CN112564257A - Power control device - Google Patents
Power control device Download PDFInfo
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- CN112564257A CN112564257A CN202010868470.5A CN202010868470A CN112564257A CN 112564257 A CN112564257 A CN 112564257A CN 202010868470 A CN202010868470 A CN 202010868470A CN 112564257 A CN112564257 A CN 112564257A
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- Prior art keywords
- power supply
- power
- ground line
- battery
- ecu
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The power control device of the present invention includes: an ECU; a direct current power supply; a backup power supply that operates using the control voltage as an operation source, supplies power to an ECU when power supply from a battery to the ECU is stopped, and supplies power to a dc power supply when power supply from the battery to the dc power supply is stopped; a 1 st ground line connected to a ground terminal of the direct-current power supply; a 2 nd ground line connected to a ground terminal of the backup power supply; and a current path forming member that electrically connects the 1 st ground line and the 2 nd ground line and forms a path through which a current flows unidirectionally from the 1 st ground line to the 2 nd ground line.
Description
Technical Field
The present invention relates to a power control device.
This application claims priority based on patent application No. 2019-163295 filed in japan on 9/06/2019, the contents of which are incorporated herein by reference.
Background
Patent document 1 listed below discloses a power control device mounted in a vehicle. The power control apparatus includes an ECU. The ECU controls electric power from the driving battery to the running motor using electric power from an auxiliary battery provided outside as an operation source. The ECU is electrically connected to the auxiliary battery via a 1 st power supply line and a ground line. The ECU obtains electric power from the auxiliary battery via the 1 st power supply line and the ground line.
When the auxiliary battery stops supplying electric power to the ECU due to some abnormal state, the ECU stops operating. In order to avoid such a situation, in a case where the supply of electric power from the auxiliary battery to the ECU is stopped, a backup power supply for supplying electric power to the ECU is required.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 9-233830
Disclosure of Invention
Problems to be solved by the invention
The power control device includes a direct-current power supply that generates a control voltage from power obtained from the auxiliary battery. The direct-current power supply is connected to the auxiliary battery via a 2 nd power supply line. The direct-current power supply obtains electric power from the auxiliary battery via a 2 nd power supply line. The backup power supply may be operated by a control voltage generated by the dc power supply to supply electric power to the ECU. The backup power supply supplies power to the ECU with reference to the potential of the ground line.
When the 1 st power supply line and the ground line are disconnected due to an abnormality, the supply of electric power from the auxiliary battery to the ECU is stopped. In the case where the 2 nd power supply line is also disconnected due to the abnormality, the reference and control voltages may be lost, and the operation of the backup power supply may be stopped. As a result, the supply of electric power to the ECU is stopped.
The present invention has been made in view of such circumstances, and an object thereof is to provide a power control device capable of supplying power from a backup power supply to an ECU even when the 1 st power supply line, the 2 nd power supply line, and the ground line are disconnected.
Means for solving the problems
(1) An aspect of the present invention is a power control device mounted in a vehicle, including: an ECU that supplies electric power from a battery mounted on the vehicle; a direct current power supply that generates a control voltage from power supplied from the battery; a backup power supply that operates using the control voltage as an operation source, supplies power to the ECU when power supply from the battery to the ECU is stopped, and supplies power to the dc power supply when power supply from the battery to the dc power supply is stopped; a 1 st ground line connected to a ground terminal of the direct-current power supply; a 2 nd ground line connected to a ground terminal of the backup power supply; and a current path forming member that electrically connects the 1 st ground line and the 2 nd ground line and forms a path through which a current flows unidirectionally from the 1 st ground line to the 2 nd ground line.
(2) As the power control device of the above (1), the current path forming means may include: and a diode having an anode connected to the 1 st ground line and a cathode connected to the 2 nd ground line.
(3) The power control device according to the above (1) or (2) may further include a connector for connecting the power control device to the battery. Further, the 2 nd ground line may be connected to a terminal of the connector, and the current path forming member may be disposed in the vicinity of the connector.
Effects of the invention
As described above, according to the present invention, even when the 1 st power supply line, the 2 nd power supply line, and the 2 nd ground line are disconnected, electric power can be supplied from the backup power supply to the ECU.
Drawings
Fig. 1 is a diagram showing a configuration of a vehicle a including a power control device according to an embodiment.
Fig. 2A is a diagram illustrating a normal operation of the power control device 4 according to the present embodiment.
Fig. 2B is a diagram illustrating an operation of the power control device 4 according to the present embodiment.
Fig. 3 is a diagram illustrating the current path forming member 11 according to the present embodiment.
Description of the reference numerals
1 st cell
2 nd battery
3 Motor
4 power control device
7 connector
8 DC power supply
9 Standby power supply
10 ECU
11 Current path Forming Member
GND1L ground line 1
Detailed Description
Hereinafter, the power control device according to the present embodiment will be described with reference to the drawings.
Fig. 1 is a diagram showing a configuration of a vehicle a including a power control device according to the present embodiment. The vehicle a shown in fig. 1 is, for example, a hybrid vehicle or an electric vehicle.
As shown in fig. 1, the vehicle a includes a 1 st battery 1, a 2 nd battery 2, a motor 3, and a power control device 4.
The 1 st battery 1 is a rechargeable secondary battery. The 1 st cell 1 is, for example, a lithium ion cell. The 1 st battery 1 is a so-called high-voltage battery and is used for driving the motor 3.
The 2 nd battery 2 is a rechargeable secondary battery. For example, the 2 nd battery 2 is a lithium ion battery, for example. The 2 nd battery 2 is a so-called low-voltage battery, and supplies electric power to low-voltage system devices. The low-voltage device is, for example, an auxiliary machine.
The motor 3 may be the 1 st electric motor for traveling of the vehicle a. The motor 3 may also be used as a generator driven by the engine of the vehicle a, and be a 2 nd electric motor for starting the engine. The motor 3 may also have the function of the 1 st electric motor and the function of the 2 nd electric motor.
The power control device 4 is connected to the 1 st battery 1 and the motor 3, respectively. The power control device 4 converts the dc power W1 from the battery 1 of fig. 1 into ac power and supplies the ac power to the motor 3. The power control device 4 may convert regenerative power, which is ac power generated by the motor 3, into dc power and supply the dc power to the 1 st battery 1. That is, the power control device 4 controls the supply of electric power between the 1 st battery 1 and the motor 3. The power control device 4 is connected to the 2 nd battery 2. The power control device 4 uses the dc power W2 of the 2 nd battery 2 as a power source of the low-voltage system equipment.
An example of a schematic configuration of the power control device 4 of the present embodiment will be described below. The power Control device 4 of the present embodiment includes a capacitor 5, an inverter 6, a connector 7, a dc power supply 8, a backup power supply 9, an ECU (Electronic Control Unit) 10, and a current path forming Unit 11.
The capacitor 5 is a capacitor for smoothing provided between the 1 st battery 1 and the inverter 6. The 1 st end of the capacitor 5 is connected to the positive terminal of the 1 st cell 1, and the 2 nd end is connected to the negative terminal of the 1 st cell 1.
The inverter 6 rotationally drives the motor 3. The inverter 6 may also be controlled by the ECU 10.
The connector 7 is a connection member for connecting the power control device 4 to the 2 nd battery 2. For example, the connector 7 includes a 1 st terminal 72 and a 2 nd terminal 73.
The 1 st terminal 72 is connected to the 2 nd ground (GND 2). The 2 nd ground (GND2) is a reference potential for operating the backup power supply 9 and the ECU 10. Specifically, the 1 st terminal 72 is connected to the 2 nd ground connection line L2, and is grounded to the 2 nd ground (GND 2). For example, the 1 st end of the connection line L2 is connected to the 1 st terminal 72, and the 2 nd end is connected to the 2 nd ground (GND 2). The 2 nd ground (GND2) and the 1 st ground (GND1) are connected at one point with respect to the vehicle body of the vehicle a. The 2 nd ground (GND2) is higher in potential than the 1 st ground (GND 1).
The 2 nd terminal 73 is connected to the positive terminal of the 2 nd battery 2 via a connection line L3. The connection line L3 is the 1 st power line. For example, the 1 st end of the connection line L3 is connected to the 2 nd terminal 73, and the 2 nd end is connected to the positive terminal of the 2 nd battery 2.
The dc power supply 8 generates a control voltage Vs from the electric power W2 supplied from the 2 nd battery 2. Specifically, the dc power supply 8 includes a power supply terminal 8a, a ground terminal 8b, an output terminal 8c, and a power supply terminal 8 d. The power supply terminal 8a is connected to the positive terminal of the 2 nd battery 2 via a 1 st power supply line PL 1. The 1 st power supply line PL1 is connected to the positive terminal of the 2 nd battery 2 via a connection line L4. The connection line L4 is the 2 nd power line. The 1 st end of the connection line L4 is connected to the 1 st power supply line PL1, and the 2 nd end is connected to the positive terminal of the 2 nd battery 2.
The ground terminal 8b is connected to the 1 st ground line GND 1L. The output terminal 8c is connected to the backup power supply 9. The dc power supply 8 generates a control voltage Vs from the electric power W2 with reference to the potential of the ground terminal 8 b. The potential of the ground terminal 8b is the potential of the 1 st ground line GND 1L. The dc power supply 8 outputs a control voltage Vs from an output terminal 8 c.
The connection line L1 is connected to the 1 st ground line GND 1L. The 1 st end of the connection line L1 is connected to the 1 st ground line GND1L, and the 2 nd end is connected to the negative terminal of the 2 nd battery 2. Also, the negative terminal of the 2 nd battery 2 is connected to the 1 st ground (GND 1).
The backup power supply 9 operates with the control voltage Vs as an operation source, and generates electric power W3 from electric power W1 from the 1 st battery 1. For example, the backup power supply 9 steps down the electric power W1 from the 1 st battery 1 to generate an electric power W3. When the power supply from the 2 nd battery 2 to the ECU 10 is stopped, the backup power supply 9 supplies the electric power W3 to the ECU 10. When the supply of power from the 2 nd battery 2 to the dc power supply 8 is stopped, the backup power supply 9 supplies power W3 to the dc power supply 8.
Specifically, the backup power supply 9 includes a power supply terminal 9a, a ground terminal 9b, a 1 st input terminal 9c, a 2 nd input terminal 9d, and an output terminal 9 e. The power supply terminal 9a is connected to the output terminal 8c via a 2 nd power supply line PL 2. The ground terminal 9b is connected to the 2 nd ground line GND 2L. The 2 nd ground line GND2L is connected to the 1 st terminal 72. The ground terminal 9b is connected to the 1 st terminal 72 through the 2 nd ground line GND 2L. The 1 st input terminal 9c is connected to the 1 st end of the capacitor 5. The 2 nd input terminal 9d is connected to the 2 nd end portion of the capacitor 5. The output terminal 9e is connected to the ECU 10 via a 3 rd power supply line PL 3. Further, the output terminal 9e is connected to the power supply terminal 8d of the dc power supply 8 via a 3 rd power supply line PL 3.
Power supply line PL 33 branches into branch power supply line PL3a and branch power supply line PL3b at a branch point N in the middle. Branch power supply line PL3a has a 1 st end connected to branch point N and a 2 nd end connected to power supply terminal 8d of dc power supply 8.
Branch power supply line PL3b has a 1 st end connected to branch point N and a 2 nd end connected to ECU 10.
The backup power supply 9 generates electric power W3 from electric power W1 input to the 1 st input terminal 9c and the 2 nd input terminal 9d with the potential of the ground terminal 9b as a reference. The potential of the ground terminal 9b is the potential of the 2 nd ground line GND 2L. The backup power supply 9 outputs the generated electric power W3 from the output terminal 9 e.
The ECU 10 operates by being supplied with electric power W2 from the 2 nd battery 2 mounted in the vehicle a. When the power supply from the 2 nd battery 2 is stopped, the ECU 10 continues the operation by being supplied with the electric power W3 from the backup power supply 9. The ECU 10 of the present embodiment controls the operation of the inverter 6 to control the driving of the motor 3. For example, the ECU 10 is a motor ECU. However, the ECU 10 of the present embodiment is not limited to the motor ECU, and may be any ECU mounted on the vehicle a.
The ECU 10 includes a 1 st power supply terminal 10a, a 2 nd power supply terminal 10b, and a ground terminal 10 c.
The 1 st power supply terminal 10a is connected to the 2 nd terminal 73 via a 4 th power supply line PL 4. The 2 nd power supply terminal 10b is connected to the branch power supply line PL3 b. The ground terminal 10c is connected to the 1 st terminal 72 via the 2 nd ground line GND 2L. The ECU 10 operates with the potential of the ground terminal 10c as a reference. The potential of the ground terminal 10c is the potential of the 2 nd ground line GND 2L.
The ECU 10 operates based on the electric power W2 input to the 1 st power supply terminal 10a via the 4 th power supply line PL 4. When the electric power W2 disappears, the ECU 10 operates based on the electric power W3 input to the 2 nd power supply terminal 10b via the 3 rd power supply line PL3 b.
The current path forming member 11 electrically connects the 1 st ground line GND1L and the 2 nd ground line GND 2L. In order to prevent an unexpected current from flowing from the 2 nd ground line GND2L having a high potential to the 1 st ground line GND1L, the current path forming member 11 forms a path through which a current flows unidirectionally from the 1 st ground line GND1L to the 2 nd ground line GND 2L. In the case where the external load 101 is connected in parallel to the 2 nd battery 2, the current path forming member 11 limits the current from the 1 st ground line GND1L to the 2 nd ground line GND2L to a single direction so as not to change the current loop IR from the auxiliary device supply and battery charging power supply 100 to the external load 101 shown in fig. 3.
For example, the current path forming member 11 includes a diode 12. The anode of diode 12 is connected to 1 st ground line GND1L, and the cathode is connected to 2 nd ground line GND 2L. However, the current path forming member 11 is not limited to the diode 12, and may be any member that forms a path through which a current flows unidirectionally from the 1 st ground line GND1L to the 2 nd ground line GND 2L. For example, the current path forming member 11 may be a switch that is connected to detect that the potential of the 2 nd ground line GND2L is lower than the potential of the 1 st ground line GND 1L.
The current path forming member 11 may also be provided in the vicinity of the connector 7 connected to the ECU 10. Thus, the 1 st ground line GND1 and the 2 nd ground line GND2 can be connected by the shortest path.
Next, the operation of the power control device 4 of the present embodiment will be described. First, a normal operation, which is an operation in a normal state of the power control device 4, will be described with reference to fig. 2A. Fig. 2A is a diagram illustrating a normal operation of the power control device 4 according to the present embodiment.
In a normal state where the connection lines L1 to L4 are not disconnected, the 1 st loop I1 is formed. The 1 st circuit I1 is a circuit in which the current output from the positive terminal of the 2 nd battery 2 is returned to the negative terminal of the 2 nd battery 2 via the connection line L4, the 1 st power supply line PL1, the dc power supply 8, the 1 st ground line GND1L, and the connection line L1. The power W2 is supplied from the 2 nd battery 2 to the dc power supply 8 by the current flowing in the 1 st loop I1. The dc power supply 8 operates with the electric power W2 to generate the control voltage Vs. The dc power supply 8 outputs the generated control voltage Vs from the output terminal 8 c. The backup power supply 9 is operated by the control voltage Vs.
Further, in the normal state, the 2 nd loop I2 is formed. The 2 nd circuit I2 is a circuit in which the current output from the positive terminal of the 2 nd battery 2 is returned to the negative terminal of the 2 nd battery 2 via the connection line L3, the 4 th power supply line PL4, the ECU 10, the 2 nd ground line GND2L, and the connection line L2. Electric power W2 is supplied from the 2 nd battery 2 to the ECU 10 by the current flowing in the 2 nd circuit I2. The ECU 10 is operated by electric power W2.
The operation of the power control device 4 in an abnormal state according to the present embodiment will be described with reference to fig. 2B. Fig. 2B is a diagram illustrating an operation of the power control device 4 in an abnormal state according to the present embodiment. The abnormal state is a state in which the electrical connection between the 1 st terminal 72 and the 2 nd ground, and the electrical connection between the 2 nd terminal 73 and the positive terminal of the 2 nd battery 2 are released. For example, the abnormal state is a case where the connection lines L2 to L4 are disconnected or a case where the connector 7 is detached. In the abnormal state, the 1 st loop I1 and the 2 nd loop I2 shown in fig. 2A are not formed.
In the abnormal state, the 3 rd loop I3 is formed. The 3 rd loop I3 is a loop in which the current output from the output terminal 9e of the backup power supply 9 is returned to the ground terminal 9b of the backup power supply 9 via the 3 rd power supply line PL3, the branch power supply line PL3a, the dc power supply 8, the 1 st ground line GND1L, the current path forming member 11, and the 2 nd ground line GND 2L. In the abnormal state, the 4 th loop I4 is formed. The 4 th loop I4 is a loop in which the current output from output terminal 9e of backup power supply 9 is returned to ground terminal 9b of backup power supply 9 via 3 rd power supply line PL3, branch power supply line PL3b, ECU 10, and 2 nd ground line GND 2L.
By forming the 3 rd loop I3, the dc power supply 8 takes the electric power W3 from the backup power supply 9. The dc power supply 8 continues to operate with the electric power W3. A path through which a current flows unidirectionally from 1 st ground line GND1L to 2 nd ground line GND2L is formed by current path forming member 11. Thus, the 3 rd loop I3 is formed. Even in the abnormal state, the dc power supply 8 can continue to operate by the electric power W3 from the backup power supply 9. Even if the dc power supply 8 continues to operate and is in an abnormal state, the backup power supply 9 is supplied with the dc power supply Vs from the dc power supply 8. Even in the abnormal state, the backup power source 9 can supply the electric power W3 to the ECU 10 through the 4 th circuit I4. Thus, even in the abnormal state, the backup power supply 9 can continue to operate through the 3 rd loop I3. Even in the abnormal state, the backup power supply 9 can supply the electric power W3 to the dc power supply 8 and the ECU 10.
For example, when the connection lines L3 and L4 are disconnected, the 3 rd loop I3 and the 4 th loop I4 are formed as shown in fig. 2B. Therefore, the ECU 10 is supplied with the electric power W3 from the backup power supply 9.
While the embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to the embodiments, and designs and the like within the scope not departing from the gist of the present invention are also included.
As described above, power control device 4 of the present embodiment includes 1 st ground line GND1L and 2 nd ground line GND 2L. The power control device 4 further includes a current path forming member 11 that electrically connects the 1 st ground line GND1L and the 2 nd ground line GND2L and forms a path through which a current flows unidirectionally from the 1 st ground line GND1L to the 2 nd ground line GND 2L.
In such a configuration, even in the case of an abnormal state, electric power can be supplied from the backup power supply 9 to the ECU 10.
Industrial applicability
According to the above power control device, even in the case of an abnormal state, power can be supplied from the backup power supply 9 to the ECU 10.
Claims (3)
1. A power control device mounted on a vehicle, the power control device comprising:
an ECU supplied with electric power from a battery mounted on the vehicle;
a direct current power supply that generates a control voltage from power supplied from the battery;
a backup power supply that operates using the control voltage as an operation source, supplies power to the ECU when power supply from the battery to the ECU is stopped, and supplies power to the dc power supply when power supply from the battery to the dc power supply is stopped;
a 1 st ground line connected to a ground terminal of the direct-current power supply;
a 2 nd ground line connected to a ground terminal of the backup power supply; and
and a current path forming member for electrically connecting the 1 st ground line and the 2 nd ground line to form a path through which a current flows unidirectionally from the 1 st ground line to the 2 nd ground line.
2. The power control apparatus according to claim 1,
the current path forming member includes: a diode having an anode connected to the 1 st ground line and a cathode connected to the 2 nd ground line.
3. The power control device according to claim 1 or 2,
further provided with: a connector for connecting the power control device to the battery,
wherein the 2 nd ground line is connected to a terminal of the connector,
the current path forming member is arranged in the vicinity of the connector.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-163295 | 2019-09-06 | ||
| JP2019163295A JP2021044874A (en) | 2019-09-06 | 2019-09-06 | Power control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112564257A true CN112564257A (en) | 2021-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010868470.5A Pending CN112564257A (en) | 2019-09-06 | 2020-08-26 | Power control device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2021044874A (en) |
| CN (1) | CN112564257A (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010131340A1 (en) * | 2009-05-13 | 2010-11-18 | トヨタ自動車株式会社 | Vehicle power conversion device and vehicle in which same is installed |
| JP2015073353A (en) * | 2013-10-02 | 2015-04-16 | トヨタ自動車株式会社 | Power conversion unit for electric vehicle |
| JP6365226B2 (en) * | 2014-10-22 | 2018-08-01 | トヨタ自動車株式会社 | Electric vehicle |
-
2019
- 2019-09-06 JP JP2019163295A patent/JP2021044874A/en active Pending
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2020
- 2020-08-26 CN CN202010868470.5A patent/CN112564257A/en active Pending
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| JP2021044874A (en) | 2021-03-18 |
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| PB01 | Publication | ||
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211208 Address after: Ibaraki Applicant after: Hitachi astemo Co.,Ltd. Address before: Tokyo, Japan Applicant before: KEIHIN Corp. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210326 |