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4 based on the internal resistance measurement and the state of the battery management system more

Studies have shown that, with the battery charge - discharge cycles increases, the battery capacity decline,Laptop Battery the battery's internal resistance increases, the battery internal performance degradation and eventually complete failure of the process is a gradual and cumulative process, inconsistencies in the battery group will speed up battery pack into the state of insecurity. Normal 0 7.8 磅 0 2 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:普通表格; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Laptop battery Dell Laptop Battery

This paper presents a comparison of the internal resistance measurement and state battery management system, as shown in Figure 1 in order to control the microcontroller core, pre-stored in the memory of all single battery terminal voltage under different resistance values of the initial value and the error allowed the charging process of each single cell in different sections of the terminal voltage of the terminal voltage rise rate and error to allow the value of the cumulative amount of book value of charge, charging voltage, the discharge voltage range, charging cut-off voltage, the discharge cut-off voltage, battery temperature range, the charge current value, and charging current error to allow the value of discharge current to protect the value of a balanced start voltage value, the value of parameters such as voltage imbalance. Charging and discharging process of charging and discharging process of testing various parameters in each charging process before the process of charging and charging after the battery pack to measure and record each single battery terminal voltage, IBM 08K8193 Battery terminal voltage rising rate, the charge current , charge volume and battery internal resistance, and with measured and recorded before the charging parameters to compare, analyze the amount of battery charge and the single battery internal resistance, terminal voltage, terminal voltage rising rate of change in volume, to determine the internal battery Normal 0 7.8 磅 0 2 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:普通表格; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}  TOSHIBA PA3307U-1BRS Battery  TOSHIBA PA3383U-1BRS Battery   performance of the process and extent of the gradual deterioration of battery failure and possible to be an early warning of security problems. The charge and discharge process for the implementation of control for charge and discharge termination voltage protection, temperature protection, overcurrent protection, while the process of charging, through the lower voltage batteries make up the monomer flow balanced approach, so that in series battery terminal voltage of each single cell line, to avoid the status of each single cell battery life difference on impact.

Valve-regulated lead-acid batteries (VRLAB) the electrolyte inside the battery all the adsorbed membrane, there is no free electrolyte, is a typical liquid-depleted battery. VRLAB Since its inception, because of its easy operation and maintenance, release fewer harmful gases,Toshiba Laptop Battery environmental pollution substantially reduced, and by the users. After running the past few years after use has also exposed some problems, mainly in its short life, generally less than 5 years, and its design life of more than 10 years falls far short of the standard requirements. Through more than just the battery failure analysis and testing, to show that many batteries is due to improper use, Toshiba PA3506U-1BRS Battery, Toshiba PA3591U-1BRS Battery, Toshiba Portege 4000 Battery, Toshiba Satellite A10 Series Battery, or use the ambient temperature is too high, excessive water loss caused by the battery too fast, so that the battery can not be a chemical reaction, resulting in early termination of the life of the battery. Dry electrolyte is an important cause of failure VRLAB users in the use with the process, a long period of overcharge, resulting in a large number of water electrolysis to produce gas from the deflated valve lost; same time, because the reasons for the battery housing density, the battery length time at high temperature, dry conditions are also easily lost through the shell of water. Test to prove: the electrolyte in the water more than 15% loss of battery capacity will also be lost more than 15%. Battery capacity below 85%, which marks the termination of battery life. Under normal circumstances, failure can be a pure dry add some moisture supplement, to restore the battery TOSHIBA PA3384U-1BRS Battery  Toshiba PA2487UR batterycapacity. Failure due to dry so that the electrolyte in the water loss is too large, so that increasing the concentration of membrane in the electrolyte, charge-discharge when a larger concentration polarization, so that the battery terminal voltage in a very short period of time to reach the required values.

Figure 1 compared with the internal resistance measurement and the state of the battery management system function diagram

The system for 10 20Ah batteries in series tests, using 5A constant current charging, 2A make up a balanced flow of the system make up a balanced flow of effect is very obvious  TOSHIBA PA3465U-1BRS Battery   that no additional heat, but also to facilitate energy-saving control.

Many factors affect the resistance changes, especially for battery internal resistance within the full life-cycle variation of the study, requires a lot of experiments, the experimental program under way, including the power battery discharge in a simulated operating conditions throughout the life of the process of testing.