Stacked energy storage system and light storage device

Abstract

The utility model is suitable for the technical field of energy storage, and provides a stacked energy storage system and light storage equipment. The stacked energy storage system comprises a plurality of battery packs, a plurality of battery management systems in one-to-one correspondence with the plurality of battery packs, and a switch module K, each battery management system comprises a first diode D1, the anode of which is connected with the anode of the corresponding battery pack, and the cathode of which is connected with a power utilization system and the first end of the switch module K through an auxiliary circuit; the auxiliary circuit is used for conducting the power utilization system when the switch module K is closed and turning off the power utilization system when the switch module K is disconnected; and the anode of the second diode D2 is connected with the second end of the switch module K, and the cathode of the second diode D2 is connected with the cathode of the corresponding battery pack. According to the embodiment of the invention, a plurality of battery management systems can be controlled to be turned on or turned off by one key.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy storage, and particularly relates to a stacked energy storage system and a light storage device. BACKGROUND

[0002] With the increasing demand of users for capacity and power density, battery stacking in parallel has become a key means to improve the battery capacity of an energy storage system. In a stacked energy storage system, each battery pack is an independent individual, and each battery management system is configured. In order to save the power consumption of each battery management system, a switch module is designed when designing the battery management system. In the traditional design, when multiple battery management systems need to be turned on or turned off, the keys of each battery management system need to be pressed in turn. In this way, the process of each on-off is very cumbersome, and the user experience is poor. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the application provide a stacked energy storage system and a light storage device, which can control multiple battery management systems to be turned on or turned off by one key.

[0004] To achieve the above-mentioned purpose, the first aspect of the application provides a stacked energy storage system, comprising a plurality of battery packs, a plurality of battery management systems corresponding to the plurality of battery packs one by one, and a switch module K; each battery management system comprises: a first diode D1, the anode of which is connected with the positive electrode of the corresponding battery pack, and the cathode thereof is connected with a respective power utilization system and the first end of the switch module K through an auxiliary circuit; the auxiliary circuit is used for turning on the power utilization system when the switch module K is closed, and turning off the power utilization system when the switch module K is disconnected; a second diode D2, the anode of which is connected with the second end of the switch module K, and the cathode thereof is connected with the negative electrode of the corresponding battery pack.

[0005] In some embodiments of the first aspect, when the switch module K is turned on, each battery management system and the corresponding battery pack and the switch module K form a drive loop, so that the auxiliary circuit turns on the power utilization system.

[0006] In some embodiments of the first aspect, when the switch module K is disconnected, each auxiliary circuit is disconnected from the drive loop through the first diode D1 of the battery management system and the pull-up of the corresponding battery pack, so that the auxiliary circuit turns off the power utilization system.

[0007] In some embodiments of the first aspect, the auxiliary circuit comprises: a bias circuit and a switching device connected with the bias circuit; the bias circuit is used for providing working voltage for the switching device; and the switching device is used for turning on or turning off the power utilization system.

[0008] In some embodiments of the first aspect, the biasing circuit comprises a first resistor and a second resistor, and a switching device; a first end of the first resistor is connected to a first end of the switching device, and a second end of the first resistor is connected to a first end of the second resistor and a second end of the switching device, respectively.

[0009] In some embodiments of the first aspect, the switching device is a PNP triode, the first end of the switching device is the emitter of the PNP triode, and the second end of the switching device is the base of the PNP triode.

[0010] In some embodiments of the first aspect, the switching device is a MOS tube, and the first end of the switching device is the source of the MOS tube.

[0011] In some embodiments of the first aspect, the switching module K comprises a switch base and a button, the switch base is configured with a switch triggering module, and the button is used to trigger the switch triggering module so as to close or open the switching module K.

[0012] In some embodiments of the first aspect, the power consumption systems of the battery management systems are connected through bus bars.

[0013] In some embodiments of the first aspect, each battery pack comprises a plurality of single batteries connected in series.

[0014] The second aspect of the embodiments of the present application provides a light storage device comprising the stacked energy storage system of the first aspect.

[0015] In the embodiments of the present application, the stacked energy storage system comprises a plurality of battery packs, a plurality of battery management systems corresponding to the plurality of battery packs one by one, and a switching module K, each battery management system comprises: a first diode D1, an anode of which is connected to a positive electrode of a corresponding battery pack, and a cathode of which is connected to a power consumption system and a first end of the switching module K through an auxiliary circuit; an auxiliary circuit, which is used to turn on the power consumption system when the switching module is closed and turn off the power consumption system when the switching module is opened; and a second diode D2, an anode of which is connected to a second end of the switching module K, and a cathode of which is connected to a negative electrode of the corresponding battery pack. In this way, the plurality of battery management systems can be controlled at the same time through the closing or opening of the switching module K, realizing the function of one-key control of the opening or closing of the plurality of battery management systems.

[0016] Moreover, through the first diode D1 and the second diode D2, the situation that the battery management systems are turned on due to the mutual charging and discharging between different battery packs in the case that the switching module K is opened can be avoided, and the reliability of the closing of the plurality of battery management systems can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on these drawings.

[0018] Figure 1 is a structural schematic diagram of a stacked energy storage system provided by an embodiment of the present application Figure 1 ;

[0019] Figure 2 is a structural schematic diagram of an auxiliary circuit provided by an embodiment of the present application

[0020] Figure 3 is a structural schematic diagram of a stacked energy storage system provided by an embodiment of the present application Figure 2 ;

[0021] Figure 4 is a structural schematic diagram of a light storage device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0026] With the increasing demand of users for capacity and power density, battery stacking in parallel has become a key means to improve the capacity of energy storage systems. In a stacked energy storage system, each battery pack is an independent individual, and each battery management system is configured. In order to save the power consumption of each battery management system, a switch module is designed when designing the battery management system. In the traditional design, when multiple battery management systems need to be turned on or turned off, the keys of each battery management system need to be pressed in turn. In this way, the process of each startup and shutdown is very cumbersome, and the user experience is poor.

[0027] In view of this, the present application proposes a new stacked energy storage system, which can realize the function of one-key control of multiple battery management systems to start or stop.

[0028] In order to illustrate the technical solutions of the present application, the following will be illustrated by specific embodiments.

[0029] Please refer to Figure 1 , Figure 1 The schematic diagram of the stacked energy storage system provided by the present application is shown. Among them, the stacked energy storage system refers to the connection between multiple battery packs 101 in the energy storage system in parallel.

[0030] Among them, the stacked energy storage system 10 can include:

[0031] Multiple battery packs 101( Figure 1 N battery packs 101 are shown, and in actual application, N can be a positive integer greater than or equal to 2), a plurality of battery management systems 102 corresponding to the plurality of battery packs 101, and a switch module K.

[0032] Among them, each battery management system 102 can include:

[0033] The anode of the first diode D1 is connected with the positive electrode of the corresponding battery pack 101, and the cathode is connected with the power utilization system 1022 and the first end of the switch module K through the auxiliary circuit 1021.

[0034] The auxiliary circuit 1021 is used to turn on the power utilization system 1022 when the switch module K is closed, and turn off the power utilization system 1022 when the switch module K is disconnected.

[0035] The anode of the second diode D2 is connected with the second end of the switch module K, and the cathode is connected with the negative electrode of the corresponding battery pack 101.

[0036] In some embodiments of the present application, as Figure 1 shown, the negative electrode of the battery pack 101 can be grounded. The first end of the power utilization system 1022 is connected with the auxiliary circuit 1021, and the second end can be grounded.

[0037] In the embodiments of the present application, by closing or opening the switch module K, the power supply systems 1022 of multiple battery management systems 102 can be controlled at the same time, realizing the function of one-key control of multiple battery management systems 102 to start or stop.

[0038] In some embodiments of the present application, when the switch module K is turned on, each battery management system 102 forms a drive loop with the corresponding battery pack 101 and the switch module K, so that the auxiliary circuit 1021 turns on the power supply system 1022. At this time, the battery pack 101 can supply power to the power supply system 1022, and the entire battery management system 102 can operate normally.

[0039] In some embodiments of the present application, when the switch module K is turned off, each auxiliary circuit 1021 is disconnected from the drive loop through the first diode D1 of the battery management system 102 and the pull-up of the corresponding battery pack 101, so that the auxiliary circuit 1021 turns off the power supply system 1022. At this time, the battery management system 102 has no power supply circuit, the power supply system 1022 does not work, and the battery management system 102 is in a shutdown state.

[0040] It can be understood that multiple battery packs 101 are used together, and each battery pack 101 is an independent individual. If there is no first diode D1 and second diode D2, because there is a voltage gap between multiple battery packs 101, the positive electrodes of multiple battery packs 101 are connected together through the auxiliary circuit 1021 of the battery management system 102, and the negative electrodes are short-circuited together. At this time, there will be mutual charging and discharging between different battery packs 101, so that the auxiliary circuit 1021 has a drive loop, and then the power supply system 1022 of the battery management system 102 is powered on, and the battery management system 102 is activated. Therefore, through the first diode D1 and the second diode D2, the situation that the battery management system is turned on due to mutual charging and discharging between different battery packs under the condition that the switch module K is turned off can be avoided, and the reliability of multiple battery management systems being turned off can be ensured.

[0041] The specific structure of the auxiliary circuit can be selected according to actual conditions.

[0042] In some embodiments of the present application, please refer to Figure 2 The auxiliary circuit can include a bias circuit and a switching device connected to the bias circuit.

[0043] The bias circuit can be used to provide a working voltage for the switching device.

[0044] The switching device Q can be used to turn on or turn off the power supply system.

[0045] The specific structure of the bias circuit can be selected according to actual conditions.

[0046] In some embodiments of the present application, the auxiliary circuit can include a first resistor R1 and a second resistor R2, and a switching device Q. That is, the biasing circuit can include the first resistor R1 and the second resistor R2.

[0047] A first end of the first resistor R1 is connected to a first end of the switching device Q, and a second end of the first resistor R1 is connected to a first end of the second resistor R2 and a second end of the switching device Q, respectively.

[0048] Correspondingly, a first end of the second resistor R2 can be connected to the second end of the switching device Q, and a second end of the second resistor R2 can be connected to the switching module K.

[0049] Thus, the biasing circuit can achieve voltage division and provide a suitable and safe operating voltage for the switching device.

[0050] It should be noted that the first resistor R1 can be one resistor or a plurality of resistors connected in series. Similarly, the second resistor R2 can be one resistor or a plurality of resistors connected in series. The present application does not limit this.

[0051] In some embodiments of the present application, as shown in Figure 3 The above switching device Q can be a positive-negative-positive (PNP) transistor Q1, the first end of the switching device Q is the emitter of the PNP transistor, and the second end of the switching device Q is the base of the PNP transistor.

[0052] In combination Figure 3 When the switching module K is open, the auxiliary circuit 1021 composed of the PNP transistor Q1, the first resistor R1, and the second resistor R2 is pulled up by the first diode D1 and the battery pack 101, so that the PNP transistor Q1 is turned off, and the battery management system 102 is in a shutdown state. When the switching module K is closed, the current passes through the auxiliary circuit 1021 composed of the PNP transistor Q1, the first resistor R1, and the second resistor R2 from the positive pole of the battery pack 101, the first diode D1, the PNP transistor Q1, the second resistor R2, the switching module K, the second diode D2, and returns to the negative pole of the battery pack 101, forming a driving loop. At this time, the PNP transistor Q1 is turned on, the use system 1022 can operate normally, and the battery management system 102 realizes one-key start-up.

[0053] In some embodiments of the present application, the switch device Q can also be a Metal Oxide Semiconductor Field Effect Transistor (MOSFET, MOS) tube, the first end of the switch device Q is the source of the MOS tube, and the second end of the switch device Q is the gate of the MOS tube.

[0054] Of course, the auxiliary circuit can also include other peripheral circuit devices. Moreover, the switch device Q is not limited to the above-mentioned various types of transistors, and the bias circuit is not limited to the first resistor R1 and the second resistor R2. In other embodiments, devices with similar functions can also be used to realize the function of the auxiliary circuit. The present application does not limit this.

[0055] In some embodiments of the present application, the switch module K can include a switch seat, a key, and a switch triggering module arranged on the switch seat. The key is used to trigger the switch triggering module, so that the switch module K is closed or opened. In turn, the power-on or shutdown of multiple battery management systems can be triggered by the key.

[0056] In other embodiments, the switch module K can also be a touch switch, a sliding switch, or a rotary switch, and the present application does not limit this.

[0057] In some embodiments of the present application, the power consumption systems 102 of the various battery management systems 102 can be connected to each other through bus bars.

[0058] In some embodiments of the present application, each battery pack 101 can include one single battery or multiple single batteries connected in series. The number of single batteries can be selected according to the power consumption demand, and the present application does not limit this.

[0059] As shown in FIG. 1, the present application also provides a light storage device 1, which includes the above-mentioned stacked energy storage system 10. Figure 4 In this way, through the stacked battery packs 101, the light storage device 1 can improve the battery capacity and meet the increasing demand of users for capacity and power density. Through the switch module K of the stacked energy storage system 10, the function of one-key control of multiple battery management systems 102 can be realized.

[0060] In some embodiments of the present application, the light storage device 1 can also include a photovoltaic panel, a heat dissipation device, a display assembly, and other devices, and the present application does not limit this.

[0061]

[0062] ​Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or software. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0063] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0064] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0065] In the embodiments provided in the present application, it should be understood that the disclosed device / display control device and method can be implemented in other ways. For example, the device / display control device embodiments described above are only schematic, for example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0066] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0067] In addition, each of the function units in each of the embodiments of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0068] The integrated module / unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer-readable storage medium. When the processor executes the computer program, the steps of each method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or some intermediate forms, etc. The computer-readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0069] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A stacked energy storage system, characterized by, The energy storage system comprises a plurality of battery packs, a plurality of battery management systems corresponding to the plurality of battery packs one by one, and a switch module K; Each of the battery management systems comprises: a first diode D1, an anode of which is connected to a positive pole of the corresponding battery pack, and a cathode of which is connected to a power utilization system and a first end of the switch module K through an auxiliary circuit respectively; the auxiliary circuit is configured to turn on the power utilization system when the switch module K is closed, and turn off the power utilization system when the switch module K is disconnected; a second diode D2, an anode of which is connected to a second end of the switch module K, and a cathode of which is connected to a negative pole of the corresponding battery pack.

2. The stacked energy storage system of claim 1, wherein, When the switch module K is turned on, each of the battery management systems forms a driving loop with the corresponding battery pack and the switch module K, so that the auxiliary circuit turns on the power utilization system.

3. The stacked energy storage system of claim 2, wherein, When the switch module K is closed, each of the auxiliary circuits disconnects the driving loop through the first diode D1 of the battery management system and the pull-up of the corresponding battery pack, so that the auxiliary circuit turns off the power utilization system.

4. The stacked energy storage system of claim 1, wherein, The auxiliary circuit comprises a first resistor R1, a second resistor R2, and a switching device. A first end of the first resistor R1 is connected to a first end of the switching device, and a second end of the first resistor R1 is connected to a first end of the second resistor R2 and a second end of the switching device respectively.

5. The stacked energy storage system of claim 4, wherein, The switching device is a PNP triode, and the first end of the switching device is the emitter of the PNP triode.

6. The stacked energy storage system of claim 4, wherein, The switching device is a MOS tube, and the first end of the switching device is the source of the MOS tube.

7. The stacked energy storage system of any of claims 1-6, wherein, The switch module K comprises a switch seat and a key, the switch seat is configured with a switch triggering module, and the key is used to trigger the switch triggering module, so that the switch module K is closed or disconnected.

8. The stacked energy storage system of any of claims 1-6, wherein, The power utilization systems of the battery management systems are connected through a bus.

9. The stacked energy storage system of any of claims 1-6, wherein, Each of the battery packs comprises a plurality of single batteries connected in series.

10. A light storage device, characterized by The energy storage system comprises a plurality of battery packs, a plurality of battery management systems corresponding to the plurality of battery packs one by one, and a switch module K;

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