CN113496007A - Calculation method for adjusting electric capacity of battery module - Google Patents

Calculation method for adjusting electric capacity of battery module Download PDF

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Publication number
CN113496007A
CN113496007A CN202010199415.1A CN202010199415A CN113496007A CN 113496007 A CN113496007 A CN 113496007A CN 202010199415 A CN202010199415 A CN 202010199415A CN 113496007 A CN113496007 A CN 113496007A
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Prior art keywords
battery module
capacity
state
charge
algorithm
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郑萤光
王雍杰
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Taipu Power New Energy Changshu Co ltd
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Taipu Power New Energy Changshu Co ltd
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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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Electricity, gas or water supply
    • 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

According to an embodiment of the present invention, an algorithm for adjusting the capacity of a battery module is provided, which includes the following steps. Encrypting the electric capacity of a battery module according to payment condition information so as to adjust the electric capacity which can be released by the battery module from a maximum electric capacity Max to a preset value def; updating the payment condition information; and decrypting the electric capacity of the battery module according to the payment condition information so as to adjust the electric capacity which can be released by the battery module from the preset value def to a state electric capacity. The present invention can provide a commercial algorithm for adjusting the capacity of the battery module.

Description

Calculation method for adjusting electric capacity of battery module
Technical Field
The present invention relates to an algorithm for adjusting the capacity of a battery module, and more particularly, to an algorithm for adjusting the capacity of a battery module using charge status information.
Background
Recently, rechargeable battery modules are widely used as energy sources for mobile electronic devices, auxiliary battery modules, Electric Vehicles (EV), Hybrid Electric Vehicles (HEV), plug-in hybrid electric vehicles (plug-in HEV), or similar electronic devices. The chargeable and dischargeable battery module supplements the originally consumed electric energy back through a charging mode, and the time when the battery module is fully charged is related to the time when the battery module stops receiving the charging power. Therefore, it is very important to determine accurate Full Charge Capacity (FCC) information of the battery module.
Currently, there are some products for releasing a battery module to a full discharge, i.e., releasing its maximum capacity, in relation to a battery module that has been commercialized, such as a battery module for an electric vehicle. Some products, for specific purposes such as protecting the battery module or protecting the user's data, etc., allow the battery module to display a low power after releasing to a predetermined capacity, and simultaneously turn off the battery module to stop its power supply function.
Disclosure of Invention
An objective of an embodiment of the present invention is to provide an algorithm for adjusting the capacity of a battery module. Another objective of the present invention is to provide an algorithm for adjusting the usage capacity of a battery module by using payment status information.
According to an embodiment of the present invention, an algorithm for adjusting the capacity of a battery module is provided, which includes the following steps. Encrypting the electric capacity of a battery module so as to adjust the electric capacity which can be released by the battery module from a maximum electric capacity Max to a preset value def; receiving payment condition information; and decrypting the electric capacity of the battery module according to the payment condition information so as to adjust the electric capacity which can be released by the battery module from the preset value def to a state electric capacity.
In one embodiment, the state capacitance is greater than or equal to the preset value def, and the state capacitance is less than or equal to the maximum capacitance Max.
In one embodiment, the step of decrypting the capacity of the battery module according to the payment status information includes: and performing a full charge calculation program according to the payment condition information to obtain the electric capacity which can be released by the battery module.
In one embodiment, the full charge calculation procedure dependent on the payment condition information includes: obtaining an encrypted charge state of an encrypted open-circuit voltmeter according to the payment condition information and a decrypted charge state of a decrypted open-circuit voltmeter; and calculating the electric capacity of the battery module by using the encrypted charge state.
In one embodiment, the charge status information includes a decoding status degree, and the step of obtaining an encrypted charge state of an encrypted open-circuit voltmeter includes obtaining the encrypted charge state according to a system parameter, the decoding status degree and the decrypted charge state.
In one embodiment, the system parameter, the decoding state level, the decrypting charge state, and the encrypting charge state satisfy the following equations:
Figure BDA0002418844750000021
therein, SOCCipherFor the encrypted state of charge, TH is the system parameter representing the relative total charge saturation, SOCDecipherIs the decrypted charge state and the SOD is the decode state degree.
In one embodiment, the algorithm further comprises determining a health level of the battery module, and the magnitude of the state capacity is further determined by the health level.
In one embodiment, the algorithm further comprises: when the electric capacity of the battery module is lower than a low voltage value, the battery module cuts off the total power supply so that the battery module can only discharge till a low voltage protection point, wherein the low voltage protection point depends on the decoding state degree.
In one embodiment, the charge status information includes a gain value and a translation value, and the step of obtaining an encrypted charge state of an encrypted open-circuit voltmeter includes obtaining the encrypted charge state according to the gain value, the translation value and the decrypted charge state.
In one embodiment, the gain value, the translation value, the decrypted charge state, and the encrypted charge state satisfy the following equations:
SOCCipher＝Gain×(SOCDecipher-Offset)
therein, SOCCipherFor said encrypted state of charge, SOCDecipherFor the decrypted charge state, Gain is the Gain value and Offset is the translation value.
According to an embodiment of the present invention, a battery module is provided, which executes the algorithm for adjusting the capacitance of the battery module.
According to an embodiment of the present invention, an algorithm for commercially adjusting the capacity of a battery module is provided, which pre-encrypts the maximum capacity that the battery module can discharge, limits the battery module to release a preset value smaller than the maximum capacity, and allows a user to decrypt and release the limit of the capacity of the battery module by paying a fee, so that the user can use the maximum capacity of the battery module; or enables the user to use the state capacity of the battery module depending on the charge condition information. In one embodiment, the decoding state degree and the decrypting charge state of the decrypting open-circuit voltmeter are used for obtaining the encrypting charge state of the encrypting open-circuit voltmeter, and then the capacitance which can be used by the battery module is obtained, so that a simple decrypting method for the capacitance of the battery module is provided.
Drawings
FIG. 1 is a schematic diagram of a battery module coupled to an electrical device implementing an algorithm for adjusting capacitance according to an embodiment of the present invention;
FIG. 2 is a diagram showing a comparison of the decryption open-circuit voltmeter (a) and the encryption open-circuit voltmeter (b);
FIG. 3 is a graph showing a comparison of the capacities of the encrypted battery and the decrypted battery;
fig. 4 shows the positions of 0% SOC in the open table for decryption;
fig. 5 is a graph showing a comparison of the capacities of the encryption battery and the decryption battery for different health degrees;
FIG. 6 shows a comparison of the low voltage protection point UVP for different values of SOD;
fig. 7 shows a flowchart of an algorithm for adjusting the capacity of the battery module 100.
Description of the symbols
100: battery module
101: detection unit
103: memory cell
104: switch unit
105: control unit
110: battery core
120: battery management system
300: electrical device
Detailed Description
Hereinafter, the present invention will be described in detail by illustrating various exemplary embodiments thereof through the accompanying drawings. The inventive concept may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Moreover, in the drawings, like reference numerals may be used to designate like elements.
Fig. 1 is a schematic diagram of a battery module coupled to an electrical device, the battery module implementing an algorithm for adjusting capacitance according to an embodiment of the present invention. As shown in fig. 1, the electrical device 300 is coupled to a battery module 100, and the battery module 100 includes a battery management system 120 and a battery core 110. The battery cells 110 are coupled to the battery management system 120, and the battery management system 120 is used to estimate the capacity of the battery module 100. In the present embodiment, the electrical device 300 may be a mobile device, an auxiliary power supply device, an Electric Vehicle (EV), a Hybrid Electric Vehicle (HEV), a plug-in hybrid electric vehicle (plug-in HEV), an electric vehicle, or other electrical devices that can be charged and discharged with the battery module 100, and the type of the electrical device 300 is not limited in the present invention.
In one embodiment, the battery management system 120 (the portion surrounded by the dotted line) can calculate the capacity of the battery module 100, and includes a detection unit 101, a storage unit 103, a switch unit 104, and a control unit 105.
The detecting unit 101 is electrically connected to the battery cells 110 of the battery module 100 in parallel or in series, and is used for periodically measuring the open-circuit voltage of the battery cells 110. In one embodiment, the detecting unit 101 measures the current value of the battery cell 110 of the battery module 100 more periodically, and further performs coulomb counting based on the measured current value. The detecting unit 101 may be configured as a coulomb counter, which multiplies each measured current value by the time interval between consecutive measurements and continuously accumulates the multiplication result.
The memory unit 103 can store a full charge value and various parameters (described later) of the battery module 100, and store a full charge calculation program depending on the payment condition information. When an updated full charge is received, it can also update the stored full charge. The stored full charge may be provided as a reference for battery module operation, such as calculating remaining charge. The switching unit 104 can switch a circuit to control the charging and discharging of the battery module 100. The control unit 105 is connected to the detection unit 101, the storage unit 103, and the switch unit 104. The control unit 105 periodically estimates the state of charge when the battery cells 110 of the battery module 100 are discharging. The control unit 105 can also calculate the open-circuit voltage variation and stop the discharge of the battery module 100 when the open-circuit voltage conforms to a discharge termination condition. In addition, the control unit 105 can also control the switching unit 104 to control the charging or discharging of the battery module 100.
According to an embodiment of the present invention, a commercial algorithm for adjusting the capacity of the battery module 100 is provided, which pre-encrypts and limits the maximum capacity that the battery module 100 can discharge, so that the battery module 100 can only discharge a preset value smaller than the maximum capacity, and then allows the user to decrypt and open the limit of the capacity of the battery module by paying, so that the user can use the maximum capacity of the battery module. According to an embodiment of the present invention, an algorithm for adjusting the capacitance of the battery module 100 is provided, which can more finely parameterize the decryption of the capacitance and more accurately estimate the capacitance before and after decryption of the battery module, and introduces a new calculation factor for the algorithm by predefining the State of decryption (SOD) so as to allow a user to select the decryption degree of the capacitance and customize the capacitance that the battery module 100 can use, thereby achieving the requirement of using different capacitances according to different payments.
According to an embodiment of the present invention, an algorithm for adjusting the capacity of the battery module 100 is provided, which can be executed by the battery management system 120 and is capable of adjusting the capacity of the battery module 100 from a preset value def to a maximum capacity Max. The algorithm comprises the following steps.
Step S02: the electric capacity of the battery module 100 is encrypted according to a payment status information, so that the electric capacity that can be released by the battery module 100 is the preset value def.
Step S04: the battery management system 120 receives a payment status information.
Step S06: and decrypting the electric capacity of the battery module 100 according to the payment condition information, so that the electric capacity which can be released by the battery module 100 is adjusted from a preset value def to a state electric capacity. At this time, the state capacity is the maximum capacity Max, and the maximum capacity Max is greater than the preset value def. In one embodiment, the battery management system 120 may obtain the payment status information from the storage unit 103, and then obtain the updated payment status information from the outside according to the requirement or the command, so as to update the value of the state capacity.
According to the foregoing embodiment, the supplier of the battery module 100 can encrypt the battery module 100 for the maximum capacity Max that can be used at the time of shipment, so that the consumer cannot use the entire capacity, and if the consumer desires more capacity, a business model of upgrading by paying a fee is required to release the maximum capacity Max of the battery module 100. The upgrade concept of the present embodiment is a relationship between 0 and 1, that is, the capacity of the battery module 100 is the preset value def without upgrade (0) and the maximum capacity Max with full upgrade (1). However, considering that the consumer only wants to upgrade the battery module partially under the limited consideration of the expenses, the new calculation method of the electric capacity can be further improved to make the electric capacity of the battery module 100 between the preset value def and the maximum electric capacity Max.
In one embodiment, an algorithm is provided that can accurately decrypt the capacitance of the battery module 100, parameterize the capacitance to release the capacitance to different degrees, and accurately estimate the capacitance of the battery module 100 before and after decryption. In this specification, the Battery module 100 having the maximum capacity that can be Fully discharged is defined as a Fully decrypted Battery (fuse Battery), and if the Battery module 100 is not decrypted by an encryption function and only partially discharged, the Battery module 100 is called a encrypted Battery (fuse Battery). For example, a new battery module having a 10Ah capacity (maximum capacity Max) as the specification standard of one battery module 100 is called a fully-decrypted battery if the battery module 100 can discharge 10 Ah. If the battery module 100 passes through the encryption process and the electric capacity of the battery module is limited to 8Ah (preset value def) when the battery module is shipped from a factory, the battery module 100 is called an encrypted battery. Preferably, the encrypted Battery is passed through a decryption Process (decryptor Process) to release more state capacity (capacity representing the state of used capacity) between 8Ah and 10Ah, and at this time, the Battery module 100 is called a decrypted Battery (decryptor Battery).
An Open Circuit Voltage meter (OCV Table) is a common way to predict a residual capacity RC (Remaining capacity) of the battery, when the battery module 100 is stationary, the Voltage may be used to pair a state of charge (SOC) so as to obtain a percentage of the residual capacity RC in the total full charge capacity FCC, and the total full charge capacity FCC may gradually decay with time and charging/discharging degree. In one embodiment, the state of charge SOC at the instant of charging or discharging can be calculated using coulometry. The remaining capacity RC and the total saturated capacity FCC can be calculated by the charge coulomb counter and the discharge coulomb counter, and the total saturated capacity FCC can also be calculated by using the remaining capacity RC and the state of charge SOC (SOC ═ RC/FCC).
According to one embodiment of the present invention, a ciphered open circuit voltmeter (CIPHER OCV Table) concept is introduced. The open-circuit voltmeter used for completely decrypting the battery is defined as "decrypting open-circuit voltmeter", the open-circuit voltmeter used for encrypting the battery is "encrypting open-circuit voltmeter", and the two tables have a relationship with each other, such as a relationship that can be obtained in a mathematical model, and preferably, the two tables have a linear mapping relationship with each other. FIG. 2 shows a comparison of the decryption open-circuit voltmeter (a) and the encryption open-circuit voltmeter (b). As shown in fig. 2, the capacitance corresponding to the open-circuit voltmeter (b) is the relative total full charge capacity (Reduced FCC), and the capacitance corresponding to the open-circuit voltmeter (b) is the maximum total full charge capacity (maximum FCC). In fig. 2, the relative total charge-saturation capacity is less than 20% of the maximum total charge-saturation capacity. In the encrypted open-circuit voltmeter (b), the state of charge on the open-circuit voltmeter is around 0%, the battery management system 120 of the battery module 100 sends a stop signal to notify that the system is not capable of performing the current pumping action, and the battery module 100 is about to run out of power to turn off the switch of the battery module 100. In one embodiment, the battery module 100 issues a stop assist flag (stop assist flag).
Fig. 3 is a graph showing a comparison of the capacities of the encrypted battery and the decrypted battery. As shown in fig. 3, according to the algorithm of an embodiment of the present invention, a decoding State degree (SOD) factor is introduced, which means a decryption degree of the total full charge capacity FCC, where 100% SOD corresponds to complete decryption and 0% SOD corresponds to complete encryption, so that the battery module can dynamically adjust the capacity that the battery module can use according to different SOD settings. In addition, in one embodiment, a system parameter TH is introduced, which is a percentage of the relative total saturated capacity (Reduced FCC) to the maximum total saturated capacity (maximum FCC), for example, TH is 80%. Fig. 4 shows the positions of the states of 0% of the encrypted SOC for different SOD values in the decryption open-circuit voltage table. As shown in fig. 4, in the state where TH is 80%, the position where the encryption SOC is 0% and the decryption SOC is 0% is the same when SOD is 100%. When SOD is 0%, the encryption SOC is 0% and the decryption SOC is 20% at the same position. Thus, by SOD factor (orParameter), provides a method capable of performing hierarchical decryption, encrypts state of charge (SOC)Cipher) The calculation method of (2) may be as follows.
When SOC is reachedDecipherAt more than or equal to (1-TH) x (1-SOD), the charge State (SOC) is encryptedCipher) The equation is given by the following equation 1:
Figure BDA0002418844750000071
and when SOC isDecipher<(1-TH) × (1-SOD), SOCCipher＝0。
Therein, SOCCipherFor encrypting the state of charge, TH is the relative total charge saturation, SOCDecipherTo decrypt the charge state, the SOD is the decode state level. According to the foregoing embodiment, the increased capacitance that can be obtained after the user pays is MaximalFCC x (1-TH) x SOD. Where Maximal FCC is the maximum total saturated capacity.
As described above, in the present embodiment, the payment status information includes the decoding status SOD, and the value of the decoding status SOD may be between 0% and 100%. The SOD may correspond to the amount paid by the user, and thus the amount of the electric capacity that can be used by the battery module 100 may be determined according to the amount paid by the user. In one embodiment, the updated payment status information may be continuously received by the battery management system 120 and stored in the storage unit 103.
Encrypting state of charge (SOC)Cipher) The calculation method of (3) is not limited to the above calculation method, and other calculation methods may be used. In one embodiment, the state of charge (SOC) is encryptedCipher) To decrypt a state of charge (SOC)Decipher) Function of (2), encrypting the state of charge (SOC)Cipher) The calculation method of (2) may be as follows.
SOCCipher＝function(SOCDecipher)＝Gain×(SOCDecipher-Offset) (equation 2)
Where Gain is the Gain value and Offset is the translation value. In the whole, the original text will beSOC (1)DecipherAfter the value is translated (reduced first), and then multiplied by the amplification factor or gain (re-amplified), a new SOC can be obtainedCipherNumerical values. In the present embodiment, the payment status information includes the Gain value Gain and the Offset value, and the updated payment status information, i.e., the Gain value Gain and the Offset value Offset, can be continuously received by the battery management system 120 and stored in the storage unit 103.
Further, comparing the two examples of the formula 1 and the formula 2, it can be seen that the gain value in the example of the formula 1 is
Figure BDA0002418844750000072
Figure BDA0002418844750000073
The Offset value of the example of formula 1 is (1-TH) × (1-SOD).
Fig. 5 is a graph showing a comparison of the capacities of the encryption battery and the decryption battery for different health degrees. As shown in fig. 5, in an embodiment, the decrypted increased capacity is not an absolute value, but depends on a State of Health (SOH) of the battery module 100, the SOH is defined as a ratio of a total full charge FCC of the battery module to a total full charge FCC of a new product of the battery module, and the SOH is not equal to 100% as the battery module ages. When the health SOH is 100%, the decryption battery may have an extra capacity, i.e. a maximum FCC of 2 Ah. When the SOH is 90%, the decryption battery can have an extra capacity, i.e. a maximum FCC of 1.8 Ah. More specifically, in one embodiment, the increased capacitance that can be obtained is MaximalFCC × (1-TH) × SOD × SOH. Where Maximal FCC is the maximum total saturated capacity. That is, the magnitude of the state capacitance also depends on the health level.
In one embodiment, when the power of the battery module 100 is lower than a certain threshold Voltage, the battery module 100 cuts off the total power to prevent the encrypted battery from being discharged continuously until the original low Voltage Protection (UVP) of the battery module 100 after the capacity of the encrypted battery shows 0%. Fig. 6 shows a comparison graph of the low voltage protection point UVP without SOD values. As shown in fig. 6, in one embodiment, different low voltage protection points are used for different SOD values, and the low voltage protection points of the encrypted battery are state degree low voltage protection points (UVP1 and UVP2), and the state degree low voltage protection points (UVP1 and UVP2) are higher than the original low voltage protection points (UVP). In one embodiment, the value of the DOT low voltage protection point may be made dependent on (dependent on) SOD, TH, SOH, etc., i.e., the value of the DOT low voltage protection point may be changed according to the SOD, TH, SOH. More specifically, the lower the values of SOD, TH and SOH, the higher the protection points (UVP1 and UVP2) at the lower the state degree. For example, UVP1 at 50% SOD is less than UVP2 at 0% SOD.
Fig. 7 shows a flowchart of an algorithm for adjusting the capacity of the battery module 100. As shown in fig. 7, according to the algorithm of the embodiment of the invention, at the beginning of executing the algorithm program, the system parameter TH is read from the Non-volatile memory (Non-volatile memory) storage unit 103 of the battery module 100, the system parameter TH may be a fixed value, for example, 80% (step S10), then the adjustable or updated decoding state degree SOD is read from the storage unit 103, the value of the decoding state degree SOD is the system preset value, for example, 0% (step S12), according to the decoding state degree SOD and the system parameter TH, the full charge calculation procedure is executed (step S14), and the total full charge FCC obtained at this time depends on (dead on) the system SOD and TH. Is it judged whether or not SOD < 100%? If the SOD is less than 100% (step S16), the battery management system 120 of the battery module 100 continuously monitors whether there is an input of the SOD update command (step S18). If the SOD update command is inputted and the new adjustment value of the SOD is larger than the old system preset value (step S20), the value of the decoding state degree SOD is updated from the system preset value to the adjustment value (step S22), and the adjustment value is stored in the memory unit 103 of the battery module 100 (step S24), then the full charge calculation procedure is performed, and if the SOD is less than 100%, the SOD update command is monitored continuously.
In the embodiment of fig. 7, the decoding status level SOD is taken as an example of the payment status information. However, the decoding state degree SOD is not limited by the present invention. For example, in another embodiment, the Gain value Gain and the Offset value Offset may also be used as the payment status information.
According to an embodiment of the present invention, an algorithm for commercially adjusting the capacity of the battery module 100 is provided, which pre-encrypts the maximum capacity that the battery module 100 can discharge, limits the battery module 100 to release only a preset value smaller than the maximum capacity, and allows the user to decrypt and open the limitation of the capacity of the battery module 100 by paying a fee, so that the user can use the maximum capacity of the battery module 100; or enables the user to use the state capacity of the battery module 100 depending on the charge condition information. In one embodiment, the decoding state degree and the decrypting charge state of the decrypting open-circuit voltmeter are used to obtain the encrypting charge state of the encrypting open-circuit voltmeter, and then the capacitance of the battery module 100 is obtained, thereby providing a simple decrypting method for the capacitance of the battery module 100.

Claims (11)

1. An algorithm for adjusting the capacitance of a battery module, comprising:
encrypting the electric capacity of a battery module so as to adjust the electric capacity which can be released by the battery module from a maximum electric capacity Max to a preset value def;
receiving payment condition information; and
and decrypting the electric capacity of the battery module according to the payment condition information so as to adjust the electric capacity which can be released by the battery module from the preset value def to a state electric capacity.
2. The algorithm for adjusting the capacity of a battery module according to claim 1,
said state capacitance being greater than or equal to said preset value def, and
the state capacity is less than or equal to the maximum capacity Max.
3. The algorithm for adjusting battery module capacity according to claim 2, wherein the step of decrypting the battery module capacity according to the charge status information comprises:
and performing a full charge calculation program according to the payment condition information to obtain the electric capacity which can be released by the battery module.
4. The algorithm for adjusting the capacity of a battery module according to claim 3, wherein the full charge calculation procedure depending on the charge status information comprises:
obtaining an encrypted charge state of an encrypted open-circuit voltmeter according to the payment condition information and a decrypted charge state of a decrypted open-circuit voltmeter; and
calculating the capacity of the battery module using the encrypted state of charge.
5. The algorithm for adjusting the capacity of a battery module according to claim 4,
the payment status information includes a decoding status level, and
the step of obtaining an encrypted charge state of an encrypted open-circuit voltmeter includes obtaining the encrypted charge state according to a system parameter, the decoding state degree and the decrypted charge state.
6. The algorithm for adjusting the capacity of a battery module according to claim 5,
the system parameter, the decoding state degree, the decryption charge state and the encryption charge state conform to the following equations:
Figure FDA0002418844740000011
therein, SOCCipherFor the encrypted charge state, TH is the relative totalSaid system parameter of full charge, SOCDecipherIs the decrypted charge state and the SOD is the decode state degree.
7. The algorithm for adjusting the capacity of a battery module according to any one of claims 5 to 6,
the algorithm further includes determining a health level of the battery module, and
the magnitude of the state capacitance is more dependent on the health level.
8. The algorithm for adjusting the capacity of a battery module according to claim 7, further comprising:
when the capacity of the battery module is lower than a low voltage value, the battery module cuts off the total power supply so that the battery module can only discharge until a low voltage protection point,
wherein the low voltage protection point depends on the decoding state degree.
9. The algorithm for adjusting battery module capacity according to claim 4, wherein the charge status information comprises a gain value and a shift value, and
the step of obtaining an encrypted charge state of an encrypted open-circuit voltmeter includes obtaining the encrypted charge state according to the gain value, the translation value and the decrypted charge state.
10. The algorithm for adjusting the capacity of a battery module according to claim 9,
the gain value, the translation value, the decrypted charge state, and the encrypted charge state conform to the following equations:
SOCCipher＝Gain×(SOCDecipher-Offset)
therein, SOCCipherFor said encrypted state of charge, SOCDecipherFor the decrypted charge state, Gain isThe gain value and Offset is the translation value.
11. A battery module for performing the algorithm for adjusting the capacity of the battery module according to any one of claims 1 to 10.
CN202010199415.1A 2020-03-20 2020-03-20 Calculation method for adjusting electric capacity of battery module Pending CN113496007A (en)

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