CN210665978U - Storage battery charging, discharging and charging and discharging test circuit - Google Patents
Storage battery charging, discharging and charging and discharging test circuit Download PDFInfo
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- CN210665978U CN210665978U CN201920952647.2U CN201920952647U CN210665978U CN 210665978 U CN210665978 U CN 210665978U CN 201920952647 U CN201920952647 U CN 201920952647U CN 210665978 U CN210665978 U CN 210665978U
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Abstract
The utility model provides a storage battery charges, discharges and charge-discharge test circuit, storage battery charge test circuit includes built-in AC/DC power module, IGBT Q2, inductance L1, resistance Rs, singlechip and surveyed storage battery. The utility model provides a storage battery charging test circuit, the AC input voltage is through built-in AC DC power module, convert the alternating voltage into the fixed value, for IGBT Q2 provides operating voltage, singlechip output pulse control signal PWM2 drive IGBT Q2's base, IGBT Q2's projecting pole is in proper order through inductance L1 and resistance Rs for being surveyed storage battery and charge, the size of the duty cycle through singlechip regulation pulse control signal PWM2, can charge to the survey storage battery of different voltages.
Description
Technical Field
The utility model relates to a storage battery tests technical field, more specifically relates to a storage battery charges, discharges and charge-discharge test circuit.
Background
The charge and discharge test of the storage battery pack is particularly important for the safe use of the storage battery pack, the voltage range of the charge and discharge test product of the conventional storage battery pack in the technical field is generally narrow, and a charge circuit and a discharge circuit of the storage battery are basically designed independently. For the storage battery pack with different grades of voltage, namely wide-range voltage, corresponding charge and discharge testers are also available on the market, but the used technical scheme is a sectional control mode, namely, each voltage section is realized by a special circuit, so that the cost and the volume are relatively high.
The common storage battery pack charge and discharge tester can only carry out charge and discharge tests on storage battery packs with one voltage class, and the application range is limited. The existing storage battery pack has various specifications and is classified according to nominal voltage grades, including storage battery packs of 4V, 6V, 12V, 24V, 48V, 72V, 96V, 120V, 220V or 240V and the like, so that the storage battery pack with multiple voltage grades needs to prepare 6-7 charge and discharge testers according to the existing charge and discharge test means, and the manpower, financial resources and material resources are quite wasted.
SUMMERY OF THE UTILITY MODEL
The utility model provides an overcome above-mentioned problem or solve storage battery charging, discharge and the charge-discharge test circuit of above-mentioned problem at least partially.
According to the utility model discloses a first aspect provides a storage battery charging test circuit, including built-in AC/DC power module, IGBT Q2, inductance L1, resistance Rs, singlechip and the storage battery that is surveyed;
the input end of the built-in AC/DC power supply module is connected with an alternating current input voltage, the positive output end of the built-in AC/DC power supply module is electrically connected with the collector of the IGBTQ2, the negative output end of the built-in AC/DC power supply module is electrically connected with the emitter of the IGBT Q2 through the inductor L1, the inductor L1 is also electrically connected with a tested storage battery pack through the resistor Rs, and the base of the IGBT Q2 is electrically connected with the single chip microcomputer;
alternating current input voltage is converted into alternating current voltage with a fixed value through the built-in AC/DC power supply module to provide working voltage for the IGBT Q2, the single chip microcomputer outputs a pulse control signal PWM2 to drive the base electrode of the IGBT Q2, and the emitter electrode of the IGBT Q2 sequentially passes through the inductor L1 and the resistor Rs to charge the storage battery pack to be tested.
On the basis of the technical scheme, the utility model discloses can also make following improvement.
The positive electrode of the first capacitor assembly is connected with the common end of the inductor L1 and the capacitor Rs, and the negative electrode of the first capacitor assembly is electrically connected with the negative electrode end of the tested storage battery pack;
the positive electrode of the second capacitor assembly is electrically connected with the positive electrode output end of the built-in AC/DC power supply module, and the negative electrode of the second capacitor assembly is electrically connected with the negative electrode output end of the built-in AC/DC power supply module.
Furthermore, an external power supply is used for replacing the built-in AC/DC power supply module, and the output end of the external power supply is electrically connected with the collector electrode of the IGBT Q2.
According to a second aspect of the present invention, there is provided a battery pack discharge test circuit,
the device comprises a tested storage battery pack, a resistor Rs, a resistor R1, an IGBT Q1, an IGBT Q2, an inductor L1 and a singlechip;
the positive end of the tested storage battery pack is electrically connected with one end of a resistor R1 through the resistor Rs, the other end of the resistor R1 is electrically connected with the collector of the IGBT Q2, the base of the IGBT Q2 is electrically connected with the single chip microcomputer, the emitter of the IGBT Q2 is electrically connected with the collector of the IGBT Q1, the base of the IGBT Q1 is electrically connected with the single chip microcomputer, the emitter of the IGBT Q1 is connected with the negative end of the tested storage battery pack, and the inductor L1 is connected between the resistor Rs, the collector of the IGBT Q1 and the common end of the emitter of the IGBT Q2;
the voltage of the detected storage battery pack supplies power to the inductor L1 and the IGBT Q1 through the resistor Rs, the single chip microcomputer outputs a pulse control signal PWM1 to drive the base electrode of the IGBT Q1, and the collector electrode of the IGBT Q1 transmits energy to the resistor R1 through the IGBTQ 2.
The positive electrode of the first capacitor assembly is electrically connected with the common end of the resistor Rs and the resistor R1, and the negative electrode of the first capacitor assembly is electrically connected with the negative electrode end of the tested storage battery pack; and two ends of the second capacitor assembly are respectively and electrically connected with two ends of the resistor R1.
Further, an external load is used to replace the resistor R1.
According to the utility model discloses a third aspect provides a storage battery charge-discharge test circuit, including built-in AC/DC power module, IGBT Q1, IGBT Q2, inductance L1, resistance Rs, resistance R1, singlechip and switch K1, K2, K3 and K4;
the input end of the built-in AC/DC power supply module is connected with an alternating current input voltage, the positive output end of the built-in AC/DC power supply module is respectively and electrically connected with the collector of the IGBT Q2 and one end of the resistor R1 through the switch K2, the negative output end of the built-in AC/DC power supply module is electrically connected with the other end of the resistor R1 through the switch K3 and the switch K4, the base of the IGBT Q2 is electrically connected with the single chip microcomputer, the emitter of the IGBT Q2 is electrically connected with the positive end of the tested storage battery pack sequentially through the inductor L1, the switch K1 and the resistor Rs, the emitter of the IGBT Q2 is also electrically connected with the collector of the IGBT Q1, the base of the IGBT Q1 is electrically connected with the single chip microcomputer, and the emitter of the IGBT Q.
Further, the device also comprises a first capacitor component and a second capacitor component;
the positive electrode of the first capacitor assembly is electrically connected with the common end of the switch K1 and the switch K4, and the negative electrode of the first capacitor assembly is electrically connected with the negative electrode end of the battery pack to be tested;
the positive electrode of the second capacitor assembly is electrically connected with the built-in AC/DC power supply module through the switch K2, and the negative electrode of the second capacitor assembly is electrically connected with the built-in AC/DC power supply module through the switch K3.
Further, the capacitor further comprises an external power supply or an external load, and the external power supply or the external load is electrically connected with the positive electrode of the second capacitor assembly through the switch K2.
Furthermore, the single chip microcomputer is STM32F103C8T 6.
The utility model has the advantages that: according to the charging and discharging test circuit for the storage battery pack, alternating current input voltage is converted into alternating current voltage with a fixed value through a built-in AC/DC power supply module to provide working voltage for the IGBT Q2, the single chip microcomputer outputs a pulse control signal PWM2 to drive the base electrode of the IGBT Q2, the emitter electrode of the IGBT Q2 sequentially passes through an inductor L1 and a resistor Rs to charge the storage battery pack to be tested, and the single chip microcomputer adjusts the duty ratio of the pulse control signal PWM2 to charge the storage battery pack to be tested with different voltages; the voltage of the tested storage battery pack supplies power to the inductor L1 and the IGBT Q1 through the resistor Rs, the single chip microcomputer outputs a pulse control signal PWM1 to drive a base electrode of the IGBT Q1, a collector electrode of the IGBT Q1 transfers energy to the resistor R1 through the IGBT Q2, the single chip microcomputer adjusts the duty ratio of the pulse control signal PWM1 to control different discharging currents of the storage battery packs with different voltages, the same charging test circuit or discharging test circuit is used, the charging and discharging test of the storage battery packs with the voltage levels from 2V to 240V can be met, and the problem of the charging and discharging test of the storage battery packs with different voltage levels of a user is effectively solved.
Drawings
Fig. 1 is a circuit diagram of a battery charging test according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a battery discharge test according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a battery pack charge/discharge test according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1, a battery pack charging test circuit according to an embodiment of the present invention is provided, which includes a built-in AC/DC power module, an IGBT Q2, an inductor L1, a resistor Rs, a single chip microcomputer, and a battery pack to be tested. The input end of the built-in AC/DC power supply module is connected with alternating current input voltage, the positive output end of the built-in AC/DC power supply module is electrically connected with the collector of the IGBT Q2, the negative output end of the built-in AC/DC power supply module is electrically connected with the emitter of the IGBT Q2 through the inductor L1, the inductor L1 is also electrically connected with the storage battery pack to be tested through the resistor Rs, and the base of the IGBT Q2 is electrically connected. The single chip microcomputer is STM32F103C8T6, the built-in AC/DC power supply module is GPR4850DR03, and the IGBT Q2 is of an England IKW75N65EH5 model.
The working principle of the storage battery pack charging test circuit provided by the embodiment is as follows: the AC input voltage is converted into a fixed value AC voltage by the built-in AC/DC power supply module, which converts the AC input voltage into a 48V AC voltage to supply an operating voltage to the IGBT Q2 in this embodiment. The singlechip outputs a pulse control signal PWM2 to drive the base of an IGBT Q2, and the emitter of the IGBT Q2 charges the storage battery pack to be tested through an inductor L1 and a resistor Rs in sequence. The duty ratio of the pulse control signal PWM2 is adjusted through the singlechip, and then the base voltage of the IGBT Q2 is adjusted, the base voltage of the IGBT Q2 is different, and the voltage of the emitter of the IGBT Q2 is also different, so that the storage battery packs with different voltages can be charged. During the charging of the secondary battery packs of different voltages, the charging current can be detected through the resistor Rs. In this embodiment, the battery pack charging test circuit can realize the charging test of the battery pack with the voltage ranging from 2V to 280V, and the maximum charging current can reach 150A.
The utility model discloses an in one embodiment, storage battery charging test circuit still includes first electric capacity subassembly and second electric capacity subassembly, and the positive pole of first electric capacity subassembly is connected with inductance L1 and electric capacity Rs's common terminal, and the negative pole electricity of first electric capacity subassembly is connected the negative pole end of being surveyed storage battery. The positive electrode of the second capacitor assembly is electrically connected with the positive electrode output end of the built-in AC/DC power supply module, and the negative electrode of the second capacitor assembly is electrically connected with the negative electrode output end of the built-in AC/DC power supply module.
The built-in AC/DC power supply module in the above embodiment is a built-in power supply, and in this embodiment, the built-in AC/DC power supply module may be replaced by an external power supply, and the working principle of charging the storage battery packs with different voltages is the same as the charging principle of the storage battery packs with different voltages by the built-in power supply, and therefore, the description is not repeated here.
Referring to fig. 2, the utility model discloses a storage battery test circuit that discharges of embodiment is provided, including being surveyed storage battery, resistance Rs, resistance R1, IGBT Q1, IGBT Q2, inductance L1 and singlechip. The positive end of the tested storage battery pack is electrically connected with one end of a resistor R1 through a resistor Rs, the other end of the resistor R1 is electrically connected with the collector of the IGBT Q2, the base of the IGBT Q2 is electrically connected with the single chip microcomputer, the emitter of the IGBT Q2 is electrically connected with the collector of the IGBT Q1, the base of the IGBT Q1 is electrically connected with the single chip microcomputer, the emitter of the IGBT Q1 is connected with the negative end of the tested storage battery pack, and the inductor L1 is connected between the collector of the resistor Rs and the IGBT Q1 and the common end of the emitter of the IGBT Q2. The single chip microcomputer is STM32F103C8T6, and the IGBT Q1 and the IGBT Q2 are made of British flying IKW75N65EH 5.
The working principle of the battery pack discharge test circuit provided by the embodiment is as follows: the voltage of the detected storage battery pack supplies power to the inductor L1 and the IGBT Q1 through the resistor Rs, the single chip microcomputer outputs a pulse control signal PWM1 to drive the base electrode of the IGBT Q1, the collector electrode of the IGBT Q1 transfers energy to the resistor R1 through the IGBT Q2, and discharging is carried out through the resistor R1. At the moment, the input voltage is the voltage of the tested storage battery pack, different storage battery packs have different grades of voltages, and different discharge currents of the storage battery packs with different voltages are controlled by adjusting the duty ratio of the pulse driving control signal PWM1 through the single chip microcomputer. During the discharge of the battery packs of different voltages, the discharge current is detected through the resistor Rs. In the embodiment, the storage battery pack discharge test circuit can realize the discharge test of the storage battery pack with the voltage ranging from 2V to 280V, and the maximum discharge current can reach 150A.
In an embodiment of the present invention, the provided battery pack discharge test circuit further includes a first capacitor assembly and a second capacitor assembly, the positive electrode of the first capacitor assembly is electrically connected to the common terminal of the resistor Rs and the resistor R1, and the negative electrode of the first capacitor assembly is electrically connected to the negative terminal of the battery pack to be tested; and two ends of the second capacitor assembly are respectively and electrically connected with two ends of the resistor R1.
The resistor R1 in the above embodiment is a built-in load resistor, the built-in load resistor R1 can be replaced by an external load in the embodiment, and the working principle of discharging the storage battery pack with different voltages is the same as that of discharging the storage battery pack with the built-in load resistor, and therefore, the description thereof is not repeated.
Referring to fig. 3, the utility model discloses a storage battery charge and discharge test circuit of embodiment is provided, including built-in AC/DC power module, IGBT Q1, IGBT Q2, inductance L1, resistance Rs, resistance R1, singlechip and switch K1, K2, K3 and K4.
The input end of the built-in AC/DC power supply module is connected with an alternating current input voltage, the positive output end of the built-in AC/DC power supply module is respectively and electrically connected with the collector of the IGBT Q2 and one end of the resistor R1 through the switch K2, and the negative output end of the built-in AC/DC power supply module is electrically connected with the other end of the resistor R1 through the switch K3 and the switch K4. The base electrode of the IGBT Q2 is electrically connected with the single chip microcomputer, the emitter electrode of the IGBT Q2 is electrically connected with the positive electrode end of the tested storage battery pack through the inductor L1, the switch K1 and the resistor Rs in sequence, the emitter electrode of the IGBT Q2 is also electrically connected with the collector electrode of the IGBT Q1, the base electrode of the IGBT Q1 is electrically connected with the single chip microcomputer, and the emitter electrode of the IGBT Q1 is electrically connected with the negative electrode end of the tested storage battery pack. The single chip microcomputer is STM32F103C8T6, and the IGBT Q1 and the IGBT Q2 are made of British flying IKW75N65EH 5.
The utility model discloses an in the embodiment, storage battery charge-discharge test circuit still includes first electric capacity subassembly and second electric capacity subassembly, and the positive pole of first electric capacity subassembly and switch K1 and switch K4's common terminal electricity are connected, and the negative pole of first electric capacity subassembly is connected with the negative pole end electricity of being surveyed storage battery. The anode of the second capacitor assembly is electrically connected with the built-in AC/DC power supply module through a switch K2, and the cathode of the second capacitor assembly is electrically connected with the built-in AC/DC power supply module through a switch K3.
Specifically, the first capacitor assembly comprises a capacitor EC1 and a capacitor EC2 which are connected in series, the positive electrode of the capacitor EC1 is electrically connected with the common end of a switch K1 and a switch K4, the negative electrode of the capacitor EC2 is electrically connected with the negative electrode end of the tested battery pack, the second capacitor assembly is a capacitor EC3, the positive electrode of the capacitor EC3 is electrically connected with the built-in AC/DC power supply module through a switch K2, and the negative electrode of the capacitor EC3 is electrically connected with the built-in AC/DC power supply module through a switch K3.
The provided storage battery pack charging and discharging test circuit can further comprise an external power supply or an external load, and the external power supply or the external load is electrically connected with the positive electrode of the second capacitor assembly through a switch K2.
Here, it should be noted that, in the battery pack charge/discharge test circuit provided in fig. 3, when the switches K1, K2, and K3 are closed and the switch K4 is opened, the battery pack charge test circuit in fig. 1 is obtained, and at this time, the single chip microcomputer does not output the pulse control signal PWM1 to the IGBT Q1. Similarly, in the battery charging and discharging test circuit provided in fig. 3, when the switches K1 and K4 are closed and the switches K2 and K3 are opened, the battery discharging test circuit in fig. 2 can be obtained, and at this time, the single chip microcomputer does not output the pulse control signal PWM2 to the IGBTQ 2.
The charging and discharging test circuit for the storage battery pack has four working modes, namely an internal power supply charging mode, an internal resistance load discharging mode, an external power supply charging mode and an energy-saving discharging mode.
The working principle of the charging mode of the built-in power supply is as follows: in this mode of operation, switches K1, K2, and K3 are all closed, switch K4 is open, the internal AC/DC power module is powered by the AC input voltage (LA, LB, LC, N), and the output voltage of the internal AC/DC power module is DC 48V. The positive end and the negative end of the built-in AC/DC power supply module respectively provide working voltage for the capacitor EC3 and the IGBT Q2 through the switch K2 and the switch K3, the single chip outputs a pulse driving control signal PWM2 to excite the base of the IGBT Q2 (the type of the IGBTQ2 is British IKW75N65EH5), then the emitter of the IGBT Q2 charges the tested storage battery through the inductor L1 and the switch K1, the IGBT Q2 is used for follow current of the inductor L1, and the resistor Rs is used for detecting charging current. The voltage converted by the built-in AC/DC power supply module is fixed DC48V, the duty ratio of the pulse driving signal PWM2 is adjusted by the single chip microcomputer, the batteries to be tested with different voltages can be charged, the charging voltage range is from 2V to 280V, and the maximum charging current can reach 150A.
The working principle of the built-in resistor load discharging mode is that in the working mode, the switch K1 and the switch K4 are closed, the switch K2 and the switch K3 are opened, and the voltage of the detected storage battery pack supplies power to the capacitor EC1, the capacitor EC2, the inductor L1 and the IGBT Q1 through the resistor Rs and the switch K1. The single chip microcomputer outputs a pulse driving control signal PWM1 to excite the base of an IGBT Q1 (the signal of the IGBT Q1 is an England IKW75N65EH5), the collector of the IGBT Q1 drives an IGBT Q2 to transfer energy to a resistor R1, and the resistor R1 can be understood as a discharging load resistor. The input voltage is the tested storage battery pack, the single chip microcomputer is used for adjusting the duty ratio of the pulse driving control signal PWM1 to control different discharge currents of the storage battery packs with different voltages, the discharge current can be detected through the resistor Rs, the discharge voltage range is from 2V to 280V, and the maximum discharge current can reach 150A.
The working principle of the external power supply charging mode is as follows: in the working mode, the switches K1, K2 and K3 are all closed, the switch K4 is opened, and the external power supply BATC + supplies working voltage to the capacitor EC3 and the IGBT Q2 through the switch K2 and the switch K3. The single chip outputs a pulse driving control signal PWM2 to excite the base of the IGBT Q2 (the signal of the IGBT Q2 is British Ling IKW75N65EH5),
and then the emitter of IGBT Q2 charges the storage battery through inductance L1 and switch K1, IGBT Q2 is used for inductance L1 freewheeling, and resistance Rs is used for detecting charging current. The input voltage is fixed DC48V, the duty ratio of the pulse driving signal PWM2 is adjusted through the singlechip, the batteries to be tested with different voltages can be charged, the charging voltage range is from 2V to 280V, and the maximum charging current can reach 150A.
The working principle of the energy-saving discharge mode is as follows: in the working mode, the switch K1 and the switch K2 are closed, the switch K3 and the switch K4 are opened, and the voltage of the detected storage battery pack supplies power to the capacitor EC1, the capacitor EC2, the inductor L1 and the IGBT Q1 through the resistor Rs and the switch K1. The single chip microcomputer outputs a pulse driving control signal PWM1 to excite the base electrode of an IGBT Q1 (the model of the IGBT Q1 is an England IKW75N65EH5), and the collector electrode of the IGBT Q1 drives an IGBT Q2 to transfer energy to an external load for the external load to work. At the moment, the input voltage is the battery pack to be detected, and the discharge current of the battery packs with different voltages is controlled by adjusting the duty ratio of the pulse driving control signal PWM1 through the single chip microcomputer. The discharge voltage range is from 2V to 280V, the maximum discharge current can reach 150A, and the discharge current is related to the load power of an external load.
The utility model provides a storage battery charging test circuit, under the mode of charging, singlechip output pulse control signal PWM2 drive IGBT Q2's base, IGBT Q2's projecting pole is in proper order through inductance L1 and resistance Rs for being surveyed storage battery and charge, the size of the duty cycle of pulse control signal PWM2 is adjusted through the singlechip, can charge to the survey storage battery of different voltages, same battery charging test circuit can charge and detect the charging current that corresponds to the storage battery of different grade voltages.
The utility model provides a storage battery test circuit that discharges, under the mode of discharging, and the storage battery voltage of being surveyed is inductance L1 and IGBT Q1 power supply through resistance Rs, singlechip output pulse control signal PWM1 drive IGBT Q1's base, IGBT Q1's collecting electrode passes through IGBT Q2 and gives resistance R1 with energy transfer, the size of the duty cycle through singlechip regulation pulse control signal PWM1, control the different discharge current of the storage battery of different voltages, same battery test circuit that discharges can be to the storage battery of different voltage grades test, and detect the discharge current that corresponds.
The utility model provides a storage battery charge and discharge test circuit can realize under the operating mode of four kinds of differences, to the test of charging and the test of discharging of the storage battery of different voltage levels, can the same storage battery charge and discharge test circuit of sharing, and need not to design a plurality of test circuit, can satisfy from the storage battery charge and discharge test of 2V up to 240V voltage levels, has effectively solved user's different voltage levels storage battery's charge and discharge test problem.
Finally, the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A charging test circuit for a storage battery pack is characterized by comprising a built-in AC/DC power supply module, an insulated gate bipolar transistor IGBT Q2, an inductor L1, a resistor Rs, a single chip microcomputer and the storage battery pack to be tested;
the input end of the built-in AC/DC power supply module is connected with an alternating current input voltage, the positive output end of the built-in AC/DC power supply module is electrically connected with the collector of the IGBT Q2, the negative output end of the built-in AC/DC power supply module is electrically connected with the emitter of the IGBT Q2 through the inductor L1, the inductor L1 is also electrically connected with a tested storage battery pack through the resistor Rs, and the base of the IGBT Q2 is electrically connected with the single chip microcomputer;
alternating current input voltage is converted into alternating current voltage with a fixed value through the built-in AC/DC power supply module, working voltage is provided for the IGBTQ2, the single chip microcomputer outputs a pulse control signal PWM2 to drive the base electrode of the IGBT Q2, and the emitter electrode of the IGBTQ2 sequentially passes through the inductor L1 and the resistor Rs to charge the battery pack to be tested.
2. The battery pack charge test circuit according to claim 1, further comprising a first capacitor assembly and a second capacitor assembly, wherein the positive terminal of the first capacitor assembly is connected to the common terminal of the inductor L1 and the capacitor Rs, and the negative terminal of the first capacitor assembly is electrically connected to the negative terminal of the battery pack under test;
the positive electrode of the second capacitor assembly is electrically connected with the positive electrode output end of the built-in AC/DC power supply module, and the negative electrode of the second capacitor assembly is electrically connected with the negative electrode output end of the built-in AC/DC power supply module.
3. The battery pack charging test circuit according to claim 1, wherein the built-in AC/DC power module is replaced with an external power supply, and an output terminal of the external power supply is electrically connected to a collector electrode of the IGBT Q2.
4. A storage battery discharge test circuit is characterized by comprising a tested storage battery, a resistor Rs, a resistor R1, an IGBTQ1, an IGBT Q2, an inductor L1 and a single chip microcomputer;
the positive terminal of the tested storage battery pack is electrically connected with one end of the resistor R1 through the resistor Rs, the other end of the resistor R1 is electrically connected with the collector of the IGBT Q2, the base of the IGBT Q2 is electrically connected with the single chip microcomputer, the emitter of the IGBT Q2 is electrically connected with the collector of the IGBT Q1, the base of the IGBT Q1 is electrically connected with the single chip microcomputer, the emitter of the IGBT Q1 is connected with the negative terminal of the tested storage battery pack, and the inductor L1 is connected between the resistor Rs, the collector of the IGBT Q1 and the common terminal of the emitter of the IGBT Q2;
the voltage of the detected storage battery pack supplies power to the inductor L1 and the IGBT Q1 through the resistor Rs, the single chip microcomputer outputs a pulse control signal PWM1 to drive the base electrode of the IGBT Q1, and the collector electrode of the IGBT Q1 transmits energy to the resistor R1 through the IGBT Q2.
5. The battery pack discharge test circuit according to claim 4, further comprising a first capacitor assembly and a second capacitor assembly, wherein the positive electrode of the first capacitor assembly is electrically connected to the common terminal of the resistor Rs and the resistor R1, and the negative electrode of the first capacitor assembly is electrically connected to the negative terminal of the battery pack under test; and two ends of the second capacitor assembly are respectively and electrically connected with two ends of the resistor R1.
6. The battery pack discharge test circuit according to claim 4, wherein the resistor R1 is replaced with an external load.
7. A charging and discharging test circuit for a storage battery pack is characterized by comprising a built-in AC/DC power supply module, an IGBT Q1, an IGBT Q2, an inductor L1, a resistor Rs, a resistor R1, a single chip microcomputer, switches K1, K2, K3 and K4;
the input end of the built-in AC/DC power supply module is connected with an alternating current input voltage, the positive output end of the built-in AC/DC power supply module is respectively and electrically connected with the collector of the IGBT Q2 and one end of the resistor R1 through the switch K2, the negative output end of the built-in AC/DC power supply module is electrically connected with the other end of the resistor R1 through the switch K3 and the switch K4, the base of the IGBT Q2 is electrically connected with the single chip microcomputer, the emitter of the IGBT Q2 is electrically connected with the positive end of the tested storage battery pack sequentially through the inductor L1, the switch K1 and the resistor Rs, the emitter of the IGBT Q2 is also electrically connected with the collector of the IGBT Q1, the base of the IGBT Q1 is electrically connected with the single chip microcomputer, and the emitter of the IGBT Q.
8. The battery pack charge and discharge test circuit of claim 7, further comprising a first capacitive component and a second capacitive component;
the positive electrode of the first capacitor assembly is electrically connected with the common end of the switch K1 and the switch K4, and the negative electrode of the first capacitor assembly is electrically connected with the negative electrode end of the battery pack to be tested;
the positive electrode of the second capacitor assembly is electrically connected with the built-in AC/DC power supply module through the switch K2, and the negative electrode of the second capacitor assembly is electrically connected with the built-in AC/DC power supply module through the switch K3.
9. The battery pack charging and discharging test circuit according to claim 7, further comprising an external power supply or an external load, wherein the external power supply or the external load is electrically connected with the positive electrode of the second capacitor assembly through the switch K2.
10. The storage battery charging and discharging test circuit according to claim 7, wherein the single chip microcomputer is STM32F103C8T 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920952647.2U CN210665978U (en) | 2019-06-24 | 2019-06-24 | Storage battery charging, discharging and charging and discharging test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920952647.2U CN210665978U (en) | 2019-06-24 | 2019-06-24 | Storage battery charging, discharging and charging and discharging test circuit |
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| CN210665978U true CN210665978U (en) | 2020-06-02 |
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| CN201920952647.2U Active CN210665978U (en) | 2019-06-24 | 2019-06-24 | Storage battery charging, discharging and charging and discharging test circuit |
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- 2019-06-24 CN CN201920952647.2U patent/CN210665978U/en active Active
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