Power control method and system for vehicle power battery pack
A power battery pack, vehicle power technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve the problems of potential safety hazards, low output or input power of power battery packs, and high heat, and improve accuracy. , to ensure the effect of safety
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Embodiment approach 1
[0054] Embodiment 1: Calculate the internal resistance increment of the battery unit by acquiring the expected internal resistance corresponding to the usage time of the battery unit at the current moment.
[0055] In this embodiment, the corresponding relationship between the service time of the battery unit and the expected internal resistance may be stored in advance. Specifically, the internal resistance of the battery unit usually gradually increases with the use time, and the developer can save the corresponding relationship between the use time of the battery unit and the expected internal resistance according to the relevant test results. It will be appreciated that the shorter the interval of usage time that is saved, the more accurate the resulting expected resistance will be.
[0056] usage time
Expected internal resistance
T1
R 预期 1
T2
R 预期 2
T3
R 预期 3
T4
R 预期 4
…
…
[0057] Table 1
[0058] Please re...
Embodiment approach 2
[0061] Embodiment 2: Calculating the internal resistance increment of the battery unit by acquiring the expected voltage corresponding to the current charging amount of the battery unit.
[0062] In this embodiment, the correspondence relationship between the current charging amount of the battery unit and the expected voltage may be stored in advance. Specifically, the developer can save the corresponding relationship between the current charging amount of the battery unit and the expected voltage according to the relevant test results. It can be understood that the smaller the interval between the stored current charge levels, the more accurate the resulting expected voltage will be.
[0063] current charge
expected voltage
10％
U 预期 1
20％
U 预期 2
30％
U 预期 3
40％
U 预期 4
…
…
[0064] Table 2
[0065] Please refer to the example in Table 2, which summarizes the corresponding relationship between the current charge l...
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