CN111477934A - Battery pack and vehicle - Google Patents
Battery pack and vehicle Download PDFInfo
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- CN111477934A CN111477934A CN202010368355.1A CN202010368355A CN111477934A CN 111477934 A CN111477934 A CN 111477934A CN 202010368355 A CN202010368355 A CN 202010368355A CN 111477934 A CN111477934 A CN 111477934A
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/64—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
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
- H01M10/6555—Rods or plates arranged between the cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery pack and a vehicle. The battery pack comprises a battery module and a cooling device, wherein the battery module comprises battery direct connection group layers, each battery direct connection group layer at least comprises two battery direct connection groups which are arranged side by side at intervals, each battery direct connection group comprises one or more battery cell stacking bodies, two first tab supports at the same end of the two adjacent battery direct connection groups which are arranged side by side are connected, and an accommodating space is defined between the two battery direct connection groups and the first tab supports at the two ends; even have the heat-conducting plate and directly link group's layer heat laminating with the battery on the liquid cold plate among the cooling device, battery module upper and lower surface equipartition has put the liquid cold plate, one of them liquid cold plate with accommodation space encloses into the holding tank, and the heat-conducting plate inserts in the holding tank and the holding tank is by another liquid cold plate involution, and the heat-conducting glue sets up directly even between group and the heat-conducting plate at the battery. The cooling device in the battery pack has the effects of heat dissipation and protection, and is simple in internal structure and high in heat conduction efficiency of the battery.
Description
Technical Field
The invention belongs to the field of power batteries, and particularly relates to a battery pack and a vehicle.
Background
At present, liquid cooling battery modules are mostly adopted by new energy automobiles to provide power. But the design degree of difficulty of laminate polymer battery liquid cooling system is big, often adopts heat-conducting plate contact laminate polymer battery, and a heat-conducting plate of electric core or two electric cores of a heat-conducting plate contact shares, and the heat-conducting plate is derived the heat of electric core from electric core thickness direction, and this kind of mode not only heat conduction efficiency is low, still can increase battery weight, and electric core quantity is more, and heat-conducting plate quantity is more, and the equipment is also complicated more. In addition, the height of a battery pack is expected to be reduced continuously in the industry at present, but the traditional soft-package battery is often assembled in a standing mode, so that the height of the module is often higher, and the height cannot be reduced due to various requirements of the manufacturing process, the cost and the like of the soft-package battery, and the requirement of reducing the height of a battery system is difficult to adapt.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to propose a battery pack and a vehicle. The cooling device in the battery pack has the heat dissipation and protection effects, and can enable a plurality of battery core stacking bodies to share one heat conduction plate, so that the battery pack is simple in inner structure, high in heat conduction efficiency of the battery, small in assembly difficulty and capable of better meeting the requirement for height reduction of the battery system.
According to a first aspect of the present invention, a battery pack is provided. According to an embodiment of the present invention, the battery pack includes:
the battery module comprises at least one layer of battery direct connection assembly layer, each layer of battery direct connection assembly layer at least comprises two battery direct connection assemblies, each battery direct connection assembly comprises one or more battery cell stacking bodies, each battery cell stacking body respectively and independently comprises a plurality of battery cells stacked along the height direction of the battery module, a plurality of battery direct connection assemblies in each layer of battery direct connection assembly layer are arranged side by side at intervals, two ends of each battery direct connection assembly distributed along the length direction of the battery direct connection assembly layer are respectively and independently provided with a first tab support, two first tab supports at the same end of the two adjacent battery direct connection assemblies arranged side by side are connected, and an accommodating space is defined between the two battery direct connection assemblies and the first tab supports at the two ends;
cooling device, cooling device includes that heat-conducting glue, heat-conducting plate and two at least liquid cold boards, be connected with on the liquid cold board the heat-conducting plate, the liquid cold board with the battery directly links the group layer thermal contact just battery module upper surface and lower surface equipartition have been put the liquid cold board, one of them the liquid cold board with accommodation space encloses to close and forms the holding tank, the heat-conducting plate inserts in the holding tank just the holding tank is by another the involution of liquid cold board, arbitrary two adjacent and arrange side by side the battery directly links to organize between the equipartition and has been put the heat-conducting plate, the heat-conducting glue sets up the battery directly link group with between the heat-conducting plate.
The battery pack of the above embodiment of the present invention has at least the following advantages: 1) the battery cell stacking body adopts a mode that the battery cells are laid horizontally, so that the height requirement of the battery pack can be met by adjusting the stacking thickness of a plurality of layers of battery cells in the battery cell stacking body and the number of layers of the direct battery pack; 2) the cooling adopts a mode that heat-conducting glue is directly filled in gaps between the heat-conducting plate and the stacked battery core body to directly contact the battery core, and the heat-conducting glue is filled and distributed on the side surfaces of all the parallel battery cores in the stacked battery core body, so that the cooling efficiency is higher; 3) the liquid cooling plate and the heat conducting plate can be fixed by utilizing the stacking structure of the battery module, and the inherent structure of the battery pack is utilized to replace a part for supporting and fixing the cooling device, so that the heat dissipation efficiency of the battery can be improved, the internal structure of the battery can be simplified, and the cost of the battery can be reduced; 4) the protective plate structure of the existing battery module can be replaced by the liquid cooling plate, so that the liquid cooling plate has cooling and protective effects, and cooling parts can be added on the basis of not increasing the structure of the existing battery module, so that the cooling effect can be improved, and the internal structure of the battery can be simplified; 5) the battery that can make two adjacent parallel arrangements directly links the group, and even multilayer battery directly links two adjacent battery that arrange side by side in the group layer and directly links a heat-conducting plate of group sharing, the quantity of heat-conducting plate among the cooling device that from this can greatly reduced to make battery inner structure simpler. Compared with the prior art, the cooling device in the battery pack has the heat dissipation and protection effects, and can enable the plurality of battery core stacking bodies to share one heat conduction plate, so that the battery pack is simple in internal structure, high in heat conduction efficiency of the battery, small in assembly difficulty and capable of meeting the requirement for height reduction of the battery system better.
In addition, the battery pack according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the present invention, the heat conducting plate is T-shaped connected with the liquid cooling plate and distributed on the upper side and/or the lower side of the liquid cooling plate.
In some embodiments of the present invention, each layer of the direct battery pack layer shares one of the liquid cooling plates, and at least one layer of the direct battery pack layers shares one of the heat conducting plates.
In some embodiments of the present invention, the cooling device includes two liquid-cooled plates, one of the liquid-cooled plates is disposed on the lower surface of the battery module and the heat-conducting plate is disposed on the upper side of the liquid-cooled plate, and the other of the liquid-cooled plates is disposed on the upper surface of the battery module and the heat-conducting plate is disposed on the lower side of the liquid-cooled plate.
In some embodiments of the present invention, each of the liquid cooling plates is independently provided with a thermal conductive adhesive filling opening and a cover body matched with the thermal conductive adhesive filling opening.
In some embodiments of the present invention, heat insulation foam is independently disposed between any two adjacent battery cell stacking layers, and heat insulation foam is independently disposed between the liquid cooling plate and any one of the battery direct connection group layers.
In some embodiments of the present invention, a first fixing hole is formed in the first tab holder, and a first connecting hole or a first protrusion corresponding to the first fixing hole is formed in the liquid cooling plate.
In some embodiments of the present invention, each of the battery direct connection groups includes a plurality of the battery cell stacks connected in series, and a second tab support is independently disposed between two adjacent battery cell stacks, a second fixing hole is disposed on the second tab support, and a second connecting hole or a second protrusion corresponding to the second fixing hole is disposed on the liquid cooling plate.
In some embodiments of the invention, the ratio of the distance of the heat conducting plate in the direction perpendicular to the length direction of the battery straight connection group to the distance between two adjacent battery straight connection groups arranged side by side is (0.2-0.7): 1.
according to a second aspect of the invention, a vehicle is proposed. According to an embodiment of the present invention, the vehicle includes the battery pack described above. Power battery's radiating effect is good and light in weight in this vehicle, and the duration is more stable.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of the internal structure of a battery pack according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a structure of a single cell direct stack layer according to one embodiment of the invention.
Fig. 3 is a plan view of a single layer battery direct stack layer according to one embodiment of the invention.
Fig. 4 is a schematic structural diagram of a first tab holder in two adjacent battery direct connection groups arranged side by side according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of a second polar ear mount in two adjacent battery direct-connection groups arranged side by side according to an embodiment of the invention.
Fig. 6 is a schematic structural diagram of a battery direct connection set according to an embodiment of the invention.
Fig. 7 is a schematic structural diagram of a single cell direct stack layer according to yet another embodiment of the invention.
FIG. 8 is a simplified schematic illustration of the configuration of a liquid-cooled panel according to one embodiment of the present invention.
Fig. 9 is a schematic view of a liquid-cooled panel according to yet another embodiment of the present invention.
Fig. 10 is a schematic diagram of the relative positions of the insulating foam and the cell direct stack layers according to one embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "attached," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The term "thermal contact" may be direct contact or indirect contact through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
According to a first aspect of the present invention, a battery pack is provided. According to an embodiment of the present invention, referring to fig. 1 to 7, the battery pack includes: a battery module 100 and a cooling device 200. The battery module 100 comprises at least one battery direct connection group layer 110, each battery direct connection group layer 110 at least comprises two battery direct connection groups 111, each battery direct connection group 111 comprises one or more battery cell stacked bodies A, each battery cell stacked body A respectively and independently comprises a plurality of battery cells stacked along the height direction of the battery module, the plurality of battery direct connection groups 111 in each battery direct connection group layer 110 are arranged side by side and at intervals, two ends of each battery direct connection group 111 distributed along the length direction of the battery direct connection group are respectively and independently provided with a first tab support 112, two first tab supports 112 at the same end of the two adjacent battery direct connection groups 111 arranged side by side are connected, a containing space is defined between the two battery direct connection groups 111 and the first tab supports 112 at the two ends, and the two first tab supports 112 can be attached and connected; cooling device 200 includes heat-conducting glue 210, heat-conducting plate 220 and two at least liquid cold plates 230, be connected with heat-conducting plate 220 on the liquid cold plate, liquid cold plate 230 and the direct group layer 110 thermal contact of battery and battery module 100 upper surface and lower surface equip with liquid cold plate 230, one of them liquid cold plate 230 and accommodation space enclose and close and form holding tank 120, heat-conducting plate 220 inserts in holding tank 120 and holding tank 120 is closed by another liquid cold plate 230, heat-conducting plate 220 has been arranged to arbitrary two adjacent and the battery that arranges side by side is directly even between organizing 111, heat-conducting glue 210 sets up between battery directly organizes 111 and heat-conducting plate 220. The cooling device in the battery pack has the heat dissipation and protection effects, and can enable a plurality of battery core stacking bodies to share one heat conduction plate, so that the battery pack is simple in inner structure, high in heat conduction efficiency of the battery, small in assembly difficulty and capable of better meeting the requirement for height reduction of the battery system. Note that the liquid cooling plate has a cooling liquid passage built therein and the heat conducting plate does not have a cooling liquid passage.
The battery pack according to the above embodiment of the present invention will be described in detail with reference to fig. 1 to 10.
According to an embodiment of the present invention, the heat conducting plate 220 and the liquid cooling plate 230 are connected in a T shape and may be distributed on the upper side and/or the lower side of the liquid cooling plate 230, the battery cell transfers heat to the heat conducting plate through the heat conducting glue, the heat of the battery cell is transferred to the liquid cooling plate through the heat conducting plate, and then the heat is taken away through the cooling liquid in the liquid cooling plate.
According to another embodiment of the present invention, the heat conductive glue may be a heat conductive gel having a thermal conductivity of not less than 1W/m · K, thereby further improving the heat dissipation effect of the cooling device.
According to another embodiment of the present invention, each of the battery direct connection group layers 110 may share one liquid cooling plate 230, and two adjacent rows of the battery direct connection groups 111 arranged side by side in at least one of the battery direct connection group layers 110 share one heat conducting plate. Therefore, the structure of the cooling device can be further simplified, the heat dissipation efficiency of the battery core can be ensured, and the heat of each battery core can be timely transmitted to the heat-conducting glue and then led out through the heat-conducting plate to be taken away by the liquid cooling plate. It should be noted that the battery straight-connected groups in the battery module are stacked in rows along the height direction of the module.
According to another embodiment of the present invention, referring to fig. 1, the cooling device 200 may include two liquid-cooled plates 230, one liquid-cooled plate 230 is disposed on the lower surface of the battery module 100, and the heat-conducting plates 220 are disposed on the upper surface of the battery module 100, and the heat-conducting plates 220 are disposed on the lower sides of the liquid-cooled plates, that is, the liquid-cooled plates are in thermal contact with the lower surface of the bottom battery direct-connected group layer and the upper surface of the top battery direct-connected group, respectively, so that the structure of the cooling device may be further simplified, and the heat of each battery cell may be transferred to the heat-conducting glue in time and guided out by the liquid-cooled plates through the heat-conducting plates, and the battery cells in the battery cell stack may be effectively protected, thereby preventing damage to the battery cells during transportation or assembly, and sealing the accommodating groove, and preventing the heat-conducting glue. Further, the two adjacent rows of the battery direct connection groups 111 arranged side by side preferably share one heat conduction plate, so that not only can the cooling effect be ensured, but also the number of cooling plates can be further reduced, and the internal structure of the battery can be simplified.
According to another embodiment of the present invention, as shown in fig. 8, each liquid-cooling plate 230 may be independently provided with a groove 231 which is matched and connected with the heat-conducting plate 220 of another liquid-cooling plate 230, so that the two liquid-cooling plates arranged up and down can be fastened with each other, thereby not only ensuring that the heat-conducting plates are uniformly distributed at each height position in the accommodating groove and ensuring the heat dissipation efficiency, but also ensuring that the liquid-cooling plates are fixed with each other and ensuring the sealing effect of the accommodating groove and the liquid-cooling plates, avoiding the overflow of the heat-conducting glue caused by the vibration of the battery module during the operation process, and further improving the stability of the whole battery module without adding additional fixing accessories.
According to another embodiment of the present invention, each liquid-cooling plate 230 may be independently provided with a thermal conductive paste filling port (not shown) and a cover body (not shown) matching with the thermal conductive paste filling port, wherein the thermal conductive paste filling port may be disposed adjacent to the thermal conductive plate 220 and corresponding to the accommodating groove 120, so that the thermal conductive paste filling port may be further used to fill the thermal conductive paste after the thermal conductive plate is inserted into the accommodating groove, thereby ensuring that no air gap exists between the thermal conductive paste, the thermal conductive plate and the battery cell and forming a good thermal conductive path.
According to another embodiment of the present invention, each liquid-cooled plate 230 may independently contain a plurality of cooling liquid channels, and the plurality of cooling liquid channels share a cooling liquid inlet 232 and a cooling liquid outlet 233. Therefore, the circulating flow of the cooling liquid in the liquid cooling plate can be accelerated, the heat of the battery module is taken away quickly through the cooling liquid, the cooling effect is improved, and the structure of the cooling device can be further simplified. As shown in fig. 9, the cooling fluid inlet 232 and the cooling fluid outlet 233 may be respectively disposed at two sides of the liquid-cooled plate 230 along the length direction of the battery string 111, and preferably, the cooling fluid inlet 232 and the cooling fluid outlet 233 are disposed adjacent to the connection point of the liquid-cooled plate 230 and the first tab support 112.
According to another embodiment of the present invention, as shown in fig. 7 and 9, the first tab holder 112 may be provided with a first fixing hole 114, and the liquid cooling plate 230 may be provided with a first connection hole 234 or a first protrusion 234 corresponding to the first fixing hole 114. From this can make liquid cold drawing and the fixed linking to each other of group layer is directly connected to the battery through first arch and first fixed orifices lock, or utilize the connecting piece to make liquid cold drawing and the fixed linking to each other of group layer is directly connected to the battery through first fixed orifices and first connecting hole.
According to another embodiment of the present invention, as shown in fig. 7 and 9, each of the battery straight connection groups 111 may include a plurality of cell stacks a connected in series along a length direction thereof, and a second tab support 113 is independently disposed between two adjacent cell stacks a, a second fixing hole 115 is disposed on the second tab support 113, and a second connection hole 235 or a second protrusion 235 corresponding to the second fixing hole 115 is disposed on the liquid cooling plate 230, so that the liquid cooling plate may be further assisted to be fixedly connected to the battery straight connection group layer by being fastened to the second fixing hole through the second protrusion, or the liquid cooling plate may be further assisted to be fixedly connected to the battery straight connection group layer by using a connection member through the second fixing hole and the second connection hole. As shown in fig. 5, the second pole ear supports 113 in any two adjacent battery straight groups 111 arranged side by side are not attached to each other.
According to still another embodiment of the present invention, the first tab holder 112 and the second tab holder 113 may be independently insulating plastic holders, respectively, thereby not only further contributing to the improvement of the safety and reliability of the battery, but also reducing the overall weight of the battery. It should be noted that the first tab support 112 and the second tab support 113 may be used for supporting the tabs independently, and may be fixedly connected to the adjacent battery direct connection group (layer) and the liquid cooling plate, where the connection may be welding or riveting, such as laser welding, ultrasonic welding, or screw and rivet connection. Two first tab brackets 112 positioned at the same end of any two adjacent battery direct connection groups 111 arranged side by side can be welded or jointed through screw and bolt connection.
According to another specific embodiment of the present invention, as shown in fig. 10, heat insulation foam 300 may be respectively and independently disposed between any two adjacent battery cell stacked bodies a, and heat insulation foam 300 may be respectively and independently disposed between the liquid cooling plate 230 and any one of the battery direct connection group layers a, where the heat insulation foam 300 may be stopped against the first tab support 112 and/or the second tab support 113, so that heat insulation foam may be formed on both upper and lower surfaces of each battery cell stacked body a, thereby separating heat conduction paths of battery cells between each battery cell stacked body, and avoiding an excessive temperature difference between the battery cells during heat conduction.
According to another embodiment of the present invention, the ratio of the distance of the heat conducting plate 220 in the direction perpendicular to the length direction of the battery straight connecting group 111 to the distance between two adjacent battery straight connecting groups 111 arranged side by side may be (0.2-0.7): 1, not only can avoid influencing its abundant contact and the heat transfer effect with electric core because of the heat conduction glue is too little from this, can also avoid answering the heat-conducting plate too thin and influencing the heat transfer capacity in unit interval to can further improve cooling device to the cooling efficiency and the cooling effect of electric core.
According to another embodiment of the present invention, the heat conducting plate 220 and the liquid-cooled plate 230 may be integrally formed, or integrally formed by welding, so as to ensure that the connecting portion of the two is in good heat conducting contact without air gap, wherein the welding may be performed by soldering, argon arc welding, or the like. In addition, the heat conducting plate and the liquid cooling plate can be made of metal with good heat conduction, such as aluminum and aluminum alloy, copper and copper alloy, and the like.
According to another embodiment of the present invention, the arrangement and the number of the battery direct connection groups 111 in each battery direct connection group layer 110 are the same, two adjacent battery direct connection group layers 110 may be connected in series, and the battery direct connection groups 110 in each battery direct connection group layer 110 may be connected in parallel. A plurality of soft-packaged electric cores can stack through the structure gluing bonding in electric core stack body A, and the polarity that piles up electric core both ends is the same, forms the stack group that has a plurality of parallelly connected electric cores, and electric core stack body A series connection welding or riveting get up and form the battery and directly link group 111. All stretch out anodal ear and negative pole ear in every laminate polymer core, wherein anodal ear can be aluminium and/or aluminum alloy, and a plurality of anodal ears connect in parallel as anodal, and the negative pole ear can be copper and/or copper alloy, and a plurality of negative pole ears connect in parallel as the negative pole, and laminate polymer core shell can be the plastic-aluminum membrane.
In summary, the battery pack according to the above embodiment of the present invention has at least the following advantages: 1) the battery cell stacking body adopts a mode that the battery cells are laid horizontally, so that the height requirement of the battery pack can be met by adjusting the stacking thickness of a plurality of layers of battery cells in the battery cell stacking body and the number of layers of the direct battery pack; 2) the cooling adopts a mode that heat-conducting glue is directly filled in gaps between the heat-conducting plate and the stacked battery core body to directly contact the battery core, and the heat-conducting glue is filled and distributed on the side surfaces of all the parallel battery cores in the stacked battery core body, so that the cooling efficiency is higher; 3) the liquid cooling plate and the heat conducting plate can be fixed by utilizing the stacking structure of the battery module, and the inherent structure of the battery pack is utilized to replace a part for supporting and fixing the cooling device, so that the heat dissipation efficiency of the battery can be improved, the internal structure of the battery can be simplified, and the cost of the battery can be reduced; 4) the protective plate structure of the existing battery module can be replaced by the liquid cooling plate, so that the liquid cooling plate has cooling and protective effects, and cooling parts can be added on the basis of not increasing the structure of the existing battery module, so that the cooling effect can be improved, and the internal structure of the battery can be simplified; 5) the battery that can make two adjacent parallel arrangements directly links the group, and even multilayer battery directly links two adjacent battery that arrange side by side in the group layer and directly links a heat-conducting plate of group sharing, the quantity of heat-conducting plate among the cooling device that from this can greatly reduced to make battery inner structure simpler. Compared with the prior art, the cooling device in the battery pack has the heat dissipation and protection effects, and can enable the plurality of battery core stacking bodies to share one heat conduction plate, so that the battery pack is simple in internal structure, high in heat conduction efficiency of the battery, small in assembly difficulty and capable of meeting the requirement for height reduction of the battery system better.
According to a second aspect of the invention, a vehicle is proposed. According to an embodiment of the present invention, the vehicle includes the battery pack described above. Power battery's radiating effect is good and light in weight in this vehicle, and the duration is more stable. It should be noted that the type of the vehicle is not particularly limited, and those skilled in the art can select the vehicle according to actual needs, for example, the vehicle may be a new energy vehicle or the like. In addition, it should be noted that the features and effects described for the battery pack are also applicable to the vehicle, and are not described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A battery pack, comprising:
the battery module comprises at least one layer of battery direct connection assembly layer, each layer of battery direct connection assembly layer at least comprises two battery direct connection assemblies, each battery direct connection assembly comprises one or more battery cell stacking bodies, each battery cell stacking body respectively and independently comprises a plurality of battery cells stacked along the height direction of the battery module, a plurality of battery direct connection assemblies in each layer of battery direct connection assembly layer are arranged side by side at intervals, two ends of each battery direct connection assembly distributed along the length direction of the battery direct connection assembly layer are respectively and independently provided with a first tab support, two first tab supports at the same end of the two adjacent battery direct connection assemblies arranged side by side are connected, and an accommodating space is defined between the two battery direct connection assemblies and the first tab supports at the two ends;
cooling device, cooling device includes that heat-conducting glue, heat-conducting plate and two at least liquid cold boards, be connected with on the liquid cold board the heat-conducting plate, the liquid cold board with the battery directly links the group layer thermal contact just battery module upper surface and lower surface equipartition have been put the liquid cold board, one of them the liquid cold board with accommodation space encloses to close and forms the holding tank, the heat-conducting plate inserts in the holding tank just the holding tank is by another the involution of liquid cold board, arbitrary two adjacent and arrange side by side the battery directly links to organize between the equipartition and has been put the heat-conducting plate, the heat-conducting glue sets up the battery directly link group with between the heat-conducting plate.
2. The battery pack of claim 1, wherein the thermally conductive plate is T-shaped coupled to the liquid-cooled plate and is disposed on an upper side and/or a lower side of the liquid-cooled plate.
3. The battery pack according to claim 1 or 2, wherein each layer of the battery direct connection group layer shares one liquid cooling plate, and at least one layer of the battery direct connection group layer shares one heat conducting plate with two adjacent columns of the battery direct connection groups arranged side by side.
4. The battery pack according to claim 3, wherein the cooling device includes two liquid-cooled plates, one of the liquid-cooled plates is disposed on the lower surface of the battery module and the heat-conductive plates are disposed on the upper side of the liquid-cooled plate, and the other of the liquid-cooled plates is disposed on the upper surface of the battery module and the heat-conductive plates are disposed on the lower side of the liquid-cooled plate.
5. The battery pack according to claim 4, wherein each of the liquid-cooling plates is independently provided with a heat conductive adhesive filling opening and a cover body matching with the heat conductive adhesive filling opening.
6. The battery pack according to claim 1 or 5, wherein thermal insulation foam is independently arranged between any two adjacent battery cell stacked layers, and thermal insulation foam is independently arranged between the liquid cooling plate and any one of the battery direct connection group layers.
7. The battery pack according to claim 6, wherein the first tab holder has a first fixing hole, and the liquid cooling plate has a first connecting hole or a first protrusion corresponding to the first fixing hole.
8. The battery pack according to claim 7, wherein each of the battery direct connection groups includes a plurality of the battery cell stacks connected in series, and a second tab bracket is independently disposed between two adjacent battery cell stacks, and a second fixing hole is disposed on the second tab bracket, and a second connecting hole or a second protrusion corresponding to the second fixing hole is disposed on the liquid cooling plate.
9. The battery pack according to claim 7 or 8, wherein the ratio of the distance of the heat conducting plate in the direction perpendicular to the length direction of the straight battery pack to the distance between two adjacent straight battery packs arranged side by side is (0.2-0.7): 1.
10. a vehicle characterized by comprising the battery pack according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010368355.1A CN111477934A (en) | 2020-04-30 | 2020-04-30 | Battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010368355.1A CN111477934A (en) | 2020-04-30 | 2020-04-30 | Battery pack and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN111477934A true CN111477934A (en) | 2020-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010368355.1A Pending CN111477934A (en) | 2020-04-30 | 2020-04-30 | Battery pack and vehicle |
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| CN (1) | CN111477934A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987272A (en) * | 2020-09-04 | 2020-11-24 | 江苏塔菲尔动力系统有限公司 | Battery pack with liquid cooled from battery side |
| CN113314784A (en) * | 2021-06-01 | 2021-08-27 | 荣盛盟固利新能源科技有限公司 | Power battery module of integrated liquid cooling |
| WO2023133366A1 (en) * | 2022-01-06 | 2023-07-13 | Cps Technology Holdings Llc | Battery thermal management |
| CN117477107A (en) * | 2023-12-28 | 2024-01-30 | 深圳市德兰明海新能源股份有限公司 | Liquid cooling machine case and energy storage device |
-
2020
- 2020-04-30 CN CN202010368355.1A patent/CN111477934A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987272A (en) * | 2020-09-04 | 2020-11-24 | 江苏塔菲尔动力系统有限公司 | Battery pack with liquid cooled from battery side |
| CN113314784A (en) * | 2021-06-01 | 2021-08-27 | 荣盛盟固利新能源科技有限公司 | Power battery module of integrated liquid cooling |
| WO2023133366A1 (en) * | 2022-01-06 | 2023-07-13 | Cps Technology Holdings Llc | Battery thermal management |
| CN117477107A (en) * | 2023-12-28 | 2024-01-30 | 深圳市德兰明海新能源股份有限公司 | Liquid cooling machine case and energy storage device |
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