Battery intelligent charging control method and system and charging equipment

Abstract

The invention relates to the technical field of rechargeable batteries, in particular to an intelligent battery charging control method and system and charging equipment, and the method comprises the steps: configuring charging voltage and charging current; monitoring whether the voltage of the battery cell rises to the maximum voltage or not; if the voltage rises to the maximum voltage, reducing the charging current until the battery cell voltage drops to the standard voltage, and then recovering the rated current; monitoring the temperature of the battery cell and the temperature of the PCBA; judging whether the battery cell temperature or the PCBA temperature rises to a preset threshold value or not; if the current rises to the preset threshold value, the current is reduced to the battery cell temperature or the PCBA temperature is recovered to the normal temperature, and then the rated current is recovered. The charging current is actively reduced for three times when the voltage is increased to the maximum charging voltage, and charging is stopped until the maximum voltage of the battery cell is completely stabilized and the capacity is fully charged. The charging current is dynamically adjusted in real time, and the voltage, the input current and the cell temperature of the cell end are monitored in real time through a hardware circuit, so that the problems of slow charging and unsafety are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of rechargeable batteries, and in particular to a battery intelligent charging control method, system and charging equipment. Background Art

[0002] There are several charging control schemes available: no temperature data feedback, charging with a lower current, and no control over the cell temperature during the charging process; temperature data feedback, the upper temperature limit is higher than the temperature range recommended in the cell specification, or the upper temperature limit meets the cell specification, the current is reduced when the temperature rises, and the current is no longer increased when the temperature drops, and it cannot be adjusted dynamically in real time; when there is cell voltage data feedback, the charging IC only adjusts the charging current according to a fixed configuration. The above charging methods result in slow charging speed, accelerated cell aging, partial false electricity after the cell is fully charged, and safety issues such as burning the battery shell when the ambient temperature is high. Summary of the invention

[0003] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a battery intelligent charging control method, comprising the following steps: Step 1: Configure charging voltage and charging current; Step 2: Monitor whether the cell voltage rises to the maximum voltage for the first time; Step 3: If the cell voltage rises to the maximum voltage for the first time, reduce the charging current until the cell voltage drops to the standard voltage and then resume the rated current; Step 4: Monitor the battery cell temperature and PCBA temperature; Step 5: Determine whether the battery cell temperature or PCBA temperature rises to a predetermined threshold; Step 6: If the cell temperature or PCBA temperature rises to a predetermined threshold, reduce the current until the cell temperature or PCBA temperature returns to normal and then restore the rated current.

[0004] Furthermore, step three specifically includes: if the battery cell voltage rises to the maximum voltage for the first time, the charging current is reduced for the first time; if the battery cell voltage rises to the maximum voltage for the second time, the charging current is reduced for the second time; if the battery cell voltage rises to the maximum voltage for the third time, the charging current is reduced for the third time until the battery cell voltage drops to the standard voltage and then the rated current is restored.

[0005] Furthermore, step six specifically includes: monitoring the battery cell temperature and PCBA temperature, and when the current charging current is greater than the first level current charging, determining whether the battery cell temperature or PCBA temperature rises to the first level temperature; if the battery cell temperature or PCBA temperature rises to the first level temperature, reducing the current to the first level current; determining whether the battery cell temperature or PCBA temperature rises to the second level temperature; if the battery cell temperature or PCBA temperature rises to the second level temperature, reducing the current to the second level current until the battery cell temperature or PCBA temperature returns to normal temperature and then restoring the rated current.

[0006] Furthermore, the second level current is smaller than the current charging current.

[0007] Furthermore, the charging control method further comprises the following steps: determining whether the temperature or current of the cell terminal exceeds the first level protection range; if the temperature or current of the cell terminal exceeds the first level protection range, shutting down the cell terminal charging bus, shutting down the charging IC, and the charging input bus; Determine whether the temperature or current at the cell end exceeds the secondary protection range; if the temperature or current at the cell end exceeds the secondary protection range, the fuse is blown and the operation is terminated; If the battery cell temperature or current does not exceed the secondary protection range and the battery cell temperature or current returns to normal, charging is resumed.

[0008] Furthermore, the charging control method also includes the following steps: configuring the charging voltage and charging current, configuring the charging IC charging current to be the lowest current when the battery starts charging and linearly increasing to the maximum current within a predetermined time; when the battery cell voltage is lower than the pre-charge voltage, the maximum chargeable current is one tenth of the rated current of the battery cell; when the battery cell voltage is higher than the pre-charge voltage, the maximum chargeable current is the rated current of the battery cell.

[0009] The present invention also proposes a battery intelligent charging control system, comprising: Main control MCU module, used to configure charging voltage and current; A charging IC module is used to adjust the charging current when the battery cell voltage or battery cell temperature exceeds a preset threshold; A bus switch module is used to switch the cell-end charging bus, charging IC module, and charging input bus when the cell-end temperature or current exceeds a predetermined threshold; Voltage monitoring module, used to monitor the cell voltage in real time and determine the changes in the cell voltage; Temperature monitoring module, used to monitor the battery cell temperature and PCBA temperature, and determine whether the temperature reaches the preset temperature threshold; The protection module is used to take protective measures when the temperature and current at the battery cell end exceed the secondary protection range.

[0010] Furthermore, the bus switch module includes a charging bus switch module, which is used to turn off the charging bus at the battery cell end; and a charging input switch module, which is used to turn off the charging IC module and the charging input bus.

[0011] Furthermore, the voltage monitoring module includes a voltage sensor; the temperature monitoring module includes a battery core temperature sensor and a PCBA temperature sensor.

[0012] The present invention also proposes a battery charging device, comprising at least one port, a memory, a processor, and a control program on the memory and executable on the processor, wherein the control program implements the steps of the battery intelligent charging control method when executed by the processor.

[0013] This solution uses the rated current of the battery cell to charge. The main control MCU collects the battery cell temperature, PCBA temperature, and battery cell voltage in real time, and adjusts the charging current in real time based on the above data. The battery cell characteristics are used to shorten the charging time while ensuring safety, and the battery cell capacity is fully charged. The battery cell end adds hardware circuits and cooperates with software to monitor the voltage, current, and temperature in real time to provide two-level protection and improve battery safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic block diagram of the interconnection of the battery intelligent charging control system of the present invention; Figure 2 It is a flow chart of the battery intelligent charging control method of the present invention. DETAILED DESCRIPTION

[0015] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0017] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0018] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] The present invention provides a battery intelligent discharge control method, which is applied to rechargeable batteries, including V-mount batteries, camera batteries, N-PF batteries, power banks and other rechargeable batteries and rechargeable devices; See also Figure 1 , Figure 1 It is a schematic block diagram of the interconnection of a battery intelligent charging control system. In this embodiment, the battery intelligent charging control system includes: a main control MCU module, which is used to configure the charging voltage and current; A charging IC module is used to adjust the charging current when the battery cell voltage or battery cell temperature exceeds a preset threshold; The bus switch module includes a charging bus switch module for shutting down the cell-end charging bus; a charging input switch module for shutting down the charging IC module and the charging input bus; The voltage monitoring module includes a voltage sensor, which is used to monitor the cell voltage in real time and determine the changes in the cell voltage; The temperature monitoring module includes a battery cell temperature sensor for monitoring the battery cell temperature; the PCBA temperature sensor is used to detect the PCBA temperature and determine whether the temperature reaches a preset temperature threshold; The protection module is used to take protective measures when the temperature and current at the battery cell end exceed the secondary protection range.

[0021] See also Figure 2 , Figure 2 The present invention provides a flow chart of a battery intelligent charging control method, comprising the following steps: Configure charging voltage; Configure charging current; Monitor whether the cell voltage rises to the maximum voltage for the first time; If the cell voltage rises to the maximum voltage for the first time, the charging current is reduced for the first time; if the cell voltage rises to the maximum voltage for the second time, the charging current is reduced for the second time; if the cell voltage rises to the maximum voltage for the third time, the charging current is reduced for the third time until the cell voltage drops to the standard voltage and then the rated current is restored.

[0022] Monitor battery cell temperature and PCBA temperature; Determine whether the battery core temperature or the PCBA temperature rises to a first temperature; When the current charging current is greater than the first-level current, determine whether the battery cell temperature or PCBA temperature rises to the first-level temperature; if the battery cell temperature or PCBA temperature rises to the first-level temperature, reduce the current to the first-level current; determine whether the battery cell temperature or PCBA temperature rises to the second-level temperature; if the battery cell temperature or PCBA temperature rises to the second-level temperature, reduce the current to the second-level current until the battery cell temperature or PCBA temperature returns to normal temperature and then restores the rated current, and the second-level current is less than the current charging current.

[0023] Determine whether the temperature or current of the battery cell exceeds the first-level protection range; if the temperature or current of the battery cell exceeds the first-level protection range, shut down the battery cell charging bus, shut down the charging IC, and shut down the charging input bus; Determine whether the temperature or current at the cell end exceeds the secondary protection range; if the temperature or current at the cell end exceeds the secondary protection range, the fuse is blown and the operation is terminated; If the battery cell temperature or current does not exceed the secondary protection range and the battery cell temperature or current returns to normal, charging is resumed.

[0024] Another specific embodiment: when the battery starts charging, the charging IC is configured to have a minimum charging current and is linearly and slowly increased to the maximum chargeable current within 3 seconds (the time can be adjusted according to the actual product); when the current cell voltage is lower than the pre-charge voltage, the maximum chargeable current is one tenth of the rated current; when the cell voltage is higher than the pre-charge voltage, the maximum chargeable current is the rated current of the cell; the maximum charging voltage is the maximum voltage supported by the cell; the cell temperature, PCBA temperature, and cell voltage are monitored at the same time; the cell temperature and PCBA temperature are monitored in two levels; when the temperature reaches the first level value, the charging current is reduced to the first level current; if the temperature continues to rise to the second level value, the charging current is reduced again to the second level current; if the temperature drops to a normal range, the current is restored to the rated current of the cell; when the voltage rises to the maximum charging voltage, the charging current is actively reduced three times; after the third current reduction, charging is stopped until it is completely stable at the maximum cell voltage and the capacity is 100% full. While dynamically adjusting the charging current in real time, the software monitors the voltage, input current, and battery cell temperature at the battery cell end in real time through the hardware circuit. When the above data is in the abnormal range of the first-level protection and lasts for a certain period of time, the software will prioritize shutting off the charging current input bus through the hardware circuit, and then configure the charging IC data to shut down the charging function and the external current input to the charging management IC bus. When the above abnormalities disappear and last for a period of time, the charging function will be automatically restored. If the voltage, input current, and battery cell temperature seriously exceed the normal range and reach the range of the second-level protection, the second-level protection fuse will be triggered to blow, permanently shutting down the battery's charging and discharging functions.

[0025] The present invention also proposes a battery charging device, comprising at least one port, a memory, a processor, and a control program on the memory and executable on the processor. When the control program is executed by the processor, the steps of the battery intelligent charging control method are implemented, and therefore, at least all the beneficial effects brought about by the battery intelligent charging control method of the above-mentioned embodiment are possessed, which will not be described one by one here.

[0026] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of software functional modules.

[0027] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A battery intelligent charging control method, characterized in that: The following steps are involved: Step 1: Configure charging voltage and charging current; Step 2: Monitor whether the cell voltage rises to the maximum voltage for the first time; Step 3: If the cell voltage rises to the maximum voltage for the first time, reduce the charging current until the cell voltage drops to the standard voltage and then resume the rated current; Step 4: Monitor the battery cell temperature and PCBA temperature; Step 5: Determine whether the battery cell temperature or PCBA temperature rises to a predetermined threshold; Step 6: If the cell temperature or PCBA temperature rises to a predetermined threshold, reduce the current until the cell temperature or PCBA temperature returns to normal and then restore the rated current.

2. The charging control method according to claim 1, characterized in that: The step three specifically includes: if the cell voltage rises to the maximum voltage for the first time, reducing the charging current for the first time; if the cell voltage rises to the maximum voltage for the second time, reducing the charging current for the second time; if the cell voltage rises to the maximum voltage for the third time, reducing the charging current for the third time until the cell voltage drops to the standard voltage and then the rated current is restored.

3. The charging control method according to claim 1, characterized in that: The step six specifically includes: monitoring the battery cell temperature and the PCBA temperature, and when the current charging current is greater than the first level current charging, judging whether the battery cell temperature or the PCBA temperature rises to the first level temperature; if the battery cell temperature or the PCBA temperature rises to the first level temperature, reducing the current to the first level current; judging whether the battery cell temperature or the PCBA temperature rises to the second level temperature; if the battery cell temperature or the PCBA temperature rises to the second level temperature, reducing the current to the second level current until the battery cell temperature or the PCBA temperature returns to normal temperature and then restoring the rated current.

4. The charging control method according to claim 3, characterized in that: The second level current is smaller than the current charging current.

5. The charging control method according to claim 1, characterized in that: The charging control method further comprises the following steps: determining whether the temperature or current of the battery cell terminal exceeds the first level protection range; if the temperature or current of the battery cell terminal exceeds the first level protection range, shutting down the battery cell terminal charging bus, shutting down the charging IC, and the charging input bus; Determine whether the temperature or current at the cell end exceeds the secondary protection range; if the temperature or current at the cell end exceeds the secondary protection range, the fuse is blown and the operation is terminated; If the battery cell temperature or current does not exceed the secondary protection range and the battery cell temperature or current returns to normal, charging is resumed.

6. The charging control method according to claim 1, characterized in that: The charging control method also includes the following steps: configuring the charging voltage and charging current, configuring the charging IC charging current to be the lowest current when the battery starts charging and linearly increasing to the maximum current within a predetermined time; when the battery cell voltage is lower than the pre-charge voltage, the maximum chargeable current is one tenth of the rated current of the battery cell; when the battery cell voltage is higher than the pre-charge voltage, the maximum chargeable current is the rated current of the battery cell.

7. A battery intelligent charging control system for implementing the charging control method according to any one of claims 1 to 6, characterized in that: include: Main control MCU module, used to configure charging voltage and current; A charging IC module is used to adjust the charging current when the battery cell voltage or battery cell temperature exceeds a preset threshold; A bus switch module is used to switch the cell-end charging bus, charging IC module, and charging input bus when the cell-end temperature or current exceeds a predetermined threshold; Voltage monitoring module, used to monitor the cell voltage in real time and determine the changes in the cell voltage; Temperature monitoring module, used to monitor the battery cell temperature and PCBA temperature, and determine whether the temperature reaches the preset temperature threshold; The protection module is used to take protective measures when the temperature and current at the battery cell end exceed the secondary protection range.

8. The battery intelligent charging control system according to claim 7, characterized in that: The bus switch module includes a charging bus switch module, which is used to turn off the charging bus at the battery cell end; and a charging input switch module, which is used to turn off the charging IC module and the charging input bus.

9. The battery intelligent charging control system according to claim 7, characterized in that: The voltage monitoring module includes a voltage sensor; the temperature monitoring module includes a battery core temperature sensor and a PCBA temperature sensor.

10. A battery charging device, characterized in that: The device comprises at least one port, a memory, a processor, and a control program on the memory and executable on the processor, wherein when the control program is executed by the processor, the steps of the charging control method according to any one of claims 1 to 6 are implemented.

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