Storage battery maintenance device with wide voltage and current output

Abstract

A storage battery maintenance device with wide voltage and current output comprises a charger module, an electric energy output end of the charger module is connected with a positive electrode P + and a negative electrode P-of a storage battery charge and discharge port, a plurality of discharge branches are connected between the positive electrode P + and the negative electrode P-of the storage battery charge and discharge port, and each discharge branch comprises a PTC resistor and an IGBT module which are connected in series. The PTC resistor is connected in parallel with a diode; the system further comprises a main controller, the output end of the main controller is electrically connected with the IGBT driving board, the IGBT driving board is connected with the IGBT module, and the IGBT driving board is further connected with the positive electrode P + and the negative electrode P-of the storage battery charging and discharging port. The utility model provides a storage battery maintenance device with wide voltage and current output, which can be integrated in a smaller volume, is light in weight and portable to move, and can automatically complete the whole constant-current and constant-voltage charging / discharging process after the charging / discharging parameters are set, so that the whole charging / discharging process is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of battery maintenance, in particular to a battery maintenance device with wide voltage and current output. Background Art

[0002] In addition to the normal service life cycle of batteries, some batteries often fail early due to the quality of the batteries themselves, such as defects in materials, structure, and process, as well as improper use. In order to verify the backup time and actual capacity of the battery pack and ensure the safe and stable operation of the system, it is necessary to conduct a capacity verification discharge test on the battery pack regularly or as needed, so as to find out the individual failed or nearly failed single cells early and replace them, ensure the reliability of the power supply of the whole battery pack, and evaluate the expected life of the whole battery pack. At present, most of the battery maintenance devices on the market are split chargers, dischargers or activators, and the technology of integrated battery maintenance devices is not yet mature. Split chargers, dischargers or activators are large in size and inconvenient to use. The existing integrated battery maintenance devices have a small adjustable range of output voltage and current, which cannot meet the daily maintenance needs of multi-voltage batteries and battery packs of different voltage levels. Therefore, we developed a battery maintenance device with wide voltage and current output, which is used to charge, discharge and activate groups of batteries (customizable number) at the same time. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a battery maintenance device with wide voltage and current output, which is used for simultaneously charging, discharging and activating a group of batteries (the number of which can be customized).

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a battery maintenance device with wide voltage and current output, including a charger module, the power output end of the charger module is connected to the positive electrode P+ and the negative electrode P- of the battery charging and discharging port, and a plurality of discharge branches are connected between the positive electrode P+ and the negative electrode P- of the battery charging and discharging port, and the discharge branch includes a PTC resistor and an IGBT module connected in series, and a diode is connected in parallel to the PTC resistor;

[0005] It also includes a main controller, the output end of the main controller is electrically connected to the IGBT drive board, the IGBT drive board is connected to the IGBT module, and the IGBT drive board is also connected to the positive electrode P+ and the negative electrode P- of the battery charging and discharging port.

[0006] Preferably, the main controller is also electrically connected to the touch display screen.

[0007] Preferably, the main controller is also electrically connected to a PT100 thermal resistor and a fan, the PT100 thermal resistor is used to detect the operating temperature of the IGBT module, and the fan is used to dissipate heat for the discharge branch.

[0008] Preferably, a CT current transformer is provided on the loop formed by the positive electrode P+ and the negative electrode P- of the battery charging and discharging port, and the CT current transformer is electrically connected to the main controller.

[0009] Preferably, a circuit breaker is provided on the loop formed by the positive electrode P+ and the negative electrode P- of the battery charging and discharging port.

[0010] Preferably, an audible and visual alarm module is provided between the positive electrode P+ and the negative electrode P- of the battery charging and discharging port.

[0011] Preferably, the AC220V power supply is supplied to the main controller via a 48V switching power supply.

[0012] The utility model provides a battery maintenance device with wide voltage and current output, which can be integrated in a small volume, is light in weight, and is portable. After the charge / discharge parameters are set, the entire constant current and constant voltage charge / discharge process is automatically completed, making the entire charge / discharge process safer. The present invention makes battery maintenance work simple and easy, greatly reduces the labor intensity of professional maintenance personnel, and also improves the scientificity and safety of battery charge / discharge testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a circuit topology diagram of the utility model. DETAILED DESCRIPTION

[0016] like Figure 1-2 As shown, a battery maintenance device with wide voltage and current output includes a charger module, wherein the power output end of the charger module is connected to the positive electrode P+ and the negative electrode P- of the battery charging and discharging port, and a plurality of discharge branches are connected between the positive electrode P+ and the negative electrode P- of the battery charging and discharging port, wherein the discharge branch includes a PTC resistor and an IGBT module connected in series, and a diode is connected in parallel to the PTC resistor;

[0017] It also includes a main controller, the output end of the main controller is electrically connected to the IGBT drive board, the IGBT drive board is connected to the IGBT module, and the IGBT drive board is also connected to the positive electrode P+ and the negative electrode P- of the battery charging and discharging port.

[0018] Preferably, the main controller is also electrically connected to the touch display screen.

[0019] Preferably, the main controller is also electrically connected to a PT100 thermal resistor and a fan, wherein the PT100 thermal resistor is used to detect the operating temperature of the IGBT module, and the fan is used to dissipate heat for the discharge branch. When the PT100 thermal resistor detects that the temperature of the discharge branch is too high, the fan is started to dissipate heat for it.

[0020] Preferably, a CT current transformer is provided on the loop formed by the positive electrode P+ and the negative electrode P- of the battery charging and discharging port, and the CT current transformer is electrically connected to the main controller.

[0021] Preferably, a circuit breaker is provided on the loop formed by the positive electrode P+ and the negative electrode P- of the battery charging and discharging port. The circuit breaker is used as a switch for charging and discharging.

[0022] Preferably, an audible and visual alarm module is provided between the positive electrode P+ and the negative electrode P- of the battery charging and discharging port. The audible and visual alarm module can set the upper and lower limits of the voltage of a single group or the entire group of batteries, and an alarm will be sounded when the limit is reached.

[0023] Preferably, the AC220V power supply is supplied to the main controller via a 48V switching power supply.

[0024] The utility model is specially designed for DC system battery packs to conduct verification charge / discharge experiments, capacity testing, rapid charging, battery activation and repair, daily maintenance of battery packs, and engineering acceptance charging and discharging. The instrument can adapt to batteries with nominal voltages of 2V, 6V, and 12V. The technical parameters are as follows: battery charging and discharging voltage range of the entire group: 10-300V; charging current range: 0-60A; discharging current range: 0-100A.

[0025] This embodiment is developed for a 20KW integrated charging and discharging machine. The electrical principle is shown in Figure 1 , main circuit topology see Figure 2 The discharge power consumption device adopts a new PTC ceramic module as the discharge load, which avoids the red-hot phenomenon and is safe, reliable and pollution-free. The charger module adopts the Tonghe Electronics TH20F10025C7 charging module. The device adopts pulse width modulation (PWM) technology and consists of a filter module, a rectifier module, an inverter module, and a power conversion module to achieve a maximum output power of 20KW.

[0026] This device requires an external single-phase AC220V as a working power supply, with a built-in charging module and IGBT +PTC thermistor. The charging module can be externally connected to single-phase AC220V or three-phase AC380V as a working power supply, and IGBT +PTC thermistor as a discharge load. The two charging and discharging ports are externally connected to the positive and negative poles of the battery.

[0027] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A battery maintenance device with wide voltage and current output, characterized in that: It includes a charger module, the power output end of the charger module is connected to the positive electrode P+ and the negative electrode P- of the battery charging and discharging port, and a plurality of discharge branches are connected between the positive electrode P+ and the negative electrode P- of the battery charging and discharging port, and the discharge branch includes a PTC resistor and an IGBT module connected in series, and a diode is connected in parallel to the PTC resistor; It also includes a main controller, the output end of the main controller is electrically connected to the IGBT drive board, the IGBT drive board is connected to the IGBT module, and the IGBT drive board is also connected to the positive electrode P+ and the negative electrode P- of the battery charging and discharging port.

2. A battery maintenance device with wide voltage and current output according to claim 1, characterized in that: The main controller is also electrically connected to the touch display screen.

3. A battery maintenance device with wide voltage and current output according to claim 1, characterized in that: The main controller is also electrically connected to a PT100 thermal resistor and a fan. The PT100 thermal resistor is used to detect the operating temperature of the IGBT module, and the fan is used to dissipate heat for the discharge branch.

4. A battery maintenance device with wide voltage and current output according to claim 1, characterized in that: A CT current transformer is provided on the loop formed by the positive electrode P+ and the negative electrode P- of the battery charging and discharging port, and the CT current transformer is electrically connected to the main controller.

5. The battery maintenance device with wide voltage and current output according to claim 1, characterized in that: A circuit breaker is provided on the loop formed by the positive electrode P+ and the negative electrode P- of the battery charging and discharging port.

6. The battery maintenance device with wide voltage and current output according to claim 1, characterized in that: An audible and visual alarm module is provided between the positive electrode P+ and the negative electrode P- of the battery charging and discharging port.

7. The battery maintenance device with wide voltage and current output according to claim 1, characterized in that: The AC220V power supply is supplied to the main controller via a 48V switching power supply.

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