TWM521294U - Active balancing battery - Google Patents

Description

Active balanced battery

The present invention relates to a secondary battery that can be repeatedly charged/discharged. Further, in particular, an active balanced battery includes a plurality of chargers connected in parallel such that a plurality of battery packs are balancedly charged.

A storage battery includes a power storage unit and a management unit. The power storage unit is mainly composed of a plurality of battery groups connected in series. Each battery group is composed of a plurality of battery cells connected in series, and the management unit is composed of electronic circuits, the management unit and the storage battery. The unit is electrically connected, and the power storage unit is coupled to an external power device or a charging device by a power terminal, and the management unit is configured to control charging/discharging of the power storage unit.

When charging the battery, it is necessary to balance the charging of each battery pack to avoid overcharging the battery cells of the single battery pack, affecting the life of the battery core and the safety of charging. In order to avoid excessive charging of the battery core, the conventional battery has a balancing circuit. When the battery is charged, when the voltage of a certain battery pack reaches a preset saturation voltage value, the balance circuit consumes the power storage of the battery pack to prevent the battery cells constituting the battery pack from being overcharged until the voltage of each battery pack rises to a preset. The saturation voltage value stops charging the power storage unit.

The conventional battery uses a balancing circuit to consume the power of the battery pack that first reaches the saturation voltage value during charging, so that the charging of each battery pack is balanced, and although the battery core can be prevented from being overcharged, However, it also caused the power consumption of charging, and the utilization rate of power decreased.

The main purpose of the present invention is to provide an active balanced battery comprising a plurality of chargers connected in parallel such that a plurality of battery packs are balancedly charged to improve power utilization.

The present invention is an active balanced battery comprising a management unit, a plurality of single-string battery modules and a power terminal. 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 of the single-string battery modules respectively includes a charger and a battery pack. The DC end of the charger of each single-string battery module is electrically connected to the battery pack, and the AC ends of the chargers of the single-string battery modules are connected in parallel. Accordingly, the external AC power source supplies power to each charger through the power terminal, so that the chargers of the single-string battery modules charge the battery pack, and the single-string battery modules further form a power storage unit in series; 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 for detecting the voltage and temperature of each battery pack and transmitting the same to the processor. Detecting the obtained voltage value and temperature value, the control module includes a plurality of circuit switches for controlling circuit continuity between each single string battery module and the power terminal, and the processor detects the obtained voltage value based on the detection module and The temperature value outputs a signal to the control module, and the circuit switches of the control module are respectively activated to change the on/off state of the circuit between each single string battery module and the power terminal.

An active balanced battery as described above, wherein the battery pack is composed of a plurality of battery cells connected in parallel or in series.

Since the plurality of chargers are connected in parallel, the battery packs are respectively charged, and the power of the battery pack that reaches the saturation voltage value is not consumed, so that the battery packs can be balancedly charged and improved. Electricity utilization.

1‧‧‧Management Unit

11‧‧‧ Processor

12‧‧‧Detection module

13‧‧‧Control Module

2‧‧‧Single string battery module

21‧‧‧Charger

22‧‧‧Battery Pack

3‧‧‧Power terminals

4‧‧‧Power storage unit

41‧‧‧ battery core

The first figure is a circuit block diagram of the present embodiment.

As shown in the first figure, the embodiment of the active balancing battery includes a management unit 1, a plurality of single-string battery modules 2, and a power terminal 3. The management unit 1 is composed of electronic circuits, and each single string The battery module 2 and the power terminal 3 are respectively coupled to the management unit 1. Each of the single-string battery modules 2 includes a charger 21 and a battery pack 22, and the DC end of the charger 21 of each single-string battery module 2 The battery pack 22 is electrically connected, and the AC terminals of the chargers 21 of the single-string battery modules 2 are connected in parallel, and an external AC power source (not shown) passes through the power terminals 3 to the chargers 21 of the single-string battery modules 2. AC power is supplied, and the battery 21 is charged by the charger 21 of each single string battery module 2, the AC power source may be a generator or a commercial power, and the battery pack 22 is composed of a plurality of battery cells 41 in parallel, the battery pack 22 may alternatively be replaced by a single battery cell 41. The battery pack 22 may alternatively be replaced by a plurality of battery cells 41 connected in series, and each single-string battery module 2 is further connected in series to form a power 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 for detecting the voltage and temperature of each battery pack 22 . And transmitting the detected voltage value and temperature value to the processor 11, the control module 13 includes a plurality of circuit switches for controlling circuit continuity between the single string battery module 2 and the power terminal 3, and the processor 11 is based on The detection module 12 detects the obtained voltage value and the temperature value and outputs a signal to the control module 13. The circuit switches of the control module 13 are respectively activated to change between the single string battery module 2 and the power terminal 3. Circuit on/off status.

In the first embodiment, the power terminal 3 is coupled to an external AC power source (not shown), so that the power source can supply power to each single string battery module 2 through the power terminal 3, and the processor 11 outputs the signal. The circuit switch of the control module 13 is activated, and the single-string battery module 2 and the power terminal 3 respectively form a path state, and the charger 21 of each single-string battery module 2 respectively charges the battery pack 22, and detects the mode. The group 12 detects the voltage and temperature of each of the battery packs 22, and transmits the detected voltage value and temperature value to the processor 11.

When the voltage of any of the battery packs 22 rises to a saturation voltage value, the processor 11 outputs a signal to the control module 13 based on the detected voltage value of the detection module 12, so that the circuit switch of the control module 13 is activated. The single-string battery module 2 in which the group 22 is located forms an open circuit with the power terminal 3, stops charging the battery pack 22 whose voltage is a saturated voltage value, and the single-string battery module in which the battery pack 22 whose voltage value does not rise to the saturation voltage value is located. The group 2 maintains the path state with the power terminal 3, and the battery pack 22 whose voltage value does not rise to the saturation voltage value continues to be charged. When the voltage of each battery pack 22 is equal to the saturation voltage value, each single string battery module 2 and the power terminal Each of the three forms a disconnected state, and charging of the electric storage unit 4 is completed.

When the temperature of any of the battery packs 22 is equal to or greater than a preset safe temperature, the processor 11 outputs a signal to the control module 13 based on the detected temperature value of the detection module 12, so that the circuit switch of the control module 13 is activated. The single-string battery module 2 in which the battery pack 22 is located forms an open circuit with the power terminal 3, and stops charging the battery pack 22 whose temperature is equal to or greater than the safe temperature, thereby performing overheat protection and other battery packs having a temperature lower than the safe temperature. The single-string battery module 2 in which the 22 is located maintains the path state with the power terminal 3, and the battery pack 22 whose temperature is lower than the safe temperature continues to be charged.

Since the plurality of chargers 21 are connected in parallel, each of the battery packs 22 is charged separately, and when the voltage of any of the battery packs 22 rises to a saturation voltage, the battery pack 22 whose voltage is a saturated voltage value stops charging. When the other battery packs 22 continue to be charged, the battery packs 22 can be balancedly charged and the power utilization rate can be improved without consuming the power of the battery pack that first reaches the saturation voltage value.

1‧‧‧Management Unit

11‧‧‧ Processor

12‧‧‧Detection module

13‧‧‧Control Module

2‧‧‧Single string battery module

21‧‧‧Charger

22‧‧‧Battery Pack

3‧‧‧Power terminals

4‧‧‧Power storage unit

41‧‧‧ battery core

Claims (4)

An active balanced battery includes a management unit, a plurality of single-string battery modules, and a power terminal. The management unit is composed of an electronic circuit, and each single-string battery module and power terminals are respectively coupled to the management unit. The battery modules respectively comprise a charger and a battery pack, wherein the DC end of the charger of each single string battery module is electrically connected to the battery pack, and the AC ends of the chargers of the single string battery modules are connected in parallel, according to which The external AC power source supplies power to each charger through the power terminal, so that the chargers of the single-string battery modules charge the battery pack, and the single-string battery modules further form a power storage unit in series; 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 for detecting the voltage and temperature of each battery pack, and transmitting the detected voltage value and temperature to the processor The control module includes a plurality of circuit switches for controlling circuit continuity between the single-string battery modules and the power terminals, and the processor detects the obtained voltage value and temperature value based on the detection module to the control module. Output signal, switch control circuit according to the respective modules are actuated changing circuit ON / OFF state between the battery modules and a single string of power terminals. The active balanced battery of claim 1, wherein the battery pack is composed of a plurality of battery cells connected in parallel. The active balanced battery of claim 1, wherein the battery pack is composed of a plurality of battery cells connected in series. The active balanced battery of claim 1, wherein the battery pack is composed of a battery core.