Summary of the invention
The present invention provides a kind of low-temperature pre-heating device of battery, realizes low temperature environment to solve the problems, such as the prior art
Under battery is preheated.
The present invention provide in a kind of battery preheating device, including the first battery and the second battery, the first energy shifting circuit and
Shifting circuit in second energy, shifting circuit is in parallel with first battery in first energy, shifting circuit in second energy
It is in parallel with second battery, in first energy shifting circuit include the first inductance and first switch, first inductance and
First switch series connection, shifting circuit includes the second inductance and second switch in second energy, second inductance and the
Two switch series connection, first inductance and second inductance realize flux coupled by sharing the first magnetic core.
In a preferential embodiment of the invention, the battery preheating device includes multiple batteries and multiple energy transfers electricity
Road, shifting circuit is in parallel with the battery respectively in the energy, and the inductance of shifting circuit is by sharing in the two neighboring energy
One magnetic core makes shifting circuit in the energy realize flux coupled between any two.
In a preferential embodiment of the invention, first battery is connected with second battery.
In an of the invention preferential embodiment, first battery be second battery charging charging duration with it is described
Second battery is that the charging duration of first battery charging is equal.
In a preferential embodiment of the invention, when the first switch is closed, if the voltage of first battery is higher than institute
The voltage of the first inductance is stated, first battery provides electric energy for first inductance, if the voltage of first battery is lower than
The voltage of first inductance, first inductance are first battery charging.
When the second switch is closed, if the voltage of second battery is higher than the voltage of second inductance, described the
Two batteries provide electric energy for first inductance, described if the voltage of second battery is lower than the voltage of second inductance
Second inductance is second battery charging.
In a preferential embodiment of the invention, the first switch and second switch complementation conducting.
Compared to the prior art, battery preheating device structure of the invention is simple, and circuit loss is small, and battery pre-heating mean is easy
In Project Realization.
Specific embodiment
The technical solution in embodiment of the present invention will be clearly and completely described below, it is clear that described reality
The mode of applying is only some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts belongs to this
Invent the range of protection.
As shown in Figure 1, battery preheating device of the invention, including battery B1 and battery B2, shifting circuit 11 and energy in energy
Shifting circuit 12 in amount, shifting circuit 11 is in parallel with the battery B1 in the energy, shifting circuit 12 and the battery in the energy
B2 is in parallel, and when the battery B1 is battery charging B2, shifting circuit 11 absorbs the electric energy of the battery B1 in the energy, and
It is battery B2 charging via shifting circuit 12 in the energy, when the battery B2 is that the battery B1 charges, the energy transfer
Circuit 12 absorbs the electric energy of the battery B2, and is battery charging B1 via shifting circuit 11 in the energy.The battery B1 and
The battery B2 is the battery in same battery pack, it is preferred that the battery B1 and battery B2 is neighbouring and is connected in series.
Shifting circuit 11 includes that inductance L1 and switch S1, the inductance L1 and the switch S1 connect in the energy, described
Shifting circuit 12 includes that inductance L2 and switch S2, the inductance L2 and switch S2 connect in energy, the inductance L1 and the inductance
L2 shares magnetic core T1, realizes flux coupled, and transmit electric energy between the battery B1 and the battery B2.
When the switch S1 is closed, if the voltage of the battery B1 is higher than the voltage of the inductance L1, the battery B1 is
The inductance L1 provides electric energy, if the voltage of the battery B1 is lower than the voltage of the inductance L1, the inductance L1 is the electricity
Pond B1 charging.
When the switch S2 is closed, if the voltage of the battery B2 is higher than the voltage of the inductance L2, the battery B2 is
The inductance L2 provides electric energy, if the voltage of the battery B2 is lower than the voltage of the inductance L2, the inductance L2 is the electricity
Pond B2 charging.
The inductance L1 is identical with the turn ratio of the inductance L2.
The switch S1 and switch S2 complementation conducting.
Fig. 2 is the second embodiment of the present invention, and the battery preheating device includes shifting circuit in n battery and n energy,
Shifting circuit 21-n is in parallel with the battery B1-n respectively in the energy, and the inductance of shifting circuit passes through in the two neighboring energy
A magnetic core is shared, shifting circuit in the energy is made to realize flux coupled between any two.Shifting circuit includes inductance Ln in the energy
It connects with switch Sn, the inductance Ln and the switch Sn, shifting circuit includes inductance Ln-1 and switch Sn-1, institute in the energy
Inductance Ln-1 and switch Sn-1 series connection is stated, the inductance Ln-1 and the inductance Ln share magnetic core T n-1, realize magnetic circuit coupling
It closes, and transmits electric energy between the battery Bn and the battery Bn-1.Wherein n is the natural number greater than 1.
It refer again to Fig. 3, the 3rd embodiment of battery preheating device of the invention, unlike embodiment illustrated in fig. 1,
In the embodiment, the switch S1 and the switch S2 are connected to the intermediate series connection point of the battery B1 and the battery B2, electricity
Hold C parallel connection and switch S1 and the two sides the switch S2.The capacitor C plays buffer action, prevents the battery B1 and the electricity
Pond B2 is short-circuited.Meanwhile capacitor C plays lossless clamped effect, with guarantee the stress of the switch S1 and the switch S2 by
Control.
The switch S1 and switch S2 is controllable switch, such as IGBT, MOSFET, relay etc..
The beneficial effect of battery preheating device and method of the invention is:
It is lost small, preheating speed is fast, and circuit structure is simple.Control energy is released from the high battery of voltage toward the low battery of voltage
It puts.
The above description of the embodiment is only used to help understand the method for the present invention and its core ideas.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvements and modifications also fall within the scope of protection of the claims of the present invention.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.