CN111965553B - Battery testing system and method - Google Patents
Battery testing system and method Download PDFInfo
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- CN111965553B CN111965553B CN201910418788.0A CN201910418788A CN111965553B CN 111965553 B CN111965553 B CN 111965553B CN 201910418788 A CN201910418788 A CN 201910418788A CN 111965553 B CN111965553 B CN 111965553B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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Abstract
The system can discharge the battery according to preset process step logic through the battery testing equipment in the discharging process, so that the current of the battery is controlled in the discharging process, the discharging speed of the battery is effectively improved, the testing time of the battery is shortened, the aging speed of the battery is slowed, and the precision of a battery testing result is greatly improved.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a battery test system and method.
Background
With the advent of batteries, they have many advantages such as high operating voltage, large capacity, long cycle life and no memory effect, making them widely used in life. In order to ensure the safety of the battery in the using process, the battery needs to be subjected to a strict testing process before being put into use.
Currently, the battery test mode is a complete machine test, a Micro Controller Unit (MCU) is used to charge the battery by different charging strategies, and the actual normal power consumption of the terminal is used for discharging. Taking the test battery cycle performance as an example, the charge-discharge mode of the battery can be cycled periodically until the battery capacity drops to a specified value (usually 80% of the rated capacity), and the charge-discharge times of the battery are recorded, or the residual capacity of the battery after the same cycle is compared, so as to represent the cycle performance of the test battery.
However, in the above battery test process, the discharge test time is long, and the aging of the battery is easily accelerated, so that the accuracy of the test result is lowered.
Disclosure of Invention
Therefore, it is necessary to provide a battery testing system and method for solving the technical problems of long discharge testing time, easy acceleration of battery aging and low testing result precision in the battery testing process.
In a first aspect, an embodiment of the present application provides a battery test system, where the system includes: the system comprises: the device comprises power supply equipment, battery test equipment and battery equipment, wherein the battery equipment is respectively connected with the power supply equipment and the battery test equipment;
the power supply equipment is used for charging a battery in the battery equipment;
the battery test equipment is used for controlling the battery to discharge according to preset process step logic; the process step logic is used to specify the current and duration of discharge of the battery.
In one embodiment, the system further comprises a control device, wherein the control device is respectively connected with the power supply device and the battery device;
the control equipment is used for sending a charging instruction to the power supply equipment; the charging instruction comprises a current value to be charged;
and the power supply equipment is used for charging the battery in the battery equipment according to the current value to be charged.
In one embodiment, the system further comprises a control switch;
the control equipment is further used for controlling the connection state between the battery equipment and the power supply equipment and the connection state between the battery equipment and the battery test equipment through the control switch.
In one embodiment, the control device is configured to control the control switch during charging, to turn on the connection between the battery device and the power supply device, and to turn off the connection between the battery device and the battery test device.
In one embodiment, the control device is configured to control the control switch during discharging, to turn on the connection between the battery device and the battery test device, and to turn off the connection between the battery device and the power supply device.
In one embodiment, the control device is configured to control the control switch to switch on the connection between the battery device and the battery test device and switch off the connection between the battery device and the power supply device when a charging duration reaches a preset charging duration.
In one embodiment, during the process of charging the battery by the power supply device, the battery testing device charges the battery with a constant current by the minimum current of the battery testing device.
In one embodiment, the battery test device is specifically configured to detect a charging mode of the battery, and control the battery to discharge according to the charging mode and the process step logic.
In one embodiment, if the charging mode is a non-constant voltage charging mode, the battery testing device is configured to stop charging the battery when the voltage of the battery reaches a preset threshold, and control the battery to discharge after a preset time period.
In one embodiment, if the charging mode is a constant voltage charging mode, the battery testing device is configured to stop charging the battery when the duration of the battery under the preset constant voltage reaches a preset duration, and control the battery to discharge after the preset duration is reached.
In one embodiment, the control device is further configured to adjust the charging instruction according to current battery state information of the battery.
In one embodiment, the control device is configured to determine a charging policy corresponding to current battery state information of the battery according to a mapping relationship between the battery state information and the charging policy, and adjust the charging instruction according to the charging policy corresponding to the current battery state information.
In one embodiment, the battery device comprises an electricity meter; the control device is configured to read current battery state information of the battery through the fuel gauge.
In one of the embodiments, it is characterized in that,
and the power supply equipment and the battery test equipment alternately and circularly charge and discharge the battery until reaching the preset circulating times.
In one embodiment, the control device is connected to the battery device via a two-wire synchronous serial bus.
In one embodiment, the control device is connected to the power supply device via a universal serial bus.
In a second aspect, an embodiment of the present application provides a battery testing method, where the method includes:
charging a battery in a battery device;
controlling the battery to discharge according to preset process step logic; the process step logic is used to specify the current and duration of discharge of the battery.
In one embodiment, the charging the battery in the battery device includes:
acquiring a charging instruction; the charging instruction comprises a current value to be charged;
and charging the battery equipment according to the current value to be charged.
In one embodiment, the connection state between the battery device and the power supply device and the connection state between the battery device and the battery test device are controlled by the control switch.
In one embodiment, the controlling the connection state between the battery device and the power supply device and the connection state between the battery device and the battery test device through the control switch includes:
and controlling the control switch in the charging process, conducting the connection between the battery equipment and the power supply equipment, and cutting off the connection between the battery equipment and the battery test equipment.
In one embodiment, the controlling the connection state between the battery device and the power supply device and the connection state between the battery device and the battery test device through the control switch includes:
and controlling the control switch in the discharging process, conducting the connection between the battery equipment and the battery testing equipment, and cutting off the connection between the battery equipment and the power supply equipment.
In one embodiment, the controlling the control switch during the discharging process to turn on the connection between the battery device and the battery test device and turn off the connection between the battery device and the power supply device includes:
when the charging time reaches the preset charging time, the control switch is controlled to conduct connection between the battery equipment and the battery test equipment and cut off connection between the battery equipment and the power supply equipment.
In one embodiment, during the process that the power supply device charges the battery, the battery testing device charges the battery with constant current by using the minimum current of the battery testing device.
In one embodiment, the charging mode of the battery is detected, and the battery is controlled to discharge according to the charging mode and the step logic.
In one embodiment, if the charging mode is a non-constant voltage charging mode, when the voltage of the battery reaches a preset threshold, the battery is stopped to be charged, and after a preset time period is reached, the battery is controlled to be discharged.
In one embodiment, if the charging mode is a constant voltage charging mode, when the duration of the battery under a preset constant voltage reaches a preset duration, the battery is stopped to be charged, and after the preset duration is reached, the battery is controlled to be discharged.
In one embodiment, before sending the charging instruction to the power supply device, the method includes:
and adjusting the charging instruction according to the current battery state information of the battery.
In one embodiment, the adjusting the charging instruction according to the current battery state information of the battery includes:
and determining a charging strategy corresponding to the current battery state information of the battery according to the mapping relation between the battery state information and the charging strategy, and adjusting the charging instruction according to the charging strategy corresponding to the current battery state information.
In one embodiment, the method comprises: and reading the current battery state information of the battery through the fuel gauge.
In one embodiment, the method comprises: alternately cycling the battery charge and discharge until a predetermined number of cycles is reached.
According to the battery testing system and the battery testing method, the battery equipment in the system is respectively connected with the power supply equipment and the battery testing equipment, and in the discharging process, the system can discharge the battery according to preset process step logic through the battery testing equipment, so that the current of the battery is controlled in the discharging process, the discharging speed of the battery is effectively improved, the testing time of the battery is shortened, the aging speed of the battery is slowed, and the precision of a battery testing result is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a battery test system according to an embodiment;
FIG. 2 is a schematic diagram of a battery test system according to an embodiment;
FIG. 3 is a schematic diagram of a battery test system according to an embodiment;
FIG. 4 is a schematic diagram of a battery test system according to an embodiment;
FIG. 5 is a schematic diagram of a battery test system according to an embodiment;
FIG. 6 is a schematic diagram of a battery current versus voltage according to one embodiment;
FIG. 7 is a flow chart illustrating a method for testing current according to an embodiment;
fig. 8 is a flowchart illustrating a current testing method according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.
Fig. 1 is a schematic diagram of a battery test system according to an embodiment, and as shown in fig. 1, the system includes a power supply device 10, a battery test device 11, and a battery device 12, where the battery device 12 is connected to the power supply device 10 and the battery test device 11, respectively; a power supply device 10 for charging a battery in the battery device 12; the battery test equipment 11 is used for controlling the discharge of the battery according to preset process step logic; step logic is used to specify the current and duration of discharge of the battery.
In this embodiment, the power supply device 10 includes an interface converter, which may be a separate hardware interface device, allowing the hardware or electronic interface to be connected to other hardware or electronic interfaces, or may be an information interface, which is not limited in this embodiment. The battery device 12 may be an intelligent terminal device, such as a mobile phone, a notebook computer, or a pre-established battery simulation device, which is not limited in this embodiment. The battery test device 11 may be a device for testing a series of parameters of current, voltage, capacity, cycle, life, internal resistance, etc. of the battery, such as a battery test cabinet, etc.
In the battery test system, a battery device 12 is connected to a power supply device 10 and a battery test device 11, where the power supply device 10 is configured to charge a battery in the battery device 12, and a manner and how to charge the battery by the power supply device are not limited in this embodiment, for example, the power supply device may be controlled by another controller to charge the battery, or the power supply device may automatically charge the battery after being powered on, which is not limited in this embodiment. The battery test device 11 is configured to control battery discharge according to a preset process step logic, where a current value and a discharge duration of the battery during discharge are specified in the process step logic.
Illustratively, in practical applications, the power supply device 10 charges the battery, and the battery testing device 11 starts discharging the battery after the battery is fully charged, or the battery testing device 11 automatically starts discharging the battery after detecting that the battery is fully charged. For example, referring to fig. 1, the operation process of the battery testing system may be as follows: during the charging of the battery, the power supply apparatus 10 charges the battery in the battery apparatus 12 until fully charged. In the discharging process of the battery, the battery testing device 11 starts to execute a preset discharging step logic, where the discharging step logic is a preset program stored in the battery testing device 11, and according to the preset step logic, the current of the battery testing device 11 discharging the battery can be controlled, that is, the current of the battery discharging can be preset through the step. For example, as shown in table 1 below, the preset step logic may be set aside for 5Min, then perform constant current discharge with a current of 6A, discharge for 30 minutes, and then execute the step 5Min for the next step.
TABLE 1
| Work step number | Name of work step | Time | Voltage of | Electric current |
| 1 | Lay aside | 5Min | / | / |
| 2 | Constant current discharge | 30Min | / | 6A |
| 3 | Lay aside | 5Min | / | / |
The embodiment of the application provides a battery test system, battery equipment 12 is connected with power supply unit 10, battery test equipment 11 respectively in this system, because at the in-process that discharges, this system can discharge to the battery through battery test equipment 11 according to the good step logic that sets up in advance, that is, can be according to the appropriate control battery of actual conditions at the in-process electric current size that discharges, the effectual speed that improves battery discharge, the test time of battery has been shortened, the ageing rate of battery has been slowed, the precision of battery test result has been improved greatly.
Based on the above embodiment, as shown in fig. 2, the battery test system provided in the embodiment of the present application may further include a control device, where the control device is connected to the power supply device and the battery device respectively; the control equipment is used for sending a charging instruction to the power supply equipment; the charging instruction comprises a current value to be charged; and the power supply equipment is used for charging the battery in the battery equipment according to the current value to be charged.
In this embodiment, the control device 13 has a certain control function, for example, the control device 13 may control the power supply device 10, and the control device 13 may be controlled by a Micro Control Unit (MCU), or may be controlled by a single chip, a Central Processing Unit (CPU), an FPGA, and the like, which is not limited in this embodiment. The control device 13 is configured to send a charging instruction to the power supply device 10; the charging instruction comprises a current value to be charged; the above power supply device 10 charges the battery in the battery device according to the current value to be charged. In practical applications, the control device 13 may control the power supply device 10 to charge the battery according to the charging instruction, and the power supply device 10 charges the battery in the battery device 12 according to the charging instruction until the battery is fully charged, so as to ensure controllability of the charging current when the power supply device charges the battery.
If the battery device 12 is an intelligent terminal device, the control device may be a processor integrated in the intelligent terminal device, or may be a device with a processing function, such as a separately provided processor, a micro control unit, or the like, and the setting manner of the control device is not particularly limited in this embodiment.
Alternatively, the control device 13 is connected to the battery device 12 via a two-wire synchronous serial bus. Illustratively, the control device 13 is an MCU, the MCU is connected to the battery device 12 through the I2C, and the power supply device 10 is connected to the MCU through a type or USB data line. It should be further noted that the connections between the control device 13 and the power supply device 10 and the battery device 12 belong to communication connections, and data interaction is possible, and the connections between the battery device 12 and the power supply device 10 and the battery test device 11 belong to electrical connections, so as to realize charging of the battery by the power supply device 10 and discharging of the battery by the battery test device 11.
In the above embodiment, a plurality of connection manners may be adopted between the battery device 12 and the power supply device 10, and between the battery device 12 and the battery test device 11, and the control manner of the charging and discharging process is different in different connection manners, for example, when the battery device 12 is connected to the power supply device 10, the battery device 12 is disconnected from the battery test device 11; or when the battery equipment 12 is disconnected from the power supply equipment 10, the battery equipment 12 is connected with the battery test equipment 11; alternatively, the battery device 12 is connected to both the power supply device 10 and the battery test device 11 at the same time. The embodiments of the present application will explain the above two cases in detail by the following embodiments of fig. 3 to 6.
Based on the battery test system of the embodiment of fig. 2, the control device 13 may control the connection state between the battery device 12 and the power supply device 10 and the battery test device 11 through a switch, as shown in fig. 3, where the battery test system further includes a control switch 14; the control device 13 is also used to control the connection state between the battery device 12 and the power supply device 10, and the connection state between the battery device 12 and the battery test device 11 through the control switch 14.
In this embodiment, the control switch 14 may be a MOS transistor, and certainly may be another switch, as long as the same function as the control switch 14 can be achieved, which is not limited to this, where the state of the control switch 14 is controlled by the control device 13, that is, the control device 13 controls the connection state between the battery device 12 and the power supply device 10 and the connection state between the battery device 12 and the battery test device 11 through the control switch 14. The scheme of the present embodiment is described in detail in the following manner one and manner two, respectively.
First, the control device 13 is used to control the control switch 14 during the charging process, to turn on the connection between the battery device 12 and the power supply device 10, and to turn off the connection between the battery device 12 and the battery test device 11.
In this embodiment, when the battery testing system executes a process of charging the battery, the control device 13 turns on the connection between the battery device 12 and the power supply device 10 through the control switch 14, and cuts off the connection between the battery device 12 and the battery testing device 11, so that after the control device 13 sends a charging instruction to the power supply device 10, the power supply device 10 can directly charge the battery, and is currently in the charging process, and the connection between the battery device 12 and the battery testing device 11 is cut off without the operation of the battery testing device 11. In this way, in the process of charging the battery, the power supply device 10 charges the battery, and the battery test device 11 is cut off, so that the influence of the battery test device 11 on the charging can be avoided, the test result is more prepared, and in addition, when the power supply device 10 works, the battery test device 11 is cut off, so that the resource can be saved.
In the second mode, the control device 13 is used for controlling the control switch 14 during the discharging process, so as to turn on the connection between the battery device 12 and the battery testing device 11 and turn off the connection between the battery device 12 and the power supply device 10.
In this embodiment, when the battery test system executes a test process of discharging the battery, the control device 13 turns on the connection between the battery device 12 and the battery test device 11 through the control switch 14, and cuts off the connection between the battery device 12 and the power supply device 10, so that the battery test device 11 can directly discharge the battery, and is currently in the discharge process, and the connection between the battery device 12 and the power supply device 10 is cut off without the power supply device 10 operating. In the same way, in the battery discharging process, the battery test cabinet discharges the battery, the power supply equipment 10 is cut off, the influence of the power supply equipment 10 on the discharging can be avoided, the test result is more prepared, and in addition, when the battery test equipment 11 works, the power supply equipment 10 is cut off, so that the resources can be saved.
Optionally, the control device 13 is configured to control the control switch 14 to turn on the connection between the battery device 12 and the battery test device 11 and turn off the connection between the battery device 12 and the power supply device 10 when the charging duration reaches the preset charging duration.
Wherein, the control device 13 switches from the charging process to the discharging process, that is, switches from the connection between the battery device 12 and the power supply device 10 to the connection between the battery device 12 and the battery test device 11, and when the required battery charging time reaches the preset charging time, the control device 13 controls the control switch 14 to execute the connection switching action. The preset charging time period represents a preset maximum time period for which the battery needs to be charged, and the specific time period value is not limited in the embodiment and can be determined according to actual conditions.
Exemplarily, the control device 13 is set to be an MCU, the battery test device 11 is a battery test cabinet, the control switch 14 is an MOS transistor, and is integrated in the MCU, as shown in fig. 4, during the charging process, the MCU controls the MOS transistor to conduct the connection between the power supply device 10 and the battery device 12, and sends a charging instruction to the power supply device 10, so as to implement that the power supply device 10 charges the battery. In the discharging process, the MCU controls the MOS transistor to turn on the connection between the battery test device 11 and the battery device 12, so that the battery test device 11 automatically discharges the battery according to the preset process step logic.
The battery test system provided by this embodiment, because the control device 13 can control the connection state between the battery device 12 and the power supply device 10 through the control switch 14, and the connection state between the battery device 12 and the battery test device 11, and different connection states correspond to the charging or discharging processes of the battery respectively, thus, the switching of the charging and discharging processes of the battery is realized through the control switch 14, the cycle test function of the battery is completed, the charging of the battery by the power supply device 10 is not affected, the discharging of the battery by the battery test device 11 is also not affected, and the discharging current of the battery in the discharging process of the battery test device 11 is greatly facilitated.
Also, based on the battery test system in the embodiment of fig. 2, the embodiment of the present application further provides a battery test system, where the control switch 14 is not needed in the battery test system, that is, the battery device 12 is connected to both the power supply device 10 and the battery test device 11. Optionally, the battery test device 11 charges the battery with a constant current at the minimum current of the battery test device when the battery test device 11 detects that the power supply device 10 charges the battery.
For example, if the control device 13 is set as an MCU and the battery test device 11 is set as a battery test cabinet, as shown in fig. 5, during the charging process, the MCU sends a charging instruction to the power supply device 10 to charge the battery by the power supply device 10. During the discharging process, the MCU sends a charging stop instruction to the power supply device 10, so that the power supply device 10 stops charging the battery, and meanwhile, the battery test device 11 automatically switches to the discharging mode to discharge the battery according to the preset process step logic.
In this embodiment, no matter in the charging process or the discharging process of the battery, the power supply device 10 and the battery test device 11 are both connected to the battery device 12, and in practical applications, when the battery test device 11 detects that the power supply device 10 charges the battery, the battery test device 11 also performs constant current charging by using the minimum precision current of the battery test device 11 as lithium ions, for example, the minimum precision current value of the battery test device 11 is 5mA, and the battery test device 11 also supplies power to the battery by using the current of 5mA while the power supply device 10 supplies power to the battery, and since the current provided by the battery test device 11 is small, the problem that the current of the battery is too large in the charging process is not affected. Thus, the battery test apparatus 11 can monitor the state of the battery, such as the current, the quantity of electricity, the voltage, etc., in real time.
During the process that the battery testing device 11 charges the battery all the time, after the battery is fully charged, the battery testing device 11 is switched from the charging state to the discharging state, and the power supply device 10 charges the battery in different ways and in different corresponding switching discharging modes. In one embodiment, the battery test equipment 11, specifically for detecting the charging mode of the battery, discharges the battery according to the charging mode and the process step logic. Optionally, if the charging mode is a non-constant voltage charging mode, the battery testing device 11 is specifically configured to stop charging the battery by the battery testing device when the voltage of the battery reaches a preset threshold, and control the battery to discharge after a preset time period. Optionally, if the charging mode is a constant voltage charging mode, the battery testing device 11 is specifically configured to stop charging the battery when the duration of the battery under the preset constant voltage reaches the preset duration, and control the battery to discharge after the preset duration is reached.
In this embodiment, the battery testing device 11 detects a charging mode of the battery, and discharges the battery according to the determined charging mode and the preset process step logic, wherein if the charging mode is a non-constant voltage charging mode, the battery testing device 11 switches to a resting process step according to the preset process step logic when the voltage of the battery reaches a preset threshold, that is, stops charging the battery, and discharges the battery after the resting process step is finished; if the charging mode is constant voltage charging, the battery testing device 11 firstly switches to the shelving step according to the preset step logic when the duration of the battery under the preset constant voltage reaches the preset duration, namely, the battery charging is stopped, and the battery is discharged after the shelving step is finished. It should be noted that, in the above two modes, the lengths of the rest steps for switching the battery test equipment 11 may be equal or different, specifically based on actual conditions. It is understood that when the battery test device 11 switches from the charging mode to the discharging mode, it is necessary for the power supply device 10 to stop operating, wherein the stop of the power supply device 10 may be performed by an instruction sent by the control device 13.
According to the battery testing system provided by the embodiment, because the battery testing equipment 11 stops charging the battery, and after the preset time is reached, the battery is automatically controlled to discharge, namely, the charging and discharging mode does not need to be switched through the control switch 14 in the additional control equipment 13, only the charging and discharging flow of the battery testing equipment 11 needs to be started, the whole program can automatically run, and the intelligence and the speed of the whole battery testing process are greatly improved.
With reference to all the above embodiments, it is understood that, in the charging process, the magnitude of the current or voltage for the power supply device 10 to charge the battery, and the start or stop of the power supply device 10 to charge the battery are based on the charging instruction sent by the control device 13, and then the control device 13 needs to adjust the content of the charging instruction in real time in the whole charging process. Optionally, the control device 13 is specifically configured to determine a charging policy corresponding to current battery state information of the battery according to a mapping relationship between the battery state information and the charging policy, and adjust the charging instruction according to the charging policy corresponding to the current battery state information. Alternatively, the battery device 12 includes an electricity meter; the control device 13 is adapted to read the current battery status information of the battery by means of the fuel gauge.
In this embodiment, the control device 13 adjusts the charging instruction according to the current battery state information of the battery, where the current battery state information represents parameter information such as the voltage, the current, or the electric quantity of the current battery. Specifically, the control device 13 may obtain the current battery state information of the battery through a fuel gauge on the battery device 12, and then the control device 13 determines the charging policy corresponding to the current battery state information of the battery according to a mapping relationship between the pre-stored battery state information and the charging policy, for example, if the current battery does not reach 4.2V, the corresponding charging policy may be to charge the battery with a current of 5A. Alternatively, the control device 13 may adjust the corresponding charging strategy according to the electric quantity of the battery, and when detecting that the total capacity value of the battery changes from Q1 to Q2, adjust the charging current in the charging strategy to switch from a × Q1 to a × Q2. The mapping relationship between the pre-stored battery state information and the charging policy is not limited in this embodiment, and may be determined according to actual situations. Based on the charging policy determined by the control device 13, the control device 13 adjusts each parameter in the charging instruction and transmits the charging instruction to the power supply device 10 so that the power supply device 10 charges the battery with the matched parameter. It is understood that the charging command issued by the control device 13 is adjusted in real time during the charging process, that is, the power supply device 10 adjusts the magnitude of the charging parameter of the battery in real time, for example, as shown in fig. 6, for the voltage-current relationship during the charging process of the battery, the power supply device 10 is configured to first charge the battery with the current of 5A during the charging process, and when the voltage reaches 4.2V, the battery is continuously charged with the current of 3A according to the charging command until the voltage of the battery reaches 4.4V.
Optionally, an embodiment of the present application further provides a battery test system, where the power supply device and the battery test device alternately cycle to charge and discharge the battery until a preset cycle number is reached.
The embodiment of the application provides a charging and discharging scene during battery testing, and in practical application, the cycle of the process of charging and discharging the battery can be realized, and the number of the cycle can be determined according to the actual situation, for example, the charging process can be executed once, and then the discharging process is executed once, the whole testing process is finished without the need of recycling the secondary charging and discharging process. For example, if in practical application, a second charging-discharging process needs to be performed, in the process of controlling the battery to discharge by the battery testing device, the control device starts to send a charging instruction to the power supply device when detecting that the current voltage reaches the minimum threshold value, so that the power supply device starts to charge the battery.
In addition, an embodiment of the present application further provides a battery testing method, as shown in fig. 7, the method includes:
s101, charging a battery in the battery device.
S102, controlling the battery to discharge according to preset process step logic; step logic is used to specify the current and duration of discharge of the battery.
The implementation principle and technical effect of the battery testing method provided by the embodiment are similar to those of the system embodiment, and are not described herein again.
According to the battery testing method provided by the embodiment of the application, the power supply equipment charges the battery in the battery equipment, and the battery testing equipment controls the battery to discharge according to preset step logic, wherein the step logic is used for specifying the current and the time length of battery discharge. In the discharging process, the battery testing equipment can discharge the battery according to the preset process step logic, namely, the current of the battery in the discharging process can be properly controlled according to the actual condition, so that the discharging speed of the battery is effectively improved, the testing time of the battery is shortened, the aging speed of the battery is slowed, and the precision of the battery testing result is greatly improved.
In one embodiment, the present application provides a battery testing method, as shown in fig. 8, where the step S101 includes:
s201, acquiring a charging instruction; the charging instruction includes a current value to be charged.
And S202, charging the battery equipment according to the current value to be charged.
The implementation principle and technical effect of the battery testing method provided by the embodiment are similar to those of the system embodiment, and are not described herein again.
In one embodiment, the present application provides a battery testing method, where the method further includes:
and controlling the connection state between the battery equipment and the power supply equipment and the connection state between the battery equipment and the battery test equipment through the control switch.
In one embodiment, the present application provides a battery testing method, and the selectable modes of controlling the connection state between the battery device and the power supply device through the control switch and the connection state between the battery device and the battery testing device include two modes:
the first method is as follows: and controlling the control switch in the charging process, conducting the connection between the battery equipment and the power supply equipment, and cutting off the connection between the battery equipment and the battery test equipment.
The second method comprises the following steps: and controlling the control switch in the discharging process, conducting the connection between the battery equipment and the battery testing equipment, and cutting off the connection between the battery equipment and the power supply equipment.
In one embodiment, an embodiment of the present application provides a battery testing method, where the second method includes: when the charging time reaches the preset charging time, the control switch is controlled to conduct the connection between the battery equipment and the battery test equipment and cut off the connection between the battery equipment and the power supply equipment.
In one embodiment, the present application provides a battery testing method, which further includes: in the process that the power supply equipment charges the battery, the battery testing equipment charges the battery with constant current by using the minimum current of the battery testing equipment.
In one embodiment, the present application provides a battery testing method, which further includes: and detecting the charging mode of the battery, and logically controlling the battery to discharge according to the charging mode and the process step.
In one embodiment, an embodiment of the present application provides a battery testing method, where the detecting a charging mode of a battery and controlling battery discharge according to the charging mode and process step logic includes: and if the charging mode is a non-constant voltage charging mode, stopping charging the battery when the voltage of the battery reaches a preset threshold value, and controlling the battery to discharge after a preset time length is reached.
In one embodiment, an embodiment of the present application provides a battery testing method, where the detecting a charging mode of a battery and controlling battery discharge according to the charging mode and process step logic includes: if the charging mode is a constant voltage charging mode, stopping charging the battery when the duration of the battery under the preset constant voltage reaches the preset duration, and controlling the battery to discharge after the preset duration is reached.
In one embodiment, the present application provides a battery testing method, including: and adjusting the charging instruction according to the current battery state information of the battery.
In one embodiment, an embodiment of the present application provides a battery testing method, where adjusting the charging instruction according to current battery state information of the battery includes:
and determining a charging strategy corresponding to the current battery state information of the battery according to the mapping relation between the battery state information and the charging strategy, and adjusting the charging instruction according to the charging strategy corresponding to the current battery state information.
In one embodiment, the present application provides a battery testing method, including: and reading the current battery state information of the battery through the fuel gauge.
In one embodiment, the present application provides a battery testing method, which further includes: the battery is alternately charged and discharged in cycles until a predetermined number of cycles is reached.
The implementation principle and technical effect of the battery testing method provided by all the embodiments are similar to those of the system embodiments, and are not described herein again.
It should be understood that, although the steps in the flowcharts of fig. 7 and 8 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 7 and 8 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (28)
1. A battery test system, the system comprising: the device comprises power supply equipment, battery test equipment and battery equipment, wherein the battery equipment is respectively connected with the power supply equipment and the battery test equipment;
the power supply equipment is used for charging a battery in the battery equipment;
the battery testing equipment is used for charging the battery with constant current by taking the minimum current of the battery testing equipment as the battery in the process of charging the battery by the power supply equipment so as to monitor the state of the battery; and under the condition of switching to the battery discharge mode according to the state of the battery, controlling the battery to discharge according to preset process step logic; the process step logic is used to specify the current and duration of discharge of the battery.
2. The system according to claim 1, further comprising a control device connected to the power supply device and the battery device, respectively;
the control equipment is used for sending a charging instruction to the power supply equipment; the charging instruction comprises a current value to be charged;
and the power supply equipment is used for charging the battery in the battery equipment according to the current value to be charged.
3. The system of claim 2, further comprising a control switch;
the control equipment is also used for controlling the connection state between the battery equipment and the power supply equipment through the control switch.
4. The system of claim 3, wherein the control device is configured to control the control switch to conduct the connection between the battery device and the power supply device during charging.
5. The system of claim 3, wherein the control device is configured to control the control switch to disconnect the battery device from the power supply device during discharging.
6. The system according to claim 5, wherein the control device is configured to control the control switch to switch on the connection between the battery device and the battery test device and switch off the connection between the battery device and the power supply device when a charging duration reaches a preset charging duration.
7. The system of claim 1, wherein the battery test device is configured to detect a charging mode of the battery, and to control the battery to discharge according to the charging mode and the step logic.
8. The system of claim 7, wherein if the charging mode is a non-constant voltage charging mode, the battery testing device is configured to stop charging the battery when the voltage of the battery reaches a preset threshold, and to control the battery to discharge after a preset time period.
9. The system of claim 7, wherein if the charging mode is a constant voltage charging mode, the battery testing device is configured to stop charging the battery when the duration of the battery under the preset constant voltage reaches a preset duration, and control the battery to discharge after the preset duration is reached.
10. The system of claim 2, wherein the control device is further configured to adjust the charging instruction according to current battery status information of the battery.
11. The system according to claim 10, wherein the control device is configured to determine a charging policy corresponding to current battery state information of the battery according to a mapping relationship between the battery state information and the charging policy, and adjust the charging instruction according to the charging policy corresponding to the current battery state information.
12. The system of claim 10 or 11, wherein the battery device comprises an electricity meter; the control device is configured to read current battery state information of the battery through the fuel gauge.
13. The system according to any one of claims 1 to 6,
and the power supply equipment and the battery test equipment alternately and circularly charge and discharge the battery until reaching the preset circulating times.
14. The system of claim 2, wherein the control device is connected to the battery device via a two-wire synchronous serial bus.
15. The system of claim 14, wherein the control device is connected to the power supply device via a universal serial bus.
16. A method for testing a battery, the method comprising:
charging a battery in a battery device;
in the process of charging the battery, constant-current charging is carried out on the battery by using a preset extra minimum current so as to monitor the state of the battery, and the battery is controlled to discharge according to preset process step logic under the condition that the battery is switched to a discharging mode according to the state of the battery; the process step logic is used to specify the current and duration of discharge of the battery.
17. The method of claim 16, wherein charging the battery in the battery device comprises:
acquiring a charging instruction; the charging instruction comprises a current value to be charged;
and charging the battery equipment according to the current value to be charged.
18. The method of claim 17, further comprising:
and controlling the connection state between the battery equipment and the power supply equipment through a control switch.
19. The method of claim 18, wherein the controlling the connection state between the battery device and the power supply device via the control switch comprises:
and controlling the control switch in a charging process to conduct the connection between the battery equipment and the power supply equipment.
20. The method of claim 18, wherein the controlling the connection state between the battery device and the power supply device via the control switch comprises:
and controlling the control switch in the discharging process to cut off the connection between the battery equipment and the power supply equipment.
21. The method of claim 20, wherein said controlling the control switch to disconnect the battery device from the power supply device during discharging comprises:
when the charging time reaches the preset charging time, the control switch is controlled to cut off the connection between the battery equipment and the power supply equipment.
22. The method of claim 16, wherein a charge pattern of the battery is detected, and the battery is controlled to discharge based on the charge pattern and the process step logic.
23. The method of claim 22, wherein if the charging mode is a non-constant voltage charging mode, the charging of the battery is stopped when the voltage of the battery reaches a preset threshold, and the battery is controlled to discharge after a preset time period.
24. The method as claimed in claim 22, wherein if the charging mode is a constant voltage charging mode, the charging of the battery is stopped when the duration of the battery at the preset constant voltage reaches a preset duration, and the battery is controlled to discharge after the preset duration is reached.
25. The method of any of claims 17-21, wherein prior to obtaining the charging instruction, the method comprises:
and adjusting the charging instruction according to the current battery state information of the battery.
26. The method of claim 25, wherein said adjusting the charging instruction according to the current battery state information of the battery comprises:
and determining a charging strategy corresponding to the current battery state information of the battery according to the mapping relation between the battery state information and the charging strategy, and adjusting the charging instruction according to the charging strategy corresponding to the current battery state information.
27. The method of claim 26, wherein the method comprises: and reading the current battery state information of the battery through an electricity meter.
28. The method according to any one of claims 17-24, wherein the method comprises: alternately cycling the battery charge and discharge until a predetermined number of cycles is reached.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910418788.0A CN111965553B (en) | 2019-05-20 | 2019-05-20 | Battery testing system and method |
| PCT/CN2020/090841 WO2020233544A1 (en) | 2019-05-20 | 2020-05-18 | Battery test system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910418788.0A CN111965553B (en) | 2019-05-20 | 2019-05-20 | Battery testing system and method |
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| CN111965553B true CN111965553B (en) | 2021-10-01 |
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| CN102759712A (en) * | 2011-04-29 | 2012-10-31 | 比亚迪股份有限公司 | Battery testing device and testing method thereof |
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| WO2020233544A1 (en) | 2020-11-26 |
| CN111965553A (en) | 2020-11-20 |
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