CN111477930A - Battery pack and vehicle - Google Patents
Battery pack and vehicle Download PDFInfo
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- CN111477930A CN111477930A CN202010366620.2A CN202010366620A CN111477930A CN 111477930 A CN111477930 A CN 111477930A CN 202010366620 A CN202010366620 A CN 202010366620A CN 111477930 A CN111477930 A CN 111477930A
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- battery
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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 assembly layers, each battery direct connection assembly layer at least comprises two battery direct connection assemblies which are arranged side by side at intervals, each battery direct connection assembly comprises one or more battery cell stacking bodies, each battery cell stacking body comprises a plurality of battery cells which are arranged horizontally, two ends of each battery direct connection assembly are provided with first tab supports, two adjacent battery direct connection assemblies which are arranged side by side are connected with the first tab supports at the same end, and an accommodating space is defined between the two battery direct connection assemblies and the first tab supports at the two ends; the liquid cooling daughter board distributes in liquid cooling mainboard top and/or below, the liquid cooling mainboard with accommodation space encloses into the holding tank, and the liquid cooling daughter board inserts in the holding tank and this holding tank is by another liquid cooling mainboard or guard plate involution, and the heat-conducting glue sets up directly even between group and the liquid cooling daughter board at the battery. The battery pack has a simple internal structure and a good cooling effect, and can meet the requirement of reducing the height of a battery.
Description
Technical Field
The invention belongs to the field of power batteries, and particularly relates to a battery pack and a vehicle.
Background
Laminate polymer battery liquid cooling system 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 is a heat-conducting plate of sharing, 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. A plurality of electric core stacks body can share a liquid cooling board in this battery package, and the heat conduction is glued and is exported for the liquid cooling board with the contact of laminate polymer core and with electric core heat direct transfer, and not only heat conduction efficiency is high and battery inner structure is simple, the equipment degree of difficulty is little, the demand that highly reduces of adaptation battery system that can also be better.
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 arranged in a flat manner, 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 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 liquid cooling board and heat conduction glue, the liquid cooling board includes the liquid cooling mainboard and the liquid cooling daughter board of inside intercommunication, the liquid cooling daughter board with liquid cooling mainboard T type is connected and is distributed the top and/or the below of liquid cooling mainboard, the liquid cooling mainboard with the battery directly links the group layer thermal contact, the liquid cooling mainboard with accommodation space encloses and closes and form the holding tank, the liquid cooling daughter board inserts in the holding tank and this holding tank by another liquid cooling mainboard or guard plate involution, arbitrary two adjacent and arrange side by side the battery directly links the equipartition between the group and has put the liquid cooling daughter board, the heat conduction glue sets up the battery directly link the group with between the liquid cooling daughter board.
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 horizontally laid, namely a plurality of battery cells are stacked along the height direction of the battery module, 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 battery direct-connected module layer; 2) the cooling adopts a mode that the heat-conducting glue directly fills the gap between the liquid cooling daughter board and the electric core stacked body to directly contact the electric core, and the heat-conducting glue is filled and distributed on the side surface of each parallel electric core in the electric core stacked body, so that the cooling efficiency is higher; 3) the liquid cooling plate can be fixed by utilizing the stacking structure of the battery module and the liquid cooling plate or the protection plate, 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 protection plate structure of the existing battery module can be replaced by the liquid cooling plate, and the liquid cooling sub-plates are arranged between the two connected columns of battery straight-connected groups, so that the liquid cooling main plate has cooling and protection effects, and cooling parts can be added on the basis of not increasing the structure of the existing battery module, thereby improving the cooling effect and simplifying the internal structure of the battery; 5) the battery that can make two adjacent parallel arrangements directly links the group, and multilayer battery directly links two adjacent battery that arrange side by side in the group layer even and directly links a liquid cooling daughter board of group sharing, can the quantity of greatly reduced liquid cooling daughter board from this to make liquid cooling board and battery inner structure simpler. Compared with the prior art, a plurality of electric core stacks body can share a liquid cooling board in this battery package, and the heat conduction glue with the contact of laminate polymer battery core and with electric core heat direct transfer for liquid cooling board derivation, not only heat conduction efficiency is high and battery inner structure is simple, the equipment degree of difficulty is little, the demand that the adaptation battery system height that can also be better reduces.
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, each layer of the battery direct connection assembly layer shares one liquid cooling motherboard, and at least one layer of the battery direct connection assembly layer shares one liquid cooling daughter board with two adjacent battery direct connection assemblies arranged side by side.
In some embodiments of the present invention, the cooling device includes two liquid-cooled plates, one of the liquid-cooled plates includes a liquid-cooled main board disposed on the lower surface of the battery module and a liquid-cooled daughter board distributed above the liquid-cooled main board, and the other of the liquid-cooled plates includes a liquid-cooled main board disposed on the upper surface of the battery module and a liquid-cooled daughter board distributed below the liquid-cooled main board.
In some embodiments of the present invention, only one liquid cooling daughter board is disposed in any two adjacent rows of the battery direct connection groups arranged side by side in the battery module.
In some embodiments of the present invention, the protection plate and the liquid cooling plate are included, the protection plate is disposed on the lower surface of the battery module, the liquid cooling main plate is disposed on the upper surface of the battery module, and the liquid cooling sub-plate is distributed below the liquid cooling main plate; or, the guard plate is arranged on the upper surface of the battery module, and the liquid cooling mainboard is arranged on the lower surface of the battery module and the liquid cooling daughter board is distributed above the liquid cooling mainboard.
In some embodiments of the present invention, the battery module further includes two protection plates and one liquid cooling plate, the two protection plates are respectively disposed on the lower surface and the upper surface of the battery module, the liquid cooling main board is disposed between two adjacent battery direct connection assembly layers, a part of the liquid cooling sub board is disposed above the liquid cooling main board, and another part of the liquid cooling sub board is disposed below the liquid cooling main board.
In some embodiments of the present invention, the battery direct connection assembly includes one battery cell stack or a plurality of battery cell stacks connected in series, each of the series connections is independently provided with a second tab support, and the liquid cooling plate and/or the protection plate are independently connected to the first tab support and/or the second tab support.
In some embodiments of the present invention, heat insulating foam is independently disposed between any two adjacent battery direct connection assembly layers, heat insulating foam is disposed between the liquid-cooled main board and any one of the battery cell stacking bodies, and heat insulating foam is disposed between the protection board and any one of the battery direct connection assembly layers.
In some embodiments of the invention, the thermal insulation foam has through holes, the first tab support and/or the second tab support between two adjacent battery direct connection assembly layers are connected through the through holes, and the protection plate and/or the liquid cooling main board are respectively and independently connected with the first tab support and/or the second tab support through the through holes.
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 diagram of a liquid-cooled panel according to one embodiment of the invention.
Fig. 8 is a schematic diagram of the internal structure of a battery pack according to still another embodiment of the present invention.
Fig. 9 is a schematic diagram of the internal structure of a battery pack according to yet another embodiment of the present invention.
Fig. 10 is a schematic diagram of the internal structure of a battery pack according to still another embodiment of the present invention.
Fig. 11 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: the battery module 100 and the cooling device 200, the battery module 100 includes at least one layer of battery direct connection group layer 110, each layer of battery direct connection group layer 110 includes at least two battery direct connection groups 111, each battery direct connection group 111 includes one or more battery stacked body a, each battery stacked body a independently includes a plurality of battery cells arranged in a flat lying manner, a plurality of battery direct connection groups 111 in each layer of 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 thereof are respectively and independently provided with a first tab bracket 112, two first tab brackets 112 at the same end of two adjacent battery direct connection groups 111 arranged side by side are connected, and a containing space is defined between the two battery direct connection groups 112 and the first tab brackets 112 at two ends, wherein the two first tab brackets 112 can be jointed and connected; cooling device 200 includes heat conduction glue 210 and liquid cooling board 220, liquid cooling board 220 includes the liquid cooling mainboard 221 and the liquid cooling daughter board 222 of inside intercommunication, liquid cooling daughter board 222 is connected and distributes in the top and/or the below of liquid cooling mainboard 221 for the T type with liquid cooling mainboard 221, liquid cooling mainboard 221 directly organizes layer 110 thermal contact with the battery, liquid cooling mainboard 221 encloses with accommodation space and forms holding tank 120, liquid cooling daughter board 222 inserts in holding tank 120 and this holding tank 120 is joined by another liquid cooling mainboard 221 or guard plate 300 involution, arbitrary two adjacent and the battery that arranges side by side directly even have been put between organizing 111, heat conduction glue 210 sets up between directly organizing 111 of battery and liquid cooling daughter board 221. A plurality of electric core stacks body can share a liquid cooling board in this battery package, and the heat conduction is glued and is exported for the liquid cooling board with the contact of laminate polymer core and with electric core heat direct transfer, and not only heat conduction efficiency is high and battery inner structure is simple, the equipment degree of difficulty is little, the demand that highly reduces of adaptation battery system that can also be better. It should be noted that the liquid cooling main board and the cooling liquid channels in the liquid cooling daughter boards are communicated and can share the cooling liquid inlet and the cooling liquid outlet.
The battery pack according to the above embodiment of the present invention will be described in detail with reference to fig. 1 to 11.
According to an embodiment of the present invention, each layer of the battery direct connection group layer 110 may share one liquid cooling motherboard 221, and at least one layer of the battery direct connection group layer 110 shares one liquid cooling daughter board 222 with two adjacent battery direct connection groups 111 arranged side by side. Therefore, the liquid cooling plate structure 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 liquid cooling plate through the heat conducting glue and taken away by the cooling liquid in the liquid cooling plate.
According to another embodiment of the present invention, referring to fig. 1, the cooling device 200 may include two liquid-cooled plates 220, one liquid-cooled plate 220 includes a liquid-cooled main plate 221 disposed on the lower surface of the battery module 100 and a liquid-cooled sub-plate 222 disposed above the liquid-cooled main plate 221, and the other liquid-cooled plate 220 includes a liquid-cooled main plate 221 disposed on the upper surface of the battery module 110 and a liquid-cooled sub-plate 222 disposed below the liquid-cooled main plate 221, even though the liquid-cooled main plates of the two liquid-cooled plates are in thermal contact with the upper surface of the topmost battery direct connection group layer and the lower surface of the bottommost battery direct connection group, respectively. From this not only can further simplify the cooling device structure, and make the heat of every electric core all can in time transmit for the heat conduction glue and derive through the liquid cooling board, can also be with the protective plate structure complete replacement of current battery module for the liquid cooling board, make the liquid cooling mainboard have cooling and protective effect concurrently, increase cooling unit distribution on the basis that does not increase current battery module structure, thereby can improve the cooling effect, can effectively protect electric core in the electric core stack again, damage electric core when avoiding transportation or equipment, simultaneously can also the involution holding tank, avoid the heat conduction glue because of the battery module vibrations overflow that lead to in the operation process. Further, the two adjacent columns of the battery direct connection groups 111 arranged side by side preferably share one liquid cooling sub-plate 222, so that not only can the cooling effect be ensured, but also the number of the liquid cooling sub-plates can be further reduced, and the liquid cooling plates and the internal structure of the battery are simplified. Further, the liquid cooling daughter board 222 that can be equipped with on the liquid cooling mainboard 221 matches the recess (not shown) that links to each other with the liquid cooling daughter board 222 of another liquid cooling mainboard 221, can make two liquid cooling board lock each other that arrange from top to bottom from this, thereby not only can ensure that each high position in the holding tank equally divides cloth has the liquid cooling daughter board, guarantee the radiating efficiency, can also make reciprocal anchorage between the liquid cooling board, guarantee the involution effect of holding tank and liquid cooling board, thereby avoid the heat-conducting glue because of the battery module vibrations that the operation in-process leads to spill over, and further improve the stability of whole battery module on the basis that does not increase extra fixed annex. 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 invention, only one liquid cooling daughter board 222 is arranged between any two adjacent rows of the battery direct connection groups 111 arranged side by side in the battery module 100, so that the cooling structure can be further simplified on the basis of ensuring the cooling efficiency.
According to another embodiment of the present invention, as shown in fig. 8, the battery module may include a protection plate 300 and a liquid-cooled plate 220, wherein the protection plate 300 is disposed on the lower surface of the battery module 100, the liquid-cooled main board 221 is disposed on the upper surface of the battery module 100, and the liquid-cooled sub-board 222 is disposed below the liquid-cooled main board 221, such that the liquid-cooled main board is in thermal contact with the upper surface of the topmost battery direct connection assembly layer; alternatively, as shown in fig. 9, the protection plate 200 is disposed on the upper surface of the battery module 100, the liquid-cooled motherboard 221 is disposed on the lower surface of the battery module 100, and the liquid-cooled daughter board 222 is distributed above the liquid-cooled motherboard 221, so that the liquid-cooled motherboard is in thermal contact with the lower surface of the bottom battery direct connection assembly layer. From this can utilize the liquid cooling board to replace one of them guard plate, the stacked structure and the guard plate that utilize the battery module simultaneously fix liquid cooling mainboard and liquid cooling daughter board, utilize the inherent structure of battery package and the part that the inherent part replaced the support fixed cooling device, make this liquid cooling mainboard have cooling and protecting effect concurrently, thereby can improve the cooling effect, can effectively protect the electric core in the electric core pile body again, damage electric core when avoiding transporting or assembling, simultaneously can also the involution holding tank, avoid leading hot glue because of the battery module vibrations spill over that leads to at the operation in-process, thereby reach and to improve battery radiating efficiency, can simplify the effect of battery inner structure and reduction battery cost again.
According to another embodiment of the present invention, referring to fig. 10, the battery module 100 may include two protection plates 300 and one liquid-cooled plate 220, the two protection plates 300 are respectively disposed on the lower surface and the upper surface of the battery module 100, the liquid-cooled main plate 221 is disposed between two adjacent battery direct connection assembly layers 110, a portion of the liquid-cooled sub plate 222 is disposed above the liquid-cooled main plate 221, and another portion of the liquid-cooled sub plate 222 is disposed below the liquid-cooled main plate 221. Adopt this mode can ensure that the heat in the pile body of electric core can be derived fast on the basis that does not change current battery module protective structure.
According to another embodiment of the present invention, the protection plate 300 may be provided with a groove (not shown) connected to the liquid-cooled daughter board 222 in a matching manner, so that the liquid-cooled daughter board and the protection plate can be fastened to each other, thereby not only ensuring that the liquid-cooled daughter boards are uniformly distributed at each height position in the accommodating tank, and ensuring the heat dissipation efficiency, but also ensuring that the liquid-cooled daughter boards and the protection plate are fixed to each other, and ensuring the sealing effect on the accommodating tank, thereby not only preventing the heat-conducting adhesive from overflowing due to the vibration of the battery module during the operation process, but also further improving the stability of the entire battery module without adding additional fixing accessories.
According to another embodiment of the present invention, the battery direct connection group 111 may include one cell stack a or a plurality of cell stacks a connected in series, each of the series connections may be independently provided with the second tab support 113, and the liquid-cooled main board 221 and/or the protection board 300 may be independently connected to the first tab support 112 and/or the second tab support 113, wherein the connection may be welding or riveting. Whereby the stability of the entire battery module can be further improved. In addition, the first tab holder 112 and the second tab holder 113 may be respectively and independently insulating plastic holders, which may not only further contribute to the improvement of the safety and reliability of the battery, but also reduce 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 tab support independently and for mutual fixed connection with the adjacent battery direct connection group/cell stack (layer), the liquid cooling plate, and the protection plate, wherein 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 embodiment of the present invention, each liquid-cooled plate 220 may independently contain a plurality of cooling liquid channels, and the plurality of cooling liquid channels share a cooling liquid inlet 223 and a cooling liquid outlet 224. 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. 7, the cooling liquid inlet 223 and the cooling liquid outlet 224 may be disposed on two sides of the liquid-cooled main plate 221 along the length direction of the battery direct connection pack, and preferably, the cooling liquid inlet 223 and the cooling liquid outlet 224 are disposed adjacent to the connection position of the liquid-cooled main plate 221 and the first tab support 112.
According to another embodiment of the present invention, as shown in fig. 11, heat insulation foam 400 may be independently disposed between any two adjacent battery direct connection group layers 110, heat insulation foam 400 may be disposed between the liquid-cooling main board 221 and any one of the cell stack bodies a, and heat insulation foam 400 may be disposed between the protection board 300 and any one of the battery direct connection group layers a. From this can make two upper and lower faces of each electric core stack body A all be formed with thermal-insulated bubble cotton to can separate the electric core heat conduction route between each electric core stack body, the difference in temperature is too big between the electric core when avoiding heat conduction.
According to another embodiment of the present invention, as shown in fig. 11, the thermal insulation foam 400 may have through holes 410, the first tab support 112 and/or the second tab support 113 between two adjacent battery direct connection pack layers 110 are connected through the through holes 410, and the protection plate 300 and/or the liquid-cooled main plate 221 are independently connected to the first tab support 112 and/or the second tab support 113 through the through holes 410, respectively. Connecting pieces between any battery direct connection layer and between the battery direct connection layer and the protection plate or the liquid cooling mainboard can penetrate through the through hole of the thermal insulation foam to be fixed, so that the thermal insulation foam completely covers the surface of the battery direct connection layer, and the electric core heat conduction path between each electric core stacking body can be further ensured to be separated.
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, the ratio of the distance of the liquid cooling daughter board 222 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 may be (0.15-0.8): 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 liquid cooling daughter board too thin and influence the heat transfer capacity in the 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 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 the heat-conducting glue directly fills the gap between the liquid cooling daughter board and the electric core stacked body to directly contact the electric core, and the heat-conducting glue is filled and distributed on the side surface of each parallel electric core in the electric core stacked body, so that the cooling efficiency is higher; 3) the liquid cooling plate can be fixed by utilizing the stacking structure of the battery module and the liquid cooling plate or the protection plate, 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 protection plate structure of the existing battery module can be replaced by the liquid cooling plate, and the liquid cooling sub-plates are arranged between the two connected columns of battery straight-connected groups, so that the liquid cooling main plate has cooling and protection effects, and cooling parts can be added on the basis of not increasing the structure of the existing battery module, thereby improving the cooling effect and simplifying the internal structure of the battery; 5) the battery that can make two adjacent parallel arrangements directly links the group, and multilayer battery directly links two adjacent battery that arrange side by side in the group layer even and directly links a liquid cooling daughter board of group sharing, can the quantity of greatly reduced liquid cooling daughter board from this to make liquid cooling board and battery inner structure simpler. Compared with the prior art, a plurality of electric core stacks body can share a liquid cooling board in this battery package, and the heat conduction glue with the contact of laminate polymer battery core and with electric core heat direct transfer for liquid cooling board derivation, not only heat conduction efficiency is high and battery inner structure is simple, the equipment degree of difficulty is little, the demand that the adaptation battery system height that can also be better reduces.
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 arranged in a flat manner, 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 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 liquid cooling board and heat conduction glue, the liquid cooling board includes the liquid cooling mainboard and the liquid cooling daughter board of inside intercommunication, the liquid cooling daughter board with liquid cooling mainboard T type is connected and is distributed the top and/or the below of liquid cooling mainboard, the liquid cooling mainboard with the battery directly links the group layer thermal contact, the liquid cooling mainboard with accommodation space encloses and closes and form the holding tank, the liquid cooling daughter board inserts in the holding tank and this holding tank by another liquid cooling mainboard or guard plate involution, arbitrary two adjacent and arrange side by side the battery directly links the equipartition between the group and has put the liquid cooling daughter board, the heat conduction glue sets up the battery directly link the group with between the liquid cooling daughter board.
2. The battery pack of claim 1, wherein each layer of the battery direct connection assembly layer shares one of the liquid-cooled main boards, and at least one layer of the battery direct connection assembly layers shares one of the liquid-cooled sub-boards with two adjacent battery direct connection assemblies arranged side by side.
3. The battery pack of claim 2, wherein the cooling device comprises two liquid-cooled plates, one of the liquid-cooled plates has a main liquid-cooled plate disposed on the lower surface of the battery module and the liquid-cooled plate is disposed above the main liquid-cooled plate, and the other of the liquid-cooled plates has a main liquid-cooled plate disposed on the upper surface of the battery module and the liquid-cooled plate is disposed below the main liquid-cooled plate.
4. The battery pack of claim 3, wherein only one liquid cooling daughter board is disposed in any two adjacent rows of the battery direct connection groups arranged side by side in the battery module.
5. The battery pack according to claim 2, comprising one of the protection plates and one of the liquid-cooled plates, wherein the protection plate is disposed on a lower surface of the battery module, the liquid-cooled main plate is disposed on an upper surface of the battery module, and the liquid-cooled sub-plates are distributed below the liquid-cooled main plate; alternatively, the first and second electrodes may be,
the guard plate is established battery module upper surface, the liquid cooling mainboard is established battery module lower surface just the liquid cooling daughter board distributes the top of liquid cooling mainboard.
6. The battery pack according to claim 2, wherein the battery pack comprises two protection plates and one liquid cooling plate, the two protection plates are respectively arranged on the lower surface and the upper surface of the battery module, the liquid cooling main plate is arranged between two adjacent battery direct connection assembly layers, one part of the liquid cooling sub plate is distributed above the liquid cooling main plate, and the other part of the liquid cooling sub plate is distributed below the liquid cooling main plate.
7. The battery pack according to any one of claims 1 to 6, wherein the direct battery connection group comprises one cell stack or a plurality of cell stacks connected in series, each of the series connections is independently provided with a second tab support, and the liquid cooling plate and/or the protection plate are independently connected with the first tab support and/or the second tab support.
8. The battery pack according to claim 7, wherein thermal insulation foam is independently disposed between any two adjacent battery direct connection assembly layers, thermal insulation foam is disposed between the liquid-cooled main board and any one of the battery cell stacking bodies, and thermal insulation foam is disposed between the protection board and any one of the battery direct connection assembly layers.
9. The battery pack according to claim 8, wherein the thermal insulation foam has through holes, the first tab support and/or the second tab support between two adjacent battery direct connection assembly layers are connected through the through holes, and the protection plate and/or the liquid cooling main board are respectively and independently connected with the first tab support and/or the second tab support through the through holes.
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 |
|---|---|---|---|
| CN202010366620.2A CN111477930A (en) | 2020-04-30 | 2020-04-30 | Battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010366620.2A CN111477930A (en) | 2020-04-30 | 2020-04-30 | Battery pack and vehicle |
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| CN111477930A true CN111477930A (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010366620.2A Pending CN111477930A (en) | 2020-04-30 | 2020-04-30 | Battery pack and vehicle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934058A (en) * | 2020-09-01 | 2020-11-13 | 湖北亿纬动力有限公司 | Uniform temperature battery module |
| CN115117540A (en) * | 2022-06-27 | 2022-09-27 | 楚能新能源股份有限公司 | Pack box structure |
| WO2023141888A1 (en) * | 2022-01-27 | 2023-08-03 | 宁德时代新能源科技股份有限公司 | Battery, electrical device, battery preparation method, and battery preparation device |
| WO2024027740A1 (en) * | 2022-08-02 | 2024-02-08 | 比亚迪股份有限公司 | Cooling system for battery, battery pack, and vehicle |
| WO2024113946A1 (en) * | 2022-11-30 | 2024-06-06 | 湖北亿纬动力有限公司 | Battery module and battery pack |
-
2020
- 2020-04-30 CN CN202010366620.2A patent/CN111477930A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934058A (en) * | 2020-09-01 | 2020-11-13 | 湖北亿纬动力有限公司 | Uniform temperature battery module |
| WO2023141888A1 (en) * | 2022-01-27 | 2023-08-03 | 宁德时代新能源科技股份有限公司 | Battery, electrical device, battery preparation method, and battery preparation device |
| CN115117540A (en) * | 2022-06-27 | 2022-09-27 | 楚能新能源股份有限公司 | Pack box structure |
| CN115117540B (en) * | 2022-06-27 | 2023-04-14 | 楚能新能源股份有限公司 | Pack box structure |
| WO2024027740A1 (en) * | 2022-08-02 | 2024-02-08 | 比亚迪股份有限公司 | Cooling system for battery, battery pack, and vehicle |
| WO2024113946A1 (en) * | 2022-11-30 | 2024-06-06 | 湖北亿纬动力有限公司 | Battery module and battery pack |
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