Intelligent battery circulation charging method and device

Abstract

The invention discloses an intelligent battery circulation charging method and device. The method includes detecting a current voltage per cell of a plurality of cells in the battery device; according to a plurality of voltage ranges in the mapping table and a plurality of charging times corresponding to the voltage ranges, after detecting and determining that the current voltage of each battery unit falls in one of the voltage ranges, charging the battery unit by using a fixed current in one of the charging times corresponding to one of the voltage ranges; and charging the battery device using the fixed voltage.

Description

Technical Field

[0001] The present disclosure relates to an intelligent battery cycle charging device, and more particularly to an intelligent battery cycle charging device for detecting the power of a battery device to determine a constant current charging time. Background Art

[0002] With the development of technology, many existing electronic devices are powered by battery devices. Among many types of battery devices, lithium-ion batteries are widely used as secondary batteries in 3C (computer, communication, and consumer electronics), EV (electric vehicle), ESS (energy storage system), low-orbit satellite batteries and various IT products. The commonly used systems of lithium-ion batteries are as follows: lithium cobalt oxide (LiCoO2; LCO), nickel-cobalt-manganese (nickel-cobalt-manganese; NCM) (ternary), and nickel-cobalt-aluminum (nickel-cobalt-aluminum; NCA).

[0003] However, due to the development of the circular economy, increasing the number of charge and discharge times of battery devices to extend the life of the battery devices has become a challenge. Therefore, a charging device that can minimize the damage to the battery device caused by charging is needed. Summary of the invention

[0004] The present disclosure provides an intelligent battery cycle charging method. The intelligent battery cycle charging method includes detecting the current voltage of each battery cell of a plurality of battery cells in a battery device; after detecting and determining that the current voltage of each battery cell falls within one of the voltage ranges according to a plurality of voltage ranges and a plurality of charging times corresponding to the voltage ranges in a mapping table, charging the battery cell using a fixed current at one of the charging times corresponding to one of the voltage ranges; and charging the battery cell using a fixed voltage.

[0005] The present disclosure provides an intelligent battery cycle charging device. The intelligent battery cycle charging device includes a battery device and a charging device. The battery device has a plurality of battery cells. The charging device has a processor and a mapping table, and is coupled to the battery cells. The mapping table has a plurality of voltage ranges and a plurality of charging times corresponding to the voltage ranges. After the processor detects and determines that the current voltage of each battery cell of the battery cell falls within one of the voltage ranges, the processor controls the charging device to use a fixed current to charge the battery cell in one of the charging times corresponding to one of the voltage ranges, and after one of the charging times, the processor controls the charging device to charge the battery cell using a fixed voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to make the description of the present disclosure include the above examples, other advantages and features, the principles briefly described above will be described in more detail through specific examples in the accompanying drawings. It should be understood that the drawings shown here are only examples of the present disclosure and cannot limit the scope of the present disclosure. The principles of the present disclosure are described and explained with additional features and details through the accompanying drawings.

[0007] Figure 1 A schematic diagram of a charging device is shown according to an embodiment of the present disclosure.

[0008] Figure 2 A schematic diagram of a battery device is shown according to an embodiment of the present disclosure.

[0009] Figure 3 A graph showing a charging device charging a battery device according to an embodiment of the present disclosure is shown.

[0010] Figure 4 Schematic diagrams showing various series-parallel combinations of battery cells of a battery device according to an embodiment of the present disclosure.

[0011] Figure 5A and Figure 5B A flow chart of a battery cyclic charging method is shown according to an embodiment of the present disclosure.

[0012]

Explanation of symbols

[0013] 100: Charging device

[0014] 102: Processor

[0015] 104: Battery device

[0016] 106:Battery Charger

[0017] 108: Power Supply

[0018] 110:Battery pack

[0019] 112: Management chip

[0020] 114: Sensing resistor

[0021] 116: Charging transistor

[0022] 118: Discharge transistor

[0023] 120: Fuse

[0024] 122:Battery cell

[0025] 124: Control Line

[0026] 126: Control Line

[0027] 302: Curve

[0028] 304: Curve

[0029] 306: Curve

[0030] 402:Battery pack

[0031] 404:Battery Pack

[0032] 406:Battery Pack

[0033] 408:Battery Pack

[0034] 410: Battery cell

[0035] 500:Battery cycle charging method

[0036] 502-536: Operation DETAILED DESCRIPTION

[0037] The following disclosure provides many different embodiments or examples to implement the different features of the present application. The following disclosure describes specific examples of various components and their arrangements to simplify the description. Of course, these specific examples are not intended to be limiting. For example, if the present disclosure describes a first feature formed on or above a second feature, it means that it may include an embodiment in which the first feature and the second feature are in direct contact, and may also include an embodiment in which an additional feature is formed between the first feature and the second feature, so that the first feature and the second feature may not be in direct contact. In addition, the same reference symbols and / or marks may be reused in different examples of the following disclosure. These repetitions are for the purpose of simplicity and clarity, and are not intended to limit the specific relationship between the different embodiments and / or structures discussed.

[0038] For the purpose of the detailed description of the present disclosure, unless specifically denied, singular words include plural words and vice versa. And the word "include" means "include without limitation". In addition, approximation terms such as "about", "almost", "quite", "roughly", etc. can be used in the embodiments of the present disclosure, and their meanings are such as "at, close to or close to" or "within 3 to 5%" or "within acceptable manufacturing tolerances" or any logical combination.

[0039] In addition, it is related to spatial terms. For example, "below", "lower", "above", "higher", and similar terms are used to facilitate the description of the relationship between one element or feature and another element or feature in the diagram. In addition to the orientation shown in the accompanying drawings, these spatially related terms are intended to include different orientations of the device in use or operation. For example, if the device in the schematic diagram is reversed, the elements described as "below" or "below" other elements or features will also become "above" other elements or features. In this way, the exemplary word "below" will cover both upward and downward interpretations. In addition, the device may be turned to different orientations (rotated 90 degrees or other orientations), and the spatially related terms used here may also be interpreted in the same way.

[0040] The terms used herein are used only for the purpose of describing specific embodiments and do not limit the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms as well. In addition, to the extent that the terms "encompass", "comprise", "comprises", "has", "has", "including", or variations thereof are used in the detailed description and / or claims, these terms are intended to be inclusive in a manner similar to "comprises".

[0041] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art. In addition, terms such as those defined in general dictionaries should be interpreted as having the same meaning as in the context of the relevant art, and will not be understood as idealized or overly formal unless explicitly defined herein.

[0042] Figure 1According to an embodiment of the present disclosure, a schematic diagram of a charging device 100 is shown. The charging device 100 includes a processor 102, a battery device 104, and a battery charger 106. The battery device 104 is coupled to the processor 102 to communicate with the charging device 100. In addition, the processor 102 is coupled to the battery charger 106 to control the charging of the battery device 104 by the charging device 100. The power supply 108 is connected to the battery charger 106 of the charging device 100. The power supply 108 can be a DC power supply, or a DC power supply converted from an AC power supply. The battery charger 106 is coupled to the battery device 104 to transmit the power provided by the power supply 108 to the battery device 104 to charge the battery device 104. The charging device 100 can also be other electronic devices having a processor 102 and a battery charger 106 for charging the battery device 104. For example, the charging device 100 can be a notebook computer, a tablet computer, a smart phone, other 3C electronic products, etc. It should be understood that in the charging device 100 , other configurations and different items or some items may be omitted, and the charging device 100 is only an example and does not limit the present disclosure.

[0043] Figure 2 A schematic diagram of a battery device 104 is further shown according to an embodiment of the present disclosure. Figure 2 As shown, the battery device 104 described above may further include a battery pack 110, a management chip 112, a sensing resistor 114, a charging transistor 116, a discharging transistor 118, and a fuse 120. It should be understood that in the battery device 104, other configurations and different items or some items may be omitted, and the battery device 104 is only an example and does not limit the present disclosure.

[0044] The battery pack 110 may include a plurality of battery cells 122. The battery cells 122 may be connected together in a mixture of series and parallel. The battery cells 122 may store electricity. In this embodiment, the battery cells 122 may be lithium-ion batteries. A lithium-ion battery is a rechargeable battery (secondary battery) that operates by the movement of lithium ions between a positive electrode and a negative electrode. The positive electrode of a lithium-ion battery is generally composed of a metal oxide containing lithium ions, and the negative electrode is generally a lattice composed of graphite. During charging, the lithium ions move toward the graphite lattice. During discharge, the lithium ions move toward the metal oxide. The process of lithium ions entering the positive electrode (metal oxide) is called intercalation, and the process of leaving is called deintercalation; the process of lithium ions entering the negative electrode (graphite lattice) is called insertion, and the process of leaving is called extraction.

[0045] The management chip 112 is connected to the battery pack 110 to detect the voltage or charge of the battery pack 110 (specifically, the battery cell 122). The charging transistor 116 and the discharging transistor 118 are coupled between the battery pack 110 and the positive electrode P+ of the battery device 104. The management chip 112 is connected to the charging transistor 116 and the discharging transistor 118 to control the charging transistor 116 and the discharging transistor 118, thereby controlling the charging and discharging of the battery device 104. For example, the charging transistor 116 changes its state according to the control signal transmitted by the management chip 112 through the control line 124. For example, when the control signal of the control line 124 is "0", the charging transistor 116 only allows the current to flow from the node B to the node A, but prohibits the current from the node A to the node B. When the control signal of the control line 124 is "1", the charging transistor 116 is in a fully conductive state. In some embodiments, the discharging transistor 118 changes its state according to the control signal transmitted by the management chip 112 through the control line 126. For example, when the control signal of the control line 126 is "0", the discharge transistor 118 only allows current to flow from node A to node B, but prohibits current from node B to node A. When the control signal of the control line 126 is "1", the discharge transistor 118 is in a fully on state.

[0046] When the battery device 104 is connected to an external power source (e.g. Figure 1 When the management chip 104 transmits a control signal "0" to the charging transistor 116 and transmits a control signal "0" to the discharging transistor 118, the battery pack 110 can be connected to the external power source, so that the received power can be stored in the battery cell 122 of the battery pack 110. When the management chip 104 transmits a control signal "0" to the charging transistor 116 and transmits a control signal "0" to the discharging transistor 118, the battery pack 110 can be disconnected from the external power source, so that the battery device 104 stops being charged.

[0047] When the management chip 112 transmits a control signal “0” to the charging transistor 116 and transmits a control signal “1” to the discharging transistor 118, the battery pack 110 can be connected to the processor 102 of the charging device 100, so that the battery device 104 provides power to the charging device 100. When the management chip 112 transmits a control signal “0” to the charging transistor 116 and transmits a control signal “0” to the discharging transistor 118, the battery pack 110 and the charging device 100 can be disconnected, so that the battery device 104 stops providing power.

[0048] The management chip 112 is an integrated circuit device, which may include a processor, a microprocessor, a controller, a memory, other suitable integrated circuits or a combination thereof. The management chip 112 may detect the voltage, power, etc. of the battery pack 110 (or the battery device 104), and control the battery device 104 according to the detected data.

[0049] The sensing resistor 114 is coupled to the battery pack 110, the management chip 112, and the negative electrode P- of the battery device 104, and the sensing resistor 114 can detect the discharge current of the battery device 104. In some embodiments, when the battery device 104 is connected to the processor 102 of the charging device 100, the management chip 445 can check whether the discharge current exceeds the protection value through the discharge current of the battery device 104 detected by the sensing resistor 114. When the discharge current of the battery device 104 exceeds the protection value, the management chip 112 can control the charging transistor 116 and the discharging transistor 118 to stop the battery device 104 from providing power to avoid damage or danger to the battery device 104.

[0050] The fuse 120 is coupled between the battery pack 110 and the charging transistor 116, and the fuse 120 serves as a second protection for the battery device 104. For example, when the management chip 112 detects that the charging transistor 116 and the discharging transistor 118 fail and cannot be turned off to stop the battery device 104 from providing power, the management chip 112 instructs to disconnect the fuse 120, so that the battery device 104 stops providing power.

[0051] In the embodiment of the present disclosure, the battery device 104 further includes a plurality of pins. Figure 2 As shown, the battery device 104 further includes a clock pin SMBus_Clock, a data pin SMBus_Data, an identification pin Battery_ID, and an identification pin System_ID. The battery device 104 can communicate with the processor 102 of the charging device 100 through the clock pin SMBus_Clock and the data pin SMBus_Data. The identification pin Battery_ID allows the charging device 100 to which the battery device 104 provides power to identify the battery device 104. The identification pin System_ID allows the battery device 104 to identify the charging device 100 to which the battery device 104 provides power.

[0052] The present disclosure can use the charging device 100 and the battery device 104 as a battery cycle charging device to perform a battery cycle charging method to increase the number of charge and discharge times of the battery device 104 to extend the life of the battery device 104. Specifically, the charging device 100 can first charge the battery device 104 with a fixed current in a fixed current mode. After charging the battery device 104 to 70% of the maximum power of the battery device 104, the charging device 100 switches to a fixed voltage mode to charge the battery device 104 with a fixed voltage. In some embodiments, this charging method can be referred to as a constant current / constant voltage (CC-CV) charging method. In this way, this charging method can not only reduce the charging time by charging with a fixed current, but also prevent the battery device 104 from being overcharged by charging with a fixed voltage. In some embodiments, when the battery device 104 is fully charged, the charging device 100 switches to a floating charge mode to keep the battery device 104 in a fully charged state with a lower fixed voltage.

[0053] The following table analyzes various commonly used lithium-ion battery cells to determine the charging voltage of the charging device 100 in the fixed voltage mode.

[0054]

[0055] The table above shows 8 commonly used lithium-ion battery cells, of which there are 5 lithium cobalt oxide (LCO) battery cells and 3 nickel cobalt manganese (NCM) lithium battery cells (which can be called ternary battery cells) according to the material of the positive electrode. As shown in the table above, it can be known that the lowest charging voltage of the commonly used lithium-ion battery cells is 4.3V. Therefore, in the embodiment of the present disclosure, the charging device 100 is set to use a charging voltage of 4.2V per battery cell in a fixed voltage mode to be suitable for commonly used lithium-ion battery cells. In addition, charging with a lower charging voltage can avoid overcharging of the battery device or minimize damage to the battery device caused by charging to extend the life of the battery device.

[0056] Next, the fixed charging current and charging time used by the charging device 100 in the fixed current mode are determined. In the embodiment of the present disclosure, in order to avoid overcharging of the battery device or minimize the damage to the battery device 104 (specifically, the battery cell 122) caused by charging, the charging device 100 charges the battery device 104 at a 0.8C charge / discharge rate (C-rate) in the fixed current mode. 1C means that the battery device is fully charged / discharged within 1 hour, and 2C means that the battery device is fully charged / discharged within 0.5 hours. For example, a battery device with a maximum capacity of 3000mAh means that if the battery device is charged at 3A from zero power, it can be charged for 1 hour. If the charging current is 3A, it means charging at 1C, and if the charging current is 6A, it means charging at 2C.

[0057] In the embodiment of the present disclosure, the battery voltage of each battery cell 122 when fully charged is 4.2 V, and the battery voltage when discharged is 3 V. In order to avoid overcharging of the battery device or minimize the damage of charging to the battery device 104 (specifically, the battery cell 122), the charging device 100 charges the battery device 104 to 70% of the maximum power of the battery device 104 at a fixed current in the fixed current mode, as described above.

[0058] The following table shows the time required for each battery cell 122 of the battery device 104 of the embodiment of the present disclosure to be charged to 70% of the maximum power under different voltage ranges.

[0059]

[0060]

[0061] In the embodiment of the present disclosure, the charging device 100 includes a mapping table of multiple voltage ranges and charging times corresponding to the voltage ranges as shown in the table above. When the processor 102 of the charging device 100 detects and determines that the current voltage per battery cell of the battery cell 122 in the battery device 104 is in one of the multiple voltage ranges as shown in the table above, the processor 102 then controls the charging device 100 to use a fixed current (0.8C charge and discharge rate, as described above) to charge the battery cell 122 in the battery device 104 for a corresponding charging time. For example, when the processor 102 of the charging device 100 detects that the current voltage per battery cell of the battery cell 122 is 3.6V, the processor 102 can know that 3.6V is in the range of 3.5V to 3.7V according to the mapping table (as shown in the table above), and therefore uses a fixed current to charge the battery cell 122 in the battery device 104 for a corresponding charging time (i.e., about 30 minutes).

[0062] Figure 3 The graph shows a battery device 104 with a maximum capacity of 2200 mAh being charged from a voltage of 3 V and a capacity of 0 mAh. Figure 3 As shown, curve 302 represents the power of the battery device 104, curve 304 represents the voltage per battery cell of the battery cell 122 of the battery device 104, and curve 304 represents the charging current. As shown in curve 304, since the battery device 104 starts to charge from a voltage per battery cell of 3V, according to the above table, it can be known that 3V is in the range of less than or equal to 3.0V, it can be known that the charging device 100 first charges the battery device 104 with a fixed current for about 60 minutes to charge the battery device 104 to 70% of the maximum power of the battery device 104. In addition, as described above, the charging device 100 charges the battery device 104 at a 0.8C charge and discharge rate (C-rate) in the fixed current mode. Therefore, in Figure 3 , curve 304 (charging current) shows that the charging device 100 charges the battery device 104 at a fixed current of 1750 mA (2200×0.8) for about 60 minutes. Curve 302 shows that when the battery device 104 is charged for about 60 minutes, the power of the battery device 104 increases from 0 mAh to 1550 mAh, which is about 70% (1550 / 2200×100%) of the maximum power of the battery device 104. In addition, curve 304 shows that when the battery device 104 is charged for about 60 minutes, the voltage per battery cell of the battery device 104 increases from 3 V to about 4.2 V.

[0063] like Figure 3 As shown, after the charging device 100 charges the battery device 104 in the fixed current mode, the charging device 100 charges the battery device 104 in the fixed voltage mode. In the embodiment of the present disclosure, the charging device 100 uses a charging voltage of 4.2V per battery cell in the fixed voltage mode. Therefore, curve 304 shows that the voltage per battery cell of the battery device 104 is stabilized at about 4.2V. Curve 302 shows that the battery device 104 reaches about 2200mAh when charging the battery device 104 for about 180 minutes. In addition, curve 306 shows that the charging current continues to decrease, thereby reducing the damage to the battery device 104 caused by charging.

[0064] Figure 4A schematic diagram of various series-parallel combinations of battery cells of a battery device is shown according to an embodiment of the present disclosure. As described above, the charging device 100 charges the battery device 104 at a 0.8C charge and discharge rate in a fixed current mode, and after charging the battery device 104 to 70% of the maximum charge of the battery device 104, the charging device 100 charges the battery device 104 at a charging voltage of 4.2V per battery cell in a fixed voltage mode. Therefore, the fixed current and fixed voltage used by the charging device 100 are different according to the various series-parallel combinations of the battery cells 122 in the battery pack 110 of the battery device 104. Figure 4 Four battery packs 402 to 408 having different series-parallel combinations of battery cells are shown. Battery pack 402 has three battery cells 410 connected in series (3Series; 3S); battery pack 404 has three battery cells 410 connected in series / two in parallel (3Series / 2Parallel; 3S2P); battery pack 406 has four battery cells 410 connected in series (4S); and battery pack 408 has four battery cells 410 connected in series / two in parallel (4Series / 2Parallel; 4S2P).

[0065] When battery cells are connected in series, the voltage increases while the charge remains unchanged. When battery cells are connected in parallel, the charge increases while the voltage remains unchanged. Assume that single battery cell 410 has a charge of 2000mAh, battery pack 402 has a charge of 2000mAh; battery pack 404 has a charge of 4000mAh; battery pack 406 has a charge of 2000mAh; and battery pack 408 has a charge of 4000mAh. Therefore, assuming that charging device 100 charges battery packs 402 to 408 at a 0.8C charge and discharge rate in a fixed current mode, charging device 100 charges battery pack 402 at 1.6A (2000×0.8 / 1000), charges battery pack 404 at 3.2A (4000×0.8 / 1000), charges battery pack 406 at 1.6A (2000×0.8 / 1000), and charges battery pack 408 at 3.2AV (4000×0.8 / 1000). Assuming that the charging device 100 charges the battery packs 402 to 408 at a charging voltage of 4.2 V per battery cell in the fixed voltage mode, the charging device 100 charges the battery pack 402 at 12.6 V (4.2×3), charges the battery pack 404 at 12.6 V (4.2×3), charges the battery pack 406 at 16.8 V (4.2×4), and charges the battery pack 408 at 16.8 V (4.2×4).

[0066] Figure 5A and Figure 5BAccording to an embodiment of the present disclosure, a flow chart of a battery cyclic charging method 500 is shown. In operation 502, the processor 102 of the charging device 100 detects whether the battery device 104 is present. Specifically, the processor 102 of the charging device 100 detects whether the battery device 104 has been set in the charging device 100 and is to be charged. If yes, the battery cyclic charging method 500 proceeds to operation 506; if no, the battery cyclic charging method 500 proceeds to operation 504.

[0067] In operation 504, the charging device 100 does not perform the charging operation because the processor 102 of the charging device 100 detects that the battery device 104 does not exist. In operation 506, the processor 102 of the charging device 100 detects whether the current voltage of each battery cell 122 of the battery device 104 is less than 3.5V. If so, the battery cycle charging method 500 enters operation 508; if not, the battery cycle charging method 500 enters operation 510.

[0068] In operation 508, according to the mapping table in the charging device 100, the charging device 100 determines that the battery device 104 will be charged for about 40 to about 60 minutes in the fixed current mode of the charging device 100. Specifically, the processor 102 of the charging device 100 detects in operation 506 that the current voltage per battery cell of the battery cell 122 of the battery device 104 is less than 3.5V. Next, in operation 508, according to the mapping table in the charging device 100 (as shown in the table above), the processor 102 of the charging device 100 determines that the current voltage per battery cell is less than 3.5V and the charging time is about 40 to about 60 minutes. Therefore, it is determined that the charging device 100 charges the battery cell 122 of the battery device 104 in the fixed current mode using a fixed current (0.8C charge and discharge rate, as described above) for about 40 to about 60 minutes.

[0069] In operation 510, according to the mapping table in the charging device 100, the charging device 100 determines that the battery device 104 will be charged for about 10 to about 30 minutes in the fixed current mode of the charging device 100. Specifically, the processor 102 of the charging device 100 detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is greater than 3.5V in operation 506. Then, in operation 508, according to the mapping table in the charging device 100 (as shown in the table above), the processor 102 of the charging device 100 determines that the current voltage per battery cell is greater than 3.5V corresponding to a charging time of about 10 to about 30 minutes. Therefore, it is determined that the charging device 100 charges the battery cell 122 of the battery device 104 in the fixed current mode using a fixed current (0.8C charge and discharge rate, as described above) for about 40 to about 60 minutes.

[0070] In operation 512 , the processor 102 of the charging device 100 detects whether the current voltage of each battery cell of the battery cell 122 of the battery device 104 is less than 3.2 V. If so, the battery cyclic charging method 500 proceeds to operation 516 ; if not, the battery cyclic charging method 500 proceeds to operation 524 .

[0071] In operation 514 , the processor 102 of the charging device 100 detects whether the current voltage of each battery cell of the battery cell 122 of the battery device 104 is less than 4.0 V. If so, the battery cyclic charging method 500 proceeds to operation 518 ; if not, the battery cyclic charging method 500 proceeds to operation 530 .

[0072] In operation 516 , the processor 102 of the charging device 100 detects whether the current voltage of each battery cell of the battery cell 122 of the battery device 104 is less than 3.7 V. If so, the battery cyclic charging method 500 proceeds to operation 520 ; if not, the battery cyclic charging method 500 proceeds to operation 522 .

[0073] In operation 518 , the processor 102 of the charging device 100 detects whether the current voltage of each battery cell of the battery cell 122 of the battery device 104 is less than 4 V. If so, the battery cyclic charging method 500 proceeds to operation 526 ; if not, the battery cyclic charging method 500 proceeds to operation 528 .

[0074] In operation 520, according to the mapping table in the charging device 100, the charging device 100 determines that the battery device 104 will be charged for about 60 minutes in the fixed current mode of the charging device 100. Specifically, the processor 102 of the charging device 100 detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is less than or equal to 3.0V in operation 516. Therefore, the processor 102 of the charging device 100 determines that the current voltage per battery cell is in a range of less than 3.2V. According to the mapping table in the charging device 100 (as shown in the table above), the processor 102 of the charging device 100 determines that the current voltage per battery cell in the range of less than or equal to 3.0V corresponds to a charging time of about 60 minutes. Therefore, it is determined that the charging device 100 charges the battery cell 122 of the battery device 104 in the fixed current mode using a fixed current (0.8C charge and discharge rate, as described above) for about 60 minutes.

[0075] In operation 522, according to the mapping table in the charging device 100, the charging device 100 determines that the battery device 104 will be charged in the fixed current mode of the charging device 100 for about 50 minutes. Specifically, the processor 102 of the charging device 100 detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is greater than 3.0V in operation 516, and detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is less than 3.2V in operation 512. Therefore, the processor 102 of the charging device 100 determines that the current voltage per battery cell is in the range of 3.0V to 3.2V. According to the mapping table in the charging device 100 (as shown in the table above), the processor 102 of the charging device 100 determines that the current voltage per battery cell in the range of 3.0V to 3.2V corresponds to a charging time of about 50 minutes. Therefore, it is determined that the charging device 100 charges the battery cells 122 of the battery device 104 in the fixed current mode using a fixed current (0.8C charge and discharge rate, as described above) for about 50 minutes.

[0076] In operation 524, according to the mapping table in the charging device 100, the charging device 100 determines that the battery device 104 will be charged in the fixed current mode of the charging device 100 for about 40 minutes. Specifically, the processor 102 of the charging device 100 detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is greater than 3.2V in operation 512, and detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is less than 3.5V in operation 506. Therefore, the processor 102 of the charging device 100 determines that the current voltage per battery cell is in the range of 3.2V to 3.5V. According to the mapping table in the charging device 100 (as shown in the table above), the processor 102 of the charging device 100 determines that the current voltage per battery cell in the range of 3.2V to 3.5V corresponds to a charging time of about 40 minutes. Therefore, it is determined that the charging device 100 charges the battery cells 122 of the battery device 104 in the fixed current mode using a fixed current (0.8C charge and discharge rate, as described above) for about 40 minutes.

[0077] In operation 526, according to the mapping table in the charging device 100, the charging device 100 determines that the battery device 104 will be charged in the fixed current mode of the charging device 100 for about 30 minutes. Specifically, the processor 102 of the charging device 100 detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is less than 3.7V in operation 518, and detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is greater than 3.5V in operation 506. Therefore, the processor 102 of the charging device 100 determines that the current voltage per battery cell is in the range of 3.5V to 3.7V. According to the mapping table in the charging device 100 (as shown in the table above), the processor 102 of the charging device 100 determines that the current voltage per battery cell in the range of 3.5V to 3.7V corresponds to a charging time of about 30 minutes. Therefore, it is determined that the charging device 100 charges the battery cells 122 of the battery device 104 in the fixed current mode using a fixed current (0.8C charge and discharge rate, as described above) for about 30 minutes.

[0078] In operation 528, according to the mapping table in the charging device 100, the charging device 100 determines that the battery device 104 will be charged in the fixed current mode of the charging device 100 for about 20 minutes. Specifically, the processor 102 of the charging device 100 detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is greater than 3.7V in operation 518, and detects that the current voltage per battery cell of the battery cell 122 of the battery device 104 is less than 4.0V in operation 514. Therefore, the processor 102 of the charging device 100 determines that the current voltage per battery cell is in the range of 3.7V to 4.0V. According to the mapping table in the charging device 100 (as shown in the table above), the processor 102 of the charging device 100 determines that the current voltage per battery cell in the range of 3.7V to 4.0V corresponds to a charging time of about 20 minutes. Therefore, it is determined that the charging device 100 charges the battery cells 122 of the battery device 104 in the fixed current mode using a fixed current (0.8C charge and discharge rate, as described above) for about 20 minutes.

[0079] In operation 530, according to the mapping table in the charging device 100, the charging device 100 determines that the battery device 104 will be charged for about 10 minutes in the fixed current mode of the charging device 100. Specifically, the processor 102 of the charging device 100 detects in operation 514 that the current voltage per battery cell 122 of the battery device 104 is greater than 4.0V. Therefore, the processor 102 of the charging device 100 determines that the current voltage per battery cell is in a range greater than 4.0V. According to the mapping table in the charging device 100 (as shown in the table above), the processor 102 of the charging device 100 determines that the range of the current voltage per battery cell greater than 4.0V corresponds to a charging time of about 10 minutes. Therefore, it is determined that the charging device 100 charges the battery cells 122 of the battery device 104 in the fixed current mode using a fixed current (0.8C charge and discharge rate, as described above) for about 10 minutes.

[0080] After the charging device 100 charges the battery cell 122 of the battery device 104 using a fixed current in the fixed current mode in operations 520 to 530, the battery cycle charging method 500 enters operation 532. In operation 532, the processor 102 of the charging device 100 detects whether the current voltage per battery cell of the battery cell 122 of the battery device 104 is equal to 4.2V. If so, the battery cycle charging method 500 enters operation 534; if not, the battery cycle charging method 500 enters operation 536.

[0081] In operation 534, the charging device 100 charges the battery cells 122 of the battery device 104 at a fixed voltage in the fixed voltage mode. Specifically, in the disclosed embodiment, the charging device 100 charges the battery cells 122 of the battery device 104 at a charging voltage of 4.2V per battery cell in the fixed voltage mode until the battery device 104 is fully charged, as described above. In some embodiments, after the battery device 104 is fully charged, the charging device 100 switches to a floating charge mode to keep the battery device 104 at a fully charged state at a lower fixed voltage.

[0082] In operation 536, since the processor 102 of the charging device 100 detects that the current voltage of each battery cell of the battery cell 122 of the battery device 104 is equal to 4.2V, the processor 102 of the charging device 100 determines that the battery device 104 is fully charged and thus ends the charging. In some embodiments, after the battery device 104 is fully charged, the charging device 100 switches to a floating charge mode to keep the battery device 104 in a fully charged state at a lower fixed voltage.

[0083] Compared to the prior art, the embodiments of the present invention provide multiple advantages, and it should be understood that other embodiments may provide different advantages, all advantages need not be discussed here, and all embodiments have no specific advantages. By using the embodiments of the present disclosure, the device and method of the present disclosure can quickly charge the battery device and minimize the damage to the battery device during charging to extend the life of the battery device.

[0084] The foregoing text summarizes the features of many embodiments so that those skilled in the art can better understand the present disclosure from various aspects. Those skilled in the art should understand and can easily design or modify other processes and structures based on the present disclosure to achieve the same purpose and / or achieve the same advantages as the embodiments introduced herein. Those skilled in the art should also understand that these equivalent structures do not deviate from the spirit and scope of the invention of the present disclosure. Various changes, substitutions or modifications can be made to the present disclosure without departing from the spirit and scope of the invention of the present disclosure.

Claims

1. A smart battery cyclic charging method, comprising: detecting a current voltage of each battery cell of a plurality of battery cells in a battery device; According to a plurality of voltage ranges and a plurality of charging times corresponding to the voltage ranges in a mapping table, after detecting and determining that the current voltage of each battery cell falls within one of the voltage ranges, charging the battery cell using a fixed current at one of the charging times corresponding to the one of the voltage ranges; as well as The battery cells are charged using a fixed voltage.

2. The intelligent battery cyclic charging method of claim 1, wherein after charging the battery cell using the fixed current at the one of the charging times, the battery device is charged to approximately 70% of the maximum charge of the battery device.

3. The intelligent battery cyclic charging method as claimed in claim 1, wherein charging the battery cell using the fixed current is charging the battery cell at a charge-discharge rate (C-rate) of 0.

8.

4. The intelligent battery cyclic charging method as claimed in claim 1, wherein the fixed voltage is 4.2V per battery cell.

5. The intelligent battery cyclic charging method according to claim 1, wherein the voltage range includes: In the first range, the current voltage of each battery cell is less than or equal to 3V; In the second range, the current voltage of each battery cell is between 3V and 3.2V; In the third range, the current voltage of each battery cell is between 3.2V and 3.5V; In the fourth range, the current voltage of each battery cell is between 3.5V and 3.7V; In the fifth range, the current voltage of each battery cell is between 3.7V and 4V; and In the sixth range, the current voltage of each battery cell is greater than 4V.

6. The intelligent battery cyclic charging method according to claim 5, wherein the charging time corresponding to the voltage range includes: The first time corresponds to the first range and is 60 minutes; The second time corresponds to the second range and is 50 minutes; The third time corresponds to the third range and is 40 minutes; a fourth time, corresponding to the fourth range and being 30 minutes; a fifth time, corresponding to the fifth range and being 20 minutes; as well as The sixth time corresponds to the sixth range and is 10 minutes.

7. An intelligent battery cycle charging device, comprising: A battery device having a plurality of battery cells; as well as A charging device having a processor and a mapping table, and coupled to the battery cell, wherein the mapping table has multiple voltage ranges and multiple charging times corresponding to the voltage ranges, after the processor detects and determines that the current voltage of each battery cell of the battery cell falls within one of the voltage ranges, the processor controls the charging device to use a fixed current to charge the battery cell for one of the charging times corresponding to the one of the voltage ranges, and after the one of the charging times, the processor controls the charging device to charge the battery cell using a fixed voltage.

8. The intelligent battery cyclic charging device of claim 7, wherein after the processor controls the charging device to charge the battery cell using the fixed current at the one of the charging times, the battery device is charged to approximately 70% of the maximum power of the battery device.

9. The intelligent battery cyclic charging device as claimed in claim 7, wherein the charging device charges the battery cell using a 0.8 charge-discharge rate (C-rate).

10. The intelligent battery cyclic charging device as claimed in claim 7, wherein the fixed voltage is 4.2V per battery cell.

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