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Battery charging preheating device and system

A battery charging and preheating device technology, applied in secondary battery charging/discharging, secondary battery, secondary battery repair/maintenance, etc., can solve the problem of unstable current value, heat generation, slow lithium battery preheating speed, etc. problems, to achieve the effect of increasing the warm-up speed

Active Publication Date: 2019-05-07
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current value generated during the preheating of the lithium battery by the external power supply cannot be controlled and the current value is unstable, and the current generated by the external power supply includes a variety of frequencies, and there are many current frequencies that cannot generate heat for the lithium battery. As a result, the preheating process of the lithium battery cannot be controlled stably and accurately, and the preheating speed of the lithium battery is too slow

Method used

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  • Battery charging preheating device and system
  • Battery charging preheating device and system

Examples

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Embodiment 1

[0039] An embodiment of the present invention provides a battery charging preheating device, such as figure 1 As shown, the device includes: a transformation unit 10, a sampling unit 11, a control unit 12 and a drive unit 13;

[0040] The first input end and the second input end of the above-mentioned transformation unit 10 are respectively connected with the first output end of the DC power supply and the output end of the drive unit 13; the first output end and the second output end of the transformation unit 10 are respectively connected with the target battery The input end is connected with the first input end of the sampling unit 11; the second input end and the third input end of the sampling unit 11 are respectively connected with the second output end of the DC power supply and the output end of the target battery; the input end of the control unit 12 is connected with the output end of the target battery. The output end is respectively connected with the output end o...

Embodiment 2

[0047] The embodiment of the present invention also provides another battery charging preheating device, which is implemented on the basis of the first embodiment, as figure 2 As shown, the conversion unit 10 includes an inverter bridge 101, a transformer 102 and an LC resonant circuit 103 connected in sequence; the control unit 12 includes a control module 121, a protection module 122 and a status indicating module 123;

[0048] The above-mentioned transformer 102 can be a high-frequency transformer, and the ratio of the number of turns of the primary side to the number of turns of the secondary side is N:1. The transformer is connected to the primary side circuit and the secondary side circuit to play a role of safety isolation. The secondary side, and the primary side AC voltage pulse is converted to the secondary side voltage pulse according to the transformation ratio, which is used to generate resonance in the LC resonant circuit, and is used to convert the voltage value...

Embodiment 3

[0094] The embodiment of the present invention also provides a battery charging preheating system, such as Figure 13 As shown, the system includes the battery charging and preheating device 20 in Embodiment 1 or Embodiment 2, and also includes a DC power supply 21 connected to the battery charging and preheating device 20 .

[0095]The embodiment of the present invention provides a battery charging preheating device and system, the device includes: a conversion unit, a sampling unit, a control unit and a drive unit; the first input end and the second input end of the conversion unit are respectively connected to the output connected to the output end of the driving unit; the first output end and the second output end of the conversion unit are respectively connected to the input end of the target battery and the first input end of the sampling unit; the second input end of the sampling unit is connected to the output of the target battery The input terminal and the output ter...

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Abstract

The invention provides a battery charging preheating device and system. The device comprises a conversion unit, a sampling unit, a control unit and a driving unit; the sampling unit collects a currentvalue and a temperature value of a target battery, and transmits the current value and temperature value of the target battery to the control unit; the control unit determines a current control signal according to the current value and temperature value of the target battery, and transmits the current control signal to the driving unit, so that the driving unit generates a driving signal according to the current control signal and transmits the driving signal to a transformation unit; and the transformation unit receives DC provided by the DC power supply, and converts the DC into target AC according to the driving signal, and transmits the target AC to a target battery so as to preheat the target battery. The preheating current of the target battery is controlled accurately and stably, and the preheating speed of the target battery is improved.

Description

technical field [0001] The invention relates to the technical field of power battery heating, in particular to a battery charging preheating device and system. Background technique [0002] It is understood that in the past 10 years, about 86% of the global electric vehicles will use lithium-ion batteries as power supply. Lithium batteries are the core power batteries of electric vehicles. Compared with well-developed lead-acid batteries, lithium-ion batteries have higher energy storage per unit weight, are not expensive, and are basically non-toxic. Therefore, current new energy vehicles generally tend to use lithium iron phosphate and lithium manganese oxide batteries. In a cold environment, in order to obtain better working performance, the lithium battery needs to be warmed up before charging. [0003] In the prior art, an external power source is used to preheat the lithium battery, so that the temperature of the lithium battery rises to room temperature or above 10°C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/615H01M10/625H01M10/637H01M10/44
CPCY02E60/10
Inventor 时玮郝瑞祥袁素红张之夏张玉洁
Owner BEIJING JIAOTONG UNIV
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