254 lines
7.3 KiB
C
254 lines
7.3 KiB
C
/********************************************************************************
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Copyright (C), Sinowealth Electronic. Ltd.
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Author: Sino
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Version: V0.0
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Date: 2020/04/26
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History:
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V2.0 2020/04/26 Preliminary
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********************************************************************************/
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#include "Main.h"
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BOOL bBalanceFlg;
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BOOL bBalancingFlg;
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BOOL bBalanceOddFlg;
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BOOL bCTOValidFlg; //当电芯压差超过1200mV时，才认为存在断线，主要解决电芯电压低于2V情况下
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BOOL bCellOpenDecFlag;
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U16 xdata uiBalanceChannel;
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U8 xdata ucBalanceTimeCnt;
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U8 xdata ucBalanceStep;
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U8 xdata ucCellOpenDecCnt;
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U8 xdata ucCtoCnt;
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/*************************************************************************************************
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* 函数名: BalTurnOnCheck
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* 参 数: 无
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* 返回值: 无
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* 描 述:
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1. 平衡开启条件是电压、压差及电流 同时满足
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2. 平衡过程中，不再进行平衡检测
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3. 断线检测借用平衡
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*************************************************************************************************/
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void BalTurnOnCheck(void)
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{
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U8 i;
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if(!bBalancingFlg && !bCellOpenDecFlag) //在一个平衡周期中或开启断线检测时不判定是否进行平衡
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{
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if(bBAL_EN)
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{
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uiBalanceChannel = 0;
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if(((uiCellVmax>E2uiOVvol)&&(!bOV)) //发生温度保护时不进行平衡,判定进入过压、过压恢复、进入充电截止时暂停平衡
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||((uiCellVmax < E2uiOVRvol)&&(bOV))
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|| bOTC || bUTC || bOTD || bUTD)
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{
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bBalanceFlg = 0;
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ucBalanceTimeCnt = 0;
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}
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else
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{
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if(((uiCellVmax>E2uiBalanceVol) && (uiCellVmax-uiCellVmin)>=E2uiBalanceVolDiff) && (Info.slCurr>=E2siBalCurrent))
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{
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if(!bBalanceFlg)
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{
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ucBalanceTimeCnt++;
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}
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if(ucBalanceTimeCnt >= BAL_DELAY_CNT)
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{
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for(i=ucCellNumOffset; i<ucCellNumOffset+ucCellNum; i++)
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{
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if(((Info.uiVCell[i]-uiCellVmin)>=E2uiBalanceVolDiff)&&(Info.uiVCell[i]>=E2uiBalanceVol)) //电芯电压大于平衡电压，且压差大于阈值，开启该电芯平衡
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{
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uiBalanceChannel |= (1<<i);
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}
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}
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bBalanceFlg = 1;
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}
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}
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else
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{
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bBalanceFlg = 0;
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ucBalanceTimeCnt = 0;
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}
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}
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}
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}
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}
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/*******************************************************************************
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Function: CTOCheckVol(void)
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Description:
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Input:
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Output:
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Others:
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*******************************************************************************/
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BOOL CTOCheckVol(void)
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{
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BOOL bResult=0;
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if(bCTO_EN) //判断是否支持断线检测
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{
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if(!bCTO) //如果已经检测到断线，则不再检测
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{
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if(bCTOValidFlg) //判断电压压差是否超过1.2V
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{
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if(uiVadcVmin < VOL_CELL_CUT_180MV) //180mV
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{
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bResult = 1;
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if(++ucCtoCnt >= TIME_50MS_500MS) //断线 500mS
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{
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bCTO = 1;
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}
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}
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else
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{
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bCTOValidFlg = 0;
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ucCtoCnt = 0;
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}
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}
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}
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#ifdef SP_CTO_RECOVER
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else //断线恢复功能，每250mS一个周期判断最小电压
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{
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if(uiVadcVmin >= VOL_CELL_CUT_180MV) //180mV
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{
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if(++ucCtoRCnt >= TIME_250MS_1S)
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{
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bCTO = 0;
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}
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}
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else
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{
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ucCtoRCnt = 0;
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}
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}
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#endif
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}
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return bResult;
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}
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/*************************************************************************************************
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* 函数名: BalProcess
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* 参 数: 无
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* 返回值: 无
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* 描 述:
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1. 平衡周期分为5个STEP，合计250mS
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2. 平衡效率<100/(250mS*2)(采用奇偶平衡)
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3. 如果检测到断线，则持续开启平衡进行断线检测
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4. 平衡开启后，正常的电压保护判断延时可能会多延时250mS(一个平衡周期)
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*************************************************************************************************/
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void BalProcess(void)
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{
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U16 BalChTemp;
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//判断电芯电压压差是否超过1.2V，如果超过则允许判断断线，主要解决电芯电压<2V情况下平衡会触发断线判断条件
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//判断电芯最大电压是否小于1.38V，如果小于则允许判断断线，主要解决未有效检测电芯电压的情况下压差不满足断线判断条件
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if((uiCellVmax-uiCellVmin>=VOL_CELL_CUT_1200MV) || (uiCellVmax<=VOL_CELL_CUT_1380MV))
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{
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bCTOValidFlg = 1;
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}
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switch(ucBalanceStep)
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{
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case BALANCE_ENABLE: //VADC采集的数据用于正常电压判断
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if(bCellOpenDecFlag || bBalanceFlg)
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{
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if(bBalanceOddFlg) //odd balance
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{
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BalChTemp = uiBalanceChannel&0x5555;
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}
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else //even balance
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{
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BalChTemp = uiBalanceChannel&0xAAAA;
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}
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AfeBalCtl(BalChTemp); //开启平衡
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ucBalanceStep = BALANCE_START;
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bBalancingFlg = 1;
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}
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break;
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case BALANCE_START: //VADC采集的电压数据丢掉
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ucBalanceStep = BALANCING;
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break;
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case BALANCING: //VADC采集的电压数据判断断线
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if(!CTOCheckVol()) //如果发现有断线则连续检测断线
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{
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AfeBalCtl(0); //关闭平衡
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ucBalanceStep = BALANCE_DISABLE;
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bBalanceOddFlg = ~bBalanceOddFlg;
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}
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break;
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case BALANCE_DISABLE: //VADC采集的电压数据丢掉
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if(!CTOCheckVol()) //如果发现有断线则连续检测断线
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{
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ucBalanceStep = BALANCE_NULL;
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}
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else
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{
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ucBalanceStep = BALANCE_ENABLE;
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bBalanceOddFlg = ~bBalanceOddFlg;
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}
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break;
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case BALANCE_NULL: //VADC采集的数据用于正常电压判断
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ucBalanceStep = BALANCE_ENABLE;
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bCellOpenDecFlag = 0;
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bBalanceFlg = 0;
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bBalancingFlg = 0;
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break;
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}
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}
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/*************************************************************************************************
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* 函数名: CellOpenProcess
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* 参 数: 无
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* 返回值: 无
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* 描 述: 每2S开启一次断线检测
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*************************************************************************************************/
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void CTOTurnOnCheck(void)
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{
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#ifdef SP_CTO_RECOVER
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if(bCTO_EN) //支持断线恢复
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#else
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if(bCTO_EN && !bCTO) //如果已发生断线则不检测
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#endif
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{
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if(++ucCellOpenDecCnt >= TIME_50MS_2250MS) //2S
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{
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ucCellOpenDecCnt = TIME_50MS_2250MS; //避免该检测周期是平衡的偶数倍关系
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if(!bBalancingFlg) //如果正在平衡，则等一个平衡周期结束后再开启断线检测
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{
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ucCellOpenDecCnt = 0;
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bCellOpenDecFlag = 1;
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uiBalanceChannel = 0x03ff;
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}
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}
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}
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}
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/*************************************************************************************************
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* 函数名: BalanceProcess
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* 参 数: 无
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* 返回值: 无
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* 描 述: 平衡与断线检测处理
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*************************************************************************************************/
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void BalanceProcess(void)
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{
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BalTurnOnCheck(); //检测是否满足平衡开启条件
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CTOTurnOnCheck(); //定时开启断线检测
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BalProcess(); //处理平衡和断线时序
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}
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