阅读说明：本技术 用于驱动车辆的电源系统 (Power supply system for driving vehicle ) 是由 张锡采 吴世龙 崔钟鹿 太龙准 于 2018-01-25 设计创作，主要内容包括：本发明公开了一种能够在减少部件数量并提高稳定性的同时将电力供给到车辆(尤其是电动车辆)的电源系统。本发明的实施例公开了一种电源系统,包括：包括电池单元的电池；形成在电池的一个电极与包括从电池接收电力的电机的电力负载单元之间的第一开关装置；具有电连接到电池的另一电极的一端的预充电电阻器；以及形成在预充电电阻器的另一端与电池的另一电极之间的第二开关装置。(Disclosed is a power supply system capable of supplying electric power to a vehicle (particularly, an electric vehicle) while reducing the number of components and improving stability. The embodiment of the invention discloses a power supply system, which comprises: a battery including a battery cell; a first switching device formed between one pole of the battery and an electric load unit including a motor that receives electric power from the battery; a pre-charge resistor having one end electrically connected to the other electrode of the battery; and a second switching device formed between the other end of the pre-charge resistor and the other electrode of the battery.)

1. A power supply system comprising:

a battery including a plurality of battery cells;

a first switching device formed between one electrode of the battery and an electric load unit including a motor that receives electric power from the battery;

a pre-charge resistor having one end electrically connected to the other electrode of the battery; and

a second switching device formed between the other end of the pre-charge resistor and the other electrode of the battery.

2. The power supply system according to claim 1, wherein the electric load unit includes a power conversion capacitor connected in parallel to an input terminal, and the first switching device and the precharge resistor are connected to opposite ends of the power conversion capacitor.

3. The power supply system of claim 1, further comprising: a third switching device connected between one end of the power conversion capacitor and the other electrode of the battery.

4. The power supply system of claim 1, further comprising: a fourth switching device connected between the other end of the precharge resistor and the first switching device.

5. The power supply system of claim 4, further comprising: a fifth switching device connected between the contacts of the first and fourth switching devices and the charging unit.

6. The power supply system according to claim 5, wherein the fifth switching device and the precharge resistor are connected to opposite ends of the power conversion capacitor located in front of the charging unit.

7. The power supply system according to claim 5, wherein the fifth switching device and the precharge resistor are connected to opposite ends of the power conversion capacitor located in front of the charging unit.

8. The power supply system according to claim 1, wherein the battery further includes a rupture switch connected to at least one of an intermediate portion between each of the battery cells, one electrode of the battery, and the other electrode of the battery.

9. The power supply system of claim 8, wherein the kill switch comprises a pyrotechnic switch.

10. A power supply system comprising:

a battery including a plurality of battery cells;

a first switching device formed between one electrode of the battery and an electric load unit including a motor that receives electric power from the battery;

a second switching device and a pre-charge resistor connected in parallel to the first switching device; and

a second switching device formed between the power load unit and the other electrode of the battery.

11. The power supply system of claim 10, further comprising:

a fourth switching device connected between one electrode of the battery and a contact of the first switching device and a charging unit that supplies power to the battery; and

a fifth switching device connected in parallel to the fourth switching device and another pre-charge resistor.

Technical Field

The present invention relates to a power supply system capable of supplying electric power to a vehicle (particularly, an electric vehicle) while reducing the number of components and improving stability.

Background

In general, a secondary battery that can be charged to be reusable is widely used as a power source for mobile devices, hybrid vehicles, electric vehicles, and the like. In particular, in recent years, with increasing interest in environmental issues, the demand for hybrid vehicles or electric vehicles is increasing, and the demand for high-output, large-capacity batteries is also increasing accordingly.

Since such a high-output, large-capacity battery supplies high-output electric power to drive the vehicle motor by high voltage or high current, safety measures have become a critical issue.

Disclosure of Invention

Technical problem to be solved

The present invention provides a power supply system capable of supplying electric power to a vehicle (particularly, an electric vehicle) while reducing the number of components and improving stability.

Technical scheme

According to an aspect of the present invention, there is provided a power supply system including: a battery including a plurality of battery cells; a first switching device formed between one pole of the battery and an electric load unit including a motor that receives electric power from the battery; a pre-charge resistor having one end electrically connected to the other electrode of the battery; and a second switching device formed between the other end of the pre-charge resistor and the other electrode of the battery.

Here, the power load unit may include a power conversion capacitor connected in parallel to the input terminal, and the first switching device and the precharge resistor are connected to opposite ends of the power conversion capacitor.

The power supply system may further include a third switching device connected between one end of the power conversion capacitor and the other electrode of the battery.

In addition, the power supply system may further include a fourth switching device connected between the other end of the precharge resistor and the first switching device.

In addition, the power supply system may further include a fifth switching device connected between the contacts of the first and fourth switching devices and the charging unit.

In addition, the fifth switching device and the precharge resistor may be connected to opposite ends of the power conversion capacitor located in front of the charging unit.

In addition, the fifth switching device and the precharge resistor may be connected to opposite ends of the power conversion capacitor located in front of the charging unit.

In addition, the battery may further include a rupture switch connected to at least one of an intermediate portion between each of the battery cells, one electrode of the battery, and the other electrode of the battery.

Additionally, the rupture switch may include a pyrotechnic switch.

According to another aspect of the present invention, there is provided a power supply system including: a battery including a plurality of battery cells; a first switching device formed between one pole of the battery and an electric load unit including a motor that receives electric power from the battery; a second switching device and a pre-charge resistor connected in parallel to the first switching device; and a second switching device formed between the power load unit and the other electrode of the battery.

In addition, the power supply system may further include: a fourth switching device connected between one electrode of the battery and a contact of the first switching device and a charging unit supplying power to the battery; and a fifth switching device connected in parallel to the fourth switching device and another precharge resistor.

Advantageous effects

As described above, the power supply system according to the present invention is configured such that the pre-charge resistor and the relay are commonly used by the power load unit, the battery unit, and the charging unit, thereby reducing the number of relays required for the circuit of the power supply system and simplifying the circuit configuration.

In addition, the power supply system according to the present invention includes a burst switch including a pyrotechnic switch located in at least one of the middle portions of each of the battery cells of the battery, thereby reducing the system size while increasing stability.

The advantageous effects of the present invention are not limited to those described above, and will become apparent by referring to the following detailed description of exemplary embodiments of the present invention.

Drawings

Fig. 1 is a circuit diagram showing a power supply system according to an embodiment of the present invention.

Fig. 2 is a circuit diagram for explaining a precharge operation for applying power to a battery and a vehicle motor in a power supply system according to an embodiment of the present invention.

Fig. 3 is a circuit diagram for explaining a precharge operation for applying power to a battery and a vehicle motor in a power supply system according to an embodiment of the present invention.

Fig. 4 is a circuit diagram for explaining a discharging operation of disconnecting the battery of the vehicle motor in the power supply system according to the embodiment of the invention.

Fig. 5 is a circuit diagram for explaining a precharge operation for charging a battery in a power supply system according to an embodiment of the present invention from an AC outlet.

Fig. 6 is a circuit diagram for explaining an operation of charging a battery in the power supply system according to the embodiment of the present invention from an AC outlet.

Fig. 7 is a circuit diagram for explaining a discharging operation of disconnecting the battery in the power supply system according to the embodiment of the present invention from the AC outlet.

Fig. 8 is a circuit diagram showing a power supply system according to another embodiment of the present invention.

Fig. 9 is a circuit diagram showing a power supply system according to still another embodiment of the present invention.

Fig. 10 is a circuit diagram showing a power supply system according to still another embodiment of the present invention.

Fig. 11 is a circuit diagram showing a power supply system according to still another embodiment of the present invention.

Brief description of the main components of the drawings

100. 200 and 300: the power supply system 110: battery module

111: the battery cell 112: fuse wire

120. 140, 150, 160, 320, 330, 350, 360, 370: switching device

420. 460, 470, 520, 550, 570: switching device

130. 340, 380, 440: pre-charge resistor

280. 290, 312, 430, 450, 540: breaking switch

10: power load unit 11: electric machine

12: inverter 13: power conversion capacitor

14: the switching device 15: resistor with a resistor element

20: the battery cell 21: vehicle battery

22: DC/DC converter 30: charging unit

31: the socket 32: OBC group

33: power conversion capacitor 34: switching device

35: resistor with a resistor element

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the embodiments.

Fig. 1 is a circuit diagram showing a power supply system according to an embodiment of the present invention.

First, referring to fig. 1, a power supply system 100 for electrically connecting an electric load unit 10 of a vehicle to a battery unit 20 and a charging unit 30 according to an embodiment of the present invention includes a battery module 110, a first switching device 120, a pre-charge resistor 130, a second switching device 140, a third switching device 150, a fourth switching device 160, and a fifth switching device 170.

Here, the battery module 110 may include a plurality of battery cells 111 electrically connected to each other. For example, as shown, the battery cells 111 may be connected in series with each other, but may alternatively be connected in parallel with each other or in series/parallel. The battery cell 111 may be a secondary battery that can be charged and discharged. Accordingly, the battery unit 111 may be discharged to supply power to the power load unit 10 and the battery unit 20, and may be charged by receiving power from the charging unit 30.

In addition, a fuse 112 may be further provided between each of the battery cells 111. When the current flowing in the battery module 110 exceeds the allowable limit, the fuse 112 provided in the current path established between the battery cells 111 may be opened. Therefore, the fuse 112 can cut off the current exceeding the allowable limit, thereby ensuring safety.

One end of the first switching device 120 may be connected to one electrode (e.g., a positive electrode) of the battery module 110. In addition, the other end of the first switching device 120 may be connected to the power load unit 10 and the battery unit 20. Accordingly, the first switching device 120 may open or close a current path from the battery module 110 to the power load unit 10 and the battery unit 20.

The first switching device 120 may be constituted by a relay contact. The relay may generally include a relay coil (not shown) and relay contacts. In addition, the first switching device 120 constituted by the relay contacts may be controlled to be opened or closed by applying a current to the relay coil or cutting off the current. Here, the external controller (not shown) may control the charge/discharge current, which is a relatively large current flowing in the first switching device 120, through a relatively small current flowing in the relay coil, thereby safely controlling the charge/discharge current flowing in the first switching device 120.

One end of the precharge resistor 130 is connected to the power load unit 10 and the charging unit 30, and the other end of the precharge resistor 130 is connected to the battery module 110 through the second switching device 140. The other end of the precharge resistor 130 is connected to a contact between the second through fourth switching devices 140 through 160. Accordingly, when the battery module 110 is connected to the power load unit 10 and the charging unit 30, the pre-charging resistor 130 may provide a path for pre-charging the power conversion capacitors 13 and 33 included in the power load unit 10 and the charging unit 30, respectively.

One end of the second switching device 140 is connected between the precharge resistor 130 and the fourth switching device 160, and the other end of the second switching device 140 is connected to the other electrode (e.g., a negative electrode) of the battery module 110. The second switching device 140 may also be constituted by a relay contact connected to a relay coil (not shown).

The second switching device 140 maintains an open state at a normal time and is closed during the precharge of the power conversion capacitors 13 and 33 of the power load unit 10 and the charging unit 30. Therefore, as will be described later, the power conversion capacitors 13 and 33 can be precharged.

The third switching device 150 is connected between each of the power load unit 10, the battery unit 20, and the charging unit 30 and the other electrode of the battery module 110. The third switching device 150 may also be constituted by a relay contact connected to a relay coil (not shown).

The third switching device 150 opens or closes a discharge path for applying power from the battery module 110 to the power load unit 10 and the battery unit 20 and a charge path for charging the battery module 110 using power from the charging unit 30. That is, when the third switching device 150 is closed, the discharge path or the charge path is connected.

The fourth switching device 160 is connected between the contacts of the first switching device 120 and the fifth switching device 170 and the contacts of the pre-charge resistor 130 and the second switching device 140. The fourth switching device 160 may also be constituted by a relay contact connected to a relay coil (not shown).

The fourth switching device 160 may be connected to discharge the power conversion capacitors 13 and 33 of the power load unit 10 and the charging unit 30. That is, if the fourth switching device 160 is closed and the first to third switching devices 120, 140 and 150 are opened, the power conversion capacitors 13 and 33 of the power load unit 10 and the charging unit 30 may be selectively connected to the precharge resistor 130 to establish a closed loop, thereby performing a discharging operation.

The fifth switching device 170 is connected between the contacts of the first and fourth switching devices 120 and 160 and the charging unit 30. The fifth switching device 170 may also be constituted by a relay contact connected to a relay coil (not shown).

If the fifth switching device 170 is closed, a current path for the charging unit 30 is established to charge the power conversion capacitor 33 provided in the charging unit 30 or to apply power from the charging unit 30 to the battery module 110 to charge the battery module 110.

As described above, the power supply system 100 according to the embodiment of the present invention is configured such that the pre-charge resistor 130 and the relays 120 and 140 to 170 are commonly used by the power load unit 10, the battery unit 20, and the charging unit 30, thereby reducing the number of relays required for the circuit of the power supply system 100 and simplifying the circuit configuration.

Hereinafter, the operation of the power supply system according to the embodiment of the present invention will be described in more detail.

Fig. 2 is a circuit diagram for explaining a precharge operation for applying power to a battery and a vehicle motor in a power supply system according to an embodiment of the present invention.

Referring to fig. 2, the power supply system 100 according to an embodiment of the present invention may operate to close the first switching device 120 and the second switching device 140 and open the other switching devices 150, 160, and 170. In this case, as shown in fig. 2, the battery module 110 is connected to the power conversion capacitor 13 of the power load unit 10 to supply power for precharging.

More specifically, a current path is established from one electrode (e.g., a positive electrode) of the battery module 110 to the other electrode (e.g., a negative electrode) of the battery module 110 through the first switching device 120, the power conversion capacitor 13 of the power load unit 10, the pre-charge resistor 130, and the second switching device 140.

The power conversion capacitor 13 provided in the power load unit 10 may be precharged by the battery module 110. Therefore, when the power load unit 10 and the battery unit 20 are connected, electric shock applied to the respective elements of the battery module 110, the power load unit 10, and the battery unit 20 can be prevented.

Fig. 3 is a circuit diagram for explaining a precharge operation for applying power to a battery and a vehicle motor in a power supply system according to an embodiment of the present invention.

Next, referring to fig. 3, the power supply system 100 according to an embodiment of the present invention may operate to close the first switching device 120 and the third switching device 150 and open the other switching devices 140, 160, and 170. In this case, as shown in fig. 3, the battery module 110 is connected to the power load unit 10.

In addition, the switching device 14 provided in the power load unit 10 is closed to connect the resistor 15 having a relatively large resistance value in parallel to the power conversion capacitor 13, thereby supplying current to the inverter 12.

According to this operation mechanism, the electric power of the battery module 110 can be transmitted to the motor 11 provided in the electric load unit 10. Of course, the inverter 12 may be provided in front of the motor 11 to have a voltage and a phase applied to the motor 11.

In addition, the current from the battery module 110 may also be supplied to the DC-DC converter 22 of the battery unit 20 connected in parallel to the inverter 12, and the vehicle battery 21 provided in the battery unit 20 may also be charged. Here, the vehicle battery 21 may be generally constituted by a 12V battery.

Fig. 4 is a circuit diagram for explaining a discharging operation of disconnecting the battery of the vehicle motor in the power supply system according to the embodiment of the invention.

Next, referring to fig. 4, the power supply system 100 according to an embodiment of the present invention may operate to open the first switching device 120, the second switching device 140, the third switching device 150, and the fifth switching device 170, and to close only the fourth switching device 140.

Accordingly, the power conversion capacitor 13 may establish a closed loop connected to the precharge resistor 130 through the fourth switching device 140, thereby performing a discharging operation.

Therefore, when the power load unit 10 is disconnected from the battery module 110, the power charged in the power conversion capacitor 13 may be consumed to prevent power from being applied to the motor 11 of the power load unit 10 and to prevent an electric shock from being applied to various elements.

Fig. 5 is a circuit diagram for explaining a precharge operation for charging a battery in a power supply system according to an embodiment of the present invention from an AC outlet.

Referring to fig. 5, the power supply system 100 according to an embodiment of the present invention may operate to close the first switching device 120, the second switching device 140, and the fifth switching device 170, and open the third switching device 150 and the fourth switching device 160.

Accordingly, the battery module 110 may establish a closed loop including the first switching device 120, the fifth switching device 170, the power conversion capacitor 33 of the charging unit 30, the pre-charge resistor 130, and the second switching device 140.

Here, the current may flow through the power conversion capacitor 13 of the power load unit 10. However, the switching device 14 of the power load unit 10 is closed, thereby preventing current from flowing in the power load unit 10.

Accordingly, the power conversion capacitor 33 of the charging unit 30 may receive power from the battery module 110 to be precharged, thereby preventing an electric shock from being applied to the battery module 110 and the respective elements of the charging unit 30 when the charging unit 30 is connected to the battery module 110.

Fig. 6 is a circuit diagram for explaining an operation of charging a battery in the power supply system according to the embodiment of the present invention from an AC outlet.

Referring to fig. 6, the power supply system 100 according to an embodiment of the present invention may operate to close the first switching device 120, the third switching device 150, and the fifth switching device 170, and operate the other switching devices 140 and 160.

Accordingly, the battery module 110 may establish a closed loop with the first switching device 120, the fifth switching device 170, the charging unit 30, and the third switching device 150.

Accordingly, power applied through the OBC set 32 from an external power source (not shown) coupled to the socket 31 located in the charging unit 30 may be transmitted to the battery module 110 to charge the battery module 110.

In addition, the switching device 34 provided in the charging unit 30 may be closed to connect the resistor 35 having a relatively large resistance value in parallel to the power conversion capacitor 33, thereby applying the current from the charging unit 30 to the battery module 110.

Fig. 7 is a circuit diagram for explaining a discharging operation of disconnecting the battery in the power supply system according to the embodiment of the present invention from the AC outlet.

Next, referring to fig. 7, the power supply system 100 according to an embodiment of the present invention may operate to close the fourth switching device 160 and the fifth switching device 170 and open the first to third switching devices 110, 140 and 150.

Accordingly, the power conversion capacitor 33 provided in the charging unit 30 may establish a closed loop with the fourth switching device 160, the fifth switching device 170, and the precharge resistor 130, and the power stored in the power conversion capacitor 33 may be consumed in the precharge resistor 130. Accordingly, the power conversion capacitor 33 may be discharged, thereby preventing an electric shock from being applied to the respective elements when the battery module 110 is disconnected from the charging unit 30.

Therefore, using this circuit configuration, the power supply system 100 according to the embodiment of the present invention may be configured such that the power conversion capacitor 13 of the power load unit 10 performs a pre-charge or discharge operation, thereby preventing power from the battery module 110 from being applied to the power load unit 10 and the battery unit 20 when the battery module 110 and the charging unit 30 are connected to or disconnected from each other.

In addition, the power supply system 100 according to the embodiment of the present invention may also be configured such that the power conversion capacitor 33 of the charging unit 30 performs a pre-charging or discharging operation, thereby preventing an electrical shock from being applied to the respective elements when the battery module 110 and the charging unit 30 are connected to or disconnected from each other.

Hereinafter, a power supply system according to another embodiment of the present invention will be described.

Fig. 8 is a circuit diagram showing a power supply system according to another embodiment of the present invention.

Referring to fig. 8, the power supply system 200 according to another embodiment of the present invention may further include a rupture switch 280 connected between one electrode of the battery module 110 and the first switching device 120, and a rupture switch 290 connected between the other electrode of the battery module 110 and a contact between the second switching device 140 and the third switching device 150.

The rupture switches 280 and 290 may replace conventional fuses and may be comprised of pyrotechnic switches. The rupture switches 280 and 290 may be configured to rupture when the current exceeds a predetermined level, thereby cutting off the current from the battery module 110. In addition, the rupture switches 280 and 290, which are alternatives to the conventional fuse, may have a reduced size and may ensure operational stability.

Hereinafter, a power supply system according to still another embodiment of the present invention will be described.

Fig. 9 is a circuit diagram showing a power supply system according to still another embodiment of the present invention.

Referring to fig. 9, the power supply system 300 according to an embodiment of the present invention may include a rupture switch 312 between each of the battery cells 111 in the battery 310.

The rupture switch 312 may also be constituted by a pyrotechnic switch, and may prevent an overcurrent from flowing in the battery 310. In addition, the rupture switch 312, as a substitute for the conventional fuse, can be stably operated while being reduced in size.

In addition, the power supply system 300 according to an embodiment of the present invention may include a first switching device 320, a second switching device 330, a precharge resistor 340, and a third switching device 350 connected to the power load unit 10 and the battery unit 20 from the battery module 110.

Here, the first switching device 320 may be connected to the second switching device 330 and the precharge resistor 340 in parallel. In addition, when the pre-charge resistor 13 is connected, the second switching device 330 and the third switching device 350 are closed, and when the motor 11 or the vehicle battery 21 is connected, the first switching device 320 and the third switching device 350 are closed, thereby performing the entire operations of the power load unit 10 and the battery unit 20 (including the pre-charge of the power conversion capacitor 13).

In addition, the power supply system 300 according to an embodiment of the present invention may include a fourth switching device 360, a fifth switching device 370, and a precharge resistor 380 connected from the battery module 110 to the charging unit 30.

Here, the fourth switching device 360 may also be connected in parallel to the fifth switching device 370 and the precharge resistor 380. In addition, the fourth switching device 360 and the fifth switching device 370 may be opened or closed in the same manner as the first switching device 320 and the second switching device 330, thereby performing the entire operation of the charging unit 30 (including the pre-charging of the power conversion capacitor 33).

Hereinafter, a power supply system according to still another embodiment of the present invention will be described.

Fig. 10 is a circuit diagram showing a power supply system according to still another embodiment of the present invention.

Referring to fig. 10, the power supply system 400 according to an embodiment of the present invention may include a first switching device 420, a second switching device 460, and a pre-charge resistor 440 connected to the power load unit 10 and the battery unit 20. In addition, the power supply system 400 according to an embodiment of the present invention may further include rupture switches 430 and 450 located at opposite ends of the second switching device 460.

Here, the first switching device 420 and the precharge resistor 440 are connected to the power load unit 10, so that power is applied to the motor 11 through the inverter 12 while precharging the power conversion capacitor 13. In this case, since the voltage applied to the power conversion capacitor 13 and the inverter 12 through the pre-charge resistor 440 is less than the voltage of the battery module 110, when the power load unit 10 is connected, an electric shock can be prevented.

In addition, after the pre-charging, the second switching device 460 is connected to apply the power from the battery module 110 to the inverter 12 and the motor 11.

In addition, the power supply system 400 according to an embodiment of the present invention may further include a third switching device 470 connected to the charging unit 30.

The third switching device 470 may operate in the same manner as the first switching device 420 to allow the charging unit 30 to supply power to the battery module 110.

Hereinafter, a power supply system according to still another embodiment of the present invention will be described.

Fig. 11 is a circuit diagram showing a power supply system according to still another embodiment of the present invention.

Referring to fig. 11, the power supply system 500 according to an embodiment of the present invention may include a first switching circuit 520 commonly connected between one electrode (e.g., a positive electrode) of the battery module 110 and each of the power load unit 10, the battery unit 20, and the charging unit 30. In addition, the power supply system 500 according to an embodiment of the present invention may include a pre-charge resistor 530 and a second switching device 550 connected between each of the power load unit 10, the battery cell 20, and another electrode (e.g., a negative electrode) of the battery module 110. Here, the precharge resistor 530 may establish a path for precharging the power conversion capacitor 13 of the power load unit 10 and a path for supplying power to the inverter 12 and the motor 11 when the second switching device 550 is closed.

In addition, the power supply system 500 according to an embodiment of the present invention may include a precharge resistor 560 and a third switching device 570 connected between the power load unit 30 and another electrode (e.g., a negative electrode) of the battery module 110.

Here, the precharge resistor 560 and the third switching device 570 may operate in the same manner as the precharge resistor 530 and the second switching device 530, respectively, to establish a path connecting the charging unit 30 to the battery module 110.

In addition, the rupture switch 540 may be further provided in front of the other electrode (e.g., a negative electrode) of the battery module 110 to operate as a fuse, thereby improving safety while reducing the size.

While the power supply system of the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.