A battery management system and circuit for charging and discharging a battery pack

A battery management system, battery pack technology, applied in battery circuit devices, different battery charging, circuit devices, etc., can solve problems such as low charging and discharging efficiency, and achieve the effect of improving charging and discharging efficiency, and taking into account both safety and efficiency.

Pending Publication Date: 2019-01-18
ZTE CORP
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of low charging and discharging efficiency existing in the related art when the charging of the rechargeable battery i

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A battery management system and circuit for charging and discharging a battery pack
  • A battery management system and circuit for charging and discharging a battery pack
  • A battery management system and circuit for charging and discharging a battery pack

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0059] Example 1: Battery management system BMS and charging and discharging circuit

[0060] image 3 It is a charging and discharging circuit for battery pack according to an embodiment of the present invention Figure three .

[0061] Such as image 3 As shown, the current-limiting module U3 is connected in parallel at both ends of the main loop switch S1 to form a switch part, and the switch is controlled by the BMS processor. This switch part is connected in series with the battery pack U1 and the power supply Y1 to form a battery charging circuit; when the power supply Y1 is powered off, the switch part is connected in series with the battery pack and the load RL to form a battery discharge circuit. The battery management system (BMS) is used to detect and sample voltage, current, temperature, etc., and to control and manage the safe and reliable operation of the lithium battery pack. It mainly includes but not limited to the following parts (in the dashed box): BMS processo...

Example Embodiment

[0075] Example two, using the circuit in example one to charge and discharge the battery pack.

[0076] Step 1: Before the battery charging starts, the BMS processor U2 calculates and judges whether the system has a fault or protection alarm;

[0077] If not, first close the main discharge switch S2 and connect the main discharge circuit to ensure the ability to discharge at any time. Step 2: The BMS detects the power supply voltage Uy in real time through the voltage detection module D2, and the voltage detection module D1 detects the battery pack voltage Ub in real time;

[0078] Step 3: The BMS processor U2 controls the charging mode by calculating the voltage difference ΔV between Uy and Ub and the agreed threshold U0.

[0079] (1) If the voltage difference △V between Uy and Ub (△V=Uy-Ub) is greater than the agreed threshold U0, that is, △V>U0, there is a risk of charging overcurrent if the voltage difference is too large. At this time, the BMS processor U2 controls the switch S1 ...

Example Embodiment

[0085] Example 3: Power supply Y1 and load RL are used to describe the application scenario of the present invention. The battery pack is used as a backup power supply to supply power to the load RL when the power supply Y1 is off. The BMS processor is the battery management system BMS control and management The main circuit switch is connected in parallel with the current-limiting module, and the switch state is controlled by the BMS processor. The method provided in Example 3 may include the following steps:

[0086] Step 1: Set the pressure difference threshold U0 and the current protection threshold Imax parameter size in the BMS;

[0087] Step 2: After the BMS processor U2 is powered on and initialized, the system protection mechanism and failure are detected;

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The embodiment of the invention discloses a battery management system and a circuit for charging and discharging a battery pack. The circuit may include at least one voltage detection module D, a battery management system BMS processor, a current limiting module U3, a current detection module I, and at least one switch S1. The current limiting module U3 is connected in parallel with the switch S1,and is connected in series with the current detecting module I after being connected in parallel; A voltage detection module D, configured to detect a voltage value of the power supply Y1 and the charging battery pack U1; A current detection module I, configured to detect the current value of the loop in which the current detection module I is located; BMS processor, D for control that voltage detection module, Current limiting module U3, The current detection module I and the switch S1 can solve the problem of low charging and discharging efficiency under the condition that the charging of the rechargeable battery does not exceed the current in the related art, realize the improvement of the charging and discharging efficiency of the rechargeable battery under the condition that the charging of the rechargeable battery does not exceed the current, and achieve the beneficial effect that both the safety and the efficiency of the rechargeable battery are taken into account.

Description

technical field [0001] The invention relates to the technical field of battery charging, in particular to a battery management system and a circuit for charging and discharging a battery pack. Background technique [0002] Lithium-ion batteries are prone to overcurrent during the charging process and cause safety problems. Ensuring charging safety has always been one of the important difficulties that the battery management system (BMS) needs to overcome. The current technical solution is to connect the current limiting module in series in the charging and discharging main circuit, and the current limiting works all the time during the charging and discharging process. Although this solution solves the over-current problem, the power consumption of the current-limiting module is large, the charging and discharging efficiency is very low, and it cannot be applied in fields that require high-current fast charging and fast discharging. Under the condition that the charging of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02J7/00H02J9/06
CPCH02J7/0036H02J7/0047H02J9/061H02J7/00304H02J7/0071
Inventor 姜欢杨锐李杨张绍敏
Owner ZTE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap