EV Battery Heating Pre-Detection for Faster Cold Starts
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Solution Overview
Problem
Existing battery heating control methods in electric vehicles are too simplistic and only consider battery voltage, temperature, and remaining capacity, leading to long user waiting times during the heating process without considering the entire vehicle perspective.
Innovation Solution
A comprehensive battery heating control method that combines vehicle self-detection with battery self-detection, using interaction signals between a person and a vehicle to trigger pre-detection logic and initiate battery heating quickly, ensuring accurate identification of heating needs and avoiding ineffective heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If battery heating control is based only on battery voltage, temperature, and remaining capacity detected by BMS, then the control logic is simple, but the user waiting time during heating is long
Solution Approach 1:
The system performs preliminary detection of battery state and heating requirements before the user actually needs heating. When the BMS detects that battery temperature is below the threshold and heating is required, it proactively initiates heating control in advance, so that when the user arrives or requests heating, the battery is already warmed up or heating has started, thereby reducing user waiting time without significantly increasing system complexity
Solution Approach 2:
The system implements continuous feedback monitoring of battery temperature, voltage, and remaining capacity during the heating process. The BMS repeatedly detects these parameters and adjusts heating control based on real-time battery state, ensuring heating stops when the threshold is reached or when charging/discharging conditions change, thus optimizing heating timing and reducing unnecessary waiting time while maintaining simple control logic
2Device complexity
If battery heating is initiated only after driver in-place condition is met, then the control logic is simple, but the battery heating response is delayed
Solution Approach 1:
The system performs preliminary detection and pre-initiates heating control when the BMS detects low battery temperature, without waiting for the driver in-place condition. This allows heating to start in advance, improving heating response speed while keeping the control logic relatively simple by adding only one detection condition (battery temperature threshold) before the existing driver in-place check
Solution Approach 2:
The system dynamically adjusts the heating initiation condition based on real-time battery state. Instead of a fixed rule requiring driver in-place first, the system becomes dynamic by adding temperature-based early initiation: when battery temperature < threshold, heating starts immediately without waiting for driver in-place, whereas when temperature ≥ threshold, the original driver in-place condition applies. This dynamic adaptation improves response speed while maintaining logical simplicity
3Device complexity
If heating is performed without comprehensive vehicle perspective, then the control logic is simple, but heating efficiency is low
Solution Approach 1:
The system merges battery state detection (temperature, voltage, remaining capacity) with vehicle state detection (driver in-place condition, charging/discharging status) into a unified heating control decision. The BMS integrates multiple detection results to determine heating initiation and termination, achieving comprehensive heating efficiency by considering both battery and vehicle perspectives without significantly increasing control logic complexity
Solution Approach 2:
The BMS performs multiple functions: it detects battery temperature, voltage, and remaining capacity; it monitors vehicle state (driver in-place, charging/discharging); and it makes heating control decisions based on all these inputs. This multi-functionality allows the system to achieve high heating efficiency by comprehensively considering all relevant factors while maintaining a single integrated control logic rather than separate complex systems
Data Source
AI summary
Provided are a battery heating control method and apparatus, an electric vehicle, and a storage medium. The method includes: detecting whether the state of a battery meets a preset state condition when a first signal is detected; and performing heating control on the battery according to the situation in which the state of the battery meets the preset state condition. The pre-detection logic of a battery heating function is triggered by detecting the first signal. Since the first signal includes an interaction signal between a person and a vehicle, the pre-detection logic of the state of the battery is prior to the in-place condition of a driver. As a result, after it is determined that the state of the battery meets the condition, the battery heating function can be quickly started at any time.