Energy storage system

Abstract

The embodiment of the utility model provides an energy storage system which comprises a plurality of battery cells, each battery cell is provided with a liquid outlet, a liquid inlet and the liquid outlet are located in the two sides, in the first horizontal direction, of each battery cell, at least two battery cells are arranged on the same layer in the second horizontal direction, and at least two battery cells are arranged in a layered mode in the vertical direction; the liquid container is communicated with the liquid inlet and is configured to provide regeneration liquid for the battery cell, and the regeneration liquid comprises at least one of electrolyte and a regeneration reagent; and the first driving pump is communicated with the liquid outlet and is configured to drive the regenerated liquid in the liquid container to enter the battery cell or drive the electrolyte in the battery cell to be discharged out of the battery cell. The energy storage system is high in liquid supplementing and liquid discharging efficiency.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to an energy storage system. Background Technology

[0002] The individual batteries of the station-style energy storage system can be directly installed in the building, making the layout more flexible, the space utilization rate higher, and the system operation and maintenance more convenient.

[0003] In related technologies, fluid passages are added to the top cover of a single battery cell to enable the draining and replenishment of electrolyte, thereby restoring the capacity of the single battery cell. However, the liquid transport passage of the single battery cell is located on its top cover plate, and after long-term cycling, the electrolyte is deposited at the bottom of the single battery cell under the action of gravity. Therefore, it is difficult to drain the electrolyte and it is not convenient to drain and replenish the battery at the same time. Utility Model Content

[0004] Based on this, embodiments of this application provide an energy storage system to address the shortcomings of related technologies.

[0005] The energy storage system provided in this application embodiment includes:

[0006] Several battery cells, each battery cell having a drain port and a drain port, the drain port and the drain port being located on both sides of the battery cell along a first horizontal direction;

[0007] A liquid container, connected to an inlet, is configured to provide regenerative liquid to the battery cell;

[0008] The first drive pump is connected to the drain port and is configured to drive the regenerated liquid in the liquid container into the cell, or drive the electrolyte in the cell to be discharged from the cell.

[0009] In one possible implementation, the energy storage system further includes a second drive pump, the cell having an exhaust port, the second drive pump being connected to the exhaust port and configured to drive flammable gas within the cell to exit the cell.

[0010] In one possible implementation, the energy storage system further includes a gas container, the battery cell also has an air inlet, the gas container is connected to the air inlet and is configured to supply flame-retardant gas to the battery cell, and a second drive pump is also configured to drive the flame-retardant gas in the gas container into the battery cell.

[0011] In one possible implementation, the air inlet and exhaust outlet are located on opposite sides of the cell along a first horizontal direction.

[0012] In one possible implementation, the air inlet and liquid inlet are located on one side of the battery cell along the first horizontal direction, and the exhaust port and liquid outlet are located on the other side of the battery cell along the first horizontal direction.

[0013] In one possible implementation, the liquid inlet is located on the upper side of the cell, and the liquid outlet is located on the lower side of the cell.

[0014] In one possible implementation, the liquid inlet and liquid outlet are located on the lower side of the cell, while the air inlet and air outlet are located on the upper side of the cell.

[0015] In one possible implementation, at least two cells are arranged in the same layer along the second horizontal direction, and at least two cells are arranged in layers along the vertical direction.

[0016] The energy storage system also includes a piping assembly, which includes a main drain pipe, several branch drain pipes and several branch drain pipes. The branch drain pipes are set one-to-one with the drain outlets. Each layer of cells is equipped with a branch drain pipe. Each cell on the same layer is connected to the same branch drain pipe through the corresponding branch drain pipe. Each branch drain pipe is connected to the main drain pipe, and the main drain pipe is connected to the first drive pump.

[0017] Alternatively, the piping assembly includes a main inlet pipe, several branch inlet pipes, and several branch inlet pipes. Each branch inlet pipe is corresponding to an inlet port. Each cell in the same layer is provided with one branch inlet pipe. Each cell in the same layer is connected to the same branch inlet pipe through its corresponding branch inlet pipe. Each branch inlet pipe is connected to the main inlet pipe, which is connected to the liquid container.

[0018] In one possible implementation, the piping assembly further includes a main exhaust pipe, several exhaust branch pipes, and several exhaust vents. Each exhaust branch pipe is configured to correspond one-to-one with an exhaust port. Each layer of battery cell is provided with an exhaust branch pipe. Each battery cell located on the same layer is connected to the same exhaust branch pipe through a corresponding exhaust branch pipe. Each exhaust branch pipe is connected to the main exhaust pipe, and the main exhaust pipe is connected to the second drive pump.

[0019] The piping assembly also includes a main air intake pipe, several branch air intake pipes, and several branch air intake pipes. Each branch air intake pipe is set up in a one-to-one correspondence with the air intake port. Each layer of battery cell is equipped with one branch air intake pipe. Each battery cell located on the same layer is connected to the same branch air intake pipe through the corresponding branch air intake pipe. Each branch air intake pipe is connected to the main air intake pipe, and the main air intake pipe is connected to the gas container.

[0020] In one possible implementation, the energy storage system further includes a multi-way valve assembly, which includes at least one of a first multi-way valve, a second multi-way valve, a third multi-way valve, and a fourth multi-way valve. Each drain branch pipe is connected to a corresponding drain branch pipe through the first multi-way valve, each inlet branch pipe is connected to a corresponding inlet branch pipe through the second multi-way valve, each exhaust branch pipe is connected to a corresponding exhaust branch pipe through the third multi-way valve, and each air intake branch pipe is connected to a corresponding air intake branch pipe through the fourth multi-way valve.

[0021] In one possible implementation, the energy storage system also includes a battery management component, with a first multi-way valve, a second multi-way valve, a third multi-way valve, and a fourth multi-way valve all electrically connected to the battery management component.

[0022] In one possible implementation, the energy storage system further includes a flow meter assembly, which includes at least one of a first flow meter, a second flow meter, a third flow meter, and a fourth flow meter. The first flow meter is located at the end of the drain manifold facing the first drive pump, the second flow meter is located at the end of the inlet manifold facing the liquid container, the third flow meter is located at the end of the exhaust manifold facing the second drive pump, and the fourth flow meter is located at the end of the gas inlet manifold facing the gas container.

[0023] In one possible implementation, the energy storage system further includes a control valve assembly, which includes at least one of a first control valve, a second control valve, a third control valve, and a fourth control valve. The first control valve is located at the end of the drain manifold facing the first drive pump, the second control valve is located at the end of the inlet manifold facing the liquid container, the third control valve is located at the end of the exhaust manifold facing the second drive pump, and the fourth control valve is located at the end of the gas inlet manifold facing the gas container.

[0024] The energy storage system of this embodiment includes a battery cell, a liquid container, and a first drive pump. The battery cell includes a drain port and a liquid inlet. The drain port is used to discharge old electrolyte from the battery cell, and the liquid inlet is used to replenish electrolyte, regeneration reagents, and other regenerative liquids into the battery cell. The liquid container is used to supply electrolyte, regeneration reagents, and other regenerative liquids to the battery cell. The first drive pump is used to drive the electrolyte, regeneration reagents, and other regenerative liquids into the battery cell or to drive the old electrolyte out of the battery cell. By setting the drain port and the liquid inlet on both sides of the battery cell in a first horizontal direction, the drain port on one side of the battery cell discharges old electrolyte, and the liquid inlet on the other side of the battery cell injects fresh electrolyte. The two flow in and out, thereby improving the efficiency of draining and replenishing electrolytes. Moreover, during draining, the old electrolyte in the battery cell can flow horizontally without having to overcome gravity to flow upwards, thereby improving the efficiency of draining.

[0025] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that the energy storage system provided by this application can solve, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] Figure 1 This is a schematic diagram of the energy storage system provided in the embodiments of this application;

[0028] Figure 2 A schematic diagram of the structure of the battery cell, pipeline assembly, and multi-way valve assembly in the energy storage system provided in the embodiments of this application;

[0029] Figure 3 for Figure 1 The left view;

[0030] Figure 4 for Figure 1 Top view.

[0031] Figure label:

[0032] 100-Battery cell; 101-Drain port; 102-Liquid inlet; 103-Exhaust port; 104-Air inlet; 200-Liquid container; 300-First drive pump; 400-Second drive pump; 500-Gas container; 600-Pipeline assembly; 601-Main drain pipe; 602-Drain branch pipe; 603-Drain branch pipe; 604-Main inlet pipe; 605-Inlet branch pipe; 606-Inlet branch pipe; 607-Main exhaust pipe; 608-Exhaust branch pipe; 609-Exhaust branch pipe; 610-Inlet... Main air pipe; 611-Inlet branch pipe; 612-Inlet branch pipe; 700-Multi-way valve assembly; 701-First multi-way valve; 702-Second multi-way valve; 703-Third multi-way valve; 704-Fourth multi-way valve; 800-Flow meter assembly; 801-First flow meter; 802-Second flow meter; 803-Third flow meter; 804-Fourth flow meter; 900-Control valve assembly; 901-First control valve; 902-Second control valve; 903-Third control valve; 904-Fourth control valve.

[0033] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0038] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0039] In related technologies, fluid passages are added to the top cover of a single battery cell to enable the draining and replenishment of electrolyte, thereby restoring the capacity of the single battery cell. However, the liquid transport passage of the single battery cell is located on its top cover plate, and after long-term cycling, the electrolyte is deposited at the bottom of the single battery cell under the action of gravity. Therefore, it is difficult to drain the electrolyte and it is not convenient to drain and replenish the battery at the same time.

[0040] In view of this, the present application provides an energy storage system that provides a drain port and a liquid inlet on both sides of the battery in the first horizontal direction, thereby facilitating the first drive pump to drive the electrolyte deposited at the bottom of the cell to drain out, and facilitating the replenishment of fresh electrolyte or regeneration reagent to the cell through the liquid inlet while draining out the old electrolyte through the drain port, thereby improving the efficiency of draining and replenishing.

[0041] The specific implementation of the energy storage system provided in this embodiment will be described in detail below with reference to the accompanying drawings.

[0042] Reference Figures 1 to 4 As shown, the energy storage system provided in this embodiment includes a plurality of battery cells 100, a liquid container 200, and a first drive pump 300. Each battery cell 100 has a drain port 101 and a liquid inlet 102, which are located on opposite sides of the battery cell 100 along a first horizontal direction. At least two battery cells 100 are arranged in the same layer along a second horizontal direction, and at least two battery cells 100 are arranged in layers along a vertical direction. The first horizontal direction can be referred to as the X direction in the accompanying drawings, the second horizontal direction as the Y direction, and the vertical direction as the Z direction.

[0043] The liquid container 200 is connected to the inlet 102 and is configured to provide the battery cell 100 with electrolyte and regeneration reagents, etc. The first drive pump 300 is connected to the outlet 101 and is configured to drive the regeneration liquid in the liquid container 200 into the battery cell 100, or drive the electrolyte in the battery cell 100 to be discharged from the battery cell 100.

[0044] In the energy storage system provided in this embodiment, the battery cell 100 is used to store and release electrical energy. Multiple battery cells 100 can be arranged along the second horizontal direction to form a layer of battery cells 100. In the vertical direction, multiple battery cells 100 can be stacked sequentially to form a multilayer battery cell 100. In this way, the storage system can have multiple battery cells 100 arranged in sequence, so that the integration of multiple battery cells 100 can provide a larger voltage and current.

[0045] Because the capacity of the battery cell 100 will decrease after long-term use, it can be replenished with fresh electrolyte and regeneration reagent to replenish lithium ions and electrons. Therefore, the battery cell 100 can be provided with a drain port 101 and a liquid inlet 102 on both sides. After the old electrolyte is drained through the drain port 101, fresh electrolyte and regeneration reagent can be injected into the battery cell 100 immediately through the liquid inlet 102 to restore the capacity of the battery cell 100 and improve the cycle life of the battery cell 100. Both can be done simultaneously, one in and one out, which improves the efficiency of draining and replenishing.

[0046] Since the drain port 101 and the inlet port 102 are located on both sides of the cell 100 in the first horizontal direction, when the first drive pump 300 is used to extract the old electrolyte deposited at the bottom of the cell 100, the electrolyte flows in the horizontal direction without having to overcome gravity to flow upward. Therefore, it is beneficial for the first drive pump 300 to drive the old electrolyte to be discharged quickly, thereby improving the electrolyte drainage efficiency.

[0047] The regeneration reagent may include, but is not limited to, lithium-naphthyl organic solvents with strong reducing properties such as lithium naphthylene and lithium biphenylene, and the electrolyte may be any electrolyte in the relevant technology. This embodiment does not limit this.

[0048] The energy storage system of this embodiment includes a battery cell 100, a liquid container 200, and a first drive pump 300. The battery cell 100 includes a drain port 101 and a liquid inlet 102. The drain port 101 is used to discharge the old electrolyte in the battery cell 100, and the liquid inlet 102 is used to replenish the battery cell 100 with electrolyte, regeneration reagents, and other regeneration liquids. The liquid container 200 is used to supply electrolyte, regeneration reagents, and other regeneration liquids to the battery cell 100. The first drive pump 300 is used to drive the electrolyte, regeneration reagents, and other regeneration liquids into the battery cell 100, or to drive the battery cell 100. The old electrolyte inside the cell 100 is discharged by setting the drain port 101 and the inlet port 102 on both sides of the cell 100 in the first horizontal direction. This allows the drain port 101 on one side of the cell 100 in the first horizontal direction to discharge the old electrolyte, and then the inlet port 102 on the other side of the cell 100 in the first horizontal direction to inject fresh electrolyte. The two work together to improve the efficiency of draining and replenishing electrolyte. Moreover, during draining, the old electrolyte inside the cell 100 can flow horizontally without having to overcome gravity to flow upward, which further improves the efficiency of draining.

[0049] Reference Figure 1 and Figure 4As shown, in one possible implementation, the energy storage system further includes a second drive pump 400, the cell 100 having an exhaust port 103, the second drive pump 400 being connected to the exhaust port 103 and configured to drive flammable gas within the cell 100 to exit the cell 100.

[0050] It is understandable that when the battery cell 100 experiences thermal runaway, high-temperature, flammable gases will be generated inside the battery cell 100, leading to safety issues such as fire and explosion. Therefore, in this embodiment, the battery cell 100 can also be provided with an exhaust port 103, which can then be used by the second drive pump 400 to extract the flammable gases inside the battery cell 100, thereby improving the safety of the energy storage system.

[0051] Reference Figure 1 and Figure 4 As shown, in some embodiments, the energy storage system further includes a gas container 500, and the battery cell 100 also has an air inlet 104. The gas container 500 is connected to the air inlet 104 and is configured to provide flame-retardant gas to the battery cell 100. The second drive pump 400 is also configured to drive the flame-retardant gas in the gas container 500 into the battery cell 100.

[0052] Thus, when a single cell 100 or multiple cells 100 experience thermal runaway, the gas container 500 can provide flame-retardant gas to the cell 100 that has experienced thermal runaway, and the flame-retardant gas is driven by the second drive pump 400 to enter the cell 100 through the air inlet 104, thereby avoiding safety problems such as fire and explosion caused by thermal runaway of the cell 100.

[0053] Among them, flame-retardant gases may include inert gases such as nitrogen and argon.

[0054] In some implementations, the air inlet 104 and the exhaust outlet 103 are located on both sides of the cell 100 along the first horizontal direction.

[0055] With this configuration, the flow direction of gas and the flow direction of liquid in the cell 100 are both along the first horizontal direction, which can prevent fluid eddies from forming inside the cell 100, thereby avoiding adverse effects on the flatness of the electrode sheets inside the cell 100.

[0056] For example, the air inlet 104 and the liquid inlet 102 are located on one side of the battery cell 100 along the first horizontal direction, and the exhaust port 103 and the liquid outlet 101 are located on one side of the battery cell 100 along the first horizontal direction. Alternatively, the air inlet 104 and the liquid outlet 101 are located on one side of the battery cell 100 along the first horizontal direction, and the exhaust port 103 and the liquid inlet 102 are located on one side of the battery cell 100 along the first horizontal direction.

[0057] In one possible implementation, the air inlet 104 and the liquid inlet 102 are located on one side of the cell 100 along the first horizontal direction, and the exhaust port 103 and the liquid outlet 101 are located on the other side of the cell 100 along the first horizontal direction.

[0058] It is understood that in this embodiment, the flow direction of the gas and the flow direction of the liquid are both along the first horizontal direction and the flow directions of the two are consistent. In this way, when the gas intake, exhaust, liquid intake and liquid discharge are carried out at the same time, the collision between the gas and the liquid can be effectively avoided, thereby avoiding the formation of fluid eddies inside the cell 100 and thus avoiding adverse effects on the flatness of the electrode sheets inside the cell 100.

[0059] In one possible implementation, the liquid inlet 102 is located on the upper side of the cell 100, and the liquid outlet 101 is located on the lower side of the cell 100.

[0060] In this way, fresh electrolyte can enter the cell 100 from the top and flow from top to bottom under the action of gravity, thereby improving the wetting effect of the electrolyte on the electrode, while old electrolyte can be discharged from the bottom of the cell 100, thereby improving the drainage efficiency.

[0061] In some embodiments, in the vertical direction, the liquid inlet 102 and the liquid outlet 101 are located on the lower side of the cell 100, and the air inlet 104 and the air outlet 103 are located on the upper side of the cell 100.

[0062] In other words, the liquid flows on the lower side of the cell 100, and the gas flows on the upper side of the cell 100. This avoids the liquid or gas flow affecting the flatness of the electrode. The flame-retardant gas has a low density and is suitable for flowing on the upper side of the cell 100. The old electrolyte is deposited at the bottom of the cell 100. The drain port 101 is located on the lower side, which is conducive to the rapid discharge of electrolyte.

[0063] Reference Figures 1 to 4As shown, in some embodiments, the energy storage system further includes a piping assembly 600, which includes a main drain pipe 601, several branch drain pipes 602, and several branch drain pipes 603. Each branch drain pipe 603 corresponds to a drain outlet 101. Each layer of battery cells 100 is provided with one branch drain pipe 602. Each battery cell 100 located on the same layer is connected to the same branch drain pipe 602 through its corresponding branch drain pipe 603. Each branch drain pipe 602 is connected to the main drain pipe 601, which is connected to the first drive pump 300. The first drive pump 300 can be a variable frequency pump. Therefore, when it is necessary to drain the old electrolyte during capacity repair of the battery cell 100, or when the battery cell 100 experiences thermal runaway and needs to drain the electrolyte to prevent the battery cell 100 from catching fire, the first drive pump 300 can provide power to make the electrolyte in each battery cell 100 flow sequentially along the corresponding drain branch pipe 603 to the corresponding drain branch pipe 602 of each layer, and the drain branch pipes 602 of each layer then flow to the drain main pipe 601, thereby draining the energy storage system.

[0064] Reference Figure 1 and Figure 4 As shown, in some embodiments, the pipeline assembly 600 includes a main inlet pipe 604, a plurality of branch inlet pipes 605 and a plurality of branch inlet pipes 606. The branch inlet pipes 606 are configured one-to-one with the inlet ports 102. Each layer of battery cell 100 is provided with one branch inlet pipe 605. Each battery cell 100 located on the same layer is connected to the same branch inlet pipe 605 through the corresponding branch inlet pipe 606. Each branch inlet pipe 605 is connected to the main inlet pipe 604. The main inlet pipe 604 is connected to the liquid container 200.

[0065] Therefore, when fresh electrolyte and regeneration reagent need to be injected during capacity repair of cell 100, the first drive pump 300 can provide power so that the regeneration liquid in liquid container 200 is first diverted along the main inlet pipe 604 to the inlet branch pipe 605 of each layer, and then diverted through the inlet branch pipe 605 of each layer to the corresponding inlet branch pipe 606, and finally flows along the inlet branch pipe 606 to the corresponding cell 100.

[0066] Reference Figure 1 and Figure 4 As shown, in some embodiments, the piping assembly 600 further includes an exhaust manifold 607, a plurality of exhaust branch pipes 608, and a plurality of exhaust support pipes 609. Each exhaust support pipe 609 corresponds one-to-one with an exhaust port 103. Each layer of battery cell 100 is provided with one exhaust branch pipe 608. Each battery cell 100 located on the same layer is connected to the same exhaust branch pipe 608 through a corresponding exhaust support pipe 609. Each exhaust branch pipe 608 is connected to the exhaust manifold 607, which is connected to the second drive pump 400. The second drive pump 400 can be a vacuum pump.

[0067] Thus, when thermal runaway occurs in the battery cell 100 and flammable gas needs to be discharged to prevent the battery cell 100 from catching fire, the second drive pump 400 can provide power, causing the flammable gas in each battery cell 100 to flow sequentially along the corresponding exhaust branch pipe 609 to the corresponding exhaust branch pipe 608 of each layer. The exhaust branch pipes 608 of each layer then flow to the exhaust main pipe 607, thereby discharging the flammable gas from the energy storage system and improving the safety of the energy storage system.

[0068] Reference Figure 1 and Figure 4 As shown, in some embodiments, the pipeline assembly 600 further includes an air intake main pipe 610, a plurality of air intake branch pipes 611 and a plurality of air intake sub-pipes 612. The air intake sub-pipes 612 are configured one-to-one with the air inlets 104. Each layer of battery cell 100 is provided with an air intake branch pipe 611. Each battery cell 100 located on the same layer is connected to the same air intake branch pipe 611 through the corresponding air intake sub-pipe 612. Each air intake branch pipe 611 is connected to the air intake main pipe 610. The air intake main pipe 610 is connected to the gas container 500.

[0069] Thus, in the event of thermal runaway in the battery cell 100, flame-retardant gas can be injected into the battery cell 100 through the main intake pipe 610, the intake branch pipe 611, and the intake branch pipe 612 to prevent the battery cell 100 from catching fire. Specifically, the second drive pump 400 can provide power to the gas container 500, thereby causing the flame-retardant gas in the gas container 500 to first flow along the main intake pipe 610 to the intake branch pipe 611 of each layer, and then through the intake branch pipe 611 of each layer to the corresponding intake branch pipe 612, and finally flow along the intake branch pipe 612 to the corresponding battery cell 100, thereby improving the safety of the energy storage system.

[0070] It is understood that when the battery cell 100 experiences thermal runaway, it is possible to perform only venting treatment on the battery cell 100, or to perform both venting and charging treatment on the battery cell 100, or to perform both venting and draining treatment on the battery cell 100. This embodiment does not limit this to any particular method.

[0071] Reference Figure 2 and Figure 4As shown, in one possible implementation, the energy storage system further includes a multi-way valve assembly 700, which includes at least one of a first multi-way valve 701, a second multi-way valve 702, a third multi-way valve 703, and a fourth multi-way valve 704. Each drain branch pipe 603 is connected to the corresponding drain branch pipe 602 through the first multi-way valve 701, each inlet branch pipe 606 is connected to the corresponding inlet branch pipe 605 through the second multi-way valve 702, each exhaust branch pipe 609 is connected to the corresponding exhaust branch pipe 608 through the third multi-way valve 703, and each air intake branch pipe 612 is connected to the corresponding air intake branch pipe 611 through the fourth multi-way valve 704.

[0072] Among them, the first multi-way valve 701, the second multi-way valve 702, the third multi-way valve 703 and the fourth multi-way valve 704 can all be three-way valves. The three-way valve has three connection ports, including two outlets and one inlet.

[0073] Thus, the first multi-way valve 701 can collect the liquid from each drain branch pipe 603 to the corresponding drain branch pipe 602, the second multi-way valve 702 can divert the liquid from the inlet branch pipe 605 to the corresponding inlet branch pipes 606, the third multi-way valve 703 can collect the gas from each exhaust branch pipe 609 to the corresponding exhaust branch pipe 608, and the second multi-way valve 702 can divert the gas from the intake branch pipe 611 to the corresponding intake branch pipes 612.

[0074] In one possible implementation, the energy storage system also includes a battery management component, wherein the first multi-way valve 701, the second multi-way valve 702, the third multi-way valve 703, and the fourth multi-way valve 704 are all electrically connected to the battery management component.

[0075] In this way, the battery management component can monitor the temperature, voltage, etc. of the cell 100, and thus monitor the status of the cell 100 to ensure the normal operation of the cell 100. The battery management component can also control the on / off status of the first multi-way valve 701, the second multi-way valve 702, the third multi-way valve 703, and the fourth multi-way valve 704, thereby improving the automation level of the energy storage system.

[0076] For example, when cell 100 only needs to drain electrolyte, the battery management component can control the first multi-way valve 701 to open and the second multi-way valve 702, the third multi-way valve 703, and the fourth multi-way valve 704 to close. Alternatively, when cell 100 only needs to replenish electrolyte, the battery management component can control the second multi-way valve 702 to open and the first multi-way valve 701, the third multi-way valve 703, and the fourth multi-way valve 704 to close. In this way, the battery management component can control the on / off state of the first multi-way valve 701, the second multi-way valve 702, the third multi-way valve 703, and the fourth multi-way valve 704 according to different situations.

[0077] Reference Figure 1 As shown, in one possible implementation, the energy storage system further includes a flow meter assembly 800, which includes at least one of a first flow meter 801, a second flow meter 802, a third flow meter 803, and a fourth flow meter 804. The first flow meter 801 is disposed at one end of the drain manifold 601 toward the first drive pump 300, the second flow meter 802 is disposed at one end of the inlet manifold 604 toward the liquid container 200, the third flow meter 803 is disposed at one end of the exhaust manifold 607 toward the second drive pump 400, and the fourth flow meter 804 is disposed at one end of the inlet manifold 610 toward the gas container 500.

[0078] In this way, the first flow meter 801 can measure the amount of liquid discharged from the battery cell 100, the second flow meter 802 can measure the amount of liquid injected into the battery cell 100, the third flow meter 803 can measure the amount of gas discharged from the battery cell 100, and the fourth flow meter 804 can measure the amount of gas injected into the battery cell 100.

[0079] Reference Figure 4 As shown, in one possible implementation, the energy storage system further includes a control valve assembly 900, which includes at least one of a first control valve 901, a second control valve 902, a third control valve 903, and a fourth control valve 904. The first control valve 901 is located at one end of the drain manifold 601 facing the first drive pump 300, the second control valve 902 is located at one end of the inlet manifold 604 facing the liquid container 200, the third control valve 903 is located at one end of the exhaust manifold 607 facing the second drive pump 400, and the fourth control valve 904 is located at one end of the inlet manifold 610 facing the gas container 500.

[0080] With this configuration, the first control valve 901 can control the on / off state between the drain manifold 601 and the first drive pump 300, the second control valve 902 can control the on / off state between the liquid container 200 and the inlet manifold 604, the third control valve 903 can control the on / off state between the exhaust manifold 607 and the second drive pump 400, and the fourth control valve 904 can control the on / off state between the gas container 500 and the air inlet manifold 610. This allows for the opening or closing of the first control valve 901, the second control valve 902, the third control valve 903, and the fourth control valve 904 as needed.

[0081] For example, when the battery management component detects a fault in an individual cell 100, it opens the second drive pump 400, the third control valve 903, and the third multi-way valve 703 corresponding to that cell 100 to vent the gas from the cell 100. After venting, it closes the third control valve 903 and the third multi-way valve 703 corresponding to that cell 100, and then opens the fourth control valve 904 and the fourth multi-way valve 704 corresponding to that cell 100 to fill the cell 100 with flame-retardant gas. The flame-retardant gas can prevent thermal runaway of the cell 100 and maintain the pressure balance inside and outside the cell 100. At the same time, the third flow meter 803 can measure the amount of gas vented from the cell 100, and the fourth flow meter 804 can measure the amount of gas filled into the cell 100.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An energy storage system, characterized by, The application relates to a battery cell liquid and gas driving device. The application comprises: a plurality of battery cells (100), the battery cells (100) having a liquid outlet (101) and a liquid inlet (102), the liquid inlet (102) and the liquid outlet (101) being located on two sides of the battery cell (100) along a first horizontal direction; a liquid container (200) in communication with the liquid inlet (102) and configured to provide a regeneration liquid to the battery cell (100); 2. The energy storage system of claim 1, wherein, a first driving pump (300) in communication with the liquid outlet (101) and configured to drive the regeneration liquid in the liquid container (200) into the battery cell (100) or drive the electrolyte in the battery cell (100) out of the battery cell (100).

3. The energy storage system of claim 2, wherein, The application further comprises a second driving pump (400), the battery cell (100) having a gas outlet (103), the second driving pump (400) being in communication with the gas outlet (103) and configured to drive the flammable gas in the battery cell (100) out of the battery cell (100).

4. The energy storage system of claim 3, wherein, The application further comprises a gas container (500), the battery cell (100) further having a gas inlet (104), the gas container (500) being in communication with the gas inlet (104) and configured to provide a fire-retardant gas to the battery cell (100), and the second driving pump (400) being further configured to drive the fire-retardant gas in the gas container (500) into the battery cell (100).

5. An energy storage system according to claim 3 or 4, wherein, The gas inlet (104) and the gas outlet (103) are located on two sides of the battery cell (100) along the first horizontal direction.

6. The energy storage system of any one of claims 1-4, wherein, The gas inlet (104) and the liquid inlet (102) are located on one side of the battery cell (100) along the first horizontal direction, and the gas outlet (103) and the liquid outlet (101) are located on the other side of the battery cell (100) along the first horizontal direction.

7. The energy storage system of claim 5, wherein, The liquid inlet (102) is located on the upper side of the battery cell (100), and the liquid outlet (101) is located on the lower side of the battery cell (100).

8. The energy storage system of claim 3 or 4, wherein, The liquid inlet (102) and the liquid outlet (101) are located on the lower side of the battery cell (100), and the gas inlet (104) and the gas outlet (103) are located on the upper side of the battery cell (100). At least two battery cells (100) are arranged in the same layer along a second horizontal direction and arranged in different layers along a vertical direction. The application further comprises a pipeline assembly (600) comprising a liquid outlet main pipe (601), a plurality of liquid outlet branch pipes (602) and a plurality of liquid outlet sub-pipes (603), the liquid outlet sub-pipes (603) being arranged one by one in correspondence with the liquid outlets (101), one liquid outlet branch pipe (602) being arranged in each layer of the battery cells (100), each battery cell (100) in the same layer being connected to the same liquid outlet branch pipe (602) through a corresponding liquid outlet sub-pipe (603), each liquid outlet branch pipe (602) being connected to the liquid outlet main pipe (601), and the liquid outlet main pipe (601) being connected to the first driving pump (300). And / or, the pipeline assembly (600) comprises a liquid inlet main pipe (604), a plurality of liquid inlet sub-pipes (605) and a plurality of liquid inlet branch pipes (606), the liquid inlet branch pipes (606) are arranged one by one corresponding to the liquid inlets (102), one liquid inlet sub-pipe (605) is arranged for each layer of the battery cells (100), each battery cell (100) in the same layer is connected to the same liquid inlet sub-pipe (605) through a corresponding liquid inlet branch pipe (606), each liquid inlet sub-pipe (605) is connected to the liquid inlet main pipe (604), and the liquid inlet main pipe (604) is connected to the liquid container (200).

9. The energy storage system of claim 8, wherein, The pipeline assembly (600) further comprises an exhaust main pipe (607), a plurality of exhaust sub-pipes (608) and a plurality of exhaust branch pipes (609), the exhaust branch pipes (609) are arranged one by one corresponding to the exhaust outlets (103), one exhaust sub-pipe (608) is arranged for each layer of the battery cells (100), each battery cell (100) in the same layer is connected to the same exhaust sub-pipe (608) through a corresponding exhaust branch pipe (609), each exhaust sub-pipe (608) is connected to the exhaust main pipe (607), and the exhaust main pipe (607) is connected to the second driving pump (400). And / or, the pipeline assembly (600) further comprises an air inlet main pipe (610), a plurality of air inlet sub-pipes (611) and a plurality of air inlet branch pipes (612), the air inlet branch pipes (612) are arranged one by one corresponding to the air inlets (104), one air inlet sub-pipe (611) is arranged for each layer of the battery cells (100), each battery cell (100) in the same layer is connected to the same air inlet sub-pipe (611) through a corresponding air inlet branch pipe (612), each air inlet sub-pipe (611) is connected to the air inlet main pipe (610), and the air inlet main pipe (610) is connected to the gas container (500).

10. The energy storage system of claim 9, wherein, Further comprising a multi-way valve assembly (700), the multi-way valve assembly (700) comprises at least one of a first multi-way valve (701), a second multi-way valve (702), a third multi-way valve (703) and a fourth multi-way valve (704); Each liquid outlet branch pipe (603) is connected to a corresponding liquid outlet sub-pipe (602) through the first multi-way valve (701), each liquid inlet branch pipe (606) is connected to a corresponding liquid inlet sub-pipe (605) through the second multi-way valve (702), each exhaust branch pipe is connected to a corresponding exhaust sub-pipe through the third multi-way valve (703), and each air inlet branch pipe (612) is connected to a corresponding air inlet sub-pipe (611) through the fourth multi-way valve (704).

11. The energy storage system of claim 10, wherein, Further comprising a battery management assembly, the first multi-way valve (701), the second multi-way valve (702), the third multi-way valve (703) and the fourth multi-way valve (704) are electrically connected to the battery management assembly.

12. The energy storage system of claim 9, wherein, Further comprising a flow meter assembly (800) including at least one of a first flow meter (801), a second flow meter (802), a third flow meter (803), and a fourth flow meter (804); The first flow meter (801) is disposed at an end of the liquid discharge main pipe (601) toward the first drive pump (300), the second flow meter (802) is disposed at an end of the liquid inlet main pipe (604) toward the liquid container (200), the third flow meter (803) is disposed at an end of the gas discharge main pipe toward the second drive pump (400), and the fourth flow meter (804) is disposed at an end of the gas inlet main pipe (610) toward the gas container (500).

13. The energy storage system of claim 9, wherein, Further comprising a control valve assembly (900) including at least one of a first control valve (901), a second control valve (902), a third control valve (903), and a fourth control valve (904); The first control valve (901) is disposed at an end of the liquid discharge main pipe (601) toward the first drive pump (300), the second control valve (902) is disposed at an end of the liquid inlet main pipe (604) toward the liquid container (200), the third control valve (903) is disposed at an end of the gas discharge main pipe toward the second drive pump (400), and the fourth control valve (904) is disposed at an end of the gas inlet main pipe (610) toward the gas container (500).

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