EVSE apart again. I'm not sure how many times this device is going to want to be taken apart before it starts to fall apart but I guess we'll find out. Now I should say that in this video I'm going to be messing around with mains voltages which can be extremely dangerous so please don't copy what I'm doing. I mean I'm 60 years old I've had a good innings so if I make a terrible mistake well it's my fault isn't it? But if you're young and beautiful then I would definitely steer clear of doing things like this. So fair warning given and I'm going to actually make this as safe as I can. I'll explain in a moment. So the idea here is that I'm going to connect this which is a light bulb holder onto the live and neutral outputs of this unit and that's so that I can see when this device turns its relays on and when it's supplying mains to the car which will just be a little terminal block in this instance. And I'm also going to try and simulate what's inside the car to a certain extent as far as I can to see what this device does and whether it thinks it is connected to a car. So let's put my lamp holder through the gland or grommet and attach it to the live and neutral blocks on here and then I'll find a bulb that I can put in there. Now the other two connections that I want access to and I'm going to use one of these wires which I made up some time ago actually for the lighting in my shed 12 volts. Well these two connections have only 12 volts on them so let's put them in there. Now which do I use for

EVSE 再次被拆開。我不知道這臺設備要拆多少次才會開始散架，但我想我們會找到答案的。現在我應該說，在這段視頻中，我將會接觸到電源電壓，這可能會非常危險，所以請不要模仿我的做法。我的意思是，我已經 60 歲了，我有一個好局，所以如果我犯了一個可怕的錯誤，那是我的錯，不是嗎？但如果你年輕貌美，那我絕對不會做這樣的事。所以，我給你一個公平的警告，我會盡可能地保證安全。稍後我會解釋。我的想法是，將燈泡支架連接到設備的帶電和中性輸出端，這樣我就能看到設備何時打開繼電器，何時向汽車供電，在這種情況下，它只是一個小接

Control Pilot and which do I use for Protective Earth? The original wiring had black going to Control Pilot but red on Protective Earth? Yeah not so sure about that. Right so that's my wiring I've put red on Control Pilot CP and black on Protective Earth. So I'm just going to put the back on this thing so that I can flip it over and we can see the display and then we'll try and work out a way of making this think it's connected to a car. Now Control Pilot and

控制引腳和保護接地用哪個？原來的接線是黑色接控制引腳，紅色接保護接地？是的，我不太確定。對，這就是我的接線，紅色接控制先導CP，黑色接保護接地。我現在要把它的背面翻過來，這樣就能看到顯示屏了 然後我們再想辦法讓它以為是連接到汽車上的。現在，控制面板和

Protective Earth I'm going to connect to this terminal block so that I can connect additional things to that. So let's put Protective Earth up there and

我將把保護接地連接到這個接線板上，這樣就可以連接其他東西了。是以，讓我們把保護接地放在上面，然後

Control Pilot down here. So for additional safety I'm going to supply mains to the EVSE from this power bank. It's only capable of 200 watts output.

控制面板在下面為了更安全起見，我將用這個蓄電池為電動汽車充電裝置供電。它的輸出功率只有 200 瓦。

Now that can still kill you if you put one hand on live and the other hand on neutral that will pass across your chest. So it can still be dangerous but it's safer I reckon than putting in full-strength mains from a household socket. So let's connect that up and see this thing come on. So the EVSE has come on. Now Control Pilot and Protective Earth should be galvanically isolated inside this unit from mains. So I should be able to touch those and I can that's absolutely fine. So this should be safe to work on to try and pretend we've got a car connected to this EVSE. Now currently the lamp is not on. I don't know which way this switch goes but certainly mains is not being put through to the lamp. So the relays in the EVSE are off and that's because it's saying plug this thing into a car I can't see a vehicle. So we now have to try and put something on here such that this thinks it's connected to a vehicle. And I've printed out this from the Wikipedia article on J1772 and come on! Ignoring

現在，如果你把一隻手放在帶電的地方，另一隻手放在中性線上，那還是會要了你的命，因為中性線會穿過你的胸膛。所以還是會有危險，但我認為這比從家用插座接上全功率電源要安全得多。那麼，讓我們把它連接起來，看看這東西能不能啟動。EVSE已經接通。現在，控制引腳和保護接地應在設備內部與市電隔離。所以我應該可以觸摸到它們，絕對沒問題。所以這應該是安全的，我們可以試著假裝有一輛車連接到這臺電動車控制器上。現在，燈還沒亮。我不知道這個開關通向哪裡，但可以肯定的是，電源並沒有通到燈上。是以，EVSE 的繼電器是關閉的，這是因

Proximity Pilot for the moment because we know that the wire inside the EVSE connected to the Proximity Pilot pin doesn't go anywhere. It's been cut off so we can ignore all the stuff on the PP pin. But the Control Pilot, this pin 4, goes into a diode and down through a 2.74 K resistor to ground which is protective earth. So if we put a diode and a resistor 2.7 K, I haven't got a 2.74, across those two connections then will the EVSE see this as a car? There is also the option here to switch in a 1.3 K resistor via this relay but we'll come back to that later. Right diode and 2.7 K resistor and I'm going to be really lazy here and just twist these together which I know is really naff but I just can't be bothered to get the soldering iron out so let's twist those together and then I'll connect these to my terminal block and we'll see what happens. Let's actually do this sort of live as it were. Put my finger on there.

因為我們知道，EVSE 內部連接到接近先導引腳的電線並不通向任何地方。它已被切斷，是以我們可以忽略 PP 引腳上的所有內容。但控制引腳，即 4 號引腳，連接到一個二極管，然後通過一個 2.74 K 電阻器接地，即保護接地。是以，如果我們在這兩個連接點上加一個二極管和一個 2.7 K 電阻（我沒有 2.74 K 電阻），那麼電動車控制器會把它看作一輛汽車嗎？我們還可以通過繼電器接通一個 1.3 K 的電阻器，不過我們稍後再討論這個問題。右邊是二極管和 2.7K 電阻器，我想偷個懶，直接把它們擰在一起，我知道

Switching between standby and connecting and the lights, if I take that off, the lights are blue in standby. If I connect that, and of course I'm putting a different resistance on this with my fingers, but it does say connecting. I'm not sure whether it's actually turned the mains on yet. I don't think it has.

在待機和連接之間切換時，如果我把它拿下來，待機時的指示燈是藍色的。如果我把它接上，當然我用手指在上面施加了不同的電阻，但它確實顯示正在連接。我不確定它是否真的接通了電源。我認為沒有。

No, not yet. Now I was just wondering whether this device would time out. I've got my diode and resistor on there permanently. Will this time out if it doesn't see whatever it needs to see to go into charging mode? But it doesn't seem to be timing out. It seems quite happy to wait there and I think the next stage of this is to close this relay as it were and put this, is it 1.3 or 1.2? I think it's 1.3 K there. I'm not sure if I've got a 1.3 K resistor and put that also across, yes it's switched to ground isn't it? So also across this resistor thus pulling this voltage down even further. You see this voltage 12 volt is sourced here, 12 volts. It goes to a 1 K resistor. So by pulling it down through this diode with a 2.74 K resistor, we pull the 12 volts at this point down to about 9 volts and that indicates that the car is connected. So it says connecting. Then the car should respond by closing this switch with an additional resistance further pulling this voltage down from 9 volts to 6 volts and that's probably what will trigger the EVSE to switch on the mains and then this bulb should come on. Well I don't have a 1.3 K but I do have a 1.2 K so let's put that across this resistor and see what happens. And yes it's gone into charging. Now my lamp hasn't come on. That's probably because of that switch.

不，還沒有。我只是想知道這個裝置會不會超時。我已經把二極管和電阻器固定在上面了。如果它看不到進入充電模式所需的任何信號，會不會超時？但它似乎沒有超時。它似乎很樂意在那裡等待，我想下一階段應該是關閉繼電器，然後把這個，是 1.3 還是 1.2？我想應該是 1.3 K。我不確定我是否有一個 1.3 K 的電阻，把它也跨接起來，是的，它是接地的，不是嗎？所以也要跨接這個電阻，從而進一步拉低電壓。你看，12 伏電壓就來自這裡，12 伏。它連接到一個 1 K 電阻器。通過這個二極管和一個 2.74 K 電阻器，我們

Let's try again. There it is. The mains is being sent right through this unit and to the car or in this case that bulb because it can see now that the control pilot signal, the top half of it, and that's the function of this diode, it only pulls the top half of the 1 kHz square wave down to 6 volts and that puts it in charging mode. I take that away. Oh it says end. Okay now let's try a couple of things. I'll turn off the mains which I can do on my power bank. Now what happens if the mains comes on to the EVSE with the connector plugged into the car so it should be seeing this diode and 2.7 K resistor.

讓我們再試一次。就是這樣。市電正通過這個裝置傳送到汽車上，或者在這種情況下傳送到燈泡上，因為它可以看到控制先導信號的上半部分，這就是這個二極管的功能，它只將 1 千赫方波的上半部分拉低到 6 伏，使其進入充電模式。我把它拿開哦，它說結束了。好了，現在我們來做幾個嘗試。我會關閉電源，我可以在我的蓄電池上做到這一點。現在，如果電源接入電動車充電系統，並將連接器插入汽車，那麼它應該會看到這個二極管和 2.7 K 電阻器。

Turn on the mains. The EVSE comes on in standby but then fairly quickly goes into this connecting mode so it doesn't seem to matter if we have this pull down to 9 volts. Remember it's only pulling down the top of the waveform to 9 volts.

接通電源。EVSE 在待機狀態下啟動，但很快就會進入這種連接模式，是以我們是否將電壓拉低至 9 伏似乎並不重要。請記住，它只是將波形的頂端拉低到 9 伏。

The minus 12 part at the bottom of the waveform, and I'll get a scope in a minute, remains at minus 12 volts and I think the idea of that is so that if, I don't know, your type 2 plug was lying in a pool of water and there just happened to be 2.7 K between Protective Earth and Control Pilot, it's unlikely but it could happen, seeing this asymmetry by virtue of this diode means that it's not going to turn the mains on when the connector is lying in a puddle. So now I've connected both resistors in parallel so that we're pulling the top half of the square wave down to 6 volts and it's turned the mains on. Let's turn off the supply to the EVSE so that that drops out and see if it's happy to see this situation immediately it powers on. Put the power on the EVSE, standby and yeah it goes straight into supplying power so the relays have closed and it's supplying mains power to the car so it doesn't seem to mind, there doesn't seem to be any kind of sequencing required, if the conditions are satisfied it just gets on and supplies power to the car. Now one thing I wanted to test, if I short out this diode with a crocodile clip cable then we're going to pull down both the top half of the square wave and the bottom half, will it detect that there is then symmetry on the pull down? No it doesn't, it doesn't seem to care whether the diodes... I'm not sure whether this crocodile clip is any good actually, perhaps I'll try another one. Well let's try this again in the connecting state so my second resistor is disconnected, let's see what happens if the diode is not there and no it doesn't seem to care about that, so it doesn't seem to be taking much notice of whether or not that diode's in circuit. I'll just get another croc clip because I can't be sure this is a good one. Right I've got a new crocodile clip lead, this one's got an S on it which means I've soldered the wire to the crocodile clip because the crimped ones can be quite bad and the little C there means that it's high current, I've got a decent piece of wire on there. So why isn't it going into... oh it's gone into end mode, oh that's interesting, yes but if I put the second resistor across there it immediately goes into charging mode. It's saying end rather than connecting which is slightly odd. Okay let's make it conduct and now short out this diode. No it doesn't seem to care whether or not the pull down on the square wave is symmetric or asymmetric. I think it's time to get a scope and have a look at the square wave on here. So here's my scope hooked up and I'm having to use this additional light here otherwise it bleaches out the screen of the scope, it's just an exposure compensation thing. I suppose I could do that on the camera but never mind I've done this now. So we can see that it's exactly one kilohertz, the width of the pulse is about 10% which is what you want for 6 amps, you can see 6 amps there and if I press the current button in this end state I can actually vary the current so 8 amps is more than 10% that's 10 amps, 13 amps and this one goes up to 16 amps. I can't remember the percentages just at the moment let me check. Right I've done the exposure compensation on the camera now. Oh it's not quite as good is it? How do I adjust that? No that's not working terribly well.

波形底部的負 12 部分（我馬上就會拿到一個示波器）保持在負 12 伏，我認為這樣做的目的是，如果，我不知道，你的 2 型插頭插在水池裡，而保護接地和控制引腳之間剛好有 2.7 千伏，這不太可能，但有可能發生，看到這個二極管的不對稱，意味著當連接器插在水池裡時，它不會接通市電。現在我把兩個電阻並聯起來，這樣就能把方波的上半部分拉低到 6 伏，從而接通電源。讓我們關閉 EVSE 的電源，使其斷電，看看它是否樂意看到這種情況，並立即接通電源。接通 EVSE 的電源，待機，然後它就直接開始供電，繼電器閉合，向汽

It's also put a thing up on my screen so I can't see very well but never mind. So yes you can see I can press the current control button and that just varies the pulse width of this waveform. So let's go back to 6 amps that's a 10% pulse width.

它還在我的螢幕上放了一個東西，所以我看不清楚，不過沒關係。是的，你可以看到我可以按下電流控制按鈕，這樣就可以改變波形的脈寬。讓我們回到 6 安培，即 10%的脈衝寬度。

Now if I close this second resistor which turns on the relays the other thing you can see is that the height of the positive part of the waveform drops to 50% from 75% so 9 volts down to 6 volts but the bottom part of the waveform is unaffected and that's because of the diode. So let's now see what the effect of putting my shorting link across the diode is. I'll hang that resistor over there permanently to turn on the mains. Let's short out the diode.

現在，如果我關閉第二個電阻，繼電器就會打開，你還可以看到波形正極部分的高度從 75% 下降到 50%，是以 9 伏下降到 6 伏，但波形的底部不受影響，這就是二極管的作用。現在讓我們來看看將短路鏈路跨接在二極管上會產生什麼影響。我把電阻永久地掛在那裡，接通電源。讓二極管短路。

Yes the scope should be right with that shouldn't it? And yes you can see there that the bottom part of the waveform is also reduced in amplitude as well as the top but that doesn't seem to be noticed by the EBSE.

是的，示波器應該是正確的，不是嗎？是的，你可以看到波形的下半部分和上半部分的振幅都減小了，但 EBSE 似乎沒有注意到這一點。

Oh why's the screen gone all funny like that? I don't know. Yes I think when this was intermittently contacting and we were glitching the mains on and off like that I think it interfered with the signal going to the display and that went funny. It seems okay now. So yes it's simply a case of a diode and two resistors one to pull the signal down to 9 volts and another one to pull it down to 6 volts that initiates the charging turns on the relays and actually supplies mains well in my case to the bulb but there doesn't seem to be any sequencing required you just simply put the resistors in and even if both resistors are in when you power up the EVSE let's just try that power it down power it up then very quickly it just goes straight into charging mode so no sequencing required it seems. Now something else I wanted to try which is can I change the current while it's in the connecting mode we've seen that I can change it while it's in the end mode whatever that means so that's 16 amps let's turn off the mains turn it back on and see whether I can because it'll go straight into connecting mode because it's got the diode and resistor see if I can change the current now and I can so now let's put it in the charging mode with the second resistor my mains lamp comes on and now pressing the button I can't change the current so as it stands this EVSE wouldn't be able to have the current modulated by for example the amount of solar power coming off my roof while it's charging because it simply doesn't respond to changes in requested current or maximum current while it's in the charging mode you'd have to come out of the charging mode which would be not a very nice thing to do change the current and then go back into the charging mode which is not ideal really and as we've seen this particular EVSE doesn't seem to care if you short out the diode and just have the resistor and then put a second resistor on there it doesn't seem to care whether this signal is pulled down symmetrically or asymmetrically it connects the mains regardless not sure that's ideal really so there we are all you need to make an EVSE think that it's connected to a car is a diode and a resistor and then another resistor to tell it or for it to think that the car is actually charging it's as simple as that cheerio

為什麼螢幕會變成這樣？我也不知道。是的，我想是在間歇性接觸和開關電源時，干擾了顯示屏的信號，所以螢幕才會這樣。現在看來沒問題了。是以，只需一個二極管和兩個電阻，一個將信號拉低至 9 伏，另一個將信號拉低至 6 伏，就能啟動充電，打開繼電器，並向燈泡提供電源，但似乎不需要任何排序，只需將電阻放入，即使兩個電阻都放入，當你給電動車充電時，讓我們試試將其關閉，然後再將其打開，很快它就會直接進入充電模式，是以似乎不需要任何排序。現在我還想試一下，在連接模式下能否改變電流，我們已經看到在終端模式下可以改變電流，不管