Mobile power supply with battery detection function and battery detection method

Abstract

The invention provides a mobile power supply with a battery detection function and a battery detection method. The mobile power supply comprises a main control module, a low-voltage power supply conversion module, a bidirectional DC-AC rectification inversion module, a bidirectional DC-DC isolation conversion module, a bidirectional DC-DC buck-boost conversion module, an AC power supply interface, a DC power supply interface, a battery detection control circuit and a battery module, one end of the bidirectional DC-DC buck-boost conversion module is arranged between the bidirectional DC-AC rectification inversion module and the bidirectional DC-DC isolation conversion module or between the bidirectional DC-DC isolation conversion module and the battery module, and the battery detection control circuit is connected with the DC power supply interface and is used for controlling the charging and discharging operation of an external battery. Through charging and discharging operation, dynamic internal resistance, voltage and electric quantity testing can be carried out on the battery. The invention can realize a battery test function.

Description

Technical Field

[0001] The invention relates to the technical field of mobile power supplies, in particular to a mobile power supply with a battery detection function, and also to a battery detection method using the mobile power supply. Background Art

[0002] With the popularization of automobiles, the technological development and upgrading of power tools and electric equipment, batteries are widely used as energy storage elements and key components of products. The health of batteries is the most basic condition for the reliable operation of vehicles, tools, and equipment, so battery testing and maintenance have become a well-known business content. For example, the maintenance and inspection of batteries / batteries used in automobiles are more familiar and common to everyone. It is not uncommon for automobiles to break down due to battery failure or battery power loss. Because the battery life of each vehicle varies due to different vehicle usage environments, as a user, you can have a battery testing device that can detect battery performance in real time or regularly, and when the battery is in poor condition, you can replace the battery with a new one to ensure economy and safety. For this reason, there are endless instruments and equipment on the market for battery testing and battery replenishment.

[0003] There are many simple and cheap battery testers, but they can usually only test the battery voltage and internal resistance, and cannot effectively detect the battery capacity. The internal resistance test is also inaccurate, making it difficult to diagnose the complete and true health status and performance status of the battery.

[0004] Although professional battery testing equipment is fully functional and can accurately measure and detect battery performance, it is expensive, has a complicated testing process, is bulky and cannot be carried around at all times, and is obviously not convenient for ordinary users to use in daily life.

[0005] In addition, in response to the problem of low battery in car batteries, there are many emergency starting power supplies for ignition on the market, but they can only be used in an emergency when an accident occurs. There is no way to detect battery performance in advance, and it is difficult to avoid accidents. There are popular mobile power supplies (also called outdoor mobile power supplies, outdoor power supplies, and mobile energy storage power supplies), which are becoming more and more popular among the general public. Among them, when it comes to battery-related functions, they can only supplement and charge the battery, but they do not have battery detection functions or are imperfect, and cannot prevent accidents. Summary of the invention

[0006] In order to solve the problems in the prior art, the present invention provides a mobile power supply with a battery detection function. The battery detection function is integrated into the mobile power supply, which can not only recharge the battery when it is out of power, but also measure the battery performance status in real time, so that the user can know the battery status in time, which is convenient and improves the reliability and safety of vehicle operation.

[0007] The mobile power supply with battery detection function of the present invention includes a main control module, a low-voltage power conversion module, a bidirectional DC-AC rectifier-inverter module, a bidirectional DC-DC isolation conversion module, a bidirectional DC-DC buck-boost conversion module, an AC power interface, a DC power interface, a battery detection control circuit, and a battery module. Among them,

[0008] One end of the bidirectional DC-AC rectifier-inverter module is connected to the AC power interface. The bidirectional DC-DC isolation conversion module is arranged between the other end of the bidirectional DC-AC rectifier-inverter module and the battery module. One end of the bidirectional DC-DC buck-boost conversion module is arranged between the bidirectional DC-AC rectifier-inverter module and the bidirectional DC-DC isolation conversion module, or is arranged between the bidirectional DC-DC isolation conversion module and the battery module. The other end of the bidirectional DC-DC buck-boost conversion module is connected to the DC power interface. The DC power interface is used to connect an external battery to realize the mobile power supply function of charging and discharging the external battery, or the battery detection function of charging and discharging the external battery.

[0009] The input end of the low-voltage power conversion module is connected between the bidirectional DC-DC isolation conversion module and the battery module, and is used to provide a working power supply for the main control module.

[0010] The main control module is respectively connected to the bidirectional DC-AC rectifier-inverter module, the bidirectional DC-DC isolation conversion module, the bidirectional DC-DC buck-boost conversion module, and the battery detection control circuit. The battery detection control circuit is connected to the DC power interface and is used to control the charging and discharging operations of the external battery. Through the charging and discharging operations, the dynamic internal resistance, voltage, and power of the battery can be tested.

[0011] Further, when the external battery is a high-voltage battery with a voltage exceeding the first set value, one end of the bidirectional DC-DC buck-boost conversion module is arranged between the bidirectional DC-AC rectifier-inverter module and the bidirectional DC-DC isolation conversion module. When the external battery is a low-voltage battery with a voltage lower than the first set value, one end of the bidirectional DC-DC buck-boost conversion module is arranged between the bidirectional DC-DC isolation conversion module and the battery module.

[0012] Further, a solar charging module is also provided in the mobile power supply. The input end of the solar charging module is connected to the first DC power interface. The output end of the solar charging module is connected to the battery module in the mobile power supply. The DC power interface includes a first DC power interface. The first DC power interface is a low-voltage interface with a voltage lower than the first set value. The battery to be tested and the solar panel can share the first DC power interface.

[0013] Further, a solar charging panel and a main control board are provided inside the mobile power supply. The solar charging module is arranged on the solar charging panel, and the battery detection and control circuit is arranged on the solar charging panel or the main control board.

[0014] Further, a storage battery detection board is provided inside the mobile power supply, and further includes a second bidirectional DC-DC buck-boost conversion module. The second bidirectional DC-DC buck-boost conversion module and the battery detection and control circuit are arranged on the storage battery detection board. The second bidirectional DC-DC buck-boost conversion module is connected to the high-voltage bus between the bidirectional DC-AC rectification and inversion module and the bidirectional DC-DC isolation conversion module through a power line. The DC power interface further includes a second DC power interface, and the second DC power interface is a high-voltage interface exceeding a first set value.

[0015] Further, a storage battery detection board is provided inside the mobile power supply. The bidirectional DC-DC buck-boost conversion module and the battery detection and control circuit are both arranged on the storage battery detection board. The bidirectional DC-DC buck-boost conversion module is connected to the high-voltage bus between the bidirectional DC-AC rectification and inversion module and the bidirectional DC-DC isolation conversion module through a power line. The DC power interface is a high-voltage interface exceeding a first set value.

[0016] The present invention also provides a battery detection method, which is realized by using the mobile power supply with a battery detection function. When there is no AC power input, energy exchange occurs between the battery module of the mobile power supply and the battery to be tested, so as to realize the charge and discharge operations of the battery to be tested.

[0017] When the mobile power supply is connected to an AC power supply through the AC power interface and the battery detection is started, energy exchange occurs between the input AC power and the battery to be tested, so as to realize the charge and discharge operations of the battery to be tested.

[0018] Before the charge and discharge, the static content of the battery to be tested is tested. During the charge and discharge process, the performance parameters of the battery to be tested are tested. The performance parameters include charge and discharge current, voltage, dynamic internal resistance, total battery capacity, and / or charge and discharge efficiency.

[0019] Further, when the mobile power supply is connected to an AC power supply through the AC power interface, it further includes a test step: performing multiple charge and discharge operations on the battery to be tested, and based on the obtained performance parameters, evaluating the energy feeding aging condition and service life of the battery to be tested in real time.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] Improve the existing mobile power bank and integrate the battery detection function into the mobile power bank, so that the mobile power bank is compatible with the battery test function, which is more convenient to use and more popular. The battery detection function is implemented at a low cost by integrating the existing circuit structure of the mobile power bank. For the mobile power bank, the cost increase is very small, and the appearance interface and other functions are not affected.

[0022] Mobile power supplies are usually equipped with larger batteries, which are equivalent to the capacity of the battery to be tested. The charge and discharge current provided during portable use is consistent with the actual use conditions of the battery pack to be tested. The test environment conditions are more realistic, and the relevant measurement data such as voltage and internal resistance are more accurate and practical.

[0023] The present invention can test the dynamic internal resistance during the charging and discharging process, and is not limited to the conventional static internal resistance test without charging and discharging. The dynamic internal resistance test is performed by setting a specific large current charging and discharging timing curve. Compared with the prior art that collects signals through a signal amplification circuit, the voltage signal of the present invention is stronger and easier to accurately detect.

[0024] According to the difference in the capacity of the batteries to be tested, a partial charge and discharge test method can be selected, and a complete charge and discharge cycle test is not required, thereby reducing the detection time. By statistically comparing the charge and discharge power, the charge and discharge efficiency can be calculated and measured, the battery performance health status can be obtained, and a quantitative evaluation index of "charging failure" can be obtained;

[0025] When the mobile power bank is not plugged in, the battery capacity of the mobile power bank is used for ordinary complete tests; when connected to an external power source, more professional tests with unlimited times and capacity can be performed, including energy-feedback aging tests on the battery under test. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the present invention or the solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the existing mobile power supply of the present invention;

[0028] Figure 2 This is a schematic diagram of the main structure of existing battery testing equipment;

[0029] Figure 3 This is a schematic diagram of the structure of an embodiment of the present invention;

[0030] Figure 4 It is a schematic structural diagram of another embodiment of the present invention. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as commonly understood by one of ordinary skill in the technical field to which the present invention pertains; the terms used in the description of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention; the terms "comprising" and "having" and any variations thereof in the description and claims of the present invention and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present invention or the above drawings are used to distinguish different objects and are not used to describe a specific order.

[0032] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an exclusive, independent, or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention can be combined with other embodiments.

[0033] In order to enable those skilled in the art of the present technology to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0034] At present when mobile power supplies are becoming popular, the battery detection solution proposed by the present invention makes battery detection applications such as storage batteries more convenient, practical, and economical. For example, when a vehicle owner uses a mobile power supply product of the present invention, not only can the embarrassment of being stranded due to storage battery power failure or damage be completely avoided; but also the storage battery can be tested irregularly during daily vehicle use. Through real charge and discharge tests, the capacity can be accurately detected, and the internal resistance under charge and discharge conditions can be detected, obtaining real and accurate battery performance indicators to determine the battery health status. Thus, the user can decide whether the battery needs to be replaced or updated by himself / herself, appropriately extend the replacement cycle of the storage battery, and reduce the vehicle use cost. In other scenarios where storage batteries are used, the same real-time battery detection can be achieved for other vehicles, electromechanical equipment, etc.

[0035] Such as Figure 1As shown in the figure, existing mobile power supplies generally include an MCU circuit on the main control board, a low-voltage power conversion module, a main bidirectional DC / AC rectifier-inverter module, a main bidirectional DC-DC isolation conversion module, a bidirectional DC-DC buck-boost conversion module, and a battery module. The external AC power supply is processed by the DC / AC rectifier-inverter module and the main bidirectional DC-DC isolation conversion module to charge the battery module. The battery module discharges through the bidirectional DC-DC buck-boost conversion module to charge the external battery, realizing the battery endurance function. Some mobile power supplies also have a solar conversion function, with a solar charging panel set inside the mobile power supply to charge the battery module.

[0036] As Figure 2 shown in the figure, in existing battery testing equipment, it mainly includes a bidirectional DC / AC rectifier-inverter module and a bidirectional DC-DC battery charge and discharge circuit. Through the bidirectional DC / AC rectifier-inverter module and the bidirectional DC-DC battery charge and discharge circuit, the charge and discharge function of the external battery is realized. In addition, a battery measurement control circuit and an MCU circuit are configured inside the equipment to realize the battery detection function.

[0037] As Figure 3 and Figure 4 shown in the figure, the present invention is based on the internal units of a mobile energy storage power supply as the basic carrier for integrated design, realizing power conversion, sharing of battery circuit devices, sharing of control chips, etc., and collaborative control. Through low-cost integrated design on the basis of the existing mobile power supply, the realization and innovation of the battery detection function are achieved, which is convenient to use and has a wider range of applications.

[0038] Specifically, a battery measurement control circuit and a bidirectional DC-DC buck-boost conversion module are added inside the mobile power supply of the present invention, and the existing battery detection algorithm is integrated in the main control module. One end of the bidirectional DC-AC rectifier-inverter module is connected to the AC power supply interface, and the bidirectional DC-DC isolation conversion module is arranged between the other end of the bidirectional DC-AC rectifier-inverter module and the battery module. One end of the bidirectional DC-DC buck-boost conversion module is arranged between the bidirectional DC-AC rectifier-inverter module and the bidirectional DC-DC isolation conversion module, or is arranged between the bidirectional DC-DC isolation conversion module and the battery module. The other end of the bidirectional DC-DC buck-boost conversion module is connected to the DC power supply interface, and the DC power supply interface is used to connect an external battery to realize the mobile power supply function of charging and discharging the external battery, or the battery detection function of charging and discharging the external battery.

[0039] The input end of the low-voltage power conversion module is connected between the bidirectional DC-DC isolation conversion module and the battery module, and is used to provide the working power supply for the main control module.

[0040] The main control module is respectively connected to the bidirectional DC-AC rectifier-inverter module, the bidirectional DC-DC isolation conversion module, the bidirectional DC-DC buck-boost conversion module, and the battery detection and control circuit. The battery detection and control circuit is connected to the DC power supply interface and is used to control the charging and discharging operations of the external battery. Through the charging and discharging operations, the dynamic internal resistance, voltage, and power of the battery can be tested.

[0041] In this example, the battery measurement algorithm and the battery detection and control circuit can both adopt the internal circuits of existing battery testing equipment. The bidirectional DC-AC rectifier-inverter module and the bidirectional DC-DC isolation conversion module are existing mobile power modules. The bidirectional DC-DC buck-boost conversion module only needs to achieve bidirectional buck-boost conversion. For example, a buck-boost chip, a boost buck-boost circuit, etc. can be used, which will not be elaborated here one by one.

[0042] The voltage of existing mobile power supplies is usually in the approximate range of 12V to 48V. The DC bus voltage of the main conversion circuit is usually in the approximate range of 350V to 450V. The solar panel is usually in the approximate range of 12V to 72V. For the battery under test, the voltage is usually 12V or 24V for automotive batteries, 48V for power tools, 110V for special locomotive and subway vehicle batteries, and the total voltage of electric vehicle power batteries is in a wide range of 300V to 800V. When the input is 220Vac alternating current, the rectified bus voltage range is... When the input is 110Vac alternating current, it usually takes a value of 200V to 300V, etc. According to the voltage range of the battery under test and the DC bus voltage value of the main conversion circuit, the present invention sets a set value and designs it according to two voltage levels of exceeding and lower than this set value, and adopts different implementation methods to achieve the best power conversion efficiency, the requirements of safety isolation, and the needs of cost control. The set value in this example is 200V. Of course, in this example, it can also take any value between 150V and 300V.

[0043] Preferably, in this example, a 200V boundary is set, and two connection composition schemes are formed for other parts of the battery detection function under different conditions.

[0044] As Figure 3 shown, as an embodiment of the present invention, when the voltage of the battery under test in this example is ≤200V, the design of the solar charging panel is adjusted. The unidirectional charging module on the solar charging panel is adjusted to a bidirectional DC-DC buck-boost conversion module, and the battery measurement control circuit is set on the original solar charging panel to form a "solar charging and battery detection charging and discharging board". Its internal connection method to the battery module remains unchanged, and the external connection design is a DC power supply interface compatible with the solar panel and the battery under test, still having a group of external interfaces with the same number of interfaces.

[0045] The solar charging and battery detection control board still has the core function of DCDC power conversion. However, compared with the original solar charging board, the "solar charging and battery detection charge and discharge board" has the following adjusted designs:

[0046] a. The external interface voltage changes. Combining the solar charging voltage required by the product and the voltage of the battery to be tested, the larger value is taken.

[0047] b. The power change of the power conversion is designed to be ≥ the original solar charging power to meet the need for large current during battery detection.

[0048] c. The DCDC power supply is designed to be bidirectionally controllable to enable charging and discharging of the battery to be tested.

[0049] d. Through the communication (such as RS485, CAN and other serial communications) between the main control board and the solar charging and battery detection charge and discharge board, in the battery detection mode, it receives the battery detection algorithm instructions from the main control board and executes the detection actions. The original MPPT control of solar charging is still implemented by this board.

[0050] e. A battery measurement control circuit (including precise detection of battery voltage and battery current, etc.) is added. Optionally, this control circuit can also be integrated into the main control board.

[0051] Of course, if the solar charging function is not set in this example, only a battery measurement control circuit needs to be added, and then the DCDC power supply for charging the battery is designed to be bidirectionally controllable to enable charging and discharging of the battery to be tested.

[0052] As Figure 4 shown, when the voltage of the battery to be tested > 200V, since the original low voltage cannot meet the charging and discharging requirements of the battery to be tested, this example is no longer integrated into the original low-voltage side solar panel. Instead, a battery detection charge and discharge board is separately set, and then a bidirectional DCDC battery charging and discharging module is set on the battery detection charge and discharge board, keeping the components of the original solar charging board completely unchanged. At this time, the internal main circuit will be connected to the high-voltage bus side to meet the needs of high-efficiency power conversion and safe operation. The solar charging board interface and the battery interface to be tested are set independently in two groups and are electrically isolated from each other. The battery detection control circuit is designed to be integrated into the new battery detection charge and discharge board and communicates with the main control board through a serial port. Optionally, it can also still be integrated into the main control board.

[0053] Of course, the energy storage power supply in this example can also be compatible with both schemes. Only need to design the two improved circuits into the energy storage power supply internally, and set two DC power interfaces on the energy storage power supply housing, namely a low-voltage interface for voltage detection below 200V and a high-voltage interface for voltage detection above 200V, which are respectively used to connect high-voltage batteries and low-voltage batteries to realize its detection function and charging and endurance function.

[0054] When battery detection is required, the control method of the present invention is as follows:

[0055] First, when there is no AC power input, energy exchange occurs between the battery module of the mobile power supply and the battery to be tested, enabling charge and discharge operations on the battery to be tested, and battery detection is performed during the operation.

[0056] When detecting a battery with a voltage below 200V, the battery detection control circuit is integrated with the original solar panel and directly connected to the battery module of the mobile power supply for operation. During the detection process, other components of the mobile power supply, such as the bidirectional DC-DC isolation conversion module and the bidirectional DC-AC rectification and inversion module, do not need to work.

[0057] When detecting a battery with a voltage above 200V, the battery detection control circuit is independently designed and connected to the 400V high-voltage bus of the mobile power supply. During the detection process, the bidirectional DC-DC isolation conversion module of the mobile power supply is started, and the original solar charging panel, bidirectional DC-AC rectification and inversion module, etc. do not need to work.

[0058] Second, when the mobile power supply is connected to AC and battery detection is started, energy exchange occurs between the input AC source and the battery to be tested, enabling charge and discharge operations on the battery to be tested. At this time:

[0059] When detecting a battery with a voltage below 200V, the battery detection control circuit is integrated with the original solar panel and directly connected to the battery module of the mobile power supply for operation. During the detection process, the bidirectional DC-AC rectification and inversion module and the DC-DC isolation conversion module of the mobile power supply are started to work, realizing charge and discharge of the battery connected to the DC power interface.

[0060] When detecting a battery with a voltage above 200V, the battery detection control circuit is connected to the 400V high-voltage positive and negative buses of the mobile power supply. During the detection process, in addition to the battery detection control circuit itself, the bidirectional DC-AC rectification and inversion module of the mobile power supply is started to work, while the DC-DC isolation conversion module does not need to work.

[0061] Since the battery detection circuit is provided with a power conversion circuit with a larger power, when performing battery detection, a charge and discharge with a larger current will be started. During this process, the main control module controls the battery detection control circuit to perform tests on dynamic internal resistance, voltage, and battery capacity. Specifically, the following control functions are included:

[0062] a: Mobile power supplies are usually equipped with larger battery capacity, which is equivalent to the capacity of the battery to be tested. The capacity of the battery to be tested is usually less than 5 times the capacity of the mobile power supply battery pack. In this way, when the battery detection function is started without AC input, the test charge and discharge current provided is basically consistent with the actual use scenario of the battery pack to be tested, the test environment conditions are more realistic, and the relevant measurement data such as voltage and internal resistance are more accurate and practical;

[0063] b: Dynamic internal resistance is tested during the charging and discharging process, rather than being limited to conventional static internal resistance testing without charging and discharging. In existing testing equipment, internal resistance measurement is completed by applying a small AC current signal and then collecting a weak voltage feedback signal through a precision amplifier circuit. The dynamic internal resistance test of the present invention is performed by setting a specific large current charging and discharging timing curve. Therefore, the current of the present invention is large and the feedback voltage signal is strong, making detection easier and the measurement result more accurate.

[0064] c: According to the difference in the capacity of the batteries to be tested, when the battery capacity is large, especially when it is larger than the battery capacity of the mobile power supply itself, or when fast measurement is required, a partial charge and discharge test method of non-full charge and discharge is implemented. At this time, according to the formula, total capacity = battery voltage range * local charge and discharge ampere-hour capacity change / local charge and discharge voltage change, the total battery capacity is estimated;

[0065] d: By comparing the charging and discharging power separately, the charging and discharging efficiency can be calculated and measured, and another key indicator of the battery performance health status can be obtained, that is, a quantitative evaluation indicator of the commonly said "charge failure" can be obtained, providing a scientific guide for users to replace batteries;

[0066] e: When the mobile power bank is not plugged in, the power of the mobile power bank's battery module can be used to perform a complete battery detection test; when connected to an external power source, more professional tests with unlimited times and capacity can be performed, including real-time energy feeding and aging life tests of the battery.

[0067] 3. When the battery test is not performed, the present invention can charge the external battery through the DC power interface. When there is no AC input, the power of the mobile power battery module is fully transferred to the external battery to meet the emergency power requirements. When the AC power is connected, the external battery can be fully charged through the AC power. Realize the battery life function of the external battery

[0068] 4. The DC power interface of the external battery in this example can also be used as a battery expansion to provide power to the mobile power supply and maintain a longer inverter output endurance.

[0069] In summary, the present invention has the following outstanding innovations:

[0070] 1. The single interface can achieve functions such as external battery charging, external battery charging of the internal battery module, and external battery testing. It has small hardware modifications, low implementation costs, is more convenient to use, and has a more widespread scenario.

[0071] 2. When used in a mobile and portable manner, the magnitude of the charging and discharging current provided is consistent with the actual usage conditions of the battery under test, the test environmental conditions are more realistic, and relevant measurement data such as voltage and internal resistance are more accurate and practical.

[0072] 3. The present invention can not only measure the static internal resistance but also test the dynamic internal resistance. In addition, through the settings and test methods of the present invention, the voltage signal is stronger and it is easier to accurately detect.

[0073] 4. According to the difference in the capacity of the battery under test, a partial charge-discharge test method can be selected, and a complete charge-discharge cycle test is not required, thereby reducing the detection time.

[0074] 5. When the mobile power supply is not connected to an external power supply, an ordinary complete test is carried out using the battery power capacity of the mobile power supply. When an external power supply is connected, more professional tests with unlimited numbers and capacities can be carried out, including the feed energy aging test of the battery under test, so that a complete battery test function that can only be achieved by professional test instruments can be realized at low cost.

[0075] The above-described specific implementation manners are the preferred implementation manners of the present invention, and do not limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation manner. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A mobile power source with a battery detection function, characterized in that: It includes a main control module, a low-voltage power conversion module, a bidirectional DC-AC rectifier inverter module, a bidirectional DC-DC isolation conversion module, a bidirectional DC-DC buck-boost conversion module, an AC power interface, a DC power interface, a battery detection control circuit and a battery module, among which: One end of the bidirectional DC-AC rectifier-inverter module is connected to the AC power interface, the bidirectional DC-DC isolation conversion module is arranged between the other end of the bidirectional DC-AC rectifier-inverter module and the battery module, one end of the bidirectional DC-DC buck-boost conversion module is arranged between the bidirectional DC-AC rectifier-inverter module and the bidirectional DC-DC isolation conversion module, or between the bidirectional DC-DC isolation conversion module and the battery module, the other end of the bidirectional DC-DC buck-boost conversion module is connected to the DC power interface, the DC power interface is used to connect an external battery to realize a mobile power function for charging and discharging an external battery, or a battery detection function for charging and discharging an external battery, The input terminal of the low-voltage power conversion module is connected between the bidirectional DC-DC isolation conversion module and the battery module, and is used to provide working power for the main control module. The main control module is respectively connected to the bidirectional DC-AC rectifier inverter module, the bidirectional DC-DC isolation conversion module, the bidirectional DC-DC buck-boost conversion module, and the battery detection control circuit. The battery detection control circuit is connected to the DC power supply interface and is used to control the charging and discharging operations of the external battery. Through the charging and discharging operations, the dynamic internal resistance, voltage, and power of the battery can be tested.

2. The mobile power source with battery detection function according to claim 1, characterized in that: When the voltage of the external battery is a high-voltage battery exceeding the first set value, one end of the bidirectional DC-DC buck-boost conversion module is arranged between the bidirectional DC-AC rectifier inverter module and the bidirectional DC-DC isolation conversion module; when the voltage of the external battery is a low-voltage battery lower than the first set value, one end of the bidirectional DC-DC buck-boost conversion module is arranged between the bidirectional DC-DC isolation conversion module and the battery module.

3. The mobile power source with battery detection function according to claim 2, characterized in that: The mobile power supply is also provided with a solar charging module, the input end of the solar charging module is connected to the first DC power interface, the output end of the solar charging module is connected to the battery module in the mobile power supply, the DC power interface includes a first DC power interface, the first DC power interface is a low-voltage interface with a voltage lower than a first set value, and the battery to be tested and the solar panel can share the first DC power interface.

4. The mobile power source with battery detection function according to claim 3, characterized in that: The mobile power supply is provided with a solar charging panel and a main control panel, the solar charging module is arranged on the solar charging panel, and the battery detection control circuit is arranged on the solar charging panel or the main control panel.

5. The mobile power source with battery detection function according to claim 3, characterized in that: The mobile power supply is provided with a battery detection board inside, and also includes a second bidirectional DC-DC buck-boost conversion module. The second bidirectional DC-DC buck-boost conversion module and the battery detection control circuit are arranged on the battery detection board. The second bidirectional DC-DC buck-boost conversion module is connected to the high-voltage bus between the bidirectional DC-AC rectifier inverter module and the bidirectional DC-DC isolation conversion module through a power line. The DC power supply interface also includes a second DC power supply interface, and the second DC power supply interface is a high-voltage interface that exceeds the first set value.

6. The mobile power source with battery detection function according to claim 2, characterized in that: A battery detection board is provided inside the mobile power supply, and the bidirectional DC-DC buck-boost conversion module and the battery detection control circuit are both arranged on the battery detection board. The bidirectional DC-DC buck-boost conversion module is connected to the high-voltage bus between the bidirectional DC-AC rectifier inverter module and the bidirectional DC-DC isolation conversion module through a power line, and the DC power supply interface is a high-voltage interface exceeding a first set value.

7. A battery detection method, implemented by using the mobile power supply with battery detection function according to any one of claims 1 to 6, characterized in that: When there is no AC power input, the battery module of the mobile power supply exchanges energy with the battery to be tested to realize the charging and discharging operation of the battery to be tested. When the mobile power supply is connected to the AC power supply through the AC power supply interface and the battery detection is started, energy is exchanged between the input AC power supply and the battery to be tested to realize the charging and discharging operation of the battery to be tested. Before charging and discharging, the static content of the battery to be tested is tested, and during the charging and discharging process, the performance parameters of the battery to be tested are tested, and the performance parameters include charging and discharging current, voltage, dynamic internal resistance, total battery capacity and / or charging and discharging efficiency.

8. The battery detection method according to claim 7, characterized in that: When the mobile power supply is connected to an AC power supply through the AC power interface, the test step also includes: charging and discharging the battery to be tested multiple times, and based on the obtained performance parameters, evaluating the energy aging and service life of the battery to be tested in real time.

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