Power battery pulse heating system and heating method for electric vehicle

A power battery and pulse heating technology, which is applied to electric vehicles, electric power units, power units, etc., can solve the problems of electric vehicles that are not suitable for dual motors, limited adjustable range of battery pulse current, and limited heating efficiency of battery packs. Achieve the effect of expanding the heating power, reducing the duration of a single heating, and improving the efficiency of pulse heating

Active Publication Date: 2022-05-06
深蓝汽车科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is only suitable for electric vehicles with only one motor, not for electric vehicles with dual motors, and the pulse current adjustable range of the battery is limited, and the heating efficiency of the battery pack is limited

Method used

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  • Power battery pulse heating system and heating method for electric vehicle
  • Power battery pulse heating system and heating method for electric vehicle
  • Power battery pulse heating system and heating method for electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: as figure 1 , figure 2 The power battery pulse heating system of the electric vehicle shown includes a battery management system 2 , a control system 3 , a first motor system 4 and a second motor system 5 . The first motor system 4 and the second motor system 5 may be a driving motor system, a generator system or other motor systems connected between the positive pole and the negative pole of the power battery. The battery management system 2 is connected to the power battery 1. The battery management system 2 monitors the temperature and SOC of the power battery 1 in real time. The battery management system 2 is connected to the control system 3. The battery management system 2 sends a pulse heating start / stop request to the control system 3. The pulse current frequency request value f and the pulse current size request value Ireq, when necessary, the control system 3 sends an error prompt to the battery management system 2 that the current exceeds the ...

Embodiment 2

[0077] Embodiment 2: as Figure 5 , Figure 6 As shown, most of the structure of the power battery pulse heating system of the electric vehicle in this embodiment is the same as that of Embodiment 1, the difference is:

[0078] The battery management system 2 sends the pulse heating start / stop request and the temperature of the power battery to the control system 3, and the control system 3 determines the pulse current frequency request value f and the pulse current magnitude request value Ireq according to the power battery temperature.

[0079] The first motor system 4 includes a first motor controller 41 and a first motor 42, as well as a first controllable switch K1, the first motor 42 is a Y-connected three-phase four-wire motor, the first motor 42 The neutral point leads connected to the first phase stator winding L11, the second phase stator winding L12, and the third phase stator winding L13 are connected to the upper end of the first bridge arm converter through the ...

Embodiment 3

[0107] Embodiment 3: as Figure 5 , Figure 9 As shown, most of the structure of the power battery pulse heating system of the electric vehicle in this embodiment is the same as that of Embodiment 1, the difference is:

[0108] The first motor system 4 includes a first motor controller 41 and a first motor 42, as well as a first controllable switch K1, the first motor 42 is a Y-connected three-phase four-wire motor, the first motor 42 The neutral point leads connected to the first phase stator winding L11, the second phase stator winding L12, and the third phase stator winding L13 are connected to the lower end of the first bridge arm converter through the controlled end of the first controllable switch K1. The seven control output terminals of the control module are respectively connected to the control terminal of the power switch S11 of the upper bridge arm, the control terminal of the power switch S12 of the upper bridge arm, the control terminal of the power switch S13 o...

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Abstract

The invention discloses a power battery pulse heating system and heating method of an electric vehicle, comprising a battery management system, a control system, a first motor system and a second motor system, the battery management system is connected with the power battery and the control system, and the control system is connected with the power battery and the control system. The first motor system and the second motor system are connected, the first motor system is connected to the power battery, and the second motor system is connected to the power battery; it uses the first and second motor systems to perform pulse heating on the power battery, which expands the available pulse current. The adjustment range is also improved, and the pulse heating efficiency of the power battery is also improved, thereby realizing the high-frequency and high-current rapid charge and discharge process of the power battery. By heating the internal resistance of the battery, the purpose of quickly increasing the temperature of the power battery is achieved.

Description

technical field [0001] The invention belongs to the technical field of power battery heating, and in particular relates to a power battery pulse heating system and a heating method of an electric vehicle. Background technique [0002] For electric vehicles, the power battery and the motor system are two important components of the vehicle drive circuit. Among them, the power battery is the source of vehicle power, and its charging and discharging performance will directly affect the performance of the electric vehicle. Lithium-ion batteries have the advantages of high energy, high battery voltage, wide operating temperature range, and long storage life, and are now widely used in power battery systems for electric vehicles. However, in a low temperature environment, the continuous output current capability of the lithium-ion battery will be greatly reduced. In order to improve the continuous output capability of the power battery at low temperature, heating the power batter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K1/00B60L58/27B60L58/10
CPCB60K1/00B60L58/27B60L58/10B60K2001/008Y02T10/70
Inventor 陈富彭钱磊杜长虹陈健林雨婷邓承浩赵伟张扬
Owner 深蓝汽车科技有限公司
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