CN116365103A - Immersed liquid cooling energy storage battery pack heat exchange device - Google Patents
Immersed liquid cooling energy storage battery pack heat exchange device Download PDFInfo
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- CN116365103A CN116365103A CN202310476447.5A CN202310476447A CN116365103A CN 116365103 A CN116365103 A CN 116365103A CN 202310476447 A CN202310476447 A CN 202310476447A CN 116365103 A CN116365103 A CN 116365103A
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- battery pack
- module
- heat exchange
- cooling
- liquid
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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
- H01M10/65—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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- 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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses an immersed liquid cooling energy storage battery pack heat exchange device which comprises a battery pack shell, wherein a module is arranged in an inner cavity of the battery pack shell, a cooling assembly is arranged on the outer side of the module, the cooling assembly comprises a coil, the module is limited on an inner ring of the coil, cooling liquid is filled in the inner cavity of the battery pack shell, the coil is connected with a water chilling unit, and cold water is continuously conveyed into the coil through the water chilling unit. Compared with the existing battery pack thermal management technology, the ordered flow circulation of the cooling liquid in the battery pack is controlled through the flow field design, the temperature consistency is obviously improved, and the maximum temperature difference in the battery pack can be controlled within 2 ℃. The heat exchange efficiency is improved through heat exchange between the coil pipe and the cooling water and the outside, the heat management power consumption is reduced, and the overall heat management power consumption can be reduced by about 50%. The immersed liquid cooling technology is adopted, so that the safety of a battery system is improved, thermal runaway is effectively restrained, the fire hazard is controlled at the minimum unit of the battery pack, and thermal runaway diffusion is prevented.
Description
Technical Field
The invention belongs to the technical field of heat exchange of energy storage systems, and particularly relates to a submerged liquid cooling energy storage battery pack heat exchange device.
Background
At present, most of battery packs of lithium battery energy storage systems adopt forced air cooling, and because an air cooling system is simple in structure and easy to realize. However, with the continuous improvement of the capacity, energy density and charge-discharge multiplying power of the battery pack of the lithium battery energy storage system, higher requirements are placed on heat dissipation of the battery pack. The air cooling system is simple in structure, and the wind speed and the flow direction are difficult to control, so that the characteristics of low heat dissipation efficiency, large temperature difference between single batteries, low safety and the like are caused, and the requirements are difficult to meet.
The liquid heat dissipation capacity of equal volume is more than thousand times of air, and lithium cell energy storage system battery package is placed in insulating cooling liquid, realizes each battery monomer temperature homogeneity more easily, avoids the battery package life-span that the local overheated single cell leads to shorten even inefficacy out of control, and the battery package is isolated with air simultaneously, and the temperature is only less than insulating cooling liquid's self-ignition point, and the battery package can not fire, can improve energy storage system's security greatly.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides the technical scheme of the immersed liquid-cooled energy storage battery pack heat exchange device with high safety and good heat dissipation effect.
An immersed liquid cooling energy storage battery package heat exchange device, including the battery package casing, be provided with the module in the inner chamber of battery package casing, the outside of module is provided with cooling module, cooling module includes the coil pipe, the module is spacing the inner circle of coil pipe, pack in the inner chamber of battery package casing and set up the coolant liquid, the coil pipe is connected with the cooling water set, last to carry the cold water in the coil pipe through the cooling water set.
Further, the modules are provided with a plurality of groups, the groups are arranged in the battery pack shell, the upper end face of each module is provided with a connecting polar plate, and adjacent modules are connected in series through the connecting polar plates.
Further, the module is formed by arranging a plurality of groups of electric cores, an aluminum row is arranged on the upper end face of each electric core, adjacent electric cores are connected in series through the aluminum row, and sampling points are arranged on the aluminum row.
Further, axial flow blades are further arranged in the inner cavity of the battery pack shell, gaps are formed after the modules are arranged, and the axial flow blades are arranged between the gaps.
Further, the module is provided with three rows, two rows of gaps are formed after the module is installed, the axial flow blades are provided with four groups, and the axial flow blades are uniformly distributed in the two rows of gaps.
Further, the axial flow blades arranged in the same gap have the same rotation direction, and the axial flow blades arranged in different gaps have opposite rotation directions.
Further, a fixed frame is arranged on the outer side of the module, and the battery cell is limited in the fixed frame and combined to form the module;
a spacing plate is arranged between adjacent cells, and through holes are formed in the spacing plate, so that adjacent gaps are communicated, and cooling liquid can circulate through the through holes.
Further, an upper cover is arranged at the top of the module, the upper cover is a PET insulating plate, and the upper cover is arranged at the outer side of the aluminum row;
the bottom of the module is provided with a base, and the bases are distributed on two sides of the bottom of the module.
Further, a coil pipe rack is arranged on the inner wall of the battery pack shell, clamping grooves are uniformly distributed on the coil pipe rack, and pipelines of the coil pipe are respectively spliced in the clamping grooves.
Further, the side wall row of the battery pack shell is provided with electrode interfaces, and the electrode interfaces are provided with two groups and are respectively connected with the modules at the two ends of the series-connected module string through connecting polar plates;
the outer wall of the battery pack shell is also provided with a cooling liquid inlet and a cooling liquid outlet;
and two ends of the coil pipe respectively penetrate out of the outer wall of the battery pack shell.
Compared with the prior art, the invention has the following advantages:
the module is immersed in the cooling liquid, the axial flow blades are arranged between the modules, data analysis is carried out according to the collected temperature, so that the axial flow blades are started to drive the cooling liquid in the battery pack to circularly flow, and the temperature consistency of each group of battery cells in the battery pack is ensured.
Meanwhile, the battery cell generates heat in the charge and discharge process, the heat is conducted in the cooling liquid, a coil is arranged on the inner wall of the battery pack shell, flowing cooling water is arranged in the coil, the heat of the cooling liquid is taken away through the action of the cooling water, and the temperature inside the battery pack is kept in an optimal running temperature state.
Drawings
Fig. 1 is a schematic view of a battery pack structure;
FIG. 2 is a schematic view of the battery pack after opening the housing;
FIG. 3 is a schematic view of the internal structure of a battery pack;
FIG. 4 is a schematic diagram of the internal structure of a battery pack;
fig. 5 is a schematic diagram III of the internal structure of the battery pack;
FIG. 6 is a schematic diagram of a chiller and battery pack;
fig. 7 is a schematic diagram of the full circulation flow of the cooling liquid.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1-6, an immersed liquid-cooled energy storage battery pack heat exchange device mainly comprises a battery pack housing 100, a cooling assembly 300 and a module 200, wherein the cooling assembly 300 comprises a set of coils 310, the coils 310 are fixedly installed on the inner wall of the battery pack housing 100 through a coil rack 140, and the module 200 is arranged on the inner ring of the coils 310. Specifically, one side of the coil pipe frame 140 is fixedly connected with the inner wall of the battery pack shell 100, the other side is provided with a plurality of groups of clamping grooves 141 which are uniformly distributed, and the pipelines of each circle of the coil pipe 310 are respectively inserted into the clamping grooves 141 to finish the fixation of the coil pipe 310. The both ends of coil pipe 310 wear out from battery package casing 100 outer wall respectively, and one end is coil pipe water inlet end 311, and the other end is coil pipe water outlet end 312, and coil pipe water inlet end 311 and coil pipe water outlet end 312 are connected to external cooling water set 400 respectively, last to the input cooling water of coil pipe water inlet end 311 through cooling water set 400, and the water after the heat transfer is exported from coil pipe water outlet end 312, and the backward flow is to cooling water set 400, cools down through cooling water set 400, and the repetition is circulated. Referring to fig. 6, a water pump is provided in a pipe connected to the coil water inlet 311 of the chiller 400, and power for inputting chilled water is supplied by the water pump 401. In a lithium battery energy storage system, a plurality of groups of battery packs are arranged, each group of battery packs is connected with a cold water output pipe of a cold water unit 400 through a pipeline, a valve 402 of a flow control system is arranged on the pipeline and is used as an actuator, and the valve generally adopts an electromagnetic valve.
The inner cavity of the battery pack shell 100 is filled with cooling liquid, the liquid level of the cooling liquid after filling is higher than the height of the module 200, the module 200 is completely immersed in the cooling liquid, and the outer wall of the battery pack shell 100 is also provided with a cooling liquid inlet 102 and a cooling liquid outlet 103. The cooling liquid is insulating cooling liquid, and the battery pack is insulated and protected while heat exchange is provided, so that the safety is improved. An axial flow blade 110 is also disposed in the inner cavity of the battery pack housing 100, and is used for driving the cooling liquid to flow in the inner cavity of the battery pack housing 100.
The modules 200 are provided with a plurality of groups, which are arranged in the battery pack case 100, the upper end surfaces of the modules 200 are provided with connection plates 210, and adjacent modules 200 are connected in series through the connection plates 210. The module 200 is formed by arranging a plurality of groups of battery cells 220, wherein an aluminum row 230 is arranged on the upper end surface of each battery cell 220, adjacent battery cells 220 are connected in series through the aluminum row 230, and sampling points 231 are arranged on the aluminum row 230. The modules 200 are arranged to form gaps 120, and the axial flow blades 110 are disposed between the gaps 120. The temperature of the battery cells 220 is monitored through the sampling points 231, and when detecting that temperature differences exist between different sampling points in the battery pack, the axial flow blades 110 arranged between the modules 200 are controlled to be opened, and the flow field of the cooling liquid in the battery pack shell 100 circulates, so that the temperature consistency of each battery cell 220 in the battery pack is realized. The heat generated in the charging and discharging process of the battery is exchanged with the outside through the coil pipe structure, so that the temperature in the battery pack is effectively controlled at the optimal running temperature. The side wall row of the battery pack case 100 is provided with an electrode interface 101, and the electrode interface is provided with two groups, and is respectively connected with the modules 200 at two ends of the series-connected module string through a connecting polar plate 210.
Referring to fig. 7, in the present embodiment, the module 200 is provided with three rows, two rows of gaps 120 are formed after installation, and the axial flow blades 110 are provided with four groups, which are uniformly distributed in the two rows of gaps 120. Referring to fig. 6, the axial flow blades 110 disposed in the same gap 120 are rotated in the same direction, and the axial flow blades 110 disposed in different gaps 120 are rotated in opposite directions. The axial flow blades 110 are started to drive the cooling liquid in the inner cavity of the battery pack shell 100 to flow.
In order to maintain the stability of the module, a fixing frame 240 is disposed on the outer side of the module 200, and the battery cells 220 are limited in the fixing frame 240 to form the module 200. A partition plate 250 is disposed between adjacent cells 220, and through holes 251 are disposed on the partition plate 250 to allow adjacent gaps 120 to communicate with each other, so that coolant can flow through the through holes 251. The top of module 200 is provided with upper cover 201, and upper cover 201 is the PET insulation board, and upper cover 201 sets up in the outside of aluminium row 230, and the module 200 bottom is provided with base 130, and base 130 distributes in the bottom both sides of module 200.
The method aims at solving the problem of temperature consistency of the battery pack, adopts an immersion liquid cooling technology, submerges the battery core/module in insulating cooling liquid, sets axial flow blades inside the battery pack according to design and analysis of a cooling liquid flow field, and enables the cooling liquid inside the battery pack to flow in an orderly and circulating manner according to data analysis of collected temperature, so that the temperature consistency of the battery core module inside the battery pack is ensured.
The lithium battery energy storage system battery pack can generate heat in the charge and discharge process, the heat can be accumulated in the cooling liquid through heat conduction, a coil pipe system is arranged in the battery pack, the heat in the battery pack is taken away through the flow of the cooling water in the coil pipe system, the temperature in the battery pack is controlled in an optimal operation temperature state, a water chilling unit is arranged outside the battery pack, and the temperature of the cooling water can be adjusted to a required temperature.
The electric core/module is wholly immersed in the cooling liquid by adopting an immersion liquid cooling technology, so that the thermal runaway can be effectively restrained, for example, once the thermal runaway occurs, the fire hazard can be controlled at the minimum unit of the battery pack, the thermal runaway diffusion is prevented, and the safety of the lithium battery energy storage system is improved.
Compared with the existing air cooling technology, the immersed liquid cooling can achieve better temperature consistency, the temperature difference in the air cooling battery pack is about 4 ℃, and the temperature difference in the immersed liquid cooling battery pack can be controlled within 2 ℃; because of the difference of heat transfer media, the heat exchange efficiency of the air cooling technology is obviously lower than that of the liquid cooling technology; air cooling cannot inhibit thermal runaway and thermal runaway diffusion, and safety is poor.
Finally, it is expected that compared with the existing battery pack thermal management technology, the ordered flow circulation of the cooling liquid in the battery pack is controlled through the flow field design, the temperature consistency is obviously improved, and the maximum temperature difference in the battery pack can be controlled within 2 ℃. The heat exchange efficiency is improved through heat exchange between the coil pipe and the cooling water and the outside, the heat management power consumption is reduced, and the overall heat management power consumption can be reduced by about 50%. The immersed liquid cooling technology is adopted, so that the safety of a battery system is improved, thermal runaway is effectively restrained, the fire hazard is controlled at the minimum unit of the battery pack, and thermal runaway diffusion is prevented.
Claims (10)
1. The utility model provides an submergence formula liquid cooling energy storage battery package heat exchange device, its characterized in that includes battery package casing (100), be provided with module (200) in the inner chamber of battery package casing (100), the outside of module (200) is provided with cooling module (300), cooling module (300) include coil pipe (310), module (200) are spacing in the inner circle of coil pipe (310), pack in the inner chamber of battery package casing (100) and set up the coolant liquid, pack after the back module (200) submergence in the coolant liquid, coil pipe (310) are connected with cooling water set (400), last to carry the cold water in coil pipe (310) through cooling water set (400).
2. The heat exchange device for the immersed liquid-cooled energy storage battery pack according to claim 1, wherein a plurality of groups of modules (200) are arranged in the battery pack shell (100), the upper end surfaces of the modules (200) are provided with connecting polar plates (210), and adjacent modules (200) are connected in series through the connecting polar plates (210).
3. The heat exchange device for the immersed liquid-cooled energy storage battery pack according to claim 2, wherein the module (200) is formed by arranging a plurality of groups of electric cores (220), an aluminum row (230) is arranged on the upper end face of each electric core (220), adjacent electric cores (220) are connected in series through the aluminum row (230), and sampling points (231) are arranged on the aluminum row (230).
4. A submerged liquid-cooled energy storage battery pack heat exchange device according to claim 2 or 3, characterized in that axial flow blades (110) are further arranged in the inner cavity of the battery pack housing (100), gaps (120) are formed after the modules (200) are arranged, and the axial flow blades (110) are arranged between the gaps (120).
5. The heat exchange device for the immersed liquid-cooled energy storage battery pack according to claim 4, wherein the modules (200) are arranged in three rows, two rows of gaps (120) are formed after the modules are installed, four groups of axial flow blades (110) are arranged, and the axial flow blades are uniformly distributed in the two rows of gaps (120).
6. The heat exchange device of an immersed liquid-cooled energy storage battery pack according to claim 5, wherein the axial flow blades (110) disposed in the same gap (120) rotate in the same direction, and the axial flow blades (110) disposed in different gaps (120) rotate in opposite directions.
7. An immersion liquid cooling energy storage battery pack heat exchange device according to claim 3, characterized in that a fixed frame (240) is arranged on the outer side of the module (200), and a battery cell (220) is limited in the fixed frame (240) and is combined to form the module (200);
a partition plate (250) is arranged between adjacent cells (220), through holes (251) are formed in the partition plate (250), adjacent gaps (120) are communicated, and cooling liquid can circulate through the through holes (251).
8. The heat exchange device of the submerged liquid-cooled energy storage battery pack according to claim 3 or 7, characterized in that an upper cover (201) is arranged at the top of the module (200), the upper cover (201) is a PET insulating plate, and the upper cover (201) is arranged outside the aluminum row (230);
the bottom of the module (200) is provided with a base (130), and the bases (130) are distributed on two sides of the bottom of the module (200).
9. The heat exchange device for the immersed liquid-cooled energy storage battery pack according to claim 1, wherein a coil pipe rack (140) is arranged on the inner wall of the battery pack shell (100), clamping grooves (141) are uniformly distributed on the coil pipe rack (140), and pipelines of the coil pipe (310) are respectively spliced in the clamping grooves (141).
10. The submerged liquid-cooled energy storage battery pack heat exchange device according to claim 2, wherein the side wall of the battery pack shell (100) is provided with electrode interfaces (101), and the electrode interfaces are provided with two groups, and are respectively connected with modules (200) at two ends of the series-connected module string through connecting polar plates (210);
the outer wall of the battery pack shell (100) is also provided with a cooling liquid inlet (102) and a cooling liquid outlet (103);
both ends of the coil pipe (310) respectively penetrate out of the outer wall of the battery pack shell (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310476447.5A CN116365103A (en) | 2023-04-28 | 2023-04-28 | Immersed liquid cooling energy storage battery pack heat exchange device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310476447.5A CN116365103A (en) | 2023-04-28 | 2023-04-28 | Immersed liquid cooling energy storage battery pack heat exchange device |
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| CN116365103A true CN116365103A (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310476447.5A Pending CN116365103A (en) | 2023-04-28 | 2023-04-28 | Immersed liquid cooling energy storage battery pack heat exchange device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118073718A (en) * | 2024-04-25 | 2024-05-24 | 山东电工时代能源科技有限公司 | Immersed liquid-cooled battery pack and cooling control method thereof |
-
2023
- 2023-04-28 CN CN202310476447.5A patent/CN116365103A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118073718A (en) * | 2024-04-25 | 2024-05-24 | 山东电工时代能源科技有限公司 | Immersed liquid-cooled battery pack and cooling control method thereof |
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