CN113488708B - Method for recycling unqualified storage battery pack - Google Patents
Method for recycling unqualified storage battery pack Download PDFInfo
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- CN113488708B CN113488708B CN202110601930.2A CN202110601930A CN113488708B CN 113488708 B CN113488708 B CN 113488708B CN 202110601930 A CN202110601930 A CN 202110601930A CN 113488708 B CN113488708 B CN 113488708B
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells 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
- H01M10/54—Reclaiming serviceable parts of waste accumulators
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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
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a method for recycling an unqualified storage battery pack, which comprises the steps of screening, reselecting, repairing and reorganizing, wherein each single battery of the unqualified storage battery pack is fully charged during screening, the internal resistance of each single battery is obtained, screening is carried out according to the internal resistance, and repairable single batteries are selected; when in reselection, primary combination is carried out on repairable single batteries to form a primary storage battery pack, a charge and discharge test is carried out on the primary storage battery pack, the capacity of each repairable single battery is obtained, screening is carried out according to the capacity, and the single battery to be repaired is selected; when repairing, repairing each single battery to be repaired by using high-frequency pulse; and (3) measuring the capacity of the repaired single battery during recombination, and recombining according to the capacity to form a recombined storage battery pack, wherein the recombined storage battery pack is put into use or stored. Therefore, the invention can effectively prolong the service life of the battery, avoid the waste caused by the replacement of the whole battery set and can manage the battery normally.
Description
Technical Field
The invention relates to the technical field of storage battery regeneration, in particular to a method for recycling an unqualified storage battery pack.
Background
The conventional backup storage battery pack of the direct current system has the defects of single-section or multi-section capacity deficiency caused by the vulcanization phenomenon of the storage battery, so that the normal operation of the whole group of batteries is influenced, the whole group of batteries are required to be replaced, the investment cost is large, the timeliness is low, and the daily operation safety of the direct current system is seriously influenced.
The storage battery at the present stage only has supervision means at two node parts of network access test and network operation, but the storage battery warehouse-in temporary put, retired battery warehouse-in temporary put, repair battery temporary put and the like lack supervision means, and the battery self-discharge phenomenon exists during each stage temporary put, so that the health state of the battery is seriously influenced, and the battery can be managed best only by accurately supervising the whole period of the storage battery.
Disclosure of Invention
Aiming at the defects, the technical problems to be solved by the invention are as follows: the method for recycling the unqualified storage battery pack can effectively prolong the service life of the battery, avoid waste caused by replacement of the whole storage battery pack and manage the battery in a standardized way.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a method for recycling an unqualified storage battery pack comprises the following steps:
step one, screening: fully charging all the single batteries of the unqualified storage battery pack, acquiring the internal resistance of each single battery, screening according to the internal resistance, and selecting repairable single batteries;
step two, reselection: primary combination is carried out on the repairable single batteries to form a primary storage battery pack, a charge and discharge test is carried out on the primary storage battery pack, the capacity of each repairable single battery is obtained, screening is carried out according to the capacity, and the single battery to be repaired is selected;
step three, repairing: repairing each single battery to be repaired by using high-frequency pulse;
step four, recombination: and measuring the capacity of the repaired single battery, and recombining according to the capacity to form a recombined storage battery pack, wherein the recombined storage battery pack is put into use or stored.
Preferably, the third step specifically comprises: and repairing the single battery to be repaired by using a high-frequency pulse repairing instrument, wherein the charging and discharging current is gradually increased to 10 hours from the current lower than 10 hours, the waiting time after the discharging is set, the single battery to be repaired starts to charge after being cooled, the charging setting time is at least 2 times of the discharging time, and the full charging of the single battery to be repaired is ensured.
Preferably, the standard of the initial combination in the second step is: repairable unit cells of brand, nominal capacity, and year proximity are assembled into a group.
Preferably, before the first step, the method further comprises the following steps: identification: and setting a label bar code or a two-dimensional code on the unqualified storage battery, and identifying the label bar code or the two-dimensional code by the wireless transmission terminal and transmitting an identification signal corresponding to the unqualified storage battery to the control platform.
Preferably, in the step one, the step of fully charging each unit cell of the failed storage battery pack includes:
building at least one set of direct current system;
at least four normal storage battery packs are connected in parallel under each set of direct current system;
and fully charging each single battery of the identified unqualified storage battery pack.
In the first step, the step of obtaining the internal resistance of each single battery, screening according to the internal resistance, and selecting repairable single batteries includes:
measuring the internal resistance of the single battery by using an internal resistance meter, and transmitting an internal resistance signal corresponding to the internal resistance of each single battery to the control platform by using the internal resistance meter;
the control platform matches the internal resistance signal with a preset internal resistance;
dividing each single battery into A class, B class or C class according to the matching result;
class A and class B single batteries are taken as repairable single batteries, and class C is removed and cannot be repaired.
Preferably, the second step specifically includes:
primary combining the class a and class B repairable cells to form a primary battery pack;
performing a charge-discharge test on the primary storage battery pack to obtain the capacity of each repairable single battery;
matching the capacity of each repairable single battery with a preset capacity;
dividing repairable single batteries into a first class, a second class or a third class according to the matching result;
the first class is finished storage batteries, the second class is storage batteries to be repaired, and the third class is rejected and not repaired.
Preferably, in the fourth step, the recombination principle includes:
(1) The matching is carried out in the same-loop single battery;
(2) 0.1CA discharge capacity is more than or equal to 100 percent;
(3) After standing for 72h, the open-circuit voltage of the single battery is 220-223 v/single battery;
(4) Standing for 72h, wherein the open-circuit voltage difference of the single batteries in the same group is less than or equal to 10mV;
(5) And in the discharge stage of capacity detection, when the end point or the measuring point is reached, the discharge voltage difference of the single batteries in the same group is less than or equal to 50mV.
Preferably, the storing of the reorganized storage battery pack in the fourth step includes:
the recombinant storage battery pack is in a floating charge state, and a plurality of groups are connected in parallel;
the standard recombined storage battery pack is a 220V system battery pack, and if the recombined storage battery pack is left, the recombined storage battery pack can be divided into a 48V system for floating charge.
Preferably, in the steps of screening, reselecting, repairing and/or recombining, the monomer voltage of each single battery is obtained, and the monomer voltage is transmitted to the control platform.
After the technical scheme is adopted, the invention has the beneficial effects that:
the method for recycling the unqualified storage battery pack comprises the steps of screening, reselecting, repairing and reorganizing, wherein each single battery of the unqualified storage battery pack is fully charged during screening, the internal resistance of each single battery is obtained, screening is carried out according to the internal resistance, and repairable single batteries are selected; when in reselection, primary combination is carried out on repairable single batteries to form a primary storage battery pack, a charge and discharge test is carried out on the primary storage battery pack, the capacity of each repairable single battery is obtained, screening is carried out according to the capacity, and the single battery to be repaired is selected; when repairing, repairing each single battery to be repaired by using high-frequency pulse; and (3) measuring the capacity of the repaired single battery during recombination, and recombining according to the capacity to form a recombined storage battery pack, wherein the recombined storage battery pack is put into use or stored. Therefore, the invention can effectively prolong the service life of the battery, avoid the waste caused by the replacement of the whole battery set and can manage the battery normally.
Since the method further comprises the following steps before the first step: identification: setting a label bar code or a two-dimensional code on the unqualified storage battery, and identifying the label bar code or the two-dimensional code by the wireless transmission terminal and transmitting an identification signal corresponding to the unqualified storage battery to the control platform; the screening efficiency is improved, and effective management is realized.
In the first step, the internal resistance of each single battery is obtained, and screening is performed according to the internal resistance, so that the repairable single battery is selected, and the method comprises the following steps: measuring the internal resistance of the single battery by using an internal resistance meter, and transmitting an internal resistance signal corresponding to the internal resistance of each single battery to a control platform by using the internal resistance meter; the control platform matches the internal resistance signal with a preset internal resistance; dividing each single battery into A class, B class or C class according to the matching result; the A-type and B-type single batteries are used as repairable single batteries, the C-type single batteries are removed and cannot be repaired, the unrepairable single batteries are discharged, and the repairing efficiency is improved.
The second step specifically comprises the following steps: primary combining the class a and class B repairable cells to form a primary battery pack; performing a charge-discharge test on the primary storage battery pack to obtain the capacity of each repairable single battery; matching the capacity of each repairable single battery with a preset capacity; dividing repairable single batteries into a first class, a second class or a third class according to the matching result; the first class is finished storage batteries, the second class is storage batteries to be repaired, and the third class is removed and not repaired, so that the repair efficiency is further improved.
In the screening, reselection, repair and/or recombination steps, the single voltage of each single battery is obtained and transmitted to the control platform, so that the health state of each single battery is detected in real time, and the battery is managed properly.
In summary, the method for recycling the unqualified storage battery pack solves the technical problems that the service life of the battery is limited and the cost for replacing the battery is increased due to the fact that the unqualified storage battery pack is not fully and periodically monitored in the prior art.
Detailed Description
The present invention will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
A method for recycling an unqualified storage battery pack comprises the following steps:
step one, screening: fully charging all the single batteries of the unqualified storage battery pack, acquiring the internal resistance of each single battery, screening according to the internal resistance, and selecting repairable single batteries;
step two, reselection: primary combination is carried out on the repairable single batteries to form a primary storage battery pack, a charge and discharge test is carried out on the primary storage battery pack, the capacity of each repairable single battery is obtained, screening is carried out according to the capacity, and the single battery to be repaired is selected; the criteria for the initial combination in this example are: the unit batteries to be repaired with brands, nominal capacities and close years are combined into a group.
Step three, repairing: repairing each single battery to be repaired by using high-frequency pulse;
step four, recombination: measuring the capacity of the repaired single battery, and recombining according to the capacity to form a recombined storage battery pack, wherein the recombined storage battery pack is put into use or stored; in this example, the recombination principle includes:
(1) The matching is carried out in the same-loop single battery;
(2) 0.1CA discharge capacity is more than or equal to 100 percent;
(3) After standing for 72h, the open-circuit voltage of the single battery is 220-223 v/single battery;
(4) Standing for 72h, wherein the open-circuit voltage difference of the single batteries in the same group is less than or equal to 10mV;
(5) And in the discharge stage of capacity detection, when the end point or the measuring point is reached, the discharge voltage difference of the single batteries in the same group is less than or equal to 50mV.
After the method of the invention is adopted, the unqualified storage battery is recombined after four steps of screening, reselecting, repairing and recombining, thereby effectively prolonging the service life of the battery, avoiding the waste caused by the replacement of the whole battery group, and realizing the standard management by monitoring the health state of the battery in whole period.
The third step is as follows: and repairing the single battery to be repaired by using a high-frequency pulse repairing instrument, wherein the charging and discharging current is gradually increased to 10 hours from the current lower than 10 hours, the waiting time after the discharging is set, the single battery to be repaired starts to charge after being cooled, the charging setting time is at least 2 times of the discharging time, and the full charging of the single battery to be repaired is ensured.
The high-frequency pulse repairing instrument can be automatically carried out according to set parameters, can be set for multiple times of circulation, can be set for each time of circulation parameters, and adopts progressive setting to improve repairing efficiency. And in the test process of the tester, the voltage of each battery monomer is wirelessly collected, and the voltage is matched with a battery bar code to transmit data into a background for recording and analysis. The data of the capacity state of each battery can be read through the handheld terminal after the test is finished, and the data information can be read through the handheld terminal in the repairing process, and the read state is the last cycle test state value of the battery.
The example further comprises the following steps before the first step: identification: and setting a label bar code or a two-dimensional code on the unqualified storage battery, and identifying the label bar code or the two-dimensional code by the wireless transmission terminal and transmitting an identification signal corresponding to the unqualified storage battery to the control platform.
In the first example, the step of fully charging each single battery of the unqualified storage battery pack comprises the following steps:
building at least one set of direct current system;
at least four normal storage battery packs are connected in parallel under each set of direct current system;
and fully charging each single battery of the identified unqualified storage battery pack.
In the first step, the internal resistance of each single battery is obtained, and the step of screening according to the internal resistance to select repairable single batteries comprises the following steps:
measuring the internal resistance of the single battery by using an internal resistance meter, and transmitting an internal resistance signal corresponding to the internal resistance of each single battery to a control platform by using the internal resistance meter;
the control platform matches the internal resistance signal with a preset internal resistance;
dividing each single battery into A class, B class or C class according to the matching result;
class A and class B single batteries are taken as repairable single batteries, and class C is removed and cannot be repaired.
Because the quantity of the single batteries is large, individual single batteries are behind serious, for example, the C-type batteries cannot be repaired, and in order to avoid repeated work and influence on efficiency, the C-type batteries can be initially and quickly screened out. And through the rapid test of the internal resistance meter, the control platform automatically analyzes the judgment result.
The second step of this example specifically includes:
primary combining the class a and class B repairable cells to form a primary battery pack;
performing a charge-discharge test on the primary storage battery pack to obtain the capacity of each repairable single battery;
matching the capacity of each repairable single battery with a preset capacity;
dividing repairable single batteries into a first class, a second class or a third class according to the matching result;
the first class is finished storage batteries, the second class is storage batteries to be repaired, and the third class is rejected and not repaired.
Category(s) | Capacity range | Remarks |
First kind | 80% or more | Finished product |
Second kind | 40%--80% | Repair of |
Third class | Less than 40% | Rejection of |
And a charge and discharge circulation system and a direct current charger are adopted for charge and discharge test. And in the test process of the tester, the voltage of each battery cell is wirelessly acquired, and the data is matched with the bar code of the battery and transmitted into a background for recording and analysis, so that the test is completed, and the system platform immediately analyzes and obtains the state and classification grade of each battery.
The handheld terminal can read the state grade of each single battery in real time.
In step four of this example, the storage of the reorganized battery pack comprises:
the recombinant storage battery pack is in a floating charge state, and a plurality of groups are connected in parallel;
the standard recombined storage battery pack is a 220V system battery pack, and if the recombined storage battery pack is left, the recombined storage battery pack can be divided into a 48V system for floating charge.
The battery pack is not immediately put into use after the recombination is completed, and when the battery pack is replaced as a backup, the health performance state is required to be kept all the time, so that when the battery at the standby station is in fault and needs to be replaced urgently, the 'storage backup battery pack' can be truly 'taken and used at once'. Traditional storage battery management is only put in the warehouse, is in an open circuit state, is deficient in power for a long time, is charged when the storage battery management needs to be used, and cannot be recovered to a health state meeting the requirements. The scheme is designed to carry out floating charge management on the storage battery, and the storage standby battery is assembled on the high-performance direct-current charger, so that the battery pack is in a floating charge state, and the voltage and internal resistance states of all the monomers are monitored in real time, so that the performance state of the storage battery is mastered, and multiple groups of parallel management can be realized. And (3) carrying out internal resistance test on the battery regularly in an automatic mode, automatically uploading data, automatically analyzing a state result, and automatically prompting the battery when an alarm occurs to form automatic management. If the battery pack is in a 'storage standby state' for a long time, a charge and discharge test is carried out on the battery pack according to a maintenance and management mode of the storage battery pack of the transformer substation so as to maintain the active state of the battery pack.
A storage battery operating mode; normally in a floating state, the multiple groups are connected in parallel, and the current field area is tentatively used for supporting four groups in the floating state with the same system as storage. The standard composition is 220V system battery pack, if the assembled battery is left, the assembled battery pack can be divided into 48V system for float charging.
Maintaining the storage battery; the monthly maintenance is carried out for routine maintenance, the cleanliness of the battery is kept, the tightness of the connecting strip is checked,
the internal resistance test is automatically carried out by controlling the quaternary maintenance, the test period can be set to automatically carry out the test, the data is automatically uploaded, and the battery health state is automatically analyzed. The semi-annual maintenance passes the 30% check test, automatically uploads data for battery health analysis, the annual maintenance passes the 100% full-capacity charge-discharge test, the capacity of the storage battery is detected, the activity of the storage battery is activated and maintained, and the automatic uploading analysis of the health state is performed.
The charge and discharge test control is carried out according to the workload of the storage battery reorganization, and the charge and discharge workload of each day is arranged, so that four groups or more can be developed simultaneously. The test can be started manually or by platform communication control, and the test is automatically carried out according to the set parameters.
In the screening, reselection, repair and/or recombination steps, the single voltage of each single battery is obtained and transmitted to the control platform.
The physical terminal sensor can collect the monitored single voltage, single internal resistance, terminal voltage of the storage battery and the ambient temperature of the storage battery (the temperature of each section of polar post can be considered by combining cost) in real time, wherein the single voltage, the single internal resistance and the terminal voltage can draw historical curves, an analysis chart is generated in background software, all the historical curves can be stored for at least one year, and trend prediction alarm and telemetry value out-of-limit alarm can be set.
The monitoring device is provided with a backup power supply (storage battery), so that the monitoring device can still complete a fault data recording function in a short time under the condition of voltage loss of the direct current system, and the accident analysis is convenient;
considering the situation that a single battery of the storage battery is rapidly deteriorated and needs to be dismantled, the device can provide shielding and dismantling storage battery monitoring function under the situation that the whole storage battery lacks a plurality of batteries, ensures that the residual storage battery is continuously monitored and is not influenced by the dismantling storage battery, and is beneficial to maintenance work development;
the method can monitor the charge and discharge current conditions of the storage battery, draw a charge and discharge current curve and generate an analysis report to guide the analysis work of the check charge and discharge test.
The system can support the data access of the repairing device and the capacity allocation group device, and realize full-process full-period closed-loop supervision.
The above-mentioned preferred embodiments of the present invention are not intended to limit the present invention, and any modification, equivalent to a method for recycling an unacceptable battery pack, etc. within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (1)
1. The method for recycling the unqualified storage battery pack is characterized by comprising the following steps of:
step one, screening: fully charging all the single batteries of the unqualified storage battery pack, acquiring the internal resistance of each single battery, screening according to the internal resistance, and selecting repairable single batteries;
step two, reselection: primary combination is carried out on the repairable single batteries to form a primary storage battery pack, a charge and discharge test is carried out on the primary storage battery pack, the capacity of each repairable single battery is obtained, screening is carried out according to the capacity, and the single battery to be repaired is selected;
step three, repairing: repairing each single battery to be repaired by using high-frequency pulse;
step four, recombination: measuring the capacity of the repaired single battery, and recombining according to the capacity to form a recombined storage battery pack, wherein the recombined storage battery pack is put into use or stored;
before the first step, the method further comprises the following steps:
identification: setting a label bar code or a two-dimensional code on the unqualified storage battery, and identifying the label bar code or the two-dimensional code by the wireless transmission terminal and transmitting an identification signal corresponding to the unqualified storage battery to the control platform;
in the steps of screening, reselection, repair and/or recombination, obtaining the monomer voltage of each single battery, and transmitting the monomer voltage to a control platform;
the third step is specifically as follows: repairing the single battery to be repaired by using a high-frequency pulse repairing instrument, wherein the charging and discharging current is gradually increased to 10 hours from a current lower than 10 hours, the waiting time is set after the discharging is finished, the single battery to be repaired starts to charge after being cooled, the charging setting time is at least 2 times of the discharging time, and the full charging of the single battery to be repaired is ensured;
the standard of the primary combination in the second step is as follows: combining the repairable single batteries with brands, nominal capacities and close years into a group;
the step of fully charging each unit cell of the failed storage battery pack in the step one includes:
building at least one set of direct current system;
at least four normal storage battery packs are connected in parallel under each set of direct current system;
fully charging each single battery of the unqualified storage battery after identification;
in the first step, the step of obtaining the internal resistance of each single battery and screening according to the internal resistance to select repairable single batteries comprises the following steps:
measuring the internal resistance of the single battery by using an internal resistance meter, and transmitting an internal resistance signal corresponding to the internal resistance of each single battery to the control platform by using the internal resistance meter;
the control platform matches the internal resistance signal with a preset internal resistance;
dividing each single battery into A class, B class or C class according to the matching result;
the A-type and B-type single batteries are taken as repairable single batteries, and C-type single batteries are removed and cannot be repaired;
the second step specifically comprises the following steps:
primary combining the class a and class B repairable cells to form a primary battery pack;
performing a charge-discharge test on the primary storage battery pack to obtain the capacity of each repairable single battery;
matching the capacity of each repairable single battery with a preset capacity;
dividing repairable single batteries into a first class, a second class or a third class according to the matching result;
the first class is finished storage batteries, the second class is storage batteries to be repaired, and the third class is rejected and not repaired;
in the fourth step, the recombination principle includes:
(1) The matching is carried out in the same-loop single battery; (2) 0.1CA discharge capacity is more than or equal to 100%; (3) After standing for 72h, the open-circuit voltage of the single battery is 220-223 v/single battery; (4) Standing for 72h, wherein the open-circuit voltage difference of the single batteries in the same group is less than or equal to 10mV; and (5) in the capacity detection discharge stage, when the end point or the measuring point is reached, the discharge voltage difference of the same group of single batteries is less than or equal to 50mV;
and in the fourth step, the storage of the recombinant storage battery pack comprises the following steps:
the recombinant storage battery pack is in a floating charge state, and a plurality of groups are connected in parallel;
the standard recombined storage battery pack is a 220V system battery pack, and if the recombined storage battery pack is left, the recombined storage battery pack can be divided into a 48V system for floating charge.
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