A digital energy storage module

Abstract

The present invention relates to a digital energy storage module, including a battery management unit, a digital switching device and a battery pack, a plurality of battery packs are connected in series to form a battery module, the digital switching device includes a drive board assembly and a power board assembly, the power board assembly is provided with an electronic switch and a docking female head, the electronic switch includes a first switch and a second switch, the drive board assembly is provided with a docking male head and a communication interface, the digital switching device includes a negative electrode interface, a positive electrode interface and an output interface, the positive electrode interface and the output interface form a main circuit through the first switch, the negative electrode interface and the output interface form a bypass circuit through the second switch, the digital energy storage module includes a negative wiring terminal and a positive wiring terminal, the negative wiring terminal is connected to the total negative electrode of the battery module, the positive wiring terminal is connected to the total positive electrode of the battery module through the main circuit, the negative electrode interface is connected to the negative wiring terminal, and the drive board assembly is used to control the opening and closing of the electronic switch. The present invention can bypass the faulty battery module to ensure that the system continues to operate normally and efficiently.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy, and in particular relates to a digital energy storage module. Background Art

[0002] For large energy storage systems, such as containerized energy storage power stations, the topology is that several traditional battery modules are connected in series to form a battery cluster, and then several battery clusters are connected in parallel to form a large energy storage power station. When a battery module in the energy storage system fails, if the system continues to supply power, the entire battery cluster where the battery module is located needs to be cut off, which greatly weakens the power supply capacity of the energy storage power station.

[0003] For small cabinet-type backup power supplies, such as communication base station backup power supplies, their architecture is mostly composed of several battery modules connected in series to form a power supply system. When a battery module in the backup power system fails, the entire system will be paralyzed and unable to power ICT equipment.

[0004] In summary, there is an urgent need to provide a digital energy storage module that can bypass faulty battery modules to ensure that the energy storage system continues to operate normally and efficiently. Summary of the invention

[0005] The purpose of the present invention is to provide a digital energy storage module which can bypass a faulty battery module and ensure that an energy storage system continues to operate normally and efficiently.

[0006] The above-mentioned object is achieved through the following technical scheme: a digital energy storage module, including a chassis, a battery management unit, a digital switching device and a plurality of battery packs, wherein a single battery pack is composed of a plurality of battery cells connected in series, and the plurality of battery packs are connected in series to form a battery module, the battery management unit is provided with a voltage detector and a temperature detector for collecting battery cell voltage and temperature information, the battery management unit is provided with an external communication interface, the digital switching device includes a drive board assembly and a power board assembly, the power board assembly is provided with an electronic switch and a docking female head, the electronic switch includes at least a first switch and a second switch, the drive board assembly is provided with a docking male head and a communication interface, the docking male head and the docking female head are plugged and connected to realize the electrical connection between the drive board assembly and the power board assembly, the digital switching device also includes a negative electrode interface, a positive electrode interface The positive electrode interface and the output interface are electrically connected through the first switch to form a main circuit, and the negative electrode interface and the output interface are electrically connected through the second switch to form a bypass circuit. The digital energy storage module is provided with a wiring terminal, and the wiring terminal includes a negative wiring terminal and a positive wiring terminal. The negative wiring terminal is connected to the total negative electrode of the battery module, and the positive wiring terminal is connected to the total positive electrode of the battery module through the main circuit. The positive electrode interface, the negative electrode interface and the output interface are respectively connected to the total positive electrode, the negative wiring terminal and the positive wiring terminal of the battery module. The battery management unit is connected to the drive board assembly signal through the communication interface. The drive board assembly is used to obtain information of the battery module and control the opening and closing of the electronic switch. The battery management unit, the digital switching device and the battery module are arranged in the chassis.

[0007] During application, the drive board assembly can obtain the battery cell voltage and temperature information of the battery module; when the battery module is normal, the drive board assembly controls the first switch of the main circuit to close and the second switch of the bypass circuit to open, the current flows through the main circuit, and the bypass circuit does not work. When the battery module is detected to report a fault, that is, the voltage and temperature information are abnormal, the drive board assembly sends a control signal to control the first switch of the main circuit to open and the second switch of the bypass circuit to close, and the bypass circuit acts on each battery module, so that the faulty battery module can be bypassed to ensure that the system continues to operate normally and efficiently.

[0008] In practical applications, the chassis is preferably a sheet metal chassis, which is a 19-inch standard chassis with a height of 3U and a depth of less than 500mm. The battery cell is a 3.2V100Ah lithium iron phosphate square aluminum shell battery, which is formed into a battery pack in the 8P1S method. Two battery packs are connected in series through a copper busbar to form a 16P1S electromagnetic module, which is fixed on the sheet metal chassis body and pressed with a pressure strip in the depth direction. The digital energy storage module also includes a status indicator light, which has a communication connection with the battery management unit. The wiring terminals are used to realize the series connection between the digital energy storage modules. The wiring terminals are connected from the side. The battery management unit, the digital switching device, the status indicator light, and the wiring terminals are all arranged on the front panel of the sheet metal chassis. The front panel of the sheet metal chassis is also provided with a grounding point and a handle for carrying. The handle is a folding handle that folds inward.

[0009] A further technical solution is that the chassis includes a box body and a front panel, the box body and the front panel are connected as a whole, and the box body is provided with a first positioning pin for positioning and installing the battery pack and a second positioning pin for positioning and installing the front panel.

[0010] A further technical solution is that the digital switching device is arranged on the front panel, the front panel is provided with a first heat dissipation square hole for heat dissipation of the digital switching device, and the two sides of the box are provided with second heat dissipation square holes. Such an arrangement is conducive to the heat dissipation of the digital energy storage module as a whole and improves its heat dissipation performance.

[0011] A further technical solution is that the wiring terminal is a 2P fence type high current wiring terminal, the total negative pole of the battery module and the negative pole interface are connected in parallel at the same contact of the wiring terminal, and the positive pole interface is electrically connected to the total positive pole of the battery module through a fuse.

[0012] A further technical solution is that the connection terminal and the external communication interface are separated on both sides of the box body. Such an arrangement facilitates wiring design and reduces interference of power lines on communication.

[0013] A further technical solution is that the electronic switch is composed of a MOS tube, the positive electrode interface, the negative electrode interface and the output interface respectively include a main copper bar, a bypass copper bar and an output copper bar, the surfaces of the main copper bar and the bypass copper bar are close to the first switch, and the surfaces of the bypass copper bar and the output copper bar are close to the second switch. The first switch and the second switch are symmetrically arranged on the power board assembly, and are respectively composed of a plurality of MOS tubes, and the number of MOS tubes in the power board assembly is determined according to the system overcurrent capacity.

[0014] A further technical solution is that the digital switching device further comprises a heat sink, which is arranged below the power board assembly, and the power board assembly, the main copper busbar, the bypass copper busbar, and the output copper busbar are respectively fastened to the countersunk holes of the heat sink by first screws. In this way, the setting of the heat sink is conducive to the heat dissipation of the present invention and maintains its good working performance.

[0015] A further technical solution is that the main copper bar, the bypass copper bar, the output copper bar and the first screw are separated by insulating particles, and the insulating particles are arranged in the countersunk holes on the heat sink. Such an arrangement ensures the safety of the present invention.

[0016] A further technical solution is that the main circuit and the bypass circuit are respectively provided with status display lights. With such arrangement, when the battery module works normally, the main circuit is powered on and the status display light of the circuit is on; when the battery module works abnormally, the bypass circuit is powered on and the status display light of the circuit is on, so that the working status of the present invention and the use of the battery module can be clearly reflected, which is convenient for workers to maintain and overhaul.

[0017] A further technical solution is that the digital switching device also includes a shell, the drive board assembly and the power board assembly are arranged in the shell, the shell is provided with a display window, the status display light is arranged in the display window, the shell is made of flame-retardant plastic, the display window is a groove provided in the shell, the display window is provided with a back-adhesive plastic sheet, and the back-adhesive plastic sheet is attached to the front of the groove of the shell. Preferably, four status display lights can be set in the display window, the two lights close to the main copper busbar are used for main circuit status display, and the two lights close to the bypass copper busbar are for bypass circuit status display, so that the working status is reflected more intuitively, and not only the display is obvious, but the back-adhesive plastic sheet can also play a role in protecting the status display light.

[0018] A further technical solution is that an insulating thermal pad is provided between the main copper bar, the bypass copper bar and the output copper bar and the radiator, and the lower surfaces of the main copper bar, the bypass copper bar and the output copper bar are in close contact with the insulating thermal pad. In this way, the upper surfaces of the main copper bar, the bypass copper bar and the output copper bar are in close contact with the electronic switch, and the lower surfaces are in close contact with the insulating thermal pad, and the three copper bars not only play a conductive role, but also a heat conductive role.

[0019] A further technical solution is that the shell is fixed to both sides of the radiator by second screws.

[0020] When a battery module fails, the bypass circuit of the present invention connects the battery modules, thereby bypassing the failed battery module, ensuring that the energy storage module system continues to operate normally and efficiently, and ensuring the peak shaving and valley filling of the energy storage system or the normal and efficient operation of the backup power supply of the communication base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 A schematic diagram of the internal electrical connections of a digital energy storage module according to an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the structure of a digital energy storage module involved in one embodiment of the present invention;

[0024] Figure 3 This is a structural schematic diagram of a digital energy storage module involved in one embodiment of the present invention with the cover plate removed;

[0025] Figure 4 A schematic diagram of the structure of a front panel involved in an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the internal structure of a digital energy storage module according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic structural diagram of a box body involved in one embodiment of the present invention;

[0028] Figure 7 A schematic structural diagram of a battery module circuit switching device according to an embodiment of the present invention;

[0029] Figure 8 It is an exploded schematic diagram of a battery module circuit switching device involved in one embodiment of the present invention;

[0030] Fig. 9 A cross-sectional schematic diagram of a battery module circuit switching device according to an embodiment of the present invention;

[0031] Fig.10 A schematic structural diagram of a power board assembly according to an embodiment of the present invention;

[0032] Fig.11 A schematic structural diagram of a driving plate assembly according to an embodiment of the present invention;

[0033] Fig.12 A schematic structural diagram of a radiator according to an embodiment of the present invention;

[0034] Fig.13 A schematic diagram of the circuit connection (working process of the digital switching device) of an energy storage system involved in one embodiment of the present invention.

[0035] In the figure:

[0036] 1 Chassis 2 Battery pack 3 Battery management unit 4 Digital switching device

[0037] 5 Status indicator 6 Terminal block 7 Handle 8 Fuse

[0038] 9 Adapter copper bar 10 Housing 11 Drive board assembly 12 First screw

[0039] 13 power board assembly 14 bypass copper bus 15 insulation thermal pad 16 heat sink

[0040] 17 output copper busbar 18 insulation particles 19 second screw 20 main copper busbar

[0041] 21 battery module 22 display window 61 negative terminal 62 positive terminal

[0042] 101 front panel 102 box 103 pressure strip

[0043] 206 total negative pole of battery module 207 total positive pole of battery module 301 external communication interface

[0044] 401 negative electrode interface 402 output interface 403 positive electrode interface

[0045] 1011 first heat dissipation square hole 1012 grounding point 1021 first positioning pin

[0046] 1022 second positioning pin 1023 second heat dissipation square hole 111 communication interface

[0047] 112 docking male connector 131 electronic switch 1311 first switch

[0048] 1312 Second switch 132 docking female connector 161 countersunk hole DETAILED DESCRIPTION

[0049] The present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention. In addition, those skilled in the art can make corresponding combinations of the features in the embodiments and in different embodiments in this document based on the description of this document.

[0050] The embodiments of the present invention are as follows, referring to Figures 1 to 4 , Figures 7 to 9 as well as Fig.11A digital energy storage module comprises a chassis 1, a battery management unit 3, a digital switching device 4 and a plurality of battery packs 2, wherein a single battery pack 2 is composed of a plurality of battery cells connected in series, and the plurality of battery packs 2 are connected in series to form a battery module 21, the battery management unit 3 is provided with a voltage detector and a temperature detector for collecting battery cell voltage and temperature information, the battery management unit 3 is provided with an external communication interface 301, the digital switching device 4 comprises a drive board assembly 11 and a power board assembly 13, the power board assembly 13 is provided with an electronic switch 131 and a docking female head 132, the electronic switch 131 at least comprises a first switch 1311 and a second switch 1312, the drive board assembly 11 is provided with a docking male head 112 and a communication interface 111, the docking male head 112 and the docking female head 132 are plug-connected to realize the electrical connection between the drive board assembly 11 and the power board assembly 13, the digital switching device 4 also comprises a negative electrode interface 401, a positive electrode interface 403 and an output interface 402, the The positive electrode interface 403 and the output interface 402 are electrically connected through the first switch 1311 to form a main circuit, and the negative electrode interface 401 and the output interface 402 are electrically connected through the second switch 1312 to form a bypass circuit. The digital energy storage module is provided with a wiring terminal 6, and the wiring terminal 6 includes a negative wiring terminal 61 and a positive wiring terminal 62. The negative wiring terminal 61 is connected to the total negative electrode 206 of the battery module, and the positive wiring terminal 62 is connected to the total positive electrode 207 of the battery module through the main circuit. The positive electrode interface 403, the negative electrode interface 401 and the output interface 402 are respectively connected to the total positive electrode, the negative wiring terminal 61 and the positive wiring terminal 62 of the battery module 2. The battery management unit 3 is connected to the drive board assembly 11 through the communication interface 111. The drive board assembly 11 is used to obtain information of the battery module 21 and control the opening and closing of the electronic switch 131. The battery management unit 3, the digital switching device 4 and the battery module 21 are arranged in the chassis 1.

[0051] During the application process, Figure 1 and Fig.13 , the driving board assembly 11 can obtain the cell voltage and temperature information of the battery module 21; under normal circumstances of the battery module 21, the driving board assembly 11 controls the first switch 1311 of the main circuit to be closed, and the second switch 1312 of the bypass circuit to be disconnected, the current flows through the main circuit, and the bypass circuit does not work. When it is detected that the battery module 21 reports a fault, that is, the voltage and temperature information are abnormal, the driving board assembly 11 sends a control signal to control the first switch 1311 of the main circuit to be disconnected, and the second switch 1312 of the bypass circuit to be closed, and the bypass circuit plays a role in each battery module 21, so that the faulty battery module 21 can be bypassed to ensure that the system continues to operate normally and efficiently.

[0052] In practical applications, such as Figures 2 to 5The chassis 1 is preferably a sheet metal chassis 1, which is a 19-inch standard chassis 1 with a height of 3U and a depth of less than 500mm. The battery cell is a 3.2V100Ah lithium iron phosphate square aluminum shell battery, which is formed into a battery pack 2 by the 8P1S method. Two battery packs 2 are connected in series through the transfer copper bar 9 to form a 16P1S electromagnetic module, which is fixed on the body 102 of the sheet metal chassis 1 and pressed by a pressure strip 103 in the depth direction. The digital energy storage module also includes a status indicator 5, which has a communication connection with the battery management unit 3. The terminal 6 is used to realize the series connection between the digital energy storage modules. The terminal 6 is connected from the side. The battery management unit 3, the digital switching device 4, the status indicator 5, and the terminal 6 are all arranged on the front panel 101 of the sheet metal chassis 1. The front panel 101 of the sheet metal chassis 1 is also provided with a grounding point 1012 and a handle 7 for carrying. The handle 7 is a folding handle 7 that folds inward.

[0053] Based on the above embodiment, in another embodiment of the present invention, Figures 2 to 6 The chassis 1 includes a box body 102 and a front panel 101, and the box body 102 and the front panel 101 are connected as a whole. The box body 102 is provided with a first positioning pin 1021 for positioning and installing the battery pack 2 and a second positioning pin 1022 for positioning and installing the front panel 101.

[0054] Based on the above embodiment, in another embodiment of the present invention, Figure 3 and Figure 6 The digital switching device 4 is arranged on the front panel 101, and the front panel 101 is provided with a first heat dissipation square hole 1011 for dissipating heat of the digital switching device 4, and the two sides of the box body 102 are provided with second heat dissipation square holes 1023. Such an arrangement is beneficial to the overall heat dissipation of the digital energy storage module and improves its heat dissipation performance.

[0055] Based on the above embodiment, in another embodiment of the present invention, Figure 1 and Figure 4 The wiring terminal 6 is a 2P fence type high current wiring terminal 6, the total negative electrode 206 of the battery module and the negative electrode interface 401 are connected in parallel at the same contact point of the wiring terminal 6, and the positive electrode interface 403 is electrically connected to the total positive electrode 207 of the battery module through the fuse 8.

[0056] Based on the above embodiment, in another embodiment of the present invention, Figure 2 The connection terminal 6 and the external communication interface 301 are separated on both sides of the box 102. Such an arrangement facilitates wiring design and reduces interference of power lines on communication.

[0057] Based on the above embodiment, in another embodiment of the present invention, Figures 8 to 11, the electronic switch 131 is composed of MOS tubes, the positive electrode interface 403, the negative electrode interface 401 and the output interface 402 respectively include the main copper bar 20, the bypass copper bar 14 and the output copper bar 17, the main copper bar 20 and the bypass copper bar 14 are close to the first switch 1311, and the bypass copper bar 14 and the output copper bar 17 are close to the second switch 1312. The first switch 1311 and the second switch 1312 are symmetrically arranged on the power board assembly 13, and are respectively composed of a plurality of MOS tubes. The number of MOS tubes in the power board assembly 13 is determined according to the system overcurrent capacity.

[0058] Based on the above embodiment, in another embodiment of the present invention, Figure 7 , 8 and Fig.12 The digital switching device 4 further includes a heat sink 16, which is disposed below the power board assembly 13. The power board assembly 13, the main copper busbar 20, the bypass copper busbar 14, and the output copper busbar 17 are respectively fastened to the countersunk holes 161 of the heat sink 16 by first screws 12. In this way, the arrangement of the heat sink 16 is conducive to the heat dissipation of the present invention and maintains its good working performance.

[0059] Based on the above embodiment, in another embodiment of the present invention, Figure 8 The main copper bar 20, the bypass copper bar 14, the output copper bar 17 and the first screw 12 are separated by insulating particles 18, and the insulating particles 18 are arranged in the countersunk holes 161 on the heat sink 16. Such an arrangement ensures the safety of the present invention.

[0060] On the basis of the above embodiment, in another embodiment of the present invention, the main circuit and the bypass circuit are respectively provided with status display lights. In this way, when the battery module 21 works normally, the main circuit is powered on, and the status display light of the circuit is on; when the battery module 21 works abnormally, the bypass circuit is powered on, and the status display light of the circuit is on. In this way, the working state of the present invention and the use of the battery module 21 can be clearly reflected, which is convenient for workers to maintain and repair.

[0061] Based on the above embodiment, in another embodiment of the present invention, Figure 7 and Figure 8The digital switching device 4 also includes a housing 10, the drive board assembly 11 and the power board assembly 13 are arranged in the housing 10, the housing 10 is provided with a display window 22, the status display light is arranged in the display window 22, the housing 10 is made of flame-retardant plastic, the display window 22 is a groove provided in the housing 10, the display window 22 is provided with a back-adhesive plastic sheet, and the back-adhesive plastic sheet is attached to the front of the groove of the housing 10. Preferably, the display window 22 can be provided with four status display lights, the two lights close to the main copper bus 20 are used for main circuit status display, and the two lights close to the bypass copper bus 14 are for bypass circuit status display, so that the working condition is reflected more intuitively, and not only the display is obvious, but the back-adhesive plastic sheet can also play a role in protecting the status display light 5.

[0062] Based on the above embodiment, in another embodiment of the present invention, Figure 8 and Fig. 9 An insulating thermal pad 15 is provided between the main copper bar 20, the bypass copper bar 14, the output copper bar 17 and the radiator 16, and the lower surfaces of the main copper bar 20, the bypass copper bar 14 and the output copper bar 17 are in close contact with the insulating thermal pad 15. In this way, the upper surfaces of the main copper bar 20, the bypass copper bar 14 and the output copper bar 17 are in close contact with the electronic switch 131, and the lower surfaces are in close contact with the insulating thermal pad 15, and the three copper bars not only play a conductive role, but also a heat conductive role.

[0063] Based on the above embodiment, in another embodiment of the present invention, Figure 8 The housing 10 is fixed to both sides of the radiator 16 by second screws 19 .

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A digital energy storage module, characterized in that: It includes a chassis, a battery management unit, a digital switching device and multiple battery packs, wherein a single battery pack is composed of multiple battery cells connected in series, and the multiple battery packs are connected in series to form a battery module, the battery management unit is provided with a voltage detector and a temperature detector for collecting battery cell voltage and temperature information, the battery management unit is provided with an external communication interface, the digital switching device includes a drive board assembly and a power board assembly, the power board assembly is provided with an electronic switch and a docking female head, the electronic switch includes at least a first switch and a second switch, the drive board assembly is provided with a docking male head and a communication interface, the docking male head and the docking female head are plug-connected The digital switching device further comprises a negative electrode interface, a positive electrode interface and an output interface, wherein the positive electrode interface and the output interface are electrically connected through the first switch to form a main circuit, and the negative electrode interface and the output interface are electrically connected through the second switch to form a bypass circuit, and the digital energy storage module is provided with a wiring terminal, wherein the wiring terminal comprises a negative wiring terminal and a positive wiring terminal, wherein the negative wiring terminal is connected to the total negative electrode of the battery module, and the positive wiring terminal is connected to the total positive electrode of the battery module through the main circuit, and the positive electrode interface, the negative electrode interface and the output interface are respectively connected to the total positive electrode of the battery module. , the negative terminal and the positive terminal are connected, the battery management unit is connected to the drive board assembly signal through the communication interface, the drive board assembly is used to obtain the information of the battery module and control the opening and closing of the electronic switch, the battery management unit, the digital switching device and the battery module are arranged in the chassis, the chassis includes a box body and a front panel, the box body and the front panel are connected as a whole, the box body is provided with a first positioning pin for positioning and installing the battery pack and a second positioning pin for positioning and installing the front panel, the terminal is a 2P fence type high current terminal, the total negative electrode and the negative electrode interface of the battery module are connected The same contact of the line terminals is connected in parallel, the positive electrode interface is electrically connected to the total positive electrode of the battery module through a fuse, the electronic switch is composed of a MOS tube, the positive electrode interface, the negative electrode interface and the output interface respectively include a main copper bar, a bypass copper bar and an output copper bar, the surfaces of the main copper bar and the bypass copper bar are close to the first switch, and the surfaces of the bypass copper bar and the output copper bar are close to the second switch, the digital switching device also includes a radiator, the radiator is arranged below the power board assembly, and the power board assembly, the main copper bar, the bypass copper bar and the output copper bar are respectively fastened to the countersunk holes of the radiator by first screws.

2. The digital energy storage module according to claim 1, characterized in that: The digital switching device is arranged on the front panel, the front panel is provided with a first heat dissipation square hole for heat dissipation of the digital switching device, and the two sides of the box body are provided with second heat dissipation square holes.

3. The digital energy storage module according to claim 1, characterized in that: The connection terminals and the external communication interface are located on two sides of the box.

4. The digital energy storage module according to claim 3, characterized in that: The main circuit and the bypass circuit are respectively provided with status display lights.

5. The digital energy storage module according to claim 4, characterized in that: The digital switching device also includes a shell, the drive board assembly and the power board assembly are arranged in the shell, the shell is provided with a display window, the status display light is arranged in the display window, the shell is made of flame-retardant plastic, the display window is a groove set in the shell, the display window is provided with a back-adhesive plastic sheet, and the back-adhesive plastic sheet is attached to the front side of the groove of the shell.

6. The digital energy storage module according to claim 1, characterized in that: An insulating thermal pad is provided between the main copper bar, the bypass copper bar, the output copper bar and the radiator, and the lower surfaces of the main copper bar, the bypass copper bar and the output copper bar are in close contact with the insulating thermal pad.

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