Load-throwing test and solution of indicator panel of 24V battery car
Test product: 24V battery car indicator panel
Temperature and humidity of Leimao laboratory: 26 degrees, 61%.
Test standard: Load-throwing test must pass ISO7637-TP5A.
1. The requirements for testing products and standards are as follows:
|
ISO7637-TP5A |
Us(V) |
Ri(Ω) |
Td(ms) |
INVT(S) |
COUNT(C) |
|
24V |
174 |
2 |
400 |
60 |
5 |
|
24V |
174 |
1 |
400 |
60 |
5 |
2. Lei Mao adopts circuit protection scheme:
3. Test photos and result data records: 
|
Select the model of |
ISO7637-TP5A |
Us(V) |
Ri(Ω) |
Td(ms) |
INVT(S) |
COUNT(C) |
RESULT |
|
SM8S36CA |
24V |
174 |
4 |
350 |
60 |
5 |
normal |
|
SM8S36CA |
24V |
174 |
2 |
400 |
60 |
5 |
normal |
|
SM8S36CA |
24V |
174 |
1 |
400 |
60 |
1 |
damage |
|
P15S36CA |
24V |
174 |
1 |
400 |
60 |
5 |
normal |
Note: the selection of Leimao SM8S36CA can pass 2 ω 400 ms 5 times;
If the 1Ω 400ms test needs to be done, the TVS power needs to be increased, and P15S36CA is selected, which can pass.
Lei Mao is familiar with automobile standards and has a full set of 7637 test equipment for customers to test for free. Please feel free to contact Hu Gong at 18016225001.