Parallel connection device of battery packs
A technology of battery packs and parallel connection, which is applied in the direction of battery circuit devices, circuit devices, collectors, etc., and can solve problems such as circulation loss, inconvenient application, and loss
Inactive Publication Date: 2012-05-23
卢昭正
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Problems solved by technology
[0003] 1. The battery E1 is connected in parallel with the battery E2, the battery E3 is connected in parallel with the battery E4, the battery E5 is connected in parallel with the battery E6, the battery E7 is connected in parallel with the battery E8, when charging, its E1 and E2 group, its E3 and E4 group, its E5 Compared with E6 group, both E7 and E8 groups will produce circulation loss
[0004] 2. From the connection in 1 above, it can be seen that when the battery pack is discharged to the load, a circulating current will also be generated between the two batteries connected in parallel, resulting in loss
[0005] 3. From the connection in the above 1, it can be known that when the battery pack is open without load, a circulating current will also be generated between the two batteries connected in parallel, and the power stored in the battery pack will be exhausted, causing inconvenience in application
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[0046] The battery pack parallel connection device of the present invention includes a control device, a first battery pack (i.e. battery pack EA) and a second battery pack (i.e. battery pack EB), and a field effect transistor or a PN junction diode or a Schott Based on the diode, the application control device identifies the battery pack in the charging state or discharging state, or drives the switch group, so that the battery can eliminate the circulation loss caused by the battery circulation under charging or discharging. The two battery packs are formed by connecting more than two batteries in series, and a connection between every two batteries in the first battery pack and every two batteries in the second battery pack is connected in series. A balancing circuit BC consisting of at least one field effect transistor
[0047] Such as figure 2 Shown is the first embodiment of the battery pack parallel connection device of the present invention. It can be seen from the f...
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The invention discloses a parallel connection device of battery packs, which comprises a control device, a first battery pack and a second battery pack, wherein both the battery packs are formed by connecting more than two batteries in series, and a balancing circuit is connected between the serial connection part of every two batteries in the first battery pack and the serial connection part of every two batteries in the second battery pack, and comprises at least one field effect transistor. The parallel connection device applies the control device to judge whether the battery packs are in a charging state or a discharging state, so when the batteries are charged or discharged, the current-circulation loss which is generated by the battery loop current is eliminated.
Description
technical field [0001] The invention relates to a parallel connection device of battery packs, in particular to a parallel connection device of battery packs which can improve the charging or discharging efficiency of batteries and reduce the circulation loss thereof. Background technique [0002] Such as figure 1 As shown, it is a known battery management integrated circuit (Battery Management IC, BMIC), such as commercially available bq29414, bq29419 (TI), AIC1804 and other integrated circuits, which have the following disadvantages: [0003] 1. The battery E1 is connected in parallel with the battery E2, the battery E3 is connected in parallel with the battery E4, the battery E5 is connected in parallel with the battery E6, the battery E7 is connected in parallel with the battery E8, when charging, its E1 and E2 group, its E3 and E4 group, its E5 Compared with the E6 group, both the E7 and E8 groups will produce circulation loss. [0004] 2. From the connection in 1 abo...
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IPC IPC(8): H02J7/00
Inventor 卢昭正
Owner 卢昭正