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INVENTION
Russian Federation Patent RU1353249
Capable of charging nickel-hydrogen storage batteries with an associated separate storage of hydrogen
Name of the inventor: Galkin VV .; Lapshin VY .; Lihonosov YSD .; Shedrov GI
The name of the patentee: Research and Production Enterprise "Saturn"
Address for correspondence:
Starting date of the patent: 1985.11.25
The invention relates to the electrical industry and concerns a method for charging nickel-hydrogen batteries (AB) with an associated separate hydrogen storage at their operation in different conditions. The purpose of the invention - improving process efficiency by providing a guaranteed minimum charge overcharge. Nickel-hydrogen AB charged charge-discharge cycles and charge when disconnected from the reduction of the flow rate of hydrogen in the battery container with a hydrogen absorber. The method provides a guaranteed charge AB, regardless of changes in its energy characteristics and mode of operation.
DESCRIPTION OF THE INVENTION
The invention relates to electrical industry and can be used under different operating conditions of nickel-hydrogen rechargeable battery (AB).
The purpose of the invention - improving process efficiency by providing a guaranteed charge limited overcharge.
According to the method a charge of nickel-hydrogen AB associated with separate hydrogen storage accomplished by carrying out charge-discharge cycles, the battery disconnection depending on the flow rate of hydrogen in the battery container with a hydrogen absorber, for example nickelide lanthanum (LaNi 5). At the end of the charge rate of hydrogen evolution AB container is reduced due to its partial consumption of oxygen ionization generated during overcharge. Deactivate the charge is made to reduce the hydrogen flow rate.
The figure shows a typical plot of the hydrogen stream from the AB in a container with LaNi 5 on the charge time at a current I = 0,2 C n where C n - nominal capacity of the battery.
Charge nickel-hydrogen AB associated with separate storage of hydrogen is as follows.
The charge carried a current variable (I-3). Between the battery container is installed and a semiconductor gas flow sensor.
The flow sensor measures the flow of hydrogen in a container with AB LaNi 5. The sensor output signal corresponding to the "utility" of the charge current (I n = I · 3 
I, where I - output current (charge efficiency) is compared with the value I 3. Once the output current becomes smaller than the set value, e.g. I <0,2, AB comes off from the charge.
EXAMPLE Example 1. The charge current I AB performed 3 = 0.2 C H, where C n = 24 Ah, i.e. 4.8 A current charging AB, hydrogen is released, there is a flow of hydrogen in the AB container LaNi 5 hydrogen absorber, hydrogen gas stream passes through the flow sensor, an analog output signal which corresponds to the flow rate of hydrogen in a container with LaNi 5. The drawing shows a graph of the hydrogen flow rate into the container AB LaNi 5, depending on the charging time when charging current of 4.8 A. The graph shows that the rate of hydrogen flow (AB cuts) remains constant during the first 4 hours of charge of the battery.
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Further, the charge efficiency As a result of experiments on charge AB proposed method revealed that the hydrogen flow rate is a reliable criterion for the timely terminate the charge, but the charge disabling AB best conducted to reduce the hydrogen flow rate to a value of not more than 0.02 of maximum hydrogen flow rate for a given V max charge current. |
<0.2, the charge stop AB. Capacity obtained battery at a charge, is determined by the discharge capacity at a discharge current of 0.2 C AB BC. The test results are shown in Table. EXAMPLE 2. EXAMPLE AB charge was carried out analogously to Example 1, however, a current of 4.8 A. The AB is disconnected from the charge when the flow rate of 0,02 V max, ie 0.404 l / h (D point). These tests are shown in the table.
EXAMPLE 3 Charge Example AB was carried out analogously to Example 1, however, a current of 4.8 A. The AB is disconnected from the charge at the termination of the hydrogen stream (point E). These tests are shown in the table.
The table shows that the proposed and known methods provide a guaranteed charge, however, the proposed method does not possess inertia and provides off from AB the charge with a slight overcharge when safe operation.
The technical advantage of the process is to provide a guaranteed charge limited overcharge regardless of changes in the energy characteristics of AB at the time of operating mode and battery. The method may be used to change the charging current over a wide range. charge current range with this method is limited only to the technical characteristics of gas flow sensor.
CLAIM
Capable of charging nickel-hydrogen storage batteries with an associated separate storage of hydrogen by means of charge-discharge cycles, control the battery state of charge in the charge mode and the termination process for achieving a controlled parameter previously set value, characterized in that, in order to increase the efficiency of the process, control the speed The hydrogen flow is stopped and this process while reducing the speed.
print version
Publication date 13.01.2007gg
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