CN110838737A - Charge-discharge control method and charge-discharge control device for retired power battery pack - Google Patents
Charge-discharge control method and charge-discharge control device for retired power battery pack Download PDFInfo
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- CN110838737A CN110838737A CN201810929771.7A CN201810929771A CN110838737A CN 110838737 A CN110838737 A CN 110838737A CN 201810929771 A CN201810929771 A CN 201810929771A CN 110838737 A CN110838737 A CN 110838737A
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- power battery
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- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- 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
Abstract
The invention belongs to the technical field of electrochemical energy storage, and provides a charging and discharging control method and a charging and discharging control device for a retired power battery pack; the retired power battery pack comprises more than two retired power battery packs, and the charge and discharge control method comprises the following steps: collecting the operating parameters of each retired power battery pack; classifying and summarizing the operating parameters of the retired power battery pack to obtain battery information of the retired power battery pack; performing power-on and power-on time sequence control on the retired power battery pack according to the battery information; after the retired power battery pack is powered on and started up, respectively performing discharge time sequence control and charge time sequence control on the retired power battery pack according to battery information so as to realize balanced discharge and charge processes of the retired power battery pack; therefore, the problem that the ex-service power battery pack cannot be recycled due to the fact that the charging process and the discharging process of the ex-service power battery pack cannot be controlled in the traditional technology is effectively solved through the method and the device.
Description
Technical Field
The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a charging and discharging control method and a charging and discharging control device for a retired power battery pack.
Background
With the enhancement of environmental protection awareness of people, renewable energy products are widely popularized and applied, taking an electric automobile as an example, the electric automobile needs to consume a large amount of electric energy in the operation process, however, the energy storage capacity and the service life of the electric automobile are limited, and after the electric automobile runs for a long time, a power battery in the electric automobile gradually loses the energy storage capacity due to long-time charging and discharging processes, so that a user needs to regularly replace the power battery in the electric automobile, and people can generate numerous retired power battery packs in the process of using the electric automobile; considering that the manufacturing materials of the retired power battery pack comprise heavy metal and other pollution materials, if the retired power battery pack is directly discarded, the retired power battery pack not only causes great pollution to the natural environment, but also causes excessive waste of industrial materials, and increases the application cost of renewable energy products.
After long-time use, the retired power battery pack not only greatly reduces the effect of storing electric energy, but also has larger unpredictability and variability in the power of the output electric energy, thereby causing great impact on the reliability of a power system; the traditional technology cannot control the charging process and the discharging process of the retired power battery pack, so that the retired power battery pack is difficult to realize a high-power electric energy storage process, and the retired power battery pack is difficult to be applied to industrial products again; therefore, the retired power battery pack in the traditional technology cannot be recycled, and a large number of retired power battery packs are directly discarded, so that the application cost of the power battery pack is greatly increased, and the environment is seriously polluted.
Disclosure of Invention
The invention provides a charging and discharging control method of a retired power battery pack and a charging and discharging control device of the retired power battery pack, and aims to solve the problem that the charging and discharging processes of the retired power battery pack cannot be controlled by the traditional technology, so that the retired power battery pack cannot be recycled, and the industrial application cost of the power battery pack is increased.
The invention provides a charge and discharge control method of a retired power battery pack, wherein the retired power battery pack comprises more than two retired power battery packs, and the charge and discharge control method comprises the following steps:
step S101: collecting the operating parameters of each retired power battery pack;
step S102: classifying and summarizing the operating parameters of the retired power battery pack to obtain battery information of the retired power battery pack;
step S103: performing power-on and power-on time sequence control on the retired power battery pack according to the battery information, and after the retired power battery pack is powered on and powered on, executing step S104 or step S105;
step S104: performing discharge time sequence control on the retired power battery pack according to the battery information, and after the retired power battery pack finishes discharging, executing step S105;
step S105: and performing charging time sequence control on the retired power battery pack according to the battery information, and after the retired power battery pack is charged, returning to the step S104.
The second aspect of the present invention provides a charge and discharge control device for a decommissioned power battery pack, where the decommissioned power battery pack includes M decommissioned power battery packs, where M is a positive integer greater than or equal to 2, and the charge and discharge control device includes:
the battery management units are connected with the retired power battery packs in a one-to-one correspondence mode and used for acquiring the operating parameters of the retired power battery packs;
the M communication management units are connected with the battery management units in a one-to-one corresponding mode and used for transmitting the operation parameters;
the control unit is connected with the M communication management units and is used for classifying and summarizing the operating parameters of the retired power battery pack to obtain a control signal of the retired power battery pack;
and the energy storage converter is connected between the control unit and an external power grid and is used for carrying out power-on and power-on time sequence control, discharge time sequence control and charging time sequence control on the retired power battery pack according to the control signal.
In the charge-discharge control method of the retired power battery pack, the retired power battery pack comprises a plurality of retired power battery packs, the operation parameters of the retired power battery packs are classified and gathered to obtain the battery information of the retired power battery pack, and the operation state of each retired power battery pack can be obtained through the battery information so as to perform self-adaptive control of charge and discharge on the retired power battery pack; performing power-on and power-on time sequence control on the retired power battery pack according to the battery information, wherein after the retired power battery pack finishes power-on and power-on, the retired power battery pack finishes preparation work before charging/discharging; further, the retired power battery pack is enabled to enter a discharging state and a charging state according to the operation instruction, and the retired power battery pack can be switched between the discharging state and the charging state in order according to the operation instruction, so that the retired power battery pack can be discharged and charged in a circulating and balanced mode, and the retired power battery pack can store and release high-power electric energy again in the charging process and the discharging process; therefore, the invention can carry out balanced discharge control and balanced charge control on the retired power battery pack, so that the retired power battery pack can be recycled, the utilization rate of renewable energy sources is enhanced, and the industrial application cost of the power battery pack is saved; the problems that the charging process and the discharging process of the retired power battery pack cannot be controlled by the traditional technology, the retired power battery pack cannot be recycled, and the manufacturing cost of the power battery pack is high are effectively solved.
Drawings
Fig. 1 is a flowchart illustrating an implementation of a charging and discharging control method for a retired power battery pack according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an implementation of power-on timing control for a retired power battery pack according to battery information according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an implementation of discharge timing control for a retired power battery pack according to battery information according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating an implementation of a charging sequence control for a retired power battery pack according to battery information according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a specific implementation of charging protection for a retired power battery pack during a charging process for an online retired power battery pack according to an embodiment of the present invention;
fig. 6 is a flowchart of a specific implementation of performing discharge protection on a decommissioned power battery pack during a discharge process of an online decommissioned power battery pack according to an embodiment of the present invention;
fig. 7 is a block diagram of a charge/discharge control device for a retired power battery pack according to an embodiment of the present invention.
Detailed Description
It should be noted that, according to the principle of battery energy storage and discharge in the conventional technology, the power battery pack mainly uses the chemical fuel inside to realize the functions of charging and discharging, and in the conventional technology, the power battery is divided into: the retired power battery comprises all different types of power batteries in the technical field; when the power battery is charged or discharged for a long time, chemical fuel (such as hydrocarbon or ethanol) inside the power battery realizes mutual conversion between chemical energy and electric energy through oxidation-reduction reaction under the action of a catalyst; in the initial stage, because the chemical fuel concentration in the power battery is higher, the oxidation-reduction reaction rate can be directly controlled by an external power system; however, with the continuous consumption of the chemical fuel in the power battery, the oxidation-reduction reaction of the chemical fuel gradually becomes uncontrollable, and then the energy storage effect and the discharge effect of the power battery are reduced, and the power battery is in the retirement period, that is, the retired power battery pack.
Therefore, the chemical fuel concentration inside the retired power battery pack is low, and it is difficult to control the discharging process and the charging process of the retired power battery pack through an external power system, and if the retired power battery pack is to be recycled again, the charging and discharging process of the retired power battery pack must be controllable; in order to solve the above problems, embodiments of the present invention provide a charge and discharge control method for a retired power battery pack, which can perform balanced charge control and discharge control on the retired power battery pack; specifically, fig. 1 shows an implementation process of the charge and discharge control method provided in an embodiment of the present invention, where a retired power battery pack includes N retired power battery packs, where different retired power battery packs are connected in parallel, and for convenience of description, only a part related to the embodiment of the present invention is shown, and as shown in fig. 1, the charge and discharge control method includes the following steps:
step S101: collecting the operating parameters of each retired power battery pack; because the operation conditions of each retired power battery pack can be different, for example, in the retired power battery pack, the remaining service life of the retired power battery pack A is 100 hours, and the remaining service life of the retired power battery pack B is 50 hours, the actual operation condition of each retired power battery pack can be obtained through the operation parameters, so that accurate and self-adaptive control over the retired power battery packs is realized; optionally, the operation parameters of the retired power battery pack are acquired one by one through a signal acquisition unit or a signal acquisition signal in the conventional technology.
Step S102: classifying and summarizing the operating parameters of the retired power battery pack to obtain battery information of the retired power battery pack; the retired power battery pack comprises N retired power battery packs, optionally, in order to comprehensively obtain the overall operation condition of the retired power battery pack, the operation parameters of the N retired power battery packs are classified and collected according to attributes and categories to obtain battery information, and the battery information comprises the operation states of the N retired power battery packs, and can be obtained through the battery information: whether each retired power battery pack is in a fault state or the residual electric quantity of each retired power battery pack and the like; therefore, in step S102, the battery information of the retired power battery pack is obtained by classifying, summarizing and analyzing the plurality of operating parameters, and the operating state of the retired power battery pack can be comprehensively and deeply known through the battery information, so that each retired power battery pack can be in the optimal operating state.
As an optional real-time manner, in step S102, a single chip microcomputer in the conventional technology is used to implement the classification and summarization of the operation parameters; the skilled person can also implement the parameter sorting and summarizing function by using a data integrated circuit in the conventional technology, which is not limited in this respect.
Step S103: performing power-on and power-on time sequence control on the retired power battery pack according to the battery information so as to wait for executing the step S104 and the step S105; it should be noted that the time sequence refers to the sequence of the control signal completing the set action; in the initial stage, the retired power battery pack cannot be directly charged or discharged, but needs to be activated through an awakening stage, namely power-on and power-on time sequence control, to the internal circuit in the retired power battery pack; in the power-on and power-on time sequence control, the internal circuit of the retired power battery pack receives electrical stimulation to enter a working state, so that the retired power battery pack can be charged or discharged only after the power-on and power-on time sequence control is carried out on the retired power battery pack, which is equivalent to the preparation work before the retired power battery pack finishes charging/discharging; after the retired power battery pack is powered on and started, step S104 is executed according to the discharging operation instruction, or step S105 is executed according to the charging operation instruction.
Step S104: performing discharge time sequence control on the retired power battery pack according to the battery information; the running state of each retired power battery pack in the retired power battery pack can be obtained through the battery information, so that in step S104, the retired power battery pack can perform a discharging operation according to the actual running condition of each retired power battery pack, and at this time, the retired power battery pack can continuously output stable electric energy outwards to drive an external electronic circuit to execute actions; after the retired power battery pack finishes discharging, in step S105 to be executed, since the retired power battery pack already outputs a large amount of electric energy, a charging operation command is waited for, and if the retired power battery pack receives the charging operation command, the next step S105 is immediately executed.
Step S105: performing charging time sequence control on the retired power battery pack according to the battery information; according to the actual operation condition of each retired power battery pack, the retired power battery pack completes charging operation, and then the retired power battery pack can access external energy to realize electric energy storage; therefore, in step S105, stable electric energy can be transmitted to the retired power battery pack by performing charging sequence control on the retired power battery pack, so as to implement the own electric energy storage process of the retired power battery; after the retired power battery pack finishes charging, the retired power battery pack returns to the step S104 to wait for the discharging operation instruction because the retired power battery pack finishes the electric energy storage process, and if the retired power battery pack receives the discharging operation instruction, the retired power battery pack returns to the step S104 according to the discharging operation instruction to circularly execute the discharging operation, so that a user can control the retired power battery pack to circularly execute the discharging operation and the charging operation at any time, and the practicability of the retired power battery pack is greatly improved.
By combining the steps of the charge and discharge control method, after the retired power battery pack is powered on and started, the retired power battery pack can be charged after being discharged according to the discharge operation instruction, and can also be charged before being discharged according to the charge operation instruction; in step S104, the retired power battery pack can stably output stable electric energy to the outside by performing discharge timing control on the retired power battery pack, and after the retired power battery pack finishes discharging, a user can select whether to perform charging operation on the retired power battery pack; if the retired power battery pack receives the charging operation instruction, immediately executing the step S105 to realize the charging operation of the retired power battery pack; in step S105, performing charging sequence control through the retired power battery pack, so that the retired power battery pack can access stable electric energy to realize energy storage operation of the retired power battery pack, and after the retired power battery pack finishes charging, waiting for a discharging operation instruction by the retired power battery pack; if the retired power battery pack receives the discharging operation instruction, returning to the step S104 immediately to realize the discharging operation of the retired power battery pack; therefore, in the charge and discharge control method according to the embodiment of the present invention, step S104 and step S105 can be executed cyclically according to the operation instruction, and the user can sequentially switch the retired power battery pack between the discharge operation and the charge operation to effectively control the charge and discharge of the retired power battery pack, and the retired power battery pack can realize discharge and self energy storage when being applied to an electronic circuit, so that the retired power battery according to the embodiment of the present invention can be reapplied to an industrial product, thereby bringing a good experience to the user.
Optionally, the discharging operation instruction and the charging operation instruction are both generated by a single chip microcomputer in the conventional technology; it should be noted that N is a positive integer greater than or equal to 2, and a person skilled in the art may set the number of the retired power battery packs according to actual needs, for example, N is 15 or N is 16, and then the charging or discharging process is simultaneously implemented on a plurality of retired power battery packs by using the above charging and discharging control method.
In the embodiment of the invention, the retired power battery pack is subjected to charge and discharge control according to the actual operation condition of the retired power battery pack, so that each retired power battery pack can be in the optimal working state, and the charge and discharge efficiency of the retired power battery pack is greatly improved; after the retired power battery pack is powered on and started, the retired power battery pack can be subjected to power-on starting time sequence control and can also be subjected to discharging starting time sequence control, and therefore the discharging process or the charging process of the retired power battery pack is achieved; in the charge and discharge control method, the retired power battery pack can circularly execute a discharging step or a charging step according to an operation instruction (including a charging operation instruction and a discharging operation instruction), and then a user can control the discharging process and the charging process of the retired power battery pack according to actual needs in the embodiment of the invention, a plurality of retired power battery packs can realize a balanced discharging process and a balanced charging process, the retired power battery packs in the invention can be directly applied to industrial products again without disassembly and reassembly, the industrial application cost of renewable energy sources is greatly saved, and the applicability universality of the power battery is improved; therefore, the problems that the charging process and the discharging process of the retired power battery pack cannot be controlled by the traditional technology, the retired power battery pack cannot be recycled, and the industrial application cost of the power battery pack is high are effectively solved.
Optionally, in step S101, the operation parameters of the retired power battery pack include: the single voltage, the current, the temperature and the SOC are further processed and analyzed through the operation parameters, and the actual operation condition of each retired power battery pack can be accurately obtained.
The SOC is used for reflecting the remaining capacity of the retired power battery pack, and the larger the value of the SOC is, the larger the remaining capacity of the retired power battery pack is; for example, when the SOC is 0, it indicates that the retired power battery pack has no remaining power, and the retired power battery pack has been completely discharged; when the SOC is 1, the retired power battery pack is full of electric energy; therefore, the electric energy storage condition in each retired power battery pack can be obtained through the size of the SOC, and the balanced charging and discharging process of the retired power battery packs is achieved.
Optionally, fig. 2 shows specific steps of performing power-on and power-on timing control on the retired power battery pack according to the battery information in step S103 according to the embodiment of the present invention, where the specific steps are as follows:
step S301: sending a disconnection instruction to each retired power battery pack, wherein the disconnection instruction is used for disconnecting a contactor in each retired power battery pack; it should be noted that, according to the internal circuit structure of the power battery pack in the conventional technology, the power battery pack includes a charging circuit, a discharging circuit, a controller, a contactor, and the like, where the contactor is used as a switch unit of the power battery pack, and only when the contactor inside the power battery pack is closed, the power battery pack can be charged or discharged; if the contactor in the power battery pack is disconnected, the charging circuit and the discharging circuit in the power battery pack are both in a disconnected state, and the power battery pack cannot realize the charging process and the discharging process; if the charging process or the discharging process can be realized through the contactors, that is, the controllable braking force battery packs, or not, in step S301, the contactors inside all the retired power battery packs are disconnected through the disconnection instruction, so that interference of external power signals on power-on and power-off timing control in the embodiment of the present invention is avoided, and it is ensured that the retired power battery packs can be normally subjected to power-on and power-off timing control.
Step S302: determining a retired power battery pack with the lowest monomer voltage in the retired power battery pack according to the battery information, wherein Amin represents the retired power battery pack with the lowest monomer voltage in the retired power battery pack; the actual operation condition of each retired power battery pack can be obtained through battery information, the Amin is selected from the retired power battery pack, the monomer voltage of the Amin is lowest, the Amin is in a normal operation state, namely, no physical fault occurs in the Amin, and the actual charging capacity and the actual discharging capacity of the retired power battery pack can be integrally reflected through the Amin.
Step S303: and outputting a closing instruction to the Amin, wherein the closing instruction is used for closing a contactor in the Amin, and the retired power battery pack finishes power-on and power-on. With reference to steps S301 to S303, since in step S301, all contactors inside the retired power battery pack are already disconnected, in step S303, the contactor inside the power battery pack with the lowest cell voltage in the retired power battery pack is closed, and at this time, the charging circuit and the discharging circuit inside the Amin are already connected, so that the next charging operation or discharging operation can be performed on the Amin, the retired power battery pack has already completed the power-on process, and the retired power battery pack can exchange electric energy with an external power system, so as to further realize the charging process and the discharging process; optionally, in step S301 and step S303, the opening instruction and the closing instruction are both generated by a CPU (central processing Unit), and of course, a person skilled in the art may also use a logic control circuit and the like in the conventional technology to generate the opening instruction and the closing instruction.
Optionally, fig. 3 shows a specific step of performing discharge timing control on the retired power battery pack according to the battery information in step S104, which is provided by the embodiment of the present invention, and is as follows:
step S401: obtaining a first battery pressure difference of an offline retired power battery according to the battery information, wherein a calculation formula of the first battery pressure difference is as follows:
in the above formula (1), U1 is the first battery voltage difference, U2 is the cell voltage of the offline decommissioned power battery pack, and U3 is the cell voltage of the online decommissioned power battery pack, where the offline decommissioned power battery pack refers to: the retired power battery pack with the internal contactor disconnected; the online retired power battery pack is characterized in that: the retired power battery pack with the closed internal contactor; by combining the technical contents, only when the contactor in the power battery pack is closed, the power battery pack can be charged or discharged, and then the online battery pack in the retired power battery pack can be directly discharged to output stable electric energy; the monomer voltage difference amplitude between the offline retired power battery pack and the online retired power battery pack can be obtained through the first battery voltage difference, and therefore fluctuation and residual situations of electric energy in the plurality of retired power battery packs can be identified, and the retired battery pack can output electric energy with appropriate power; in addition, the online battery pack includes: and all the online retired power battery packs in the retired power battery pack.
Step S402: when the first battery differential pressure is smaller than the preset differential pressure upper limit, sending a closing instruction to the offline retired power battery pack; the closing instruction is used for closing a contactor in the offline retired power battery pack; the upper limit of the preset differential pressure is a preset parameter; if the single voltage difference value (namely the first battery voltage difference) between the offline retired power battery pack and the online retired power battery pack is smaller than the preset voltage difference upper limit, the offline retired power battery pack meets the closing condition of the contactor, and the contactor in the offline retired power battery pack is closed through a closing instruction at the moment, so that the offline retired power battery pack is changed into the online state from the offline state, the discharge efficiency of the retired power battery pack is improved, and the number of the online retired power battery packs in the retired power battery pack is updated in real time; on the contrary, if the first battery differential pressure is greater than or equal to the preset differential pressure upper limit, it is indicated that the fluctuation amplitude of the cell voltage of the offline retired power battery pack is too large, if the contactor inside the offline retired power battery pack is closed, the operation safety of the retired power battery pack will be seriously damaged, at this time, in order to protect the discharge safety of the retired power battery pack, the offline retired power battery pack cannot enter the discharge process, only the online retired power battery pack can perform the discharge operation, and then the safety of the retired power battery pack in the discharge process is greatly protected through the step S402.
It should be noted that the preset upper limit of the differential pressure is preset according to the actual parameters of the retired power battery pack; specifically, when a specific magnitude of the preset upper pressure difference limit is set, the actual parameters of the retired power battery include, but are not limited to: service life, manufacturing materials and residual capacity of the retired power battery.
Step S403: discharging all online retired power battery packs in the retired power battery pack; after the above step S402, all the online retired power battery packs in the retired power battery pack satisfy the discharging condition, so in step S403, all the online retired power battery packs can continuously output stable electric energy to the external power system, so as to implement the discharging process of the retired power battery pack.
Step S404: determining a third retired power battery pack according to the battery information, wherein the third retired power battery pack is a retired power battery pack with the minimum voltage of the single battery in the online battery pack; because the cell voltage in the third retired power battery pack is the minimum, the minimum residual electric quantity and the weakest discharge capacity in the third retired power battery pack are shown, and then whether the retired power battery pack meets the condition of continuous safe discharge at the moment can be judged according to the third retired power battery pack.
Step S405: when the voltage of the single battery of the third retired power battery pack is smaller than a first preset cut-off voltage, comparing the pole difference of the SOC in the online battery pack with the preset SOC difference value; if the pole difference is smaller than the preset SOC difference value, executing step S406; if the pole difference is greater than or equal to the preset SOC difference value, executing step S407; wherein the first preset cut-off voltage is a preset parameter; the SOC is the ratio of the residual capacity of the retired power battery pack to the battery capacity of the retired power battery pack, and the value range of the SOC is 0-100%; the preset SOC difference value is a preset parameter; it should be noted that the first preset cut-off voltage is the minimum cell voltage of the power battery pack in the normal working process, and when the cell voltage in the power battery pack is smaller than the first preset cut-off voltage, it indicates that the electric energy in the power battery pack is insufficient, and at this time, the power battery pack does not meet the condition of continuing to discharge; therefore, in step S405, if the cell voltage of the third retired power battery pack is smaller than the first preset cut-off voltage, it may be determined that the internal power of the third retired power battery pack is insufficient and the third retired power battery pack cannot continue to discharge.
Meanwhile, in step S405, the residual electric quantity in the online retired power battery pack can be obtained according to the SOC; therefore, the balance condition of the electric quantity in the online battery pack can be obtained through the pole difference of the SOC in the online battery pack, wherein the pole difference refers to the difference between the maximum value of the SOC and the minimum value of the SOC in the online retired power battery pack; the preset SOC difference value is used for reflecting the maximum upper limit of the electric quantity difference value in the online retired power battery pack; specifically, if the pole difference of the SOC in the online battery pack is smaller than the preset SOC difference value, it is indicated that the electric energy of each online retired power battery pack in the online battery pack is balanced, and the retired power battery pack is in a safe discharge state, and step S406 is executed; on the contrary, if the pole difference of the SOC in the online battery pack is greater than or equal to the preset SOC difference value, the fluctuation range of the electric energy of each online retired power battery pack in the online battery pack is too large, the electric energy of each online retired power battery pack in the online battery pack is extremely unbalanced, and the retired power battery pack is in an extremely unsafe operating state, and step S407 is executed.
The specific size of the first preset cut-off voltage and the specific size of the preset SOC difference value may be preset according to the actual operation condition of the retired power battery pack, for example, when the first preset cut-off voltage and the preset SOC difference value are set, the rated voltage, the rated power, and the like of the retired power battery pack need to be considered.
Therefore, in step S405, the power balance condition of the online retired power battery pack in the retired power battery pack can be distinguished according to the extreme difference of the SOC in the online battery pack, and when the power of each online retired power battery pack in the online battery pack is balanced or unbalanced, different processing steps are respectively performed on the retired power battery pack, so that the retired power battery pack can perform safe and efficient discharge operation.
Step S406: finishing discharging the retired power battery pack; the electric energy in the third retired power battery pack is too low, the third retired power battery pack does not meet the condition of continuous discharging, the pole difference of the SOC in the online battery pack is smaller than the preset SOC difference value, the electric energy in the online battery pack meets the electric energy balancing condition, the retired power battery pack achieves the safe discharging process, and the retired power battery pack waits for a charging operation instruction to determine whether to perform charging operation or not, so that the smooth switching between discharging and charging is achieved.
Step S407: disconnecting the internal contactor of the third retired power battery pack, and returning to the step S403; because the cell voltage in the third decommissioned power battery pack is already smaller than the first preset cut-off voltage, the third decommissioned power battery pack no longer meets the continuous discharging condition, and therefore the internal contactor of the third decommissioned power battery pack is disconnected, and the third decommissioned power battery pack enters a discharging prohibition mode; however, at this time, the electric energy in the online battery pack is still in an unbalanced state, and the physical safety of the retired power battery pack will be seriously damaged by the unbalanced electric energy, and at this time, the step S403 is returned to continue discharging other online retired power battery packs in the retired power battery pack, so that damage to the retired power battery packs caused by the unbalanced electric energy generated in the discharging process of the online battery pack is avoided.
As an alternative implementation manner, fig. 4 shows a specific step of performing charge timing control on the retired power battery pack according to the battery information in step S105, which is provided by an embodiment of the present invention, and is as follows:
step S501: obtaining a second battery pressure difference of the offline retired power battery pack according to the battery information, wherein a calculation formula of the second battery pressure difference is as follows:
in the above formula, the U4 is the second battery voltage difference, the U5 is the cell voltage of the offline decommissioned power battery pack, and the U6 is the cell voltage of the online decommissioned power battery pack, where the offline decommissioned power battery pack refers to: the retired power battery pack with the disconnected internal contactor is characterized in that: the retired power battery pack with the closed internal contactor; referring to the embodiment of the step S401, in step S501, the difference amplitude of the cell voltages between the offline retired power battery pack and the online retired power battery pack can be obtained through the second battery voltage difference, and appropriate electric energy is transmitted to the retired power battery pack according to the actual operation condition of the online retired power battery pack in the online battery pack, so as to implement the equalizing charging process of the retired power battery pack; wherein the online battery pack includes: and all online retired power battery packs in the retired power battery pack.
Step S502: when the second battery pressure difference is smaller than the preset pressure difference upper limit, a closing instruction is sent to the offline retired power battery pack; the closing instruction is used for closing a contactor inside the offline retired power battery pack; presetting the upper limit of the pressure difference as a preset parameter; referring to the embodiment of step S402, the maximum voltage difference allowed when the contactors of different retired power battery packs in the retired power battery pack are closed can be measured by the preset upper limit of the voltage difference, so that when the second battery voltage difference is smaller than the preset upper limit of the voltage difference, the offline retired power battery pack meets the closing condition, and thus the offline retired power battery pack is changed from the offline state to the online state to be added to the charging process of the retired power battery pack, so as to update the number of the online retired power battery packs in the online battery pack; therefore, the charging safety and the charging efficiency of the retired power battery pack can be fully guaranteed through the step S502.
Step S503: charging all online retired power battery packs in the retired power battery pack; since the charging circuit in the online retired power battery pack is already closed and the retired power battery pack has already completed the preparation work before charging, in step S503, the online retired power battery pack may continuously access stable power from the external power system to achieve the charging operation.
Step S504: judging to obtain a sixth retired power battery pack according to the battery information; the sixth retired power battery pack is a retired power battery pack with the largest single voltage in the online battery pack; when the online retired power battery pack in the retired power battery pack is connected with electric energy, the electric energy of the online retired power battery pack continuously rises, and at the moment, the residual electric energy in the sixth retired power battery pack is the largest, so that whether the retired power battery pack meets the condition of continuously and safely charging or not can be accurately judged through the sixth retired power battery pack.
Step S505: when the monomer voltage of the sixth retired power battery pack is larger than the second preset cut-off voltage, comparing the pole difference of the SOC in the online battery pack with the preset SOC difference value; if the pole difference is smaller than the preset SOC difference value, executing step S506; if the pole difference is greater than or equal to the preset SOC difference value, executing step S507; the second preset cut-off voltage is a preset parameter; the SOC is the ratio of the residual capacity of the retired power battery pack to the battery capacity of the retired power battery pack, the value range of the SOC is 0% -100%, and the difference value of the preset SOC is a preset parameter; it should be noted that the second preset cut-off voltage refers to: the maximum cell voltage of the retired power battery pack in the normal working process indicates that the residual internal electric energy in the retired power battery pack is too large when the cell voltage of the retired power battery pack is greater than the second preset cut-off voltage, and exceeds the upper limit of the electric energy for safe and stable operation of the retired power battery pack, and at this time, the retired power battery pack does not meet the condition for continuous charging.
Regarding the specific meaning of the SOC and the related content of the preset SOC difference value, those skilled in the art may refer to the embodiment of step S405, which will not be described herein again, and may determine whether the electric energy in the online retired power battery pack is balanced or not through the magnitude relationship between the polar difference of the SOC in the online battery pack and the preset SOC difference value, and when the electric energy in the online battery pack is in a balanced or unbalanced state, perform different charging steps on the retired power battery pack respectively, thereby enabling the online battery pack to complete a safe charging operation.
Step S506: the retired power battery pack is charged; the electric energy in the sixth retired power battery pack is too large, the sixth retired power battery pack does not meet the condition of continuous charging any more, the pole difference of the SOC in the online battery pack is smaller than the preset SOC difference value, the electric energy in the online battery pack is balanced, the retired power battery pack already realizes the safe charging process at the moment, the retired power battery pack waits for a discharging operation instruction, and if the retired power battery pack receives the discharging operation instruction, the discharging process is continuously executed to realize the smooth switching between charging and discharging.
Step S507: disconnecting the internal contactor of the sixth retired power battery pack, and returning to the step S503; at this time, the sixth retired power battery pack cannot be charged continuously, so that an internal contactor of the sixth retired power battery pack needs to be disconnected in time, and the sixth retired power battery pack enters a charging prohibition mode; however, at this time, the electric energy in the online battery pack is still in an unbalanced state, and in order to protect the physical safety of the retired power battery pack, the step S503 is returned to, and the other online retired power battery packs in the retired power battery pack continue to be charged, so that the electric energy in the online battery pack can be in a balanced state.
As a preferred implementation manner, fig. 5 shows a specific implementation flow of charging protection for a decommissioned power battery pack in a charging process for an online decommissioned power battery pack according to an embodiment of the present invention, where the charging process includes steps S501 to S507 in fig. 4, and when the charging process is performed for the online decommissioned power battery pack, the charge and discharge control method further includes the following steps:
step S601: and acquiring the temperature of the online retired power battery pack according to the battery information.
Step S602: and judging whether the online retired power battery pack is in an over-temperature state.
Step S603: if the online retired power battery pack is in an over-temperature state, disconnecting a contactor inside the online retired power battery pack; combining the steps S601 to S603, during the charging process to the online retired power battery pack, the temperature of each online retired power battery pack can be monitored in real time according to the battery information of the retired power battery pack, when the temperature of the online retired power battery pack is too high, the contactor inside the online retired power battery pack is immediately disconnected, at this time, the charging circuit of the online retired power battery pack is disconnected, and the online retired power battery pack stops the charging operation, so as to avoid great physical damage to the online retired power battery pack caused by the too high temperature, thereby protecting the charging safety of the retired power battery pack.
Step S604: judging whether the offline retired power battery pack is in a fault state or not according to the battery information; if the offline retired power battery pack is not in a fault state, calculating a first voltage difference value of the offline retired power battery pack, wherein a calculation formula of the first voltage difference value is as follows:
in the above equation (3), the U7 is a first voltage difference value, the U8 is a cell voltage of the offline retired power battery pack, and the U9 is a cell voltage of the online retired power battery pack, wherein a difference amplitude between the cell voltage of the offline retired power battery pack and the cell voltage of the online retired power battery pack can be obtained through the first voltage difference value; it should be noted that the fault state of the offline retired power battery pack refers to: the internal charging circuit of the offline retired power battery pack has physical faults, for example, the internal charging circuit of the retired power battery pack has device damage and the like.
Step S605: if the first voltage difference value of the offline decommissioned power battery pack is smaller than the preset upper pressure difference limit, closing a contactor inside the offline decommissioned power battery pack; specifically, with reference to the embodiment of fig. 4, since the preset upper differential pressure limit is a maximum voltage difference value allowed when contactors of different retired power battery packs in the retired power battery pack are closed, only when an actual voltage difference value between the retired power battery packs is smaller than the preset upper differential pressure limit, the contactors in the offline retired power battery packs can be safely closed; therefore, in the embodiment of the invention, when the retired power battery pack is in the charging process, the offline retired power battery pack is not subjected to the charging operation due to the disconnection of the contactor inside the retired power battery pack, and only the online retired power battery pack in the retired power battery pack is subjected to the charging operation; therefore, in the above step S604 and step S605, when the offline decommissioned power battery pack is not in a fault state and the first voltage difference value of the offline decommissioned power battery pack is smaller than the preset voltage difference upper limit, it indicates that the contactor inside the offline decommissioned power battery pack has satisfied the closing condition, and the internal contactor in the offline decommissioned power battery pack can be safely closed, so that the offline decommissioned power battery pack is converted from the "offline state" to the "online state", and at this time, more decommissioned power battery packs can be present in the decommissioned power battery pack to perform charging operation, which not only ensures the charging safety of the decommissioned power battery pack but also improves the charging efficiency of the decommissioned power battery pack, and further, the charging and discharging control method in the embodiment of the present invention has higher practicability.
Preferably, fig. 6 shows a specific implementation flow of performing discharge protection on the retired power battery pack in the discharging process of the online retired power battery pack provided in the embodiment of the present invention; in an embodiment of the present invention, the discharging process includes steps S401 to S407 in fig. 3, where in the discharging process of the online retired power battery pack, the charging and discharging control method further includes the following steps:
step S701: and acquiring the temperature of the online retired power battery pack according to the battery information.
Step S702: and judging whether the online retired power battery pack is in an over-temperature state.
Step S703: if the online retired power battery pack is in an over-temperature state, disconnecting a contactor inside the online retired power battery pack; the embodiment of steps S701 to S703 in fig. 6 can refer to the above-mentioned embodiment of steps S601 to S603 in fig. 5; through steps S701 to S703, the online retired power battery pack can be prevented from being damaged due to high temperature, so as to maintain the discharge safety of the retired power battery pack.
Step S704: judging whether the offline retired power battery pack is in a fault state or not according to the battery information; if the offline retired power battery pack is not in a fault state, calculating a second voltage difference value of the offline retired power battery pack, wherein a formula of the second voltage difference value is as follows:
in the above equation (4), U10 is the second voltage difference, U11 is the cell voltage of the offline retired power battery pack, and U12 is the cell voltage of the online retired power battery pack, where the difference between the cell voltage of the offline retired power battery pack and the cell voltage of the online retired power battery pack can be obtained through the second voltage difference.
Step S705: if the second voltage difference value of the offline decommissioned power battery pack is smaller than the preset upper pressure difference limit, closing a contactor inside the offline decommissioned power battery pack; referring to the embodiments of step S604 and step S605 and the embodiment of fig. 3, when the retired power battery pack is discharged, if the offline retired power battery pack is not in a fault state and the second voltage difference value of the offline retired power battery pack is smaller than the preset voltage difference upper limit, the contactor inside the offline retired power battery pack is closed, so that the retired power battery pack in the embodiment of the present invention has a greater discharging efficiency.
Fig. 7 shows a module structure of the charge and discharge control device 80 for the retired power battery pack according to an embodiment of the present invention, where the retired power battery pack 90 includes M retired power battery packs, where M is a positive integer greater than or equal to 2, and as shown in fig. 7, the charge and discharge control device 80 includes: m battery management units 8011, 8012 … 801M-1, 801M, M communication management units 8021, 8022 … 802M-1, 802M, a control unit 803 and an energy storage converter 804; each battery management unit is connected with each retired power battery pack in a one-to-one correspondence mode, and the battery management units can acquire the operating parameters of the retired power battery packs; each communication management unit is in one-to-one corresponding connection with each battery management unit, and the operation parameters can be transmitted through the communication management units; the control unit 803 is connected with the M communication management units, each communication management unit transmits the operation parameters to the control unit 803, and the control unit 803 classifies and summarizes the operation parameters of the retired power battery pack to obtain a control signal of the retired power battery pack; the control signal comprises battery information of the retired power battery pack; the energy storage converter 804 is connected between the control unit 803 and the external power grid 100, the energy storage converter 804 performs power-on and power-on timing sequence control, discharge timing sequence control and charge timing sequence control on the retired power battery pack according to the control signal, and then the energy storage converter 804 performs adaptive control on the charge current amplitude and the discharge current amplitude of the retired power battery pack according to the control signal so as to realize a safe charging process and a safe discharging process of the retired power battery pack; it should be noted that the external power grid 100 refers to: an external power system connected to retired power battery pack 90; since the charge and discharge control device 80 in fig. 7 is a module structure corresponding to the charge and discharge control method in fig. 1, reference may be made to the embodiment in fig. 1 for a specific implementation of the charge and discharge control device 80, and details will not be repeated here.
As an alternative embodiment, in the charging and discharging control device 80, the communication management unit is in communication connection with the battery management unit through a CAN, the communication management unit is in communication connection with the control unit 803 through an RS485 interface, and the control unit 803 is in communication connection with the energy storage converter 804 through an RS232 interface.
As a preferred embodiment, the charge and discharge control device 80 further includes an over-temperature protection unit, the over-temperature protection unit is connected to the control unit 802, and when the retired power battery pack is charged or discharged, if the retired power battery pack is in an over-temperature state, the over-temperature protection unit sends out an over-temperature protection signal, and the retired power battery pack can be over-temperature protected by the over-temperature protection signal, so as to prevent: when the retired power battery pack is charged or discharged, the retired power battery pack is damaged by overhigh temperature; it should be noted that, the specific implementation of the over-temperature protection unit may refer to the embodiments of fig. 5 and fig. 6, and will not be described herein again;
in the charge and discharge control device 80 provided in the embodiment of the present invention, the battery management unit, the communication management unit, the control unit 803, the energy storage converter 804 and the over-temperature protection unit may be implemented by using an existing circuit structure or an existing functional chip in the conventional technology, for example, a person skilled in the art may implement a parameter acquisition function of the battery management unit by using a data acquisition device in the conventional technology; for another example, the communication management unit may be implemented by using a wireless transceiver chip, wherein the type of the wireless transceiver chip includes but is not limited to: TH71221 and XC4366 series; this is not limitative.
Claims (10)
1. A charging and discharging control method for a retired power battery pack, wherein the retired power battery pack comprises more than two retired power battery packs, and the charging and discharging control method comprises the following steps:
step S101: collecting the operating parameters of each retired power battery pack;
step S102: classifying and summarizing the operating parameters of the retired power battery pack to obtain battery information of the retired power battery pack;
step S103: performing power-on and power-on time sequence control on the retired power battery pack according to the battery information, and after the retired power battery pack is powered on and powered on, executing step S104 or step S105;
step S104: performing discharge time sequence control on the retired power battery pack according to the battery information, and after the retired power battery pack finishes discharging, executing step S105;
step S105: and performing charging time sequence control on the retired power battery pack according to the battery information, and after the retired power battery pack is charged, returning to the step S104.
2. The charge-discharge control method according to claim 1, wherein the operation parameters include: cell voltage, current, temperature, and SOC.
3. The charge and discharge control method according to claim 1, wherein the power-on and power-on timing sequence control is performed on the retired power battery pack according to the battery information, and specifically comprises:
step S301: sending a disconnection instruction to each retired power battery pack to disconnect a contactor inside the retired power battery pack;
step S302: determining a retired power battery pack with the lowest single voltage in the retired power battery pack according to the battery information;
step S303: and outputting a closing instruction to the retired power battery pack with the lowest monomer voltage to close a contactor inside the retired power battery pack.
4. The charge and discharge control method according to claim 1, wherein the discharge timing control is performed on the retired power battery pack according to the battery information, specifically:
step S401: obtaining a first battery pressure difference of an offline retired power battery pack according to the battery information;
step S402: when the first battery pressure difference is smaller than the preset pressure difference upper limit, a closing instruction is sent to the offline retired power battery pack, and a contactor inside the offline retired power battery pack is closed;
step S403: discharging all online retired power battery packs in the retired power battery pack;
step S404: determining a third retired power battery pack according to the battery information, wherein the third retired power battery pack is a retired power battery pack with the minimum voltage of a single battery in the online battery pack;
step S405: when the voltage of the single battery of the third retired power battery pack is smaller than a first preset cut-off voltage, comparing the pole difference of the SOC in the online battery pack with the preset SOC difference value; if the pole difference is smaller than the preset SOC difference value, executing step S406; if the pole difference is greater than or equal to the preset SOC difference value, executing step S407;
step S406: the retired power battery pack finishes discharging;
step S407: and disconnecting the internal contactor of the third retired power battery pack, and returning to the step S403.
5. The charge and discharge control method according to claim 1, wherein the charging sequence control is performed on the retired power battery pack according to the battery information, and specifically comprises:
step S501: obtaining a second battery pressure difference of the offline retired power battery pack according to the battery information;
step S502: when the second battery pressure difference is smaller than the preset pressure difference upper limit, a closing instruction is sent to the offline retired power battery pack, so that a contactor inside the offline retired power battery pack is closed;
step S503: charging all online retired power battery packs in the retired power battery pack;
step S504: judging a sixth retired power battery pack according to the battery information; the sixth retired power battery pack is a retired power battery pack with the maximum single voltage in the online battery pack;
step S505: when the monomer voltage of the sixth retired power battery pack is larger than a second preset cut-off voltage, comparing the pole difference of the SOC in the online battery pack with the preset SOC difference value; if the pole difference is smaller than the preset SOC difference value, executing step S506; if the pole difference is greater than or equal to the preset SOC difference value, executing step S507;
step S506: the retired power battery pack is charged;
step S507: and opening the internal contactor of the sixth retired power battery pack, and returning to the step S503.
6. The charging and discharging control method according to claim 5, wherein when the online retired power battery pack is charged, the charging and discharging control method further comprises:
step S601: acquiring the temperature of the online retired power battery pack according to the battery information;
step S602: judging whether the online retired power battery pack is in an over-temperature state;
step S603: if the online retired power battery pack is in an over-temperature state, disconnecting a contactor inside the online retired power battery pack;
step S604: judging whether the offline retired power battery pack is in a fault state or not according to the battery information; if the offline retired power battery pack is not in a fault state, calculating a first voltage difference value of the offline retired power battery pack;
step S605: and if the first voltage difference value of the offline retired power battery pack is smaller than the preset upper voltage difference limit, closing a contactor inside the offline retired power battery pack.
7. The charge and discharge control method according to claim 4, wherein during the discharging process of the online retired power battery pack, the charge and discharge control method further comprises:
step S701: acquiring the temperature of the online retired power battery pack according to the battery information;
step S702: judging whether the online retired power battery pack is in an over-temperature state;
step S703: if the online retired power battery pack is in an over-temperature state, disconnecting a contactor inside the online retired power battery pack;
step S704: judging whether the offline retired power battery pack is in a fault state or not according to the battery information; if the offline retired power battery pack is not in a fault state, calculating a second voltage difference value of the offline retired power battery pack;
step S705: and if the second voltage difference value of the offline retired power battery pack is smaller than the preset upper voltage difference limit, closing a contactor inside the offline retired power battery pack.
8. The utility model provides a charge-discharge control device of retired power battery group, retired power battery group includes M retired power battery package, M is more than or equal to 2 positive integer, its characterized in that, charge-discharge control device includes:
the battery management units are connected with the retired power battery packs in a one-to-one correspondence mode and used for acquiring the operating parameters of the retired power battery packs;
the M communication management units are connected with the battery management units in a one-to-one corresponding mode and used for transmitting the operation parameters;
the control unit is connected with the M communication management units and is used for classifying and summarizing the operating parameters of the retired power battery pack to obtain a control signal of the retired power battery pack;
and the energy storage converter is connected between the control unit and an external power grid and is used for carrying out power-on and power-on time sequence control, discharge time sequence control and charging time sequence control on the retired power battery pack according to the control signal.
9. The charging and discharging control device according to claim 8, wherein the communication management unit is in communication connection with the battery management unit through a CAN (controller area network), the communication management unit is in communication connection with the control unit through an RS485 interface, and the control unit is in communication connection with the energy storage converter through an RS232 interface.
10. The charge and discharge control device according to claim 8, further comprising an overheat protection unit;
the over-temperature protection unit is connected with the control unit and used for sending an over-temperature protection signal if the retired power battery pack is in an over-temperature state when the retired power battery pack is charged or discharged.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431228A (en) * | 2020-03-27 | 2020-07-17 | 东莞新能安科技有限公司 | Parallel battery pack charging and discharging management method and electronic device |
| CN114002601A (en) * | 2021-09-24 | 2022-02-01 | 河南利威新能源科技有限公司 | Method and device for calculating capacity of retired lithium ion battery cell |
| JP2022530291A (en) * | 2020-03-27 | 2022-06-29 | 東莞新能安科技有限公司 | Charging / discharging management method for parallel connection battery set, electronic device and electrical system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514513A (en) * | 2016-01-05 | 2016-04-20 | 惠州市蓝微新源技术有限公司 | Power battery charging and discharging control method and system |
| CN206673622U (en) * | 2017-03-20 | 2017-11-24 | 北京风光天赋科技有限公司 | A kind of battery ladder utilizes system |
| CN108110862A (en) * | 2017-11-29 | 2018-06-01 | 北京杉杉凯励新能源科技有限公司 | The charge-discharge control system of echelon lithium battery in communication base station |
| CN108232337A (en) * | 2017-12-07 | 2018-06-29 | 上海国际汽车城（集团）有限公司 | A kind of retired battery step check and evaluation of electric vehicle utilizes method |
| CN108248419A (en) * | 2017-12-18 | 2018-07-06 | 蔚来汽车有限公司 | Energy-storage battery charge-discharge system and method and relevant device |
| CN108281718A (en) * | 2017-12-28 | 2018-07-13 | 浙江赫克力能源有限公司 | A kind of restorative procedure of waste and old lead acid accumulator |
| CN108336780A (en) * | 2018-01-26 | 2018-07-27 | 北京匠芯电池科技有限公司 | A kind of echelon utilizes battery pack control method and system |
-
2018
- 2018-08-15 CN CN201810929771.7A patent/CN110838737B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514513A (en) * | 2016-01-05 | 2016-04-20 | 惠州市蓝微新源技术有限公司 | Power battery charging and discharging control method and system |
| CN206673622U (en) * | 2017-03-20 | 2017-11-24 | 北京风光天赋科技有限公司 | A kind of battery ladder utilizes system |
| CN108110862A (en) * | 2017-11-29 | 2018-06-01 | 北京杉杉凯励新能源科技有限公司 | The charge-discharge control system of echelon lithium battery in communication base station |
| CN108232337A (en) * | 2017-12-07 | 2018-06-29 | 上海国际汽车城（集团）有限公司 | A kind of retired battery step check and evaluation of electric vehicle utilizes method |
| CN108248419A (en) * | 2017-12-18 | 2018-07-06 | 蔚来汽车有限公司 | Energy-storage battery charge-discharge system and method and relevant device |
| CN108281718A (en) * | 2017-12-28 | 2018-07-13 | 浙江赫克力能源有限公司 | A kind of restorative procedure of waste and old lead acid accumulator |
| CN108336780A (en) * | 2018-01-26 | 2018-07-27 | 北京匠芯电池科技有限公司 | A kind of echelon utilizes battery pack control method and system |
Non-Patent Citations (2)
| Title |
|---|
| 王丰伟: "退役动力电池剩余容量梯次利用的关键技术研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
| 胡寿建等: "现代导轨电车牵引电池包技术特点及实际运行故障简析", 《现代城市轨道交通》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431228A (en) * | 2020-03-27 | 2020-07-17 | 东莞新能安科技有限公司 | Parallel battery pack charging and discharging management method and electronic device |
| JP2022530291A (en) * | 2020-03-27 | 2022-06-29 | 東莞新能安科技有限公司 | Charging / discharging management method for parallel connection battery set, electronic device and electrical system |
| JP7244635B2 (en) | 2020-03-27 | 2023-03-22 | 東莞新能安科技有限公司 | Charge/discharge management method, electronic device, and electrical system for parallel-connected battery set |
| US11949273B2 (en) | 2020-03-27 | 2024-04-02 | Dongguan Poweramp Technology Limited | Method for managing charging and discharging of parallel-connected battery pack, electronic device, and electrical system |
| CN114002601A (en) * | 2021-09-24 | 2022-02-01 | 河南利威新能源科技有限公司 | Method and device for calculating capacity of retired lithium ion battery cell |
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|---|---|
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