CN113937384A - Energy storage battery system - Google Patents
Energy storage battery system Download PDFInfo
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- CN113937384A CN113937384A CN202010671606.3A CN202010671606A CN113937384A CN 113937384 A CN113937384 A CN 113937384A CN 202010671606 A CN202010671606 A CN 202010671606A CN 113937384 A CN113937384 A CN 113937384A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides an energy storage battery system. The energy storage battery system is provided with the safety agent storage tank, and the safety agent in the safety agent storage tank can be simultaneously used for heating the energy storage battery system and injecting the safety agent into a fault battery, so that the safety agent in the safety agent storage tank can be fully utilized even if the battery does not have a fault, and the structure of the whole system is simplified. In the energy storage battery system, for each battery monomer, a heating pipeline can be used for heating the side with lower temperature of the battery monomer; for the plurality of battery cells as a whole, the batteries spaced from each other may be heated by a heating pipe or a space in the container may be heated. According to the energy storage battery system disclosed by the invention, the stable operation of the energy storage battery system at the required temperature can be ensured in a flexible mode, and the long-term idling of a safety agent can be effectively avoided, so that the stability and the safety of the high-temperature energy storage battery system are ensured simultaneously by a simple system structure.
Description
Technical Field
The invention relates to the field of batteries, in particular to an energy storage battery system.
Background
The energy storage battery has the advantages of large specific energy, high output voltage, long cycle life, small environmental pollution and the like, and is a common energy storage element in the field of energy storage. Considering that the electrolyte performance and the temperature of the energy storage battery are positively correlated in a certain range, the battery performance can be ensured to a certain extent by controlling the operating temperature of the energy storage battery. Especially under the conditions of night, winter, cold areas and the like, the normal and efficient operation of the whole energy storage battery system is ensured by increasing the working temperature of the energy storage battery. In the existing energy storage battery system, the temperature of the energy storage battery is generally raised by heating with a heating plate or an air conditioner, but the heating plate needs to consume electric energy, the temperature control mode lacks flexibility, the heat transfer efficiency of the air conditioner heating mode is low, and the temperature uniformity is difficult to control. In addition, for an energy storage battery system which needs to operate in a high-temperature working environment, how to improve the safety of the system is also a problem which needs to be solved at present.
Disclosure of Invention
In view of the above problems, the present invention provides an energy storage battery system, which is particularly suitable for a high temperature energy storage battery system. The energy storage battery system is provided with the safety agent storage tank, and the safety agent in the safety agent storage tank can be simultaneously used for heating the energy storage battery system and injecting the safety agent into a fault battery, so that the safety agent in the safety agent storage tank can be fully utilized even if the battery does not have a fault, and the structure of the whole system is simplified. In the energy storage battery system, for each single battery, each surface of the single battery does not need to be heated, and the side with lower temperature of the single battery can be heated by using a heating pipeline; for the plurality of battery cells as a whole, each of the plurality of battery cells does not need to be heated, but the batteries spaced from each other may be heated by a heating pipeline or a space in the container may be heated. Through targeted arrangement and flexible control of the heating pipelines, the overall high-temperature requirement of the high-temperature energy storage battery system and the temperature balance requirement among the battery monomers can be met. According to the energy storage battery system disclosed by the invention, the stable operation of the energy storage battery system at the required temperature can be ensured in a flexible mode, and the long-term idling of a safety agent can be effectively avoided, so that the stability and the safety of the high-temperature energy storage battery system are ensured simultaneously by a simple system structure.
The technical scheme provided by the invention is as follows:
according to the present invention, there is provided an energy storage battery system comprising: the battery comprises a plurality of battery monomers, wherein an injection port and a discharge port are arranged on a battery monomer shell of each battery monomer; a safener storage tank in which a safener is contained; a recovery tank for recovering a fluid discharged from the battery cell; a safety pipeline system in which a safety agent injection pipeline and a discharge pipeline are provided for each battery cell, a safety agent can enter the battery cell via the safety agent injection pipeline and the injection port and a fluid in the battery cell can be discharged into the recovery tank via the discharge port and the discharge pipeline, and a valve is provided on each safety agent injection pipeline; the temperature control pipeline system comprises a temperature control pipeline and a heating device, a safety agent in a safety agent storage tank enters the temperature control pipeline, the safety agent flowing through the temperature control pipeline is heated by the heating device, the temperature control pipeline is close to at least one of battery monomer shells of a plurality of battery monomers, the safety agent after heat exchange returns to the safety agent storage tank, the safety agent in the safety agent storage tank circularly flows in the temperature control pipeline system, and when a certain battery monomer breaks down, a valve on the safety agent injection pipeline is opened, so that the safety agent enters the battery monomer with the fault through the safety agent injection pipeline of the battery monomer with the fault and an injection port. In the energy storage battery system according to the invention, when the battery cell is not in failure, the safety agent in the safety agent storage tank is not in an idle state, but is circulated as a heating fluid for raising the temperature of the whole energy storage battery system. Because the safety agent as the heating fluid circularly flows in the temperature control pipeline, the temperature control pipeline can be flexibly arranged according to the temperature regulation requirement of the whole system. Specifically, it is not necessary to provide a corresponding temperature control pipeline portion for each battery cell, and it is not necessary to heat the battery cell located at the center of the battery system and having a high temperature, and it is possible to provide a corresponding temperature control pipeline portion for the battery cell located at the outer side. Moreover, the temperature control pipeline does not need to surround the whole shell of the battery cell, but is close to or clings to one side of the battery cell needing to be heated. Compared with the traditional battery monomer heated by the electrode plate, the battery monomer is heated by the safety agent in the fluid state, so that various energy sources such as solar energy, wind energy, geothermal energy and the like can be favorably utilized, and the waste of electric energy can be avoided. In addition, a heating fluid system can be avoided being arranged independently, the integral structure of the system is simplified, and the cost is greatly saved. When a certain battery monomer breaks down, the safety agent can be injected into the battery monomer with the fault only by opening the valve on the safety agent injection pipeline corresponding to the battery monomer with the fault, and the safety agent continuously circulates in the whole system, so that the safety agent can be more favorably and quickly injected into the battery monomer through the safety agent injection pipeline.
In the energy storage battery system, the arrangement of the temperature control pipeline and the control of the temperature and the flow of the safety agent in the temperature control pipeline are of great importance to the temperature of the whole system and the balance of temperature distribution. In the energy storage battery system, a heating part can be arranged for part of the battery cells, and the running temperature of the high-temperature battery system is ensured together with the heat emitted by the battery cells during the working process. According to the invention, two battery monomers respectively adjacent to the temperature control pipeline can be mutually spaced by n battery monomers which are not adjacent to the temperature control pipeline, wherein n is more than or equal to 1. Adjacent here means close or abutting, that is, the temperature control line may be adjacent to the battery cell at a distance, or the temperature control line may abut the battery cell. Specifically, a section of temperature control pipeline is not required to be arranged for each single battery, and a corresponding section of temperature control pipeline can be arranged for the single battery in a low-temperature area in the operation process of the battery system according to the specific arrangement condition of the single battery in the space, that is, a part of the temperature control pipeline passes through the single battery in the low-temperature space, so that the temperature of the whole energy storage battery system reaches a preset high temperature and the whole temperature is balanced. The temperature control pipeline can adopt a rigid pipe or a flexible pipe. Under the condition of adopting the flexible pipe, the layout of the flexible pipe can be flexibly adjusted according to the change of requirements.
The energy storage battery system can further comprise an outer shell for accommodating the plurality of battery monomers, and the temperature control pipeline can be arranged on the inner wall of the outer shell so as to heat the plurality of battery monomers accommodated in the outer shell. The temperature control pipeline can be arranged on one or more of the peripheral side wall, the top and the bottom of the outer shell, so that peripheral battery cells of the stacked battery stack can be better heated. Through laying of the temperature control pipeline, heating of the battery monomer and heating of the inner wall of the outer shell can be combined. The outer case here may be, for example, a container case or a battery cabinet case.
In the energy storage battery system, the safety pipeline system may be a subsystem of the temperature control pipeline system, or the safety pipeline system and the temperature control pipeline system may be relatively independent systems. When the safety pipeline system is used as a subsystem of the temperature control pipeline system, the safety agent injection pipeline can be connected to the temperature control pipeline, and when a valve on the safety agent injection pipeline is opened, the safety agent circulating in the temperature control pipeline can directly enter the battery monomer shell through the safety agent injection pipeline. The safety agent injection pipeline can be used as a branch on the temperature control pipeline, so that the circulating safety agent can rapidly enter the single battery with faults, the reaction of the system is quicker, and the structure of the whole energy storage battery system can be simplified. Under the condition that the safety pipeline system and the temperature control pipeline system are relatively independent, the safety pipeline system and the temperature control pipeline system can share the safety agent storage tank, and the safety agent injection pipeline of the safety pipeline system and the temperature control pipeline of the temperature control pipeline system are respectively communicated with the safety agent storage tank. In a temperature-controlled pipeline system, a safener is circulated in the temperature-controlled pipeline and is heated by a heating device in the temperature-controlled pipeline system. In the safety pipeline system, the safety agent can be injected into the safety agent injection pipeline in advance and is in a static state, and when a certain battery monomer has a fault, a valve on the corresponding safety agent injection pipeline is opened, so that the safety agent is injected into the battery monomer with the fault in time. In addition, a cooling device can be arranged in the safety pipeline system and used for cooling the safety agent injected into the single battery shell to 0-25 ℃, so that the battery unit with faults can be rapidly cooled and thermal runaway of the battery unit can be prevented. Therefore, under the condition, the temperature of the safety pipeline system and the temperature control pipeline system can be flexibly controlled respectively, and the purposes of keeping the high-temperature operation of the battery system and cooling and resisting the flame of the failed battery monomer can be achieved simultaneously.
The energy storage battery system according to the invention is preferably a high-temperature battery system, but it should be noted that the purpose of cooling the energy storage battery system can be achieved by replacing the heating device in the temperature-controlled pipe system with a cooling device, or by additionally providing a cooling device in the temperature-controlled pipe system. In the present invention, preferably, the heating device heats the safener in the temperature control pipeline to 60-90 ℃. The heating device may be an electric heating device, or a solar heating device, a wind heating device, or the like may be used according to the actual use situation. In order to adjust the working temperature of the battery to the required temperature, a temperature sensor can be arranged in the battery monomer shell or on the surface of the battery monomer shell, and the temperature of the safety agent in the temperature control pipeline is adjusted according to the measured temperature of the temperature sensor; or, a temperature sensor is arranged in the battery monomer shell or on the surface of the battery monomer shell, a flow valve is arranged on the temperature control pipeline, and the flow or the flow speed of the safety agent passing through the flow valve is adjusted according to the measured temperature of the temperature sensor. Therefore, the temperature of the energy storage battery system can be adjusted to a required temperature by adjusting the temperature, flow rate or flow velocity of the safety agent in the temperature control pipeline. In order to make the temperature distribution of the whole energy storage battery system uniform, a plurality of battery monomers can be divided into different groups, the temperature control pipeline is divided into a plurality of branches, a corresponding control valve is arranged on each branch, and the temperature, the flow or the flow speed of the safety agent on each branch are adjusted according to the measured temperature of the battery monomers of different groups, so that the temperature of the battery monomers of different groups is the same or similar. For example, a plurality of battery cells on the periphery of the battery stack are divided into a group, a plurality of battery cells in the middle of the battery stack are divided into a group, each group of battery cells are respectively provided with a temperature sensor and a temperature control pipeline branch, and the temperature, the flow or the flow speed of a safety agent on the corresponding temperature control pipeline branch is controlled according to the detected temperature of each group of battery cells, so that the temperature of each group of battery cells cannot generate large difference, and the temperature of the whole battery system reaches an equilibrium state.
In the energy storage battery system, the safener storage tank may further include a high-temperature safener storage tank and a low-temperature safener storage tank, and the temperature of the safener in the high-temperature safener storage tank is higher than that of the safener in the low-temperature safener storage tank, for example, the temperature of the safener in the high-temperature safener storage tank may be 75 to 150 ℃, the temperature of the safener in the low-temperature safener storage tank may be 0 to 75 ℃, a pipeline may be disposed between the high-temperature safener storage tank and the low-temperature safener storage tank, and a valve may be in a closed state and opened when the safeners in the high-temperature safener storage tank and the low-temperature safener storage tank need to circulate. The safener in the high-temperature safener storage tank can return to the low-temperature safener storage tank after flowing through the temperature control pipeline system, and the safener in the low-temperature safener storage tank can return to the high-temperature safener storage tank after flowing through the temperature control pipeline system. The safener in the high temperature safener storage tank can be heated to a desired higher temperature in the high temperature safener storage tank, and likewise, the safener in the low temperature safener storage tank can be cooled to a desired lower temperature in the low temperature safener storage tank. In addition, the high-temperature safety agent storage tank can be connected to the temperature control pipeline through the heating device, the energy storage battery system can also be provided with a cooling device, and the low-temperature safety agent storage tank can be connected to the temperature control pipeline through the cooling device. That is, when a high-temperature safener is needed, the safener with a higher temperature in the high-temperature storage tank can be utilized to further heat the high-temperature safener with less energy, and the safener which flows through the temperature control pipeline and reduces the temperature flows into the low-temperature safener storage tank; when the low-temperature safety agent is needed, the safety agent with lower temperature in the low-temperature storage tank can be utilized to be further cooled by less energy, and the safety agent which flows through the temperature control pipeline and raises the temperature flows into the high-temperature safety agent storage tank. Under the condition, the high-temperature safety agent for heating the system can be input into the temperature control pipeline system, and the low-temperature safety agent for cooling the system can be input into the temperature control system, so that the system is more flexible and comprehensive to control, and the energy can be greatly saved.
The safener may be: one or more of carbon dioxide, nitrogen, argon, helium, sulfur dioxide, heptafluoropropane and perfluoro isopropyl hexanone; or one or more of alkyl phosphate, aromatic phosphate, phosphite, phosphazene, phosphorus-halogen organic compound, tricresyl phosphate, dimethyl methyl phosphate, hexamethylphosphoramide, tetrabromobisphenol, phosphaphenanthrene derivative, nitrogen phosphorus alkene additive and phosphazene compound; or water, silicone oil, halon fire extinguishing agent or aerosol fire extinguishing agent, etc.
The invention has the advantages that:
1) according to the invention, the safety pipeline system and the temperature control pipeline system are combined in the energy storage battery system, so that the system structure is simplified, the idle waste of the safety agent is avoided, and the system cost is greatly saved;
2) the temperature of the energy storage battery system can be conveniently and flexibly controlled to be evenly distributed by arranging the temperature control pipeline, and the temperature of the battery system can be accurately and flexibly controlled by controlling the temperature or the flow of the safety agent in the temperature control pipeline;
3) the liquid heating mode with the safety agent as a heat transfer medium is adopted, so that the dependence of an electric heating mode or an air conditioner heating mode on electric energy can be effectively avoided, and other types of energy are fully utilized to realize the temperature control of the safety agent, such as solar energy, wind energy, geothermal energy and the like.
Drawings
Fig. 1 is a schematic diagram of an energy storage battery system according to a first embodiment of the invention;
fig. 2 is a schematic diagram of an energy storage battery system according to a second embodiment of the invention;
fig. 3 is a schematic diagram of an energy storage battery system according to a third embodiment of the invention;
fig. 4 is a schematic diagram of an energy storage battery system according to a fourth embodiment of the invention;
fig. 5 is a schematic diagram of an energy storage battery system according to a fifth embodiment of the invention.
List of reference numerals
1-Battery cell
101-injection port
102-discharge port
2-safener storage tank
201-high temperature safener storage tank
202-low temperature safener storage tank
3-recovery tank
401-temperature control pipeline main pipe
401 a-temperature control line first main pipe
401 b-temperature control line second main pipe
402-temperature control pipeline branch
5-heating device
6-pumping device
601-first liquid Pump
602-second liquid Pump
701-safener injection line
702-safety line main pipe
703-discharge line
8-outer casing
9-Cooling device
Detailed Description
The invention will be further explained by embodiments in conjunction with the drawings.
Fig. 1 is a schematic diagram of an energy storage battery system according to a first embodiment of the invention. In the embodiment shown in fig. 1, the energy storage battery system includes a plurality of battery cells 1, a safety agent storage tank 2, a recovery tank 3, a safety piping system, and a temperature control piping system. In the temperature control pipeline system, the temperature control pipeline may include a temperature control pipeline main pipe 401 and a plurality of temperature control pipeline branch pipes 402, the heating device 5 and the pumping device 6 are disposed on the temperature control pipeline main pipe 401, and each temperature control pipeline branch pipe 402 corresponds to one battery cell 1 and is disposed around the battery cell, that is, may heat for each battery cell 1. In this embodiment, the safety pipeline system is a subsystem of the temperature control pipeline system, one end of the safety agent injection pipeline 701 is connected to the temperature control pipeline and the other end is connected to the injection port 101 of the battery cell, one end of the discharge pipeline 703 is connected to the recovery tank 3 and the other end is connected to the discharge port 102 of the battery cell, and valves may be provided on both the safety agent injection pipeline 701 and the discharge pipeline 703.
The safener such as carbon dioxide in the safener storage tank 2 enters the temperature control pipeline main pipe 401, is heated to 60 ℃ by the heating device 5 and then is pumped into the temperature control pipeline branch pipe 402 by the pumping device 6, and after the battery unit 1 is heated, the safener flows back into the safener storage tank 2. The safener may be continuously or intermittently circulated in the temperature controlled circuit. When a certain battery cell fails, a valve on the safety agent injection pipeline 701 corresponding to the battery cell is opened, so that the safety agent in the temperature control pipeline rapidly enters the shell of the failed battery cell through the safety agent injection pipeline 701 and the injection port 101 of the battery cell, and fluids such as gas and electrolyte in the shell of the battery cell are discharged into the recovery tank 3 through the discharge pipeline 703.
Fig. 2 is a schematic diagram of an energy storage battery system according to a second embodiment of the invention. In the embodiment shown in fig. 2, the difference from the embodiment shown in fig. 1 is mainly that, instead of heating for each battery cell 1, at least one unheated battery cell is spaced between two heated battery cells. Because the battery monomer 1 can generate heat during the operation, the temperature control pipeline can be flexibly arranged aiming at the battery monomer in a low-temperature area according to the arrangement mode of a plurality of battery monomers, and the temperature control pipeline does not need to be arranged aiming at each battery monomer, so that the system structure is simplified and the cost is saved.
The safener such as heptafluoropropane in the safener storage tank 2 enters the temperature control pipeline main pipe 401, is heated to 75 ℃ by the heating device 5 and then enters the temperature control pipeline branch pipe 402, and flows back to the safener storage tank 2 after the corresponding battery cell with lower temperature is heated. The safener circulates in the temperature-controlled line. When a certain battery cell fails, a valve on the safety agent injection pipeline 701 corresponding to the battery cell is opened, so that the safety agent in the temperature control pipeline rapidly enters the shell of the failed battery cell through the safety agent injection pipeline 701 and the injection port 101 of the battery cell, and fluids such as gas and electrolyte in the shell of the battery cell are discharged into the recovery tank 3 through the discharge pipeline 703.
Fig. 3 is a schematic diagram of an energy storage battery system according to a third embodiment of the invention. In the embodiment shown in fig. 3, the difference from the embodiment shown in fig. 1 is mainly that the energy storage battery system further includes an outer casing 8, and the plurality of battery cells 1 are accommodated in the outer casing 8. The temperature control pipeline is arranged on the inner wall of the outer shell 8, so that the battery monomer contained in the outer shell 8 can be integrally heated. Different heating can be carried out for different positions in the outer shell 8 by distributing the density on the inner walls of different sides of the outer shell 8 or the density at different positions on the inner wall of the same side through the temperature control pipeline.
The safener such as silicon oil in the safener storage tank 2 enters a temperature control pipeline, is heated to 90 ℃ by the heating device 5 and then enters the temperature control pipeline arranged on the inner wall of the outer shell 8, and flows back into the safener storage tank 2 after heating the compatible battery monomer arranged in the outer shell 8. The safener injection line 701 is in fluid communication with the temperature control line. When a certain battery cell fails, a valve on the safety agent injection pipeline 701 corresponding to the battery cell is opened, so that the safety agent in the temperature control pipeline rapidly enters the shell of the failed battery cell through the safety agent injection pipeline 701 and the injection port 101 of the battery cell, and fluids such as gas and electrolyte in the shell of the battery cell are discharged into the recovery tank 3 through the discharge pipeline 703.
Fig. 4 is a schematic diagram of an energy storage battery system according to a fourth embodiment of the invention. In the embodiment shown in fig. 4, the temperature control piping system and the safety piping system are independent of each other. One path of the safety agent in the safety agent storage tank 2 is heated by the temperature control pipeline main pipe 401 and the temperature control pipeline branch pipe 402 and then returns to the safety agent storage tank 2, the other path of the safety agent in the safety agent storage tank 2 is injected into the battery unit through the safety pipeline main pipe 702 and the safety agent injection pipeline 701, and the fluid in the battery unit is discharged into the recovery tank 3 through the discharge pipeline 703. The temperature control line main pipe 401 may be provided with a heating device 5, and the safety line main pipe 702 may be provided with a cooling device 9.
The safety agent such as nitrogen in the safety agent storage tank 2 enters the temperature control pipeline main pipe 401, is heated to 80 ℃ by the heating device 5 and then enters the temperature control pipeline branch pipe 402, and after the battery cells corresponding to the temperature control pipeline branch pipe 402 are heated, the safety agent flows back to the safety agent storage tank 2. The safety agent in the safety agent storage tank 2 can also be filled in the safety pipeline main pipe 702 and the safety agent injection pipeline 701 in advance, when a certain battery cell has a fault, a valve on the safety agent injection pipeline 701 corresponding to the battery cell is opened, the safety agent in the safety agent injection pipeline 701 quickly enters the battery cell, the safety agent in the safety agent storage tank 2 is cooled by the cooling device 9 and then is continuously supplied to the safety agent injection pipeline 701, so that the cooled safety agent at 10 ℃ for example is quickly injected into a battery cell shell to cool a thermal runaway single battery and prevent the thermal runaway single battery from burning and exploding. The fluid such as gas and electrolyte in the outer case of the battery cell is discharged to the recovery tank 3 through the discharge pipe 703. The embodiment simultaneously realizes the functions of heating the energy storage battery system by using the safety agent and cooling the fault battery by using the safety agent, so that the heating effect and the thermal runaway control effect of the energy storage battery system can be optimized.
Fig. 5 is a schematic diagram of an energy storage battery system according to a fifth embodiment of the invention. In the embodiment shown in fig. 5, the safener storage tanks include a high temperature safener storage tank 201 and a low temperature safener storage tank 202, the high temperature safener storage tank 201 stores water at a higher temperature, and the low temperature safener storage tank 202 stores water at a lower temperature. The valve on the line between the high temperature safener storage tank 201 and the low temperature safener storage tank 202 is closed. The high-temperature safener storage tank 201 is connected to the low-temperature safener storage tank 202 via a temperature control pipeline first main pipe 401a, a temperature control pipeline branch pipe 402, and a temperature control pipeline second main pipe 401 b. The temperature control line first main pipe 401a may be provided with a first liquid pump 601 and a heating device 5, and the temperature control line second main pipe 401b may be provided with a second liquid pump 602 and a cooling device 9. The safener in the high temperature safener storage tank 201 may flow into the low temperature safener storage tank 202 via a pipe in a first direction, and the safener in the low temperature safener storage tank 202 may flow into the high temperature safener storage tank 201 via a pipe in a second direction opposite to the first direction. The safety piping system is connected between the temperature control piping branch pipe 402 and the recovery tank 3 as a subsystem of the temperature control piping system.
When the energy storage battery system needs to be heated, for example, at night, during low-power battery operation, in winter, etc., the high-temperature safety agent storage tank 201 injects the safety agent heated to about 70 ℃ into the temperature control pipeline branch pipe 402 via the temperature control pipeline first main pipe 401a, the first liquid pump 601 and the heating device 5, after the safety agent in the temperature control pipeline branch pipe 402 heats the corresponding battery cell, the safety agent with the temperature reduced to about 40 ℃ enters the low-temperature safety agent storage tank 202 via the temperature control pipeline second main pipe 401b, and at this time, the cooling device 9 and the second liquid pump 602 arranged on the temperature control pipeline second main pipe 401b may not operate. When the energy storage battery needs to be cooled, for example, during daytime, during high-power operation of the battery, in summer and the like, the low-temperature safety agent storage tank 202 injects the safety agent cooled to about 25 ℃ into the temperature control pipeline branch pipe 402 via the temperature control pipeline second main pipe 401b, the second liquid pump 602 and the cooling device 9, after the safety agent in the temperature control pipeline branch pipe 402 cools the corresponding battery cell, the safety agent with the temperature raised to about 50 ℃ enters the high-temperature safety agent storage tank 201 via the temperature control pipeline first main pipe 401a, and at this time, the heating device 5 and the first liquid pump 601 arranged on the temperature control pipeline first main pipe 401a may not operate. When the energy storage battery system needs to be heated, the safener with higher temperature in the high-temperature safener storage tank can be utilized, so that the energy consumption of the heating device 5 can be reduced; when the energy storage battery system needs to be cooled, the safener with lower temperature in the low-temperature safener storage tank can be utilized, so that the energy consumption of the cooling device 9 can be reduced. Therefore, the overall energy consumption of the energy storage battery system can be greatly reduced. In addition, when the safety agent needs to be injected into the failed battery cell, the safety agent in the low-temperature safety agent storage tank 202 can be directly utilized, or the safety agent in the low-temperature safety agent storage tank 202 can be further cooled and then injected into the battery cell 1, so that the safety of the system can be greatly improved. The energy storage battery system of the embodiment is more flexible in application, safer in system and lower in energy consumption.
The specific embodiments of the present invention are not intended to be limiting of the invention. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (11)
1. An energy storage battery system, comprising: the battery comprises a plurality of battery monomers, wherein an injection port and a discharge port are arranged on a battery monomer shell of each battery monomer; a safener storage tank containing a safener therein; a recovery tank for recovering a fluid discharged from the battery cell; a safety piping system in which a safety agent injection pipe and a discharge pipe are provided for each of the battery cells, a safety agent can enter the battery cell via the safety agent injection pipe and the injection port and a fluid in the battery cell can be discharged into the recovery tank via the discharge port and the discharge pipe, a valve being provided on each of the safety agent injection pipes; the temperature control pipeline system comprises a temperature control pipeline and a heating device, the safety agent in the safety agent storage tank enters the temperature control pipeline, the safety agent flowing through the temperature control pipeline is heated by the heating device, the temperature control pipeline is close to at least one of the battery monomer shells of the plurality of battery monomers, the safety agent after heat exchange returns to the safety agent storage tank, the safety agent in the safety agent storage tank circularly flows in the temperature control pipeline system, and when a certain battery monomer breaks down, a valve on the safety agent injection pipeline is opened, so that the safety agent enters the battery monomer with the fault through the safety agent injection pipeline and the injection port of the battery monomer with the fault.
2. The energy storage battery system according to claim 1, wherein two battery cells respectively adjacent to the temperature control pipeline are spaced from each other by n battery cells not adjacent to the temperature control pipeline, wherein n is greater than or equal to 1.
3. The energy storage battery system of claim 1, further comprising an outer casing containing the plurality of battery cells, wherein the temperature control pipeline is disposed on an inner wall of the outer casing to heat the plurality of battery cells contained in the outer casing.
4. The energy storage battery system according to any one of claims 1 to 3, wherein the safety agent injection line is connected to the temperature-controlled line, and when a valve on the safety agent injection line is opened, the safety agent circulating in the temperature-controlled line enters the cell housing via the safety agent injection line.
5. The energy storage battery system according to any one of claims 1 to 3, wherein the safety agent injection line is connected to the safety agent tank, and when a valve on the safety agent injection line is opened, the safety agent in the safety agent tank enters the battery cell housing via the safety agent injection line.
6. The energy storage battery system of claim 5, wherein a cooling device is provided in the safety pipe system to cool the safety agent injected into the battery cell housing to 0-25 ℃.
7. The energy storage battery system of any of claims 1 to 3, wherein the heating device heats the safety agent in the temperature controlled line to 60 ℃ to 90 ℃.
8. The energy storage battery system according to any one of claims 1 to 3, wherein the safener storage tank comprises a high-temperature safener storage tank and a low-temperature safener storage tank, the temperature of the safener in the high-temperature safener storage tank is higher than that of the safener in the low-temperature safener storage tank, a pipeline is arranged between the high-temperature safener storage tank and the low-temperature safener storage tank, a valve is arranged on the pipeline between the high-temperature safener storage tank and the low-temperature safener storage tank, the safener in the high-temperature safener storage tank can flow through the temperature control pipeline system and then return to the low-temperature safener storage tank, and the safener in the low-temperature safener storage tank can flow through the temperature control pipeline system and then return to the high-temperature safener storage tank.
9. The energy storage battery system according to any one of claims 8, wherein the high-temperature safety agent storage tank is connected to the temperature control pipeline via the heating device, and the energy storage battery system is further provided with a cooling device, and the low-temperature safety agent storage tank is connected to the temperature control pipeline via the cooling device.
10. The energy storage battery system according to any one of claims 1 to 3, wherein a temperature sensor is provided in or on a surface of the cell housing, and a temperature of the safety agent in the temperature control line is adjusted in accordance with a measured temperature of the temperature sensor; or a temperature sensor is arranged in the battery monomer shell or on the surface of the battery monomer shell, a flow valve is arranged on the temperature control pipeline, and the flow or the flow speed of the safety agent passing through the flow valve is adjusted according to the measured temperature of the temperature sensor.
11. The energy storage battery system of claim 10, wherein the plurality of cells are divided into different groups, the temperature controlled conduit is divided into a plurality of branches and a respective control valve is provided on each branch, and the temperature, flow or velocity of the safety agent on each branch is adjusted according to the measured temperature of the cells of the different groups such that the temperature of the cells of the different groups is the same or similar.
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Address after: No. 1, 1st Floor, Building 4, No. 10, South 3rd Road, Shodu, Wuhou District, Chengdu City, Sichuan Province, 610043 Patentee after: Haofengguang Energy storage (Chengdu) Co.,Ltd. Address before: 1711, 17th floor, building 2, yard 1, Shangdi 10th Street, Haidian District, Beijing 100085 Patentee before: Beijing Hawaga Power Storage Technology Co.,Ltd. |
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