Awakening and dormancy method for high-voltage charging and power distribution system assembly

Abstract

The invention discloses an awakening and dormancy method for a high-voltage charging and distribution system assembly, and belongs to the technical field of vehicle charging, corresponding dormancy and awakening strategies are set through the high-voltage charging and distribution system assembly, the awakening and dormancy method can be expanded to be applied to common fault working conditions, normal dormancy of a CDU can be guaranteed to be achieved under various working conditions according to the dormancy strategies, and the service life of the CDU is prolonged. It is guaranteed that the whole vehicle normally falls asleep under the condition that the conditions are met, and the whole vehicle is protected against over-release; according to the awakening strategy, normal awakening can be achieved in various working states, it can be guaranteed that the CDU is awakened to work in time in the whole vehicle working process according to the awakening strategy, and therefore it is guaranteed that all controllers can operate stably, the dormancy phenomenon does not occur in the operation process, and vehicle using safety is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle charging, and in particular to a method for waking up and sleeping a high-voltage charging and distribution system assembly. Background Art

[0002] The high-voltage charging and distribution system assembly (hereinafter referred to as CDU) is an essential component of the AC charging process of new energy vehicles. The control strategies of this component's sleep, wake-up, network management message sending, network management message and application message suspension affect whether these components and the entire vehicle can wake up, sleep, and work normally under various working conditions. If the strategy is not formulated reasonably, various faults may occur, such as failure to wake up, failure to sleep, too long sleep time, and failure to execute charging functions. Summary of the invention

[0003] In view of the above problems, the present invention provides a method for waking up and sleeping a high-voltage charging and distribution system assembly.

[0004] The technical solution of the present invention is as follows: a method for hibernation of a high-voltage charging and distribution system assembly, specifically:

[0005] The high-voltage charging and distribution system assembly enters sleep mode if it does not receive any network management message within 1100ms and any of the following conditions are met:

[0006] Condition 1:

[0007] (CPst=CP Connected&&OBCInCurr=0, for 90s) and PowerMode2=Off; or

[0008] (CCst=CC Disconnected, lasting 600ms) and PowerMode2=Off; or

[0009] (CPst=CP Disconnected, lasting 600ms) and PowerMode2=Off; or

[0010] (CPst=CP Connected changes to CPst=CP Disconnected) and? PowerMode2=Off;

[0011] Condition 2: ChargePermission_VCU = Finish Charging and CDUstate = Idle (OBC or DC / AC Idle);

[0012] Condition 3: (CDUstate = Charge Connected confirmed, lasting 1900ms) or (Charge Input confirmed, lasting 1900ms);

[0013] Condition 4: OBCOutCur<1A, lasting 90s.

[0014] A method for waking up a high-voltage charging and distribution system assembly, specifically:

[0015] It will be awakened when any of the following conditions are met:

[0016] Condition 1: CCst=CC Charging Connected;

[0017] Condition 2: CCst=CC Discharging Connected;

[0018] Condition 3: CPst = CP Connected;

[0019] Condition 4: Powermode2 = IgnitionOn;

[0020] Condition 5: Any controller sends a network management message.

[0021] The beneficial effects of the present invention are:

[0022] The sleep strategy of the present invention can be extended to apply to common fault conditions. According to this sleep strategy, it can be ensured that the CDU can be normally dormant under various conditions, and the whole vehicle can be normally dormant when the conditions are met, thereby protecting the whole vehicle from over-discharge; the wake-up strategy of the present invention can be normally awakened under various working conditions. According to this wake-up strategy, it can be ensured that the CDU is awakened in time during the operation of the whole vehicle, thereby ensuring that each controller can operate stably, and no dormancy phenomenon will occur during the operation process, thereby ensuring the safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the sleep logic diagram of the present invention.

[0024] Figure 2 This is the wake-up logic diagram of the present invention. DETAILED DESCRIPTION

[0025] It should be noted that in the description of the present invention, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect" and the like should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral connection; the connection can be a mechanical connection or an electrical connection; the connection can be a direct connection or an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Sleep strategy

[0028] If any of the following conditions is met and no network management message is received within 1100ms, the device goes into sleep mode:

[0029] ((CPst=CP Connected&&OBCInCurr=0,last 90s)||(CCst=CC Disconnected,last 600ms)||(CPst=CP Disconnected,last 600ms)||(CPst=CP Connected changes to CPst=CP Disconnected))&&PowerMode2=Off;

[0030] ChargePermission_VCU=Finish Chagring&&CDUstate=Idle(OBC or DC / ACIdle);

[0031] (CDUstate=Charge Connected confirmed, lasts 1900ms)||(Charge Input confirmed, lasts 1900ms);

[0032] OBCOutCur<1A, lasts for 90s.

[0033] Wake-up strategy

[0034] You can be awakened by meeting any of the following conditions:

[0035] CCst=CC Charging Connected;

[0036] CCst=CC Discharging Connected;

[0037] CPst=CP Connected;

[0038] Powermode2 = IgnitionOn;

[0039] Any controller sends a network management message.

[0040] The premise for the normal sleep of CDU is that it does not receive any network management message from other controllers within 1100ms, which means that other controllers are in sleep state at this time. Based on the above signal description and working logic, the following settings are made: Figure 1 The sleep logic shown can ensure smooth sleep under the following conditions:

[0041] When CPst=CP Connected and OBCInCurr=0 for 90s, it means that the card has been swiped to enter charging, but the charging pile fails to output current for 90s, which means that there may be a power outage at the charging pile, resulting in failure to charge. At this time, PowerMode2 of the vehicle is Off, indicating that the vehicle key is in the Off position. When charging is unable to proceed, the vehicle should go into sleep mode to save power consumption and avoid over-discharge of the battery.

[0042] When CCst = CC Disconnected and lasts for 600ms, it means that the vehicle is not connected to the charging gun and the CDU is not working. When the vehicle is in PowerMode2 = Off, the vehicle is in a power-off state. At this time, the CDU should go into sleep mode. When the vehicle has no other actions, other controllers of the vehicle should go into sleep mode one after another, and finally the whole vehicle goes into sleep mode.

[0043] When CPst=CP Disconnected and lasts for 600ms, if CCst=CC Disconnected, the status is consistent with the above 2 and should be in sleep mode. If CCst=CC Connected, it means that the charging gun is connected normally but the card is not swiped, that is, the vehicle has not entered the charging process and the CDU is still not working. When the vehicle is in PowerMode2=Off, the vehicle is in a power-off state and the CDU should be in sleep mode. When the vehicle has no other actions, other controllers of the vehicle should be in sleep mode one after another and the whole vehicle will eventually be in sleep mode.

[0044] When CPst=CP Connected changes to CPst=CP Disconnected, it means that charging is completed and the user has no charging demand. The vehicle exits the charging process. When PowerMode2=Off, the vehicle is in a power-off state. At this time, the CDU should sleep. When the vehicle has no other actions, other controllers of the vehicle should sleep one after another, and finally the whole vehicle sleeps.

[0045] When ChargePermission_VCU=Finish Charging and CDUstate=Idle(OBC or DC / ACIdle), it means that charging is completed, VCU sends a charging completion command, and CDU state is set to idle state. CDU stops working and should sleep. If PowerMode2=ACC or PowerMode2=IgnitionOn, it means that the vehicle has not entered the sleep preparation state. CDU will be awakened by other controllers and continue to send status messages. When PowerMode2=Off, the vehicle enters the power-off state, and CDU will then enter the sleep state. When there is no other action on the vehicle, other controllers of the vehicle should sleep one after another, and finally the vehicle will sleep.

[0046] When CDUstate=Charge Connected confirmed or CDUstate=Charge Inputconfirmed and lasts for 1900ms, it means that the CDU fails to switch to the charging state normally, that is, the vehicle does not have the charging conditions and the CDU is not working. At this time, the CDU should go into sleep mode. When the vehicle has no other actions, the vehicle controllers should go into sleep mode one after another, and finally the vehicle goes into sleep mode.

[0047] When OBCOutCurr is less than 1A and lasts for 90s, it means that the CDU is in a low-power output state for a long time. At this time, an unknown problem occurs in the vehicle or CDU and it cannot be charged normally. To protect user safety and the vehicle and CDU from damage, charging should be stopped. This limit can be flexibly adjusted according to different projects and vehicle models. This limit is only set for the project on which this patent is based.

[0048] During the normal operation of the vehicle, all controllers of the vehicle should send application messages and network management messages to the CAN bus normally, so that other related controllers can receive signals normally to support their normal operation. Therefore, the CDU should be awakened normally in many cases. According to the working principle and the strategies of each controller, the CDU wake-up method is set as follows: Figure 2 The various working conditions are as follows:

[0049] When CCst = CC Charging Connected, it means that the charging gun is normally connected. The user needs to charge at this time. The CDU should enter the working state in advance, so it should be awakened normally. This signal awakening is mainly used to wake up the vehicle and charge it when the vehicle is in the Off gear and then plugged in for charging.

[0050] When CCst = CC Discharging Connected, it means that the discharge gun is normally connected. The user needs to discharge at this time. The CDU should enter the working state in advance, so it should be awakened normally. This signal awakening is mainly used to wake up the vehicle and discharge after the vehicle is in the Off gear and the gun is plugged in for discharge.

[0051] When CPst = CP Connected, it means that the user has completed the card swiping, the vehicle should enter the charging state, and the CDU should enter the working state in advance, so it should be awakened normally. This signal awakening is mainly used to wake up the vehicle and charge it when the vehicle is in the Off gear and the gun is plugged in and then awakened by swiping the card;

[0052] When PowerMode2 = IgnitionOn, it means that the user has powered on the vehicle, and all controllers of the vehicle should enter the working state, so they should be awakened normally and support other controllers to work;

[0053] When any controller sends a network management message, it means that other controllers in the vehicle have work requirements and enter the working state. To ensure the normal operation of each controller, the CDU should be awakened normally and support other controllers to work.

[0054] CPst is the abbreviation of CP status, which is sent by CDU and indicates the status of the CP signal in CDU. It reflects whether the charging gun is in the charging state. It contains 4 values, namely CP Disconnected (charging disconnected state), CP Abnormal (charging abnormal state), CP Connected (charging connected state), and Reserved (empty position);

[0055] OBCInCurr is the abbreviation of OBC Input Current, which is sent by CDU and represents the current input to CDU by the charging pile or on-board charger during CDU operation, reflecting the actual current performance of CDU during the charging and discharging process;

[0056] CCst is the abbreviation of CC status, which is sent by CDU and indicates the status of CC signal in CDU, reflecting the connection status of charging gun. It contains 4 values, namely CC Disconnected (charging gun is not connected), CC Half Connected (charging gun is half connected, that is, abnormal connection status), CC Charging Connected (charging gun charging connection status), CC Discharging Connected (charging gun discharging connection status);

[0057] PowerMode2, sent by the vehicle control unit (hereinafter referred to as VCU), indicates the vehicle status, reflects the gear status of the vehicle key and whether the vehicle is in driving state, and contains 8 values, namely Off (key gear is in Off state), Reserved (empty position), ACC (key gear is in ACC state), Reserved (empty position), IgnitionOn (key gear is in On state), Running (the vehicle is in driving state), Reserved (empty position), Invalid value (invalid value);

[0058] ChargePermission_VCU, issued by VCU, indicates whether VCU allows the vehicle to charge and whether charging is completed. It contains 4 values, namely Forbid Charging (forbidden charging state), Permit Charging (allowed charging state), Finish Charging (charging completed state), and Reserved (empty space);

[0059] CDUstate, sent by CDU, indicates the state of CDU, reflects whether CDU is in working state and whether there is any fault, and contains 16 values, namely Reserved, Charge Prepare, ChargeNormal Working, Charge Limited Working, Error (OBC or DC / AC error), Idle (OBC or DC / AC Idle), Charge Connected Prepare, Charge Connectedconfirmed, Charge Control confirmed, Charge Input confirmed, Discharge Connected confirmed, Discharge prepare, Discharge Normal Working, Discharge Limited Working, Reserved, Reserved;

[0060] OBCOutCur is the abbreviation of OBC Output Current, which is sent by the CDU and represents the current output to the battery during the operation of the CDU. It reflects the actual current performance of the CDU during the charging and discharging process.

[0061] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent replacement and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered within the protection scope of the present invention. At the same time, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A method for waking up a high-voltage charging and distribution system assembly, It is characterized in that include: The high-voltage charging and distribution system assembly will be awakened when any of the following conditions are met: Condition 1: CCst=CC Charging Connected; Condition 2: CCst=CC Discharging Connected; Condition 3: CPst = CP Connected; Condition 4: Powermode2 = IgnitionOn; Condition 5: Any controller sends a network management message.

2. A method for hibernation of a high-voltage charging and distribution system assembly, It is characterized in that Specifically, the high-voltage charging and distribution system assembly enters sleep mode if it does not receive any network management message within 1100ms and any of the following conditions are met: Condition 1: CPst=CP Connected&&OBCInCurr=0, for 90s and PowerMode2=Off; or CCst=CC Disconnected for 600ms and PowerMode2=Off; or CPst = CP Disconnected for 600ms and PowerMode2 = Off; or CPst=CP Connected changes to CPst=CP Disconnected and PowerMode2=Off; Condition 2: ChargePermission_VCU = Finish Chagring and CDUstate = Idle (OBC or DC / ACIdle); Condition 3: CDUstate = Charge Connected confirmed, lasting 1900ms or Charge Input confirmed, lasting 1900ms; Condition 4: OBCOutCur<1A, lasting 90s.

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