WO2023045332A1

WO2023045332A1 - Battery management system

Info

Publication number: WO2023045332A1
Application number: PCT/CN2022/090066
Authority: WO
Inventors: 余海军; 李爱霞; 谢英豪; 张学梅; 陈康
Original assignee: 广东邦普循环科技有限公司; 湖南邦普循环科技有限公司; 湖南邦普汽车循环有限公司
Priority date: 2021-09-24
Filing date: 2022-04-28
Publication date: 2023-03-30
Also published as: ES2971552A2; GB202318224D0; CN113872281A; DE112022002199T5; GB2622325A

Abstract

A battery management system, comprising: a plurality of battery connection modules, wherein each battery connection module has a positive input end and a negative input end; two adjacent battery connection modules are connected by means of positive input ends and negative input ends, such that the plurality of battery connection modules are connected to form at least part of a charging/discharging series circuit; and each battery connection module comprises a short-circuit unit, a battery connection unit for connecting batteries, and a connection/disconnection switching unit, the short-circuit unit being connected to the battery connection unit in parallel, and both the short-circuit unit and the battery connection unit being electrically connected to the positive input end and the negative input end by means of the connection/disconnection switching unit. A charging/discharging module is electrically connected to the charging/discharging series circuit, a battery monitoring module is connected to the battery connection unit, and a main control module is respectively connected to the battery monitoring module and the connection/disconnection switching unit to control the operation of the connection/disconnection switching unit according to a battery monitoring situation, such that the input and output of a battery are separately controlled, thereby ensuring a sufficient surplus of the capacity of the battery, and improving the power supply stability of the battery during cascade utilization.

Description

A battery management system

technical field

The present application relates to the technical field of battery management, in particular to a battery management system.

Background technique

In order to prolong the life cycle of the battery, the domestically recycled lithium battery can still be used as a reserve battery for off-peak energy storage after cascade utilization, for example, it is suitable for various mobile signal base stations. When recycling batteries are used in cascades, multiple batteries are usually formed into a battery pack, and then multiple battery packs are connected in parallel according to capacity requirements to obtain an energy storage power supply. However, in actual use, if the state of charge of individual batteries in the battery pack drops sharply, causing the voltage of the entire battery pack to drop, the existing battery management system will isolate the battery pack with a lower voltage. In this way, before the maintenance of the battery pack is completed, the reserve power of the energy storage power supply is still lower than the normal design power, thus affecting the normal power consumption.

Contents of the invention

This application aims to solve at least one of the technical problems existing in the prior art. For this reason, the present application proposes a battery management system, which can improve the power supply stability of battery cascade utilization.

A battery management system according to an embodiment of the first aspect of the present application, comprising: a plurality of battery connection modules, each of which has a positive input terminal and a negative input terminal, and between two adjacent battery connection modules The connection between the positive input terminal and the negative input terminal is used to realize the connection of a plurality of the battery connection modules to form at least a part of the charging and discharging series. The battery connection module includes a short-circuit unit, a battery connection for connecting unit and an on-off switching unit, the short-circuit unit is connected in parallel with the battery connection unit, and both the short-circuit unit and the battery connection unit are connected to the positive input terminal and the negative input terminal through the on-off switching unit electrical connection; charge and discharge module, electrically connected with the charge and discharge series circuit; battery monitoring module, connected with the battery connection unit to monitor battery condition; main control module, respectively connected with the battery monitoring module and the on-off switch The unit is connected to control the operation of the on-off switching unit according to the condition of the battery.

A battery management system according to an embodiment of the present application has at least the following beneficial effects:

The battery management system disclosed in the embodiments of the present application includes a plurality of battery connection modules, a charging and discharging module, a battery monitoring module, and a main control module. Wherein, each battery connection module has a positive input terminal and a negative input terminal, and two adjacent battery connection modules are connected through the positive input terminal and the negative input terminal to realize the connection of multiple battery connection modules to form at least part of the charging and discharging series circuit , and the battery connection module includes a short-circuit unit, a battery connection unit for connecting with the battery, and an on-off switching unit. If the negative input terminal is electrically connected, the main control module can control each battery connection unit or short-circuit unit to connect to the charging and discharging series circuit through the on-off switching unit, so that the batteries connected to the charging and discharging series circuit are connected in series with each other and connected to the charging and discharging module for charging and discharging. Normal charge and discharge. Based on this, the main control module monitors the battery condition of the battery connection unit through the battery monitoring module, so as to isolate the battery with abnormal battery condition from the charging and discharging series circuit, and then connect the normal and idle battery to the charging and discharging series circuit. Therefore, Compared with directly isolating the entire charge-discharge series circuit and waiting for maintenance or replacement of faulty batteries in the charge-discharge series circuit, this application can independently realize flexible control of the battery connection and connection in units of battery connection units to maintain the charge-discharge series circuit. The road is in a normal charging and discharging state, which further ensures sufficient battery capacity surplus, which is conducive to improving the power supply stability and reliability of battery cascade utilization, and can also reduce the frequency of battery maintenance and save maintenance costs.

According to some embodiments of the present application, the battery monitoring module includes a power monitoring unit and a charge-discharge test unit, the power monitor unit is connected to the battery connection unit to monitor the power condition of the battery, and the charge-discharge test unit is connected to the battery The battery connection unit is connected to perform charge and discharge tests on the battery connection unit, and the main control module is connected to the power monitoring unit and the charge and discharge test unit respectively.

According to some embodiments of the present application, it further includes a first on-off control module and a second on-off control module, the battery connection unit includes a first positive terminal and a first negative terminal, and the charge and discharge test unit includes a first input terminal and a second input terminal, the main control module is respectively connected with the first on-off control module and the second on-off control module to control the first on-off control module and the second on-off control module Module on-off, the first input terminal is connected to the first positive terminal through the first on-off control module, the second input terminal is connected to the first negative terminal through the second on-off control module Extreme connection.

According to some embodiments of the present application, the battery connection unit includes a first positive terminal and a first negative terminal, the on-off switching unit includes a first switch unit and a second switch unit, and the short-circuit unit includes a third input terminal and a fourth input terminal, the first switch unit includes a first connection terminal and a second connection terminal, the first connection terminal is connected to the positive input terminal, and the main control module is connected to the first switch unit To control the second connection terminal to be switched and connected to the first positive terminal and the third input terminal respectively, the second switch unit includes a third connection terminal and a fourth connection terminal, and the third connection terminal is connected to the third input terminal. The negative input terminal is connected, and the main control module is connected to the second switch unit to control the fourth connection terminal to be switched and connected to the first negative terminal and the fourth input terminal respectively.

According to some embodiments of the present application, a communication module is further included, and the main control module is connected with the communication module to send the battery condition to an external management platform.

According to some embodiments of the present application, it also includes a battery box, the battery box is provided with a plurality of battery stations for placing batteries, the battery connection unit corresponds to the battery stations one by one, and the battery station A displacement drive mechanism is provided on the position, and the displacement drive mechanism can drive the battery close to the battery connection unit for engagement, or drive the battery away from the battery connection unit for separation.

According to some embodiments of the present application, the displacement drive mechanism includes a sliding frame and a battery placement module for placing batteries, the sliding frame is installed on the battery station, and the battery placement module is slidably connected to the sliding frame .

According to some embodiments of the present application, the sliding frame is provided with a first driving module and a gear, the first driving module is connected with the gear transmission, the battery placement module is provided with a rack, and the gear is used for In order to mesh with the rack, the main control module is connected with the first driving module to control the operation of the first driving module, and the first driving module can drive the gear to rotate so that the gear passes through The rack drives the battery placement module to slide along the carriage.

According to some embodiments of the present application, the battery station is provided with a connecting base, the battery connecting unit includes a first connecting post and a second connecting post, and the first connecting post and the second connecting post pass through The on-off switching unit is respectively connected to the positive input terminal and the negative input terminal, the first connecting column and the second connecting column are arranged on the connecting seat, and the battery placement module is provided with A positive connection unit and a negative connection unit, the positive connection unit is used to connect the positive pole of the battery, the negative connection unit is used to connect the negative pole of the battery, the positive connection unit is provided with a first slot, the The negative connecting unit is provided with a second slot, the first slot is used for connecting the first connecting column, and the second slot is used for connecting the second connecting column.

According to some embodiments of the present application, both the first connecting column and the second connecting column are studs, the first slot and the second slot are threaded slots, and the connecting seat A second drive module is also provided, the second drive module is connected to the first connecting column and the second connecting column respectively, and the main control module is connected to the second driving module to control the first connecting column. Two driving modules work, the second driving module can drive the first connecting column to rotate so that the first connecting column is screwed to or separated from the first slot hole, and drive the second connecting column to rotate to The second connecting column is threadedly connected to or separated from the second slot hole.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

FIG. 1 is a schematic structural block diagram of a battery management system in an embodiment of the present application;

Fig. 2 is a schematic diagram of some circuit principles of the battery connection module, the first on-off control module and the second on-off control module in the embodiment of the present application;

Fig. 3 is a schematic diagram of the circuit connection of the charging and discharging series circuit, the main control module and the charging and discharging module in the embodiment of the present application;

Fig. 4 is a schematic structural diagram of a battery box in an embodiment of the present application;

Fig. 5 is a partial enlarged view of place a in Fig. 4;

Fig. 6 is a schematic structural diagram of a connection seat in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a battery placement module in an embodiment of the present application;

Fig. 8 is a schematic structural diagram of another connecting seat in the embodiment of the present application;

FIG. 9 is a schematic structural diagram of another battery placement module in the embodiment of the present application;

Fig. 10 is a bottom view of the connecting seat shown in Fig. 8 .

Reference signs:

Battery box 100, sliding frame 110, first drive module 111, gear 112, battery placement module 120, positive connection unit 121, negative connection unit 122, first slot 123, second slot 124, electrode elastic pressing piece 125, pressing Sheet 126, front baffle 127, rear baffle 128, side baffle 129, connection seat 130, second drive module 131, connection wire 132, second motor 133, worm gear box 134, insulating sheet 135, electrical connection terminal sheet 136 , battery connection unit 210, first connection column 211, second connection column 212, on-off switch unit 220, first switch unit 221, second switch unit 222, short circuit unit 230, charge and discharge module 300, power supply unit 310, load Unit 320, battery monitoring module 400, power monitoring unit 410, charge and discharge test unit 420, main control module 500, first on-off control module 610, second on-off control module 620, communication module 700, battery 800, battery positive pole 810 and the negative electrode 820 of the battery.

Detailed ways

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are only for explaining the present application, and should not be construed as limiting the present application.

In the description of the present application, it should be understood that when referring to orientation descriptions, such as terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" ", "Top", "Bottom", "Inner", "Outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the application.

In the description of the present application, several means one or more, and multiple means two or more. Greater than, less than, exceeding, etc. are understood as not including the original number, and above, below, within, etc. are understood as including the original number. If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features relation.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

As shown in FIGS. 1 to 10 , the battery management system according to the embodiment of the present application includes a plurality of battery connection modules, a charging and discharging module 300 , a battery monitoring module 400 and a main control module 500 . Wherein, each battery connection module has a positive input terminal and a negative input terminal, and two adjacent battery connection modules are connected through the positive input terminal and the negative input terminal to realize the connection of multiple battery connection modules to form at least part of the charging and discharging series circuit , and the charging and discharging series is connected to the charging and discharging module 300 . The battery connection module includes a short-circuit unit 230, a battery connection unit 210 for connecting to the battery 800, and an on-off switching unit 220. The short-circuit unit 230 is connected in parallel with the battery connection unit 210, and both the short-circuit unit 230 and the battery connection unit 210 are switched on and off. Cell 220 is electrically connected to the positive input and the negative input. The battery monitoring module 400 is connected to the battery connection unit 210 to monitor the battery condition, and the main control module 500 is respectively connected to the battery monitoring module 400 and the on-off switching unit 220 to control the on-off switching unit 220 to work according to the battery condition.

Wherein, the main control module 500 can be composed of a micro controller unit (micro controller unit, MCU) or a central processing unit (central processing unit, CPU) and its peripheral circuits, or an existing battery management system (battery management system, BMS). ) chip, the main control module 500 is not specifically limited.

That is to say, for each battery connection module, the main control module 500 separately controls the battery connection unit 210 or the short circuit unit 230 to connect to the charging and discharging series through the on-off switching unit 220, so that the batteries 800 connected to the charging and discharging series are connected in series. And communicate with the charging and discharging module 300 for normal charging and discharging. As shown in FIG. 3 , for example, a plurality of batteries 800 connected in series through the battery connection module form a charge-discharge series circuit, and the positive input terminal IN1 of the charge-discharge series circuit is connected to one end of the charge-discharge module 300 for charging and discharging. Both the negative input terminal IN2 of the series circuit and the other terminal of the charging and discharging module 300 are connected to the main control module 500 . Specifically, the charging and discharging module 300 may include a power supply unit 310 and a load unit 320 connected in parallel. The power supply unit 310 is used to charge the charging and discharging series circuit, and the load unit 320 is used to discharge the charging and discharging series circuit. Including but not limited to resistors and electrical equipment, etc., the main control module 500 can control the charging and discharging series to communicate with the power supply unit 310 and the load unit 320 in sequence to complete a charging and discharging process.

It can be seen that the main control module 500 monitors the battery condition of the battery connection unit 210 through the battery monitoring module 400, thereby isolating the battery 800 with an abnormal battery condition from the charging and discharging string, and then connecting the battery 800 with a normal battery condition and being idle to the charging and discharging string. Therefore, compared to directly isolating the entire charge-discharge series circuit and waiting for maintenance or replacement of faulty batteries in the charge-discharge series circuit, this application can independently realize flexible control of the battery connection and connection with the battery connection unit 210. In order to maintain the charging and discharging series in a normal charging and discharging state, it can effectively deal with the situation that the maintenance personnel cannot replace the battery in time, which is conducive to improving the stability and reliability of the power supply of the battery cascade utilization, and can also adopt a reliable and economical physical structure to ensure the surplus of battery capacity Sufficient, reducing the frequency of battery maintenance, saving maintenance costs.

It can be understood that the number of battery connection modules can be adjusted according to demand, so that the number of battery connection modules is greater than the number of batteries required by the predetermined voltage, so as to ensure that there is still a backup battery in the case of a certain number of batteries failing to maintain the charging and discharging series circuit normal use.

In the embodiment of the present application, the battery monitoring module 400 may use the power monitoring unit 410 and the charging and discharging testing unit 420, etc., and there is no specific limitation thereto. Specifically, both the power monitoring unit 410 and the charging and discharging testing unit 420 are connected to the battery connection unit 210 . The power monitoring unit 410 may include, but not limited to, a state of charge (state of charge, SOC) monitoring unit and a battery health degree (state of health, SOH) monitoring unit, which are respectively used to monitor the charging capacity and the charging capacity of the battery connected to the battery connection unit 210. Performance status and other power conditions are monitored. The charge and discharge test unit 420 is used to perform a separate charge and discharge test on the battery connected to the battery connection unit 210. Optionally, the charge and discharge test unit 420 includes a charging branch, a discharging branch and a switching unit connected in parallel. The charging branch includes The power supply and the discharge branch include loads (such as resistors and electrical equipment, etc.), and the switching unit can be a transfer switch or a relay. The main control module 500 is connected to the switching unit to control the operation of the switching unit. The switching unit is used to connect the battery connection unit 210 with the charging branch to charge the battery connected to the battery connection unit 210, or connect the battery connection unit 210 to the discharge branch. The circuit is turned on to discharge the battery connected to the battery connection unit 210 .

Based on this, the main control module 500 is connected to the power monitoring unit 410 and the charging and discharging testing unit 420 respectively. The control module 500 can perform a charge and discharge test on the abnormal battery through the charge and discharge test unit 420, so as to identify whether the battery connected to the battery connection unit 210 has a single sporadic failure according to the monitoring results of the power monitoring unit 410 during the charge and discharge test. The battery that returns to normal after a single accidental failure can be reconnected to the charging and discharging series, or the damaged battery can be recorded for subsequent maintenance. Therefore, by identifying a single occasional fault battery and reusing it, avoiding the waste of resources caused by direct shelving or replacing the battery, further prolonging the service life of the battery, and expanding the application range of battery cascade utilization.

In the embodiment of the present application, the battery connection unit 210 includes a first positive terminal and a first negative terminal. Further, optionally, as shown in FIG. 2 , the battery management system further includes a first on-off control module 610 and a second The on-off control module 620, the first on-off control module 610 and the second on-off control module 620 can all use relays or switch components (such as single-pole switches or toggle switches, etc.), which are not limited. The charging and discharging test unit 420 includes a first input terminal and a second input terminal, such as the input terminals IN3 and IN4 shown in FIG. input connection. The main control module 500 is respectively connected with the first on-off control module 610 and the second on-off control module 620 to control the on-off of the first on-off control module 610 and the second on-off control module 620, for example, to control the on-off of the first on-off control module 610 and the second on-off control module 620 in FIG. The connecting end of an on-off control module 610 is connected to the upper contact, then the first on-off control module 610 is disconnected, if the connecting end of the first on-off control module 610 is controlled to be connected to the lower contact, the first on-off control The channel of the module 610 is similarly applicable to the second on-off control module 620 . Based on this, the first input terminal is connected to the first positive terminal through the first on-off control module 610, and the second input terminal is connected to the first negative terminal through the second on-off control module 620. When the first on-off control module 610 and When the second on-off control unit is connected, the charge and discharge test unit 420 is connected to the battery connection unit 210, which facilitates the separate charge and discharge test of the battery connection unit 210 under the condition that the battery connection unit 210 is isolated from the charge and discharge series. Controllability.

In some optional implementation manners, as shown in FIG. 2, the on-off switching unit 220 includes a first switch unit 221 and a second switch unit 222, the short-circuit unit 230 includes a third input terminal and a fourth input terminal, and the first switch The unit 221 includes a first connection end and a second connection end, and the first connection end is connected to the positive input end. The main control module 500 is connected to the first switch unit 221 , so as to control the switching connection between the second connection terminal and the first positive terminal and the third input terminal respectively. The second switch unit 222 includes a third connection terminal and a fourth connection terminal, the third connection terminal is connected to the negative input terminal, and the main control module 500 is connected to the second switch unit 222, so as to control the connection between the fourth connection terminal and the first negative terminal Switch connection with the fourth input terminal. Based on this, when the second connection terminal is connected to the first positive terminal, and the fourth connection terminal is connected to the first negative terminal, the battery connection unit 210 is connected to the charging and discharging series circuit. And when the second connection end is connected to the third input end, and the fourth connection end is connected to the fourth input end, the short circuit unit 230 is connected to the charging and discharging series circuit.

In some optional implementation manners, the battery management system further includes a communication module 700, and the main control module 500 is connected to the communication module 700, so as to send the battery condition to an external management platform through the communication module 700. The communication module 700 may include but not limited to a Bluetooth communication module 700, a WiFi communication module 700 or a 2.4GHz wireless communication module 700, etc. The external management platform may be a cloud service platform, or a server, a mobile terminal (such as a mobile phone), a wearable device , tablet, laptop or desktop computer and other terminal management platforms. Specifically, the main control module 500 can generate a fault code according to the monitoring data of the battery monitoring module 400, combined with battery information such as the serial number and signal of the faulty battery, and then send the fault code to the external management platform through the communication module 700, so that the external management The platform provides fault prompts and analysis based on fault codes, so that relevant personnel can quickly learn about fault conditions and arrange fault handling.

In some optional implementation manners, the battery management system further includes a battery box 100, and the battery box 100 is provided with a plurality of battery stations for placing the battery 800, and the battery connection unit 210 is in one-to-one correspondence with the battery stations, so that A safer battery environment is provided to protect the battery 800 . The battery station is provided with a displacement driving mechanism, which can drive the battery 800 close to the battery connection unit 210 to join, or drive the battery 800 away from the battery connection unit 210 to separate, so it is more convenient to place and take the battery 800, and the operation is flexible .

For example, as shown in FIG. 4 , 16 battery stations are provided on the battery box 100 for placing 16 batteries. This is only an example, and the number of battery stations is not limited. In practical applications, the battery management system may include one or more battery boxes 100, the batteries placed in each battery box 100 belong to a battery pack, each battery pack is used to connect to the same charging and discharging series circuit, and the main control module The 500 can sequentially control the connection of different charge and discharge series circuits with the charge and discharge module 300 to complete the charge and discharge processes of different battery packs and realize the switching and use of different battery packs.

In one implementation, the displacement drive mechanism may include a conveyor belt, a drive motor, and at least two conveyor rollers, one of which may be coaxially connected to the drive motor, and this conveyor roller is connected to the other conveyor rollers through a conveyor belt. When the battery 800 is placed on the conveyor belt, the main control module 500 is connected to the drive motor to control the operation of the drive motor. The drive motor can drive the conveyor belt to drive the battery 800 to move from the end of the conveyor belt away from the battery connection unit 210 to the end close to the battery connection unit 210. Until the battery 800 is engaged with the battery connection unit 210 , similarly, the driving motor can also drive the conveyor belt to drive the battery 800 to move to an end far away from the battery connection unit 210 to realize the transmission of the battery 800 . Optionally, a limiting portion may also be provided on the conveyor belt for fixing the battery 800 placed on the conveyor belt to prevent the battery 800 from sliding.

In another implementation, as shown in Figure 4, the displacement driving mechanism may include a sliding frame 110 and a battery placement module 120 for placing the battery 800, the sliding frame 110 is arranged on the battery station, and the battery placement module 120 and the sliding frame 110 sliding connections. Optionally, the sliding frame 110 is a guide rail, and the battery placement module 120 is provided with a sliding block. The middle part of the sliding block is provided with a sliding groove, and the guide rail runs through the sliding groove. slide.

Optionally, as shown in Figure 4 and Figure 5, the carriage 110 is provided with a first drive module 111 and a gear 112, the first drive module 111 can be a drive motor or a reducer (such as a gear 112 reducer and a worm reducer device), etc., the first driving module 111 is connected to the gear 112, the battery placement module 120 is provided with a rack, the gear 112 is used to mesh with the rack, and the main control module 500 is connected to the first driving module 111 to control the first The driving module 111 works, and the first driving module 111 can drive the gear 112 to rotate so that the gear 112 drives the battery placement module 120 to slide along the sliding frame 110 through the rack. Specifically, the first drive module 111 adopts a worm gear reducer, and the first drive module 111 includes a first motor, a first worm wheel and a first worm, and the first worm wheel and the first worm adopt a self-locking structure. The first motor is connected in rotation with the first worm wheel, the first worm wheel meshes with the first worm, and the two ends of the first worm can be respectively fixedly connected with a gear 112, so the first motor drives the first worm wheel to rotate and can drive the first worm Rotate, and then drive the gears 112 at both ends of the first worm to rotate through the first worm.

Further, in some optional embodiments, a connection seat 130 is provided on the battery station, and the connection seat 130 may be made of insulating material. The battery connecting unit 210 includes a first connecting post 211 and a second connecting post 212 , and the first connecting post 211 and the second connecting post 212 are made of mutually insulated conductive materials. Both the first connecting column 211 and the second connecting column 212 are respectively connected to the positive input terminal and the negative input terminal through the on-off switching unit 220 , and the first connecting column 211 and the second connecting column 212 are disposed on the connecting seat 130 . The battery placement module 120 is provided with a positive connection unit 121 and a negative connection unit 122, the positive connection unit 121 is used to connect the battery positive 810, the negative connection unit 122 is used to connect the battery negative 820, and the positive connection unit 121 is provided with a first slot hole 123, the negative connection unit is provided with a second slot 124, the first slot 123 is used to connect the first connecting column 211, and the second slot 124 is used to connect the second connecting column 212, so that through the connecting column and the slot The engagement of the battery connection unit 210 with the battery 800 is achieved by cooperation.

Wherein, both the positive connection unit 121 and the negative connection unit 122 can include an electrode block (such as a copper column) and an electrode spring 125, and the electrode spring 125 is made of a conductive material, and the positive electrode 810 of the battery is connected to the positive connection unit by squeezing the electrode spring 125. 121 is connected to the electrode block, and the negative electrode 820 of the battery is connected to the electrode block of the negative connection unit by pressing the electrode pressing piece 125 . Optionally, the battery placement module 120 also includes a housing and a rear baffle 128, an accommodating cavity and an opening are formed in the housing, and the rear baffle 128 is detachably connected to the housing to close the opening of the housing, so the The battery 800 is put into the accommodating cavity through the opening. Optionally, as shown in Fig. 7 and Fig. 9, the battery placement module 120 may include a front baffle 127, a rear baffle 128 and two side baffles 129, and the front baffle 127, the rear baffle 128 and two An accommodating slot for placing the battery 800 is formed between the side baffles 129 .

Further, the front baffle 127 (or the housing) of the battery placement module 120 is provided with a first through hole and a second through hole, the electrode block of the positive connection unit 121 is provided with a first slot 123, the negative connection unit The electrode block is provided with a second slot 124 , the first through hole communicates with the first slot 123 , and the second through hole communicates with the second slot 124 . When the battery placement module 120 moves closer to or away from the battery connection unit 210 , the front baffle 127 faces toward the battery connection unit 210 so that the connection posts are aligned with the through holes. In addition, the battery placement module 120 also includes a pressing piece 126, which can be arranged between the positive connection unit 121 and the negative connection unit 122. ), due to the limited space for placing the battery 800, the pressing sheet 126 is deformed by the pressing of the battery 800, and the pressing sheet 126 acts against the battery 800 to compress the battery 800.

In one implementation, as shown in Figure 6 and Figure 7, both the first connecting column 211 and the second connecting column 212 are connecting terminals, both connecting terminals can be connected to the on-off switching unit 220 through the connecting wire 132, and The two connection terminals are respectively used for inserting into the first slot 123 and the second slot 124 . Specifically, the connecting end of the first connecting post 211 is provided with an arc-shaped first gap, and the first slot 123 is provided with a first protrusion. When the first connecting post 211 enters the first slot 123, the first protrusion The portion can abut against the first notch so that the first protrusion engages with the first notch. Similarly, the connecting end of the second connecting column 212 is also provided with an arc-shaped second gap, and the second slot 124 is provided with a second protrusion. When the second connecting column 212 enters the second slot 124, the second The protrusion can abut against the second notch so that the second protrusion engages with the second notch.

In another implementation, as shown in FIGS. 8 to 10 , both the first connecting column 211 and the second connecting column 212 can be studs, and both the first slot 123 and the second slot 124 can be threaded slots. A second drive module 131 is also provided on the connection base 130, and the second drive module 131 may be a drive motor or a reducer (such as a gear 112 reducer and a worm reducer) and the like. The second driving module 131 is connected to the first connecting column 211 and the second connecting column 212 respectively, and the main control module 500 is connected to the second driving module 131 to control the operation of the second driving module 131. The second driving module 131 can drive the first The connecting post 211 is rotated so that the first connecting post 211 is threadedly connected to or separated from the first slot 123 , and the second connecting post 212 is driven to rotate so that the second connecting post 212 is threadedly connected to or separated from the second slot 124 . It can be seen that, in this way, the second driving module 131 can control the two connecting posts to be threadedly connected to the two slots respectively, so as to tighten the connecting posts and the slots and ensure the stable connection between the battery connecting unit 210 and the battery 800 .

Specifically, the second drive module 131 can adopt a worm gear reducer, then the second drive module 131 includes a second motor 133, a second worm wheel and a third worm wheel, and the second worm wheel and the third worm wheel can be arranged in different worm gear boxes 134 . The second motor 133 is respectively connected with the second worm wheel and the third worm wheel to drive the second worm wheel and the third worm wheel to rotate in opposite directions. The second worm gear meshes with the first connecting post 211 so that the second worm gear drives the first connecting post 211 to rotate, and the third worm gear meshes with the second connecting post 212 so that the third worm gear drives the second connecting post 212 to rotate. It can be understood that the first The rotation directions of the first connecting post 211 and the second connecting post 212 are also opposite.

Further, two electrical connection terminal pieces 136 and two insulating pieces 135 may be provided on the connection base 130, which are divided into a first electrical connection terminal piece, a second electrical connection terminal piece, a first insulating piece and a second insulating piece, The first electrical connection terminal piece is electrically connected with the first connecting column 211 and the on-off switching unit 220 respectively, the first electrical connection terminal piece can be specifically arranged on the first insulating sheet, and the second electrical connection terminal piece is respectively connected with the second connecting column 212 It is electrically connected with the on-off switching unit 220, and the second electrical connection terminal sheet can be specifically arranged on the second insulating sheet, while the first insulating sheet and the second insulating sheet are arranged on the connection seat 130, so that each electrical connection terminal sheet 136 can pass through The insulating sheet 135 is separated from the connection base 130 .

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the application is defined by the claims and their equivalents.

Claims

A battery management system, characterized in that it comprises:

A plurality of battery connection modules, each of which has a positive input terminal and a negative input terminal, and two adjacent battery connection modules are connected through the positive input terminal and the negative input terminal to realize multiple The battery connection modules are connected to form at least part of the charge-discharge series circuit, and the battery connection module includes a short circuit unit (230), a battery connection unit (210) for connecting to the battery (800), and an on-off switching unit (220) , the short-circuit unit (230) is connected in parallel with the battery connection unit (210), and both the short-circuit unit (230) and the battery connection unit (210) are connected to the The positive input terminal is electrically connected to the negative input terminal;

A charging and discharging module (300), electrically connected to the charging and discharging series circuit;

A battery monitoring module (400), connected to the battery connection unit (210) to monitor the condition of the battery;

The main control module (500) is respectively connected with the battery monitoring module (400) and the on-off switching unit (220) to control the operation of the on-off switching unit (220) according to the battery condition.
The battery management system according to claim 1, wherein the battery monitoring module (400) includes a power monitoring unit (410) and a charging and discharging testing unit (420), and the power monitoring unit (410) is connected to the The battery connection unit (210) is connected to monitor the power condition of the battery (800), and the charge and discharge test unit (420) is connected to the battery connection unit (210) to perform charge and discharge tests on the battery connection unit (210) , the main control module (500) is respectively connected with the electricity monitoring unit (410) and the charging and discharging testing unit (420).
The battery management system according to claim 2, further comprising a first on-off control module (610) and a second on-off control module (620), and the battery connection unit (210) includes a first positive terminal and the first negative terminal, the charge and discharge test unit (420) includes a first input terminal and a second input terminal, and the main control module (500) is connected to the first on-off control module (610) and the The second on-off control module (620) is connected to control the on-off of the first on-off control module (610) and the second on-off control module (620), and the first input terminal passes through the first The on-off control module (610) is connected to the first positive terminal, and the second input terminal is connected to the first negative terminal through the second on-off control module (620).
The battery management system according to claim 1, wherein the battery connection unit (210) includes a first positive terminal and a first negative terminal, and the on-off switching unit includes a first switch unit (221) and a second Two switch units (222), the short-circuit unit (230) includes a third input end and a fourth input end, the first switch unit (221) includes a first connection end and a second connection end, and the first connection The terminal is connected to the positive input terminal, and the main control module (500) is connected to the first switch unit (221) to control the connection between the second connection terminal and the first positive terminal and the third input terminal respectively. terminal switching connection, the second switch unit (222) includes a third connection terminal and a fourth connection terminal, the third connection terminal is connected to the negative input terminal, the main control module (500) is connected to the first The second switch unit (222) is connected to control the fourth connection terminal to be switched and connected to the first negative terminal and the fourth input terminal respectively.
The battery management system according to any one of claims 1 to 4, further comprising a communication module (700), the main control module (500) is connected to the communication module (700) to send the battery status to an external management platform.
The battery management system according to any one of claims 1 to 4, further comprising a battery box (100), the battery box (100) is provided with a plurality of battery workers for placing batteries (800) The battery connection unit (210) corresponds to the battery station one by one, and the battery station is provided with a displacement driving mechanism, and the displacement driving mechanism can drive the battery (800) close to the battery connection unit ( 210) to engage, or drive the battery (800) away from the battery connection unit (210) to separate.
The battery management system according to claim 6, wherein the displacement driving mechanism comprises a sliding frame (110) and a battery placement module (120) for placing the battery (800), and the sliding frame (110) is set On the battery station, the battery placement module (120) is slidingly connected to the sliding frame (110).
The battery management system according to claim 7, characterized in that a first driving module (111) and a gear (112) are arranged on the sliding frame (110), and the first driving module (111) and the The gear (112) is connected by transmission, the battery placement module (120) is provided with a rack, the gear (112) is used to mesh with the rack, the main control module (500) and the first The drive module (111) is connected to control the work of the first drive module (111), and the first drive module (111) can drive the gear (112) to rotate so that the gear (112) passes through the rack Driving the battery placement module (120) to slide along the sliding frame (110).
The battery management system according to claim 7, characterized in that, the battery station is provided with a connection seat (130), and the battery connection unit (210) includes a first connection post (211) and a second connection post (212), the first connecting column (211) and the second connecting column (212) are respectively connected to the positive input terminal and the negative input terminal through the on-off switching unit (220), so The first connection column (211) and the second connection column (212) are arranged on the connection seat (130), and the battery placement module (120) is provided with a positive connection unit (121) and a negative connection unit (122), the positive pole connection unit (121) is used to connect the positive pole of the battery (800), the negative pole connection unit (122) is used to connect the negative pole of the battery (800), and the positive pole connection unit ( 121) is provided with a first slot (123), the negative connection unit (122) is provided with a second slot (124), and the first slot (123) is used to connect the first connection column (211), the second slot (124) is used for connecting the second connecting column (212).
The battery management system according to claim 9, characterized in that, both the first connecting column (211) and the second connecting column (212) are studs, and the first slot (123) and the The second slots (124) are all threaded slots, and the connecting seat (130) is also provided with a second driving module (131), and the second driving module (131) is respectively connected to the first connecting column (211) is in transmission connection with the second connecting column (212), the main control module (500) is connected with the second driving module (131) to control the operation of the second driving module (131), the The second driving module (131) can drive the first connecting column (211) to rotate so that the first connecting column (211) is threadedly connected to or separated from the first slot hole (123), and drives the first connecting column (211) to The two connecting posts (212) are rotated so that the second connecting post (212) is threadedly connected to or separated from the second slot hole (124).