在这篇文章中，我们学习了如何构建电池深的放电保护电路，该电池可用于通过连接的负载来保护任何类型的电池。
通常，我们主要担心battery getting over charged, and forget about a situation where the battery can get over discharged by the load. Although, overcharging a battery may be detrimental to a battery health and appropriate measures must be incorporated, an over discharge or adeep discharge对于电池的健康也可能同样危险。
In the following paragraphs we will discuss a very simple design for shutting off the battery to the load, as soon as the battery voltage has reached the critical deep discharge state.
该电路是完全固态的，仅使用晶体管进行开关，从而消除了笨重的继电器的需求。
Circuit Specifications
如下所述，该博客的一位专门读者确实要求了这个想法：
寻找一些想法/帮助/建议。我已经使用织机太阳能电池板，偏心电池和偏见太阳逆变器安装了一个2.2 kW的网格太阳能系统。逆变器具有此预设置的优先级，第一个太阳能，然后是网格，最后一个电池。我已经断开了逆变器的电源供应，因此对我来说是太阳能，然后是电池。在此整体设置中，我添加了一个带有GRID的ACCL作为辅助设置。
So in the evening, whenever there is no solar and the battery is out of charge, it falls back to grid power.
This setup has one problem. ACCL switches to mains power at night, when the battery is completely drained out or deeply discharged and that's what I don't want.
当电池剩余电源20％或电池处于一定电压时，我想关闭电池电量。这样，电池寿命就会更好。
这是可行的吗？我们有容易的东西吗？还是我们需要为此建立一些东西？
这Design
拟议电池的电路设计可以在以下图中见证：
可以看出，该电路具有非常组件，并且可以通过以下几点理解其工作：
有几个电源晶体管相互结合，TIP36晶体管形成TIP122晶体管的收集器负载。
TIP122的底座通过电阻器/Zener二极管网络偏置，在该网络中，齐纳二极管zy确定了TIP122的切断电压。
这zener diodevoltage is selected such that it matches the criticallow voltagevalue of the battery, or any value at which the draining of the battery by the load is required to be stopped.
只要电池电压停留在齐纳电压上方，或者需要发生截止的电压，齐纳二极管就会保持导电，从而使TIP122保持在传导模式。
With TIP122 conducting the TIP36 gets the required base current, and it also conducts and allows the battery current to pass to the load.
但是，当电池电压到达或降低齐纳电压以下（也是深层电压水平）的时刻，会导致齐纳二极管停止导电。
当Zener二极管停止进行电导时，TIP122基本电压被切断并关闭。
随着TIP122现在关闭，TIP36无法获得其基本偏置电流，并且还将关闭电池电流到负载。
该过程有效防止电池进一步排水和耗尽其深层排放水平。
指示的负载可以是任何指定的负载，例如逆变器，电动机，LED灯等。
How to Select the Zener Diode
齐纳二极管决定电池需要从负载上切断的电压。因此，齐纳电压必须大约等于需要切断的电池电压。
例如，如果对于12 V电池，则切断的深切值为10 V，则可以选择Zener二极管ZY值为10 V / 1/2瓦。
Using a MOSFET
这indicated TIP36 can supply a maximum current of 10 amps to the load. For higher current, the TIP36 could be replaced with a P-Channel MOSFET such as the MTP50P03HDL, which is rated to handle at least 30 amp current.
当使用MOSFET代替BJT TIP36时，可以用1K电阻器或10K电阻代替50欧姆电阻器，并且可以用BC547替换TIP122。
用单个晶体管添加电池充电器
上面讨论的概念用于处理连接电池的过递送情况。但是，如果您希望上述电路也具有自己的电池充电器，则可以有效地将以下电路用于该过程。
在这里，我们可以在设计的右侧看到一个晶体管阶段，该阶段被配置为发射机跟随器。晶体管是2N6284，其额定值至少可为电池提供10安培电流，这意味着即使可以有效地为100 AH电池充电。
Since the transistor is a Darlington transistor and configured as an emitter follower, the voltage at its emitter will always lag behind its base voltage by 1 V or 1.2 V.
这zener diode must be cautiously selected so that it compensates the emitter drop of 1.2 V by providing a potential at the base which may be 1.2 V higher than the required emitter voltage.
Since the circuit is designed to charge a 12 V battery, the full charge voltage at the emitter of this transistor must be around 14.1 V. This implies that the base voltage of the transistor must be 1.2 V higher than the emitter, which amounts to a value of around 15.2 V to 15.3 V.
这就是为什么必须在上面指定的电压上对齐纳级进行额定值，以生成常数14. 1 V在发射极方侧和连接的12 V电池上。
当电池端子电压达到14.1 V值时为电池充电时，它会逆转2N6284的发射器，该发射器关闭了晶体管的传导，从而停止了电池的进一步充电，并且电池不受充电的防护。。
因此，上面显示的电路实现了2份的1个步骤，即防止电池在深层排放中，并通过使用仅几个晶体管进行充电，并且仍然能够控制一个可能大于12 V 100 AH电池的电池。
Hello, I consider your site a valuable source of consultations especially in power electronics with the topics of three-phase inverters, I have long searched for a three-phase signal generator out of phase at 120 degrees and here you have explained it, I would like to see a generator 180 degree phase shifted 3 phase square wave with operational amplifiers to control the speed of a 12 volt 3 phase motor using a full wave bridge with mosfet.
预先感谢您的合作
尊重的问候
Hello thank you, I am glad you liked this site, however you have asked your question under unrelated article. The above article is about battery deep discharge…for further doubts plese ask your questions in the following article:
//www.addme-blog.com/three-phase-signal-generator-circuit/
My lecturer, Swagatam, can I use ths deep discharge and over charging circuit in the modified sine wave inverter u referred to me as the the best in my workshop as auto cut off in my battery charger?
Thanks Morris, yes you can definitely use the last circuit with themodified sine wave inverter circuit
您好Swagatam，我用哪个充电器电路在我的商店里充电太阳能电池？哪一个是最好的
Hello Morris, please provide the specifications of your battery, I will try to help!
我正在使用100AH太阳能电池。建议我使用哪个与修改的正弦波逆变器一起使用
You can use the last circuit from the above article, it will work for 100Ah battery also. Make sure to use a 10 amp charger as the supply source
Thanks sir. But do have any best 10amp charger?
10安培将取决于变压器或用作输入的SMP电源……您可以在外部购买和连接。
Refer me to your best charger I can use to with my free maintenance battery 100ah sir. Am creating a backup in my shop, therefore I seek your guidance.
您可以参考以下两篇文章，然后选择其中任何一篇，都是好主意：
铅酸电池充电器电路
开车电池充电器电路，自动切断
Please sir does it mean, that the output (to load) can be connected to output of an inverter? (I.e A.c )
上帝，我不明白你的问题吗？
Sir I mean from the first circuit diagram ( To Load), will it be connected to the inverter output A.c positive and negative?
上帝派, yes the load can be an inverter also, to the inverter battery points.