CN117317436A - Energy storage battery pack structure - Google Patents
Energy storage battery pack structure Download PDFInfo
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- CN117317436A CN117317436A CN202311308170.1A CN202311308170A CN117317436A CN 117317436 A CN117317436 A CN 117317436A CN 202311308170 A CN202311308170 A CN 202311308170A CN 117317436 A CN117317436 A CN 117317436A
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- Prior art keywords
- heat
- heat conducting
- energy storage
- battery pack
- battery
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- 238000004146 energy storage Methods 0.000 title claims abstract description 52
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 54
- 239000002826 coolant Substances 0.000 claims abstract description 24
- 239000000110 cooling liquid Substances 0.000 claims description 33
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 abstract description 11
- 230000017525 heat dissipation Effects 0.000 description 24
- 238000001816 cooling Methods 0.000 description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 10
- 239000007788 liquid Substances 0.000 description 10
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
-
- 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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- 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 relates to the technical field of power battery energy storage, and particularly discloses an energy storage battery pack structure which comprises an outer shell, radiating fins, a plurality of heat conducting plates, a battery module and a heat conducting aluminum sheet, wherein the heat conducting plates are arranged on the outer shell; wherein, the inside of shell body is formed with the filling cavity that is used for filling insulating coolant, and radiating fin locates the surface of shell body, and a plurality of heat conduction boards are located in filling cavity side by side, and battery module locates between two adjacent heat conduction boards, and every battery module contains a plurality of electric cores of establishing ties, and the both sides of every electric core are located to the heat conduction aluminum sheet, and heat conduction aluminum sheet and heat conduction board mutually perpendicular are equipped with the heat insulating pad between two heat conduction aluminum sheets of arranging two adjacent electric core juncture. When the electric core in the battery package takes place thermal runaway, a large amount of insulating coolant in the battery package can absorb the heat of thermal runaway electric core, and insulating coolant absorbing heat directly dispels the heat through the radiating fin on the shell body, has reduced the risk that the battery package takes place thermal diffusion, can improve energy storage system's security.
Description
Technical Field
The invention relates to the technical field of power battery energy storage, in particular to an energy storage battery pack structure.
Background
At present, in the process of charging and discharging the lithium battery, the battery can generate a large amount of heat, the larger the battery number of the energy storage system is, the more the total heating value is, if the heat dissipation performance of the battery pack is not good, the heat dissipation condition of the energy storage system can be poor, the temperature of the battery is increased, and at the moment, the controller can limit the use power of the energy storage system and reduce the use rate. In addition, the temperature of the battery rises, and the temperature difference of the battery core greatly reduces the performance and service life of the lithium battery and even causes thermal runaway. Therefore, how to improve the safety of the energy storage system is a need to be solved.
For the air-cooled energy storage battery pack with lower cost, as the heat conduction coefficient of air is extremely low and the specific heat is low, the air has insufficient sensible heat to absorb the temperature of the battery, and meanwhile, an air duct is required to be designed in the air-cooled battery pack, so that the air can be contacted with a battery cell to take away heat as much as possible, and the heat exchange efficiency of the air-cooled battery pack is extremely low; air outside the air-cooled battery pack is refrigerated by an air conditioner inside the energy storage system, and the energy efficiency of the energy storage system is low due to low heat exchange efficiency; when the battery is in thermal runaway, fresh wind is continuously supplied to the thermal runaway battery cell, and sufficient oxygen is supplied, so that the battery pack is more prone to thermal expansion, and the safety is reduced.
The energy storage battery pack adopting the bottom cold plate structure is characterized in that heat conducting glue is added between the battery and the liquid cooling plate, water/glycol flows into the liquid cooling plate, and the liquid cooling plate cools the battery pack through heat conductivity. The heat conduction coefficient of the battery is generally between 5 and 18W/m.K, the heat conduction coefficient is not very high, and the heat generated by the battery needs to be transferred to the heat conduction pad, the liquid cooling plate and the water/glycol. The liquid cooling plate and the heat conducting pad increase the heat resistance in the whole heat transfer process, the temperature of the battery surface which is directly contacted with the liquid cooling plate is lower, the temperature of the anode and the cathode of the battery is higher, so that the temperature difference of the battery is larger, the diaphragm inside the battery cell is easier to cause after long-term use, and materials such as the anode and the cathode have larger temperature gradient, and the battery cell is easier to expand due to the temperature stress.
The cost of the system is increased by using the liquid cooling plate, the water/glycol and the heat-conducting glue, the water/glycol needs to be cooled by an external air conditioning unit, the air conditioning unit accounts for about 10% of the cost of the energy storage system, the water/glycol cooling technology of the liquid cooling plate is cooled by the external air conditioning unit, the cost is high, but the uniformity and the safety of the battery temperature are not very high, and the cost performance is not very high.
Finally, when the battery is in thermal runaway, the cold plate liquid battery pack is still filled with air, and the air supply existing when the battery is in thermal runaway is supplied to the thermal runaway battery core, so that the combustion of the battery is facilitated, meanwhile, the temperature of the thermal runaway battery core cannot be taken away quickly and timely, the risk of thermal diffusion still exists, and finally the whole energy storage system is caused to explode.
Disclosure of Invention
The invention aims to solve the technical problems that: how to overcome the defects of uneven heat exchange, low efficiency and high risk of heat diffusion of the battery pack existing in the prior art.
In order to solve the above technical problems, the present invention provides an energy storage battery pack structure, comprising:
an outer case having a filling cavity formed therein for filling an insulating coolant;
the radiating fins are arranged on the outer surface of the outer shell;
a plurality of heat conducting plates, wherein the plurality of heat conducting plates are arranged in the filling cavity side by side;
the battery modules are arranged between two adjacent heat conducting plates, and each battery module comprises a plurality of battery cells connected in series; and
the heat conduction aluminum sheet, the heat conduction aluminum sheet is located every the both sides of electric core, heat conduction aluminum sheet and heat conduction board mutually perpendicular are arranged in two adjacent heat conduction aluminum sheets of electric core juncture are equipped with the heat insulating mattress.
Further preferably, the bottom of the battery module is connected with the inner bottom wall of the outer shell, and the heat conduction aluminum sheets at two sides of each battery cell and the heat conduction plates at two ends of each battery cell are jointly enclosed above the battery cell to form a square area capable of being filled with insulating cooling liquid.
Further preferably, one of opposite ends of the heat conducting aluminum sheet is respectively abutted with two adjacent heat conducting plates, and the other opposite end of the heat conducting aluminum sheet is abutted with the upper inner wall and the lower inner wall of the outer shell.
Further preferably, a plurality of first through holes are formed in the portion, corresponding to the square area above the battery cell, of the heat conducting aluminum sheet.
Further preferably, both ends of the heat conductive plate are respectively abutted against the inner wall of the outer housing.
Further preferably, the heat conducting plate is provided with a plurality of second through holes to form a porous structure.
Further preferably, a first reserved area is arranged between the outermost heat conducting plate and the inner wall of the outer shell, and a second reserved area is arranged between the outermost heat conducting aluminum sheet on each battery module and the inner wall of the outer shell.
Further preferably, module end plates are further arranged between the adjacent heat conducting plates, the module end plates are arranged at two ends of the battery module, and the module end plates are arranged in the second reserved area.
Further preferably, the heat dissipation fins are laid in parallel on the whole outer surface of the outer shell, and the distance between any two adjacent heat dissipation fins is equal.
Further preferably, the insulating coolant is an insulating coolant with high safety, high specific heat and high heat conductivity.
Further preferably, the heat conducting plate further comprises positioning and mounting devices, wherein the positioning and mounting devices are arranged on opposite inner walls of the outer shell, and the positioning and mounting devices are connected with the end parts of the heat conducting plate.
Further preferably, the positioning and mounting device includes:
the upper positioning and mounting blocks are arranged on the inner wall of the outer shell, two upper positioning and mounting blocks are parallel to the heat conducting plate, an upper mounting groove is formed between the two upper positioning and mounting blocks, and the end part of the heat conducting plate is clamped in the upper mounting groove; and
the lower locating and mounting blocks are arranged on the inner wall of the outer shell and are arranged right below the upper locating and mounting blocks, the number of the lower locating and mounting blocks is two and parallel to that of the heat conducting plates, a lower mounting groove is formed between the two lower locating and mounting blocks, and the end parts of the heat conducting plates are clamped in the lower mounting groove.
Further preferably, the upper positioning and mounting block is provided with a fixing hole, the end part of the heat conducting plate is provided with a limiting hole corresponding to the fixing hole, and the fixing hole and the limiting hole are provided with fixing pieces in a penetrating mode.
Compared with the prior art, the energy storage battery pack structure provided by the invention has the beneficial effects that:
according to the invention, the whole battery module is wrapped in an omnibearing manner by filling the insulating cooling liquid in the outer shell, so that heat generated by the battery module can be rapidly transferred to the radiating fins outside the outer shell; in addition, the heat generated by the battery module can be transferred to the heat conducting plate and the heat conducting aluminum sheet, the heat conducting plate and the heat conducting aluminum sheet transfer the heat to the insulating cooling liquid, the contact area between the battery module and the insulating cooling liquid is indirectly increased by the arrangement of the heat conducting plate and the heat conducting aluminum sheet, the overall strength and the bearing capacity of the outer shell can be increased by mutually perpendicular heat conducting aluminum and the heat conducting plate, and the heat insulating pad can reduce the heat transferred to the adjacent battery when the battery core is out of control, so that the heat diffusion risk is reduced;
compared with the existing air cooling and cooling technology, the invention can reduce the cost of the energy storage battery pack and the cost of the energy storage system, and can improve the temperature uniformity of the battery core and the safety of the battery pack, and when the battery pack is in a heat dissipation working condition, the insulating cooling liquid can uniformly improve the temperature of the battery core, so that the service life of the battery pack is prolonged. Because control or battery quality or use unexpected circumstances such as improper take place, the electric core in the battery package takes place thermal runaway easily, and a large amount of insulating coolant in the battery package can absorb thermal runaway electric core's heat, and insulating coolant absorbing heat is directly dispelled the heat through the radiating fin on the shell body, has reduced the risk that the battery package takes place thermal diffusion, can improve energy storage system's security.
Drawings
Fig. 1 is a schematic view of an energy storage battery pack structure according to the present invention.
Fig. 2 is a schematic interior view of the outer housing of the present invention.
Fig. 3 is a schematic view of the internal structure of an energy storage battery pack according to the present invention.
Fig. 4 is an enlarged schematic view of the present invention at a in fig. 2.
Fig. 5 is a cross-sectional view of the present invention.
In the figure, 1, an energy storage battery pack structure; 11. an outer housing; 111. filling the cavity; 112. an upper positioning and mounting block; 113. a fixing hole; 114. a lower positioning and mounting block; 12. a heat radiation fin; 13. a battery module; 131. a battery cell; 14. a heat conducting aluminum sheet; 141. a first through hole; 15. a heat conductive plate; 151. a second through hole; 16. a heat insulating mat; 17. and a module end plate.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper (top)", "lower (bottom)", "inner", "outer", "between", "adjacent", "opposite", "one end", "the other end", "both sides", etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Aiming at the defects of uneven heat exchange, low efficiency and high risk of heat diffusion of a battery pack in the prior art, the invention provides an energy storage battery pack structure for overcoming the defects.
As shown in fig. 1-3, the energy storage battery pack structure 1 includes an outer casing 11 and battery modules 13, wherein each battery module 13 includes a plurality of cells 131 connected in series, a filling cavity 111 for filling an insulating coolant is formed inside the outer casing 11, the insulating coolant is an insulating coolant with high safety, high specific heat and high thermal conductivity, the battery modules 13 are placed in the filling cavity 111, after the insulating coolant is filled in the filling cavity 111, the battery modules 13 can be covered by the insulating coolant, at this time, a part of heat generated by the cells 131 is directly transferred to the outer casing 11 through the insulating coolant, and the outer casing 11 plays a role of bearing the cells, parts and the insulating coolant.
In some examples of the present invention, in order to improve the heat dissipation efficiency of the outer casing 11, it is necessary to arrange the heat dissipation fins 12 on the outer surface of the outer casing 11, so as to increase the contact area between the outer casing 11 and the air, and a part of heat generated by the battery core 131 is directly transferred to the heat dissipation fins 12 outside the outer casing 11 through the insulating cooling liquid, so as to improve the heat dissipation efficiency, preferably, the heat dissipation fins 12 should be parallel laid on the entire outer surface of the outer casing 11, and the distances between any two adjacent heat dissipation fins 12 are equal, so as to increase the contact area between the outer casing 11 and the air to the greatest extent.
In the preferred example of the present invention, the outer case 11 has a rectangular structure, which is simple to process and has low technical difficulty, so that the processing cost can be reduced, and the rectangular structure facilitates the assembly of the heat conductive plate 15, the heat conductive aluminum sheet 14 and the battery module 13, thereby improving the assembly efficiency of the battery pack.
In addition, radiating fins 4 are in a large number, equivalent radiating area is large, radiating fins 4 are arranged on six outer surfaces of the outer shell 11, and each surface can radiate heat with cold air in the energy storage box, so that the radiating capacity of the battery pack 1 is improved, the battery pack can radiate heat through the radiating fins and air conditioning refrigerating wind in the box in the energy storage box, and the high heat exchanging capacity can be achieved by installing a fan in the energy storage box, so that the requirements of forced convection heat exchange and radiation heat exchange are met, the temperature uniformity of the battery is further improved, and the service life of the battery pack is prolonged.
In the invention, as the liquid cooling plate is reduced, the external circulation air conditioner refrigeration and a pipeline system and a control system thereof are reduced, the cost of the battery pack is reduced, and the difficulty of a thermal management control algorithm is also reduced.
The energy storage battery pack structure 1 further comprises a plurality of heat conducting plates 15 and heat conducting aluminum sheets 14, specifically, the number of the heat conducting plates 15 is at least two, in this example, 5 heat conducting plates 15 are preferably arranged in the filling cavity 111 side by side, in order to improve the heat dissipation efficiency of the battery module 13, the battery module 13 should be arranged between two adjacent heat conducting plates 15, so as to ensure that the heat conducting plates 15 and the heat conducting aluminum sheets 14 are respectively in direct contact with the battery cells 131, when the battery cells 131 generate heat, a part of heat is conducted to insulating cooling liquid through the heat conducting plates 15 and the heat conducting aluminum sheets 14, and then is transferred to the heat dissipation fins 12 outside the outer shell 11 by the insulating cooling liquid, and the heat dissipation fins 12 realize heat exchange with cold air outside the battery pack; and the arrangement of the heat conducting plate 15 and the heat conducting aluminum sheet 14 indirectly increases the contact area between the battery module 13 and the insulating cooling liquid, so that the heat dissipation efficiency is further improved.
In addition, the heat conductive aluminum sheet 14 and the heat conductive plate 15 are perpendicular to each other, so that the overall strength and load bearing capacity of the outer case 11 can be increased.
Specifically, the insulating cooling liquid is in direct contact with the battery module 13, the heat conducting plate 15 and the heat conducting aluminum sheet 14, so that the internal heat radiating area of the battery pack is greatly increased, and the battery pack is not filled with air but is high-specific heat insulating cooling liquid, so that the battery pack has enough sensible heat to absorb the temperature generated by the battery, and the temperature of the battery is controlled within a reasonable range after a large amount of heat is absorbed by the cooling liquid. The insulating cooling liquid contacts with each position of the battery, the heat dissipation capacity of the battery pack is strong, the temperature uniformity is good, a large amount of sensible heat of the insulating cooling liquid with high specific heat can also absorb all heat of thermal runaway when a certain battery is in thermal runaway, the temperature of the cooling liquid is still lower, other batteries cannot be heated, and the heat absorbed by the cooling liquid is taken away rapidly through the shell fins 4.
Specifically, when the battery is in thermal runaway, enough high-specific heat insulating cooling liquid is filled in the battery pack, enough sensible heat is provided for absorbing heat of the thermal runaway battery, the temperature of the thermal runaway battery is reduced, the temperature rise of the cooling liquid is not higher than 5 ℃, the heat absorbed by the cooling liquid is rapidly radiated through the fins, other battery cores can not be heated, the heat absorbed by other batteries from the thermal runaway battery is greatly reduced, the thermal runaway of the other batteries is prevented, and therefore the occurrence of thermal diffusion of the battery pack is prevented, and the safety of the energy storage battery pack, the energy storage box and the energy storage station is improved.
In some examples of the present invention, the heat conductive aluminum sheets 14 are disposed at both sides of each cell 131, i.e., the heat conductive aluminum sheets 14 are in direct contact with one face of the cell 131, and may carry a portion of the heat out to transfer into the cooling liquid.
In some examples of the present invention, the heat conducting aluminum sheets 14 and the heat conducting plates 15 are perpendicular to each other, and a heat insulating pad 16 is disposed between two heat conducting aluminum sheets 14 disposed at the interface between two adjacent cells 131, and the heat insulating pad 16 can reduce the heat transferred to the adjacent cells when the cells 131 are out of control, thereby reducing the risk of heat diffusion.
In other examples of the present invention, the bottom of the battery module 13 is connected with the inner bottom wall of the outer case 11 to facilitate the installation and fixation of the battery module 13 in the outer case 11, and at the same time, the battery module 13 is in direct contact with the outer case 11 to facilitate the heat exchange and dissipation with the heat dissipation fins 12 outside the bottom of the outer case 11.
In addition, the heat conducting aluminum sheets 14 on both sides of each cell 131 and the heat conducting plates 15 on both ends of each cell 131 together enclose a rectangular area above the cell 131, which can be filled with insulating coolant, so as to ensure that the insulating coolant can cover the top of the cell 131 and improve the heat dissipation efficiency of the cell 131.
In some examples of the present invention, two ends of the heat conductive plate 15 are respectively abutted against inner walls of the outer case 11 opposite to each other, one opposite end of the heat conductive aluminum sheet 14 is respectively abutted against two adjacent heat conductive plates 15, the other opposite end of the heat conductive aluminum sheet 14 is abutted against upper and lower inner walls of the outer case 11, and the heat conductive aluminum sheet 14 is perpendicular to the heat conductive plate 15, and a mesh structure is formed inside the outer case 11 by using the plurality of heat conductive plates 15 and the heat conductive aluminum sheet 14, so that the transverse and longitudinal strength and rigidity of the battery pack are increased, and the overall supporting strength and load-bearing capacity of the outer case 11 are further increased.
In other examples, the heat conductive aluminum sheet 14 may also be disposed at both sides of the upper end of the cell 131, and the heat conductive aluminum sheet 14 abuts against the upper inner wall of the outer case 11.
It should be noted that, the heat conducting plate 15 and the heat conducting aluminum sheet 14 can effectively isolate two adjacent electric cores 131, so as to avoid the direct transfer of the temperature of one electric core 131 to the adjacent electric core 131 when the thermal runaway occurs, and further improve the safety of the battery pack.
In some examples of the present invention, the portion of the heat conductive aluminum sheet 14 corresponding to the square area above the battery cell 131 is provided with a plurality of first through holes 141, and the plurality of holes on the heat conductive aluminum sheet 14 can enable the insulating coolant to flow in the battery pack, so that the local temperature overheat of the battery cell 131 is avoided.
In some examples of the present invention, the heat conducting plate 15 is provided with a plurality of second through holes 151 to form a porous structure, and the heat conducting plate 15 with a porous structure not only increases the contact area between the heat conducting plate 15 and the insulating coolant, but also ensures that the insulating coolant between different battery modules 13 can flow, and further increases the heat dissipation capability and the uniformity capability.
In some examples of the present invention, a first reserved area is provided between the outermost heat conductive plate 15 and the inner wall of the outer casing 11, and a second reserved area is provided between the outermost heat conductive aluminum sheet 14 on each battery module 13 and the inner wall of the outer casing 11, so that an insulating cooling liquid can be filled in a gap between the battery cell 131 and the outer casing 11, thereby avoiding that heat generated by the battery cell 131 in the area cannot be quickly transferred, and improving temperature uniformity of the whole battery cell.
In some examples of the present invention, module end plates 17 are further disposed between adjacent heat conducting plates 15, the module end plates 17 are disposed at two ends of the battery module 13, the module end plates 17 are disposed in the second reserved area, and the module end plates 17 are disposed to play a role in fixing the battery cells, in this example, the battery module 13 is formed by connecting 13 battery cells 131 in series.
In some examples of the invention, positioning and mounting means are provided on the opposite inner wall of the outer housing 11, the positioning and mounting means being connected to the ends of the heat conducting plate 15. The positioning and mounting device plays a role in limiting, positioning and mounting the heat conducting plate 15, and can effectively improve the assembly efficiency of the battery pack.
In some examples of the present invention, the positioning and mounting device includes an upper positioning and mounting block 112 and a lower positioning and mounting block 114, wherein the upper positioning and mounting block 112 is disposed on the inner wall of the outer shell 11, the upper positioning and mounting block 112 is two and parallel to the heat conducting plate 15, an upper mounting groove is formed between the two upper positioning and mounting blocks 112, and the end of the heat conducting plate 15 is clamped in the upper mounting groove; the lower positioning and mounting blocks 114 are arranged on the inner wall of the outer shell 11 and are arranged right below the upper positioning and mounting blocks 112, the number of the lower positioning and mounting blocks 114 is two and parallel to the heat conducting plate 15, a lower mounting groove is formed between the two lower positioning and mounting blocks 114, and the end part of the heat conducting plate 15 is clamped in the lower mounting groove. During installation, the end parts of the heat conducting plate 15 are respectively embedded into the upper installation groove and the lower installation groove, so that the heat conducting plate 15 can be positioned and installed, and meanwhile, the moving pair of the heat conducting plate 15 in the horizontal direction can be limited, and the installation precision is improved; in addition, the use of a positioning and mounting means to secure the thermally conductive plate 15 facilitates the division of the fill cavity 111 into several securing areas for mounting the cell module.
In some examples of the present invention, the upper positioning and mounting block 112 is provided with a fixing hole 113, the end of the heat conducting plate 15 is provided with a limiting hole (not shown) corresponding to the fixing hole 113, and fixing pieces (not shown) are arranged on the fixing hole 113 and the limiting hole in a penetrating manner, and preferably, the fixing pieces can be positioning pins, bolts, screws and the like, and the fixing pieces can limit the moving pair of the heat conducting plate 15 in the vertical direction, so that the whole battery pack is fixed and mounted more simply, conveniently and quickly, and the cost is low.
In other embodiments, the positioning and mounting device can also adopt three groups, namely, the positioning and mounting blocks are arranged in an upper, middle and lower structure, so as to further improve the structural strength of the battery pack.
In other embodiments, the upper positioning and mounting block 112 and the heat conducting plate 15 may be directly welded, i.e. the processing step of the fixing hole 13 is omitted.
The working process of the invention is as follows: when the battery pack is in a charging/discharging state, when the battery pack is in a heat dissipation working condition, the temperature of the battery core 131 can be evenly increased by wrapping the battery pack with insulating cooling liquid, at the moment, part of heat generated by the battery core 131 is directly transferred to the heat dissipation fins 12 outside the outer shell 11 through the insulating cooling liquid, and the other part of heat is transferred to the insulating cooling liquid through the heat conduction plate 15 and the heat conduction aluminum sheet 14 and then is transferred to the heat dissipation fins 12 outside the outer shell 11 through the insulating cooling liquid, when a certain battery core 131 is in thermal runaway, a large amount of insulating cooling liquid in the battery pack can absorb the heat of the thermal runaway battery core, and the heat absorbed by the insulating cooling liquid is directly dissipated through the heat dissipation fins 12 on the outer shell 11, so that the risk of thermal diffusion of the battery pack is reduced, and the safety of an energy storage system can be improved.
In summary, according to the energy storage battery pack structure provided by the invention, the whole battery module 13 is wrapped in an omnibearing manner by filling the insulating cooling liquid in the outer shell 11, so that heat generated by the battery module 13 can be quickly transferred to the radiating fins 12 outside the outer shell 11, in addition, heat generated by the battery module 13 can also be transferred to the heat conducting plate 15 and the heat conducting aluminum sheet 14, the heat conducting plate 15 and the heat conducting aluminum sheet 14 transfer heat to the insulating cooling liquid, the contact area between the battery module 13 and the insulating cooling liquid is indirectly increased by the arrangement of the heat conducting plate 15 and the heat conducting aluminum sheet 14, the overall strength and the bearing capacity of the outer shell 11 can be increased by mutually perpendicular heat conducting aluminum sheet 14 and heat insulating pad 16 can reduce heat transferred to adjacent batteries when the electric core 131 is in thermal runaway, so that the thermal diffusion risk is reduced; compared with the existing air cooling and cooling technology, the invention can reduce the cost of the energy storage battery pack and the cost of the energy storage system, and can improve the temperature uniformity of the battery core and the safety of the battery pack, and when the battery pack is in a heat dissipation working condition, the temperature of the battery core 131 can be uniformly improved by wrapping the insulating cooling liquid, so that the service life of the battery pack is prolonged. Because control or battery quality or use unexpected circumstances such as improper take place, the electric core 131 in the battery package takes place thermal runaway easily, and a large amount of insulating coolant in the battery package can absorb thermal runaway electric core's heat, and insulating coolant absorbing heat directly dispels the heat through the radiating fin 12 on the shell body 11, has reduced the risk that the battery package takes place thermal diffusion, can improve energy storage system's security.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and substitutions can be made without departing from the technical principles of the present invention, such as changing the number of openings of the heat conducting plate, changing the size and shape of the openings of the heat conducting plate, and changing the number and size of the heat dissipating fins, etc., and these modifications and substitutions should also be considered as the scope of the present invention. While there has been shown and described what are at present considered to be fundamental principles, main features and advantages of the present invention, it will be apparent to those skilled in the art that the present invention is not limited to the details of the foregoing preferred embodiments, and that the examples should be considered as exemplary and not limiting, the scope of the present invention being defined by the appended claims rather than by the foregoing description, and it is therefore intended to include within the invention all changes which fall within the meaning and range of equivalency of the claims.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail herein, but rather is provided for the purpose of enabling those skilled in the art to make and use the embodiments described herein.
Claims (13)
1. An energy storage battery pack structure, comprising:
the shell is internally provided with a filling cavity for filling insulating cooling liquid;
the radiating fins are arranged on the outer surface of the outer shell;
a plurality of heat conducting plates, wherein the plurality of heat conducting plates are arranged in the filling cavity side by side;
the battery modules are arranged between two adjacent heat conducting plates, and each battery module comprises a plurality of battery cells connected in series; and
the heat conduction aluminum sheet, the heat conduction aluminum sheet is located every the both sides of electric core, heat conduction aluminum sheet and heat conduction board mutually perpendicular are arranged in two adjacent heat conduction aluminum sheets of electric core juncture are equipped with the heat insulating mattress.
2. The energy storage battery pack structure according to claim 1, wherein the bottom of the battery module is connected with the inner bottom wall of the outer shell, and heat conduction aluminum sheets on two sides of each battery cell and heat conduction plates on two ends of each battery cell are jointly enclosed above the battery cell to form a rectangular area capable of being filled with insulating cooling liquid.
3. The energy storage battery pack structure according to claim 1, wherein one of opposite ends of the heat conducting aluminum sheet is abutted against the adjacent two heat conducting plates, and the other opposite end of the heat conducting aluminum sheet is abutted against the upper and lower inner walls of the outer case.
4. The energy storage battery pack structure according to claim 1, wherein a portion of the heat conducting aluminum sheet corresponding to the square area above the battery cell is provided with a plurality of first through holes.
5. The energy storage battery pack structure according to claim 1, wherein two ends of the heat conducting plate are respectively abutted against the inner wall of the outer shell body.
6. The energy storage battery pack structure according to claim 1, wherein the heat conducting plate is provided with a plurality of second through holes to form a porous structure.
7. The energy storage battery pack structure according to claim 1, wherein a first reserved area is arranged between the outermost heat conducting plate and the inner wall of the outer shell, and a second reserved area is arranged between the outermost heat conducting aluminum sheet on each battery module and the inner wall of the outer shell.
8. The energy storage battery pack structure according to claim 7, wherein module end plates are further arranged between adjacent heat conducting plates, the module end plates are arranged at two ends of the battery module, and the module end plates are arranged in the second reserved area.
9. The energy storage battery pack structure according to claim 1, wherein the radiating fins are laid in parallel on the whole outer surface of the outer shell, and the distance between any two adjacent radiating fins is equal.
10. The energy storage battery pack structure of claim 1, wherein the insulating coolant is a high-safety, high-specific heat and high-thermal conductivity insulating coolant.
11. The energy storage battery pack structure of claim 1, further comprising positioning and mounting means provided on opposite inner walls of the outer housing, the positioning and mounting means being connected to ends of the heat conductive plate.
12. The energy storage battery pack structure of claim 11, wherein the positioning and mounting means comprises:
the upper positioning and mounting blocks are arranged on the inner wall of the outer shell, two upper positioning and mounting blocks are parallel to the heat conducting plate, an upper mounting groove is formed between the two upper positioning and mounting blocks, and the end part of the heat conducting plate is clamped in the upper mounting groove; and
the lower locating and mounting blocks are arranged on the inner wall of the outer shell and are arranged right below the upper locating and mounting blocks, the number of the lower locating and mounting blocks is two and parallel to that of the heat conducting plates, a lower mounting groove is formed between the two lower locating and mounting blocks, and the end parts of the heat conducting plates are clamped in the lower mounting groove.
13. The energy storage battery pack structure according to claim 12, wherein the upper positioning and mounting block is provided with a fixing hole, the end part of the heat conducting plate is provided with a limiting hole corresponding to the fixing hole, and the fixing hole and the limiting hole are provided with fixing pieces in a penetrating manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311308170.1A CN117317436A (en) | 2023-10-10 | 2023-10-10 | Energy storage battery pack structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311308170.1A CN117317436A (en) | 2023-10-10 | 2023-10-10 | Energy storage battery pack structure |
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| CN117317436A true CN117317436A (en) | 2023-12-29 |
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| CN202311308170.1A Pending CN117317436A (en) | 2023-10-10 | 2023-10-10 | Energy storage battery pack structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691247A (en) * | 2024-02-04 | 2024-03-12 | 双一力(宁波)电池有限公司 | Battery module and energy storage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691247A (en) * | 2024-02-04 | 2024-03-12 | 双一力(宁波)电池有限公司 | Battery module and energy storage system |
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