CN113611937A - Dynamically reconfigurable battery pack and charging method thereof - Google Patents

Dynamically reconfigurable battery pack and charging method thereof Download PDF

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Publication number
CN113611937A
CN113611937A CN202110951688.1A CN202110951688A CN113611937A CN 113611937 A CN113611937 A CN 113611937A CN 202110951688 A CN202110951688 A CN 202110951688A CN 113611937 A CN113611937 A CN 113611937A
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CN
China
Prior art keywords
battery
voltage
change rate
electric quantity
charging
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Application number
CN202110951688.1A
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Chinese (zh)
Inventor
李任欣
刘豪
邓云庆
邓青松
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Sichuan Zhongqing Xuanyu Technology Co ltd
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Sichuan Zhongqing Xuanyu Technology Co ltd
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Priority to CN202110951688.1A priority Critical patent/CN113611937A/en
Publication of CN113611937A publication Critical patent/CN113611937A/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a dynamically reconfigurable battery pack, which relates to the technical field of batteries and comprises a battery compartment, wherein a main control board and a battery pack circuit formed by connecting a plurality of batteries with voltage of D volts in series are arranged in the battery compartment, the main control board is provided with a voltage detection unit for detecting the voltage of each battery, a current detection unit for detecting the current of each battery and a calculation unit for calculating the voltage change rate, the electric quantity change rate and the electric quantity according to the voltage and the current of the batteries, each battery is coupled with a PWM (pulse-width modulation) regulation circuit for regulating the duty ratio according to the voltage change rate and the electric quantity change rate, the battery pack circuit consists of M normal battery circuit units and N standby battery circuit units, the charging voltage of the battery pack is D M, the PWM regulation circuit regulates the duty ratio according to the voltage change rate and the electric quantity change rate of the batteries and controls the charging duration of the batteries according to the duty ratio, effectively avoiding the overcharge of the battery.

Description

Dynamically reconfigurable battery pack and charging method thereof
Technical Field
The invention relates to the technical field of batteries, in particular to a dynamically reconfigurable battery pack and a charging method thereof.
Background
At present, in the freight transportation industry, electric vehicles gradually start to replace internal combustion engine transportation vehicles and are widely applied.
The electric motor car adopts the group battery as power, current group battery adopts multisection battery to establish ties to form, the battery charges simultaneously during charging, discharge simultaneously during discharging, but there is the difference between the single section battery when dispatching from the factory, cause some battery overcharge easily during charging, cause some battery to cross to put easily during discharging, this can reduce the life of battery, in addition, current group battery generally is formed by the packing of a plurality of single section batteries, go on through taking the holistic mode of change group battery when changing the battery, because group battery weight is at tens kilograms or even hundreds kilograms, need special place and special equipment just can carry out the change work of group battery, the use cost of electric motor car has been improved.
Disclosure of Invention
The invention aims to: the invention provides a battery pack capable of being dynamically reconfigured and a charging method thereof, aiming at solving the problem that the service life of single batteries in the existing battery pack is reduced due to simultaneous charging.
The invention specifically adopts the following technical scheme for realizing the purpose:
the utility model provides a group battery that can dynamic restructure, includes the battery compartment, be equipped with the group battery circuit that main control board and multisection voltage formed for the battery series connection of D volt in the battery compartment, be equipped with the voltage detection unit that detects every battery voltage, the current detection unit of every battery current and calculate the calculating unit of voltage change rate, electric quantity change rate and electric quantity according to battery voltage and electric current on the main control board, every section battery equal coupling connection has the PWM regulating circuit according to voltage change rate and electric quantity change rate adjustment duty cycle, the group battery circuit comprises M normal battery circuit unit and N section spare battery circuit unit, and the charging voltage of group battery is D M.
Further, N is more than or equal to 0.1M and less than or equal to 0.5M.
Further, corresponding every battery all is equipped with the slide rail in the battery compartment, and every battery corresponds the slide rail and is equipped with matched with slider.
A method of charging a dynamically reconfigurable battery pack, comprising the steps of:
(1) charging by using a charging power supply with voltage D × M, wherein the battery pack is connected with the positive electrode and the negative electrode of the charging power supply;
(2) the voltage detection unit detects the voltage of the battery, the current detection unit detects the current of the battery, the calculation unit calculates the voltage change rate, the electric quantity change rate and the electric quantity according to the voltage and the current of the detected battery, if the electric quantity is smaller than the rated capacity, the step (3) is carried out, and if the electric quantity is equal to the rated capacity, the step (5) is carried out;
(3) the PWM adjusting circuit adjusts the duty ratio according to the voltage change rate and the electric quantity change rate of the battery, controls the charging duration of the battery according to the duty ratio, and M batteries are charged at the same time, and the duty ratio corresponding to the battery with large voltage change rate and large electric quantity change rate is low;
(4) repeating the steps (2) and (3) every T seconds, namely reconstructing every T seconds;
(5) the charging is stopped.
The invention has the following beneficial effects:
(1) the battery is controlled to determine whether to charge according to the voltage change rate and the electric quantity change rate, so that the charging of the battery is more stable, the overcharging of the battery is avoided, N spare batteries are added, and the battery pack can still normally work when certain normal batteries fail, so that the battery pack has a good spare function;
(2) correspond every battery in the battery compartment and all be equipped with the slide rail, can manually take off the battery, carry out battery charging and change work, do not need special place and equipment to carry out battery change work, work efficiency is high, trades the electric cost reduction.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic of the present invention;
Detailed Description
Example 1
Referring to fig. 1 and 2, the present embodiment provides a dynamically reconfigurable battery pack, including a battery compartment, a main control board and a battery pack circuit formed by connecting a plurality of batteries with voltage of D volts in series are disposed in the battery compartment, the main control board is provided with a voltage detection unit for detecting voltage of each battery, a current detection unit for current of each battery, and a calculation unit for calculating voltage change rate, power change rate, and power according to the voltage and current of the battery, each battery is coupled with a PWM adjustment circuit for adjusting duty ratio according to the voltage change rate and the power change rate, the battery pack circuit is composed of 16 normal battery circuit units and 2 standby battery circuit units, and the charging voltage of the battery pack is 48 volts.
Example 2
Referring to fig. 1 and 2, the embodiment is further improved on the basis of embodiment 1, specifically, a slide rail is arranged in the battery compartment corresponding to each battery, and a slider matched with each battery is arranged in the slide rail corresponding to each battery.
Example 3
Referring to fig. 1 and 2, the present embodiment provides a method of charging a dynamically reconfigurable battery pack, including the steps of:
(1) charging by adopting a charging power supply with the voltage of 48V, wherein the battery pack is connected with the positive electrode and the negative electrode of the charging power supply;
(2) the voltage detection unit detects the voltage of the battery, the current detection unit detects the current of the battery, the calculation unit calculates the voltage change rate, the electric quantity change rate and the electric quantity according to the voltage and the current of the detected battery, if the electric quantity is smaller than the rated capacity, the step (3) is carried out, and if the electric quantity is equal to the rated capacity, the step (5) is carried out;
(3) the PWM adjusting circuit adjusts the duty ratio according to the voltage change rate and the electric quantity change rate of the battery, controls the charging duration of the battery according to the duty ratio, and 16 batteries are charged at the same time, and the duty ratio corresponding to the battery with large voltage change rate and large electric quantity change rate is low;
(4) repeating the steps (2) and (3) at intervals of 0.1 second, namely performing reconstruction at intervals of T seconds;
(5) the charging is stopped.

Claims (3)

1. The utility model provides a group battery that can reconsitute dynamically, its characterized in that, includes the battery compartment, be equipped with the group battery circuit that main control board and multisection voltage formed for the battery series connection of D volt in the battery compartment, be equipped with the voltage detection unit that detects every battery voltage, the current detection unit of every battery current and calculate the voltage change rate according to battery voltage and current, the calculating unit of electric quantity change rate and electric quantity on the main control board, every battery is equal coupling connection has the PWM regulating circuit who adjusts the duty cycle according to voltage change rate and electric quantity change rate, the group battery circuit comprises M normal battery circuit units and N section spare battery circuit units, and the charging voltage of group battery is D M.
2. The battery pack capable of being dynamically reconfigured according to claim 1, wherein a slide rail is provided in the battery compartment corresponding to each battery, and a slider is provided in each battery corresponding to the slide rail.
3. A method of charging a dynamically reconfigurable battery pack as claimed in claim 1, comprising the steps of:
(1) charging by using a charging power supply with voltage D × M, wherein the battery pack is connected with the positive electrode and the negative electrode of the charging power supply;
(2) the voltage detection unit detects the voltage of the battery, the current detection unit detects the current of the battery, the calculation unit calculates the voltage change rate, the electric quantity change rate and the electric quantity according to the voltage and the current of the detected battery, if the electric quantity is smaller than the rated capacity, the step (3) is carried out, and if the electric quantity is equal to the rated capacity, the step (5) is carried out;
(3) the PWM adjusting circuit adjusts the duty ratio according to the voltage change rate and the electric quantity change rate of the battery, controls the charging duration of the battery according to the duty ratio, and M batteries are charged at the same time;
(4) repeating steps (2) and (3) every T seconds;
(5) the charging is stopped.
CN202110951688.1A 2021-08-18 2021-08-18 Dynamically reconfigurable battery pack and charging method thereof Withdrawn CN113611937A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN202110951688.1A CN113611937A (en) 2021-08-18 2021-08-18 Dynamically reconfigurable battery pack and charging method thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113765199A (en) * 2021-11-10 2021-12-07 北京理工大学 Reconfigurable battery pack capacity utilization maximization control method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050212486A1 (en) * 2004-03-23 2005-09-29 Nissan Motor Co., Ltd. Capacity adjustment apparatus for battery pack and capacity adjustment method for battery pack
CN103441542A (en) * 2013-08-13 2013-12-11 天津谷泰科技有限公司 Lithium battery distributed charging equalization circuit and control method thereof
CN110752635A (en) * 2019-10-12 2020-02-04 山东大学 Online capacity monitoring and charging and discharging dual-state equalization circuit and method for series battery pack
CN212725463U (en) * 2020-08-31 2021-03-16 深圳市加力邦科技有限公司 Integrated battery pack

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050212486A1 (en) * 2004-03-23 2005-09-29 Nissan Motor Co., Ltd. Capacity adjustment apparatus for battery pack and capacity adjustment method for battery pack
CN103441542A (en) * 2013-08-13 2013-12-11 天津谷泰科技有限公司 Lithium battery distributed charging equalization circuit and control method thereof
CN110752635A (en) * 2019-10-12 2020-02-04 山东大学 Online capacity monitoring and charging and discharging dual-state equalization circuit and method for series battery pack
CN212725463U (en) * 2020-08-31 2021-03-16 深圳市加力邦科技有限公司 Integrated battery pack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113765199A (en) * 2021-11-10 2021-12-07 北京理工大学 Reconfigurable battery pack capacity utilization maximization control method

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Address after: 610000 1601, building 13, No. 599, middle section of Yizhou Avenue, high tech Zone, Chengdu, Sichuan

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