CN116111234B - Immersed safety energy storage battery - Google Patents
Immersed safety energy storage battery Download PDFInfo
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- CN116111234B CN116111234B CN202310384895.2A CN202310384895A CN116111234B CN 116111234 B CN116111234 B CN 116111234B CN 202310384895 A CN202310384895 A CN 202310384895A CN 116111234 B CN116111234 B CN 116111234B
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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
- H01M10/63—Control systems
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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
- H01M10/6554—Rods or plates
- H01M10/6555—Rods or plates arranged between the cells
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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
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
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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
Abstract
The application relates to an immersed type safe energy storage battery, which relates to the technical field of energy storage batteries, and comprises a battery box body, wherein cooling liquid is filled in the battery box body; the battery cells are arranged in an array manner and immersed in the cooling liquid, gaps are reserved between the adjacent battery cells, and a battery cell pressure release valve is arranged on the shell of each battery cell; and the runner partition plate is arranged in a gap between the adjacent electric cores and is abutted against the two adjacent electric cores, a hollow runner and a hollowed-out groove facing the electric cores are arranged in the runner partition plate, and cooling liquid is filled in the runner and the hollowed-out groove. The thermal failure process of the single battery can be interrupted or inhibited, other batteries are prevented from being subjected to chain reaction, and the safety and the service life of the energy storage battery are improved.
Description
Technical Field
The application relates to the field of energy storage battery technology, in particular to an immersed safety energy storage battery.
Background
The energy storage battery is mainly used for solar power generation equipment and wind power generation equipment and can store renewable energy.
The energy storage batteries are divided into three types, namely 1, a lead-acid battery for exhaust energy storage, namely a battery with a device capable of supplementing liquid and separating out gas on a battery cover. 2. Valve-regulated lead acid storage batteries-batteries in which the individual cells are sealed but all have a valve that allows gas to escape when the internal pressure exceeds a certain value. 3. Lead-acid battery for colloid energy storage-battery using colloid electrolyte.
With the increase of charge and discharge times, the energy storage battery is at risk of capacity reduction or even failure, the energy efficiency of the energy storage battery is affected when the energy storage battery is light, and fire accidents can be caused when the energy storage battery is heavy. After the cell of the energy storage battery fails, the internal electrolyte can react vigorously to generate heat, the temperature of the heat rises, the battery shell deforms, the safety valve is opened, and gas and dense smoke are sprayed out and have open flame and the like; and further affects the continued failure of the peripheral cells, causing a chain reaction until explosion.
Disclosure of Invention
The purpose of this application is to provide a submergence formula safety energy storage battery, can break or restrain the thermal failure process of monomer electric core, prevent that other electric cores from being by chain reaction, improve energy storage battery's security and life.
The application provides an immersion type safe energy storage battery which adopts the following technical scheme:
an immersed safety energy storage battery comprising:
the battery box body is internally filled with cooling liquid;
the battery cells are arranged in an array manner and immersed in the cooling liquid, gaps are reserved between the adjacent battery cells, and a battery cell pressure release valve is arranged on the shell of each battery cell; and
the runner baffle is arranged in a gap between adjacent electric cores and is abutted against the two adjacent electric cores, a hollow runner and a hollowed-out groove facing the electric cores are arranged in the runner baffle, and cooling liquid is filled in the runner and the hollowed-out groove.
By adopting the technical scheme, the battery cell is immersed in the battery box body by the cooling liquid, the temperature in the failure of the battery cell is increased, a large amount of smoke is generated, the battery cell pressure release valve is broken through to spray outwards, the cooling liquid flows into the battery cell through the battery cell pressure release valve to perform phase change cooling, the cooling is more efficient from the inside of the battery cell, the two sides of the battery cell are supported and fixed by the partition plate and hardly deform, and the battery cell is faster than the pressure increase in the deformed state and is failed in advance; meanwhile, the electrolyte in the battery cell is quickly neutralized, diluted and cooled by the cooling liquid, so that other batteries are prevented from being subjected to chain reaction.
Optionally, the runner baffle includes two parts boards of relative setting, is provided with the combination supporting shoe between two parts boards, and two parts boards pass through the combination supporting shoe butt and connect, and the centre forms the runner.
Through adopting above-mentioned technical scheme, the runner baffle comprises two part boards to the combination supporting shoe supports between two part boards, can control the distance between two part boards, and then the reasonable distance between the control electric core.
Optionally, the part board butt is on the shell of electric core, and fretwork groove evenly distributed is on the part board.
By adopting the technical scheme, the hollow grooves of the flow passage partition plates are internally provided with the cooling liquid, and the cooling liquid is heated to generate phase change so as to prevent the heat of the failed battery cells from being transmitted to the peripheral battery cells; and when the battery cell works normally, the cooling liquid has a certain temperature rise, and the part of heat is taken away by the cooling liquid circulation system, so that the temperature of the cooling liquid is ensured to be moderate, and the working environment temperature requirement of the battery cell is further met.
Optionally, the bottom of battery box is provided with the battery support, and the battery support can be dismantled and connect on the battery box, and the electricity core can be dismantled and connect on the battery support.
Through adopting above-mentioned technical scheme, in battery bracket easy to assemble to the battery box, the electric core is installed on battery bracket conveniently, makes electric core mounted position more regular.
Optionally, the battery box body is connected with a cooling liquid circulation system, and the cooling liquid circulation system comprises a circulation pipeline with two ends connected to the battery box body, and a circulation valve, a heat exchange device, a cooling liquid tank and a circulation pump which are sequentially connected to the circulation pipeline;
the circulating pipeline comprises an outlet circulating pipeline and an inlet circulating pipeline, the outlet circulating pipeline is connected between one end of the battery box body and the circulating valve, and the inlet circulating pipeline is connected between the other end of the battery box body and the circulating pump;
the inlet circulation pipeline is also provided with a liquid supply one-way valve.
One end of the outlet circulation pipeline connected with the battery box body is positioned below the liquid level of the cooling liquid and above the cell pressure release valve, and the other end of the inlet circulation pipeline connected with the battery box body is positioned below the liquid level of the cooling liquid and above the battery bracket.
By adopting the technical scheme, the cooling liquid circulation system operates when the failed battery cell does not spray and the battery cell works normally. When the battery cell works normally, the battery cell emits a small amount of heat, so that the cooling liquid generates a certain temperature rise, the circulating pump brings the cooling liquid with the temperature rise into the heat exchange device to exchange heat, and then the cooling liquid with the temperature reduced is supplied to the battery box body. The liquid level of the cooling liquid in the battery box body can be ensured. Thereby reaching the environmental temperature which meets the working condition of the battery cell. When the battery core fails and erupts, the control system increases the rotation speed of the circulating pump and closes the circulating valve, so that the supply of the cooling liquid can be rapidly increased, the liquid level of the cooling liquid in the battery box body is ensured, the process of breaking the thermal failure of the battery core can be intervened in advance, and peripheral batteries are isolated and protected from being influenced.
Through adopting above-mentioned technical scheme, coolant liquid supplies the liquid check valve, can prevent that the increase of battery box internal pressure from returning the coolant liquid and pressing back the liquid after the battery core inefficacy erupts, cause the liquid level of coolant liquid in the battery box to reduce.
Optionally, the device further comprises a liquid supplementing control system, wherein the liquid supplementing control system comprises a liquid level sensor arranged in the battery box, a smoke detector arranged in the battery box and positioned above the liquid level of the cooling liquid, and a controller electrically connected with the liquid level sensor and the smoke detector, and the controller is respectively electrically connected with the circulating valve and the circulating pump to control the opening and closing states of the circulating valve and the opening increase and decrease of the circulating pump. When the liquid level of the cooling liquid is reduced by the low supercooling liquid level sensor, a feedback controller is needed, the rotating speed of the circulating pump is increased, the supply flow of the cooling liquid is increased, and the liquid level of the cooling liquid in the battery box body is ensured.
Through adopting above-mentioned technical scheme, there is impurity pollution coolant liquid after the inside gaseous eruption of electric core inefficacy reaction to trigger smoke detector, the controller receives the response signal and close the circulation valve, stops the coolant liquid and leads out, guarantees that electric core blowout impurity can not pollute the coolant liquid in the heat transfer device, and the confession liquid check valve of confession liquid pipe end also can guarantee that the coolant liquid can not flow back, also can guarantee that electric core spun impurity can not get into outside coolant liquid circulation system.
Optionally, a box body safety valve is arranged on the battery box body, and the height of the box body safety valve is higher than the liquid level of the cooling liquid.
Through adopting above-mentioned technical scheme, if the gas pressure is too big in the battery box, can carry out the pressure release through the box relief valve, avoid the explosion that the internal atmospheric pressure of battery box is too big.
Optionally, the boiling point temperature of the cooling liquid is 45-110 ℃.
Through adopting above-mentioned technical scheme, the coolant liquid absorbs heat and takes place the phase transition easily, and then cools off the inside electric core fast, can control the peripheral temperature of inefficacy electric core on the one hand and do not influence other electric cores, on the other hand can satisfy coolant liquid circulative cooling simultaneously and can both operate throughout the year.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the method, the cooling liquid flows into the battery core through the battery core pressure release valve to perform phase change cooling, the battery core is cooled more efficiently, the two sides of the battery core are supported and fixed by the partition plate and hardly deform, and the pressure rise is faster than that of the deformed state, so that the failure of the battery core is displayed earlier; meanwhile, the electrolyte in the battery cell is quickly neutralized, diluted and cooled by the cooling liquid, so that other batteries are prevented from being subjected to chain reaction.
2. The battery is provided with a cooling liquid circulation system, the battery is operated when the failed battery core does not spray and the battery core normally works, the cooling liquid absorbs heat to generate certain temperature rise, the cooling liquid enters the heat exchange device along the circulation pipeline to release heat, the cooling liquid cools down, enters the cooling liquid tank along the pipeline, and then flows back to the battery box body along the circulation pipeline through the liquid supply check valve via the circulation pump, so that the temperature of the cooling liquid in the battery box body is regulated, and the working environment temperature of the battery core is further ensured.
3. The battery is provided with the liquid supplementing control system, the battery is opened after the failed battery cell is sprayed, the smoke detector feedback control system is closed, the circulating valve is closed, the battery cell is prevented from spraying impurities into the cooling liquid circulating system, the pressure in the battery box body is increased due to the fact that the battery cell is sprayed, and the phenomenon of backflow of the cooling liquid is possible, so that the arranged liquid supplying one-way valve is used for preventing the pressure in the battery box body from being increased, the battery cell spraying impurities from flowing back into the cooling liquid circulating system, on the other hand, the cooling liquid flows into the battery cell from the battery cell pressure relief valve, the liquid level of the cooling liquid in the battery box body is reduced, the liquid level sensor feedback control system is required to increase the rotating speed of the circulating pump, and the liquid level of the cooling liquid in the battery box body is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a single cell module according to an embodiment of the present application;
FIG. 2 is a schematic view of the structure of the flow channel separator of the present application;
FIG. 3 is a schematic structural view of the part plate of the present application;
fig. 4 is a schematic structural diagram of a multi-battery module according to an embodiment of the present application.
In the figure, 1, a battery box body; 11. a battery holder; 12. a box body safety valve; 2. the battery cell, 21, the battery cell relief valve; 3. a flow passage partition; 31. a flow passage; 32. a hollow groove; 33. a part plate; 34. combining the supporting blocks; 41. an outlet circulation line; 42. a circulation valve; 43. a heat exchange device; 44. a cooling liquid tank; 45. a circulation pump; 46. a liquid supply one-way valve; 47. an inlet circulation line; 51. a liquid level sensor; 52. a smoke detector; 53. an inlet CDU; 54. an outlet CDU; 61. a No. 1 battery module; 62. a No. 2 battery module; 63. a No. 3 battery module; 421. a branch I outlet circulation valve; 422. a branch II outlet circulation valve; 423. a branch III outlet circulation valve; 431. a branch I inlet circulation valve; 432. a branch II inlet circulation valve; 433. a branch III inlet circulation valve; 461. a branch I liquid supply one-way valve; 462. a branch II liquid supply one-way valve; 463. and a branch III liquid supply one-way valve.
Detailed Description
The present application is described in further detail below with reference to fig. 1-4.
The application provides an immersion type safe energy storage battery, refer to fig. 1, this energy storage battery includes battery box 1, electric core 2, runner baffle 3, coolant circulation system, fluid replacement control system, store the coolant liquid in the battery box 1, electric core 2 and runner baffle 3 are installed in battery box 1, and submergence is in the coolant liquid, coolant circulation system and fluid replacement control system all settle in the outside of battery box 1, coolant circulation system is used for controlling the temperature of coolant liquid in the battery box 1 and then satisfies the normal operational environment temperature of electric core 2, fluid replacement control system is used for controlling in the battery box 1 from coolant liquid circulation state switch into fluid replacement control state, thereby make coolant liquid can submergence electric core 2 completely in to battery box 1.
The battery box 1 is of a sealed box structure, cooling liquid is filled in the battery box, the boiling point temperature range of the cooling liquid is 45-110 ℃, the cooling liquid can be electronic fluorinated liquid or perfluorinated hexanone, the temperature of the cooling liquid is preferably 47 ℃, and the cooling liquid in the battery core 2 absorbs heat to 47 ℃ and can be boiled and gradually converted into a gaseous state. Gaseous coolant overflows from the inside space that is full of in battery box 1 of electricity core 2, causes the atmospheric pressure in the battery box 1 to rise, installs box relief valve 12 at the top of battery box 1, breaks through the settlement pressure value of box relief valve 12 when the atmospheric pressure in the battery box 1, will open box relief valve 12, discharges the pressure in the battery box 1, prevents that the internal pressure of battery box 1 from being too big, improves the security of battery.
The bottom of battery box 1 is provided with battery support 11, and battery support 11 can be dismantled and connect on battery box 1's diapire, and electric core 2 can be dismantled and connect on battery support 11 to neatly be array arrangement on battery support 11, leave the clearance between the adjacent electric core 2, runner baffle 3 connect in the clearance of two adjacent electric cores 2 and with two adjacent electric cores 2 butt, can control the distance between the adjacent electric core 2 through the thickness of adjustment runner baffle 3.
A plurality of battery cells 2 are arranged in each battery box body 1, the battery cells 2 can be arranged in a row or two rows, the battery cells 2 are arranged into a block structure, a battery cell pressure release valve 21 is arranged at the top of the shell of the battery cell 2, and the battery cell pressure release valve 21 is also immersed in cooling liquid. When the battery cell 2 fails, heat is generated in the battery cell and a large amount of gas is discharged, so that the internal air pressure of the battery cell 2 is increased, the battery cell pressure release valve 21 is broken through after the air pressure is increased, the battery cell pressure release valve 21 is opened, the gas is discharged, and the cooling liquid reversely enters the battery cell 2 through the battery cell pressure release valve 21, so that the failure reaction of the battery cell 2 is rapidly broken or inhibited.
Referring to fig. 1, a coolant circulation system is connected to the outside of the battery case 1, the coolant circulation system including an outlet circulation line 41, a circulation valve 42, a heat exchange device 43, a coolant tank 44, a circulation pump 45, a liquid supply check valve 46, and an inlet circulation line 47. The outlet circulation line 41 is disposed at a height higher than the height of the battery cell 2 in the battery case 1 and lower than the level of the coolant in the battery case 1, and the inlet circulation line 47 is disposed at a height lower than the level of the coolant and higher than the height of the battery holder 11. The battery normally works and emits a small amount of heat, the cooling liquid around the battery core generates a certain temperature rise, the cooling liquid with high temperature flows into the heat exchange device 43 along the outlet circulation pipeline 41 through the circulation valve 42, the heat is released, the cooling liquid is cooled, the cooling liquid with low temperature flows into the cooling liquid tank 44, and the circulating pump 45 returns the low-temperature cooling liquid into the battery box body 1 along the inlet circulation pipeline 47 through the liquid supply one-way valve 46. The liquid level of the cooling liquid in the battery box body 1 and the working environment temperature of the battery cell 2 are ensured.
The liquid supplementing control system comprises a liquid level sensor 51, a smoke detector 52 and a controller, wherein the smoke detector 52 is connected to the liquid level of the cooling liquid in the battery box body 1, the cooling liquid is prevented from being soaked by the cooling liquid, the liquid level sensor 51 is placed at a position higher than the upper side of the battery core 2 and lower than the smoke detector 52, the controller is arranged outside the battery box body 1 and is electrically connected with the liquid level sensor 51 and the smoke detector 52, receives induction signals sent by the liquid level sensor 51 and the smoke detector 52, and is electrically connected with the circulating valve 42 and the circulating pump 45 respectively to control the states of the circulating valve 42 and the circulating pump 45. When the liquid level of the cooling liquid is reduced to be lower than the liquid level sensor 51, a feedback controller is needed, the rotating speed of the circulating pump 45 is increased, the supply flow of the cooling liquid is increased, and the liquid level of the cooling liquid in the battery box body 1 is ensured.
Referring to fig. 2 and 3, the flow path spacer 3 is installed in a gap between adjacent cells 2 and abuts against the adjacent two cells 2. The runner partition plate 3 comprises two oppositely arranged part plates 33, the part plates 33 are rectangular plate bodies, a plurality of hollowed-out grooves 32 penetrating through two side surfaces are uniformly distributed on the plate body surfaces, the part plates 33 are made of heat-insulating materials such as ceramics, and the purpose is to prevent heat conduction of failed battery cells 2 to peripheral battery cells 2. A combined supporting block 34 is arranged between the two part plates 33, the combined supporting block 34 is formed by arranging nine combined supporting blocks in three horizontal rows and three vertical rows on the same side surface of the part plates 33, and the combined supporting block 34 can be independently arranged on one part plate 33 or can be arranged on the two part plates 33 and integrally formed with the part plates 33; in this embodiment, two component plates 33 are provided with a combined support block 34, and the two component plates 33 are connected by abutting connection of the combined support block 34 and can be fixed by bolts, a flow channel 31 is formed between the two component plates 33, cooling liquid can be filled in the flow channel 31 and the hollow groove 32 and directly contacts with the side surface of the battery cell 2, and when the battery cell 2 fails, the cooling liquid is heated to change phase, so that the failed battery cell 2 can be prevented from conducting heat to the peripheral battery cell 2.
Referring to fig. 4, 3 battery module embodiments are shown.
When the cooling liquid circulation system is applied to the 3 battery modules, an inlet CDU (namely a cooling liquid distribution unit), a branch I inlet circulation valve, a branch I liquid supply one-way valve, a branch II inlet circulation valve, a branch II liquid supply one-way valve, a branch III inlet circulation valve, a branch III liquid supply one-way valve, a branch I outlet circulation valve, a branch II outlet circulation valve and a branch III outlet circulation valve are required to be arranged.
The 3 battery modules are a No. 1 battery module 61, a No. 2 battery module 62 and a No. 3 battery module 63 respectively; one side of the three battery boxes of the No. 1 battery module 61, the No. 2 battery module 62 and the No. 3 battery module 63 are respectively communicated with the inlet CDU53, and the other sides of the three battery boxes of the No. 1 battery module 61, the No. 2 battery module 62 and the No. 3 battery module 63 are respectively communicated with the outlet CDU54. The inlet CDU53 and the outlet CDU54 are communicated with a cooling liquid pipeline, and the cooling liquid pipeline is sequentially provided with a heat exchange device 43, a cooling liquid tank 44 and a circulating pump 45 from the outlet CDU54 to the inlet CDU 53.
The outlet circulation pipeline of the No. 1 battery module 61 communicated with the outlet CDU54 is provided with a branch I outlet circulation valve 421,1, and the inlet circulation pipeline of the No. 61 battery module 61 communicated with the inlet CDU53 is sequentially provided with a branch I inlet circulation valve 431 and a branch I liquid supply one-way valve 461 from the near end of the inlet CDU53 to the far end of the inlet CDU 53. The branch II outlet circulation valve 422,2 is arranged on the outlet circulation pipeline of the No. 2 battery module 62 communicated with the outlet CDU54, and the branch II inlet circulation valve 432 and the branch II liquid supply one-way valve 462 are sequentially arranged from the near end of the inlet CDU53 to the far end of the inlet CDU53 on the inlet circulation pipeline of the No. 62 battery module communicated with the inlet CDU 53. The outlet circulation pipeline of the No. 3 battery module 63 communicated with the outlet CDU54 is provided with a branch III outlet circulation valve 423,3, and the inlet circulation pipeline of the No. 63 communicated with the inlet CDU53 is sequentially provided with a branch III inlet circulation valve 433 and a branch III liquid supply one-way valve 463 from the near end of the inlet CDU53 to the far end of the inlet CDU 53.
Assuming that the battery core in the No. 1 battery module fails to spray, the liquid supplementing control system is opened, the smoke detector feedback control system of the No. 1 battery module is closed, the branch I outlet circulation valve 421 is closed, and the impurity sprayed by the battery core of the No. 1 battery module is prevented from entering the cooling liquid circulation system; as the cooling liquid flows into the battery core of the No. 1 battery module through the battery core pressure release valve of the No. 1 battery module, the liquid level of the cooling liquid in the battery box of the No. 1 battery module is reduced, the liquid level sensor of the No. 1 battery module 61 feeds back the control system, the circulating pump 45 increases the rotating speed, meanwhile, the branch II inlet circulating valve 432 is closed, the branch III inlet circulating valve 433 is closed, and thus the cooling liquid of the cooling liquid circulating system does not enter the battery box of the No. 2 battery module 62 or the No. 3 battery module 63; thereby the cooling liquid of the cooling liquid circulation system is intensively supplied to the No. 1 battery module, and the liquid level of the cooling liquid in the battery box body of the No. 1 battery module 61 is ensured.
The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (7)
1. An immersion type safety energy storage battery, comprising:
a battery box body (1) filled with a cooling liquid;
the battery cells (2) are arranged in an array manner in the battery box body (1) and immersed in the cooling liquid, gaps are reserved between the adjacent battery cells (2), and a battery cell pressure release valve (21) is arranged on the shell of each battery cell (2); and
the flow passage partition plate (3) is arranged in a gap between the adjacent electric cores (2) and is abutted against the two adjacent electric cores (2), a hollow flow passage (31) and a hollowed-out groove (32) facing the electric cores (2) are arranged in the flow passage partition plate (3), and cooling liquid is filled in the flow passage (31) and the hollowed-out groove (32);
the flow passage partition plate (3) comprises two oppositely arranged part plates (33), a combined supporting block (34) is arranged between the two part plates (33), the two part plates (33) are in butt connection through the combined supporting block (34), and a flow passage (31) is formed in the middle;
the part plate (33) is abutted to the shell of the battery cell (2), and the hollowed-out grooves (32) are uniformly distributed on the part plate (33).
2. The submerged safety energy storage battery according to claim 1, wherein a battery support (11) is arranged at the bottom of the battery box (1), the battery support (11) is detachably connected to the battery box (1), and the battery core (2) is detachably connected to the battery support (11).
3. The immersed safety energy storage battery according to claim 1, wherein the battery box body (1) is connected with a cooling liquid circulation system, and the cooling liquid circulation system comprises a circulation pipeline with two ends connected into the battery box body (1) and a circulation valve (42), a heat exchange device (43), a cooling liquid tank (44) and a circulation pump (45) which are sequentially connected on the circulation pipeline;
the circulating pipeline comprises an outlet circulating pipeline (41) and an inlet circulating pipeline (47), the outlet circulating pipeline (41) is connected between one end of the battery box body (1) and the circulating valve (42), and the inlet circulating pipeline (47) is connected between the other end of the battery box body (1) and the circulating pump (45);
the inlet circulation pipeline (47) is also provided with a liquid supply one-way valve (46).
4. A submerged safety energy storage battery according to claim 3, wherein the end of the outlet circulation line (41) connected to the battery box (1) is located below the level of the cooling liquid and above the cell pressure relief valve (21), and the other end of the inlet circulation line (47) connected to the battery box (1) is located below the level of the cooling liquid and above the battery holder (11).
5. The submerged safety energy storage battery of claim 4, further comprising a fluid replacement control system comprising a liquid level sensor (51) arranged in the battery box (1), a smoke detector (52) arranged in the battery box (1) and positioned above the liquid level of the cooling liquid, and a controller electrically connected with both the liquid level sensor (51) and the smoke detector (52), wherein the controller is electrically connected with both the circulation valve (42) and the circulation pump (45) respectively, and controls the opening and closing states of the circulation valve (42) and the opening degree of the circulation pump (45).
6. The submerged safety energy storage battery as claimed in claim 1, wherein the battery case (1) is provided with a case safety valve (12), and the height of the case safety valve (12) is higher than the liquid level of the cooling liquid.
7. An immersion type safety energy storage battery according to claim 1, wherein the cooling liquid is electronic fluoridation liquid or perfluoro-hexanone, and the boiling point temperature of the cooling liquid is 45-110 ℃.
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