Balanced charging circuit of serial batteries and apparatus thereof
A technology of equalizing charging and connecting batteries in series, applied in battery circuit devices, charge equalizing circuits, circuit devices, etc., can solve the problem that the same charging circuit cannot meet the switching use of series batteries, cannot ensure that series batteries share the same charging circuit, and the charging circuit structure is complex and other problems, to meet the needs of charging switching, improve safety and reliability, and achieve the effect of low cost
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no. 1 example
[0030] figure 1 It is a structural block diagram of the equalizing charging circuit for series batteries provided by the first embodiment of the present invention. The equalizing charging circuit for batteries in series is used for reliably and safely charging the battery pack 100 composed of at least two batteries in series, and has a simple structure and low cost. Please refer to figure 1 , The charging circuit of this embodiment includes: a control unit 10 , a switch unit 11 , a detection unit 12 , and a voltage detection unit 13 .
[0031] Specifically, the battery pack 100 includes a plurality of single cells T1-Tm (the first battery, the second battery to the m-th battery in sequence) whose positive and negative electrodes are connected in series.
[0032] The detection unit 12 is electrically connected with the control unit 10 and the switch unit 11, wherein the detection unit 12 includes a power element and a detector, and the detector of the detection unit 12 is use...
no. 2 example
[0041] figure 2 It is a structural block diagram of a balanced charging circuit for series batteries provided by the second embodiment of the present invention. Please refer to figure 2 ,in, figure 2 is in figure 1 improved on the basis of figure 2 and figure 1 The difference is that figure 2 The equalizing charging circuit for series connected batteries can also include a charging protection unit 15.
[0042] Specifically, the charging protection unit 15 is electrically connected to the control unit 10 and the battery pack 100, and the charging protection unit 15 is used to detect the voltage of each battery in the battery pack, and the detected voltage of each battery is greater than a preset voltage value When (the battery is fully charged), a notification signal is sent to the control unit 10. Preferably, the control unit 10 is further configured to provide a disconnection control signal to the switch unit 11 according to the notification signal sent by the cha...
no. 3 example
[0046] image 3 It is a structural block diagram of a balanced charging circuit for series-connected batteries provided by the third embodiment of the present invention. Please refer to image 3 ,in, image 3 is in figure 2 improved on the basis of image 3 and figure 2 The difference is that image 3 The equalizing charging circuit for the series batteries can also include an alarm device 40 and / or a display device 41 .
[0047] Specifically, the alarm device 40 is electrically connected with the control unit 10 .
[0048] Preferably, the control unit 10 is also used to send an alarm signal to the alarm device 40 when the charging current is greater than a preset current value or when the detected voltage of each battery is greater than a preset voltage value, and the alarm device 40 is used to signal to alarm. Wherein, the alarm device 40 may be a buzzer or an audible and visual alarm, which is used to emit light or sound for alarming.
[0049] The display device ...
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