CN114243161A - Battery pack heat dissipation and thermal runaway protection integrated device and method - Google Patents
Battery pack heat dissipation and thermal runaway protection integrated device and method Download PDFInfo
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- CN114243161A CN114243161A CN202111614027.6A CN202111614027A CN114243161A CN 114243161 A CN114243161 A CN 114243161A CN 202111614027 A CN202111614027 A CN 202111614027A CN 114243161 A CN114243161 A CN 114243161A
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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
-
- 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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch 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
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
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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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
-
- 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
- H01M10/6561—Gases
- H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery pack heat dissipation and thermal runaway protection integrated device and a method; the battery comprises a shell for accommodating a battery monomer and a heat dissipation device for the battery monomer; the interior of the shell is divided into a plurality of cavities for accommodating battery monomers by a plurality of heat insulation plates; the same side of each heat insulation board is attached with a heat conduction plate; the battery monomers are arranged in the cavity, and two side surfaces of each battery monomer are respectively attached to the heat conducting plate and the heat insulating plate; the shell is provided with an end cover, and a safety air valve device is arranged on the end cover; the heat conducting plate is connected with the heat radiating device; the heat of each battery monomer is transferred to the heat dissipation device through the heat conduction plate. The device can improve the heat dispersion and the thermal runaway protection capability of the battery pack, prolong the service life of the battery pack and reduce the loss caused by thermal runaway.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery pack heat dissipation and thermal runaway protection integrated device and method.
Background
The battery pack is composed of a plurality of battery cells and is the core of energy storage and supply of the electrical equipment.
The battery can generate a large amount of heat in the charging and discharging processes, if the heat cannot be dissipated in time, the heat can be accumulated in the battery, the service life of the battery is shortened, and a fire accident can be caused seriously; because the battery can meet various complex working conditions in the service process, such as various abuse conditions of overcharge, overdischarge, collision, high temperature and the like, the battery is easy to generate thermal runaway under the abuse conditions and quickly spread to the whole battery pack, thereby causing huge property loss and even endangering life safety; therefore, battery pack heat dissipation and thermal runaway protection are one of the important research contents of battery pack safety technology.
The traditional battery pack heat dissipation mechanism adopts a single air cooling mode or a single liquid cooling mode.
The traditional air cooling mechanism takes away heat through the fact that outside air flows through the surface of a battery unit, and the outside air generally has certain humidity and dust, so that the interior of a battery pack is easily polluted, and the performance of the battery pack is influenced; the traditional liquid cooling mode takes away battery heat through the cooling pipe that the coolant liquid flows and hug closely with battery monomer, and when the coolant liquid flowed to the cooling pipe end, the temperature was than higher, and the heat absorption capacity descends, leads to being located the battery monomer temperature of cooling pipe end higher easily, and group battery temperature uniformity is relatively poor, shortens the in service life of group battery.
The heat dissipation mechanism of present group battery does not generally have thermal runaway safeguard function, and when battery monomer takes place thermal runaway, because there is not safeguard measure, the huge heat that battery monomer thermal runaway produced can transmit adjacent battery monomer, and adjacent battery monomer takes place thermal runaway in succession, spreads to whole group battery rapidly, triggers the fire accident.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned shortcomings and drawbacks of the prior art and providing an integrated device and method for battery pack heat dissipation and thermal runaway protection. The invention can effectively prevent dust accumulation and humidity rise in the battery pack during air cooling, improve the temperature consistency of liquid cooling, avoid the thermal runaway spread of the battery monomer and ensure the safety of the battery pack.
The invention is realized by the following technical scheme:
a battery pack heat dissipation and thermal runaway protection integrated device comprises a shell 2 for accommodating a battery monomer 1 and a heat dissipation device for the battery monomer 1;
a plurality of heat insulation plates 3 are used for partitioning the interior of the shell 2 into a plurality of cavities 4 for accommodating the battery cells 1; the same side of each heat insulation plate 3 is attached with a heat conduction plate 5;
the battery monomers 1 are arranged in the cavity 4, and two side surfaces of each battery monomer 1 are respectively attached to the heat conducting plate 5 and the heat insulating plate 3;
the shell 2 is provided with an end cover 6, and a safety air valve device is arranged on the end cover 6;
the heat conducting plate 5 is connected with a heat radiating device; the heat of each battery cell 1 is transferred to the heat sink through the heat conducting plate 5.
The heat dissipation device comprises a liquid cooling mechanism 8, and the liquid cooling mechanism 8 is arranged at the bottom of the shell 2;
the liquid cooling mechanism 8 comprises a water pump 11 and a liquid cooling plate 81; cooling liquid flow passages 82 are distributed on the liquid cooling plate 81;
valves are respectively arranged at the cooling liquid inlet and outlet of the cooling liquid flow passage 82;
the water pump 11 is connected to the outlet or the inlet of the cooling liquid; the water pump 11 introduces the coolant into the coolant flow passage 82, so that the coolant circulates in the coolant flow passage 82;
the liquid cooling plate 81 is fixedly connected with the heat conducting plate 5; the heat transfer process of the battery monomer 1 is as follows in sequence: heat transfer plate 5, liquid cooling plate 81, coolant.
The heat dissipation device also comprises an air cooling mechanism 9; the air cooling mechanism 9 is arranged at the bottom of the liquid cooling mechanism 8;
the air cooling mechanism 9 comprises an air duct 91 and a fin array 92 arranged in the air duct 91;
a fan 93 is arranged at the inlet of the air duct 91; the fan 93 introduces external air into the air duct 91, so that the air forms a flowing air flow between the fins of the fin array 92;
the fin array 92 is fixedly connected with the liquid cooling plate 81; the heat transfer process of the battery monomer 1 is as follows in sequence: heat-conducting plate 5, liquid cooling plate 81, fin array 92, air current.
The safety air valve device comprises three valves; wherein, two are pressure release valves 7, and the other is a waterproof vent valve 71;
the pressure release valve 7 is positioned at the top of the end cover 6, and the waterproof ventilation valve 71 is positioned at the side part of the end cover 6.
The cooling liquid flow passages 82 are distributed on the liquid cooling plate 81, and have a rectangular or S-shaped shape.
The outlet of the cooling liquid is installed on the same side as the fan 93.
The top of the shell 2 is provided with a positioning pin 10; the end cap 6 is fixed to the housing 2 by means of a positioning pin 10.
The fin array 92 is flat.
When the temperature of the battery monomer 1 is lower when the battery pack works, only the air cooling mode or the liquid cooling mode is needed to be used independently; when the temperature of the battery monomer 1 rises, the independent cooling mode can not meet the heat dissipation requirement, the air cooling mode and the liquid cooling mode are started, and the liquid cooling mechanism and the air cooling mechanism work simultaneously, so that different heat dissipation requirements are met; when a certain battery monomer 1 takes place the thermal runaway, the thermal runaway protection mode starts, and air cooling and liquid cooling mixed mode are opened, take away the heat that the thermal runaway produced rapidly, and heat insulating board 3 stops heat transfer, and relief valve 7 is opened respectively, and the high pressure gas-solid that the release thermal runaway produced mixes and pressure, if pressure lasts the increase, waterproof ventilation valve 71 springs open, releases more pressure, prevents that the thermal runaway from stretching to whole group battery, falls to the minimum with the loss.
A battery pack heat dissipation and thermal runaway protection method comprises the following steps:
(1) air cooling mode: the fan 93 of the air cooling mechanism 9 is started; when the water pump 11 of the liquid cooling mechanism 8 is turned off, the fan 93 extracts the air flow formed by the outside air, the air flow flows through the fin array 92 of the air cooling mechanism 9 from the inlet of the air duct 91, and the air flow flows out from the outlet of the air duct 91; at the same time, the heat of the battery cell 1 is transferred to: the heat conducting plate 5, the liquid cooling plate 81, the fin array 92 and the airflow;
(2) liquid cooling mode: at the moment, the air cooling mechanism 9 is closed, the two liquid cooling mechanisms 8 are opened by the pressure release valve 7 and the water pump 11, and the cooling liquid enters the cooling liquid flow channel 82 for circulation; at the same time, the heat of the battery cell 1 is transferred to: a heat conducting plate 5, a liquid cooling plate 81, and a cooling liquid;
(3) air cooling and liquid cooling mixed mode: the water pump 11 of the liquid cooling mechanism 8 and the fan 93 of the air cooling mechanism 9 are both started to operate, at the moment, the air cooling mechanism 9 operates according to an air cooling mode, and the liquid cooling mechanism 8 operates according to a liquid cooling mode;
(4) thermal runaway prevention mode: the liquid cooling mode and the air cooling mode are simultaneously opened, and the two pressure release valves 7 are simultaneously or respectively opened;
if the pressure in the housing 2 continues to increase, the waterproof and breathable valve 71 is bounced off to release the pressure.
Compared with the prior art, the invention has the following advantages and effects:
1. according to the invention, the heat of the battery monomer is transferred to the liquid cooling plate by using the heat conducting plate, then the liquid cooling plate transfers the heat to the fins, and the external air flow flows through the fins to take away the heat during air cooling, so that the external air flow is prevented from directly contacting with the battery monomer, and the interior of the battery pack is ensured not to be polluted.
2. The battery pack is cooled by combining an air cooling mode and a liquid cooling mode, and the single air cooling mode, the single liquid cooling mode or the mixed mode of the water cooling and the liquid cooling can be selected according to the temperature of the battery pack during actual working, so that the requirements of the battery pack on different working conditions can be met.
3. The air duct inlet and the coolant flow duct outlet of the air cooling mechanism are located on the same side, and the air duct outlet and the coolant flow duct inlet are located on the same side, namely the air cooling airflow and the coolant flow are opposite in direction, so that the problem that the temperature of the battery pack is poor in inconsistency due to the fact that the temperature of the tail end of the coolant flow duct of the traditional liquid cooling mechanism is high is solved, the uniform temperature distribution in the battery pack is facilitated, the temperature consistency of the battery pack is improved, and the service life of the battery pack is prolonged.
4. The invention prevents the heat transfer between the battery monomers by using the heat insulation plate, and simultaneously, the plurality of pressure release valves and the waterproof vent valve on the shell can release the high-pressure gas-solid mixture and the balance pressure of the battery pack, prevent the battery monomers from thermal runaway spreading to the whole battery pack, protect the safety of the whole battery pack and simultaneously reduce the loss to the minimum.
Drawings
Fig. 1 is a schematic diagram of an integrated device for heat dissipation and thermal runaway protection of a battery pack according to the present invention.
FIG. 2 is a schematic view of a liquid cooling mechanism according to the present invention.
FIG. 3 is a schematic view of the air cooling mechanism of the present invention.
Fig. 4 is a schematic diagram of a battery cell according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
As shown in fig. 1-4. The invention discloses a battery pack heat dissipation and thermal runaway protection integrated device, which comprises a shell 2 for accommodating a battery monomer 1 and a heat dissipation device for the battery monomer 1;
a plurality of heat insulation plates 3 are used for partitioning the interior of the shell 2 into a plurality of cavities 4 for accommodating the battery cells 1; the same side of each heat insulation plate 3 is attached with a heat conduction plate 5; the heat insulation plate 3 effectively prevents heat transfer between the battery cells 1, so that heat generated during work among the battery cells is not interfered with each other.
The battery monomers 1 are arranged in the cavity 4, and two side surfaces of the largest area of each battery monomer 1 are respectively attached to the heat conducting plate 5 and the heat insulating plate 3;
the shell 2 is provided with an end cover 6, and a safety air valve device is arranged on the end cover 6;
the heat conducting plate 5 is connected with a heat radiating device; the heat of each battery cell 1 is transferred to the heat sink through the heat conducting plate 5.
Due to the existence of the heat conducting plate 5, the heat of the single battery 1 is transferred by the heat conducting plate 5, so that the single battery 1 is not in direct contact with a cooling medium (such as cooling liquid and air flow), the single battery 1 can be prevented from being polluted by the cooling medium, and the working environment of the battery pack is kept clean.
The end cover 6 seals the cavity 4 of the battery monomer 1 to prevent the battery monomer from being polluted by the external environment;
the heat dissipation device comprises a liquid cooling mechanism 8, and the liquid cooling mechanism 8 is arranged at the bottom of the shell 2;
the liquid cooling mechanism 8 comprises a water pump 11 and a liquid cooling plate 81; cooling liquid flow passages 82 are distributed on the liquid cooling plate 81;
valves are respectively arranged at the cooling liquid inlet and outlet of the cooling liquid flow passage 82;
the water pump 11 is connected to the outlet or the inlet of the cooling liquid; the water pump 11 introduces the coolant into the coolant flow passage 82, so that the coolant circulates in the coolant flow passage 82;
the liquid cooling plate 81 is fixedly connected with the heat conducting plate 5; the heat transfer process of the battery monomer 1 is as follows in sequence: heat transfer plate 5, liquid cooling plate 81, coolant.
The heat dissipation device also comprises an air cooling mechanism 9; the air cooling mechanism 9 is arranged at the bottom of the liquid cooling mechanism 8;
the air cooling mechanism 9 comprises an air duct 91 and a fin array 92 arranged in the air duct 91;
a fan 93 is arranged at the inlet of the air duct 91; the fan 93 introduces external air into the air duct 91, so that the air forms a flowing air flow between the fins of the fin array 92;
the fin array 92 is fixedly connected with the liquid cooling plate 81; the heat transfer process of the battery monomer 1 is as follows in sequence: heat-conducting plate 5, liquid cooling plate 81, fin array 92, air current.
The safety air valve device comprises three valves; wherein, two are pressure release valves 7, and the other is a waterproof vent valve 71; the waterproof vent valve 71 allows air to enter the chamber 4, prevents moisture from entering, ensures that the battery pack is dry and maintains air pressure equilibrium.
The pressure release valve 7 is positioned at the top of the end cover 6, and the waterproof ventilation valve 71 is positioned at the side part of the end cover 6.
The cooling liquid flow channel 82 is distributed on the liquid cooling plate 81, the shape of the cooling liquid flow channel is rectangular or S-shaped, the length of the cooling liquid flow channel 82 is increased, the cooling liquid can fully absorb heat, and the heat dissipation effect of the liquid cooling mechanism is improved.
The outlet of the cooling liquid is installed on the same side as the fan 93.
The top of the shell 2 is provided with a positioning pin 10; the end cap 6 is fixed to the housing 2 by means of a positioning pin 10.
The fin array 92 is flat.
When battery monomer 1 takes place thermal runaway, heat-conducting plate 5 blocks heat transfer with heat transfer to cooling body rapidly, and heat insulating board 3 prevents heat transfer, prevents that thermal runaway from stretching to whole group battery, and relief valve 7 and waterproof ventilative valve 71 can release high-pressure gas-solid mixture and the pressure that thermal runaway produced simultaneously prevent the emergence of explosion, improve the security of group battery.
When the temperature of the battery monomer 1 is lower when the battery pack works, only the air cooling mode or the liquid cooling mode is needed to be used independently; when the temperature of the battery monomer 1 rises, the independent cooling mode can not meet the heat dissipation requirement, the air cooling mode and the liquid cooling mode are started, and the liquid cooling mechanism and the air cooling mechanism work simultaneously, so that different heat dissipation requirements are met; when a certain battery monomer 1 takes place the thermal runaway, the thermal runaway protection mode starts, and air cooling and liquid cooling mixed mode are opened, take away the heat that the thermal runaway produced rapidly, and heat insulating board 3 stops heat transfer, and relief valve 7 is opened respectively, and the high pressure gas-solid that the release thermal runaway produced mixes and pressure, if pressure lasts the increase, waterproof ventilation valve 71 springs open, releases more pressure, prevents that the thermal runaway from stretching to whole group battery, falls to the minimum with the loss.
The battery pack heat dissipation and thermal runaway protection mode is as follows:
(1) air cooling mode: the fan 93 of the air cooling mechanism 9 is started; when the water pump 11 of the liquid cooling mechanism 8 is turned off, the fan 93 extracts the air flow formed by the outside air, the air flow flows through the fin array 92 of the air cooling mechanism 9 from the inlet of the air duct 91, and the air flow flows out from the outlet of the air duct 91; at the same time, the heat of the battery cell 1 is transferred to: the heat conducting plate 5, the liquid cooling plate 81, the fin array 92 and the airflow;
(2) liquid cooling mode: at the moment, the air cooling mechanism 9 is closed, the two liquid cooling mechanisms 8 are opened by the pressure release valve 7 and the water pump 11, and the cooling liquid enters the cooling liquid flow channel 82 for circulation; at the same time, the heat of the battery cell 1 is transferred to: a heat conducting plate 5, a liquid cooling plate 81, and a cooling liquid;
(3) air cooling and liquid cooling mixed mode: the water pump 11 of the liquid cooling mechanism 8 and the fan 93 of the air cooling mechanism 9 are both started to operate, at the moment, the air cooling mechanism 9 operates according to an air cooling mode, and the liquid cooling mechanism 8 operates according to a liquid cooling mode;
(4) thermal runaway prevention mode: the liquid cooling mode and the air cooling mode are simultaneously opened, and the two pressure release valves 7 are simultaneously or respectively opened;
if the pressure in the housing 2 continues to increase, the waterproof and breathable valve 71 is bounced off to release the pressure.
As described above, the present invention can be preferably realized.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (9)
1. The utility model provides a group battery heat dissipation and thermal runaway protection integrated device, is including casing (2) that hold battery monomer (1) to and the heat abstractor of battery monomer (1), its characterized in that:
a plurality of heat insulation plates (3) are arranged in the shell (2) to divide the shell into a plurality of cavities (4) for accommodating the battery cells (1); the same side surface of each heat insulation board (3) is attached with a heat conduction plate (5);
the battery monomers (1) are arranged in the cavity (4), and two side surfaces of each battery monomer (1) are respectively attached to the heat conducting plate (5) and the heat insulating plate (3);
the shell (2) is provided with an end cover (6), and a safety air valve device is arranged on the end cover (6);
the heat conducting plate (5) is connected with a heat radiating device; the heat of each battery monomer (1) is transferred to the heat dissipation device through the heat conduction plate (5).
2. The integrated device for battery pack heat dissipation and thermal runaway protection of claim 1, wherein:
the heat dissipation device comprises a liquid cooling mechanism (8), and the liquid cooling mechanism (8) is arranged at the bottom of the shell (2);
the liquid cooling mechanism (8) comprises a water pump (11) and a liquid cooling plate (81); cooling liquid flow channels (82) are distributed on the liquid cooling plate (81);
valves are respectively arranged at a cooling liquid inlet and a cooling liquid outlet of the cooling liquid flow passage (82);
the water pump (11) is connected to the outlet or the inlet of the cooling liquid; the water pump (11) introduces the cooling liquid into the cooling liquid flow channel (82) so that the cooling liquid circularly flows in the cooling liquid flow channel (82);
the liquid cooling plate (81) is fixedly connected with the heat conducting plate (5); the heat transfer process of the battery monomer (1) is as follows in sequence: heat-conducting plate (5), liquid cooling board (81), coolant.
3. The integrated device for battery pack heat dissipation and thermal runaway protection as claimed in claim 2, wherein:
the heat dissipation device also comprises an air cooling mechanism (9); the air cooling mechanism (9) is arranged at the bottom of the liquid cooling mechanism (8);
the air cooling mechanism (9) comprises an air duct (91) and a fin array (92) arranged in the air duct (91);
a fan (93) is arranged at the inlet of the air duct (91); the fan (93) introduces external air into the air duct (91) so that the air forms flowing air flow between the fins of the fin array (92);
the fin array (92) is fixedly connected with the liquid cooling plate (81); the heat transfer process of the battery monomer (1) is as follows in sequence: the heat conducting plate (5), the liquid cooling plate (81), the fin array (92) and the airflow.
4. The integrated device for battery pack heat dissipation and thermal runaway protection of claim 3, wherein:
the safety air valve device comprises three valves; wherein, two are pressure release valves (7), and the other is a waterproof vent valve (71);
the pressure release valve (7) is located at the top of the end cover (6), and the waterproof vent valve (71) is located on the side of the end cover (6).
5. The integrated device for battery pack heat dissipation and thermal runaway protection of claim 4, wherein:
the cooling liquid flow channels (82) are distributed on the liquid cooling plate (81) and are rectangular or S-shaped.
6. The integrated device for battery pack heat dissipation and thermal runaway protection of claim 5, wherein:
and the outlet of the cooling liquid is arranged on the same side as the installation position of the fan (93).
7. The integrated device for battery pack heat dissipation and thermal runaway protection of claim 6, wherein:
the top of the shell (2) is provided with a positioning pin (10); the end cover (6) is fixed on the shell (2) through a positioning pin (10).
8. The integrated device for battery pack heat dissipation and thermal runaway protection of claim 7, wherein:
the fin array (92) is in the shape of a flat plate.
9. A battery pack heat dissipation and thermal runaway protection method, characterized by adopting the battery pack heat dissipation and thermal runaway protection integrated device as claimed in any one of claims 1 to 8 to realize:
(1) air cooling mode: starting a fan (93) of the air cooling mechanism (9); when a water pump (11) of the liquid cooling mechanism (8) is closed, the fan (93) pumps air flow formed by outside air, the air flow flows through the fin array (92) of the air cooling mechanism (9) from the inlet of the air channel (91), and the air flow flows out from the outlet of the air channel (91); meanwhile, the heat of the battery single body (1) is transferred to: the heat conduction plate (5), the liquid cooling plate (81), the fin array (92) and the airflow;
(2) liquid cooling mode: at the moment, the air cooling mechanism (9) is closed, two of the liquid cooling mechanisms (8) are opened by the pressure release valve (7) and the water pump (11), and cooling liquid enters the cooling liquid flow channel (82) for circulation; meanwhile, the heat of the battery single body (1) is transferred to: a heat conducting plate (5), a liquid cooling plate (81) and cooling liquid;
(3) air cooling and liquid cooling mixed mode: the water pump (11) of the liquid cooling mechanism (8) and the fan (93) of the air cooling mechanism (9) are both started to operate, at the moment, the air cooling mechanism (9) operates according to an air cooling mode, and the liquid cooling mechanism (8) operates according to a liquid cooling mode;
(4) thermal runaway prevention mode: the liquid cooling mode and the air cooling mode are simultaneously opened, and the two pressure release valves (7) are simultaneously or respectively opened;
if the pressure in the shell (2) is continuously increased, the waterproof ventilation valve (71) is bounced to release the pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111614027.6A CN114243161A (en) | 2021-12-27 | 2021-12-27 | Battery pack heat dissipation and thermal runaway protection integrated device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111614027.6A CN114243161A (en) | 2021-12-27 | 2021-12-27 | Battery pack heat dissipation and thermal runaway protection integrated device and method |
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| Publication Number | Publication Date |
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| CN114243161A true CN114243161A (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111614027.6A Pending CN114243161A (en) | 2021-12-27 | 2021-12-27 | Battery pack heat dissipation and thermal runaway protection integrated device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115360467A (en) * | 2022-09-23 | 2022-11-18 | 四川长虹电源有限责任公司 | Battery system |
-
2021
- 2021-12-27 CN CN202111614027.6A patent/CN114243161A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115360467A (en) * | 2022-09-23 | 2022-11-18 | 四川长虹电源有限责任公司 | Battery system |
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