Tesla Model S/X Coolant Pump: Difference between revisions
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== Overview: == | == Overview: == | ||
[[File:Tesla Model S-X Coolant Pump.jpg|alt=Tesla Model S-X Coolant Pump|thumb]] | [[File:Tesla Model S-X Coolant Pump.jpg|alt=Tesla Model S-X Coolant Pump|thumb|Tesla Model S/X Coolant Pump]] | ||
Both the Model S and X use a very capable (but curiously unbranded) coolant pump. Internet research | Both the Model S and X use a very capable (but curiously unbranded) coolant pump. Internet research seems to indicate it may be made by VariMax<ref name=":0">https://www.diyelectriccar.com/threads/the-teslorean.170770/post-856074</ref>, though there are so many Tesla part numbers it's hard to say which actual model it is. | ||
In ICE circles, this pump is commonly used in high performance intercooler systems, so Lingenfelter Performance Engineering has compiled a fairly thorough (though questionably formatted) | In ICE circles, this pump is commonly used in high performance intercooler systems, so Lingenfelter Performance Engineering has compiled a fairly thorough (though questionably formatted) [https://www.lingenfelter.com/PDFdownloads/L330070000.pdf datasheet on the pump]. Another fairly thorough overview can be found within the [https://www.evcreate.com/using-tesla-thermal-management-system-parts/#tesla-pump EV Create overview of the Tesla cooling system]<ref>https://www.evcreate.com/using-tesla-thermal-management-system-parts/#tesla-pump</ref>. | ||
== Specs == | == Specs == | ||
Some basic specs for the pump are as follows<ref name=":0" />: | |||
- Target flow rate 720 LPH @ 70 kPa | - Target flow rate 720 LPH @ 70 kPa | ||
| Line 15: | Line 17: | ||
- Maximum amp draw: 7.3 Amp | - Maximum amp draw: 7.3 Amp | ||
== Control == | == Control == | ||
The pump can be controlled using PWM. The PWM voltage is 5V and the frequency is a rather unusual 2Hz. The pump speed can be controlled from ~750RPM at 20% duty cycle to ~5000RPM at 80 duty cycle. | |||
== Wiring == | == Wiring == | ||
=== Connector === | |||
The pump has a single 4-pin plug which contains both the power and control signals. The plug itself is Sumitomo “RS” series: | |||
- socket (female): 6189-7757 | |||
- retainer: 6918-1599 | |||
- pins (female): 8240-0263 (0.3-0.5mm2/24-20ga), 8240-0264 (0.85-1.25mm2/20-18ga), 8240-0265 (2.0mm2/16-14ga) | |||
- seals (cable OD): 7165-0474 (1.0-1.4mm), 7165-0473 (1.5-1.9), 7165-0472 (2.0-2.4), 7165-0471 (2.5-2.9/18ga) | |||
As Sumitomo connectors aren't widely available, a better source for this connector is Aliexpress where is is often sold as a complete connector kit | |||
=== Pinout === | |||
[[File:Tesla Model S-X Coolant Pump pinout.jpg|alt=Tesla Model S-X Coolant Pump pinout (photo courtesy of EVcreate)|none|thumb|Tesla Model S-X Coolant Pump pinout (photo courtesy of EVcreate)]] | |||
== Issues == | == Issues == | ||
The pump has a flow sensor, so it will not run empty/dry. Even when primed, the pump takes a moment to spool up. | |||
Annoyingly, the bearing is integral to the impeller, so if you have a noisy pump there is no way to replace just the worn part. | Annoyingly, the bearing is integral to the impeller, so if you have a noisy pump there is no way to replace just the worn part. | ||
Revision as of 00:50, 16 June 2023
Overview:
Both the Model S and X use a very capable (but curiously unbranded) coolant pump. Internet research seems to indicate it may be made by VariMax[1], though there are so many Tesla part numbers it's hard to say which actual model it is.
In ICE circles, this pump is commonly used in high performance intercooler systems, so Lingenfelter Performance Engineering has compiled a fairly thorough (though questionably formatted) datasheet on the pump. Another fairly thorough overview can be found within the EV Create overview of the Tesla cooling system[2].
Specs
Some basic specs for the pump are as follows[1]:
- Target flow rate 720 LPH @ 70 kPa
- Inlet / Outlet connection: 19 MM Barb
- Motor syle: Brushless
- Operating voltage: 8-16 VDC
- Maximum amp draw: 7.3 Amp
Control
The pump can be controlled using PWM. The PWM voltage is 5V and the frequency is a rather unusual 2Hz. The pump speed can be controlled from ~750RPM at 20% duty cycle to ~5000RPM at 80 duty cycle.
Wiring
Connector
The pump has a single 4-pin plug which contains both the power and control signals. The plug itself is Sumitomo “RS” series:
- socket (female): 6189-7757
- retainer: 6918-1599
- pins (female): 8240-0263 (0.3-0.5mm2/24-20ga), 8240-0264 (0.85-1.25mm2/20-18ga), 8240-0265 (2.0mm2/16-14ga)
- seals (cable OD): 7165-0474 (1.0-1.4mm), 7165-0473 (1.5-1.9), 7165-0472 (2.0-2.4), 7165-0471 (2.5-2.9/18ga)
As Sumitomo connectors aren't widely available, a better source for this connector is Aliexpress where is is often sold as a complete connector kit
Pinout
Issues
The pump has a flow sensor, so it will not run empty/dry. Even when primed, the pump takes a moment to spool up.
Annoyingly, the bearing is integral to the impeller, so if you have a noisy pump there is no way to replace just the worn part.