A battery system and a charging method
A technology of a battery system and charging method, which is applied in the direction of battery charging management, battery circuit device, battery parallel conversion, etc., can solve the problem that the vehicle cannot have the fast charging function, etc., and achieve the effect of expanding the charging voltage range.
Inactive Publication Date: 2018-12-21
BEIJING ELECTRIC VEHICLE
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[0004] The invention provides a battery system and a charging method, which are used to solve the problem in the prior art that a battery system with a lower voltage is installed, so that the vehicle cannot have a fast charging function
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[0036] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0037] Such as figure 1 As shown, the embodiment of the present invention provides a battery system, the battery system includes:
[0038] A plurality of battery packs 11 connected in sequence, wherein the positive pole of the first battery pack 11 is connected to the positive bus bar 12, and the negative pole of the tail battery pack 11 is connected to the negative bus bar 13;
[0039] A switching circuit 14 is arranged between two adjacent b...
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The invention provides a battery system and a charging method. The battery system comprises a plurality of battery packs connected in sequence, wherein the positive electrode of the battery pack at the head part is connected with the positive electrode bus bar, and the negative electrode of the battery pack at the tail part is connected with the negative electrode bus bar. A switch circuit is arranged between two adjacent battery pack, that switching circuit includes a first state and a second state, wherein, a switching circuit operating in the first state connects the two adjacent battery pack in series, and a switching circuit operating in the second state connects the two adjacent battery packs in parallel between a positive bus bar and a negative bus bar. By controlling the working state of the switching circuit, The connection relationship between battery packs in the battery system is switched between the series connection and the parallel connection, so that the charging voltage range of the battery system is enlarged, the battery system can withstand higher charging voltage, and the vehicle equipped with the battery system with lower voltage can also have the quick charging function.
Description
technical field [0001] The invention relates to the field of power battery charging, in particular to a battery system and a charging method. Background technique [0002] With the development of new energy vehicles in the world, electric vehicles have entered a stage of rapid development. As the use of electric vehicles becomes more and more widespread, people's needs for batteries are becoming more and more diverse, and the cost requirements are getting lower and lower. , while the cost is reduced, the performance requirements are gradually increasing. [0003] In order to meet market demand, based on cost considerations, many automobile companies have developed battery systems with a voltage range of 80-170V to meet market demand, but due to cost considerations, battery systems use cheaper metals than insulated gate bipolar transistors- The oxide semiconductor field effect transistor / silicon carbide module is used as the drive unit, which makes the maximum voltage of the...
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IPC IPC(8): H02J7/00
CPCH02J7/0022H02J7/0024
Inventor 李雄
Owner BEIJING ELECTRIC VEHICLE