Battery detection products to dispel doubts
To understand battery testing products, we first need to understand knowledge: first, what is the
car battery used to do? Two, what are the characteristics of the car battery? What are the effects
of these features? Third, how does our product test for these characteristics
ONE. What is the car battery used for?
We all know that cars have batteries, but maybe some people do not know why cars have
batteries, here, we briefly introduce the car battery is used for what.
The purpose of automobile battery is mainly used for automobile, motorcycle, tractor, diesel
engine, lighting, air conditioning, multimedia and so on. The automobile battery plays the role
of voltage stabilizer of the whole electric system, which can mitigate the impulse voltage in the
electric system and protect the electronic equipment on the automobile. When the car engine
stops running or at low idle speed, the battery supplies power to the car electrical equipment.
Batteries also supply electricity when demand exceeds the capacity of the generator. When the
generator is working properly, the car battery stores the excess electricity produced by the
generator.
Of these uses, the battery has the greatest impact on the car, starting. Automobile starting
principle: In order to make the engine transition from static state to working state, the crankshaft
of the engine must be rotated by external force, so that the combustible mixture is sucked (or
formed) in the cylinder and combustion expansion, the working cycle is automatically carried out.
The whole process from the time the crankshaft begins to turn under external force until the
engine starts to idle automatically is called engine starting.
There are many ways to start an engine. The motor starting of automobile engine is commonly
used as mechanical power. When the gears on the motor shaft engage with the rings of teeth
around the engine flywheel, power is transferred to the flywheel and crankshaft, causing them to
turn. The motor itself uses batteries as energy. At present, most car engines are started by
electric motors.
Car starting process is a process of high current operation. Cars need 100 to 300 AMps to start.
The following is a specific description of how much current the car needs to start: 1, gasoline
engine starting battery output current can reach 200-600 a, diesel engine starting, battery
output current can reach 1000 A. 2. The larger the displacement of the general engine, the larger
the starting current, the different engines with different starters, the starting power of the car is
usually between 1 kw and 3 kW. 3, when starting the engine, the battery will release a very large
current, so as to start the engine smoothly.
Two, what are the characteristics of the car battery?
Because of the characteristics of the battery structure, resulting in its discharge characteristics,
there are certain rules. Here we have to talk about CCA (CCA value of battery). Cold Cranking
Ampere (CCA) is the amount of current released by a battery for 30 seconds at a specified low
temperature (usually 0℉or -17.8 ℃) before the voltage drops to the limit feed voltage. For
example, a 12-volt battery case is labeled with a CCA value of 600, which means that at 0°F,
600 amperes (Ampere) can be supplied for 30 seconds before the voltage drops to 7.2 volts
The focus of CCA is to test the discharge capacity of the battery to ensure reliable and realistic
energy for the use of the starter. We can see the mark of "110Ah/450A" on many foreign starter
experiment reports and drawings, which means that the starter can meet the cold starting test of
the engine under the environment of -17.8 ℃using 110Ah battery with cold starting current
CCA 450A. If we only notice the capacity of the battery 110Ah and ignore the cold start current
capacity, in accordance with the same specifications for engine cold start test, our test is likely to
fail, the result is that it is possible to require the starter manufacturer to replace a higher power
level of the starter product, or increase the capacity of the battery to solve the cold start problem.
This is because of the difference between the manufacturing level of Chinese battery and the
international level. The cold starting current of Chinese 110Ah battery is 370A ~ 400A, and
foreign 110Ah battery with 450A cold starting current is equivalent to our 150 ~ 160Ah battery.
Therefore, the gradual introduction of cold start current value CCA to standardize engine cold
start test and battery selection is imperative for Chinese automobile industry to fully converge to
international standards!
If some brands of batteries do not have a type number, the CCA value of the battery can be
estimated using the following method.
The vehicle displacement is approximately CCA value
1,200~1,600CC 350A
1,600~2,000CC 500A
2,000 to 3,000CC 650A
750A over 3,000CC
The above example or a little abstract, let's take an example to analogy: everyone knows that
our bucket of water, battery capacity (XXAh), is equivalent to how much we can hold the
bucket. The discharge capacity (CCA, cold start capacity) is equivalent to the mouth of my
bucket, how fast the water can be poured.
Because of the structural characteristics of the battery, its cold starting ability and its capacity are
generally in proportion, so we can judge the health of the battery as long as we measure its cold
starting ability in the process of testing.
So the car battery, we generally from three aspects to understand it: capacity, CCA, voltage
(electricity). Of course, we also do some tests for battery charging, generator and so on.
Three, how does our product test for these characteristics?
Regarding battery testing, our products classify it into three major items: 1. Battery testing; 2.
Start the system test; 3. Charging test
1. Battery test.
In this function module, we calculate the health of the battery through the cold start capability
(calculated by internal resistance transfer), the amount of electricity (calculated by voltage
conversion), and the rated cold start current of the battery manually input by the user
2. Start the system test.
In this function module, we can intuitively understand the cold start capability of the battery by
monitoring the voltage change of the battery during the engine ignition process and obtaining
the lowest point of the voltage (black and white screen products) or forming a waveform diagram
(color screen products)
3. Charging test
In this functional module, we check the voltage change through load test, no load test, ripple test
and other tests under the ignition state, so as to roughly judge the robustness of the charging
module
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