CN106450551A - System and method for screening and recombining decommissioned nickel-metal hydride battery modules used in energy storage power stations - Google Patents

Abstract

A screening and recombination system and method for a decommissioned nickel-hydrogen battery module of an energy storage power station relate to the field of decommissioned battery recycling. The invention aims to solve the problems that the workload is huge due to the adoption of monomer screening for screening and recombination after the retirement of the existing nickel-hydrogen power battery of the electric automobile, and the cost of screening and recombination is increased due to the need of re-packaging the grouped shells. The consistency of nine aspects of discharging capacity, charging capacity, voltage, internal resistance, temperature change rate, charge retention capacity, service life and full-electricity mark appearance time of the decommissioned nickel-hydrogen battery module are comprehensively considered, and the scientificity and accuracy of the consistency of the decommissioned nickel-hydrogen battery module are ensured. The invention is suitable for the field of recycling of retired batteries.

Description

System and method for screening and recombining decommissioned nickel-metal hydride battery modules used in energy storage power stations

technical field

The invention belongs to the field of reuse of decommissioned batteries.

Background technique

After the Ni-MH power batteries for electric vehicles are decommissioned, many Ni-MH power batteries still maintain a usable capacity of close to 80%. Therefore, these retired Ni-MH power batteries can be screened, regrouped, and applied to energy storage power stations.

However, after the Ni-MH power batteries of electric vehicles are decommissioned, if single screening is used, the workload is huge, and group casing packaging needs to be repackaged, which increases the cost of screening and reorganization.

Contents of the invention

The present invention is to solve the screening and reorganization of the existing Ni-MH power batteries of electric vehicles after they are decommissioned. The use of monomer screening results in a huge workload, and the need to re-package in groups of shells increases the cost of screening and recombination. Now it provides A system and method for screening and recombining retired nickel-metal hydride battery modules in energy storage power stations.

Screening and recombination system for decommissioned nickel-hydrogen battery modules used in energy storage power stations, which includes:

Charge and discharge test equipment: used to detect the rate discharge capacity, rate charge capacity, voltage, internal resistance, temperature, temperature change rate, charge retention, lifespan and time when the full charge mark appears of N retired Ni-MH battery modules to be screened , N is a positive integer;

Consistency evaluation platform: used to evaluate the discharge performance consistency, charge performance consistency, voltage consistency, internal resistance consistency, temperature consistency, temperature change rate consistency, and charge consistency of N retired Ni-MH battery modules to be screened Maintain quantity consistency, life consistency and time consistency when the full power mark appears;

Comprehensive screening evaluation unit: used to screen N retired Ni-MH battery modules to be screened according to the consistency results;

Grouping unit: used to combine the retired Ni-MH battery modules retained after screening into a battery system.

A method for screening and recombining retired nickel-metal hydride battery modules used in energy storage power stations, the method comprising the following steps:

Charge and discharge test steps: used to detect the rate discharge capacity, rate charge capacity, voltage, internal resistance, temperature, temperature change rate, charge retention, lifespan and time when the full charge mark appears of the N retired Ni-MH battery modules to be screened ;

Consistency evaluation step: used to evaluate the discharge performance consistency, charge performance consistency, voltage consistency, internal resistance consistency, temperature consistency, temperature change rate consistency, charge Maintain quantity consistency, life consistency and time consistency when the full power mark appears;

Comprehensive screening evaluation step: used to screen the N retired Ni-MH battery modules to be screened according to the consistency results;

Grouping step: used to combine the retired Ni-MH battery modules retained after screening into a battery system.

The system and method for screening and reorganizing decommissioned nickel-hydrogen battery modules used in energy storage power stations according to the present invention uses nickel-hydrogen battery modules as screening units, which can reduce a lot of working time and reduce large screening and reorganization costs. The screening and reorganization of retired Ni-MH battery modules should pay more attention to safety than new Ni-MH batteries, and the performance consistency of Ni-MH batteries is directly related to the safety of reassembled batteries. The invention is applicable to the field of reuse of decommissioned batteries.

Description of drawings

Fig. 1 is a structural block diagram of a system for screening and recombining decommissioned nickel-metal hydride battery modules for energy storage power stations according to the first embodiment.

detailed description

Specific implementation mode 1: This implementation mode is specifically described with reference to FIG. 1. The decommissioned nickel-metal hydride battery module screening and reorganization system for energy storage power stations described in this implementation mode includes:

Charge and discharge test equipment: used to detect the rate discharge capacity, rate charge capacity, voltage, internal resistance, temperature, temperature change rate, charge retention, lifespan and time when the full charge mark appears of N retired Ni-MH battery modules to be screened , N is a positive integer;

Consistency evaluation platform: used to evaluate the discharge performance consistency, charge performance consistency, voltage consistency, internal resistance consistency, temperature consistency, temperature change rate consistency, and charge consistency of N retired Ni-MH battery modules to be screened Maintain quantity consistency, life consistency and time consistency when the full power mark appears;

Comprehensive screening evaluation unit: used to screen N retired Ni-MH battery modules to be screened according to the consistency results;

Grouping unit: used to combine the retired Ni-MH battery modules retained after screening into a battery system.

The current methods for screening, reorganizing and reusing retired Ni-MH battery modules are mainly in terms of discharge capacity and voltage consistency, which are not comprehensive enough. The patent of the present invention comprehensively considers the consistency of discharge capacity, charging capacity, voltage, internal resistance, temperature, temperature change rate, charge retention capacity, lifespan and the appearance time of the full charge mark of the decommissioned Ni-MH battery module to ensure the decommissioned Ni-MH battery module The scientificity and accuracy of battery module consistency.

Specific embodiment 2: This embodiment is a further description of the decommissioned nickel-hydrogen battery module screening and reorganization system for energy storage power stations described in specific embodiment 1. In this embodiment,

Charge and discharge test equipment includes the following units: rate discharge capacity measurement unit, rate charge capacity measurement unit, voltage measurement unit, internal resistance measurement unit, temperature and temperature change rate measurement unit, charge retention measurement unit, life measurement unit and full charge Identify the time-of-occurrence measurement unit;

Consistency evaluation platform includes the following units: discharge performance consistency evaluation unit, charging performance consistency evaluation unit, voltage consistency evaluation unit, internal resistance consistency evaluation unit, temperature and temperature change rate consistency evaluation unit, charge retention consistency Performance evaluation unit, life consistency evaluation unit and full power mark appearance time consistency evaluation unit;

The rate discharge capacity data output end of the rate discharge capacity measurement unit is connected to the rate discharge capacity data input end of the discharge performance consistency evaluation unit,

The rate charging capacity data output terminal of the rate charging capacity measuring unit is connected to the rate charging capacity data input terminal of the charging performance consistency evaluation unit,

The voltage data output terminal of the voltage measurement unit is connected to the voltage data input terminal of the voltage consistency evaluation unit,

The internal resistance data output end of the internal resistance measurement unit is connected to the internal resistance data input end of the internal resistance consistency evaluation unit,

The temperature and temperature change rate data output end of the temperature and temperature change rate measurement unit is connected to the temperature and temperature change rate data input end of the temperature and temperature change rate consistency evaluation unit,

The charge retention data output end of the charge retention measurement unit is connected to the charge retention data input end of the charge retention consistency evaluation unit,

The life data output end of the life measurement unit is connected to the life data input end of the life consistency evaluation unit,

The full power mark appearance time output terminal of the full power mark appearance time measurement unit is connected to the full power mark appearance time input end of the full power mark appearance time consistency evaluation unit,

The discharge performance consistency evaluation result output port of the discharge performance consistency evaluation unit, the charging performance consistency evaluation result output port of the charging performance consistency evaluation unit, the voltage consistency evaluation result output port of the voltage consistency evaluation unit, and the internal resistance consistency The output terminal of the internal resistance consistency evaluation result of the evaluation unit, the temperature and temperature change rate consistency evaluation result output port of the temperature and temperature change rate consistency evaluation unit, and the charge retention consistency evaluation unit’s charge retention consistency evaluation The output end of the result, the output end of the life consistency evaluation result of the life consistency evaluation unit, and the output end of the consistency result output end of the appearance time consistency result of the full power mark of the evaluation unit are simultaneously connected to the evaluation result input end of the comprehensive screening evaluation unit.

Embodiment 3: The method for screening and recombining decommissioned nickel-metal hydride battery modules used in energy storage power stations described in this embodiment includes the following steps:

Charge and discharge test steps: used to detect the rate discharge capacity, rate charge capacity, voltage, internal resistance, temperature, temperature change rate, charge retention, lifespan and time when the full charge mark appears of the N retired Ni-MH battery modules to be screened ;

Consistency evaluation step: used to evaluate the discharge performance consistency, charge performance consistency, voltage consistency, internal resistance consistency, temperature consistency, temperature change rate consistency, charge Maintain quantity consistency, life consistency and time consistency when the full power mark appears;

Comprehensive screening evaluation step: used to screen the N retired Ni-MH battery modules to be screened according to the consistency results;

Grouping step: used to combine the retired Ni-MH battery modules retained after screening into a battery system.

In this embodiment, seven types of data are collected, including discharge capacity, charge capacity, voltage, internal resistance, temperature, charge retention capacity, and lifespan of retired nickel-metal hydride battery modules, and are analyzed through discharge performance consistency, charge performance consistency, and voltage consistency. , Internal resistance consistency, temperature consistency, charge retention consistency and lifetime consistency. Obtain the consistent value of discharge performance, consistent value of charging performance, consistent value of voltage, consistent value of internal resistance, consistent value of temperature, consistent value of charge retention ability, consistent value of life, and consistency of time when the full charge mark appears, and Make corresponding evaluations. According to the above eight types of consistency values, a comprehensive evaluation of the screening of retired lithium-ion battery modules is carried out, and the evaluation results are obtained. The decommissioned nickel-metal hydride battery modules that meet the group requirements are connected in series or in parallel to form a battery system.

Embodiment 4: This embodiment is to further explain the method for screening and recombining decommissioned nickel-metal hydride battery modules used in energy storage power stations described in Embodiment 3. In this embodiment, after the grouping step, the battery system is applied to In the energy storage power station.

Embodiment 5: This embodiment is to further explain the method for screening and recombining decommissioned nickel-metal hydride battery modules used in energy storage power stations described in Embodiment 3. In this embodiment, in the grouping step, the grouping method includes Retired Ni-MH battery modules are connected in series or in parallel.

Claims (5)

1. The decommissioned nickel-metal hydride battery module screening and recombination system for energy storage power stations is characterized in that it includes: Charge and discharge test equipment: used to detect the rate discharge capacity, rate charge capacity, voltage, internal resistance, temperature, temperature change rate, charge retention, lifespan and time when the full charge mark appears of N retired Ni-MH battery modules to be screened , N is a positive integer; Consistency evaluation platform: used to evaluate the discharge performance consistency, charge performance consistency, voltage consistency, internal resistance consistency, temperature consistency, temperature change rate consistency, and charge consistency of N retired Ni-MH battery modules to be screened Maintain quantity consistency, life consistency and time consistency when the full power mark appears; Comprehensive screening evaluation unit: used to screen N retired Ni-MH battery modules to be screened according to the consistency results; Grouping unit: used to combine the retired Ni-MH battery modules retained after screening into a battery system. 2. The decommissioned nickel-metal hydride battery module screening and reorganization system for energy storage power stations according to claim 1, wherein the charge and discharge test equipment includes the following units: rate discharge capacity measurement unit, rate charge capacity measurement unit, voltage measurement unit Unit, internal resistance measurement unit, temperature and temperature change rate measurement unit, charge retention measurement unit, life measurement unit and full charge mark appearance time measurement unit; Consistency evaluation platform includes the following units: discharge performance consistency evaluation unit, charging performance consistency evaluation unit, voltage consistency evaluation unit, internal resistance consistency evaluation unit, temperature and temperature change rate consistency evaluation unit, charge retention consistency Performance evaluation unit, life consistency evaluation unit and full power mark appearance time consistency evaluation unit; The rate discharge capacity data output end of the rate discharge capacity measurement unit is connected to the rate discharge capacity data input end of the discharge performance consistency evaluation unit, The rate charging capacity data output terminal of the rate charging capacity measuring unit is connected to the rate charging capacity data input terminal of the charging performance consistency evaluation unit, The voltage data output terminal of the voltage measurement unit is connected to the voltage data input terminal of the voltage consistency evaluation unit, The internal resistance data output end of the internal resistance measurement unit is connected to the internal resistance data input end of the internal resistance consistency evaluation unit, The temperature and temperature change rate data output end of the temperature and temperature change rate measurement unit is connected to the temperature and temperature change rate data input end of the temperature and temperature change rate consistency evaluation unit, The charge retention data output end of the charge retention measurement unit is connected to the charge retention data input end of the charge retention consistency evaluation unit, The life data output end of the life measurement unit is connected to the life data input end of the life consistency evaluation unit, The full power mark appearance time output terminal of the full power mark appearance time measurement unit is connected to the full power mark appearance time input end of the full power mark appearance time consistency evaluation unit, The discharge performance consistency evaluation result output port of the discharge performance consistency evaluation unit, the charging performance consistency evaluation result output port of the charging performance consistency evaluation unit, the voltage consistency evaluation result output port of the voltage consistency evaluation unit, and the internal resistance consistency The output terminal of the internal resistance consistency evaluation result of the evaluation unit, the temperature and temperature change rate consistency evaluation result output port of the temperature and temperature change rate consistency evaluation unit, and the charge retention consistency evaluation unit’s charge retention consistency evaluation The output end of the result, the output end of the life consistency evaluation result of the life consistency evaluation unit, and the output end of the consistency result output end of the appearance time consistency result of the full power mark of the evaluation unit are simultaneously connected to the evaluation result input end of the comprehensive screening evaluation unit. 3. A method for screening and recombining decommissioned nickel-metal hydride battery modules used in energy storage power stations, characterized in that the method comprises the following steps: Charge and discharge test steps: used to detect the rate discharge capacity, rate charge capacity, voltage, internal resistance, temperature, temperature change rate, charge retention, lifespan and time when the full charge mark appears of the N retired Ni-MH battery modules to be screened ; Consistency evaluation step: used to evaluate the discharge performance consistency, charge performance consistency, voltage consistency, internal resistance consistency, temperature consistency, temperature change rate consistency, charge Maintain quantity consistency, life consistency and time consistency when the full power mark appears; Comprehensive screening evaluation step: used to screen the N retired Ni-MH battery modules to be screened according to the consistency results; Grouping step: used to combine the retired Ni-MH battery modules retained after screening into a battery system. 4. The method for screening and recombining decommissioned nickel-metal hydride battery modules for energy storage power stations according to claim 3, characterized in that, after the grouping step, the battery system is applied to the energy storage power station. 5. The method for screening and recombining decommissioned nickel-metal hydride battery modules used in energy storage power stations according to claim 3, wherein in the grouping step, the grouping method includes connecting decommissioned nickel-hydrogen battery modules in series or in parallel.