CN205544386U - active battery balancing - Google Patents

Abstract

The utility model discloses an active balance battery, it contains a management unit, a plurality of single string battery module and a power terminal, wherein, the management unit comprises electronic circuit, each single string battery module and power terminal are coupled with the management unit respectively, each single string battery module contains a charger and a group battery respectively, the DC end and the group battery electric connection of the charger in each single string battery module, the AC end of the charger in each single string battery module is parallelly connected, each single string battery module further establishes ties and constitutes an electric power storage unit; the management unit comprises a processor, a detection module and a control module, wherein the detection module comprises a voltage detection circuit and a temperature detection circuit, the control module comprises a plurality of circuit switches, and the processor outputs signals to the control module according to the voltage value and the temperature value detected by the detection module so as to control each circuit switch in the control module and further switch the on/off state of the circuit between each single-string battery module and the power terminal.

Description

active battery balancing

technical field

The utility model relates to a rechargeable/dischargeable secondary battery, furthermore, especially to an active balance battery, the active balance battery includes a plurality of chargers connected in parallel, so that a plurality of battery packs can be charged in balance .

Background technique

An existing storage battery includes an electric storage unit and a management unit, wherein the electric storage unit is mainly composed of a plurality of battery packs connected in series, each battery pack is composed of a plurality of battery cells connected in series, and the management unit is composed of an electronic circuit. The management unit is electrically connected to the power storage unit, and the power storage unit is coupled to an external electric device or charging device through a power terminal, and the management unit is used to control charging/discharging of the power storage unit.

When the battery is charged, it is necessary to balance the charging of each battery pack to avoid overcharging of the battery cells of a single battery pack, which will affect the life of the battery core and the safety of charging. In order to avoid excessive charging of the battery core, a balance circuit, when the battery is charging, when the voltage of a certain battery pack reaches the preset saturation voltage value, the balance circuit consumes the stored electricity of the battery pack to prevent the battery cells in the battery pack from being overcharged until the voltage of each battery pack is uniform. When the voltage rises to the preset saturation voltage value, the charging of the electric storage unit is stopped.

The existing storage battery uses a balance circuit to consume the power of the battery pack that is first charged to the saturation voltage value during charging, so as to balance the charging of each battery pack. Although it can avoid excessive charging of the battery core, it also causes the power consumption of charging. utilization drops.

Contents of the invention

The main purpose of the utility model is to provide an active balance battery, which includes a plurality of chargers connected in parallel, so that a plurality of battery packs can be charged in balance and power utilization rate can be improved.

The active balance battery provided by the utility model includes a management unit, a plurality of single-string battery modules and a power terminal, wherein the management unit is composed of an electronic circuit, each single-string battery module and power terminals are respectively coupled with the management unit, each The single-string battery modules respectively include a charger and a battery pack. The DC terminals of the chargers in each single-string battery module are electrically connected to the battery pack, and the AC terminals of the chargers in each single-string battery module are connected in parallel. Accordingly, The external AC power source provides power to each charger through the power terminal so that the chargers in each single-string battery module charge the battery pack, and each single-string battery module is further connected in series to form an electric storage unit;

The management unit includes a processor, a detection module and a control module. The detection module includes a voltage detection circuit and a temperature detection circuit. The voltage detection circuit and the temperature detection circuit are used to detect the voltage and temperature of each battery pack respectively. Temperature and send the detected voltage value and temperature value to the processor. The control module includes multiple circuit switches. The circuit switch is used to control the on/off state of the circuit between each single string battery module and the power terminal. The processor The voltage value and temperature value detected by the detection module output signals to the control module to control the circuit switches of the control module, and then switch the on/off state of the circuit between each single-string battery module and the power terminal.

As for the aforementioned active balanced battery, the battery pack is composed of multiple battery cells connected in parallel or in series.

As in the active balanced battery mentioned above, the battery pack is composed of a battery core.

Since a plurality of chargers are connected in parallel, each battery pack is charged separately, without consuming the power of the battery pack that is first charged to the saturation voltage value, each battery pack can be charged in a balanced manner, and the power utilization rate is improved.

Description of drawings

FIG. 1 is a schematic diagram of a circuit block of an embodiment of the present invention.

Description of reference signs: 1-management unit; 11-processor; 12-detection module; 13-control module; 2-single battery module; 21-charger; 22-battery pack; 3-power terminal; 4- Electric storage unit; 41—battery core.

detailed description

As shown in Figure 1, an embodiment of the active balancing battery provided by the present invention includes a management unit 1, a plurality of single-string battery modules 2 and a power terminal 3, wherein the management unit 1 is composed of electronic circuits, and each unit The string battery modules 2 and the power terminals 3 are respectively coupled to the management unit 1, and each single string battery module 2 includes a charger 21 and a battery pack 22 respectively, and the DC terminal of the charger 21 in each single string battery module 2 is connected to the battery The groups 22 are electrically connected, the AC terminals of the chargers 21 in each single-string battery module 2 are connected in parallel, and the external AC power source (not shown in the figure) supplies the charger 21 in each single-string battery module 2 through the power terminal 3 AC power makes the charger 21 in each single-string battery module 2 charge the battery pack 22. The AC power source can be a generator or commercial power. The battery pack 22 is composed of a plurality of battery cores 41 connected in parallel. The battery pack 22 is also It can be composed of a single battery cell 41 , and the battery pack 22 can also be composed of multiple battery cells 41 connected in series, and each single string of battery modules 2 is further connected in series to form an electric storage unit 4 .

The management unit 1 includes a processor 11, a detection module 12 and a control module 13, the detection module 12 includes a voltage detection circuit and a temperature detection circuit, the voltage detection circuit and the temperature detection circuit are used to detect each The voltage and temperature of the battery pack 22 and send the detected voltage value and temperature value to the processor 11. The control module 13 includes a plurality of circuit switches, and the circuit switches are used to control the connection between each single string battery module 2 and the power terminal 3. In the on/off state of the circuit, the processor 11 outputs signals to the control module 13 according to the voltage value and temperature value detected by the detection module 12 to control each circuit switch in the control module 13, and then switch between each single string battery module 2 and the power supply. On/off status of the circuit between terminals 3.

Embodiment 1 When charging, connect the power terminal 3 to an external AC power source (not shown in the figure), so that the power source provides power to each single-string battery module 2 through the power terminal 3, and the processor 11 outputs a signal to control The circuit switch in the control module 13 forms a path state between each single-string battery module 2 and the power terminal 3, the chargers 21 in each single-string battery module 2 charge the battery pack 22 respectively, and the detection module 12 detects each The detected voltage and temperature of the battery pack 22 are sent to the processor 11 .

When the voltage of any battery pack 22 rises to the saturation voltage value, the processor 11 outputs a signal to the control module 13 according to the voltage value detected by the detection module 12 to control the circuit switch in the control module 13, where the battery pack 22 is located. An open circuit is formed between the single-string battery module 2 and the power terminal 3, and the charging of the battery pack 22 whose voltage reaches the saturation voltage value is stopped. The connection state between the terminals 3 is maintained, and the battery pack 22 whose voltage value has not risen to the saturation voltage value continues to be charged. The disconnected state is formed, and the charging of the electric storage unit 4 is completed.

When the temperature of any battery pack 22 is equal to or greater than the preset safety temperature, the processor 11 outputs a signal to the control module 13 according to the temperature value detected by the detection module 12 to control the circuit switch in the control module 13, the battery An open circuit is formed between the single-string battery module 2 where the group 22 is located and the power terminal 3, and the charging of the battery group 22 whose temperature is equal to or greater than the safe temperature is stopped to protect it from overheating; other battery groups 22 whose temperature is lower than the safe temperature are located The single-string battery module 2 is kept connected to the power terminal 3, and the battery pack 22 whose temperature is lower than the safe temperature is continuously charged.

Since multiple chargers 21 are connected in parallel, each battery pack 22 is charged separately. When the voltage of any battery pack 22 rises to the saturation voltage, the battery pack 22 whose voltage is the saturation voltage value stops charging, and the other battery packs 22 continue to charge. In this way, each battery pack 22 can be charged in a balanced manner without consuming the power of the battery pack charged to the saturation voltage value first, and the power utilization rate can be improved.

Claims (4)

1. An active balancing battery comprising a management unit, a plurality of single-string battery modules and a power terminal, characterized in that the management unit is composed of electronic circuits, and each single-string battery module and power terminals are respectively coupled to the management unit Each single-string battery module includes a charger and a battery pack, the DC terminals of the chargers in each single-string battery module are electrically connected to the battery pack, and the AC terminals of the chargers in each single-string battery module are connected in parallel. The external AC power source provides power to each charger through the power terminal so that the charger in each single-string battery module charges the battery pack, and each single-string battery module is further connected in series to form an electric storage unit; The management unit includes a processor, a detection module and a control module. The detection module includes a voltage detection circuit and a temperature detection circuit. The voltage detection circuit and the temperature detection circuit are used to detect the voltage and temperature of each battery pack respectively. Temperature and send the detected voltage value and temperature value to the processor. The control module includes multiple circuit switches. The circuit switch is used to control the on/off state of the circuit between each single string battery module and the power terminal. The processor The voltage value and temperature value detected by the detection module output signals to the control module to control the switches of each circuit in the control module, and then switch the on/off state of the circuit between each single string battery module and the power terminal. 2. The active balancing battery according to claim 1, wherein the battery pack is composed of multiple battery cells connected in parallel. 3. The active balancing battery according to claim 1, wherein the battery pack is composed of a plurality of battery cells connected in series. 4. The active balancing battery according to claim 1, wherein the battery pack is composed of a battery cell.