Multi-battery charging management method and device

Abstract

The invention belongs to the field of battery management, and provides a multi-battery charging management method and a multi-battery charging management device, an intelligent channel mode and a forced channel mode are set, the SOC value of a battery in each channel can be monitored in the intelligent channel mode, and each battery pack is controlled to charge and discharge in line by comparing the SOC value with a preset threshold value, so that the charging efficiency is improved. The battery pack controlling the SOC value is charged and discharged preferentially, chaos is avoided, safety is ensured, in addition, the battery pack switching speed is high, and equipment power failure is avoided.

Description

Technical Field

[0001] The present application belongs to the field of battery management, and specifically, relates to a multi-battery charging management method and device thereof. Background Art

[0002] When used for power supply of bidirectional inverter, conventional scheme only connects one battery for charging and discharging. When used as backup power source, when bidirectional inverter is not connected to mains, it cannot continue to supply power after using up the power of one battery pack. If multiple battery packs are connected in parallel to increase capacity, the power of parallel battery packs will be inconsistent and they will charge and discharge each other. If the voltage difference of parallel battery packs is large, it will generate very large charge and discharge current, causing the battery, protection board and its circuit to bear huge current and generate huge heat, which may cause equipment failure, fire and other risks. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings in the prior art, the purpose of the present application is to provide a multi-battery charging management method and device thereof, which controls the charging and discharging queues of each battery pack by detecting the battery SOC value corresponding to each channel, and controls the battery pack with the highest SOC value to be charged and discharged first.

[0004] The technical means adopted by this application to solve the above technical problems are:

[0005] The present application provides a multi-battery charging management method, comprising:

[0006] Get the output mode, which includes intelligent channel mode and forced channel output mode;

[0007] In smart channel mode:

[0008] Get the battery status and SOC value in each channel. The battery status includes discharge status and non-discharge status.

[0009] Get the △SOC value. When the △SOC value is greater than the switching threshold, close the corresponding channel of the battery in the discharge state and open the corresponding channel of the battery with the maximum SOC value.

[0010] △SOC = maximum SOC value - SOC value of the battery in the discharge state;

[0011] In forced channel output mode:

[0012] Get the battery status of the forced output channel, which includes the discharge state and the non-discharge state;

[0013] If the battery status of the forced output channel is in the discharge state, the forced output channel is closed;

[0014] If the battery status of the forced output channel is non-discharging status, the forced output channel is turned on.

[0015] Preferably, the method further includes obtaining MOS switch information, and if the MOS switch is not opened or closed as specified, a fault is displayed or an alarm is issued.

[0016] Preferably, obtaining the battery state and SOC value in each channel also includes:

[0017] Get the power of each channel. If the channel is in a non-discharging state and its power is not greater than the locking threshold, proceed to the next step.

[0018] Preferably, obtaining a ΔSOC value, and when the ΔSOC value is greater than a switching threshold, closing a corresponding channel of a battery in a discharge state, and opening a corresponding channel of a battery with a maximum SOC value, further comprises:

[0019] Get the switching lock time. If the switching time is within the switching lock time, stop switching and maintain the original channel output. If the switching time is not within the switching lock time, continue switching and reset the switching lock time.

[0020] Preferably, the method further includes acquiring battery information in each channel and transmitting the information to a display.

[0021] Preferably, the method further includes monitoring whether a battery is inserted into each channel and transmitting the information to a display.

[0022] The present application also provides a multi-battery charging management device, comprising:

[0023] Controller;

[0024] A plurality of MOS switches, wherein the MOS switches are connected to the controller;

[0025] A plurality of hot-swap circuits, wherein the hot-swap circuits are connected to the MOS switches in a one-to-one correspondence;

[0026] A plurality of channels, wherein the channels are connected to the controller and the channels are connected to the hot-swap circuits in a one-to-one correspondence;

[0027] A current detection module, wherein the current detection modules are respectively connected to the MOS switches, and the current detection modules are connected to the controller;

[0028] A display interaction screen is connected to the controller.

[0029] Compared with the prior art, the multi-battery charging management method and management device of the present application sets an intelligent channel mode and a forced channel mode. In the intelligent channel mode, the battery SOC value in each channel can be monitored, and the △SOC value can be compared with a preset threshold value to control the charging and discharging queue of each battery pack. The battery pack with the controlled SOC value is charged and discharged first to avoid confusion and ensure safety. In addition, the battery pack switching speed is fast to avoid power failure of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a flow chart of the multi-battery charging management method of the present application.

[0032] Figure 2 This is a wiring diagram of the multi-battery charging management device of this application. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0034] It should be noted that: unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] like Figure 1 As shown, this embodiment provides a multi-battery charging management method, including:

[0036] Get the output mode, which includes intelligent channel mode and forced channel output mode;

[0037] In smart channel mode:

[0038] Get the battery status and SOC value in each channel. The battery status includes discharge status and non-discharge status.

[0039] Get the △SOC value. When the △SOC value is greater than the switching threshold, close the corresponding channel of the battery in the discharge state and open the corresponding channel of the battery with the maximum SOC value.

[0040] △SOC = maximum SOC value - SOC value of the battery in the discharge state;

[0041] In forced channel output mode:

[0042] Get the battery status of the forced output channel, which includes the discharge state and the non-discharge state;

[0043] If the battery status of the forced output channel is in the discharge state, the forced output channel is closed;

[0044] If the battery status of the forced output channel is non-discharging status, the forced output channel is turned on.

[0045] In some preferred embodiments of the present invention, the MOS switch information is obtained, and if the MOS switch is not opened or closed as specified, a fault is displayed or an alarm is issued. In this way, monitoring the MOS switch can ensure that the operating status of the system is monitored and the fault is handled in time.

[0046] In some preferred embodiments of the present invention, obtaining the battery state and SOC value in each channel further includes:

[0047] Get the power of each channel. If the channel is in a non-discharging state and its power is not greater than the lock threshold, go to the next step. In this way, the power of each channel can be monitored, and the high-power output locks the battery pack to prevent the battery pack from switching power under high-power load.

[0048] In some preferred embodiments of the present invention, the ΔSOC value is obtained, and when the ΔSOC value is greater than the switching threshold, the corresponding channel of the battery in the discharge state is closed, and the corresponding channel of the battery with the maximum SOC value is opened, further comprising:

[0049] Get the switching lock time. If the switching time is within the switching lock time, stop switching and maintain the original channel output. If the switching time is not within the switching lock time, continue switching and reset the switching lock time. In this way, you can set the battery pack charge and discharge switching SOC threshold or the lock time after switching to avoid frequent switching of battery packs with similar SOC values.

[0050] In some preferred embodiments of the present invention, the method further includes obtaining battery information in each channel and transmitting the information to a display, so that the battery information in the channel can be monitored in real time through the display.

[0051] In some preferred embodiments of the present invention, the method further comprises monitoring whether a battery is inserted into each channel and transmitting the information to a display.

[0052] like Figure 2 As shown, the present application also provides a multi-battery charging management device, including a controller, multiple MOS switches, multiple hot-swap circuits, multiple channels, a current detection module and a display interactive screen; the MOS switch is connected to the controller; the hot-swap circuit is connected to the MOS switch in a one-to-one correspondence; the channel is connected to the controller, and the channel is connected to the hot-swap circuit in a one-to-one correspondence; the current detection modules are respectively connected to the MOS switches, and the current detection modules are connected to the controller; the display interactive screen is connected to the controller.

[0053] Compared with the prior art, the multi-battery charging management method and management device of the present application sets an intelligent channel mode and a forced channel mode. In the intelligent channel mode, the battery SOC value in each channel can be monitored, and the △SOC value can be compared with a preset threshold value to control the charging and discharging queue of each battery pack. The battery pack with the controlled SOC value is charged and discharged first to avoid confusion and ensure safety. In addition, the battery pack switching speed is fast to avoid power failure of the equipment.

[0054] The above description is only a specific implementation mode of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should also be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A multi-battery charging management method, characterized in that: include: Get the output mode, which includes intelligent channel mode and forced channel output mode; In smart channel mode: Get the battery status and SOC value in each channel. The battery status includes discharge status and non-discharge status. Get the △SOC value. When the △SOC value is greater than the switching threshold, close the corresponding channel of the battery in the discharge state and open the corresponding channel of the battery with the maximum SOC value. △SOC = maximum SOC value - SOC value of the battery in the discharge state; In forced channel output mode: Get the battery status of the forced output channel, which includes the discharge state and the non-discharge state; If the battery status of the forced output channel is in the discharge state, the forced output channel is closed; If the battery status of the forced output channel is non-discharging status, the forced output channel is turned on.

2. The multi-battery charging management method according to claim 1, characterized in that: It also includes obtaining MOS switch information. If the MOS switch is not opened or closed as specified, a fault is displayed or an alarm is issued.

3. The multi-battery charging management method according to claim 1, characterized in that: Get the battery status and SOC value in each channel, including: Get the power of each channel. If the channel is in a non-discharging state and its power is not greater than the locking threshold, proceed to the next step.

4. The multi-battery charging management method according to claim 1, characterized in that: Obtain the △SOC value. When the △SOC value is greater than the switching threshold, close the corresponding channel of the battery in the discharge state and open the corresponding channel of the battery with the maximum SOC value. Also included: Get the switching lock time. If the switching time is within the switching lock time, stop switching and maintain the original channel output. If the switching time is not within the switching lock time, continue switching and reset the switching lock time.

5. The multi-battery charging management method according to claim 1, characterized in that: It also includes obtaining battery information within each channel and transmitting the information to the display.

6. The multi-battery charging management method according to claim 1, characterized in that: It also monitors whether a battery is inserted in each channel and transmits this information to the display.

7. A multi-battery charging management device, characterized in that: include: Controller; A plurality of MOS switches, wherein the MOS switches are connected to the controller; A plurality of hot-swap circuits, wherein the hot-swap circuits are connected to the MOS switches in a one-to-one correspondence; A plurality of channels, wherein the channels are connected to the controller and the channels are connected to the hot-swap circuits in a one-to-one correspondence; A current detection module, wherein the current detection modules are respectively connected to the MOS switches, and the current detection modules are connected to the controller; A display interaction screen is connected to the controller.

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