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Charging circuit for battery pack of electric vehicle and electric vehicle

A technology of electric vehicles and charging circuits, which is applied in the direction of electric vehicles, battery circuit devices, charge equalization circuits, etc., can solve problems such as insufficient infrastructure construction of DC fast charging piles, and achieve pain points in use, low difficulty in transformation, and reduced dependence degree of effect

Pending Publication Date: 2021-12-28
LEADRIVE TECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, on the electric vehicle side, more and more cases are equipped with 800V high-voltage busbar systems, but the infrastructure construction of DC fast charging piles compatible with 800V battery systems is insufficient

Method used

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  • Charging circuit for battery pack of electric vehicle and electric vehicle
  • Charging circuit for battery pack of electric vehicle and electric vehicle
  • Charging circuit for battery pack of electric vehicle and electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] see figure 1 and figure 2 , shows a schematic diagram of the circuit design of the charging circuit in the first embodiment, wherein the first fixed end is connected to one end of the second battery, the second fixed end is connected to the other end of the second battery; one end of the first battery is charged with 800V The terminal is connected, and the other end of the first battery is connected to the 400V charging terminal.

[0049] When the 800V charging terminal and the 400V charging terminal are connected to the DC charging base, the throwing blade of the double-pole double-throw switch is connected to the first moving terminal and the second moving terminal, and the first battery and the second battery are connected in parallel to the 800V charging terminal and the 400V charging terminal. Between the terminals, a first charging circuit is formed from the 800V charging terminal, the first battery, and the 400V charging terminal, and the second charging circui...

Embodiment 2

[0053] see image 3 and Figure 4 , shows a schematic diagram of the circuit design of the charging circuit in the second embodiment, wherein the first fixed end is connected to one end of the first battery, and the second fixed end is connected to the other end of the first battery. One end of the second battery is connected to the 400V charging terminal, and the other end of the second battery is connected to the 0V charging terminal.

[0054] When the 800V charging terminal and the 0V charging terminal are connected to the DC charging base, the throwing blade of the double-pole double-throw switch is connected to the first moving terminal and the second moving terminal, and the first battery and the second battery are connected in series with the 800V charging terminal and the 0V charging terminal. Between the terminals, a fourth charging circuit is formed from the 800V charging terminal, the first battery, the second battery, and the 0V charging terminal. At this time, t...

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PUM

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Abstract

The invention provides a charging circuit for a battery pack of an electric vehicle and the electric vehicle. The charging circuit comprises an input end group, wherein the input end group comprises a high-voltage input terminal, a low-voltage input terminal and a negative terminal; a switch group comprising a double-pole double-throw switch and a connecting end, wherein the connecting end comprises a first control end group and a second control end group which are electrically connected with the input end group. The battery pack of the electric vehicle comprises a first battery and a second battery, two ends of one of the first battery and the second battery are connected with a fixed end group of the double-pole double-throw switch, and two ends of the other one are connected with an input end group; when the double-pole double-throw switch is switched between the first control end group and the second control end group, the first battery and the second battery are switched between a series connection state and a parallel connection state, so that the first battery and the second battery are switched between a high-voltage charging input and a low-voltage charging input which are received from the direct-current charging seat. After the technical scheme is adopted, the hardware cost can be reduced, and the compatibility of different direct current charging piles is improved.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a charging circuit for an electric vehicle battery pack and an electric vehicle. Background technique [0002] With the rapid development of electric vehicles, the main problems that should be solved are the cruising range and charging speed of users. When the battery of an electric vehicle runs out, the user needs to charge it quickly to continue driving. [0003] The usual charging method is AC charging or DC charging. Due to the fast charging speed of DC charging, a large number of DC charging base stations have been built. For electric vehicles with a 400V power supply system that has been popularized at present, a relatively complete infrastructure has been built. Compared with the 400V DC bus, the electric vehicle with the 800V DC bus system has more advantages in power performance. Therefore, on the electric vehicle side, more and more 800V high-voltage busbar systems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00B60L58/10B60L58/18
CPCH02J7/0014H02J7/007182B60L58/10B60L58/18Y02T10/70
Inventor 沈捷李一粟
Owner LEADRIVE TECH (SHANGHAI) CO LTD