CN2802739Y - Energy-saving battery charge-discharge system - Google Patents

Abstract

The utility model discloses an energy-saving battery charging and discharging system, which comprises a battery or a battery pack to be charged and discharged, a bidirectional constant current switching power supply and a charger; The constant current switching power supply is connected, the bidirectional constant current switching power supply is connected with the power storage device, and the power storage device is connected with the charger. The battery or battery pack that needs to be charged and discharged exchanges energy with the power storage device through a bidirectional constant current switching power supply. When charging, the power storage device charges the battery or battery pack to be charged and discharged through a bidirectional constant current switching power supply; , the battery or battery pack to be charged and discharged stores electrical energy in the power storage device through a bidirectional constant current switching power supply. When the power in the power storage device is insufficient, the charger uses the electric energy of the grid to supplement the power storage device with electric energy. The utility model can be used for activating and dividing the rechargeable battery.

Description

Energy-saving battery charging and discharging system

technical field

The utility model relates to a charging and discharging system, in particular to a charging and discharging system for charging and discharging rechargeable batteries.

Background technique

At present, most of the formation and capacity separation equipment of domestic rechargeable battery manufacturers use linear DC regulated power supplies for charging and discharging. The circuit block diagram is shown in Figure 1. When charging, the linear DC regulated power supply is used to input electric energy from the grid to charge the battery; when discharging, the battery energy is put into the resistor, which is lost by heat and grid energy. The characteristics of the linear DC regulated power supply are simple and intuitive circuit structure, good current stability, less ripple, and excellent linearity, but the biggest disadvantage of this kind of power supply is low efficiency and large heat generation. In this way, a large amount of heat is generated during battery charging and discharging. In this case, in order to ensure the ambient temperature of the formation and volume separation process, a certain number of cooling facilities must be equipped. Therefore, the use of such chemical formation and volume separation equipment requires high energy consumption and high production costs.

Contents of the invention

The purpose of the utility model is to overcome the shortcoming of large power loss of the currently used rechargeable battery forming and capacity distributing equipment, and provide an energy-saving battery charging and discharging system. This system can store the electric energy released by the battery during activation and capacity separation in another power storage device. When it is necessary to charge during the formation and capacity separation process, the electricity stored during discharge is used to charge the battery that needs to be charged, so as to achieve the purpose of making full use of electric energy and reducing heat emission. At the same time, the system uses switching power supply for charging and discharging, which has higher working efficiency than linear power supply and achieves the purpose of energy saving. The system uses a charger to supplement electric energy for the power storage device. The charger is powered by an external power grid and only supplements the electric energy lost by electronic devices and batteries during charging and discharging. The actual test data proves that this supplementary electric energy is very small compared with the electric energy lost in the old-fashioned formation and capacity dividing process, thus realizing the purpose of energy saving. The technical scheme that the utility model takes is:

Including the battery or battery pack to be charged and discharged, bidirectional constant current switching power supply and charger; also includes a power storage device; the battery or battery pack to be charged and discharged is connected to the bidirectional constant current switching power supply, and the bidirectional constant current switching power supply and power storage The device is connected, and the power storage device is connected with the charger.

The battery or battery pack that needs to be charged and discharged exchanges energy with the power storage device through a bidirectional constant current switching power supply. When charging, the power storage device charges the battery or battery pack to be charged and discharged through a bidirectional constant current switching power supply; , the battery or battery pack to be charged and discharged stores electrical energy in the power storage device through a bidirectional constant current switching power supply. When the power in the power storage device is insufficient, the charger uses the electric energy of the grid to supplement the power storage device with electric energy.

The energy-saving battery charging and discharging system described in the technical solution of the utility model is adopted. Due to the addition of a power storage device, the electric energy released by the rechargeable battery during discharge is collected and stored for reuse, and a bidirectional constant current with high efficiency is adopted. The switching power supply is used for charging and discharging. Therefore, the beneficial effects obtained are mainly reflected in:

1. The electric energy released by the battery to be charged and discharged is stored and reused during discharge, saving electric energy loss;

2. The high-efficiency bidirectional constant current switching power supply and switching power supply charger are adopted, which effectively utilizes electric energy and reduces electric energy loss;

3. Experiments have proved that the charging and discharging efficiency of the system can reach more than 85%;

4. Stable performance, safe and convenient operation. It not only realizes all the functions of the original formation and sub-container, but also improves the performance;

5. It greatly reduces the calorific value in the production process, lowers the ambient temperature, saves a lot of cooling air conditioners, and saves energy and air conditioning equipment investment;

6. The structure is simple, reasonable, compact, and small in size, which saves the production cost of the cabinet.

Description of drawings

Figure 1 is a schematic block diagram of the currently used formation cabinet circuit.

Fig. 2 is a circuit principle block diagram of the utility model.

Fig. 3 is the implementation circuit diagram of the utility model.

Fig. 4 is a schematic circuit diagram of another embodiment of the utility model.

In the figure: 1. Battery or battery pack to be charged and discharged, 2. Bidirectional constant current switching power supply, 3. Charger, 4. Power storage device, 5. Inductor, 6. Diode, 7. Field effect tube, 8. Control circuit.

Detailed ways

Embodiment 1: As shown in Figure 2, it includes a battery or battery pack 1 to be charged and discharged, a bidirectional constant current switching power supply 2 and a charger 3; it also includes a power storage device 4; the battery or battery pack 1 to be charged and discharged and The bidirectional constant current switching power supply 2 is connected, the bidirectional constant current switching power supply 2 is connected to the power storage device 4 , and the power storage device 4 is connected to the charger 3 . The power storage device 4 is an energy storage element, which may be a lead-acid battery, a lithium battery, a nickel-metal hydride battery and a capacitor, or a combination thereof. As shown in Figure 3, the charger 3 uses a 48V100A communication power supply; the power storage device 4 is a battery pack composed of four 12V100AH lead-acid batteries in series; the bidirectional constant current switching power supply 2 includes: an inductor 5, two fast recovery diodes 6. Two field effect transistors 7; the inductor 5 is a 1mH inductor, the fast recovery diode 6 is a MUR480 diode, the field effect transistor 7 is an IRFP460 field effect transistor, and the control circuit 8 is composed of a PWM control chip UC3842. The battery pack 1 to be charged and discharged is a series battery pack of 100 1800mAH Ni-MH batteries.

The working process of the energy-saving battery charging and discharging system described in the utility model in actual use is:

(1) At first, after the charger 3 utilizes external electric energy to fully charge the power storage device 4, it stops working;

(2) The power storage device 4 charges the battery or battery pack 1 to be charged to the required level through the bidirectional constant current switching power supply 2;

(3) When the battery or battery pack 1 to be charged needs to be discharged, the discharged electric energy is stored in the power storage device 4 through the bidirectional constant current switching power supply 2;

(4) When the battery or battery pack 1 to be charged needs to be charged and discharged again, under the control of the control circuit, repeat the working process (2) and (3);

(5) Since the system will consume energy, when the energy of the power storage device 4 drops to a certain level, the charger 3 uses external electric energy to supplement the lost electric energy for the power storage device 4 .

It can be seen from the working process that the external energy is only used to supplement the lost electric energy, so that the energy is fully utilized. The energy loss is mainly caused by the bidirectional constant current switching power supply 2, the battery to be charged or the battery pack 1 etc. generate heat during operation, therefore, the bidirectional constant current switching power supply 2 with high utilization efficiency can reduce this loss and achieve the purpose of energy saving . The utility model can be used for activating and dividing the rechargeable battery.

Embodiment 2: As shown in FIG. 4 , there are multiple batteries or battery packs 1 to be charged and discharged, and multiple bidirectional constant current switching power supplies 2 connected to the batteries or battery packs 1 to be charged and discharged. After they are connected in parallel, they share a charger 3 and a power storage device 4 . The structures not mentioned in this embodiment are the same as those in Embodiment 1.

Claims (5)

1. An energy-saving battery charging and discharging system, comprising a battery or a battery pack to be charged and discharged, a bidirectional constant current switching power supply and a charger; it is characterized in that: a power storage device is also included; the battery or battery pack to be charged and discharged is connected with the The bidirectional constant current switching power supply is connected, the bidirectional constant current switching power supply is connected with the power storage device, and the power storage device is connected with the charger. 2. The energy-saving battery charging and discharging system according to claim 1, characterized in that: said power storage device includes lead-acid batteries, lithium batteries, nickel-metal hydride batteries, nickel-cadmium batteries and capacitors, or a combination thereof constitute an energy storage device. 3. The energy-saving battery charging and discharging system according to claim 1, characterized in that: said batteries or battery packs to be charged and discharged include lead-acid batteries, lithium batteries, nickel-metal hydride batteries or units that need to be charged and discharged; It is a single section, and it can also be a multi-section connection in series or parallel connection or series and parallel connection. 4. The energy-saving battery charging and discharging system according to claim 1, wherein the charger is a switching power supply charger, and its input can be single-phase or three-phase commercial power. 5. The energy-saving battery charging and discharging system according to claim 1 or 2 or 3 or 4, characterized in that: the battery or battery pack to be charged and discharged is connected to the battery or battery pack to be charged and discharged A bidirectional constant current switching power supply for one or more groups.

Images