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Low-temperature preheating system for battery pack of electric car and method for preheating battery pack

A technology for electric vehicles and battery packs, which is applied to secondary batteries, circuits, electrical components, etc., and can solve problems such as failure of electric vehicles to start normally, poor battery low temperature characteristics, and reduced battery discharge capacity and mileage.

Inactive Publication Date: 2015-04-29
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The application of modern electric vehicles is becoming more and more widespread, but due to the poor low-temperature characteristics of batteries, when electric vehicles work in low temperature conditions, the mileage decreases due to the significant drop in battery discharge capacity, and even electric vehicles cannot start normally.

Method used

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  • Low-temperature preheating system for battery pack of electric car and method for preheating battery pack

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specific Embodiment approach 1

[0013] Specific implementation mode 1. Combination figure 1 Describe this embodiment, a low-temperature preheating system for an electric vehicle battery pack described in this embodiment, which includes a heating device 1, a generator 2, an engine 3, an engine controller 6, a generator controller 5, and a heating system controller 7. Temperature acquisition device 4;

[0014] The heating device 1 is integrated in the battery pack box to heat the battery pack. The temperature acquisition device 4 is used to collect the temperature in the battery pack. The power signal output end of the generator 2 is connected to the power signal input end of the heating device 1. The engine 3 drives the generator 2 to generate electricity, the control signal output end of the generator controller 5 is connected to the power generation control signal input end of the generator 2, the control signal output end of the engine controller 6 is connected to the control signal input end of the engine...

specific Embodiment approach 2

[0016] Specific Embodiment 2. The method for preheating the battery pack in a low-temperature preheating system for an electric vehicle battery pack described in Specific Embodiment 1 is adopted in this paper. The specific steps of the method are:

[0017] Step 1: Use the temperature acquisition device 4 to collect the temperature T in the battery pack.

[0018] Step 2. The heating system controller 7 judges whether the temperature T is less than the threshold temperature T according to the temperature T in the battery pack obtained in step 1. 0 , if T0 Then go to step three; otherwise go to step four;

[0019] Step 3, the heating system controller 7 sends a heating signal to the engine controller 6 and the engine controller 6 controls the engine 3 to drive the generator 2 to generate electricity, and the generator controller 5 controls the generator 2 to supply power to the heating device 1, so as to realize the power supply of the battery pack Heating, and return to step on...

specific Embodiment approach 3

[0022] Specific Embodiment 3. This embodiment is a further description of the method for preheating a battery pack in a low-temperature preheating system for an electric vehicle battery pack described in Specific Embodiment 1. The temperature threshold T 0 is 18°C, the temperature threshold T 1 is 22°C.

[0023] The minimum working temperature of the battery pack in the present invention is 20°C.

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Abstract

The invention discloses a low-temperature preheating system for a battery pack of an electric car and a method for preheating the battery pack, relates to the technical field of low-temperature operation of the electric car, and aims at preheating batteries of the electric car under a low-temperature condition. The heating device disclosed by the invention is used for heating the battery pack; a temperature collecting device is used for collecting temperature in the battery pack; a power supply signal output end of an electric generator is connected with a power supply signal input end of the heating device; an engine is used for driving the electric generator to generate electricity; a control signal output end of an electric generator controller is connected with a power generation control signal input end of the electric generator; a control signal output end of an engine controller is connected with a control signal input end of the engine; a heating control signal output end of a heating system controller is simultaneously connected with the control signal input end of the engine controller and the control signal input end of the electric generator controller; and the heating system controller is used for judging the temperature, which is collected by the temperature collecting device, in a box body of the battery pack, and achieving control on the heating device. The low-temperature preheating system is suitable for preheating the batteries of the electric car.

Description

technical field [0001] The invention relates to the technical field of low-temperature operation of electric vehicles. Background technique [0002] The application of modern electric vehicles is becoming more and more widespread. However, due to the poor low-temperature characteristics of batteries, when electric vehicles work in low temperature conditions, the mileage decreases due to the significant drop in battery discharge capacity, and even electric vehicles cannot start normally. Contents of the invention [0003] The purpose of the present invention is to provide a low-temperature preheating system for electric vehicle battery packs and a method for preheating battery packs thereof in order to preheat electric vehicle batteries under low temperature conditions so that their temperature is higher than the minimum starting temperature. [0004] A low-temperature preheating system for an electric vehicle battery pack according to the present invention includes a heati...

Claims

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Application Information

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IPC IPC(8): H01M10/615H01M10/625H01M10/635
CPCY02E60/10
Inventor 吴晓刚胡宸
Owner HARBIN UNIV OF SCI & TECH
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