of the coupling module respectively.

5. The circuit according to claim 4, characterized in that It also includes a plurality of second power supplies, wherein the second power supplies are connected between the second ends of two adjacent second capacitors.

6. The circuit according to claim 4, characterized in that The number of the coupling modules is k, the number of the inductive circuit modules is k, and the circuit further includes k diodes corresponding one-to-one to the k second power supplies; the negative electrode of the kth second power supply is connected to the second end of the kth second capacitor, the positive electrode of the kth second power supply is connected to the positive electrode of the corresponding diode, and the negative electrode of the diode is connected to the second end of the kth second capacitor, wherein k is a positive integer.

7. The circuit according to claim 1, characterized in that It also includes a second switch module and a resistor; the first end of the second switch module is connected to the positive electrode of the first power supply, the second end of the second switch module is connected to the first end of the resistor, the first end of the resistor is connected to the first end of the energy storage module, and the second end of the energy storage module is connected to the negative electrode of the first power supply.

8. The circuit according to claim 1, characterized in that The first power supply is a power supply with adjustable output voltage.

9. The circuit according to claim 5, characterized in that The first power supply and the second power supply are both direct current power supplies.

10. A surge voltage testing device, characterized in that: A pulse voltage output circuit comprising the pulse voltage output circuit according to any one of claims 1 to 9.

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