Without a good automotive battery, you can plan on running into plenty of problems, especially when you are already running late. By understanding the symptoms of a failing battery, you prevent a lot of headaches.
In this guide, we look at what it means to have a dead cell in a car battery and how to fix a car battery with a dead cell.
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Understanding Battery Cells & How They Work
The car battery is considered a wet cell design.每个电池包含六个电池充满铅合金板和硫酸溶液，称为电解质。
Each cell will produce about two volts of energy, creating the 12-volt battery. The sulfuric acid triggers a chemical reaction between the plates, causing it to produce lead sulfate and ions.
然后，这些离子继续与板上产生化学反应，并产生变成电子的氢。当电子竞争盘子时，产生了电力，这是启动和运行汽车所需的电力。
What Causes A Dead Cell in a Car Battery?
Can a dead cell in a car battery be fixed? It depends on what causes a dead cell in a car battery. Here are a few known causes
Sulfation
当不定期使用汽车电池时，酸和板块坐落在外壳内部。它开始在盘子上变硬and leads to sulfation. The longer it sits without recharging, the more of a problem this becomes.
Age of the battery
Over time, the cells will run out of chemicals needed to continue the process. Old battery cells are also subject to shorts, and erosion can occur due to age. To prevent this, it's important to replace the battery as it gets older.
腐蚀
腐蚀occurs from overcharging and undercharging the battery. Both of these conditions also decrease the battery life overall. As the battery ages, corrosion becomes more of a factor. Thankfully, it is possible to clean off the corrosion, which also produces a better connection.
电子寄生虫
许多事情正在从您的电池中汲取力量。如果他们没有受到检查，则可能导致电池电池死亡。Bad alternators，故障电路和松动端子都应修理，以确保最佳的电池健康。
汽车电池中的死电池：常见的标志
The symptoms of a dead cell in a car battery aren’t difficult to spot. Here are some of the most common dead cell in car battery symptoms to look for.
开始慢
当您转动钥匙并且发动机试图曲柄时，但需要一段时间，这可能表明电池已经死了。随着时间的流逝，您可能会注意到该过程需要更长的时间。
Cranks, but doesn’t start
如果您听到曲柄或仅单击，但汽车引擎不会启动，则可能是死电池或有缺陷的交流发电机。如果是电池，快速起步将使您走下路以更换它。
Dim Lights
随着汽车电池故障，您会注意到灯光开始变暗。大灯和仪表板上的灯都会发生这种情况。
腐蚀
As the battery ages and starts to fail, you might notice more corrosion on the terminals. You can learn如何清洁汽车电池腐蚀, but that won’t change anything if it is already failing.
电池灯亮起
在现代车辆中，汽车配备了大量仪表板灯，以提醒您任何问题。您要寻找的一盏灯就是电池灯，表明充电系统的麻烦。
How To Test A Car Battery For A Dead Cell: (Mechanics Guide)
Before you learn how to fix a dead cell in a car battery, you must first figure out how to test a car battery for a dead cell. Our guide will walk you through the process.
Inspect the Battery
您的第一步是检查电池。您正在寻找损坏的末端，塑料中的裂缝，凸起的情况，泄漏过多或任何可能导致您相信存在问题的变色。
读取电压
With yourvoltmeter，您可以检查电池健康。这是您可以遵循的方便图表。
|
Voltage Level |
百分比收取 |
|---|---|
|
12.7-13.2 |
100 % |
|
12.5 |
90％ |
|
12.4 |
75 % |
|
12.2 |
60 % |
|
12.06 |
50％ |
|
12.0 |
30% |
|
11.79 |
25％ |
|
0-11.9 |
不收费，0％ |
负载测试电池
您可以使用电压表进行自己的负载测试，但是电池必须充满电。您可能还需要一个朋友来提供帮助。
A healthy 12-volt battery should maintain a reading above 9.5 volts while under a load. If it holds but then starts to drop, there is an issue. Most likely, there’s a dead cell.
如何在汽车电池中修复死机
您知道如何修复死车电池电池，还是需要学习如何更换汽车电池中的死电池？在某些情况下，有可能recondition the car batteryand get some more life out of it. However, this only works with some car battery types and requires a few supplies, such as distilled water and Epsom salts.
If you are unable to figure out how to fix a dead cell in a car battery, you are only left with the option to更换汽车电池.
Battery reconditioning will help you learn how to revive a dead car battery cell in many cases, but it won’t fix the problem forever. While you might be able to temporarily learn how to recharge a car battery with a dead cell, eventually, you will need to replace it.
人们也问（常见问题解答）
Can a completely dead battery be recharged?
If the battery recently died, you might be able to use adeep cycle battery charger再次继续前进。但是，大多数死电池都需要替换，因为它们几乎不可能重新栩栩如生，尤其是如果它们已经坐了很长时间。
汽车电池可以保持多长时间？
您可以将充满电的汽车电池静置约两个星期，而无需使用它，并且仍然可以使其继续前进。但是，让它坐在这段时间之外可能会导致它死亡而没有任何复兴的机会。
How many volts should a car battery lose overnight?
The parasitic draw on a car battery should never equal more than 50mA. If you are losing an excessive amount of voltage, you might want to have the electrical system checked before it kills the car battery.
电池应该有多少伏？
When the car battery is fully charged, it should contain 12.6 to 12.8 volts. If you are trying to figure outhow many volts is a car battery, you can use the voltmeter to get the reading. If the reading is much lower than this, it might not start.
结论
Now that we have looked at what causes these problems and how to fix a dead cell on a car battery, you are ready to take charge of the automotive battery health. Ensure you are never left stranded again by caring for your car battery.