Lithium battery fast charge management system based on Turbo technology and implementation method thereof

Abstract

The invention relates to the technical field of lithium battery charging, and provides a lithium battery fast charging management system based on a Turbo technology and an implementation method thereof, and the system comprises a Turbo control module which is used for dynamically switching a charging mode into a constant current mode, a constant voltage mode or a pulse mode according to the state of a lithium battery so as to dynamically adjust the charging state of the lithium battery; the temperature management module is used for carrying out heat dissipation treatment on the lithium battery according to the real-time charging temperature of the lithium battery exceeding a temperature threshold, so that the real-time charging temperature of the lithium battery is within a safe temperature range; the charging monitoring module is used for monitoring the states of the lithium battery in different charging modes in real time and feeding back the states to the Turbo control module and the temperature management module; wherein the lithium battery state comprises voltage, current, temperature and internal resistance data when the lithium battery is charged; the rapid charging management can be effectively carried out on the lithium battery, and the rapid charging speed, the safety and the service life of the lithium battery can be synergistically improved.

Description

Technical Field

[0001] This application relates to the technical field of lithium battery charging, and more specifically, to a fast charging management system for lithium batteries based on Turbo technology and its implementation method. Background Art

[0002] The development of rechargeable lithium batteries with fast charging capabilities is crucial for meeting the current demands of rapidly innovating portable electronic devices, electric vehicles, and grid energy storage. However, the core contradiction faced by current lithium battery fast charging technology is that it is difficult to balance charging speed, safety, and cycle life. The existing technologies have the following limitations: The traditional constant charging mode cannot adapt to the state changes of lithium batteries in a timely and dynamic manner. There is a greater risk of thermal runaway during high-rate charging, and it is difficult to break through the charging speed bottleneck. Moreover, when indirectly inferring the health state of lithium batteries based on macroscopic parameters such as voltage and temperature, it is difficult to adjust the fast charging strategy in a timely and dynamic manner, with obvious hysteresis, which also leads to a significant decrease in the cycle charging life of lithium batteries. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a fast charging management system for lithium batteries based on Turbo technology and its implementation method in view of the above-mentioned defects of the existing technology.

[0005] The technical solution adopted by this application to solve its technical problems is: A fast charging management system for lithium batteries based on Turbo technology and its implementation method, the system includes:

[0006] A Turbo control module, configured to dynamically switch the charging mode to a constant current mode, a constant voltage mode, or a pulse mode according to the state of the lithium battery, so as to dynamically adjust the charging state of the lithium battery;

[0007] A temperature management module, configured to dissipate heat from the lithium battery according to the real-time charging temperature of the lithium battery exceeding the temperature threshold, so that the real-time charging temperature of the lithium battery is within the safe temperature range;

[0008] A charging monitoring module, configured to monitor the state of the lithium battery in different charging modes in real time and feedback it to the Turbo control module and the temperature management module; wherein, the state of the lithium battery includes voltage, current, temperature, and internal resistance data during lithium battery charging.

[0009] In some embodiments, the Turbo control module is set with a fast Turbo mode, and the fast Turbo mode adopts high-frequency asymmetric pulse charging, uses reverse pulses to eliminate concentration polarization, and allows forward current; wherein, the high-frequency asymmetric pulse charging adopts forward large current pulses plus reverse micro current discharges.

[0010] In some embodiments, the Turbo control module is further set with an adaptive Turbo mode, which dynamically adjusts the ramp current based on the real-time internal resistance change. If the internal resistance of the lithium battery decreases by the first percentage, the current of the lithium battery increases by the second percentage; meanwhile, dynamic current limiting is performed in combination with the real-time temperature feedback of the lithium battery.

[0011] In some embodiments, the Turbo control module is further set with a protective Turbo mode, which adopts intermittent charging and uses machine learning to predict the optimal rest duration, so as to maintain the high-current output of the lithium battery based on the voltage rebound characteristics during the rest period within the optimal rest duration.

[0012] In some embodiments, the temperature management module is set with a hierarchical composite heat dissipation mode, and the hierarchical composite heat dissipation module is used to perform hierarchical heat dissipation processing on the lithium battery according to the real-time temperature of the lithium battery.

[0013] In some embodiments, the hierarchical composite heat dissipation mode includes:

[0014] The first-level heat dissipation mode, in which a microchannel phase change material interlayer is embedded between the battery cells of the lithium battery, and the local temperature rise is controlled by phase change heat absorption;

[0015] The second-level heat dissipation mode, in which a piezoelectric-driven micro vortex tube is installed on the lithium battery, and the waste electricity generated during charging is used to drive the vortex tube to generate low-temperature air flow to directionally cool the hot area.

[0016] In some embodiments, the system further includes:

[0017] A miniaturized EIS module, which is used to perform a full-frequency impedance scan every other period during the charging process, so as to judge the growth trend of the SEI film inside the lithium battery and the lithium dendrite in real time through the phase angle change at the characteristic frequency point.

[0018] In some embodiments, performing a full-frequency impedance scan every other period during the charging process includes:

[0019] When a sudden increase in the phase angle in the intermediate frequency region is detected, the temperature cooling is automatically triggered by the Turbo control module to perform heat dissipation processing on the lithium battery through the temperature management module; wherein, the frequency range of the intermediate frequency region is 1 - 100 Hz;

[0020] In some embodiments, performing a full-frequency impedance scan every other period during the charging process further includes:

[0021] If the impedance in the low-frequency region rises above the impedance threshold, the Turbo control module automatically triggers a switch to the pulse mode to apply a micro-current pulse to repair the SEI film; wherein, the frequency range of the low-frequency region is <1 Hz.

[0022] In some embodiments, the frequency range of the full frequency band is 0.1 Hz - 10 kHz.

[0023] The beneficial effects of this application are as follows: Different from the prior art, the lithium battery fast charging management system and its implementation method based on Turbo technology in this application can dynamically switch the charging mode to the constant current mode, constant voltage mode or pulse mode according to the lithium battery state through the Turbo control module to dynamically adjust the charging state of the lithium battery; the temperature management module dissipates heat from the lithium battery according to the real-time charging temperature of the lithium battery exceeding the temperature threshold so that the real-time charging temperature of the lithium battery is within the safe temperature range; the charging monitoring module monitors the state of the lithium battery in different charging modes in real time and feeds it back to the Turbo control module and the temperature management module; wherein, the lithium battery state includes voltage, current, temperature and internal resistance data during lithium battery charging; it can dynamically monitor, adjust and control the charging state of the lithium battery, effectively improve the charging rate of the lithium battery, reduce the charging time of the lithium battery, and extend the cycle charging life of the lithium battery, which helps to synergistically improve the fast charging speed, safety and service life of the lithium battery and is convenient for timely and effective charging management of the lithium battery. Description of the Drawings

[0024] Figure 1 is a schematic diagram of the lithium battery fast charging management system based on Turbo technology in an embodiment of this application;

[0025] Figure 2 is a schematic diagram of the heterogeneous computing architecture of FPGA plus neural network accelerator in an embodiment of this application;

[0026] Figure 3 is another schematic diagram of the lithium battery fast charging management system based on Turbo technology in an embodiment of this application;

[0027] Names and serial numbers of the markings in the figure: Turbo control module - 1; Fast Turbo mode - 11; Adaptive Turbo mode - 12; Protective Turbo mode - 13; Temperature management module - 2; Hierarchical composite heat dissipation mode - 21; Primary heat dissipation mode - 211; Secondary heat dissipation mode - 212; Charging monitoring module - 3; Miniaturized EIS module - 4. Detailed Embodiments

[0028] In the description, claims and drawings of this application, terms such as "first", "second", "third" and "fourth" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0029] Reference to "embodiments" in this context means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the application. The phrase may not necessarily refer to the same embodiment each time it appears in the description, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0030] "Plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0031] Moreover, terms indicating directions such as "upper", "lower", "front", "rear", "left", "right", "upper end", "lower end", etc. are all referenced based on the attitude position of the device or equipment described in this solution during normal use.

[0032] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of this application, rather than all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0033] Example 1: The embodiments of this application provide a lithium battery fast charging management system based on Turbo technology and its implementation method, which can dynamically monitor, adjust and control the charging state of the lithium battery, effectively improve the charging rate of the lithium battery, reduce the charging time of the lithium battery, and extend the cycle charging life of the lithium battery, contributing to the coordinated improvement of the fast charging speed, safety and service life of the lithium battery.

[0034] As Figure 1 shown, the lithium battery fast charging management system based on Turbo technology includes:

[0035] The Turbo control module 1 is used to dynamically switch the charging mode to a constant current mode, a constant voltage mode, or a pulse mode according to the state of the lithium battery, so as to dynamically adjust the charging state of the lithium battery;

[0036] Specifically, the Turbo control module 1 is set with a fast Turbo mode 11. The fast Turbo mode 11 adopts high-frequency asymmetric pulse charging, uses reverse pulses to eliminate concentration polarization, and allows forward current. Among them, the high-frequency asymmetric pulse charging adopts forward large current pulses plus reverse micro current discharges.

[0037] In the fast Turbo mode 11, the current charging level of the lithium battery is 0 - 30% SOC. By adopting high-frequency asymmetric pulse charging with forward large current pulses plus reverse micro current discharges, and precisely controlling the amplitude of the reverse pulse, not only can the capacity attenuation during reverse discharge be avoided, but also the graphite layer between the negative electrodes of the lithium battery can be re-ordered, improving the lithium ion intercalation efficiency, thereby increasing the charging rate.

[0038] Specifically, the Turbo control module 1 is also set with an adaptive Turbo mode 12. The adaptive Turbo mode 12 performs dynamic ramp current adjustment based on real-time internal resistance changes. If the internal resistance of the lithium battery decreases by the first percentage, the current of the lithium battery increases by the second percentage; at the same time, dynamic current limiting is performed in combination with the real-time temperature feedback of the lithium battery.

[0039] In the adaptive Turbo mode 12, the current charging level of the lithium battery is 31 - 80% SOC. The first percentage is at least 1%, and the second percentage is at least 3%. That is, when the internal resistance of the lithium battery decreases by 1%, the current of the lithium battery increases by 3% to adaptively adjust the charging efficiency. At the same time, the temperature influence should be considered to further dynamically adjust the charging process.

[0040] Specifically, the Turbo control module 1 is also set with a protective Turbo mode 13. The protective Turbo mode 13 adopts intermittent charging and uses machine learning to predict the optimal rest duration, so as to maintain a high current output of the lithium battery based on the voltage rebound characteristics during the rest period within the optimal rest duration.

[0041] In the protective Turbo mode 13, the current charging level of the lithium battery is 81 - 95% SOC. Intermittent charging is adopted, such as charging for 10 seconds and stopping for 1 second. The machine learning method can refer to the existing technology. It mainly predicts the result through big data training with the aim of optimizing the charging rest period. While ensuring a high current output, it can also avoid the occurrence of lithium plating phenomenon, thereby protecting the cycle charging life of the lithium battery.

[0042] This embodiment adopts a multi-dynamic Turbo mode, which can be based on real-time lithium battery status, such as SOC, temperature, etc., and combined with external requirements, such as presetting "Turbo priority", to achieve dynamic switching of corresponding charging modes, with higher charging efficiency and greater safety. For example, it can be implemented through a distributed Turbo controller. The distributed Turbo controller adopts, for example, Figure 2 the heterogeneous computing architecture of FPGA plus neural network accelerator as shown. It should be noted that in actual applications, the heterogeneous computing architecture of FPGA plus neural network accelerator can also be designed and selected in detail according to actual application needs. The illustration in the attached drawings is only an example and does not constitute a specific limitation.

[0043] The temperature management module 2 is used to dissipate heat from the lithium battery according to the real-time charging temperature of the lithium battery exceeding the temperature threshold, so that the real-time charging temperature of the lithium battery is within the safe temperature range;

[0044] During fast charging, the lithium battery is prone to heat generation, so it is necessary to dissipate heat from it efficiently. For example, the real-time temperature of the lithium battery can be controlled within the safe temperature range by using liquid cooling, air cooling or the effect of phase change materials.

[0045] Specifically, the temperature management module 2 is set with a hierarchical composite heat dissipation mode 21 to perform hierarchical heat dissipation processing on the lithium battery according to the real-time temperature of the lithium battery. The hierarchical composite heat dissipation mode 21 includes:

[0046] The primary heat dissipation mode 211, in which a microchannel phase change material interlayer is embedded between the battery cells of the lithium battery, and the local temperature rise is controlled by phase change heat absorption;

[0047] The secondary heat dissipation mode 212, in which a piezoelectric-driven micro vortex tube is installed on the lithium battery, and the waste electricity generated during charging is used to drive the vortex tube to generate low-temperature air flow to cool the hot area directionally. The energy required for the piezoelectric-driven micro vortex tube only accounts for 0.5% of the total charging energy, but the refrigeration power can reach 20W, and the heat dissipation effect is better.

[0048] This embodiment adopts the hierarchical composite heat dissipation mode 21, which can effectively control the charging temperature difference of the lithium battery, so that its charging temperature can be relatively stably within the safe temperature range, ensuring the charging safety of the lithium battery.

[0049] The charging monitoring module 3 is used to monitor the status of the lithium battery in different charging modes in real time and feedback it to the Turbo control module 1 and the temperature management module 2; among them, the lithium battery status includes voltage, current, temperature and internal resistance data of the lithium battery during charging.

[0050] Specifically, a multi-parameter fusion sensor array can be used to achieve real-time monitoring. The multi-parameter fusion sensor array, such as an integrated thin-film triaxial micro-machined heat flux sensor, can simultaneously measure temperature, heat flux direction, and local pressure, and cooperate with a flexible printed impedance detection electrode to achieve multi-physical field monitoring at the cell level.

[0051] Example 2: The embodiment of this application is based on a lithium battery fast charging management system and its implementation method based on Turbo technology provided in Embodiment 1. As Figure 3 shown, the lithium battery fast charging management system based on Turbo technology further includes:

[0052] A miniaturized EIS module 4, which is used to perform a full-band impedance scan every other period during the charging process to judge the growth trend of the SEI film inside the lithium battery and the trend of lithium dendrites in real time through the phase angle change at the characteristic frequency point.

[0053] Specifically, in this embodiment, performing a full-band impedance scan every other period during the charging process includes:

[0054] When a sudden increase in the phase angle in the intermediate frequency region is detected, the Turbo control module 1 automatically triggers the execution of temperature cooling to dissipate heat from the lithium battery through the temperature management module 2; among them, the frequency range of the intermediate frequency region is 1 - 100 Hz;

[0055] Specifically, in this embodiment, performing a full-band impedance scan every other period during the charging process further includes:

[0056] If the impedance in the low frequency region rises beyond the impedance threshold, the Turbo control module 1 automatically triggers a switch to the pulse mode to apply a micro-current pulse to repair the SEI film; among them, the frequency range of the low frequency region is <1 Hz.

[0057] Specifically, in this embodiment, the frequency range of the full band is 0.1 Hz - 10 kHz.

[0058] This embodiment realizes the monitoring of the health state at the subsurface level of the lithium battery by monitoring the internal change trend of the lithium battery, and significantly improves the cycle life of the lithium battery under the dynamic Turbo mode.

[0059] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of this application.

Claims

1. A lithium battery fast charging management system based on Turbo technology and its implementation method, characterized in that: The system comprises: Turbo control module, used to dynamically switch the charging mode to constant current mode, constant voltage mode or pulse mode according to the state of the lithium battery, so as to dynamically adjust the charging state of the lithium battery; A temperature management module, used to perform heat dissipation processing on the lithium battery according to the real-time charging temperature of the lithium battery exceeding the temperature threshold, so that the real-time charging temperature of the lithium battery is within a safe temperature range; The charging monitoring module is used to monitor the status of the lithium battery in different charging modes in real time and feed back to the Turbo control module and the temperature management module; wherein the status of the lithium battery includes the voltage, current, temperature and internal resistance data of the lithium battery during charging.

2. The Turbo technology-based lithium battery fast charging management system and its implementation method according to claim 1, characterized in that: The Turbo control module is set with a fast Turbo mode, which adopts high-frequency asymmetric pulse charging, utilizes reverse pulses to eliminate concentration polarization, and allows forward current; wherein, the high-frequency asymmetric pulse charging adopts forward large current pulses plus reverse micro current discharge.

3. The Turbo technology-based lithium battery fast charging management system and its implementation method according to claim 2, characterized in that: The Turbo control module is also set with an adaptive Turbo mode, which performs dynamic ramp current adjustment based on real-time internal resistance changes. If the internal resistance of the lithium battery decreases by the first percentage, the current of the lithium battery increases by the second percentage. At the same time, dynamic current limiting is performed in combination with the real-time temperature feedback of the lithium battery.

4. The Turbo technology-based lithium battery fast charging management system and implementation method thereof according to claim 2 or 3, characterized in that: The Turbo control module is also set with a protective Turbo mode, which adopts intermittent charging and uses machine learning to predict the optimal pause duration to maintain the high current output of the lithium battery within the optimal pause duration based on the voltage rebound characteristics during the pause period.

5. The Turbo technology-based lithium battery fast charging management system and its implementation method according to claim 1, characterized in that: The temperature management module is set with a graded composite heat dissipation mode, and the graded composite heat dissipation module is used to perform graded heat dissipation processing on the lithium battery according to the real-time temperature of the lithium battery.

6. The Turbo technology-based lithium battery fast charge management system and implementation method thereof according to claim 5, characterized in that: The hierarchical composite heat dissipation mode includes: The first-level heat dissipation mode embeds a microchannel phase change material interlayer between the lithium battery cells to control the local temperature rise through phase change heat absorption; The secondary heat dissipation mode installs a piezoelectrically driven micro vortex tube on the lithium battery, and uses the waste electricity generated during charging to drive the vortex tube to generate low-temperature airflow to directionally cool the hot zone.

7. The Turbo technology-based lithium battery fast charging management system and its implementation method according to claim 1, characterized in that: The system further comprises: The miniaturized EIS module is used to perform a full-band impedance scan at intervals during the charging process, so as to judge the SEI film growth and lithium dendrite trend inside the lithium battery in real time through the phase angle changes at characteristic frequency points.

8. The Turbo technology-based lithium battery fast charging management system and implementation method thereof according to claim 7, characterized in that: The full-band impedance scan is performed once every time interval during the charging process, comprising: When a sudden increase in the phase angle in the intermediate frequency region is detected, the Turbo control module is automatically triggered to perform temperature cooling, so as to dissipate heat for the lithium battery through the temperature management module; wherein the frequency range of the intermediate frequency region is 1-100 Hz.

9. The Turbo technology-based lithium battery fast charging management system and implementation method thereof according to claim 8, characterized in that: The performing a full-band impedance scan at intervals during the charging process also includes: If the impedance in the low-frequency zone rises above the impedance threshold, the Turbo control module automatically triggers switching to the pulse mode to apply micro-current pulses to repair the SEI film; wherein the frequency range of the low-frequency zone is <1 Hz.

10. The Turbo technology-based lithium battery fast charging management system and implementation method thereof according to any one of claims 7 to 9, characterized in that: The frequency range of the full frequency band is 0.1 Hz-10 kHz.

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