JPWO2013061507A1 - Battery status display device for starting engine and vehicle equipped with the same - Google Patents

Abstract

  The battery status display device is provided in the vicinity of the battery (1), is attached to a status detector (5) that receives power from the battery (1), and a socket (3) for a cigarette lighter of the vehicle. And a socket device (6) that receives power from the battery (1). The state detector (5) relates to the state of the detected battery via the battery detection units (21 to 23) that detect information about the state of the battery (1) and the power line connected to the battery (1). And a transmission unit (14) that transmits information as detection information to the socket device (6). The socket device (6) includes a receiving unit (52) that receives detection information transmitted from the state detector (5) via a power line, and a state display unit that displays the state of the battery (1) based on the detection information. (71 to 75) and a notification unit (76, 77) for notifying the user of the completion of reception of the detection information when the reception unit (52) completes reception of the detection information.

Description

  The present invention relates to a battery status display device for starting an engine provided in a vehicle having an engine as a main power source, and a vehicle including the same.

  The largest number of troubles with private cars (specifically, the number of dispatches of the Japan Automobile Federation) is battery exhaustion and battery deterioration. Various battery status display devices have been developed so that such battery troubles can be detected and dealt with in advance. Many of these battery status display devices are built in the battery or installed near the battery, and display the status of the battery in a bar graph or the like. However, since the battery is usually mounted in the engine room, it is difficult for the driver to check the battery status display device on a daily basis.

  In order to solve these problems, the battery status display device is divided into a detector that detects the battery status and a display that displays the battery status, and the indicator is mounted on the cigarette lighter socket in the passenger compartment. A method of displaying the state of the battery has been proposed. In order to adopt such a configuration, it is necessary to configure the battery detector and the display so that they can communicate with each other, and to transmit information about the battery from the detector to the display. As one of the methods, for example, Patent Document 1 proposes power line communication.

  Patent Document 2 shows a case where information to be communicated is not battery information but navigation information. That is, power line communication is performed between the in-vehicle device and the information device connected to the cigarette lighter socket. Patent Documents 3 and 4 also disclose an apparatus that performs power line communication between an in-vehicle device and a device connected to a cigarette lighter socket. In this case, power line communication is performed between the gateway device, which is an in-vehicle device, and a retrofit ETC device.

JP 2009-149250 A JP 2007-255938 A JP 2003-163618 A JP 2004-343796 A

  In power line communication, there may be a case where stable communication cannot be achieved due to noise generated from other electric devices, capacity components held by the electric devices, or the like. For this reason, the transmitted information may not be received. For example, Patent Documents 3 and 4 describe the selection of a communication frequency suitable for the impedance of the power line and the provision of a filter having an appropriate frequency on the communication line in order to improve the communication state of the power line communication. Yes. However, noise generated by an engine, a blower fan, or the like may not be sufficiently removed by a filter. On the other hand, in the apparatuses described in Patent Documents 1 to 4, there is no method for a user to confirm that transmitted information can be properly received.

  The present invention has been made to solve the above-described problems, and in a power line communication, a battery status display device capable of properly confirming transmitted information and a vehicle including the same can be confirmed by a user. The purpose is to provide.

  A battery status display device according to an aspect of the present invention is a battery status display device that is provided in a vehicle having an engine as a main power source and displays a status of a battery for starting the engine, and is in the vicinity of the battery. A state detector that receives power from the battery, and a socket device that is mounted on a cigarette lighter socket of the vehicle and receives power from the battery via the socket, the state detector includes: A battery detection unit that detects information related to a battery state, and transmits information related to the battery state detected by the battery detection unit to the socket device as detection information via a power supply line connected to the battery. The socket device is transmitted from the state detector via the power line. A receiving unit that receives the detection information, a state display unit that displays the state of the battery based on the detection information received by the receiving unit, and when the receiving unit completes reception of the detection information, A notification unit that notifies the user of the completion of reception of the detection information.

  The vehicle according to an aspect of the present invention includes an ignition configured to switch the battery status display device, the engine, the battery, the socket, and a key operation position between an OFF position, an ACC position, and an ON position. When the key operation position is in the OFF position, power is not supplied from the battery to the socket, and when the key operation position is in the ACC position, power is supplied from the battery to the socket; and When the engine is stopped and the key operation position is in the ON position, power is supplied from the battery to the socket, and the engine is operating.

  According to the present invention, when displaying the detection information of the state detector on the state display unit of the socket device attached to the socket for the cigarette lighter, the user displays the battery displayed on the state display unit by the notification unit. It can be confirmed that the state of is the latest state.

It is a figure which shows typically the battery status display apparatus of one Embodiment of this invention mounted in the vehicle which uses an engine as a main power source. It is a block diagram which shows the structure of a state detector. It is a block diagram which shows the structure of a socket apparatus. It is a figure which shows an example of the change of the voltage of the battery before and behind engine starting. It is a figure which shows an example of the change of the voltage of the battery before and behind an engine stop. It is a timing chart which shows a user's operation in this embodiment, a state of vehicles, and a state of power line communication. It is a timing chart which shows a user's operation in this embodiment, a state of vehicles, and a state of power line communication. It is a figure which shows an example of a structure of the communication packet of display information and log | history information in this embodiment. It is a figure which shows the reception rate of log | history information and display information in a table format. It is a flowchart which shows an example of operation | movement of a socket apparatus. It is a flowchart which shows another example of operation | movement of a socket apparatus. It is a figure which shows typically the state which connected the socket apparatus and the information processing terminal. It is a figure which shows typically the state which connected the information processing terminal to the socket apparatus inserted in the socket of the vehicle via the USB cable. It is a block diagram which shows the structure of the socket apparatus in a deformation | transformation form. It is a timing chart which shows a user's operation in the modification shown by Drawing 14, a state of vehicles, and a state of power line communication. It is a block diagram which shows the structure of the socket apparatus in another modification.

  Hereinafter, a preferred example of an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  FIG. 1 is a diagram schematically showing a battery status display device according to an embodiment of the present invention mounted on a vehicle having an engine as a main power source. In FIG. 1, a battery 1 includes a positive terminal 1a and a negative terminal 1b. The electric power output from the battery 1 is used to drive a starter motor that starts the engine 7 of the vehicle. The alternator 2 is a generator that is connected to the battery 1 by wires 2 a and 2 b and is driven by the engine 7. When the amount of power generated by the alternator 2 exceeds the electric load of the vehicle, the battery 1 is charged by the power generated by the alternator 2.

  The socket 3 is a cigar lighter socket that is provided as a standard in the vehicle, and includes a positive terminal 3a and a negative terminal 3b. The positive terminal 3 a of the socket 3 is connected to the positive terminal 1 a of the battery 1 through the ignition switch 4 by the wiring 3 c. The negative terminal 3b of the socket 3 is connected to the negative terminal 1b of the battery 1 by a wiring 3d. As is well known, when the key operation position of the key 4a of the ignition switch 4 is in the OFF position, the positive terminal 3a of the socket 3 and the positive terminal 1a of the battery 1 are disconnected, and the key 4a of the ignition switch 4 When the operation position is a position other than the OFF position (that is, the ACC position, the ON position, and the START position), the positive terminal 3a of the socket 3 and the positive terminal 1a of the battery 1 are electrically connected.

  That is, when the key operation position of the key 4a of the ignition switch 4 is in the OFF position, the positive terminal 3a of the socket 3 and the positive terminal 1a of the battery 1 are disconnected, and the engine 7 is stopped. When the key operation position of the key 4a of the ignition switch 4 is in the ACC position, the positive terminal 3a of the socket 3 and the positive terminal 1a of the battery 1 are electrically connected, power is supplied to accessories such as a radio, and the engine 7 Has stopped. When the key operation position of the key 4a of the ignition switch 4 is in the ON position, the positive terminal 3a of the socket 3 and the positive terminal 1a of the battery 1 are electrically connected, power is supplied to accessories such as a radio, and the engine 7 Is working. When the key operation position of the key 4 a of the ignition switch 4 is the START position, the engine 7 is started by the starter motor supplied with power from the battery 1.

  The battery status display device shown in FIG. 1 includes a status detector 5 and a socket device 6. The state detector 5 is connected to the positive terminal 1a of the battery 1 via the lead wire 5a, and is connected to the negative terminal 1b of the battery 1 via the lead wire 5b. The socket device 6 is configured to be detachable from the socket 3. Accordingly, the socket device 6 receives power from the battery 1 via the socket 3 when the key operation position of the ignition switch 4 is set to a position other than the OFF position while being mounted in the socket 3.

  FIG. 2 is a block diagram showing the configuration of the state detector 5. The state detector 5 includes a constant voltage power supply unit 11, a battery state detection unit 12, a display unit 13, and a power line communication unit 14. The constant voltage power supply unit 11 receives power supply from the battery 1 and generates a predetermined DC voltage (for example, +3.3 V) in order to drive the entire state detector 5. The constant voltage power supply unit 11 supplies power to the battery state detection unit 12, the display unit 13, the power line communication unit 14, and the like.

  The battery state detection unit 12 includes an A / D conversion unit 21, a temperature sensor 22, a calculation control unit 23, and a nonvolatile memory 24. The nonvolatile memory 24 includes a specification storage unit 25 and a history storage unit 26. The display unit 13 includes light emitting diodes (LEDs) 31, 32, 33 for displaying a deterioration state, an LED 34 for displaying insufficient charge, and an LED 35 for displaying overcharge. The LED 31 is, for example, green, the LED 32 is, for example, yellow, and the LED 33 is, for example, red.

  The A / D conversion unit 21 is connected to the lead wires 5 a and 5 b, converts the voltage of the battery 1 into a digital value, and outputs the digital value to the arithmetic control unit 23. The A / D conversion unit 21 converts the temperature near the battery 1 detected by the temperature sensor 22 into a digital value and outputs the digital value to the arithmetic control unit 23. Information related to the specifications of the battery 1 is stored in the specification storage unit 25. Information relating to the history of the battery 1 is stored in the history storage unit 26.

  The calculation control unit 23 determines the state of the battery 1 based on the voltage of the battery 1 output from the A / D conversion unit 21 and the temperature near the battery 1 while referring to the information in the specification storage unit 25. The arithmetic control unit 23 controls the display operation of the display unit 13 based on the determination result of the state of the battery 1. The arithmetic control unit 23 cumulatively stores the determination result of the state of the battery 1 in the history storage unit 26 as the history information of the battery 1. The arithmetic control unit 23 outputs the display information of the display unit 13 and the history information of the battery 1 stored in the history storage unit 26 to the power line communication unit 14 as detection information regarding the state of the battery 1.

  The calculation control unit 23 determines the deterioration level, whether the battery 1 is overcharged, whether it is overcharged, whether it is insufficiently charged, and the like. The arithmetic control unit 23 determines the deterioration state of the battery 1 mainly when the engine 7 is started. That is, the arithmetic control unit 23 determines a deterioration level of the battery 1 by grasping a situation where the starting voltage of the engine 7 decreases with time.

  In addition, the arithmetic control unit 23 determines the presence or absence of overcharge based on the voltage of the battery 1 while the vehicle is traveling. That is, the arithmetic control unit 23 determines that the battery 1 is overcharged when the voltage of the battery 1 is higher than the normal range. In addition, the arithmetic control unit 23 determines that the battery is overdischarged when the voltage of the battery 1 is less than or equal to a specified value while the vehicle is running or stopped.

  The arithmetic control unit 23 cumulatively stores these determination results in the history storage unit 26 periodically or triggered by a change in the state of the battery 1. Note that the calculation control unit 23 may determine the state of the battery 1 in consideration of past history information stored in the history storage unit 26.

  The arithmetic control unit 23 controls the display unit 13 based on the latest information on the determination result. That is, when the arithmetic control unit 23 determines that the battery 1 has not deteriorated, the arithmetic control unit 23 turns on the green LED 31. If the arithmetic control unit 23 determines that the battery 1 has deteriorated and should be prepared to replace the battery 1, the arithmetic control unit 23 turns on the yellow LED 32. If the calculation control unit 23 determines that the battery 1 has deteriorated and the battery 1 needs to be replaced, the arithmetic control unit 23 turns on the red LED 33. When the arithmetic control unit 23 determines that the battery 1 is insufficiently charged, the arithmetic control unit 23 turns on the LED 34. If the arithmetic control part 23 determines with the battery 1 being overcharged, it will light the LED35.

  The power line communication unit 14 includes a data interface 36, a modulation unit 37, and a band pass filter 38. The data interface 36 receives display information of the display unit 13 and history information of the battery 1 output from the calculation control unit 23 as transmission data. The data interface 36 gives a code for error correction necessary for transmission and a number of the transmission data to the transmission data. The modulation unit 37 converts digital signal transmission data into analog signal transmission data by, for example, BPSK modulation. The modulation unit 37 further amplifies the transmission data of the converted analog signal, and applies it to the lead wires 5a and 5b connected to the terminals 1a and 1b of the battery 1 through the band pass filter 38, respectively.

  The power line communication unit 14 transmits the display information output from the calculation control unit 23 and the history information of the battery 1 to the socket device 6 as detection information related to the state of the battery 1 at a predetermined timing (described later). The power line communication unit 14 transmits the display information of the display unit 13 and the history information of the battery 1 separately.

  FIG. 3 is a block diagram showing a configuration of the socket device 6. In the socket device 6, the rear end side inserted into the socket 3 is formed in a spindle shape, and the front end side surface is formed in a flat plate shape. The socket device 6 includes a positive terminal 41, a negative terminal 42, a slave-side USB connector terminal 43 provided on a spindle-shaped portion, and a master-side USB connector terminal 44 provided on the surface. When the socket device 6 is inserted into the socket 3, the positive terminal 41 and the negative terminal 42 come into contact with the positive terminal 3 a and the negative terminal 3 b of the socket 3, respectively. The socket device 6 obtains a power source for operation through the positive terminal 41 and the negative terminal 42 and receives information related to the battery 1 through power line communication.

  The socket device 6 further includes a constant voltage power supply unit 51, a power line communication unit 52, an arithmetic processing unit 53, and a display unit 54. The constant voltage power supply unit 51 is connected to the positive terminal 41 and the negative terminal 42. The constant voltage power supply unit 51 receives power supply from the battery 1 via the terminals 41 and 42 and generates a predetermined DC voltage (for example, +3.3 V) in order to drive the entire socket device 6. The constant voltage power supply unit 51 supplies power to the power line communication unit 52, the arithmetic processing unit 53, the display unit 54, and the like.

  The power line communication unit 52 includes a band pass filter 61, a demodulation unit 62, and a data interface 63. The band pass filter 61 is connected to the positive terminal 41 and the negative terminal 42. The bandpass filter 61 extracts an AC component (for example, 2 MHz) having a frequency that serves as a communication baseband, and outputs the AC component to the demodulator 62. The demodulator 62 converts the received analog signal reception data into digital signal reception data, and outputs the converted digital signal reception data to the data interface 63. The data interface 63 performs processing such as error detection, correction, and data address restoration on the received data. By receiving these processes, the received data becomes data having the same normal configuration as that read from the memory. The data interface 63 outputs this data to the arithmetic processing unit 53.

  The arithmetic processing unit 53 includes an A / D conversion unit 64, an arithmetic control unit 65, and a nonvolatile memory 66. The nonvolatile memory 66 includes a history information storage unit 67 and a display information storage unit 68. The display unit 54 is provided on the surface of the socket device 6. The display unit 54 includes LEDs 71, 72, and 73 for displaying deterioration states, an LED 74 for displaying insufficient charge, an LED 75 for displaying overcharge, an LED 76 for displaying reception completion of display information, and an LED 77 for displaying completion of receiving history information. Including. The LED 71 is, for example, a green LED, the LED 72 is, for example, yellow, and the LED 73 is, for example, red. The LEDs 76 and 77 are blue, for example.

  The A / D converter 64 is connected to the positive terminal 41 and the negative terminal 42. The A / D conversion unit 64 converts the voltage of the battery 1 input via the positive terminal 41 and the negative terminal 42 into a digital value, and outputs the converted digital voltage value of the battery 1 to the arithmetic control unit 65. The calculation control unit 65 stores the display information in the display information storage unit 68 among the detection information of the battery 1 transmitted from the state detector 5 and received by the power line communication unit 52, and stores the history information of the battery 1 as history information. Save in the storage unit 67.

  If the arithmetic control unit 65 determines that the voltage of the battery 1 is abnormally low and the engine 7 cannot be started based on the voltage value output from the A / D conversion unit 64, the undercharge indicator LED 74 is turned on. To do. As described above, when the abnormality of the battery 1 is detected before the detection information regarding the battery 1 is received through the power line communication, the arithmetic control unit 65 turns on the LED 74 and immediately determines that the battery 1 is abnormal. indicate.

  When the voltage of the battery 1 is within the normal range, the arithmetic control unit 65 displays the display unit 54 based on the detection information of the battery 1 received by the power line communication unit 52 and the display information stored in the display information storage unit 68. To control.

  When the information indicates that the battery 1 has not deteriorated, the arithmetic control unit 65 turns on the green LED 71. The arithmetic control unit 65 turns on the yellow LED 72 when the information indicates that the battery 1 has deteriorated and should be prepared for replacement of the battery 1. The arithmetic control unit 65 turns on the red LED 73 when the information indicates that the battery 1 is deteriorated and needs to be replaced.

  If the arithmetic control unit 65 determines that the battery 1 is overcharged based on the voltage value output from the A / D conversion unit 64, the arithmetic control unit 65 turns on the LED 75. The arithmetic control unit 65 turns off the LEDs 76 and 77 when the power is turned on. The arithmetic control unit 65 turns on the LED 76 when the reception of the display information transmitted from the state detector 5 is completed after the power is turned on. The calculation control unit 65 turns on the LED 77 when the reception of the history information transmitted from the state detector 5 is completed after the power is turned on. In the present embodiment, the completion of reception is notified to the user by turning on the LEDs 76 and 77, but alternatively, the reception completion may be notified to the user by voice.

  In the present embodiment, the A / D conversion unit 21, the temperature sensor 22, and the calculation control unit 23 constitute an example of a battery detection unit. In the present embodiment, the power line communication unit 52 corresponds to an example of a reception unit, the LED 76 corresponds to an example of a notification unit and a first notification unit, and the LED 77 corresponds to an example of a notification unit and a second notification unit. The arithmetic control unit 65 corresponds to an example of a storage control unit. Moreover, in this embodiment, the calculation control part 65 and LED71-75 comprise an example of a status display part.

  FIG. 4 is a diagram illustrating an example of a change in the voltage of the battery 1 before and after the engine is started. The transmission timing at which the power line communication unit 14 of the state detector 5 transmits detection information related to the state of the battery 1 will be described with reference to FIGS. 1, 2, and 4.

  When the engine 7 is started, the key operation position of the key 4a in the ignition switch 4 of the vehicle changes in the order of OFF position, ACC position, ON position, START position, ON position. Accordingly, the voltage of the battery 1 fluctuates by V1 = about 50 mV when the key operation position is first switched from the OFF position to the ACC position. Furthermore, when the key operation position is changed from the ACC position to the ON position, V2 changes by about 100 mV. Further, when the key operation position transitions from the ON position to the START position, V3 = 4 to 5V greatly varies.

  In the present embodiment, the power line communication unit 14 stops transmission while the engine 7 is stopped, that is, while the key operation position of the key 4a in the ignition switch 4 is set to the OFF position. And the power line communication part 14 will start power line communication, if the voltage fluctuation of said V1 = 50mV is detected.

  The state detector 5 is always connected to the battery 1 and is supplied with electric power. However, since the socket device 6 is disconnected from the battery 1 while the key operation position of the ignition switch 4 is in the OFF position (that is, while the engine 7 is stopped), the socket device 6 cannot receive. For this reason, even if transmission is performed from the state detector 5 while the engine 7 is stopped, it is useless. Therefore, the state detector 5 shifts to a sleep mode or the like while the engine 7 is stopped to reduce power consumption.

  During the sleep mode of the state detector 5 (while the engine 7 is stopped), the calculation control unit 23 of the battery state detection unit 12 passes through the A / D conversion unit 21 every predetermined period (for example, 100 to 200 msec). The voltage of the battery 1 is detected. The calculation control unit 23 compares the detection value with the previous detection value every time the voltage of the battery 1 is detected. As a result of the comparison of the detected values, the arithmetic control unit 23 detects a voltage fluctuation range of V1 = 50 mV (corresponding to a predetermined width) or more, and the key operation position of the key 4a in the ignition switch 4 is changed from the OFF position to the ACC position. It is determined that it has been switched.

  When the arithmetic control unit 23 determines that the key operation position has been switched from the OFF position to the ACC position, the calculation control unit 23 outputs detection information (display information and history information) to the power line communication unit 14 and controls the power line communication unit 14. The detection information is transmitted from the power line communication unit 14 to the socket device 6. In the present embodiment, the power line communication unit 14 and the calculation control unit 23 constitute an example of a transmission unit.

  The cycle in which the calculation control unit 23 detects the voltage of the battery 1 while the engine 7 is stopped is not limited to 100 to 200 msec. The period may be, for example, 1 to 2 seconds, and may be any period that can detect a voltage variation that occurs when the key operation position is switched from the OFF position to the ACC position.

  Note that the power line communication unit 14 continues to transmit even during the operation of the engine 7 where the voltage fluctuation of the battery 1 is large, but since the alternator 2 generates power during this period, the battery by performing the transmission There is almost no power consumption of 1. By the way, as an average use situation of a normal vehicle, if the annual travel distance is 10,000 km and the average travel speed is 20 km / h, the average travel time is 500 h / year (that is, 1.4 h / day). That is, it can be estimated that the engine 7 is stopped for 22.6 h / day. When communication is continued while the engine 7 is stopped, if the current consumption is 50 mA, the power of the battery 1 is consumed about 1 Ah per day. As a result, the capacity of the battery 1 is completely lost in a few weeks. From the above estimation, it can be easily understood that a large effect can be obtained if communication is not performed while the engine 7 is stopped.

  As described above, in the present embodiment, the state detector 5 cancels the sleep mode and starts transmission when a change in the voltage of the battery 1 exceeding a predetermined width is detected. It is not only when the key operation position of the key 4a in the ignition switch 4 is switched from the OFF position to the ACC position that the voltage of the battery 1 fluctuates by a predetermined width or more. Even when the user performs an operation involving the power consumption of the battery 1 to any vehicle, for example, an operation of unlocking the door by a keyless entry system, the voltage of the battery 1 fluctuates more than a predetermined width. However, even in this case, the probability that the user starts the engine 7 within a short time is high. That is, there is a high probability that the period during which the detection information is wastedly transmitted from the state detector 5 without the socket device 6 being fed is short. Therefore, even when the state detector 5 starts transmission in response to the unlocking operation of the door, the amount of power consumed by the battery 1 is reduced.

  As the engine 7 is started, the key operation position of the key 4a in the ignition switch 4 moves to the ACC position, the ON position, or the START position. Therefore, it is desirable if the state detector 5 starts transmission at the time when it is detected that the voltage of the battery 1 has fluctuated by a predetermined width or more, because the load on the battery 1 can be reduced while improving the success rate of communication. In particular, when there is no bi-directional communication function between the state detector 5 and the socket device 6, it is difficult for the state detector 5 to know when the socket device 6 is connected to the battery 1. It is. For this reason, even if the socket device 6 is not connected to the battery 1, if the transmission state is maintained, the current required for communication becomes several tens of mA, and the power consumption of the battery 1 increases.

  On the other hand, in this embodiment, when the voltage of the battery 1 fluctuates by a predetermined width or more, the state detector 5 starts transmission by predicting that the socket device 6 is connected to the battery 1. As a result, in this embodiment, compared to the case where the state detector 5 continuously transmits while the engine 7 is stopped, it is not necessary to perform unnecessary transmission, and it is possible to prevent power consumption of the battery 1 and to reduce communication power. You can increase the success rate.

  FIG. 5 is a diagram illustrating an example of a change in the voltage of the battery 1 before and after the engine is stopped. The transmission end timing from the power line communication unit 14 of the state detector 5 will be described with reference to FIGS. 1, 2, and 5.

  FIG. 5 shows the battery 1 when the key operation position of the key 4a in the ignition switch 4 is in the ON position and the engine 7 is operating, and then the key operation position changes in the order of the ACC position and the OFF position. The change in voltage is shown. In the ON period shown in FIG. 5, the engine 7 is operating, electric power is supplied from the alternator 2 to each load of the vehicle, and the battery 1 is charged by the electric power from the alternator 2. Will not drop. Also, because the engine 7 is operating during this ON period. As shown in FIG. 5, for example, noise generated by a spark plug of the engine 7 is superimposed on the voltage of the battery 1.

  When the key operation position of the ignition switch 4 transitions from the ON position to the ACC position, the engine 7 is stopped, so that noise superimposed on the voltage of the battery 1 is reduced. Further, since the alternator 2 is stopped, electric power is supplied from the battery 1 to each load of the vehicle, and charging by the electric power from the alternator 2 is stopped, the voltage level of the battery 1 is as shown in FIG. Decrease gradually.

  Furthermore, when the key operation position transitions from the ACC position to the OFF position, the voltage decrease rate of the battery 1 is slightly reduced. This is because the load of the electrical component that is energized when the key operation position is the ACC position is disconnected from the battery 1 when the load is turned to the OFF position. Energization of the socket device 6 is also interrupted when the key operation position transitions from the ACC position to the OFF position. However, it is extremely difficult to detect a change in the voltage drop rate as shown in FIG. 5 at the transition from the ACC position to the OFF position.

  Therefore, in the present embodiment, the calculation control unit 23 of the battery state detection unit 12 of the state detector 5 starts from the ON position of the key operation position based on the voltage value of the battery 1 output from the A / D conversion unit 21. Detect a transition to a position. Specifically, the calculation control unit 23 determines that the operation position of the key 4a of the ignition switch 4 has transitioned from the ON position to the ACC position when the voltage level of the battery 1 starts to decrease from a substantially constant state. To do.

  The arithmetic control unit 23 counts the elapsed time from the detection time point of the transition from the ON position of the key operation position to the ACC position, and stops transmission from the power line communication unit 14 after a predetermined time T1 has elapsed. As a result, wasteful power line communication while the engine 7 is stopped can be prevented, so that the discharge of the battery 1 can be effectively suppressed. In the present embodiment, T1 = 30 seconds, but the present invention is not limited to this. For example, another value such as T1 = 10 seconds may be set.

  6 and 7 are timing charts showing user operations, vehicle states, and power line communication states in this embodiment. FIG. 6 shows a case where a general vehicle is traveling, and FIG. 7 shows a case where the door is just unlocked. The transmission start timing and transmission end timing from the power line communication unit 14 of the state detector 5 will be described with reference to FIGS. 1, 2, 6, and 7.

  In FIG. 6, when the engine 7 is stopped, the state detector 5 is connected to the power line at time t1 when the voltage fluctuation range of the battery 1 becomes equal to or greater than a predetermined value V1 (V1 = 50 mV in this embodiment) due to unlocking of the door. Start communication. Thereafter, the engine 7 is started and the state where the noise superimposed on the voltage of the battery 1 continues to be large, but the power line communication is continued. And the state detector 5 complete | finishes power line communication at the time t3 when only the predetermined time T1 passed from the time t2 when the key operation position of the ignition switch 4 changed from the ON position to the ACC position. Thereby, useless power line communication can be prevented for most of the time when the engine 7 is stopped and stopped.

  7, at the time t11 when the voltage fluctuation range of the battery 1 becomes equal to or larger than the predetermined value V1 (in this embodiment, V1 = 50 mV) by unlocking the door while the engine 7 is stopped, as in FIG. The detector 5 starts power line communication. However, when the engine 7 is not started, the state detector 5 stops the power line communication at time t12 when a predetermined time T2 has elapsed from time t11. Thereby, useless power line communication can be prevented for most of the time when the engine 7 is stopped and stopped. In the present embodiment, for example, T2 = 30 seconds, but this is not a limitation. For example, another value such as T2 = 1 minute may be set.

  As described above, in the present embodiment, when the voltage fluctuation range of the battery 1 becomes equal to or larger than the predetermined width (for example, 50 mV in the present embodiment), the state detector 5 ends the sleep mode and starts determining the deterioration of the battery 1 or the like. At the same time, as shown in FIG. 6, power line communication is also started. In this embodiment, since the socket device 6 does not have a transmission / reception function, the state detector 5 transmits data regardless of the transmission request from the socket device 6. Since the current required for transmission is at the level of several tens of mA, the power of the battery 1 is consumed when transmitted for a long time. If the engine 7 is operating, there is no problem because the battery 1 is charged by power generation by the alternator 2. However, in other cases (that is, when the engine 7 is stopped), there is a problem that the power of the battery 1 is consumed by communicating for a long time.

  On the other hand, when the engine 7 is started, the engine 7 stops while the key operation position of the ignition switch 4 is located at the ACC position when the key operation position transitions to the OFF position, the ACC position, the ON position, the START position, and the ON position. When the key operation position of the ignition switch 4 transits to the ON position, the ACC position, and the OFF position, the socket device 6 is connected to the battery 1 to receive power supply and This is a period in which the communication state is less likely to receive noise from the electrical equipment and the alternator 2. Therefore, it is desirable to transmit during this period. However, when a long time elapses after the engine 7 is stopped, the key operation position of the ignition switch 4 is changed from the ACC position to the OFF position, the socket device 6 is disconnected from the battery 1 and is not supplied with power, and transmission in this state is not performed. Electricity is wasted.

  Therefore, in the present embodiment, when the voltage of the battery 1 has fluctuated, but the engine 7 has not started after that, as shown in FIG. 7, the state detector 5 indicates that the predetermined time T2 has elapsed since the start of transmission. Stop communication. Then, as shown in FIG. 6, the state detector 5 performs communication during the operation of the engine 7 and stops after performing communication for a predetermined time T <b> 1 after the engine 7 is stopped. This increases the possibility that the key operation position of the ignition switch 4 can communicate between the ACC positions, so that the communication success rate can be increased. Further, power consumption of the battery 1 due to waste of power can be avoided.

  FIG. 8 is a diagram showing an example of the configuration of communication packets for display information and history information in the present embodiment. In the present embodiment, a fixed-length format communication packet having a total number of 95 bits is used as an example. In FIG. 8, the upper part shows the configuration of the entire communication packet, the middle part shows the data part of display information, and the lower part shows the data part of history information. As shown in the upper part of FIG. 8, the fixed-length format having a total number of 95 bits includes a preamble of 7 bits, a header of 16 bits, a data part of 64 bits, and a cyclic redundancy code (CRC) of 8 bits.

  In the case of a communication packet for display information, six 8 bits of display information are set in the data portion. The history information is 4 to 32 k bits as a whole (one set), and an address on the memory of 0 to 4095 is attached to the address part, and 6 bytes of data are set from the address. Therefore, it is necessary to transmit 86 to 683 packets to transmit one set of history information. Therefore, power line communication is performed at a packet communication ratio with the transmission frequency of the history information packet 4095, 683, 136 with respect to the transmission frequency 1 of the display information packet, and the situation where the communication of the history information and the display information is completed is checked. It was.

  FIG. 9 is a diagram showing the reception rates of history information and display information in a table format. Since the display information has 6 data set in one packet, the ratio of the number of transmission data is 1: 1 when the packet ratio is 1: 4095, and is 6: 1 when 1: 683. When 1: 136, it becomes 30: 1. When the number of display information transmission packets is increased by changing the packet ratio from 1: 4095 to 1: 136, the display information reception rate is significantly improved. However, even if the number of display information transmission packets was increased, there was no significant difference in the history information reception rate. This is because the amount of history information is large, and the redundancy does not change greatly in the ratio of the number of transmission packets. With this configuration, the display information reception rate can be increased. As a result, since the display information is more important for daily use, high convenience can be obtained.

  In power line communication, the noise environment and the state of signal attenuation vary considerably due to the state of electrical components that are operating simultaneously, the state of harness routing, and the like. Thus, in the power line communication, a certain communication condition is not always ensured. For this reason, it is desirable to prioritize the data to be transmitted based on its importance and execute the transmission according to the priority.

  What is important in normal time is display information displayed on the display unit 54 of the socket device 6. Therefore, the power line communication unit 14 of the state detector 5 increases the redundancy of the display information transmission and transmits the display information. In the present embodiment, the display information is information for five LEDs of the LEDs 71 to 75. Therefore, if a 1-byte data area is provided, display information can be sufficiently transmitted by one transmission.

  On the other hand, the history information has a capacity of several kilobytes. It is also assumed that it is difficult to reliably receive all history information. Therefore, the history information is a packet different from the display information. Further, the power line communication unit 14 of the state detector 5 indicates the redundancy of transmission within a predetermined time so that the display on the display unit 54 of the socket device 6 can be displayed even if the history information cannot be received. : History information = 100: 1 is transmitted. Specifically, when the power line communication unit 14 transmits the same information about the history information once, the power line communication unit 14 repeatedly transmits the same information about the display information 100 times, thereby increasing the redundancy of the display information with respect to the redundancy of the history information. . The frequency with which the user takes out the history information is considerably lower than the frequency with which the display on the normal display unit 54 is confirmed. Therefore, this configuration enables the use according to the actual use.

  FIG. 10 is a flowchart showing an example of the operation of the socket device 6. In the initial state, the socket device 6 is not energized, that is, the key operation position of the ignition switch 4 is in the OFF position. Then, when the key operation position of the ignition switch 4 is any one of the ACC position, the ON position, and the START position, power is supplied to the socket device 6 and the flow operation shown in FIG. 10 is started.

  First, the arithmetic control unit 65 turns off the LED 76 for display completion of display information display (step S1). Next, the arithmetic control unit 65 determines whether or not the display information has been received by the power line communication unit 52 (step S2). When the display information cannot be received (NO in step S2), the arithmetic control unit 65 stands by. On the other hand, when the display information can be received (YES in step S2), the arithmetic control unit 65 updates the display content of the display unit 54 according to the content of the received display information (step S3). That is, the arithmetic control unit 65 controls the lighting or extinguishing of each of the deterioration state display LEDs 71, 72, 73, the insufficient charging display LED 74, and the overcharge display LED 75. Further, the arithmetic control unit 65 turns on the LED 76 for displaying the reception completion of the display information (step S4).

  According to this configuration, when the LED 76 for indicating completion of reception of display information is lit, the state detection is performed after the engine 7 is started by operating the key operation position of the ignition switch 4 from the OFF position in the current traveling. This means that the power line communication unit 52 of the socket device 6 has received the display information transmitted from the device 5. Therefore, the received display information data represents the result of determining the state of the battery 1 after the current engine 7 is started or after the engine 7 is started one time before. This is because there is a possibility that display information that has been determined after the engine 7 has been started one time before and stored in the history storage unit 26 has been transmitted. For this reason, the lighting state of the LEDs 71 to 75 reflects the most recent state of the battery 1.

  In the case of power line communication, communication may not be established depending on the environment. For this reason, it is difficult to confirm whether or not the status display of the battery 1 (that is, the lighting states of the LEDs 71 to 75) is appropriate. However, according to the configuration of the present embodiment, the user can confirm that the state of the latest battery 1 is displayed by confirming the lighting state of the LED 76 for display completion of display information. For this reason, in this embodiment, a user's convenience becomes high.

  As shown in FIG. 10, by repeating steps S2 to S4, the socket device 6 sequentially receives display information during one vehicle travel, and each time the status information of the battery 1 is displayed (LEDs 71 to 75 are lit). Status) is updated. Abnormalities in the battery 1 rarely progress rapidly, and usually takes several days. Therefore, if the display information can be received once by the socket device 6 in one vehicle travel, there is no problem with the update frequency of the state display of the battery 1.

  The LED 76 for indicating completion of reception of the display information is turned off when the key operation position of the ignition switch 4 is set to the OFF position and the power supply from the battery 1 to the socket device 6 is interrupted. Further, the LED 76 is turned off at the start of power supply from the battery 1 to the socket device 6 as shown in step S1 of FIG. The LED 76 is turned on when display information is received during energization of the socket device 6. Therefore, if the LED 76 is lit while the vehicle is traveling, the status display of the battery 1 can be regarded as the most recent data.

  As described above, the present embodiment includes the LED 76 for displaying the reception completion of the display information that is turned off when the key operation position of the ignition switch 4 is set to the OFF position and is turned on when the reception of the display information is completed. Thereby, the user can confirm that the status display of the battery 1 is appropriately updated.

  FIG. 11 is a flowchart showing another example of the operation of the socket device 6. Steps having the same contents as those in FIG. 10 are denoted by the same reference numerals, and description thereof is omitted as appropriate. Similar to FIG. 10, in the initial state, the socket device 6 is not energized, that is, the key operation position of the ignition switch 4 is in the OFF position. When the key operation position of the ignition switch 4 is any one of the ACC position, the ON position, and the START position, power is supplied to the socket device 6 and the flow operation shown in FIG. 11 is started.

  Subsequent to step S <b> 1, the arithmetic control unit 65 reads display information previously acquired and stored by power line communication from the display information storage unit 68 of the nonvolatile memory 66, and displays the display unit based on the read display information. 54 is controlled (step S11). Next, step S2 is executed, and then step S3 is executed. By step S3, the state display of the battery 1 (lighted state of the LEDs 71 to 75) is updated to the latest state.

  Subsequent to step S3, the arithmetic control unit 65 updates the data in the display information storage unit 68 (step S12), and then turns on the display information reception completion LED 76 (step S4). The operation shown in FIG. 11 allows the state of the battery 1 to be displayed with previously received data even when the power line communication is not established, and it is understood that the data has been updated to the latest if the power line communication is established. . According to the operation flow shown in FIG. 11, the user can obtain high convenience.

  As described above, in the present embodiment, in the arithmetic processing unit 53 of the socket device 6, the arithmetic control unit 65 stores display information obtained by power line communication in the display information storage unit 68 of the nonvolatile memory 66. . When the key operation position of the ignition switch 4 is operated from the OFF position to a position other than the OFF position (for example, the ACC position), the arithmetic control unit 65 turns off the display information reception completion LED 76, and The display unit 54 is controlled based on the latest data stored in the display information storage unit 68. After that, when power line communication is established and newer detection information is obtained, the arithmetic control unit 65 turns on the LED 76 for indicating completion of reception, and updates the status display of the battery 1 (the lighting status of the LEDs 71 to 75). At the same time, the storage content of the display information storage unit 68 is also updated. Thereby, when the key operation position of the ignition switch 4 is located at the ACC position, the ON position, or the START position, it is possible to prevent a problem that the status display of the battery 1 cannot be performed until communication is established. Can do.

  In the present embodiment, when the calculation control unit 65 further completes the reception of the history information transmitted from the state detector 5, the LED 77 for displaying the history information reception completion is turned on. In addition, the arithmetic control unit 65 stores history information obtained by power line communication in the history information storage unit 67 of the nonvolatile memory 66. Thereby, the reception status of history information can be confirmed separately from the display information. As a result, it is possible to check whether or not the latest information including display information and history information is read in the socket device 6 (that is, whether or not it is stored in the nonvolatile memory 66 of the socket device 6).

  FIG. 12 is a diagram schematically showing a state in which the socket device 6 and the information processing terminal 81 are connected. A USB cable 82 is connected to a slave-side USB connector terminal 43 provided in a spindle-shaped portion of the socket device 6 removed from the vehicle socket 3 (FIG. 1). Further, the USB cable 82 is connected to the information processing terminal 81. Insert into the USB connector terminal 83. The information processing terminal 81 may be a general personal computer as long as it can communicate with the socket device 6 via the USB cable 82.

  In the main body of the information processing terminal 81, data display software is separately prepared. On the other hand, when the arithmetic control unit 65 of the arithmetic processing unit 53 of the socket device 6 receives a request for data via the USB connector terminal 43, it reads the data from the nonvolatile memory 66 and reads it via the USB connector terminal 43. The transmitted data is transmitted to the information processing terminal 81. At this time, the socket device 6 receives power supply from the information processing terminal 81 via the USB cable 82. In the present embodiment, the USB connector terminal 43 corresponds to an example of a slave-side connector, and the information processing terminal 81 corresponds to an example of an information processing device.

  The software of the information processing terminal 81 displays the data transmitted from the socket device 6 on the display screen 84. The information displayed on the display screen 84 is history information such as the start characteristics of the battery 1, changes over time in the open circuit voltage (OCV), and when charging shortage or overcharging occurred in time series. Since the socket device 6 can be easily detached from the socket 3 of the vehicle, it can be easily carried near the information processing terminal 81. According to this embodiment, since the information of the state detector 5 can be easily taken out via the socket device 6, the convenience is enhanced.

  The socket device 6 includes a history information storage unit 67. Since the history information storage unit 67 is provided in the non-volatile memory 66, even if the socket device 6 is removed from the socket 3 of the vehicle, the stored information is retained. Then, when the USB connector terminal 43 provided in the socket device 6 and the information processing terminal 81 are connected by the USB cable 82, the socket device 6 receives a power supply via the USB cable 82 and records in the communication line of the USB cable 82. Send information. The information processing terminal 81 receives this history information and displays it on the display screen 84.

  Thus, according to the present embodiment, the information related to the battery 1 in more detail, for example, how much the starting voltage of the battery 1 has decreased over time, or the open circuit voltage of the battery 1 during stopping (stop of the engine 7) It can be confirmed how (OCV) has changed over time. Therefore, it is possible to read the history information of the state detector 5 without opening the hood of the vehicle and directly connecting the information processing terminal 81 to the state detector 5.

  FIG. 13 is a diagram schematically showing a state where the information processing terminal 85 is connected to the socket device 6 inserted in the socket 3 of the vehicle via the USB cable 82. The information processing terminal 85 is a portable information terminal having a USB connector terminal 86 such as a so-called smartphone. As shown in FIG. 13, the USB cable 82 is connected to the master-side USB connector terminal 44 provided on the display surface 54 a of the socket device 6.

  When the USB cable 82 is connected to the USB connector terminal 44, the arithmetic control unit 65 of the arithmetic processing unit 53 of the socket device 6 detects this connection and stores it in the history information storage unit 67 of the nonvolatile memory 66. The history information of the battery 1 is read, and the read history information of the battery 1 is transmitted to the information processing terminal 85 connected by the USB cable 82. In the present embodiment, the USB connector terminal 44 corresponds to an example of a master connector, the arithmetic control unit 65 corresponds to an example of a transmission control unit, and the information processing terminal 85 corresponds to an example of an information processing device.

  The information processing terminal 85 receives the history information of the battery 1 via the USB cable 82 and also receives power supply from the battery 1. Then, the information processing terminal 85 displays the history information of the battery 1, for example, the change with time of the deterioration state on the display screen 87. In the present embodiment, the information processing terminal 85 is placed near the driver's seat, for example, and the USB cable 82 is connected to the socket device 6 inserted in the vehicle socket 3.

  In this connection state, when the key operation position of the ignition switch 4 is located at the ACC position, the information processing terminal 85 can always receive power from the socket device 6 and receive the latest information about the battery 1. It becomes. For this reason, in this embodiment, high convenience can be ensured. Further, the information regarding the battery 1 read via the USB cable 82 can be transferred from the information processing terminal 85 through the Internet or moved to another information processing terminal. For this reason, in this embodiment, high convenience can be ensured.

  As described above, in the present embodiment, since the USB connector terminal 44 is exposed on the display surface 54a provided on the front surface of the socket device 6, the socket device 6 is inserted into the socket 3 of the vehicle, The information processing terminal 85 can be connected. When the information processing terminal 85 is connected to the USB connector terminal 44 via the USB cable 82 in a state where the socket device 6 is inserted into the socket 3 of the vehicle, detailed information of the battery 1 can be displayed. Therefore, in this embodiment, it is not necessary to take the socket device 6 out of the vehicle, and detailed information can be confirmed on the spot.

  Conventionally, as a battery status detection device, in addition to status display information, long-term history information of the battery is retained and read by a reader, so that the maintenance information and deterioration information of the battery with finer grain can be obtained. There was a device with a configuration to obtain. However, the battery state detection device is configured to read by optical communication or electrical communication by connecting or contacting a dedicated reader directly to a state detector connected to the battery. Therefore, in the engine room where the battery is placed, it is necessary to connect a reader to a state detector connected to the battery. However, this operation is very complicated and lacks convenience.

  On the other hand, in this embodiment, since the troublesome work of opening the hood of the vehicle and connecting the information processing terminal 85 to the state detector 5 in the engine room can be avoided, high convenience can be ensured. Further, according to this configuration, the information processing terminal 85 can be charged with a battery built in the information processing terminal 85 while operating with power supplied from the socket device 6 via the USB cable 82. For this reason, the convenience for the user is further enhanced.

  FIG. 14 is a block diagram illustrating a configuration of the socket device 6a according to a modification of the above embodiment. FIG. 15 is a timing chart showing user operations, vehicle states, and power line communication states in the modification shown in FIG. In FIG. 14, the same components as those in FIG. 3 are denoted by the same reference numerals. Below, the deformation | transformation form of a socket apparatus is demonstrated centering on difference with the said embodiment.

  The socket device 6a shown in FIG. 14 includes an audio output unit 91 in addition to the components of the socket device 6 shown in FIG. The voice output unit 91 has a known configuration including, for example, a voice synthesis IC and a speaker. The arithmetic control unit 65 controls the audio output unit 91 to notify the user of a message regarding the operation of the key operation position of the ignition switch 4 as will be described later. In the form shown in FIG. 14, the audio output unit 91 corresponds to an example of a transmission unit.

  In FIG. 15, when the user unlocks the door at time t21 when the engine 7 is stopped, the fluctuation range of the voltage fluctuation of the battery 1 becomes equal to or greater than a predetermined value V1 (for example, V1 = 50 mV). Similarly to the above embodiment, this voltage variation is detected and power line communication is started. Here, in FIG. 15, the user sets the key operation position of the ignition switch 4 to the ACC position, and the display information reception completion display LED 76 is turned on (or until a predetermined time T3 elapses). stand by. In this variation, for example, T3 = 30 seconds. Thereafter, the user moves the key operation position of the ignition switch 4 to the START position at the time t22 when the LED 76 is turned on (or when the predetermined time T3 has elapsed), starts the engine 7, and moves to the running of the vehicle.

  In the operation shown in FIG. 15 and the normal operation shown in FIG. 6, an experiment was conducted on 30 units of the same vehicle to determine whether or not the display information reception completion LED 76 was lit after the vehicle traveled for 15 minutes. Went. As a result, the number of vehicles that were lit was 27 in the operation shown in FIG. 6 compared to 30 in the operation shown in FIG. When the key operation position of the ignition switch 4 is in the ACC position, the engine 7 is stopped and the alternator 2 is not generating power. For this reason, the noise level superimposed on the power supply line is lower in the ACC position than in the ON position. Therefore, the operation shown in FIG. 15 can improve the communication success rate compared to the operation shown in FIG.

  Therefore, in the form shown in FIG. 14, when the calculation control unit 65 detects the unlocking of the door, the arithmetic control unit 65 controls the voice output unit 91 to set the key operation position of the ignition switch 4 to the ACC position before the engine 7 is started. A message that prompts the user to maintain for a predetermined time T3 is notified to the user. In addition, the arithmetic control unit 65 further uses a message prompting to give up communication and start the engine 7 when the LED 76 does not light even when the key operation position is in the ACC position and the predetermined time T3 has elapsed. A person may be notified.

  Further, the arithmetic control unit 65 sets the key operation position of the ignition switch 4 to the ACC position for a predetermined time when the LED 76 is not lit even after a predetermined time T4 (for example, T4 = 30 seconds) has elapsed since the engine 7 is started. The user may be informed of a message prompting him to maintain for T3.

  Furthermore, the calculation control unit 65 is configured to switch the key of the ignition switch 4 when the LED 76 for displaying display information reception completion or the LED 77 for displaying history information reception completion is not lit for a long time (for example, one week or one month). A message prompting the user to confirm that the LED 76 and the LED 77 are turned on may be notified to the user by maintaining the operating position of the ACC position for a predetermined time T3 before the engine 7 is started.

  In power line communication, a communication signal is superimposed on the power line of the battery 1, so that the noise environment is better when the electrical component is not operating. On the other hand, when the key operation position of the ignition switch 4 is in the ACC position, the socket device 6 is connected to the power line of the battery 1, but only the accessory electrical components are not operating. Therefore, the communication success rate can be further improved by taking a long time in the state of the ACC position before starting the engine 7 so that communication can be performed in this state. Therefore, by informing the user of the message as described above, the user can be dealt with when the communication state is not good.

  FIG. 16 is a block diagram showing a configuration of a socket device 6b in still another modification of the above embodiment. The socket device 6b shown in FIG. 16 includes a liquid crystal display (LCD) unit 92 instead of the audio output unit 91 of the socket device 6a shown in FIG. The arithmetic control unit 65 controls the LCD unit 92 to display a message regarding the operation of the key operation position of the ignition switch 4 described with reference to FIG. In the form shown in FIG. 16 as well, as in the form shown in FIG. 14, a message can be notified to the user. In the form shown in FIG. 16, the LCD unit 92 corresponds to an example of a transmission unit.

  In addition, you may describe the above messages in the instruction manual of a battery status display apparatus provided with the state detector 5 and the socket apparatus 6, or the instruction manual of a vehicle. Further, instead of or in addition to this, a sticker or the like on which the above message is written may be attached to the surface of the socket device 6, and the above message is printed on the surface of the socket device 6. May be.

  As described above, the message as described above is described in the battery state display device or the instruction manual of the vehicle, printed on the surface of the socket device 6, and the seal with the message as described above is printed on the socket device 6. The user can also be alerted by sticking to the surface. That is, the user can be urged to maintain the key operation position of the ignition switch 4 at the ACC position (that is, the communication environment with a low noise level is good). Thus, the user can be guided so that the power line communication from the state detector 5 to the socket device 6 is performed satisfactorily.

  As described above, according to the embodiment or the modification, the detection information of the state detector 5 provided near the battery 1 is inserted into the cigarette lighter socket 3 by using power line communication. When displaying on the display unit 54 of the socket device 6, it is possible to confirm whether or not the power line communication is smoothly performed and received.

  Further, according to the above-described embodiment or the above-described modification, when not received, it is possible to prompt the user to take an appropriate alternative process by transmitting a message to the user. Moreover, according to the said embodiment or the said modification, when it does not receive even if fixed time passes, the coping method of giving up communication to a user can be specified.

  Moreover, according to the said embodiment or the said modification, when reading detailed log | history information etc. from the state detector 5 provided in the vicinity of the battery 1, the complicated work of opening a bonnet and connecting a reader | leader is carried out. Can be avoided.

  Moreover, according to the said embodiment or the said modification, although the state detector 5 of the battery 1 handles two types of characteristic information, display information and history information, appropriate information based on the character of those information The transmission method can be used. That is, when detailed history information is transmitted, the amount of information to be communicated increases by two or more digits compared to the display information. Therefore, since the power line communication has poor communication quality, communication is performed with a difference in the redundancy of transmission of the display information and history information. As a result, it is possible to avoid a case in which display information cannot be received and communication ends. As a result, it is possible to accurately display the state of the battery 1.

  Moreover, according to the said embodiment or the said modification, the detection information of the state detector 5 is displayed on the display part 54 of the socket apparatus 6 with which the socket 3 for cigarette lighters was mounted, without wiring work of a vehicle main body. It becomes possible. Moreover, it can confirm that the information regarding the battery 1 preserve | saved at the non-volatile memory 66 was updated whenever the engine 7 was started by lighting of LED76,77.

  Furthermore, according to the embodiment or the modified embodiment, the engine 7 is stopped in the best communication environment and the power is supplied to the socket device 6 (that is, the key operation position of the ignition switch 4 is the ACC position). Communication). For this reason, the success rate of communication can be improved.

  Moreover, according to the said embodiment or the said modification, it becomes possible to read the detailed log | history information etc. of the battery 1 preserve | saved at the non-volatile memory 66 of the socket apparatus 6 with the external information processing terminals 81 and 85. . For this reason, history information can be visually recognized satisfactorily. Furthermore, since it is not necessary to connect the socket device 6 and the information processing terminals 81 and 85 in the engine room, it is easy to read history information and the like.

  Further, according to the embodiment or the modification, the transmission function from the state detector 5 is stopped while the engine 7 is stopped. As a result, the power consumption of the battery 1 is reduced. As described above, according to the embodiment or the modification, a battery state display device having high convenience can be provided.

  The specific embodiments and examples described above mainly include inventions having the following configurations.

  A battery status display device according to an aspect of the present invention is a battery status display device that is provided in a vehicle having an engine as a main power source and displays a status of a battery for starting the engine, and is in the vicinity of the battery. A state detector that receives power from the battery, and a socket device that is mounted on a cigarette lighter socket of the vehicle and receives power from the battery via the socket, the state detector includes: A battery detection unit that detects information related to a battery state, and transmits information related to the battery state detected by the battery detection unit to the socket device as detection information via a power supply line connected to the battery. The socket device is transmitted from the state detector via the power line. A receiving unit that receives the detection information, a state display unit that displays the state of the battery based on the detection information received by the receiving unit, and when the receiving unit completes reception of the detection information, A notification unit that notifies the user of the completion of reception of the detection information.

  According to this configuration, the battery state display device is used in a vehicle having an engine as a main power source, and displays the state of a battery provided for starting the engine. The battery status display device includes a status detector and a socket device. The state detector is provided in the vicinity of the battery. The state detector receives power from the battery. The socket device is mounted on a socket for a cigarette lighter of a vehicle and receives power from a battery via the socket.

  The state detector includes a battery detection unit and a transmission unit. Information regarding the state of the battery is detected by the battery detection unit. Information regarding the state of the battery detected by the battery detection unit is transmitted to the socket device by the transmission unit as detection information via a power line connected to the battery.

  The socket device includes a receiving unit, a status display unit, and a notification unit. The detection information transmitted from the state detector via the power line is received by the receiving unit. Based on the detection information received by the receiving unit, the state of the battery is displayed on the status display unit. When the reception unit completes reception of the detection information, the notification unit notifies the user of the completion of reception of the detection information.

  Therefore, it is possible to display the detection information of the state detector on the state display unit of the socket device attached to the socket for the cigarette lighter without wiring the vehicle. Moreover, the user can confirm by the notification unit that the state of the battery displayed on the state display unit is the latest state.

  In the battery status display device, the socket device further includes a nonvolatile memory, and a storage control unit that stores the detection information received by the reception unit in the nonvolatile memory, and the storage control unit includes: The detection information stored in the nonvolatile memory may be updated every time the receiving unit receives the detection information.

  According to this configuration, each time the receiving unit receives the detection information, the storage control unit updates the detection information stored in the nonvolatile memory. Therefore, the latest detection information can be stored in the nonvolatile memory.

  In the battery state display device, the state display unit may display the detection information stored in the nonvolatile memory until the reception unit newly receives the detection information.

  According to this configuration, the detection information stored in the nonvolatile memory is displayed on the state display unit until the reception unit newly receives the detection information. Therefore, it is possible to avoid a situation in which the detection information is not displayed on the status display unit after the power supply to the socket device is started until the reception unit receives the detection information.

  In the battery status display device, the transmission unit transmits the detection information when the key operation for moving the key operation position of the ignition switch of the vehicle from the OFF position to a position other than the OFF position is performed. In the position, power may not be supplied from the battery to the socket, and power may be supplied from the battery to the socket in a position other than the OFF position.

  According to this configuration, when a key operation for moving the key operation position of the ignition switch from the OFF position to a position other than the OFF position is performed, the transmission unit transmits the detection information. Therefore, whenever the user performs a key operation to move the key operation position of the ignition switch from the OFF position to a position other than the OFF position, that is, every time the vehicle starts to travel, the status display section displays the latest information. The detection information is displayed. Battery abnormalities rarely progress rapidly and usually take several days. Therefore, as long as the information regarding the state of the battery can be received once and displayed on the state display unit every time the vehicle travels, there is no problem as the display update frequency.

  In the battery status display device, the battery detection unit detects the voltage of the battery every predetermined cycle, and the transmission unit detects the detected value of the battery voltage by the battery detection unit before the predetermined cycle. The transmission of the detection information may be started when the fluctuation range from is equal to or greater than a predetermined width.

  According to this configuration, the battery voltage is detected by the battery detection unit every predetermined period. When the fluctuation range from the detection value before the predetermined period of the detection value of the battery voltage by the battery detection unit becomes equal to or greater than the predetermined range, the transmission unit starts transmitting detection information. Therefore, the transmission unit can start transmitting the detection information at a suitable timing.

  That is, when the key operation position of the ignition switch is set to the OFF position, the socket device is not supplied with power from the battery via the socket. For this reason, even if the detection information is transmitted from the transmission unit, the reception unit cannot receive the transmitted detection information. Here, the battery voltage fluctuates when the user performs any operation on the vehicle, for example, the door unlocking operation, etc., but it is considered that the probability that the user starts the engine after the operation is high. .

  Therefore, in this configuration, when the fluctuation width of the battery voltage in a predetermined cycle exceeds the predetermined width, the transmission unit predicts that power is supplied from the socket, and the transmission unit starts transmitting detection information. This eliminates unnecessary transmission such as continuous transmission while the engine is stopped, prevents battery consumption, and increases the probability of successful reception of detection information.

  In the battery status display device, the transmission unit transmits the detection information for a predetermined time or a predetermined number of times after starting transmission of the detection information, and the engine is started at the end of the predetermined time or the predetermined number of transmissions. If not, transmission of the detection information may be stopped.

  According to this configuration, after the transmission of the detection information is started, the transmission unit transmits the detection information for a predetermined time or a predetermined number of times. Then, the transmission unit stops transmitting the detection information if the engine is not started at the end of transmission for a predetermined time or a predetermined number of times. As a result, the degree of battery consumption can be reduced.

  In other words, if the engine is started after transmission of detection information from the transmitter, the battery is charged by power generation by the alternator, but there is no problem, but if the engine is not started, transmission continues for a long time. This causes a problem that the battery is consumed. Therefore, if the engine is not started at the end of transmission for a predetermined time or a predetermined number of times, battery consumption can be avoided by stopping transmission of detection information.

  In the battery status display device, when the engine is stopped after the transmission of the detection information is started, the transmission unit continues to transmit the detection information until a predetermined reference time has elapsed since the stop of the engine, The transmission of the detection information may be stopped when the reference time elapses after the engine is stopped.

  According to this configuration, when the engine is stopped after the transmission of information from the transmission unit is started, the transmission unit continues to transmit the detection information until a predetermined reference time elapses after the engine is stopped. Stop transmission of detection information when the reference time elapses.

  Here, when the engine stops, the key operation position of the ignition switch moves from the ON position to the OFF position via the ACC position. The period in which the key operation position is at the ACC position is a period in which the socket device can receive power from the battery and is in a good communication state that is less susceptible to noise from the alternator because the engine is stopped. Therefore, by continuing the transmission of the detection information until a predetermined reference time elapses after the engine is stopped, the possibility that the key operation position is in the ACC position is increased and the probability of successful reception is increased. can do.

  When the key operation position moves from the ACC position and reaches the OFF position, the socket device cannot receive power from the battery, and transmission in this state is a waste of power. Therefore, by stopping the transmission of detection information when the reference time elapses after the engine is stopped, the degree of battery consumption due to wasted power can be reduced.

  In the battery status display device, the detection information includes display information regarding display contents of the status display unit and history information regarding the history of the battery, and the transmission unit includes the display information and the history information. The state display unit displays the state of the battery based on the display information received by the reception unit, and the notification unit displays the display when the reception unit completes reception of the display information. A first notification unit that notifies the user of the completion of reception of information, and a second notification unit that notifies the user of completion of reception of the history information when the reception unit completes reception of the history information. Good.

  According to this configuration, the detection information includes display information related to the display content of the status display unit and history information related to the battery history. Display information and history information are transmitted separately by the transmission unit. Based on the display information received by the receiving unit, the state of the battery is displayed on the status display unit. When the reception unit completes reception of the display information, the first notification unit notifies the user of the completion of reception of the display information. When the reception unit completes the reception of the history information, the second notification unit notifies the user that the history information has been received. Therefore, when the first notification unit notifies the user that the display information has been received, the user can confirm that the state of the battery displayed on the state display unit is the latest information. Further, the user can confirm the completion of reception of the display information and the history information.

  In the battery status display device, the capacity of the display information transmitted by the transmission unit is 10 bytes or less, and the capacity of the history information transmitted by the transmission unit is 100 bytes or more. When the display information and the history information are transmitted, the display information transmission redundancy may be set to 10 times or more of the history information transmission redundancy.

  According to this configuration, the capacity of display information transmitted by the transmission unit is 10 bytes or less, and the capacity of history information transmitted by the transmission unit is 100 bytes or more. When the display information and the history information are transmitted, the display information is transmitted with a redundancy of 10 times or more of the transmission redundancy of the history information. Therefore, the receiving unit can receive the display information more reliably than the history information. For this reason, the status display unit can more reliably display the status of the battery based on the latest display information. In addition, the frequency with which the user confirms the history information is considered to be considerably lower than the frequency with which the user confirms the state of the battery displayed on the status display unit. Therefore, according to the above configuration, transmission suitable for the actual use can be performed.

  In the battery status display device, the socket device includes a nonvolatile memory for storing the detection information received by the receiving unit, and a slave-side connector for connecting to an external information processing device via a communication line. The socket device is stored in the nonvolatile memory when the socket device is connected to the information processing device via the communication line by the slave connector. The detection information may be read out.

  According to this configuration, the detection information received by the receiving unit is stored in the nonvolatile memory of the socket device. The socket device is connected to an external information processing apparatus via a communication line by a slave-side connector. The socket device is configured so that when the socket device is connected to the information processing device via the communication line by the slave-side connector, the information processing device can read the detection information stored in the nonvolatile memory. Yes. Accordingly, the information processing apparatus can operate as the master side and operate the socket device as the slave side to suitably read the detection information stored in the nonvolatile memory.

  In the battery status display device, the socket device includes a non-volatile memory for storing the detection information received by the receiving unit, and a master-side connector for connecting to an external information processing device via a communication line. A transmission control unit for transmitting the detection information stored in the nonvolatile memory to the information processing device when the socket device is connected to the information processing device via the communication line by the master side connector; , May be further included.

  According to this configuration, the detection information received by the receiving unit is stored in the nonvolatile memory of the socket device. The socket device is connected to the information processing apparatus via a communication line by a master side connector. When the socket device is connected to the information processing apparatus via the communication line by the master-side connector, the transmission control unit transmits the detection information stored in the nonvolatile memory to the information processing apparatus. Therefore, the socket device can operate as the master side, operate the information processing device as the slave side, and preferably transmit the detection information stored in the nonvolatile memory to the information processing device.

  In the battery status display device, the master side connector may be provided at a position where the socket device can be connected to the information processing device via the communication line in a state where the socket device is mounted in the socket. Good.

  According to this configuration, the master side connector is provided at a position where it can be connected to the information processing apparatus via the communication line in a state where the socket device is mounted in the socket. Therefore, by connecting the information processing apparatus to the master side connector, there is no need to take the socket device out of the vehicle, and the detection information stored in the nonvolatile memory can be easily transmitted to the information processing apparatus in the vehicle. Can do. Further, it is possible to avoid the troublesome work of opening the hood of the vehicle and connecting the information processing device to a state detector provided in the vicinity of the battery. For this reason, high convenience can be secured.

  In the battery status display device, the socket device further includes a transmission unit that transmits a message recommending that the key operation position of the ignition switch is maintained at the ACC position for a predetermined time to the user. Power may be supplied from the battery to the socket, and the engine may be stopped.

  According to this configuration, a message recommending that the key operation position of the ignition switch be maintained at the ACC position for a predetermined time is transmitted to the user by the transmission unit. In the ACC position, power is supplied from the battery to the socket, and the engine is stopped. The transmission unit transmits the detection information to the socket device via a power line connected to the battery. Noise superimposed on the power line is smaller in the state of the ACC position where power is supplied from the battery to the socket and the engine is stopped than in the state where the engine is operating. For this reason, when the user follows the message, the probability of successful reception of the detection information can be increased.

  In the battery status display device, a message recommending that the key operation position of the ignition switch be maintained at the ACC position for a predetermined time is displayed on the surface of the socket device so as to be visible by a user. At the ACC position, Power may be supplied from the battery to the socket, and the engine may be stopped.

  According to this configuration, a message recommending that the key operation position of the ignition switch be maintained at the ACC position for a predetermined time is displayed on the surface of the socket device so as to be visible to the user. In the ACC position, power is supplied from the battery to the socket, and the engine is stopped. The transmission unit transmits the detection information to the socket device via a power line connected to the battery. Noise superimposed on the power line is smaller in the state of the ACC position where power is supplied from the battery to the socket and the engine is stopped than in the state where the engine is operating. For this reason, when the user follows the message, the probability of successful reception of the detection information can be increased.

  The vehicle according to an aspect of the present invention includes an ignition configured to switch the battery status display device, the engine, the battery, the socket, and a key operation position between an OFF position, an ACC position, and an ON position. When the key operation position is in the OFF position, power is not supplied from the battery to the socket, and when the key operation position is in the ACC position, power is supplied from the battery to the socket; and When the engine is stopped and the key operation position is in the ON position, power is supplied from the battery to the socket, and the engine is operating.

  According to this configuration, the battery state display device includes the state detector and the socket device. The state detector is provided in the vicinity of the battery. The state detector receives power from the battery. The socket device is mounted on a socket for a cigarette lighter of a vehicle and receives power from a battery via the socket.

  The state detector includes a battery detection unit and a transmission unit. Information regarding the state of the battery is detected by the battery detection unit. Information on the state of the battery detected by the battery detection unit is transmitted to the socket device by the transmission unit via the power line connected to the battery.

  The socket device includes a receiving unit, a status display unit, and a notification unit. The detection information transmitted from the state detector via the power line is received by the receiving unit. Based on the detection information received by the receiving unit, the state of the battery is displayed on the status display unit. When the reception unit completes reception of the detection information, the notification unit notifies the user of the completion of reception of the detection information.

  Therefore, it is possible to display the detection information of the state detector on the state display unit of the socket device attached to the socket for the cigarette lighter without wiring the vehicle. Moreover, the user can confirm by the notification unit that the state of the battery displayed on the state display unit is the latest state.

  Further, when the key operation position of the ignition switch is in the ACC position and the ON position, power is supplied from the battery to the socket. For this reason, when the transmission unit of the state detector transmits detection information via the power line with the key operation position set to the ACC position and the ON position, the reception unit of the socket device may receive the detection information. it can.

  Here, the engine is operating when the key operation position of the ignition switch is in the ON position, whereas the engine is stopped when the key operation position is in the ACC position. Therefore, the noise superimposed on the power supply line is smaller in the state of the ACC position than in the state of the key operation position being the ON position. For this reason, by setting the key operation position to the ACC position state, it is possible to improve the probability that the reception unit of the socket device can receive the detection information as compared to the ON position state.

  The battery status display device according to the present invention is useful as a device for suitably displaying the status of a battery provided in a vehicle having an engine as a main power source for starting the engine.

Claims (15)

A battery status display device that is provided in a vehicle having an engine as a main power source and displays a status of a battery for starting the engine,
A state detector provided near the battery and receiving power from the battery;
A socket device that is mounted on a cigarette lighter socket of the vehicle and receives power from the battery via the socket;
With
The state detector is
A battery detector for detecting information relating to the state of the battery;
A transmission unit that transmits information about the state of the battery detected by the battery detection unit to the socket device as detection information via a power line connected to the battery;
Including
The socket device is:
A receiving unit that receives the detection information transmitted from the state detector via the power line;
Based on the detection information received by the receiving unit, a state display unit that displays the state of the battery;
When the reception unit completes reception of the detection information, a notification unit that notifies the user of completion of reception of the detection information;
A battery status display device comprising: The socket device is:
Non-volatile memory;
A storage controller that stores the detection information received by the receiver in the nonvolatile memory;
Further including
2. The battery status display device according to claim 1, wherein the storage control unit updates the detection information stored in the nonvolatile memory every time the reception unit receives the detection information.   3. The battery status display according to claim 2, wherein the status display unit displays the detection information stored in the nonvolatile memory until the reception unit newly receives the detection information. apparatus. When the key operation for moving the key operation position of the ignition switch of the vehicle from the OFF position to a position other than the OFF position is performed, the transmission unit transmits the detection information,
In the OFF position, power is not supplied from the battery to the socket.
4. The battery status display device according to claim 1, wherein power is supplied from the battery to the socket at a position other than the OFF position. 5. The battery detection unit detects the voltage of the battery every predetermined period,
The said transmission part starts transmission of the said detection information, when the fluctuation range from the detection value before the said predetermined period of the detection value of the said battery voltage by the said battery detection part becomes more than predetermined width. Item 5. The battery status display device according to any one of Items 1 to 4.   The transmission unit transmits the detection information for a predetermined time or a predetermined number of times after the transmission of the detection information, and if the engine is not started at the end of the predetermined time or the predetermined number of transmissions, 6. The battery status display device according to claim 5, wherein transmission is stopped.   When the engine is stopped after transmission of the detection information is started, the transmission unit continues to transmit the detection information until a predetermined reference time elapses after the engine is stopped. The battery status display device according to claim 5 or 6, wherein transmission of the detection information is stopped when elapses. The detection information includes display information related to display contents of the state display unit, and history information related to the history of the battery,
The transmission unit transmits the display information and the history information separately,
The state display unit displays the state of the battery based on the display information received by the receiving unit,
The notification unit includes a first notification unit that notifies a user of completion of reception of the display information when the reception unit completes reception of the display information, and the history information when the reception unit completes reception of the history information. The battery status display device according to claim 1, further comprising: a second notification unit that notifies the user of completion of reception. The capacity of the display information transmitted by the transmission unit is 10 bytes or less, and the capacity of the history information transmitted by the transmission unit is 100 bytes or more,
When transmitting the display information and the history information, the transmission unit transmits the display information with a redundancy of 10 times or more of the transmission redundancy of the history information. The battery status display device according to claim 8. The socket device is:
A non-volatile memory for storing the detection information received by the receiving unit;
A slave-side connector for connecting to an external information processing apparatus via a communication line;
Further including
When the socket device is connected to the information processing device via the communication line by the slave connector, the socket device reads the detection information stored in the nonvolatile memory. The battery status display device according to claim 1, wherein the battery status display device is configured so that The socket device is:
A non-volatile memory for storing the detection information received by the receiving unit;
A master connector for connecting to an external information processing apparatus via a communication line;
A transmission control unit for transmitting the detection information stored in the nonvolatile memory to the information processing device when the socket device is connected to the information processing device via the communication line by the master side connector;
The battery status display device according to claim 1, further comprising:   The master-side connector is provided at a position where the socket device can be connected to the information processing apparatus via the communication line in a state where the socket device is mounted in the socket. Battery status display device. The socket device further includes a transmission unit that transmits a message recommending that the key operation position of the ignition switch is maintained at the ACC position for a predetermined time to the user,
The battery state display device according to any one of claims 1 to 12, wherein at the ACC position, power is supplied from the battery to the socket, and the engine is stopped. On the surface of the socket device, a message recommending that the key operation position of the ignition switch be maintained at the ACC position for a predetermined time is displayed so as to be visible by the user.
The battery state display device according to any one of claims 1 to 12, wherein at the ACC position, power is supplied from the battery to the socket, and the engine is stopped. The battery status display device according to any one of claims 1 to 14,
The engine;
The battery;
The socket;
An ignition switch configured to switch the key operation position between an OFF position, an ACC position, and an ON position;
With
When the key operation position is in the OFF position, power is not supplied from the battery to the socket.
When the key operation position is in the ACC position, power is supplied from the battery to the socket, and the engine is stopped.
The vehicle wherein power is supplied from the battery to the socket and the engine is operating when the key operation position is in the ON position.

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