FR3079687A1 - POWER SOURCE SYSTEM FOR VEHICLE - Google Patents

Abstract

A power source system includes a fast charge input (9), to which a DC power source (10) is connectable; a capacitor (31, 32, 33) in a path that interconnects a positive terminal of the fast charge input (9) and a negative terminal of the fast charge input (9); an electrical consumer (4) to which a rechargeable battery (51) is connectable; a first switch (11) in a path that interconnects a positive terminal of the fast charge input (9) and the capacitor (31, 32, 33); and a second switch (12) in a path that interconnects a negative terminal of the fast charge input (9) and the capacitor (31, 32, 33). A path that interconnects the capacitor (31, 32, 33), the first switch (11) and the second switch (12) in series, and the electrical consumer (4) are connected in parallel.Figure of the abstract: Fig. 2

Description

The present invention relates to an energy source system for a vehicle.

PRIOR ART [0002] Inverters capable of controlling and reducing noise are known to prevent noise from mixing in circuits on board vehicles. Document JP2017-184328A, hereinafter called Patent Document 1, describes a noise reduction circuit containing capacitors for the reduction of noise contained in the energy supplied to an inverter from a DC energy source. .

In the case where such a noise reduction circuit is in a charging path, a capacitor present in the circuit stores electrical energy when recharging an onboard rechargeable power supply from an installation of external charging via an input port for fast charging, which can be called a fast charging input or DC power source input. If a path to the capacitor from the fast charge input or the external charging facility were to be grounded, an electrical charge will most likely discharge from the capacitor.

Technical problem [0004] Thus, an object of the present invention is to provide an energy source system capable of preventing an undesirable discharge from a capacitor in a path which interconnects a rechargeable power supply inside a vehicle and a DC power source input.

SUMMARY OF THE INVENTION An energy source system is provided for supplying electrical energy to a rechargeable power supply in a vehicle from a DC power source external to the vehicle via an input. of a vehicle DC power source, the power source system comprising: a capacitor in a path which interconnects a positive terminal of the DC power source input and a negative terminal of the input DC power source; an electric consumer connected to the rechargeable power supply in the vehicle; a first switch in a path which interconnects the positive terminal of the DC power source input and the capacitor; and a second switch in a path which interconnects the negative terminal of the DC power source input and the capacitor, in which a path which interconnects the capacitor, the first switch and the second switch in series and the electrical consumer are connected in parallel.

According to one embodiment, the energy source system comprises: an AC / DC converter for converting energy into alternating current supplied to an AC source of energy input from the vehicle into energy into current continuous, in which the first switch is in a path which interconnects a positive terminal of the AC / DC converter and the capacitor; and the second switch is in a path which interconnects a negative terminal of the AC / DC converter and the capacitor.

According to one embodiment, the energy source system comprises: a controller for controlling the opening / closing of each of the first switch and the second switch, in which the controller switches each of the first switch and the second switch in the open state to recharge the rechargeable power supply in the vehicle with DC energy external to the vehicle via the DC energy input.

According to one embodiment, the energy source system comprises: a third switch in a path which interconnects the positive terminal of the DC energy input and a path which interconnects a positive terminal of the rechargeable power supply in vehicle and capacitor;

a fourth switch in a path which interconnects the negative terminal of the DC energy input and a path which interconnects a negative terminal of the rechargeable power supply and the capacitor; and a controller for controlling the opening / closing of each of the first switch, the second switch, the third switch and the fourth switch, wherein the controller toggles each of the first switch and the second switch in the open and toggle state each of the third switch and the fourth switch in the closed state for recharging the rechargeable power supply in the vehicle with the DC power source external to the vehicle via the DC power input.

As described above, the present invention can prevent unwanted discharge of the capacitor in the path which interconnects the rechargeable power supply and the input of the DC power source.

Brief description of the drawings [0010] Other characteristics, details and advantages of the invention will appear on reading the detailed description below, and on analysis of the appended drawings, in which:

Fig. 1 [fig.l] is a block diagram illustrating an energy source system for a vehicle;

Fig. 2 [fig.2] is a circuit diagram describing the energy source system;

Fig. 3 [fig.3] is a timing diagram of the energy source system.

Description of the Embodiments An energy source system for providing electrical energy to a rechargeable power supply in a vehicle from a DC power source external to the vehicle via an input is disclosed. of a vehicle DC power source, the power source system comprising: a capacitor in a path which interconnects a positive terminal of the DC power source input and a negative terminal of the input DC power source; an electric consumer connected to the rechargeable power supply in the vehicle; a first switch in a path which interconnects the positive terminal of the DC power source input and the capacitor; and a second switch in a path which interconnects the negative terminal of the DC power source input and the capacitor, in which a path which interconnects the capacitor, the first switch and the second switch in series and the electrical consumer are connected in parallel.

As described above, the present invention can prevent unwanted discharge of the capacitor in the path which interconnects the rechargeable power supply and the input of the DC power source.

[Mode (s) of Production] With reference to the accompanying drawings, the present implementation of an energy source system according to the invention is described.

In Figure 1, the reference 1 generally denotes a vehicle provided with an energy source system. The vehicle 1 comprises an inverter 3, an electrical consumer 4, a battery pack 5 and a controller 6.

The motor 2 is in the form, for example, of a synchronous motor, which comprises a rotor incorporating a number of permanent magnets and a stator comprising stator coils. Applying three-phase alternating voltages to the stator coils causes the stator to generate a rotating magnetic field, which passes through the rotor to create torque.

The controller 6 commands the inverter 3 to controllably apply three-phase alternating voltages to the motor 2. The inverter 3 creates a three-phase alternating voltage in response to a torque command supplied to it by the controller 6 and supplies it to motor 2.

The electric consumer 4 includes all kinds of devices which are mounted on the vehicle 1 and activated by electric energy from the battery pack 5. Examples of such devices are an audio system, a navigation system, an air conditioner , a display system of a counter and lamps such as headlights.

The battery pack 5 is designed to supply electrical energy to the inverter 3 and the electrical consumer 4. The battery pack 5 comprises, as an energy source, a rechargeable battery 51 (see FIG. 2) which can be in the form of a nickel battery or a lithium battery.

Regarding the battery pack 5, the inverter 3 and the electrical consumer 4 are connected in parallel. An AC / DC converter 7 (Alternating Current / Direct Current or in English AC / DC) is connected to the battery pack 5 in parallel with the inverter 3 and the electrical consumer 4. The AC / DC converter 7 can convert alternating current , which can be supplied to an AC power input 8, direct current.

The battery 51 (see Figure 2) is recharged with electrical energy from a DC power source 10 by coupling a charging connector for a DC power source 10 external to the vehicle 1 with a fast charge input 9 for the battery pack 5. The fast charge input 9 detects whether the charge connector for the DC power source 10 is coupled with the fast charge input 9 and informs the controller 6 of the detection result.

The battery pack 5 includes a voltage sensor, a temperature sensor and a current sensor, which are not illustrated. The voltage sensor is designed to detect a voltage of the battery 51 (see FIG. 2). The temperature sensor is designed to detect a temperature of the battery 51. The current sensor is designed to detect a charging current to the battery 51 and a discharge current from the battery 51.

The controller 6 is a computer unit which includes a central processing unit (in English Central Processing Unit or CPU), a random access memory (in English Random Access Memory or RAM), a read only memory (in English Read-Only Memory or ROM), flash memory, input ports, and output ports.

The controller ROM 6 stores computer readable programs, which allow the computer unit to operate as a controller 6, as well as various control constants and various cards. So when the CPU executes the programs stored in the ROM, the computer unit functions as a controller

6.

Various sensors, which include the fast charge input 9, the voltage sensor, the temperature sensor and the current sensor, are connected to the input ports of the controller 6. On the other hand, various objects of control, comprising the inverter 3, the electrical consumer 4 and the battery pack 5, are connected to the output ports of the controller 6.

Referring to FIG. 2, the inverter 3 includes a noise reduction circuit. The noise reduction circuit contains a capacitor 31, a capacitor 32 and a capacitor 33 to reduce the noise contained in the electrical energy supplied to the inverter 3.

A first switch 11 is in a path which interconnects the positive terminal of the fast charge input 9 and the inverter 3. A second switch 12 is in a path which interconnects the negative terminal of the charge input fast 9 to inverter 3.

The first switch 11, the inverter 3 and the second switch 12 are connected in series. Thus, the path which interconnects the above-mentioned components in series and the electrical consumer 4 are connected in parallel.

A third switch 13 is in a path which interconnects the positive terminal of the fast charge input 9 and a path which interconnects the positive terminal of the battery 51 and the inverter 3. A fourth switch 14 is in a path which interconnects the negative terminal of the fast charge input 9 and a path which interconnects the negative terminal of the battery 51 and the inverter 3.

The positive terminal of the AC / DC converter 7 is connected to the path which interconnects the positive terminal of the battery 51 and the inverter 3. The negative terminal of the AC / DC converter 7 is connected to the path which interconnects the negative terminal of the battery 51 and the inverter 3.

A fifth switch 15 is connected to the positive terminal of the battery 51. A sixth switch 16 is connected to the negative terminal of the battery 51.

The controller 6 controls the closed state / the open state (in English ON / OFF) of each of the first switch 11, the second switch 12, the third switch 13, the fourth switch 14, the fifth switch 15 and of the sixth switch 16.

The controller 6 switches each of the first switch 11 and the second switch 12 to the open state (OFF) in anticipation of the detection of the coupling of a charge connector for the DC power source 10 outside the vehicle 1 with fast charge input 9.

The controller 6 toggles each of the third switch 13 and the fourth switch 14 in the closed state (ON) in response to the detection of the coupling of the charge connector for the DC power source 10 external to the vehicle 1 with fast charge input 9.

The controller 6 toggles each of the fifth switch 15 and the sixth switch 16 in the closed state (ON) in response to the detection of the coupling of the charge connector for the DC power source 10 external to the vehicle 1 with fast charge input 9.

The configuration described above can isolate the capacitors 31, 32 and 33 from the charging path during the charging period from the fast charging input 9, thereby stopping the discharge of the capacitors 31, 32 and 33. Due from the absence of discharge of the capacitors 31, 32 and 33, the path of the capacitors 31, 32 and 33 to the fast charge input 9 or to the installation of charging the current energy source continuous 10 is less likely to experience a current leak.

In addition, with the first switch 11, the inverter 3 and the second switch 12 which are connected in series and the electrical consumer 4 connected in parallel, a power source is supplied to the electrical consumer 4 even when each of the first switch 11 and the second switch 12 is toggled to the open state (OFF), allowing the electrical consumer 4 such as an air conditioner or a heater to operate during the vehicle charging period 1 from the input of fast charge 9.

Referring now to Figure 3, the power source system, to which this implementation relates and which is configured as described above, operates as follows.

In Figure 3, at time tl at which the ignition switch is disabled, the first switch 11 and the second switch 12 are disabled.

Then, at time t2, the fast charge input 9 is supplied (with energy) once the start-up procedure for recharging the battery 51 has started, by coupling the charge connector for an energy source. direct current external to vehicle 1 with fast charge input 9.

At time t3 after the fast charge input 9 has been supplied at time t2, the third switch 13 and the fourth switch 14 are activated to establish (or close) the charge path.

Then, at time t4, the fast charge input 9 is not supplied (that is to say that it is without power) when reaching a satisfactory level of recharging of the battery 51. At time t5 after time t4, the third switch 13 and the fourth switch 14 are deactivated to interrupt (or open) the charging path.

Then, at time t6, when the ignition switch is activated, the first switch 11 and the second switch 12 are activated, allowing the battery 51 to supply energy to the inverter 3 and to the electrical consumer 4.

Although the disclosure relates to, but is not limited to, the present embodiment, it will be clear to those skilled in the art that modifications can be made without departing from the scope of the present invention. All of these modifications and their equivalents are intended to be covered by the present invention.

List of reference signs - 1 vehicle;

- 4 electrical consumers;

- 6 controller;

- 7 AC / DC converter;

- 8 alternating current energy input, which, in the present implementation, is in the form of an input port for alternating current energy;

- 9 direct current energy input, which, in the present implementation, is in the form of a fast charge input, that is to say an input port for fast charge;

- 10 direct current energy source;

- 11 first switch;

- 12 second switch;

- 13 third switch;

- 14 fourth switch;

- 31, 32, 33 capacitor;

- 51 rechargeable power supply, which, in the present implementation, is in the form of a battery.

List of cited documents Patent documents For all practical purposes, the following patent document (s) is (are) cited:

- Patent document 1: JP2017-184328A.

Claims (1)

claims [Claim 1] An energy source system for supplying electrical energy to a rechargeable power supply (51) in a vehicle (1) from a DC power source (10) external to the vehicle (1) via a DC power source input (9) of the vehicle (1), the power source system comprising: a capacitor (31, 32, 33) in a path which interconnects a positive terminal of the DC power source input (9) and a negative terminal of the DC power source input (9 ) an electric consumer (4) connected to the rechargeable power supply (51) in the vehicle (1); a first switch (11) in a path which interconnects the positive terminal of the DC power source input (9) and the capacitor (31, 32, 33); and a second switch (12) in a path which interconnects the negative terminal of the DC power source input (9) and the capacitor (31, 32, 33), in which a path, which interconnects the capacitor (31, 32, 33), the first switch (11) and the second switch (12) in series, and the electrical consumer (4) are connected in parallel. [Claim 2] The power source system of claim 1, comprising: an AC / DC converter (7) for converting AC power supplied to an AC power source input (8) of the vehicle (1 ) in direct current energy, in which the first switch (11) is in a path which interconnects a positive terminal of the AC / DC converter (7) and the capacitor (31, 32, 33); and the second switch (12) is in a path which interconnects a negative terminal of the AC / DC converter (7) and the capacitor (31, 32, 33). [Claim 3] The energy source system according to claim 1 or 2, comprising: a controller (6) for controlling the opening / closing of each of the first switch (11) and the second switch (12), wherein the controller (6) toggles each of the first switch [Claim 4] (11) and the second switch (12) in the open state for recharging the rechargeable power supply (51) in the vehicle (1) with direct current energy (10) external to the vehicle (1) via the direct current energy input (9). The energy source system according to claim 1 or 2, comprising: a third switch (13) in a path which interconnects the positive terminal of the direct current energy input (9) and a path which interconnects a positive terminal of the rechargeable power supply (51) in the vehicle (1) and the capacitor (31, 32 33); a fourth switch (14) in a path which interconnects the negative terminal of the DC power input (9) and a path which interconnects a negative terminal of the rechargeable power supply (51) and the capacitor (31, 32 , 33); and a controller (6) for controlling the opening / closing of each of the first switch (11), the second switch (12), the third switch (13) and the fourth switch (14), wherein the controller (6 ) each switches between the first switch (11) and the second switch (12) in the open state and each switches between the third switch (13) and the fourth switch (14) in the closed state to recharge the rechargeable power supply (51) in the vehicle (1) with the DC energy source (10) external to the vehicle (1) via the DC energy input (9).