Battery temperature control device and method, controller, storage medium and charging and replacing station

Abstract

The invention relates to a battery temperature control device and method, a controller, a storage medium and a charging and replacing station. The device includes a control module and a plurality of water-cooling modules. One or more control valves are respectively arranged on the pipelines, and the control module controls the on-off of each pipeline by controlling the opening and closing of the control valves, so as to control the individual cooling modules of the water-cooling modules connected to the corresponding batteries. number; the water cooling module is used for cooling or heating refrigerant. The invention adopts a modular approach to realize individual control of the temperature of each battery, adapt to the diversity of lithium battery temperature states, and ensure the heat exchange efficiency between the water cooling system and each battery.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a battery temperature control device and method, a controller, a storage medium and a charging and replacing station. Background technique [0002] With the rapid development of electric vehicles, how to quickly realize the energy supply of electric vehicles and make electric vehicles as convenient as traditional fuel vehicles is one of the important problems faced by the electric vehicle industry. The emergence of charging and swapping stations has successfully solved this problem . The charging and swapping station replaces the battery on the car that needs to be replenished with a fully charged battery in the battery compartment, and sends the replaced battery into the battery compartment for charging. Lithium-ion batteries are the core components of electric vehicles, which determine their key indicators such as charging time at charging and swapping stations, mi...

AI Technical Summary

Problems solved by technology

[0004] (1) The cooling capacity and heating capacity of a single water-cooling system are limited. When the temperature of the delivered battery is too high or too low, causing the heat exchange between it and the fluid to be greater than the cooling capacity or heating capacity of the water-cooling system, it will The temperature of the fluid provided by the water-cooling system cannot be maintained at the set value, thus affecting other batteries whose temperature is within a reasonable range and being charged

[0005] (2) Since the temperature states of each battery are different, the water supply temperature of the water cooling system can only be set to a temperature value that comprehensively considers the thermal performance of all batteries, but this will greatly reduce the heat exchange between the water cooling system and a single battery, increasing The charging time of the battery will reduce the safety and life of the battery when charging the battery, and will cause a waste of the performance of the water cooling system

[0007] (4) The viscosity of 50% ethylene glycol is also greatly affected by temperature. If one water cooling system corresponds to multiple batteries in the existing charging and swapping station, the temperature of the battery just sent to the charging and swapping station may be too low , the heat exchange between the water-cooling system and the battery is greater than the heating capacity of the water-cooling system, resulting in the water temperature provided by the water-cooling system being too low, and the capacity of the water pump is not enough to provide sufficient flow, thus affecting the performance of all lithium batteries corresponding to this water-cooling system cooling

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