KR20160057787A - Voltage variable type battery module - Google Patents

Abstract

The present invention relates to a voltage variable type battery module. According to the present invention, the voltage variable type battery module includes: a first battery cell; a second battery cell; a third battery cell; a fourth battery cell; a first switch unit closing or opening a positive electrode of the first battery cell and a positive electrode of the second battery cell; a second switch unit closing or opening a negative electrode of the first battery cell and a negative electrode of the second battery cell; a third switch unit closing or opening the negative electrode of the first battery cell and the positive electrode of the second battery cell; a fourth switch unit closing or opening a positive electrode of the third battery cell and a positive electrode of the fourth battery cell; a fifth switch unit closing or opening a negative electrode of the third battery cell and a negative electrode of the fourth battery cell; a sixth switch unit closing or opening the negative electrode of the third battery cell and the positive electrode of the fourth battery cell; a positive electrode output unit connected between the first battery cell and the first switch unit; a negative electrode output unit connected between the fourth battery cell and the fifth switch unit; and a control unit controlling the first, second, third, fourth, fifth, or sixth switch unit, thereby maximizing driving motor efficiency.

Description

[0001] VOLTAGE VARIABLE TYPE BATTERY MODULE [0002]

The present invention relates to a voltage-variable battery module, and more particularly, to a voltage-variable battery module that includes four battery cells for generating half of a battery voltage and half of a battery current, and four battery cells connected in series or in parallel To a voltage variable type battery module capable of converting the battery module into a low voltage large current mode or a high voltage low current mode by controlling the six switch parts with a control part.

FIG. 1 is a block diagram showing a drive system of an electric vehicle, and FIG. 2 is a block diagram showing a drive system of a hybrid electric vehicle.

Referring to FIGS. 1 and 2, a driving system of an electric vehicle (EV) includes a motor, an inverter for driving the motor, and a battery as a voltage / current source. The electric vehicle drives an automobile using only a motor without an engine. In the case of a hybrid electric vehicle (HEV), an electric motor supports an engine by using a motor and an engine.

3 is a perspective view showing a conventional battery pack, FIG. 4 is a conceptual view showing a unit battery module constituting a battery pack according to the related art, FIG. 5 is a schematic view showing the characteristics of a driving motor in an electric vehicle or a hybrid electric vehicle FIG. 6 is a diagram showing a magnetic flux of a permanent magnet in a drive motor in an electric vehicle or a hybrid electric vehicle, and FIG. 7 is a block diagram showing a conventional battery module.

3 to 7, the electric vehicle EV or the hybrid electric vehicle HEV uses a nickel-hydrogen or nickel-ion battery, and the nickel-hydrogen or nickel-ion battery uses the same voltage One battery pack 10 in which a plurality of battery cells 11, 12, 13, and 14 having current capacitances are connected in series or in parallel is used to provide a voltage to the motor and the inverter.

 The drive motor for an electric vehicle (EV) or a hybrid electric vehicle (HEV) includes a constant torque section 20 requiring low speed / high torque and a constant output section (weak field section) requiring high speed / (30). At this time, the driving motor can be operated within the battery voltage level 15. [

In order to achieve high torque and efficiency in the constant torque section (low speed / high torque) 20, the counter electromotive force is designed to be high to increase the current-to-torque ratio. That is, since the torque is proportional to the magnitude of the counter electromotive force, the higher the counter electromotive force, the higher the torque can be obtained.

In order to achieve high speed and efficiency in the constant output period (high speed / low torque) 30, a counter electromotive force is designed to be low to reduce the speed to voltage ratio. At this time, the drive motor voltage should not exceed the motor maximum voltage in consideration of the battery voltage. That is, since the speed is proportional to the counter electromotive force, the lower the counter electromotive force is, the higher the speed can be obtained.

However, since the drive motor must be designed to satisfy the performance in all the sections, that is, the constant torque section 20 and the constant output section 30, there is a problem that control for generating an appropriate counter electromotive force in accordance with the section is required. Particularly, in the constant output section 30, weak field control is required to lower the driving motor voltage. Here, the weak field control is a control method for reducing the back electromotive force by canceling the magnetic flux (d-axis magnetic flux) of the permanent magnet by the magnetic flux by the armature current. The control method is used for satisfying the voltage condition in the constant output section 30, (D-axis current) in addition to the current (mainly the q-axis current) to be applied to the output terminal.

As described above, the electric motor or the hybrid electric vehicle using the drive motor must drive the motor and the inverter with a constant voltage of the battery pack 10, so that the voltage of the motor is limited by the voltage of the battery pack 10 have. If the number of turns is increased in order to satisfy the performance of the drive motor in the constant torque section 20, the coil loss increases due to the field control current in the constant output section 30, And the output performance of the optical disk is not satisfied. In addition, if the number of turns is reduced to satisfy the constant output range performance (30), a high current is required to be input in the constant torque section (20) There is a problem that can not be satisfied.

Therefore, since the battery module of the prior art battery pack must satisfy both the low-speed high torque mode in the above-mentioned constant-torque section 20 and the high-speed low-torque mode in the above-mentioned constant output section 30, It is impossible to design the optimum number of turns of the drive motor.

KR 139434 B1

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems and it is an object of the present invention to convert a battery module into a low voltage large current mode to drive the drive motor at a high torque, The present invention is to provide a voltage-variable battery module capable of maximizing the efficiency of the drive motor by driving the drive motor at a high speed by calling the battery module in a high-voltage low-current mode when the used vehicle runs in a constant output section have.

In order to achieve the above object, a first embodiment of a voltage-variable type battery module according to the present invention includes: a first battery cell for generating a half of a battery voltage and a half of a battery current; A second battery cell that generates a half voltage of the battery voltage and a half current of the battery current; A third battery cell generating a half of a voltage of the battery voltage and a half current of the battery current and having an anode connected to a cathode of the second battery cell; A fourth battery cell that generates half of the battery voltage and half of the battery current; A first switch unit for closing or opening the anode of the first battery cell and the anode of the second battery cell; A second switch unit for closing or opening the cathode of the first battery cell and the cathode of the second battery cell; A third switch connected in parallel to the first battery cell and the second battery cell and closing or opening the anode of the first battery cell and the anode of the second battery cell; A fourth switch unit for closing or opening the anode of the third battery cell and the anode of the fourth battery cell; A fifth switch for closing or opening the cathode of the third battery cell and the cathode of the fourth battery cell; A sixth switch connected in parallel to the third battery cell and the fourth battery cell and closing or opening the anode of the third battery cell and the anode of the fourth battery cell; A positive polarity output unit connected between the first battery cell and the first switch unit; A cathode output connected between the fourth battery cell and the fifth switch unit; And a control unit for controlling the first, second, third, fourth, fifth, or sixth switch unit; . ≪ / RTI >

At this time, the control unit closes the first switch unit, the second switch unit, the fourth switch unit, and the fifth switch unit, and blocks the third switch unit and the sixth switch unit, To the low voltage high current mode.

In addition, the control unit may connect the third switch unit and the sixth switch unit to close the first switch unit, the second switch unit, the fourth switch unit, and the fifth switch unit, To the high voltage low current mode.

Here, the voltage-variable battery module may be constructed by connecting a plurality of the first embodiment of the voltage-variable battery module in parallel.

In order to achieve the above object, a second embodiment of a voltage-variable type battery module according to the present invention includes: a first battery cell for generating a half of a battery voltage and a half of a battery current; A second battery cell that generates a half voltage of the battery voltage and a half current of the battery current; A third battery cell generating a half of the battery voltage and a half current of the battery current and having a cathode connected to the anode of the second battery cell; A fourth battery cell that generates half of the battery voltage and half of the battery current; A first switch unit for closing or opening the anode of the first battery cell and the anode of the second battery cell; A second switch unit for closing or opening the cathode of the first battery cell and the cathode of the second battery cell; A third switch connected in parallel with the first battery cell and the second battery cell and closing or opening the anode of the first battery cell and the cathode of the second battery cell; A fourth switch unit for closing or opening the anode of the third battery cell and the anode of the fourth battery cell; A fifth switch for closing or opening the cathode of the third battery cell and the cathode of the fourth battery cell; A sixth switch unit connected in parallel to the third battery cell and the fourth battery cell and closing or opening the anode of the third battery cell and the cathode of the fourth battery cell; A positive polarity output unit connected between the fourth battery cell and the fourth switch unit; A cathode output connected between the first battery cell and the second switch unit; And a control unit for controlling the first, second, third, fourth, fifth, or sixth switch unit; . ≪ / RTI >

At this time, the control unit closes the first switch unit, the second switch unit, the fourth switch unit, and the fifth switch unit, and blocks the third switch unit and the sixth switch unit, To the low voltage high current mode.

In addition, the control unit may connect the third switch unit and the sixth switch unit to close the first switch unit, the second switch unit, the fourth switch unit, and the fifth switch unit, To the high voltage low current mode.

Here, the voltage variable type battery module may be constructed by connecting a plurality of the second embodiment of the voltage variable type battery module in parallel.

According to the voltage variable type battery module of the present invention, it is possible to provide a battery module capable of maximizing the efficiency of the drive motor regardless of whether the vehicle using the drive motor is in the constant torque section or the constant output section.

1 is a block diagram showing a driving system of an electric vehicle;
2 is a block diagram showing a drive system of a hybrid electric vehicle.
3 is a perspective view showing a battery pack according to the prior art.
4 is a conceptual view showing a unit battery module constituting a battery pack according to a related art;
5 is a diagram showing characteristics of a drive motor in an electric vehicle or a hybrid electric vehicle.
6 is a diagram showing the magnetic flux of a permanent magnet in a drive motor in an electric vehicle or a hybrid electric vehicle.
7 is a block diagram showing a conventional battery module.
FIG. 8 is a block diagram showing a first embodiment of a voltage-variable battery module according to the present invention; FIG.
9 is a block diagram showing a circuit connection when a low voltage high current mode is performed in the first embodiment of the voltage variable type battery module according to the present invention.
10 is a block diagram showing a circuit connection when a high-voltage low-current mode is performed in the first embodiment of the voltage-variable type battery module according to the present invention.
11 is a block diagram showing a second embodiment of a voltage-variable type battery module according to the present invention.
12 is a block diagram showing a circuit connection when a low voltage high current mode is performed in the second embodiment of the voltage variable type battery module according to the present invention;
13 is a block diagram showing a circuit connection when a high voltage low current mode is performed in the second embodiment of the voltage variable type battery module according to the present invention.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the invention. Also, the technical terms used herein should be interpreted in a sense that is generally understood by those skilled in the art to which the present disclosure relates, unless otherwise specifically defined in the present specification, Or shall not be construed to mean excessively reduced. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. But is to be understood as including all modifications, equivalents, and alternatives falling within the scope of the appended claims.

Hereinafter, a first embodiment of a voltage-variable battery module according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 8 is a block diagram showing a first embodiment of a voltage-variable type battery module according to the present invention. FIG. 9 is a circuit diagram showing a voltage-variable type battery module according to a first embodiment of the present invention. 10 is a block diagram showing a circuit connection when the high voltage low current mode is performed in the first embodiment of the voltage variable type battery module according to the present invention.

8 to 10, a first embodiment of the voltage-variable type battery module 2 according to the present invention includes a first battery cell 100, a second battery cell 200, a third battery cell 300, The fourth switch cell unit 400, the first switch unit 500, the second switch unit 600, the third switch unit 700, the fourth switch unit 800, the fifth switch unit 900, 6 switch unit 1000, a positive electrode output unit 1100, a negative electrode output unit 1200, and a control unit 1300.

The first battery cell 100 generates a half voltage of the battery voltage 3 and a half current of the battery current 4. [ That is, the first battery cell 100 is controlled by the control unit 1300 such that the voltage of the battery module 2 or the current of the battery module 2 is 1/2 or It is possible to generate 1/2 current of the battery current (4). The battery voltage 3 may be a voltage of the battery module 2 composed of the battery cells 100, 200, 300 and 400 or a voltage of the battery module 1 composed of a plurality of the battery modules 2, Lt; / RTI > Here, the battery current 4 is a current of the battery module 2 composed of the battery cells 100, 200, 300 and 400 or a battery module 2 composed of a plurality of the battery modules 2 1). ≪ / RTI > In particular, the half voltage of the battery voltage 3 may be 4V, and the half current of the battery current 4 may be 3 Ah. That is, the battery voltage 3 may be 8V and the battery current 4 may be 6Ah. The battery voltage 3 or the battery current 4 may vary depending on the battery voltage or current of the automobile using the motor and the limitation of the size of the battery voltage 3 or the size of the battery current 4 none.

The second battery cell 200 generates a 1/2 voltage of the battery voltage 3 and a 1/2 current of the battery current 4. That is, the second battery cell 200 is controlled by the control unit 1300 so that the voltage of the battery module 2 or the current of the battery module 2 is reduced to 1/2 or 3/4 of the battery voltage 3, It is possible to generate 1/2 current of the battery current (4). The battery voltage 3 may be a voltage of the battery module 2 composed of the battery cells 100, 200, 300 and 400 or a voltage of the battery module 1 composed of a plurality of the battery modules 2, Lt; / RTI > Here, the battery current 4 is a current of the battery module 2 composed of the battery cells 100, 200, 300 and 400 or a battery module 2 composed of a plurality of the battery modules 2 1). ≪ / RTI > In particular, the half voltage of the battery voltage 3 may be 4V, and the half current of the battery current 4 may be 3 Ah. That is, the battery voltage 3 may be 8V and the battery current 4 may be 6Ah. The battery voltage 3 or the battery current 4 may vary depending on the battery voltage or current of the automobile using the motor and the limitation of the size of the battery voltage 3 or the size of the battery current 4 none.

The third battery cell 300 generates a half voltage of the battery voltage 3 and a half current of the battery current 4 and the anode 310 generates a negative current of the negative electrode of the second battery cell 200 220). That is, the third battery cell 300 may be controlled by the control unit 1300 such that the voltage of the battery module 2 or the current of the battery module 2 is 1/2 or It is possible to generate 1/2 current of the battery current (4). In the third battery cell 300, the anode 310 of the third battery cell 300 may be connected to the cathode 220 of the second battery cell 300. The battery voltage 3 may be a voltage of the battery module 2 composed of the battery cells 100, 200, 300 and 400 or a voltage of the battery module 1 composed of a plurality of the battery modules 2, Lt; / RTI > Here, the battery current 4 is a current of the battery module 2 composed of the battery cells 100, 200, 300 and 400 or a battery module 2 composed of a plurality of the battery modules 2 1). ≪ / RTI > In particular, the half voltage of the battery voltage 3 may be 4V, and the half current of the battery current 4 may be 3 Ah. That is, the battery voltage 3 may be 8V and the battery current 4 may be 6Ah. The battery voltage 3 or the battery current 4 may vary depending on the battery voltage or current of the automobile using the motor and the limitation of the size of the battery voltage 3 or the size of the battery current 4 none.

The fourth battery cell 400 generates a half voltage of the battery voltage 3 and a half current of the battery current 4. [ That is, the fourth battery cell 400 is controlled by the control unit 1300 so that the voltage of the battery module 2 or the current of the battery module 2 is reduced to 1/2 or 3/4 of the battery voltage 3, It is possible to generate 1/2 current of the battery current (4). The battery voltage 3 may be a voltage of the battery module 2 composed of the battery cells 100, 200, 300 and 400 or a voltage of the battery module 1 composed of a plurality of the battery modules 2, Lt; / RTI > Here, the battery current 4 is a current of the battery module 2 composed of the battery cells 100, 200, 300 and 400 or a battery module 2 composed of a plurality of the battery modules 2 1). ≪ / RTI > In particular, the half voltage of the battery voltage 3 may be 4V, and the half current of the battery current 4 may be 3 Ah. That is, the battery voltage 3 may be 8V and the battery current 4 may be 6Ah. The battery voltage 3 or the battery current 4 may vary depending on the battery voltage or current of the automobile using the motor and the limitation of the size of the battery voltage 3 or the size of the battery current 4 none.

The first switch unit 500 closes or opens the anode 110 of the first battery cell 100 and the anode 210 of the second battery cell. More specifically, the first switch unit 500 is connected in series between the anode 110 of the first battery cell 100 and the anode 210 of the second battery cell 100, The anode 110 of the first battery cell 100 and the anode 210 of the second battery cell may be closed or opened. Here, the first switch unit 500 may be a switch device for connecting or disconnecting a voltage or a current, and there is no limitation on the type of the switch device.

The second switch unit 600 closes or opens the cathode 120 of the first battery cell and the cathode 220 of the second battery cell. More specifically, the second switch unit 600 is connected in series between the cathode 120 of the first battery cell 100 and the cathode 220 of the second battery cell 100, The cathode 120 of the first battery cell 100 and the cathode 220 of the second battery cell 200 may be closed or opened. Here, the second switch unit 600 may be a switch device for connecting or disconnecting a voltage or a current, and there is no limitation on the type of the switch device.

The third switch unit 700 is connected in parallel with the first battery cell and the second battery cell, and connects the cathode of the first battery cell and the anode of the second battery cell, ). More specifically, the third switch unit 700 is connected in series between the cathode 120 of the first battery cell 100 and the anode 210 of the second battery cell 100, The cathode 120 of the first battery cell 100 and the anode 210 of the second battery cell 200 may be closed or opened. That is, the first and second switch units 500 and 600 are not connected between the cathode 120 of the first battery cell 100 and the anode 210 of the second battery cell, 700) are connected. Here, the third switch unit 700 may be a switch device that connects or disconnects a voltage or a current, and the type of the switch device is not limited.

The fourth switch unit 800 closes or opens the anode 310 of the third battery cell and the anode 410 of the fourth battery cell. More specifically, the fourth switch unit 800 is connected in series between the anode 310 of the third battery cell 300 and the anode 410 of the fourth battery cell, The anode 310 of the first battery cell 300 and the anode 410 of the fourth battery cell 400 may be closed or opened. Here, the fourth switch unit 800 may be a switch device for connecting or disconnecting a voltage or a current, and there is no limitation on the type of the switch device.

The fifth switch unit 900 closes or opens the cathode 320 of the third battery cell and the cathode 420 of the fourth battery cell. More specifically, the fifth switch unit 900 is connected in series between the cathode 320 of the third battery cell 300 and the cathode 420 of the fourth battery cell 400, The cathode 320 of the battery cell 300 and the cathode 420 of the fourth battery cell 400 may be closed or opened. Here, the fifth switch unit 900 may be a switch device for connecting or disconnecting a voltage or a current, and the type of the switch device is not limited.

The sixth switch unit 1000 is connected in parallel to the third battery cell 300 and the fourth battery cell 400 and is connected to the cathode 320 of the third battery cell and the anode 410) is closed (or opened). More specifically, the sixth switch unit 1000 is connected in series between the cathode 320 of the third battery cell 300 and the anode 410 of the fourth battery cell 300, The cathode 320 of the first battery cell 300 and the anode 410 of the fourth battery cell 400 may be closed or opened. That is, the fourth and fifth switch units 800 and 900 are not connected between the cathode 320 of the third battery cell 300 and the anode 410 of the fourth battery cell, 1000). Here, the sixth switch unit 1000 may be a switch device for connecting or disconnecting a voltage or a current, and there is no limitation on the type of the switch device.

The anode output unit 1100 is connected between the first battery cell 100 and the first switch unit 500. That is, the anode output unit 1100 can be branched from the circuit between the anode 110 of the first battery cell 100 and the first switch unit 500. The positive electrode output unit 1100 is connected in parallel to the positive electrode output unit of another battery module so that the battery module 2 including the positive electrode output unit 1100 and the battery module 1 ) Can be formed. Also, a load may be connected to the anode output unit 1100.

The cathode output unit 1200 is connected between the fourth battery cell 400 and the fifth switch unit 900. That is, the cathode output unit 1200 may be branched from the circuit between the cathode 420 of the fourth battery cell 400 and the fifth switch unit 900. The negative output unit 1200 is connected to the negative output unit of the other battery module in parallel so that the battery module 2 including the negative output unit 1200 and the battery module 2 including another battery module 2 So that the module 1 can be formed. Also, a load may be connected to the cathode output unit 1200.

The control unit 1300 controls the first, second, third, fourth, fifth, or sixth switch units 500, 600, 700, 800, 900, More specifically, the control unit 1300 controls the first, second, third, fourth, fifth, or sixth switch unit 500, 600, 700, 800, 900, 1000, The module 2 can be switched to the low voltage high current mode 5 or the high voltage low current mode 6.

More specifically, the control unit 1300 closes the first switch unit 500, the second switch unit 600, the fourth switch unit 800, and the fifth switch unit 900 The third switch unit 700 and the sixth switch unit 1000 may be opened to switch the battery module 2 to the low voltage large current mode 5. [ That is, when the voltage of the first, second, third, and fourth battery cells 100, 200, 300, 400 is 4 V and the current is 3 Ah, The voltage of the battery module 2 may be 8V and the current may be 6Ah. At this time, the operation mode of the vehicle including the battery module 2 may be a constant torque section 20 operation mode. That is, the control unit 1300 can switch the battery module 2 to the low voltage charging mode (5) when the operation mode of the vehicle is the constant torque period 20 operation mode.

The controller 1300 closes the third switch unit 700 and the sixth switch unit 1000 and connects the first switch unit 500, the second switch unit 600, The switch unit 800 and the fifth switch unit 900 can be opened to switch the battery module 2 to the high voltage low current mode 6. [ That is, when the voltages of the first, second, third, and fourth battery cells 100, 200, 300, and 400 are 4 V and the current is 3 Ah, The voltage of the battery module 2 may be 16V and the current may be 3Ah. At this time, the operation mode of the vehicle including the battery module 2 may be a constant output section 30 operation mode. That is, the controller 1300 can switch the battery module 2 to the high voltage low current mode 6 when the operation mode of the vehicle is the constant output period 30 operation mode.

In the first embodiment of the voltage-variable battery module 2 according to the present invention, a plurality of voltage-variable battery modules 1 may be connected in parallel. That is, in the first embodiment of the voltage-variable battery module 2, the positive output section 1100 and the negative output section 1200 are connected to the positive output section 1100 and the negative output section 1200 of the other voltage- So that one voltage-variable battery module 1 can be formed. Here, the number of the voltage-variable battery modules 2 to be coupled is not limited and may be connected in parallel with another embodiment of the voltage-variable battery module 2 to form one voltage-variable battery module 1.

3, 4, 5, or 6 switch units 500, 600, 700, 800, 900 included in the respective voltage-variable battery modules 2, the control unit 1300 controls the first, The battery module 1 can be switched to the low voltage high current mode (5) or the high voltage low current mode (6) by simultaneously controlling the battery module (1000).

More specifically, the control unit 1300 controls the first switch unit 500, the second switch unit 600, the fourth switch unit 800, and the fifth switch unit 600 included in the voltage variable type battery module 2, The third switch unit 700 and the sixth switch unit 1000 are opened and the battery module 1 is switched to the low voltage large current mode 5 by closing the switch unit 900 You can. That is, the control unit 1300 can switch the battery module 1 to the low voltage charging mode (5) when the operation mode of the vehicle is the constant torque period (20) operation mode. If the voltage of the first, second, third, and fourth battery cells 100, 200, 300, 400 is 4 V and the current is 3 Ah, The voltage of module 1 may be 8V and the current may be 6Ah.

The control unit 1300 closes the third switch unit 700 and the sixth switch unit 1000 included in each voltage variable battery module 2 and connects the first switch unit 500 The second switch unit 600, the fourth switch unit 800 and the fifth switch unit 900 are opened to switch the battery module 1 to the high voltage low current mode 6 You can. That is, the controller 1300 can switch the battery module 1 to the high voltage low current mode 6 when the operation mode of the vehicle is the constant output period 30 operation mode. Here, when the voltage of the first, second, third and fourth battery cells 100, 200, 300 and 400 is 4 V and the current is 3 Ah, The voltage of the battery module 1 may be 16V and the current may be 3Ah.

Hereinafter, a second embodiment of a voltage-variable battery module according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 11 is a block diagram showing a second embodiment of the voltage-variable battery module according to the present invention. FIG. 12 is a circuit diagram showing a voltage-variable battery module according to a second embodiment of the present invention. 13 is a block diagram showing a circuit connection when a high voltage low current mode is performed in the second embodiment of the voltage variable type battery module according to the present invention. In the configuration of this embodiment, the same reference numerals as those of the first embodiment of the present invention described above are used to refer to the reference numerals of Figs. 8 to 10, and a detailed description thereof will be omitted.

11 to 13, a second embodiment of the voltage-variable type battery module 2 according to the present invention includes a first battery cell 101, a second battery cell 201, a third battery cell 301, The fourth switch cell unit 401, the first switch unit 501, the second switch unit 601, the third switch unit 701, the fourth switch unit 801, the fifth switch unit 901, 6 switch unit 1001, a positive electrode output unit 1101, a negative electrode output unit 1201, and a control unit 1301. This embodiment is different from the first embodiment of the voltage-variable type battery module according to the present invention in that the third battery cell 301, the third switch portion 701, the sixth switch portion 1001, The first battery cell 101, the second battery cell 201, the fourth battery cell 401, the first switch unit 501, and the first switch unit 1101, the cathode output unit 1201, and the control unit 1301, The second switch portion 601, the fourth switch portion 801, and the fifth switch portion 901 are the same. Hereinafter, the third battery cell 301, the third switch unit 701, the sixth switch unit 1001, the positive output unit 1101, the negative output unit 1201, And the control unit 1301 will be described in more detail.

The third battery cell 301 generates a half voltage of the battery voltage 3 and a half current of the battery current 4 and the cathode 321 is connected to the anode 211 of the second battery cell . That is, the third battery cell 301 is controlled by the control unit 1301 so that the voltage of the battery module 2 or the current of the battery module 2 is reduced to 1/2 or 3/4 of the battery voltage 3, It is possible to generate 1/2 current of the battery current (4). In the third battery cell 301, the cathode 321 of the third battery cell 301 may be connected to the anode 211 of the second battery cell 301. Herein, the battery voltage 3 is a voltage of the battery module 2 composed of the battery cells 101, 201, 301 and 401 or a voltage of the battery module 1 composed of a plurality of the battery modules 2, Lt; / RTI > Here, the battery current 4 may be a current of the battery module 2 constituted by the battery cells 101, 201, 301, and 401 or a battery module 2 composed of a plurality of the battery modules 2 1). ≪ / RTI > In particular, the half voltage of the battery voltage 3 may be 4V, and the half current of the battery current 4 may be 3 Ah. That is, the battery voltage 3 may be 8V and the battery current 4 may be 6Ah. The battery voltage 3 or the battery current 4 may vary depending on the battery voltage or current of the automobile using the motor and the limitation of the size of the battery voltage 3 or the size of the battery current 4 none.

The third switch unit 701 is connected in parallel with the first battery cell 101 and the second battery cell 201 and is connected to the positive electrode 111 of the first battery cell and the negative electrode of the second battery cell 221) are connected (closed) or blocked (opened). More specifically, the third switch unit 701 is connected in series between the anode 111 of the first battery cell 101 and the cathode 221 of the second battery cell, The anode 111 of the first battery cell 101 and the cathode 221 of the second battery cell 201 may be closed or opened. That is, the first and second switch units 501 and 601 are not connected between the anode 111 of the first battery cell 101 and the cathode 221 of the second battery cell, 701). Here, the third switch unit 701 may be a switch device for connecting or disconnecting a voltage or a current, and there is no limitation on the type of the switch device.

The sixth switch unit 1001 is connected in parallel with the third battery cell 301 and the fourth battery cell 401 and is connected in parallel to the anode 311 of the third battery cell and the cathode 421) are connected (closed) or blocked (opened). More specifically, the sixth switch unit 1001 is connected in series between the anode 311 of the third battery cell 301 and the cathode 421 of the fourth battery cell, The anode 311 of the first battery cell 301 and the cathode 421 of the fourth battery cell 401 can be closed or opened. That is, the fourth and fifth switch units 801 and 901 are not connected between the anode 311 of the third battery cell 301 and the cathode electrode 421 of the fourth battery cell, 1001). Here, the sixth switch unit 1001 may be a switch device for connecting or disconnecting a voltage or a current, and there is no limitation on the type of the switch device.

The anode output unit 1101 is connected between the fourth battery cell 401 and the fourth switch unit 801. That is, the anode output unit 1101 may be branched from the circuit between the anode 411 of the fourth battery cell 401 and the fourth switch unit 801. The positive electrode output unit 1101 is connected in parallel with the negative electrode output unit of another battery module so that the battery module 2 including the positive electrode output unit 1101 and the battery module 1 ) Can be formed. A load may be connected to the anode output unit 1101.

The cathode output unit 1201 is connected between the first battery cell 101 and the second switch unit 601. That is, the negative output unit 1201 may be branched from the circuit between the negative electrode 121 of the first battery cell 101 and the second switch unit 601. The negative output unit 1201 is connected in parallel to the positive output unit of another battery module so that the battery module 2 including the negative output unit 1201 and the battery module 1 ) Can be formed. Also, a load may be connected to the cathode output unit 1201.

The control unit 1301 controls the first, second, third, fourth, fifth, or sixth switch unit 501, 601, 701, 801, 901, and 1001. More specifically, the control unit 1301 controls the first, second, third, fourth, fifth, or sixth switch unit 501, 601, 701, 801, 901, The module 2 can be switched to the low voltage high current mode 5 or the high voltage low current mode 6.

More specifically, the control unit 1301 closes the first switch unit 501, the second switch unit 601, the fourth switch unit 801, and the fifth switch unit 901 The third switch unit 701 and the sixth switch unit 1001 can be opened to switch the battery module 2 to the low voltage large current mode 5. [ That is, when the voltage of the first, second, third and fourth battery cells 101, 201, 301, and 401 is 4 V and the current is 3 Ah, switching to the low voltage high current mode 5 The voltage of the battery module 2 may be 8V and the current may be 6Ah. At this time, the operation mode of the vehicle including the battery module 2 may be a constant torque section 20 operation mode. That is, the control unit 1300 can switch the battery module 2 to the low voltage charging mode (5) when the operation mode of the vehicle is the constant torque period 20 operation mode.

The control unit 1301 closes the third switch unit 701 and the sixth switch unit 1001 and connects the first switch unit 501, the second switch unit 601, The switch unit 801 and the fifth switch unit 901 can be opened to switch the battery module 2 to the high voltage low current mode 6. [ That is, when the voltages of the first, second, third and fourth battery cells 101, 201, 301 and 401 are 4 V and the current is 3 Ah, The voltage of the battery module 2 may be 16V and the current may be 3Ah. At this time, the operation mode of the vehicle including the battery module 2 may be a constant output section 30 operation mode. That is, the controller 1301 can switch the battery module 2 to the high voltage low current mode 6 when the operation mode of the vehicle is the constant output period 30 operation mode.

In the second embodiment of the voltage-variable battery module 2 according to the present invention, a plurality of voltage-variable battery modules 1 may be connected in parallel. That is, in the second embodiment of the voltage-variable battery module 2, the positive output section 1101 and the negative output section 1201 are connected to the positive output section 1101 and the negative output section 12001 The number of the voltage-variable-type battery modules 2 to be coupled is not limited, and the number of the voltage-variable-type battery modules 2 to be connected to the voltage-variable- So that one voltage-variable battery module 1 can be formed.

It will be apparent to those skilled in the art that many other modifications and variations are possible in light of the above teachings and the scope of the present invention should be construed on the basis of the appended claims something to do.

1: A plurality of voltage-variable battery modules according to the present invention are connected in parallel to each other,
2: The voltage variable type battery module according to the present invention
3: Battery voltage
4: Battery current
5: Low voltage high current mode
6: High voltage low current mode
10: Battery pack according to prior art
11, 12, 13, 14: battery cell
15: Battery voltage level
20: Constant torque section
30: constant output section
100, 101: a first battery cell
110, 111: anode of the first battery cell 120, 121: cathode of the first battery cell
200, 201: second battery cell
210, 211: anode of the second battery cell 220, 221: cathode of the second battery cell
300, 301: Third battery cell
310, 311: anode of the third battery cell 320, 321: cathode of the third battery cell
400, 401: fourth battery cell
410, 411: anode of the fourth battery cell 420, 421: cathode of the fourth battery cell
500, 501: first switch section
600, 601: a second switch section
700, 701: third switch section
800, 801: fourth switch section
900, 901: fifth switch section
1000, 1001: sixth switch section
1100, 1101: Positive electrode output section
1200, 1201: cathode output section
1300, 1301:

Claims (8)

In a voltage-variable battery module,
A first battery cell that generates a half voltage of the battery voltage and a half current of the battery current;
A second battery cell that generates a half voltage of the battery voltage and a half current of the battery current;
A third battery cell generating a half of a voltage of the battery voltage and a half current of the battery current and having an anode connected to a cathode of the second battery cell;
A fourth battery cell that generates half of the battery voltage and half of the battery current;
A first switch unit for closing or opening the anode of the first battery cell and the anode of the second battery cell;
A second switch unit for closing or opening the cathode of the first battery cell and the cathode of the second battery cell;
A third switch connected in parallel with the first battery cell and the second battery cell and closing or opening the anode of the first battery cell and the anode of the second battery cell;
A fourth switch unit for closing or opening the anode of the third battery cell and the anode of the fourth battery cell;
A fifth switch for closing or opening the cathode of the third battery cell and the cathode of the fourth battery cell;
A sixth switch connected in parallel to the third battery cell and the fourth battery cell and closing or opening the anode of the third battery cell and the anode of the fourth battery cell;
A positive polarity output unit connected between the first battery cell and the first switch unit;
A cathode output connected between the fourth battery cell and the fifth switch unit; And
A control unit for controlling the first, second, third, fourth, fifth, or sixth switch unit;
Voltage battery module.
The method according to claim 1,
Wherein,
The first switch unit, the second switch unit, the fourth switch unit, and the fifth switch unit are closed and the third switch unit and the sixth switch unit are opened to switch the battery module to the low voltage large current mode Voltage battery module.
The method according to claim 1,
Wherein,
The third switch unit and the sixth switch unit are closed and the first switch unit, the second switch unit, the fourth switch unit, and the fifth switch unit are opened to switch the battery module to the high voltage low current mode And the voltage of the battery module is changed.
The method according to claim 1,
Wherein the plurality of voltage-variable battery modules are connected in parallel.
In a voltage-variable battery module,
A first battery cell that generates a half voltage of the battery voltage and a half current of the battery current;
A second battery cell that generates a half voltage of the battery voltage and a half current of the battery current;
A third battery cell generating a half of the battery voltage and a half current of the battery current and having a cathode connected to the anode of the second battery cell;
A fourth battery cell that generates half of the battery voltage and half of the battery current;
A first switch unit for closing or opening the anode of the first battery cell and the anode of the second battery cell;
A second switch unit for closing or opening the cathode of the first battery cell and the cathode of the second battery cell;
A third switch connected in parallel with the first battery cell and the second battery cell and closing or opening the anode of the first battery cell and the cathode of the second battery cell;
A fourth switch unit for closing or opening the anode of the third battery cell and the anode of the fourth battery cell;
A fifth switch for closing or opening the cathode of the third battery cell and the cathode of the fourth battery cell;
A sixth switch unit connected in parallel to the third battery cell and the fourth battery cell and closing or opening the anode of the third battery cell and the cathode of the fourth battery cell;
A positive polarity output unit connected between the fourth battery cell and the fourth switch unit;
A cathode output connected between the first battery cell and the second switch unit; And
A control unit for controlling the first, second, third, fourth, fifth, or sixth switch unit;
Voltage battery module.
6. The method of claim 5,
Wherein,
The first switch unit, the second switch unit, the fourth switch unit, and the fifth switch unit are closed and the third switch unit and the sixth switch unit are opened to switch the battery module to the low voltage large current mode Voltage battery module.
6. The method of claim 5,
Wherein,
The third switch unit and the sixth switch unit are closed and the first switch unit, the second switch unit, the fourth switch unit, and the fifth switch unit are opened to switch the battery module to the high voltage low current mode And the voltage of the battery module is changed.
6. The method of claim 5,
Wherein the plurality of voltage-variable battery modules are connected in parallel.

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